diff options
Diffstat (limited to 'src/northbridge/intel')
| -rw-r--r-- | src/northbridge/intel/e7501/debug.c | 14 | ||||
| -rw-r--r-- | src/northbridge/intel/e7501/raminit.c | 1339 | ||||
| -rw-r--r-- | src/northbridge/intel/e7501/raminit.h | 3 | ||||
| -rw-r--r-- | src/northbridge/intel/i82830/northbridge.c | 1 | ||||
| -rw-r--r-- | src/northbridge/intel/i945/northbridge.c | 1 |
5 files changed, 716 insertions, 642 deletions
diff --git a/src/northbridge/intel/e7501/debug.c b/src/northbridge/intel/e7501/debug.c index 1df2ed3d9c..500ea3e138 100644 --- a/src/northbridge/intel/e7501/debug.c +++ b/src/northbridge/intel/e7501/debug.c @@ -13,7 +13,7 @@ static void print_debug_pci_dev(unsigned dev) print_debug_hex8((dev >> 8) & 7); } -static void print_pci_devices(void) +static inline void print_pci_devices(void) { device_t dev; for(dev = PCI_DEV(0, 0, 0); @@ -58,7 +58,7 @@ static void dump_pci_device(unsigned dev) print_debug("\n"); } -static void dump_pci_devices(void) +static inline void dump_pci_devices(void) { device_t dev; for(dev = PCI_DEV(0, 0, 0); @@ -75,7 +75,7 @@ static void dump_pci_devices(void) } } -static void dump_pci_devices_on_bus(unsigned busn) +static inline void dump_pci_devices_on_bus(unsigned busn) { device_t dev; for(dev = PCI_DEV(busn, 0, 0); @@ -92,7 +92,7 @@ static void dump_pci_devices_on_bus(unsigned busn) } } -static void dump_spd_registers(const struct mem_controller *ctrl) +static inline void dump_spd_registers(const struct mem_controller *ctrl) { int i; print_debug("\n"); @@ -174,7 +174,7 @@ static void dump_spd_registers(const struct mem_controller *ctrl) } } } -static void dump_smbus_registers(void) +static inline void dump_smbus_registers(void) { unsigned device; print_debug("\n"); @@ -215,7 +215,7 @@ static void dump_smbus_registers(void) } } -static void dump_io_resources(unsigned port) +static inline void dump_io_resources(unsigned port) { int i; @@ -249,7 +249,7 @@ static void dump_io_resources(unsigned port) } } -static void dump_mem(unsigned start, unsigned end) +static inline void dump_mem(unsigned start, unsigned end) { unsigned i; print_debug("dump_mem:"); diff --git a/src/northbridge/intel/e7501/raminit.c b/src/northbridge/intel/e7501/raminit.c index 371262251a..9f757e0f79 100644 --- a/src/northbridge/intel/e7501/raminit.c +++ b/src/northbridge/intel/e7501/raminit.c @@ -24,9 +24,9 @@ #if CONFIG_DEBUG_RAM_SETUP #define RAM_DEBUG_MESSAGE(x) print_debug(x) -#define RAM_DEBUG_HEX32(x) print_debug_hex32(x) -#define RAM_DEBUG_HEX8(x) print_debug_hex8(x) -#define DUMPNORTH() dump_pci_device(PCI_DEV(0, 0, 0)) +#define RAM_DEBUG_HEX32(x) print_debug_hex32(x) +#define RAM_DEBUG_HEX8(x) print_debug_hex8(x) +#define DUMPNORTH() dump_pci_device(PCI_DEV(0, 0, 0)) #else #define RAM_DEBUG_MESSAGE(x) #define RAM_DEBUG_HEX32(x) @@ -35,23 +35,23 @@ #endif #define E7501_SDRAM_MODE (SDRAM_BURST_INTERLEAVED | SDRAM_BURST_4) -#define SPD_ERROR "Error reading SPD info\n" +#define SPD_ERROR "Error reading SPD info\n" // NOTE: This used to be 0x100000. -// That doesn't work on systems where A20M# is asserted, because -// attempts to access 0x1000NN end up accessing 0x0000NN. +// That doesn't work on systems where A20M# is asserted, because +// attempts to access 0x1000NN end up accessing 0x0000NN. #define RCOMP_MMIO 0x200000 struct dimm_size { - unsigned long side1; - unsigned long side2; + unsigned long side1; + unsigned long side2; }; /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ -/* DEFINITIONS */ +/* DEFINITIONS */ /**********************************************************************************/ -static const uint32_t refresh_frequency[]= { +static const uint32_t refresh_frequency[] = { /* Relative frequency (array value) of each E7501 Refresh Mode Select * (RMS) value (array index) * 0 == least frequent refresh (longest interval between refreshes) @@ -64,7 +64,8 @@ static const uint32_t refresh_frequency[]= { * [6] reserved -> 0 * [7] 64 clocks -> 4 */ - 0, 2, 3, 1, 0, 0, 0, 4 }; + 0, 2, 3, 1, 0, 0, 0, 4 +}; static const uint32_t refresh_rate_map[] = { /* Map the JEDEC spd refresh rates (array index) to E7501 Refresh Mode @@ -73,7 +74,7 @@ static const uint32_t refresh_rate_map[] = { * The E7501 supports only 15.6 us (1), 7.8 us (2), 64 us (3), and * 64 clock (481 ns) (7) refresh. * [0] == 15.625 us -> 15.6 us - * [1] == 3.9 us -> 481 ns + * [1] == 3.9 us -> 481 ns * [2] == 7.8 us -> 7.8 us * [3] == 31.3 us -> 15.6 us * [4] == 62.5 us -> 15.6 us @@ -81,22 +82,22 @@ static const uint32_t refresh_rate_map[] = { */ 1, 7, 2, 1, 1, 3 }; -#define MAX_SPD_REFRESH_RATE ((sizeof(refresh_rate_map) / sizeof(uint32_t)) - 1) +#define MAX_SPD_REFRESH_RATE ((sizeof(refresh_rate_map) / sizeof(uint32_t)) - 1) // SPD parameters that must match for dual-channel operation static const uint8_t dual_channel_parameters[] = { - SPD_MEMORY_TYPE, - SPD_MODULE_VOLTAGE, - SPD_NUM_COLUMNS, - SPD_NUM_ROWS, - SPD_NUM_DIMM_BANKS, - SPD_PRIMARY_SDRAM_WIDTH, + SPD_MEMORY_TYPE, + SPD_MODULE_VOLTAGE, + SPD_NUM_COLUMNS, + SPD_NUM_ROWS, + SPD_NUM_DIMM_BANKS, + SPD_PRIMARY_SDRAM_WIDTH, SPD_NUM_BANKS_PER_SDRAM }; /* - * Table: constant_register_values + * Table: constant_register_values */ static const long constant_register_values[] = { /* SVID - Subsystem Vendor Identification Register @@ -107,9 +108,9 @@ static const long constant_register_values[] = { * 0x2e - 0x2f * [15:00] Subsystem ID */ - // Not everyone wants to be Super Micro Computer, Inc. - // The mainboard should set this if desired. - // 0x2c, 0, (0x15d9 << 0) | (0x3580 << 16), + // Not everyone wants to be Super Micro Computer, Inc. + // The mainboard should set this if desired. + // 0x2c, 0, (0x15d9 << 0) | (0x3580 << 16), /* Undocumented * (DRAM Read Timing Control, if similar to 855PM?) @@ -128,7 +129,7 @@ static const long constant_register_values[] = { * work at all. * Steven James 02/06/2003 */ - /* NOTE: values now configured in configure_e7501_cas_latency() based + /* NOTE: values now configured in configure_e7501_cas_latency() based * on SPD info and total number of DIMMs (per Intel) */ @@ -172,15 +173,15 @@ static const long constant_register_values[] = { */ // Conservatively say each row has 64MB of ram, we will fix this up later // NOTE: These defaults allow us to prime all of the DIMMs on the board - // without jumping through 36-bit adddressing hoops, even if the - // total memory is > 4 GB. Changing these values may break do_ram_command()! + // without jumping through 36-bit adddressing hoops, even if the + // total memory is > 4 GB. Changing these values may break do_ram_command()! 0x60, 0x00000000, (0x01 << 0) | (0x02 << 8) | (0x03 << 16) | (0x04 << 24), 0x64, 0x00000000, (0x05 << 0) | (0x06 << 8) | (0x07 << 16) | (0x08 << 24), /* DRA - DRAM Row Attribute Register * 0x70 Row 0,1 * 0x71 Row 2,3 - * 0x72 Row 4,5 + * 0x72 Row 4,5 * 0x73 Row 6,7 * [7:7] Device width for Odd numbered rows * 0 == 8 bits wide x8 @@ -201,7 +202,7 @@ static const long constant_register_values[] = { * 101 == 64KB (This page size appears broken) * Others == Reserved */ - // NOTE: overridden by configure_e7501_row_attributes(), later + // NOTE: overridden by configure_e7501_row_attributes(), later 0x70, 0x00000000, 0, /* DRT - DRAM Timing Register @@ -223,9 +224,9 @@ static const long constant_register_values[] = { * Others == Reserved * [23:19] Reserved * [18:16] DRAM idle timer - * 000 == infinite - * 011 == 16 dram clocks - * 001 == 0 clocks + * 000 == infinite + * 011 == 16 dram clocks + * 001 == 0 clocks * [15:11] Reserved * [10:09] Active to Precharge (tRAS) * 00 == 7 clocks @@ -241,9 +242,9 @@ static const long constant_register_values[] = { * [03:03] Write Ras# to Cas# Delay (tRCD) * 0 == 3 DRAM Clocks * 1 == 2 DRAM Clocks - * [02:01] Read RAS# to CAS# Delay (tRCD) - * 00 == reserved - * 01 == reserved + * [02:01] Read RAS# to CAS# Delay (tRCD) + * 00 == reserved + * 01 == reserved * 10 == 3 DRAM Clocks * 11 == 2 DRAM Clocks * [00:00] DRAM RAS# to Precharge (tRP) @@ -251,15 +252,15 @@ static const long constant_register_values[] = { * 1 == 2 DRAM Clocks */ - // Some earlier settings: + // Some earlier settings: /* Most aggressive settings possible */ -// 0x78, 0xc0fff8c4, (1<<29)|(1<<28)|(1<<27)|(2<<24)|(2<<9)|CAS_LATENCY|(1<<3)|(1<<1)|(1<<0), -// 0x78, 0xc0f8f8c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|CAS_LATENCY|(1<<3)|(3<<1)|(1<<0), -// 0x78, 0xc0f8f9c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|CAS_LATENCY|(1<<3)|(3<<1)|(1<<0), +// 0x78, 0xc0fff8c4, (1<<29)|(1<<28)|(1<<27)|(2<<24)|(2<<9)|CAS_LATENCY|(1<<3)|(1<<1)|(1<<0), +// 0x78, 0xc0f8f8c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|CAS_LATENCY|(1<<3)|(3<<1)|(1<<0), +// 0x78, 0xc0f8f9c0, (1<<29)|(1<<28)|(1<<27)|(1<<24)|(1<<16)|(2<<9)|CAS_LATENCY|(1<<3)|(3<<1)|(1<<0), // The only things we need to set here are DRAM idle timer, Back-to-Back Read Turnaround, and // Back-to-Back Write-Read Turnaround. All others are configured based on SPD. - 0x78, 0xD7F8FFFF, (1<<29)|(1<<27)|(1<<16), + 0x78, 0xD7F8FFFF, (1 << 29) | (1 << 27) | (1 << 16), /* FIXME why was I attempting to set a reserved bit? */ /* 0x0100040f */ @@ -271,9 +272,9 @@ static const long constant_register_values[] = { * 0 == Not Complete * 1 == Complete * [28:23] Reserved - * [22:22] Channels - * 0 == Single channel - * 1 == Dual Channel + * [22:22] Channels + * 0 == Single channel + * 1 == Dual Channel * [21:20] DRAM Data Integrity Mode * 00 == Disabled, no ECC * 01 == Reserved @@ -281,10 +282,10 @@ static const long constant_register_values[] = { * 11 == Reserved * [19:18] DRB Granularity (Read-Only) * 00 == 32 MB quantities (single channel mode) - * 01 == 64 MB quantities (dual-channel mode) - * 10 == Reserved - * 11 == Reserved - * [17:17] (Intel Undocumented) should always be set to 1 (SJM: comment inconsistent with current setting, below) + * 01 == 64 MB quantities (dual-channel mode) + * 10 == Reserved + * 11 == Reserved + * [17:17] (Intel Undocumented) should always be set to 1 (SJM: comment inconsistent with current setting, below) * [16:16] Command Per Clock - Address/Control Assertion Rule (CPC) * 0 == 2n Rule * 1 == 1n rule @@ -301,42 +302,42 @@ static const long constant_register_values[] = { * 001 == NOP Command * 010 == All Banks Precharge * 011 == Mode Register Set - * 100 == Extended Mode Register Set + * 100 == Extended Mode Register Set * 101 == Reserved * 110 == CBR Refresh * 111 == Normal Operation * [03:00] Reserved */ -// .long 0x7c, 0xffcefcff, (1<<22)|(2 << 20)|(1 << 16)| (0 << 8), -// .long 0x7c, 0xff8cfcff, (1<<22)|(2 << 20)|(1 << 17)|(1 << 16)| (0 << 8), -// .long 0x7c, 0xff80fcff, (1<<22)|(2 << 20)|(1 << 18)|(1 << 17)|(1 << 16)| (0 << 8), +// .long 0x7c, 0xffcefcff, (1<<22)|(2 << 20)|(1 << 16)| (0 << 8), +// .long 0x7c, 0xff8cfcff, (1<<22)|(2 << 20)|(1 << 17)|(1 << 16)| (0 << 8), +// .long 0x7c, 0xff80fcff, (1<<22)|(2 << 20)|(1 << 18)|(1 << 17)|(1 << 16)| (0 << 8), // Default to dual-channel mode, ECC, 1-clock address/cmd hold // NOTE: configure_e7501_dram_controller_mode() configures further - 0x7c, 0xff8ef8ff, (1<<22)|(2<<20)|(1<<16)|(0<<8), + 0x7c, 0xff8ef8ff, (1 << 22) | (2 << 20) | (1 << 16) | (0 << 8), /* Another Intel undocumented register * 0x88 - 0x8B - * [31:31] Purpose unknown - * [26:26] Master DLL Reset? - * 0 == Normal operation? - * 1 == Reset? - * [07:07] Periodic memory recalibration? - * 0 == Disabled? - * 1 == Enabled? - * [04:04] Receive FIFO RE-Sync? - * 0 == Normal operation? - * 1 == Reset? + * [31:31] Purpose unknown + * [26:26] Master DLL Reset? + * 0 == Normal operation? + * 1 == Reset? + * [07:07] Periodic memory recalibration? + * 0 == Disabled? + * 1 == Enabled? + * [04:04] Receive FIFO RE-Sync? + * 0 == Normal operation? + * 1 == Reset? */ - // NOTE: Some factory BIOSs don't do this. - // Doesn't seem to matter either way. + // NOTE: Some factory BIOSs don't do this. + // Doesn't seem to matter either way. 0x88, 0xffffff00, 0x80, /* CLOCK_DIS - CK/CK# Disable Register * 0x8C * [7:7] DDR Frequency - * 0 == 100 MHz (200 MHz data rate) - * 1 == 133 MHz (266 MHz data rate) + * 0 == 100 MHz (200 MHz data rate) + * 1 == 133 MHz (266 MHz data rate) * [6:4] Reserved * [3:3] CK3 * 0 == Enable @@ -352,7 +353,7 @@ static const long constant_register_values[] = { * 1 == Disable */ // NOTE: Disable all clocks initially; turn ones we need back on - // in enable_e7501_clocks() + // in enable_e7501_clocks() 0x8C, 0xfffffff0, 0xf, /* TOLM - Top of Low Memory Register @@ -383,23 +384,23 @@ static const long constant_register_values[] = { /* DVNP - Device Not Present Register * 0xE0 - 0xE1 * [15:05] Reserved - * [04:04] Device 4 Function 1 Present + * [04:04] Device 4 Function 1 Present * 0 == Present * 1 == Absent - * [03:03] Device 3 Function 1 Present + * [03:03] Device 3 Function 1 Present * 0 == Present * 1 == Absent - * [02:02] Device 2 Function 1 Present + * [02:02] Device 2 Function 1 Present * 0 == Present * 1 == Absent - * [01:01] Reserved - * [00:00] Device 0 Function 1 Present + * [01:01] Reserved + * [00:00] Device 0 Function 1 Present * 0 == Present * 1 == Absent */ // Enable D0:D1, disable D2:F1, D3:F1, D4:F1 - 0xe0, 0xffffffe2, (1<<4)|(1<<3)|(1<<2)|(0<<0), + 0xe0, 0xffffffe2, (1 << 4) | (1 << 3) | (1 << 2) | (0 << 0), // Undocumented 0xd8, 0xffff9fff, 0x00000000, @@ -410,22 +411,22 @@ static const long constant_register_values[] = { * [31:31] Purpose unknown * [30:30] Purpose unknown * [29:23] Unknown - not used? - * [22:22] System Memory MMR Enable + * [22:22] System Memory MMR Enable * 0 == Disable: mem space and BAR at 0x14 are not accessible * 1 == Enable: mem space and BAR at 0x14 are accessible * [21:20] Purpose unknown - * [19:02] Unknown - not used? - * [01:01] D6EN (Device #6 enable) + * [19:02] Unknown - not used? + * [01:01] D6EN (Device #6 enable) * 0 == Disable * 1 == Enable - * [00:00] Unknown - not used? + * [00:00] Unknown - not used? */ 0xf4, 0x3f8ffffd, 0x40300002, #ifdef SUSPICIOUS_LOOKING_CODE // SJM: Undocumented. - // This will access D2:F0:0x50, is this correct?? + // This will access D2:F0:0x50, is this correct?? 0x1050, 0xffffffcf, 0x00000030, #endif }; @@ -453,29 +454,31 @@ static const uint32_t maybe_pull_updown_offset_table[] = { /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ /* TABLES */ /**********************************************************************************/ -#define SLOW_DOWN_IO inb(0x80); +#define SLOW_DOWN_IO inb(0x80) //#define SLOW_DOWN_IO udelay(40); - /* Estimate that SLOW_DOWN_IO takes about 50&76us*/ + /* Estimate that SLOW_DOWN_IO takes about 50&76us */ /* delay for 200us */ #if 1 static void do_delay(void) { int i; - for(i = 0; i < 16; i++) { SLOW_DOWN_IO } + for (i = 0; i < 16; i++) { + SLOW_DOWN_IO; + } } -#define DO_DELAY do_delay(); + +#define DO_DELAY do_delay() #else #define DO_DELAY \ - udelay(200); -#endif + udelay(200) +#endif #define EXTRA_DELAY DO_DELAY - /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ -/* DELAY FUNCTIONS */ +/* DELAY FUNCTIONS */ /**********************************************************************************/ static void die_on_spd_error(int spd_return_value) @@ -485,90 +488,100 @@ static void die_on_spd_error(int spd_return_value) } //---------------------------------------------------------------------------------- -// Function: sdram_spd_get_page_size -// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate -// Return Value: struct dimm_size - log2(page size) for each side of the DIMM. -// Description: Calculate the page size for each physical bank of the DIMM: -// log2(page size) = (# columns) + log2(data width) +// Function: sdram_spd_get_page_size +// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate +// Return Value: struct dimm_size - log2(page size) for each side of the DIMM. +// Description: Calculate the page size for each physical bank of the DIMM: +// log2(page size) = (# columns) + log2(data width) // -// NOTE: page size is the total number of data bits in a row. +// NOTE: page size is the total number of data bits in a row. // -static struct dimm_size sdram_spd_get_page_size(uint16_t dimm_socket_address) +static struct dimm_size sdram_spd_get_page_size(uint16_t + dimm_socket_address) { uint16_t module_data_width; int value; struct dimm_size pgsz; pgsz.side1 = 0; - pgsz.side2 = 0; - + pgsz.side2 = 0; + // Side 1 - value = spd_read_byte(dimm_socket_address, SPD_NUM_COLUMNS); - if (value < 0) goto hw_err; - pgsz.side1 = value & 0xf; // # columns in bank 1 - + value = spd_read_byte(dimm_socket_address, SPD_NUM_COLUMNS); + if (value < 0) + goto hw_err; + pgsz.side1 = value & 0xf; // # columns in bank 1 + /* Get the module data width and convert it to a power of two */ - value = spd_read_byte(dimm_socket_address, SPD_MODULE_DATA_WIDTH_MSB); - if (value < 0) goto hw_err; + value = + spd_read_byte(dimm_socket_address, SPD_MODULE_DATA_WIDTH_MSB); + if (value < 0) + goto hw_err; module_data_width = (value & 0xff) << 8; - value = spd_read_byte(dimm_socket_address, SPD_MODULE_DATA_WIDTH_LSB); - if (value < 0) goto hw_err; + value = + spd_read_byte(dimm_socket_address, SPD_MODULE_DATA_WIDTH_LSB); + if (value < 0) + goto hw_err; module_data_width |= (value & 0xff); pgsz.side1 += log2(module_data_width); /* side two */ value = spd_read_byte(dimm_socket_address, SPD_NUM_DIMM_BANKS); - if (value < 0) goto hw_err; - if (value > 2) + if (value < 0) + goto hw_err; + if (value > 2) die("Bad SPD value\n"); if (value == 2) { - pgsz.side2 = pgsz.side1; // Assume symmetric banks until we know differently - value = spd_read_byte(dimm_socket_address, SPD_NUM_COLUMNS); - if (value < 0) goto hw_err; + pgsz.side2 = pgsz.side1; // Assume symmetric banks until we know differently + value = + spd_read_byte(dimm_socket_address, SPD_NUM_COLUMNS); + if (value < 0) + goto hw_err; if ((value & 0xf0) != 0) { // Asymmetric banks - pgsz.side2 -= value & 0xf; /* Subtract out columns on side 1 */ - pgsz.side2 += (value>>4) & 0xf; /* Add in columns on side 2 */ + pgsz.side2 -= value & 0xf; /* Subtract out columns on side 1 */ + pgsz.side2 += (value >> 4) & 0xf; /* Add in columns on side 2 */ } } - return pgsz; + return pgsz; -hw_err: + hw_err: die(SPD_ERROR); - return pgsz; // Never reached + return pgsz; // Never reached } - //---------------------------------------------------------------------------------- -// Function: sdram_spd_get_width -// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate -// Return Value: dimm_size - width in bits of each DIMM side's DRAMs. -// Description: Read the width in bits of each DIMM side's DRAMs via SPD. -// (i.e. 4, 8, 16) +// Function: sdram_spd_get_width +// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate +// Return Value: dimm_size - width in bits of each DIMM side's DRAMs. +// Description: Read the width in bits of each DIMM side's DRAMs via SPD. +// (i.e. 4, 8, 16) // -static struct dimm_size sdram_spd_get_width(uint16_t dimm_socket_address) +static struct dimm_size sdram_spd_get_width(uint16_t dimm_socket_address) { int value; struct dimm_size width; - + width.side1 = 0; width.side2 = 0; - value = spd_read_byte(dimm_socket_address, SPD_PRIMARY_SDRAM_WIDTH); + value = + spd_read_byte(dimm_socket_address, SPD_PRIMARY_SDRAM_WIDTH); die_on_spd_error(value); - - width.side1 = value & 0x7f; // Mask off bank 2 flag + + width.side1 = value & 0x7f; // Mask off bank 2 flag if (value & 0x80) { width.side2 = width.side1 << 1; // Bank 2 exists and is double-width } else { // If bank 2 exists, it's the same width as bank 1 - value = spd_read_byte(dimm_socket_address, SPD_NUM_DIMM_BANKS); - die_on_spd_error(value); + value = + spd_read_byte(dimm_socket_address, SPD_NUM_DIMM_BANKS); + die_on_spd_error(value); #ifdef ROMCC_IF_BUG_FIXED if (value == 2) @@ -587,94 +600,100 @@ static struct dimm_size sdram_spd_get_width(uint16_t dimm_socket_address) return width; } - + //---------------------------------------------------------------------------------- -// Function: spd_get_dimm_size -// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate -// Return Value: dimm_size - log2(number of bits) for each side of the DIMM -// Description: Calculate the log base 2 size in bits of both DIMM sides. -// log2(# bits) = (# columns) + log2(data width) + -// (# rows) + log2(banks per SDRAM) +// Function: spd_get_dimm_size +// Parameters: dimm_socket_address - SMBus address of DIMM socket to interrogate +// Return Value: dimm_size - log2(number of bits) for each side of the DIMM +// Description: Calculate the log base 2 size in bits of both DIMM sides. +// log2(# bits) = (# columns) + log2(data width) + +// (# rows) + log2(banks per SDRAM) // -// Note that it might be easier to use SPD byte 31 here, it has the -// DIMM size as a multiple of 4MB. The way we do it now we can size -// both sides of an asymmetric dimm. +// Note that it might be easier to use SPD byte 31 here, it has the +// DIMM size as a multiple of 4MB. The way we do it now we can size +// both sides of an asymmetric dimm. // static struct dimm_size spd_get_dimm_size(unsigned dimm_socket_address) { - int value; + int value; // Start with log2(page size) - struct dimm_size sz = sdram_spd_get_page_size(dimm_socket_address); + struct dimm_size sz = sdram_spd_get_page_size(dimm_socket_address); if (sz.side1 > 0) { value = spd_read_byte(dimm_socket_address, SPD_NUM_ROWS); die_on_spd_error(value); - sz.side1 += value & 0xf; + sz.side1 += value & 0xf; if (sz.side2 > 0) { // Double-sided DIMM if (value & 0xF0) - sz.side2 += value >> 4; // Asymmetric + sz.side2 += value >> 4; // Asymmetric else - sz.side2 += value; // Symmetric + sz.side2 += value; // Symmetric } - value = spd_read_byte(dimm_socket_address, SPD_NUM_BANKS_PER_SDRAM); - die_on_spd_error(value); + value = + spd_read_byte(dimm_socket_address, + SPD_NUM_BANKS_PER_SDRAM); + die_on_spd_error(value); value = log2(value); - sz.side1 += value; + sz.side1 += value; if (sz.side2 > 0) - sz.side2 += value; + sz.side2 += value; } return sz; } +#ifdef VALIDATE_DIMM_COMPATIBILITY //---------------------------------------------------------------------------------- -// Function: are_spd_values_equal -// Parameters: spd_byte_number - -// dimmN_address - SMBus addresses of DIMM sockets to interrogate -// Return Value: 1 if both DIMM sockets report the same value for the specified -// SPD parameter; 0 if the values differed or an error occurred. -// Description: Determine whether two DIMMs have the same value for a SPD parameter. +// Function: are_spd_values_equal +// Parameters: spd_byte_number - +// dimmN_address - SMBus addresses of DIMM sockets to interrogate +// Return Value: 1 if both DIMM sockets report the same value for the specified +// SPD parameter; 0 if the values differed or an error occurred. +// Description: Determine whether two DIMMs have the same value for a SPD parameter. // -static uint8_t are_spd_values_equal(uint8_t spd_byte_number, uint16_t dimm0_address, - uint16_t dimm1_address) +static uint8_t are_spd_values_equal(uint8_t spd_byte_number, + uint16_t dimm0_address, + uint16_t dimm1_address) { uint8_t bEqual = 0; int dimm0_value = spd_read_byte(dimm0_address, spd_byte_number); int dimm1_value = spd_read_byte(dimm1_address, spd_byte_number); - if ((dimm0_value >= 0) && (dimm1_value >= 0) && (dimm0_value == dimm1_value)) + if ((dimm0_value >= 0) && (dimm1_value >= 0) + && (dimm0_value == dimm1_value)) bEqual = 1; return bEqual; } +#endif //---------------------------------------------------------------------------------- -// Function: spd_get_supported_dimms -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// Return Value: uint8_t - a bitmask indicating which of the possible sockets -// for each channel was found to contain a compatible DIMM. -// Bit 0 corresponds to the closest socket for channel 0, -// Bit 1 to the next socket for channel 0, -// ... -// Bit MAX_DIMM_SOCKETS_PER_CHANNEL-1 to the last socket for channel 0, -// Bit MAX_DIMM_SOCKETS_PER_CHANNEL is the closest socket for channel 1, -// ... -// Bit 2*MAX_DIMM_SOCKETS_PER_CHANNEL-1 is the last socket for channel 1 -// Description: Scan for compatible DIMMs. -// The code in this module only supports dual-channel operation, -// so we test that compatible DIMMs are paired. +// Function: spd_get_supported_dimms +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// Return Value: uint8_t - a bitmask indicating which of the possible sockets +// for each channel was found to contain a compatible DIMM. +// Bit 0 corresponds to the closest socket for channel 0, +// Bit 1 to the next socket for channel 0, +// ... +// Bit MAX_DIMM_SOCKETS_PER_CHANNEL-1 to the last socket for channel 0, +// Bit MAX_DIMM_SOCKETS_PER_CHANNEL is the closest socket for channel 1, +// ... +// Bit 2*MAX_DIMM_SOCKETS_PER_CHANNEL-1 is the last socket for channel 1 +// Description: Scan for compatible DIMMs. +// The code in this module only supports dual-channel operation, +// so we test that compatible DIMMs are paired. // -static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) +static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) { int i; uint8_t dimm_mask = 0; @@ -686,54 +705,60 @@ static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) // Then see if the corresponding channel 1 DIMM has the same parameters, // since we only support dual-channel. - for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { + for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { - uint16_t channel0_dimm = ctrl->channel0[i]; + uint16_t channel0_dimm = ctrl->channel0[i]; uint16_t channel1_dimm = ctrl->channel1[i]; uint8_t bDualChannel = 1; - struct dimm_size page_size; - struct dimm_size sdram_width; +#ifdef VALIDATE_DIMM_COMPATIBILITY + struct dimm_size page_size; + struct dimm_size sdram_width; +#endif int spd_value; - int j; if (channel0_dimm == 0) - continue; // No such socket on this mainboard + continue; // No such socket on this mainboard - if (spd_read_byte(channel0_dimm, SPD_MEMORY_TYPE) != SPD_MEMORY_TYPE_SDRAM_DDR) + if (spd_read_byte(channel0_dimm, SPD_MEMORY_TYPE) != + SPD_MEMORY_TYPE_SDRAM_DDR) continue; #ifdef VALIDATE_DIMM_COMPATIBILITY - if (spd_read_byte(channel0_dimm, SPD_MODULE_VOLTAGE) != SPD_VOLTAGE_SSTL2) - continue; // Unsupported voltage + if (spd_read_byte(channel0_dimm, SPD_MODULE_VOLTAGE) != + SPD_VOLTAGE_SSTL2) + continue; // Unsupported voltage // E7501 does not support unregistered DIMMs - spd_value = spd_read_byte(channel0_dimm, SPD_MODULE_ATTRIBUTES); + spd_value = + spd_read_byte(channel0_dimm, SPD_MODULE_ATTRIBUTES); if (!(spd_value & MODULE_REGISTERED) || (spd_value < 0)) continue; - - // Must support burst = 4 for dual-channel operation on E7501 + + // Must support burst = 4 for dual-channel operation on E7501 // NOTE: for single-channel, burst = 8 is required - spd_value = spd_read_byte(channel0_dimm, SPD_SUPPORTED_BURST_LENGTHS); + spd_value = + spd_read_byte(channel0_dimm, + SPD_SUPPORTED_BURST_LENGTHS); if (!(spd_value & SPD_BURST_LENGTH_4) || (spd_value < 0)) continue; - page_size = sdram_spd_get_page_size(channel0_dimm); + page_size = sdram_spd_get_page_size(channel0_dimm); sdram_width = sdram_spd_get_width(channel0_dimm); // Validate DIMM page size // The E7501 only supports page sizes of 4, 8, 16, or 32 KB per channel // NOTE: 4 KB = 32 Kb = 2^15 - // 32 KB = 262 Kb = 2^18 + // 32 KB = 262 Kb = 2^18 if ((page_size.side1 < 15) || (page_size.side1 > 18)) continue; // If DIMM is double-sided, verify side2 page size - if (page_size.side2 != 0) { - if ((page_size.side2 < 15) || (page_size.side2 > 18)) + if (page_size.side2 != 0) { + if ((page_size.side2 < 15) + || (page_size.side2 > 18)) continue; } - // Validate SDRAM width // The E7501 only supports x4 and x8 devices @@ -741,31 +766,37 @@ static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) continue; // If DIMM is double-sided, verify side2 width - if (sdram_width.side2 != 0) { - if ((sdram_width.side2 != 4) && (sdram_width.side2 != 8)) + if (sdram_width.side2 != 0) { + if ((sdram_width.side2 != 4) + && (sdram_width.side2 != 8)) continue; } -#endif +#endif // Channel 0 DIMM looks compatible. // Now see if it is paired with the proper DIMM on channel 1. - ASSERT(channel1_dimm != 0); // No such socket on this mainboard?? + ASSERT(channel1_dimm != 0); // No such socket on this mainboard?? // NOTE: unpopulated DIMMs cause read to fail - spd_value = spd_read_byte(channel1_dimm, SPD_MODULE_ATTRIBUTES); + spd_value = + spd_read_byte(channel1_dimm, SPD_MODULE_ATTRIBUTES); if (!(spd_value & MODULE_REGISTERED) || (spd_value < 0)) { - + print_debug("Skipping un-matched DIMMs - only dual-channel operation supported\n"); continue; } - #ifdef VALIDATE_DIMM_COMPATIBILITY - spd_value = spd_read_byte(channel1_dimm, SPD_SUPPORTED_BURST_LENGTHS); + spd_value = + spd_read_byte(channel1_dimm, + SPD_SUPPORTED_BURST_LENGTHS); if (!(spd_value & SPD_BURST_LENGTH_4) || (spd_value < 0)) continue; - for (j=0; j<sizeof(dual_channel_parameters); ++j) { - if (!are_spd_values_equal(dual_channel_parameters[j], channel0_dimm, channel1_dimm)) { + int j; + for (j = 0; j < sizeof(dual_channel_parameters); ++j) { + if (!are_spd_values_equal + (dual_channel_parameters[j], channel0_dimm, + channel1_dimm)) { bDualChannel = 0; break; @@ -777,22 +808,21 @@ static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) #ifdef ROMCC_IF_BUG_FIXED if (bDualChannel) { // Made it through all the checks, this DIMM pair is usable - dimm_mask |= ((1<<i) | (1<<(MAX_DIMM_SOCKETS_PER_CHANNEL + i))); - } - else + dimm_mask |= ((1 << i) | (1 << (MAX_DIMM_SOCKETS_PER_CHANNEL + i))); + } else print_debug("Skipping un-matched DIMMs - only dual-channel operation supported\n"); #else switch (bDualChannel) { case 0: print_debug("Skipping un-matched DIMMs - only dual-channel operation supported\n"); break; - + default: // Made it through all the checks, this DIMM pair is usable - dimm_mask |= (1<<i) | (1<<(MAX_DIMM_SOCKETS_PER_CHANNEL + i)); + dimm_mask |= (1 << i) | (1 << (MAX_DIMM_SOCKETS_PER_CHANNEL + i)); break; } -#endif +#endif } return dimm_mask; @@ -803,32 +833,32 @@ static uint8_t spd_get_supported_dimms(const struct mem_controller *ctrl) /**********************************************************************************/ //---------------------------------------------------------------------------------- -// Function: do_ram_command -// Parameters: -// command - specifies the command to be sent to the DIMMs: -// RAM_COMMAND_NOP - No Operation -// RAM_COMMAND_PRECHARGE - Precharge all banks -// RAM_COMMAND_MRS - Load Mode Register -// RAM_COMMAND_EMRS - Load Extended Mode Register -// RAM_COMMAND_CBR - Auto Refresh ("CAS-before-RAS") -// RAM_COMMAND_NORMAL - Normal operation -// jedec_mode_bits - for mode register set & extended mode register set -// commands, bits 0-12 contain the register value in JEDEC format. -// Return Value: None -// Description: Send the specified command to all DIMMs. +// Function: do_ram_command +// Parameters: +// command - specifies the command to be sent to the DIMMs: +// RAM_COMMAND_NOP - No Operation +// RAM_COMMAND_PRECHARGE - Precharge all banks +// RAM_COMMAND_MRS - Load Mode Register +// RAM_COMMAND_EMRS - Load Extended Mode Register +// RAM_COMMAND_CBR - Auto Refresh ("CAS-before-RAS") +// RAM_COMMAND_NORMAL - Normal operation +// jedec_mode_bits - for mode register set & extended mode register set +// commands, bits 0-12 contain the register value in JEDEC format. +// Return Value: None +// Description: Send the specified command to all DIMMs. // -static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) +static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) { - int i; + int i; uint32_t dram_controller_mode; uint8_t dimm_start_64M_multiple = 0; uint16_t e7501_mode_bits = jedec_mode_bits; // Configure the RAM command - dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); - dram_controller_mode &= 0xFFFFFF8F; - dram_controller_mode |= command; - pci_write_config32(PCI_DEV(0, 0, 0), DRC, dram_controller_mode); + dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); + dram_controller_mode &= 0xFFFFFF8F; + dram_controller_mode |= command; + pci_write_config32(PCI_DEV(0, 0, 0), DRC, dram_controller_mode); // RAM_COMMAND_NORMAL is an exception. // It affects only the memory controller and does not need to be "sent" to the DIMMs. @@ -837,7 +867,7 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) // Send the command to all DIMMs by accessing a memory location within each // NOTE: for mode select commands, some of the location address bits - // are part of the command + // are part of the command // Map JEDEC mode bits to E7501 if (command == RAM_COMMAND_MRS) { @@ -846,8 +876,8 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) ASSERT(!(jedec_mode_bits & 0x0401)); - e7501_mode_bits = ((jedec_mode_bits & 0x1800) << (15-12)) | // JEDEC bits 11-12 move to bits 14-15 - ((jedec_mode_bits & 0x03FE) << (13-9)); // JEDEC bits 1-9 move to bits 5-13 + e7501_mode_bits = ((jedec_mode_bits & 0x1800) << (15 - 12)) | // JEDEC bits 11-12 move to bits 14-15 + ((jedec_mode_bits & 0x03FE) << (13 - 9)); // JEDEC bits 1-9 move to bits 5-13 } else if (command == RAM_COMMAND_EMRS) { // Host address lines [15:3] map to DIMM address lines [12:0] @@ -855,12 +885,12 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) } else ASSERT(jedec_mode_bits == 0); - dimm_start_64M_multiple = 0; for (i = 0; i < (MAX_NUM_CHANNELS * MAX_DIMM_SOCKETS_PER_CHANNEL); ++i) { - uint8_t dimm_end_64M_multiple = pci_read_config8(PCI_DEV(0, 0, 0), DRB_ROW_0 + i); + uint8_t dimm_end_64M_multiple = + pci_read_config8(PCI_DEV(0, 0, 0), DRB_ROW_0 + i); if (dimm_end_64M_multiple > dimm_start_64M_multiple) { // This code assumes DRAM row boundaries are all set below 4 GB @@ -869,34 +899,38 @@ static void do_ram_command(uint8_t command, uint16_t jedec_mode_bits) // NOTE: 2^26 == 64 MB - uint32_t dimm_start_address = dimm_start_64M_multiple << 26; + uint32_t dimm_start_address = + dimm_start_64M_multiple << 26; RAM_DEBUG_MESSAGE(" Sending RAM command to 0x"); RAM_DEBUG_HEX32(dimm_start_address + e7501_mode_bits); RAM_DEBUG_MESSAGE("\n"); + read32(dimm_start_address + e7501_mode_bits); // Set the start of the next DIMM - dimm_start_64M_multiple = dimm_end_64M_multiple; + dimm_start_64M_multiple = + dimm_end_64M_multiple; } } } } //---------------------------------------------------------------------------------- -// Function: set_ram_mode -// Parameters: jedec_mode_bits - for mode register set & extended mode register set -// commands, bits 0-12 contain the register value in JEDEC format. -// Return Value: None -// Description: Set the mode register of all DIMMs. The proper CAS# latency -// setting is added to the mode bits specified by the caller. +// Function: set_ram_mode +// Parameters: jedec_mode_bits - for mode register set & extended mode register set +// commands, bits 0-12 contain the register value in JEDEC format. +// Return Value: None +// Description: Set the mode register of all DIMMs. The proper CAS# latency +// setting is added to the mode bits specified by the caller. // static void set_ram_mode(uint16_t jedec_mode_bits) { ASSERT(!(jedec_mode_bits & SDRAM_CAS_MASK)); - uint32_t dram_cas_latency = pci_read_config32(PCI_DEV(0, 0, 0), DRT) & DRT_CAS_MASK; - + uint32_t dram_cas_latency = + pci_read_config32(PCI_DEV(0, 0, 0), DRT) & DRT_CAS_MASK; + switch (dram_cas_latency) { case DRT_CAS_2_5: jedec_mode_bits |= SDRAM_CAS_2_5; @@ -915,25 +949,22 @@ static void set_ram_mode(uint16_t jedec_mode_bits) } /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ -/* SDRAM CONFIGURATION FUNCTIONS */ +/* SDRAM CONFIGURATION FUNCTIONS */ /**********************************************************************************/ //---------------------------------------------------------------------------------- -// Function: configure_dimm_row_boundaries -// Parameters: -// dimm_log2_num_bits - log2(number of bits) for each side of the DIMM -// total_dram_64M_multiple - total DRAM in the system (as a -// multiple of 64 MB) for DIMMs < dimm_index -// dimm_index - which DIMM pair is being processed -// (0..MAX_DIMM_SOCKETS_PER_CHANNEL) -// Return Value: New multiple of 64 MB total DRAM in the system -// Description: Configure the E7501's DRAM Row Boundary registers for the memory -// present in the specified DIMM. +// Function: configure_dimm_row_boundaries +// Parameters: +// dimm_log2_num_bits - log2(number of bits) for each side of the DIMM +// total_dram_64M_multiple - total DRAM in the system (as a +// multiple of 64 MB) for DIMMs < dimm_index +// dimm_index - which DIMM pair is being processed +// (0..MAX_DIMM_SOCKETS_PER_CHANNEL) +// Return Value: New multiple of 64 MB total DRAM in the system +// Description: Configure the E7501's DRAM Row Boundary registers for the memory +// present in the specified DIMM. // -static uint8_t configure_dimm_row_boundaries( - struct dimm_size dimm_log2_num_bits, - uint8_t total_dram_64M_multiple, - unsigned dimm_index) +static uint8_t configure_dimm_row_boundaries(struct dimm_size dimm_log2_num_bits, uint8_t total_dram_64M_multiple, unsigned dimm_index) { int i; @@ -941,7 +972,8 @@ static uint8_t configure_dimm_row_boundaries( // DIMM sides must be at least 32 MB ASSERT(dimm_log2_num_bits.side1 >= 28); - ASSERT((dimm_log2_num_bits.side2 == 0) || (dimm_log2_num_bits.side2 >= 28)); + ASSERT((dimm_log2_num_bits.side2 == 0) + || (dimm_log2_num_bits.side2 >= 28)); // In dual-channel mode, we are called only once for each pair of DIMMs. // Each time we process twice the capacity of a single DIMM. @@ -951,7 +983,7 @@ static uint8_t configure_dimm_row_boundaries( dimm_log2_num_bits.side1++; if (dimm_log2_num_bits.side2 > 0) dimm_log2_num_bits.side2++; - + // Add the capacity of side 1 this DIMM pair (as a multiple of 64 MB) // to the total capacity of the system // NOTE: 64 MB == 512 Mb, and log2(512 Mb) == 29 @@ -959,76 +991,82 @@ static uint8_t configure_dimm_row_boundaries( total_dram_64M_multiple += (1 << (dimm_log2_num_bits.side1 - 29)); // Configure the boundary address for the row on side 1 - pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_0+(dimm_index<<1), total_dram_64M_multiple); + pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_0 + (dimm_index << 1), + total_dram_64M_multiple); // If the DIMMs are double-sided, add the capacity of side 2 this DIMM pair // (as a multiple of 64 MB) to the total capacity of the system - if (dimm_log2_num_bits.side2 >= 29) - total_dram_64M_multiple += (1 << (dimm_log2_num_bits.side2 - 29)); - + if (dimm_log2_num_bits.side2 >= 29) + total_dram_64M_multiple += + (1 << (dimm_log2_num_bits.side2 - 29)); + // Configure the boundary address for the row (if any) on side 2 - pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_1+(dimm_index<<1), total_dram_64M_multiple); + pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_1 + (dimm_index << 1), + total_dram_64M_multiple); // Update boundaries for rows subsequent to these. // These settings will be overridden by a subsequent call if a populated physical slot exists - - for(i=dimm_index+1; i<MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { - pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_0+(i<<1), total_dram_64M_multiple); - pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_1+(i<<1), total_dram_64M_multiple); + + for (i = dimm_index + 1; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { + pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_0 + (i << 1), + total_dram_64M_multiple); + pci_write_config8(PCI_DEV(0, 0, 0), DRB_ROW_1 + (i << 1), + total_dram_64M_multiple); } - - return total_dram_64M_multiple; + + return total_dram_64M_multiple; } //---------------------------------------------------------------------------------- -// Function: configure_e7501_ram_addresses -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Program the E7501's DRAM row boundary addresses and its Top Of -// Low Memory (TOLM). If necessary, set up a remap window so we -// don't waste DRAM that ordinarily would lie behind addresses -// reserved for memory-mapped I/O. +// Function: configure_e7501_ram_addresses +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Program the E7501's DRAM row boundary addresses and its Top Of +// Low Memory (TOLM). If necessary, set up a remap window so we +// don't waste DRAM that ordinarily would lie behind addresses +// reserved for memory-mapped I/O. // -static void configure_e7501_ram_addresses(const struct mem_controller *ctrl, - uint8_t dimm_mask) +static void configure_e7501_ram_addresses(const struct mem_controller + *ctrl, uint8_t dimm_mask) { int i; - uint8_t total_dram_64M_multiple = 0; + uint8_t total_dram_64M_multiple = 0; // Configure the E7501's DRAM row boundaries // Start by zeroing out the temporary initial configuration pci_write_config32(PCI_DEV(0, 0, 0), DRB_ROW_0, 0); pci_write_config32(PCI_DEV(0, 0, 0), DRB_ROW_4, 0); - for(i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { + for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { - uint16_t dimm_socket_address = ctrl->channel0[i]; + uint16_t dimm_socket_address = ctrl->channel0[i]; struct dimm_size sz; - if (!(dimm_mask & (1 << i))) - continue; // This DIMM not present + if (!(dimm_mask & (1 << i))) + continue; // This DIMM not present - sz = spd_get_dimm_size(dimm_socket_address); + sz = spd_get_dimm_size(dimm_socket_address); - RAM_DEBUG_MESSAGE("dimm size ="); - RAM_DEBUG_HEX32(sz.side1); - RAM_DEBUG_MESSAGE(" "); - RAM_DEBUG_HEX32(sz.side2); - RAM_DEBUG_MESSAGE("\n"); + RAM_DEBUG_MESSAGE("dimm size ="); + RAM_DEBUG_HEX32(sz.side1); + RAM_DEBUG_MESSAGE(" "); + RAM_DEBUG_HEX32(sz.side2); + RAM_DEBUG_MESSAGE("\n"); if (sz.side1 == 0) die("Bad SPD value\n"); - total_dram_64M_multiple = configure_dimm_row_boundaries(sz, total_dram_64M_multiple, i); + total_dram_64M_multiple = + configure_dimm_row_boundaries(sz, total_dram_64M_multiple, i); } // Configure the Top Of Low Memory (TOLM) in the E7501 // This address must be a multiple of 128 MB that is less than 4 GB. // NOTE: 16-bit wide TOLM register stores only the highest 5 bits of a 32-bit address - // in the highest 5 bits. + // in the highest 5 bits. // We set TOLM to the smaller of 0xC0000000 (3 GB) or the total DRAM in the system. // This reserves addresses from 0xC0000000 - 0xFFFFFFFF for non-DRAM purposes @@ -1040,30 +1078,33 @@ static void configure_e7501_ram_addresses(const struct mem_controller *ctrl, // NOTE: 0xC0000000 / (64 MB) == 0x30 - if (total_dram_64M_multiple <= 0x30) { + if (total_dram_64M_multiple <= 0x30) { // <= 3 GB total RAM /* I should really adjust all of this in C after I have resources - * to all of the pci devices. - */ + * to all of the pci devices. + */ // Round up to 128MB granularity // SJM: Is "missing" 64 MB of memory a potential issue? Should this round down? - uint8_t total_dram_128M_multiple = (total_dram_64M_multiple + 1) >> 1; + uint8_t total_dram_128M_multiple = + (total_dram_64M_multiple + 1) >> 1; // Convert to high 16 bits of address - uint16_t top_of_low_memory = total_dram_128M_multiple << 11; + uint16_t top_of_low_memory = + total_dram_128M_multiple << 11; - pci_write_config16(PCI_DEV(0, 0, 0), TOLM, top_of_low_memory); + pci_write_config16(PCI_DEV(0, 0, 0), TOLM, + top_of_low_memory); } else { // > 3 GB total RAM // Set defaults for > 4 GB DRAM, i.e. remap a 1 GB (= 0x10 * 64 MB) range of memory - uint16_t remap_base = total_dram_64M_multiple; // A[25:0] == 0 + uint16_t remap_base = total_dram_64M_multiple; // A[25:0] == 0 uint16_t remap_limit = total_dram_64M_multiple + 0x10 - 1; // A[25:0] == 0xF // Put TOLM at 3 GB @@ -1073,25 +1114,28 @@ static void configure_e7501_ram_addresses(const struct mem_controller *ctrl, // Define a remap window to make the RAM that would appear from 3 GB - 4 GB // visible just beyond 4 GB or the end of physical memory, whichever is larger // NOTE: 16-bit wide REMAP registers store only the highest 10 bits of a 36-bit address, - // (i.e. a multiple of 64 MB) in the lowest 10 bits. + // (i.e. a multiple of 64 MB) in the lowest 10 bits. // NOTE: 0x100000000 / (64 MB) == 0x40 - if (total_dram_64M_multiple < 0x40) { - remap_base = 0x40; // 0x100000000 - remap_limit = 0x40 + (total_dram_64M_multiple - 0x30) - 1; + if (total_dram_64M_multiple < 0x40) { + remap_base = 0x40; // 0x100000000 + remap_limit = + 0x40 + (total_dram_64M_multiple - 0x30) - 1; } - pci_write_config16(PCI_DEV(0, 0, 0), REMAPBASE, remap_base); - pci_write_config16(PCI_DEV(0, 0, 0), REMAPLIMIT, remap_limit); + pci_write_config16(PCI_DEV(0, 0, 0), REMAPBASE, + remap_base); + pci_write_config16(PCI_DEV(0, 0, 0), REMAPLIMIT, + remap_limit); } } //---------------------------------------------------------------------------------- -// Function: initialize_ecc -// Parameters: None -// Return Value: None -// Description: If we're configured to use ECC, initialize the SDRAM and -// clear the E7501's ECC error flags. +// Function: initialize_ecc +// Parameters: None +// Return Value: None +// Description: If we're configured to use ECC, initialize the SDRAM and +// clear the E7501's ECC error flags. // static void initialize_ecc(void) { @@ -1101,145 +1145,156 @@ static void initialize_ecc(void) dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); dram_controller_mode >>= 20; dram_controller_mode &= 3; - if (dram_controller_mode == 2) { - + if (dram_controller_mode == 2) { + uint8_t byte; RAM_DEBUG_MESSAGE("Initializing ECC state...\n"); - /* Initialize ECC bits , use ECC zero mode (new to 7501)*/ + /* Initialize ECC bits , use ECC zero mode (new to 7501) */ pci_write_config8(PCI_DEV(0, 0, 0), MCHCFGNS, 0x06); pci_write_config8(PCI_DEV(0, 0, 0), MCHCFGNS, 0x07); // Wait for scrub cycle to complete do { - byte = pci_read_config8(PCI_DEV(0, 0, 0), MCHCFGNS); - - } while ( (byte & 0x08 ) == 0); + byte = + pci_read_config8(PCI_DEV(0, 0, 0), MCHCFGNS); + } while ((byte & 0x08) == 0); pci_write_config8(PCI_DEV(0, 0, 0), MCHCFGNS, byte & 0xfc); - RAM_DEBUG_MESSAGE("ECC state initialized.\n"); + RAM_DEBUG_MESSAGE("ECC state initialized.\n"); /* Clear the ECC error bits */ pci_write_config8(PCI_DEV(0, 0, 1), DRAM_FERR, 0x03); pci_write_config8(PCI_DEV(0, 0, 1), DRAM_NERR, 0x03); // Clear DRAM Interface error bits (write-one-clear) - pci_write_config32(PCI_DEV(0, 0, 1), FERR_GLOBAL, 1<<18); - pci_write_config32(PCI_DEV(0, 0, 1), NERR_GLOBAL, 1<<18); + pci_write_config32(PCI_DEV(0, 0, 1), FERR_GLOBAL, 1 << 18); + pci_write_config32(PCI_DEV(0, 0, 1), NERR_GLOBAL, 1 << 18); // Start normal ECC scrub pci_write_config8(PCI_DEV(0, 0, 0), MCHCFGNS, 5); } - + } //---------------------------------------------------------------------------------- -// Function: configure_e7501_dram_timing -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Program the DRAM Timing register of the E7501 (except for CAS# -// latency, which is assumed to have been programmed already), based -// on the parameters of the various installed DIMMs. +// Function: configure_e7501_dram_timing +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Program the DRAM Timing register of the E7501 (except for CAS# +// latency, which is assumed to have been programmed already), based +// on the parameters of the various installed DIMMs. // -static void configure_e7501_dram_timing(const struct mem_controller *ctrl, uint8_t dimm_mask) +static void configure_e7501_dram_timing(const struct mem_controller *ctrl, + uint8_t dimm_mask) { int i; - uint32_t dram_timing; - int value; + uint32_t dram_timing; + int value; uint8_t slowest_row_precharge = 0; uint8_t slowest_ras_cas_delay = 0; uint8_t slowest_active_to_precharge_delay = 0; - uint32_t current_cas_latency = pci_read_config32(PCI_DEV(0, 0, 0), DRT) & DRT_CAS_MASK; + uint32_t current_cas_latency = + pci_read_config32(PCI_DEV(0, 0, 0), DRT) & DRT_CAS_MASK; // CAS# latency must be programmed beforehand - ASSERT((current_cas_latency == DRT_CAS_2_0) || (current_cas_latency == DRT_CAS_2_5)); + ASSERT((current_cas_latency == DRT_CAS_2_0) + || (current_cas_latency == DRT_CAS_2_5)); // Each timing parameter is determined by the slowest DIMM for (i = 0; i < MAX_DIMM_SOCKETS; i++) { + uint16_t dimm_socket_address; - uint16_t dimm_socket_address; - if (!(dimm_mask & (1 << i))) - continue; // This DIMM not present + continue; // This DIMM not present if (i < MAX_DIMM_SOCKETS_PER_CHANNEL) dimm_socket_address = ctrl->channel0[i]; else - dimm_socket_address = ctrl->channel1[i - MAX_DIMM_SOCKETS_PER_CHANNEL]; - - value = spd_read_byte(dimm_socket_address, SPD_MIN_ROW_PRECHARGE_TIME); - if (value < 0) goto hw_err; + dimm_socket_address = + ctrl->channel1[i - MAX_DIMM_SOCKETS_PER_CHANNEL]; + + value = + spd_read_byte(dimm_socket_address, + SPD_MIN_ROW_PRECHARGE_TIME); + if (value < 0) + goto hw_err; if (value > slowest_row_precharge) slowest_row_precharge = value; - value = spd_read_byte(dimm_socket_address, SPD_MIN_RAS_TO_CAS_DELAY); - if(value < 0 ) goto hw_err; + value = + spd_read_byte(dimm_socket_address, + SPD_MIN_RAS_TO_CAS_DELAY); + if (value < 0) + goto hw_err; if (value > slowest_ras_cas_delay) slowest_ras_cas_delay = value; - value = spd_read_byte(dimm_socket_address, SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY); - if(value < 0 ) goto hw_err; + value = + spd_read_byte(dimm_socket_address, + SPD_MIN_ACTIVE_TO_PRECHARGE_DELAY); + if (value < 0) + goto hw_err; if (value > slowest_active_to_precharge_delay) slowest_active_to_precharge_delay = value; } // NOTE for timing parameters: - // At 133 MHz, 1 clock == 7.52 ns + // At 133 MHz, 1 clock == 7.52 ns - /* Read the initial state */ - dram_timing = pci_read_config32(PCI_DEV(0, 0, 0), DRT); + /* Read the initial state */ + dram_timing = pci_read_config32(PCI_DEV(0, 0, 0), DRT); /* Trp */ // E7501 supports only 2 or 3 clocks for tRP - if (slowest_row_precharge > ((22<<2) | (2<<0))) - die("unsupported DIMM tRP"); // > 22.5 ns: 4 or more clocks - else if (slowest_row_precharge > (15<<2)) - dram_timing &= ~(1<<0); // > 15.0 ns: 3 clocks + if (slowest_row_precharge > ((22 << 2) | (2 << 0))) + die("unsupported DIMM tRP"); // > 22.5 ns: 4 or more clocks + else if (slowest_row_precharge > (15 << 2)) + dram_timing &= ~(1 << 0); // > 15.0 ns: 3 clocks else - dram_timing |= (1<<0); // <= 15.0 ns: 2 clocks + dram_timing |= (1 << 0); // <= 15.0 ns: 2 clocks /* Trcd */ // E7501 supports only 2 or 3 clocks for tRCD // Use the same value for both read & write - dram_timing &= ~((1<<3)|(3<<1)); - if (slowest_ras_cas_delay > ((22<<2) | (2<<0))) - die("unsupported DIMM tRCD"); // > 22.5 ns: 4 or more clocks - else if (slowest_ras_cas_delay > (15<<2)) - dram_timing |= (2<<1); // > 15.0 ns: 3 clocks + dram_timing &= ~((1 << 3) | (3 << 1)); + if (slowest_ras_cas_delay > ((22 << 2) | (2 << 0))) + die("unsupported DIMM tRCD"); // > 22.5 ns: 4 or more clocks + else if (slowest_ras_cas_delay > (15 << 2)) + dram_timing |= (2 << 1); // > 15.0 ns: 3 clocks else - dram_timing |= ((1<<3) | (3<<1)); // <= 15.0 ns: 2 clocks + dram_timing |= ((1 << 3) | (3 << 1)); // <= 15.0 ns: 2 clocks /* Tras */ // E7501 supports only 5, 6, or 7 clocks for tRAS // 5 clocks ~= 37.6 ns, 6 clocks ~= 45.1 ns, 7 clocks ~= 52.6 ns - dram_timing &= ~(3<<9); + dram_timing &= ~(3 << 9); if (slowest_active_to_precharge_delay > 52) - die("unsupported DIMM tRAS"); // > 52 ns: 8 or more clocks + die("unsupported DIMM tRAS"); // > 52 ns: 8 or more clocks else if (slowest_active_to_precharge_delay > 45) - dram_timing |= (0<<9); // 46-52 ns: 7 clocks + dram_timing |= (0 << 9); // 46-52 ns: 7 clocks else if (slowest_active_to_precharge_delay > 37) - dram_timing |= (1<<9); // 38-45 ns: 6 clocks + dram_timing |= (1 << 9); // 38-45 ns: 6 clocks else - dram_timing |= (2<<9); // < 38 ns: 5 clocks - + dram_timing |= (2 << 9); // < 38 ns: 5 clocks - /* Trd */ + /* Trd */ /* Set to a 7 clock read delay. This is for 133Mhz - * with a CAS latency of 2.5 if 2.0 a 6 clock - * delay is good */ + * with a CAS latency of 2.5 if 2.0 a 6 clock + * delay is good */ - dram_timing &= ~(7<<24); // 7 clocks + dram_timing &= ~(7 << 24); // 7 clocks if (current_cas_latency == DRT_CAS_2_0) - dram_timing |= (1<<24); // 6 clocks + dram_timing |= (1 << 24); // 6 clocks /* * Back to Back Read-Write Turn Around @@ -1247,29 +1302,30 @@ static void configure_e7501_dram_timing(const struct mem_controller *ctrl, uint8 /* Set to a 5 clock back to back read to write turn around. * 4 is a good delay if the CAS latency is 2.0 */ - dram_timing &= ~(1<<28); // 5 clocks + dram_timing &= ~(1 << 28); // 5 clocks if (current_cas_latency == DRT_CAS_2_0) - dram_timing |= (1<<28); // 4 clocks + dram_timing |= (1 << 28); // 4 clocks pci_write_config32(PCI_DEV(0, 0, 0), DRT, dram_timing); return; -hw_err: + hw_err: die(SPD_ERROR); } //---------------------------------------------------------------------------------- -// Function: configure_e7501_cas_latency -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Determine the shortest CAS# latency that the E7501 and all DIMMs -// have in common, and program the E7501 to use it. +// Function: configure_e7501_cas_latency +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Determine the shortest CAS# latency that the E7501 and all DIMMs +// have in common, and program the E7501 to use it. // -static void configure_e7501_cas_latency(const struct mem_controller *ctrl, uint8_t dimm_mask) +static void configure_e7501_cas_latency(const struct mem_controller *ctrl, + uint8_t dimm_mask) { int i; int value; @@ -1279,32 +1335,40 @@ static void configure_e7501_cas_latency(const struct mem_controller *ctrl, uint8 // CAS# latency bitmasks in SPD_ACCEPTABLE_CAS_LATENCIES format // NOTE: E7501 supports only 2.0 and 2.5 - uint32_t system_compatible_cas_latencies = SPD_CAS_LATENCY_2_0 | SPD_CAS_LATENCY_2_5; + uint32_t system_compatible_cas_latencies = + SPD_CAS_LATENCY_2_0 | SPD_CAS_LATENCY_2_5; uint32_t current_cas_latency; uint32_t dimm_compatible_cas_latencies; - + for (i = 0; i < MAX_DIMM_SOCKETS; i++) { - uint16_t dimm_socket_address; + uint16_t dimm_socket_address; if (!(dimm_mask & (1 << i))) - continue; // This DIMM not usable + continue; // This DIMM not usable if (i < MAX_DIMM_SOCKETS_PER_CHANNEL) dimm_socket_address = ctrl->channel0[i]; else - dimm_socket_address = ctrl->channel1[i - MAX_DIMM_SOCKETS_PER_CHANNEL]; + dimm_socket_address = + ctrl->channel1[i - MAX_DIMM_SOCKETS_PER_CHANNEL]; - value = spd_read_byte(dimm_socket_address, SPD_ACCEPTABLE_CAS_LATENCIES); - if (value < 0) goto hw_err; + value = + spd_read_byte(dimm_socket_address, + SPD_ACCEPTABLE_CAS_LATENCIES); + if (value < 0) + goto hw_err; - dimm_compatible_cas_latencies = value & 0x7f; // Start with all supported by DIMM - current_cas_latency = 1 << log2(dimm_compatible_cas_latencies); // Max supported by DIMM + dimm_compatible_cas_latencies = value & 0x7f; // Start with all supported by DIMM + current_cas_latency = 1 << log2(dimm_compatible_cas_latencies); // Max supported by DIMM // Can we support the highest CAS# latency? - value = spd_read_byte(dimm_socket_address, SPD_MIN_CYCLE_TIME_AT_CAS_MAX); - if (value < 0) goto hw_err; + value = + spd_read_byte(dimm_socket_address, + SPD_MIN_CYCLE_TIME_AT_CAS_MAX); + if (value < 0) + goto hw_err; // NOTE: At 133 MHz, 1 clock == 7.52 ns if (value > 0x75) { @@ -1312,30 +1376,36 @@ static void configure_e7501_cas_latency(const struct mem_controller *ctrl, uint8 // Remove it from the bitmask of those supported by the DIMM that are compatible dimm_compatible_cas_latencies &= ~current_cas_latency; } - // Can we support the next-highest CAS# latency (max - 0.5)? current_cas_latency >>= 1; if (current_cas_latency != 0) { - value = spd_read_byte(dimm_socket_address, SPD_SDRAM_CYCLE_TIME_2ND); - if(value < 0 ) goto hw_err; - if(value > 0x75) - dimm_compatible_cas_latencies &= ~current_cas_latency; + value = + spd_read_byte(dimm_socket_address, + SPD_SDRAM_CYCLE_TIME_2ND); + if (value < 0) + goto hw_err; + if (value > 0x75) + dimm_compatible_cas_latencies &= + ~current_cas_latency; } - // Can we support the next-highest CAS# latency (max - 1.0)? current_cas_latency >>= 1; if (current_cas_latency != 0) { - value = spd_read_byte(dimm_socket_address, SPD_SDRAM_CYCLE_TIME_3RD); - if(value < 0 ) goto hw_err; - if(value > 0x75) - dimm_compatible_cas_latencies &= ~current_cas_latency; + value = + spd_read_byte(dimm_socket_address, + SPD_SDRAM_CYCLE_TIME_3RD); + if (value < 0) + goto hw_err; + if (value > 0x75) + dimm_compatible_cas_latencies &= + ~current_cas_latency; } - // Restrict the system to CAS# latencies compatible with this DIMM - system_compatible_cas_latencies &= dimm_compatible_cas_latencies; + system_compatible_cas_latencies &= + dimm_compatible_cas_latencies; - /* go to the next DIMM */ + /* go to the next DIMM */ } /* After all of the arduous calculation setup with the fastest @@ -1345,154 +1415,162 @@ static void configure_e7501_cas_latency(const struct mem_controller *ctrl, uint8 dram_timing = pci_read_config32(PCI_DEV(0, 0, 0), DRT); dram_timing &= ~(DRT_CAS_MASK); - maybe_dram_read_timing = pci_read_config16(PCI_DEV(0, 0, 0), MAYBE_DRDCTL); + maybe_dram_read_timing = + pci_read_config16(PCI_DEV(0, 0, 0), MAYBE_DRDCTL); maybe_dram_read_timing &= 0xF00C; if (system_compatible_cas_latencies & SPD_CAS_LATENCY_2_0) { dram_timing |= DRT_CAS_2_0; maybe_dram_read_timing |= 0xBB1; - } - else if (system_compatible_cas_latencies & SPD_CAS_LATENCY_2_5) { + } else if (system_compatible_cas_latencies & SPD_CAS_LATENCY_2_5) { - uint32_t dram_row_attributes = pci_read_config32(PCI_DEV(0, 0, 0), DRA); + uint32_t dram_row_attributes = + pci_read_config32(PCI_DEV(0, 0, 0), DRA); dram_timing |= DRT_CAS_2_5; // At CAS# 2.5, DRAM Read Timing (if that's what it its) appears to need a slightly // different value if all DIMM slots are populated - if ((dram_row_attributes & 0xff) && (dram_row_attributes & 0xff00) && - (dram_row_attributes & 0xff0000) && (dram_row_attributes & 0xff000000)) { + if ((dram_row_attributes & 0xff) + && (dram_row_attributes & 0xff00) + && (dram_row_attributes & 0xff0000) + && (dram_row_attributes & 0xff000000)) { // All slots populated maybe_dram_read_timing |= 0x0882; - } - else { + } else { // Some unpopulated slots maybe_dram_read_timing |= 0x0662; } - } - else + } else die("No CAS# latencies compatible with all DIMMs!!\n"); pci_write_config32(PCI_DEV(0, 0, 0), DRT, dram_timing); /* set master DLL reset */ dword = pci_read_config32(PCI_DEV(0, 0, 0), 0x88); - dword |= (1<<26); + dword |= (1 << 26); pci_write_config32(PCI_DEV(0, 0, 0), 0x88, dword); - + dword &= 0x0c0007ff; /* patch try register 88 is undocumented tnz */ dword |= 0xd2109800; pci_write_config32(PCI_DEV(0, 0, 0), 0x88, dword); - - pci_write_config16(PCI_DEV(0, 0, 0), MAYBE_DRDCTL, maybe_dram_read_timing); - + pci_write_config16(PCI_DEV(0, 0, 0), MAYBE_DRDCTL, + maybe_dram_read_timing); + dword = pci_read_config32(PCI_DEV(0, 0, 0), 0x88); /* reset master DLL reset */ - dword &= ~(1<<26); + dword &= ~(1 << 26); pci_write_config32(PCI_DEV(0, 0, 0), 0x88, dword); return; -hw_err: + hw_err: die(SPD_ERROR); } //---------------------------------------------------------------------------------- -// Function: configure_e7501_dram_controller_mode -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Configure the refresh interval so that we refresh no more often -// than required by the "most needy" DIMM. Also disable ECC if any -// of the DIMMs don't support it. +// Function: configure_e7501_dram_controller_mode +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Configure the refresh interval so that we refresh no more often +// than required by the "most needy" DIMM. Also disable ECC if any +// of the DIMMs don't support it. // -static void configure_e7501_dram_controller_mode(const struct mem_controller *ctrl, - uint8_t dimm_mask) +static void configure_e7501_dram_controller_mode(const struct + mem_controller *ctrl, + uint8_t dimm_mask) { - int i; + int i; // Initial settings - uint32_t controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); + uint32_t controller_mode = + pci_read_config32(PCI_DEV(0, 0, 0), DRC); uint32_t system_refresh_mode = (controller_mode >> 8) & 7; // Code below assumes that most aggressive settings are in // force when we are called, either via E7501 reset defaults // or by sdram_set_registers(): - // - ECC enabled - // - No refresh + // - ECC enabled + // - No refresh - ASSERT((controller_mode & (3<<20)) == (2<<20)); // ECC - ASSERT(!(controller_mode & (7 << 8))); // Refresh + ASSERT((controller_mode & (3 << 20)) == (2 << 20)); // ECC + ASSERT(!(controller_mode & (7 << 8))); // Refresh - /* Walk through _all_ dimms and find the least-common denominator for: - * - ECC support - * - refresh rates - */ + /* Walk through _all_ dimms and find the least-common denominator for: + * - ECC support + * - refresh rates + */ for (i = 0; i < MAX_DIMM_SOCKETS; i++) { uint32_t dimm_refresh_mode; - int value; - uint16_t dimm_socket_address; + int value; + uint16_t dimm_socket_address; if (!(dimm_mask & (1 << i))) { - continue; // This DIMM not usable - } + continue; // This DIMM not usable + } if (i < MAX_DIMM_SOCKETS_PER_CHANNEL) dimm_socket_address = ctrl->channel0[i]; else - dimm_socket_address = ctrl->channel1[i - MAX_DIMM_SOCKETS_PER_CHANNEL]; + dimm_socket_address = + ctrl->channel1[i - + MAX_DIMM_SOCKETS_PER_CHANNEL]; // Disable ECC mode if any one of the DIMMs does not support ECC // SJM: Should we just die here? E7501 datasheet says non-ECC DIMMs aren't supported. - value = spd_read_byte(dimm_socket_address, SPD_DIMM_CONFIG_TYPE); - die_on_spd_error(value); + value = + spd_read_byte(dimm_socket_address, + SPD_DIMM_CONFIG_TYPE); + die_on_spd_error(value); if (value != ERROR_SCHEME_ECC) { controller_mode &= ~(3 << 20); } value = spd_read_byte(dimm_socket_address, SPD_REFRESH); die_on_spd_error(value); - value &= 0x7f; // Mask off self-refresh bit - if(value > MAX_SPD_REFRESH_RATE) { + value &= 0x7f; // Mask off self-refresh bit + if (value > MAX_SPD_REFRESH_RATE) { print_err("unsupported refresh rate\n"); continue; } - // Get the appropriate E7501 refresh mode for this DIMM dimm_refresh_mode = refresh_rate_map[value]; if (dimm_refresh_mode > 7) { print_err("unsupported refresh rate\n"); continue; } - // If this DIMM requires more frequent refresh than others, // update the system setting - if (refresh_frequency[dimm_refresh_mode] > refresh_frequency[system_refresh_mode]) + if (refresh_frequency[dimm_refresh_mode] > + refresh_frequency[system_refresh_mode]) system_refresh_mode = dimm_refresh_mode; - + #ifdef SUSPICIOUS_LOOKING_CODE // SJM NOTE: This code doesn't look right. SPD values are an order of magnitude smaller -// than the clock period of the memory controller. Also, no other northbridge -// looks at SPD_CMD_SIGNAL_INPUT_HOLD_TIME. +// than the clock period of the memory controller. Also, no other northbridge +// looks at SPD_CMD_SIGNAL_INPUT_HOLD_TIME. // Switch to 2 clocks for address/command if required by any one of the DIMMs // NOTE: At 133 MHz, 1 clock == 7.52 ns - value = spd_read_byte(dimm_socket_address, SPD_CMD_SIGNAL_INPUT_HOLD_TIME); + value = + spd_read_byte(dimm_socket_address, + SPD_CMD_SIGNAL_INPUT_HOLD_TIME); die_on_spd_error(value); - if(value >= 0xa0) { /* At 133MHz this constant should be 0x75 */ - controller_mode &= ~(1<<16); /* Use two clock cyles instead of one */ + if (value >= 0xa0) { /* At 133MHz this constant should be 0x75 */ + controller_mode &= ~(1 << 16); /* Use two clock cyles instead of one */ } #endif - - /* go to the next DIMM */ + + /* go to the next DIMM */ } controller_mode |= (system_refresh_mode << 8); @@ -1502,54 +1580,54 @@ static void configure_e7501_dram_controller_mode(const struct mem_controller *ct } //---------------------------------------------------------------------------------- -// Function: configure_e7501_row_attributes -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Configure the E7501's DRAM Row Attributes (DRA) registers -// based on DIMM parameters read via SPD. This tells the controller -// the width of the SDRAM chips on each DIMM side (x4 or x8) and -// the page size of each DIMM side (4, 8, 16, or 32 KB). +// Function: configure_e7501_row_attributes +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Configure the E7501's DRAM Row Attributes (DRA) registers +// based on DIMM parameters read via SPD. This tells the controller +// the width of the SDRAM chips on each DIMM side (x4 or x8) and +// the page size of each DIMM side (4, 8, 16, or 32 KB). // -static void configure_e7501_row_attributes(const struct mem_controller *ctrl, - uint8_t dimm_mask) +static void configure_e7501_row_attributes(const struct mem_controller + *ctrl, uint8_t dimm_mask) { int i; uint32_t row_attributes = 0; - - for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { - uint16_t dimm_socket_address = ctrl->channel0[i]; - struct dimm_size page_size; - struct dimm_size sdram_width; + for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { + + uint16_t dimm_socket_address = ctrl->channel0[i]; + struct dimm_size page_size; + struct dimm_size sdram_width; if (!(dimm_mask & (1 << i))) - continue; // This DIMM not usable + continue; // This DIMM not usable // Get the relevant parameters via SPD - page_size = sdram_spd_get_page_size(dimm_socket_address); + page_size = sdram_spd_get_page_size(dimm_socket_address); sdram_width = sdram_spd_get_width(dimm_socket_address); // Update the DRAM Row Attributes. // Page size is encoded as log2(page size in bits) - log2(8 Kb) // NOTE: 8 Kb = 2^13 - row_attributes |= (page_size.side1 - 13) << (i<<3); // Side 1 of each DIMM is an EVEN row + row_attributes |= (page_size.side1 - 13) << (i << 3); // Side 1 of each DIMM is an EVEN row if (sdram_width.side2 > 0) - row_attributes |= (page_size.side2 - 13) << ((i<<3) + 4); // Side 2 is ODD + row_attributes |= (page_size.side2 - 13) << ((i << 3) + 4); // Side 2 is ODD // Set x4 flags if appropriate if (sdram_width.side1 == 4) { - row_attributes |= 0x08 << (i<<3); + row_attributes |= 0x08 << (i << 3); } if (sdram_width.side2 == 4) { - row_attributes |= 0x08 << ((i<<3) + 4); - } - - /* go to the next DIMM */ + row_attributes |= 0x08 << ((i << 3) + 4); + } + + /* go to the next DIMM */ } /* Write the new row attributes register */ @@ -1557,12 +1635,12 @@ static void configure_e7501_row_attributes(const struct mem_controller *ctrl, } //---------------------------------------------------------------------------------- -// Function: enable_e7501_clocks -// Parameters: dimm_mask - bitmask of populated DIMMs on the board - see -// spd_get_supported_dimms() -// Return Value: None -// Description: Enable clock signals for populated DIMM sockets and disable them -// for unpopulated sockets (to reduce EMI). +// Function: enable_e7501_clocks +// Parameters: dimm_mask - bitmask of populated DIMMs on the board - see +// spd_get_supported_dimms() +// Return Value: None +// Description: Enable clock signals for populated DIMM sockets and disable them +// for unpopulated sockets (to reduce EMI). // static void enable_e7501_clocks(uint8_t dimm_mask) { @@ -1571,30 +1649,29 @@ static void enable_e7501_clocks(uint8_t dimm_mask) for (i = 0; i < MAX_DIMM_SOCKETS_PER_CHANNEL; i++) { - uint8_t socket_mask = 1 << i; + uint8_t socket_mask = 1 << i; if (dimm_mask & socket_mask) clock_disable &= ~socket_mask; // DIMM present, enable clock else clock_disable |= socket_mask; // DIMM absent, disable clock } - + pci_write_config8(PCI_DEV(0, 0, 0), CKDIS, clock_disable); } - /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ /* DIMM-DEDEPENDENT CONFIGURATION FUNCTIONS */ /**********************************************************************************/ //---------------------------------------------------------------------------------- -// Function: RAM_RESET_DDR_PTR -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// Return Value: None -// Description: DDR Receive FIFO RE-Sync (?) +// Function: RAM_RESET_DDR_PTR +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// Return Value: None +// Description: DDR Receive FIFO RE-Sync (?) // -static void RAM_RESET_DDR_PTR(void) +static void RAM_RESET_DDR_PTR(void) { uint8_t byte; byte = pci_read_config8(PCI_DEV(0, 0, 0), 0x88); @@ -1607,28 +1684,28 @@ static void RAM_RESET_DDR_PTR(void) } //---------------------------------------------------------------------------------- -// Function: ram_set_d0f0_regs -// Parameters: None -// Return Value: None -// Description: Set E7501 registers that are either independent of DIMM specifics, -// or establish default settings that will be overridden when we -// learn the specifics. -// This sets PCI configuration registers to known good values based -// on the table 'constant_register_values', which are a triple of -// configuration register offset, mask, and bits to set. +// Function: ram_set_d0f0_regs +// Parameters: None +// Return Value: None +// Description: Set E7501 registers that are either independent of DIMM specifics, +// or establish default settings that will be overridden when we +// learn the specifics. +// This sets PCI configuration registers to known good values based +// on the table 'constant_register_values', which are a triple of +// configuration register offset, mask, and bits to set. // -static void ram_set_d0f0_regs(void) +static void ram_set_d0f0_regs(void) { int i; int num_values = ARRAY_SIZE(constant_register_values); - ASSERT((num_values % 3) == 0); // Bad table? + ASSERT((num_values % 3) == 0); // Bad table? - for(i = 0; i < num_values; i += 3) { + for (i = 0; i < num_values; i += 3) { uint32_t register_offset = constant_register_values[i]; - uint32_t bits_to_mask = constant_register_values[i+1]; - uint32_t bits_to_set = constant_register_values[i+2]; + uint32_t bits_to_mask = constant_register_values[i + 1]; + uint32_t bits_to_set = constant_register_values[i + 2]; uint32_t register_value; // It's theoretically possible to set values for something other than D0:F0, @@ -1639,25 +1716,27 @@ static void ram_set_d0f0_regs(void) // Again, not strictly an error, but flagged as a potential bug ASSERT((bits_to_mask & bits_to_set) == 0); - register_value = pci_read_config32(PCI_DEV(0, 0, 0), register_offset); - register_value &= bits_to_mask; - register_value |= bits_to_set; + register_value = + pci_read_config32(PCI_DEV(0, 0, 0), register_offset); + register_value &= bits_to_mask; + register_value |= bits_to_set; - pci_write_config32(PCI_DEV(0, 0, 0), register_offset, register_value); - } + pci_write_config32(PCI_DEV(0, 0, 0), register_offset, + register_value); + } } //---------------------------------------------------------------------------------- -// Function: write_8dwords -// Parameters: src_addr -// dst_addr -// Return Value: None -// Description: Copy 64 bytes from one location to another. +// Function: write_8dwords +// Parameters: src_addr +// dst_addr +// Return Value: None +// Description: Copy 64 bytes from one location to another. // -static void write_8dwords(uint32_t* src_addr, uint32_t dst_addr) +static void write_8dwords(const uint32_t * src_addr, uint32_t dst_addr) { int i; - for (i=0; i<8; i++) { + for (i = 0; i < 8; i++) { write32(dst_addr, *src_addr); src_addr++; dst_addr += sizeof(uint32_t); @@ -1665,43 +1744,41 @@ static void write_8dwords(uint32_t* src_addr, uint32_t dst_addr) } //---------------------------------------------------------------------------------- -// Function: ram_set_rcomp_regs -// Parameters: None -// Return Value: None -// Description: Set the E7501's (undocumented) RCOMP registers. -// Per the 855PM datasheet and IXP2800 HW Initialization Reference -// Manual, RCOMP registers appear to affect drive strength, -// pullup/pulldown offset, and slew rate of various signal groups. -// Comments below are conjecture based on apparent similarity -// between the E7501 and these two chips. +// Function: ram_set_rcomp_regs +// Parameters: None +// Return Value: None +// Description: Set the E7501's (undocumented) RCOMP registers. +// Per the 855PM datasheet and IXP2800 HW Initialization Reference +// Manual, RCOMP registers appear to affect drive strength, +// pullup/pulldown offset, and slew rate of various signal groups. +// Comments below are conjecture based on apparent similarity +// between the E7501 and these two chips. // -static void ram_set_rcomp_regs(void) +static void ram_set_rcomp_regs(void) { uint32_t dword; uint8_t maybe_strength_control; RAM_DEBUG_MESSAGE("Setting RCOMP registers.\n"); - /*enable access to the rcomp bar*/ + /*enable access to the rcomp bar */ dword = pci_read_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST); - dword |= (1<<22); - pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST, dword); - + dword |= (1 << 22); + pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST, dword); // Set the RCOMP MMIO base address - pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_SMRBASE, RCOMP_MMIO); + pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_SMRBASE, RCOMP_MMIO); // Block RCOMP updates while we configure the registers dword = read32(RCOMP_MMIO + MAYBE_SMRCTL); - dword |= (1<<9); + dword |= (1 << 9); write32(RCOMP_MMIO + MAYBE_SMRCTL, dword); - /* Begin to write the RCOMP registers */ // Set CMD and DQ/DQS strength to 2x (?) maybe_strength_control = read8(RCOMP_MMIO + MAYBE_DQCMDSTR) & 0x88; - maybe_strength_control |= 0x44; + maybe_strength_control |= 0x44; write8(RCOMP_MMIO + MAYBE_DQCMDSTR, maybe_strength_control); write_8dwords(maybe_2x_slew_table, RCOMP_MMIO + 0x80); @@ -1711,19 +1788,18 @@ static void ram_set_rcomp_regs(void) // NOTE: some factory BIOS set 0x9088 here. Seems to work either way. write16(RCOMP_MMIO + 0x40, 0); - // Set RCVEnOut# strength to 2x (?) maybe_strength_control = read8(RCOMP_MMIO + MAYBE_RCVENSTR) & 0xF8; - maybe_strength_control |= 4; + maybe_strength_control |= 4; write8(RCOMP_MMIO + MAYBE_RCVENSTR, maybe_strength_control); write_8dwords(maybe_2x_slew_table, RCOMP_MMIO + 0x1c0); write16(RCOMP_MMIO + 0x50, 0); - + // Set CS# strength for x4 SDRAM to 2x (?) maybe_strength_control = read8(RCOMP_MMIO + MAYBE_CSBSTR) & 0xF8; - maybe_strength_control |= 4; + maybe_strength_control |= 4; write8(RCOMP_MMIO + MAYBE_CSBSTR, maybe_strength_control); write_8dwords(maybe_2x_slew_table, RCOMP_MMIO + 0x140); @@ -1731,7 +1807,7 @@ static void ram_set_rcomp_regs(void) // Set CKE strength for x4 SDRAM to 2x (?) maybe_strength_control = read8(RCOMP_MMIO + MAYBE_CKESTR) & 0xF8; - maybe_strength_control |= 4; + maybe_strength_control |= 4; write8(RCOMP_MMIO + MAYBE_CKESTR, maybe_strength_control); write_8dwords(maybe_2x_slew_table, RCOMP_MMIO + 0xa0); @@ -1739,7 +1815,7 @@ static void ram_set_rcomp_regs(void) // Set CK strength for x4 SDRAM to 1x (?) maybe_strength_control = read8(RCOMP_MMIO + MAYBE_CKSTR) & 0xF8; - maybe_strength_control |= 1; + maybe_strength_control |= 1; write8(RCOMP_MMIO + MAYBE_CKSTR, maybe_strength_control); write_8dwords(maybe_pull_updown_offset_table, RCOMP_MMIO + 0x180); @@ -1747,12 +1823,11 @@ static void ram_set_rcomp_regs(void) write8(RCOMP_MMIO + 0x2c, 0xff); - // Set the digital filter length to 8 (?) dword = read32(RCOMP_MMIO + MAYBE_SMRCTL); // NOTE: Some factory BIOS don't do this. - // Doesn't seem to matter either way. + // Doesn't seem to matter either way. dword &= ~2; dword |= 1; @@ -1760,25 +1835,25 @@ static void ram_set_rcomp_regs(void) /* Wait 40 usec */ SLOW_DOWN_IO; - + /* unblock updates */ dword = read32(RCOMP_MMIO + MAYBE_SMRCTL); - dword &= ~(1<<9); + dword &= ~(1 << 9); write32(RCOMP_MMIO + MAYBE_SMRCTL, dword); // Force a RCOMP measurement cycle? - dword |= (1<<8); + dword |= (1 << 8); write32(RCOMP_MMIO + MAYBE_SMRCTL, dword); - dword &= ~(1<<8); + dword &= ~(1 << 8); write32(RCOMP_MMIO + MAYBE_SMRCTL, dword); - + /* Wait 40 usec */ SLOW_DOWN_IO; /*disable access to the rcomp bar */ dword = pci_read_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST); - dword &= ~(1<<22); - pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST, dword); + dword &= ~(1 << 22); + pci_write_config32(PCI_DEV(0, 0, 0), MAYBE_MCHTST, dword); } @@ -1787,16 +1862,17 @@ static void ram_set_rcomp_regs(void) /**********************************************************************************/ //---------------------------------------------------------------------------------- -// Function: sdram_enable -// Parameters: controllers - not used -// ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// Return Value: None -// Description: Go through the JEDEC initialization sequence for all DIMMs, -// then enable refresh and initialize ECC and memory to zero. -// Upon exit, SDRAM is up and running. +// Function: sdram_enable +// Parameters: controllers - not used +// ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// Return Value: None +// Description: Go through the JEDEC initialization sequence for all DIMMs, +// then enable refresh and initialize ECC and memory to zero. +// Upon exit, SDRAM is up and running. // -static void sdram_enable(int controllers, const struct mem_controller *ctrl) +static void sdram_enable(int controllers, + const struct mem_controller *ctrl) { uint8_t dimm_mask = pci_read_config16(PCI_DEV(0, 0, 0), SKPD); uint32_t dram_controller_mode; @@ -1809,111 +1885,107 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl) RAM_DEBUG_MESSAGE("Ram Enable 2\n"); /* A 200us delay is needed */ - - DO_DELAY - EXTRA_DELAY + DO_DELAY; EXTRA_DELAY; /* 3. Apply NOP */ RAM_DEBUG_MESSAGE("Ram Enable 3\n"); do_ram_command(RAM_COMMAND_NOP, 0); - EXTRA_DELAY + EXTRA_DELAY; /* 4 Precharge all */ RAM_DEBUG_MESSAGE("Ram Enable 4\n"); do_ram_command(RAM_COMMAND_PRECHARGE, 0); - EXTRA_DELAY - + EXTRA_DELAY; /* wait until the all banks idle state... */ + /* 5. Issue EMRS to enable DLL */ RAM_DEBUG_MESSAGE("Ram Enable 5\n"); - do_ram_command(RAM_COMMAND_EMRS, SDRAM_EXTMODE_DLL_ENABLE | SDRAM_EXTMODE_DRIVE_NORMAL); - EXTRA_DELAY - + do_ram_command(RAM_COMMAND_EMRS, + SDRAM_EXTMODE_DLL_ENABLE | + SDRAM_EXTMODE_DRIVE_NORMAL); + EXTRA_DELAY; + /* 6. Reset DLL */ RAM_DEBUG_MESSAGE("Ram Enable 6\n"); set_ram_mode(E7501_SDRAM_MODE | SDRAM_MODE_DLL_RESET); - EXTRA_DELAY - + EXTRA_DELAY; /* Ensure a 200us delay between the DLL reset in step 6 and the final * mode register set in step 9. * Infineon needs this before any other command is sent to the ram. */ - DO_DELAY - EXTRA_DELAY - + DO_DELAY; EXTRA_DELAY; + /* 7 Precharge all */ RAM_DEBUG_MESSAGE("Ram Enable 7\n"); do_ram_command(RAM_COMMAND_PRECHARGE, 0); - EXTRA_DELAY - + EXTRA_DELAY; + /* 8 Now we need 2 AUTO REFRESH / CBR cycles to be performed */ RAM_DEBUG_MESSAGE("Ram Enable 8\n"); do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; + /* And for good luck 6 more CBRs */ do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; do_ram_command(RAM_COMMAND_CBR, 0); - EXTRA_DELAY + EXTRA_DELAY; /* 9 mode register set */ RAM_DEBUG_MESSAGE("Ram Enable 9\n"); set_ram_mode(E7501_SDRAM_MODE | SDRAM_MODE_NORMAL); - EXTRA_DELAY - + EXTRA_DELAY; + /* 10 DDR Receive FIFO RE-Sync */ RAM_DEBUG_MESSAGE("Ram Enable 10\n"); RAM_RESET_DDR_PTR(); - EXTRA_DELAY - + EXTRA_DELAY; + /* 11 normal operation */ RAM_DEBUG_MESSAGE("Ram Enable 11\n"); do_ram_command(RAM_COMMAND_NORMAL, 0); - EXTRA_DELAY + EXTRA_DELAY; // Reconfigure the row boundaries and Top of Low Memory // to match the true size of the DIMMs configure_e7501_ram_addresses(ctrl, dimm_mask); - /* Finally enable refresh */ + /* Finally enable refresh */ dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); dram_controller_mode |= (1 << 29); pci_write_config32(PCI_DEV(0, 0, 0), DRC, dram_controller_mode); - EXTRA_DELAY - + EXTRA_DELAY; initialize_ecc(); - dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); /* FCS_EN */ - dram_controller_mode |= (1<<17); // NOTE: undocumented reserved bit + dram_controller_mode = pci_read_config32(PCI_DEV(0, 0, 0), DRC); /* FCS_EN */ + dram_controller_mode |= (1 << 17); // NOTE: undocumented reserved bit pci_write_config32(PCI_DEV(0, 0, 0), DRC, dram_controller_mode); RAM_DEBUG_MESSAGE("Northbridge following SDRAM init:\n"); DUMPNORTH(); - -// verify_ram(); } //---------------------------------------------------------------------------------- -// Function: sdram_set_spd_registers -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// Return Value: None -// Description: Configure SDRAM controller parameters that depend on -// characteristics of the DIMMs installed in the system. These -// characteristics are read from the DIMMs via the standard Serial -// Presence Detect (SPD) interface. +// Function: sdram_set_spd_registers +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// Return Value: None +// Description: Configure SDRAM controller parameters that depend on +// characteristics of the DIMMs installed in the system. These +// characteristics are read from the DIMMs via the standard Serial +// Presence Detect (SPD) interface. // -static void sdram_set_spd_registers(const struct mem_controller *ctrl) +static void sdram_set_spd_registers(const struct mem_controller *ctrl) { uint8_t dimm_mask; @@ -1934,29 +2006,30 @@ static void sdram_set_spd_registers(const struct mem_controller *ctrl) RAM_RESET_DDR_PTR(); configure_e7501_dram_timing(ctrl, dimm_mask); - DO_DELAY + DO_DELAY; RAM_DEBUG_MESSAGE("done\n"); } - // NOTE: configure_e7501_ram_addresses() is NOT called here. - // We want to keep the default 64 MB/row mapping until sdram_enable() is called, - // even though the default mapping is almost certainly incorrect. - // The default mapping makes it easy to initialize all of the DIMMs - // even if the total system memory is > 4 GB. - // - // Save the dimm_mask for when sdram_enable is called, so it can call - // configure_e7501_ram_addresses() without having to regenerate the bitmask - // of usable DIMMs. + /* NOTE: configure_e7501_ram_addresses() is NOT called here. + * We want to keep the default 64 MB/row mapping until sdram_enable() is called, + * even though the default mapping is almost certainly incorrect. + * The default mapping makes it easy to initialize all of the DIMMs + * even if the total system memory is > 4 GB. + * + * Save the dimm_mask for when sdram_enable is called, so it can call + * configure_e7501_ram_addresses() without having to regenerate the bitmask + * of usable DIMMs. + */ pci_write_config16(PCI_DEV(0, 0, 0), SKPD, dimm_mask); } //---------------------------------------------------------------------------------- -// Function: sdram_set_registers -// Parameters: ctrl - PCI addresses of memory controller functions, and -// SMBus addresses of DIMM slots on the mainboard -// Return Value: None -// Description: Do basic ram setup that does NOT depend on serial presence detect -// information (i.e. independent of DIMM specifics). +// Function: sdram_set_registers +// Parameters: ctrl - PCI addresses of memory controller functions, and +// SMBus addresses of DIMM slots on the mainboard +// Return Value: None +// Description: Do basic ram setup that does NOT depend on serial presence detect +// information (i.e. independent of DIMM specifics). // static void sdram_set_registers(const struct mem_controller *ctrl) { @@ -1968,5 +2041,5 @@ static void sdram_set_registers(const struct mem_controller *ctrl) } /*^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*/ -/* PUBLIC INTERFACE */ +/* PUBLIC INTERFACE */ /**********************************************************************************/ diff --git a/src/northbridge/intel/e7501/raminit.h b/src/northbridge/intel/e7501/raminit.h index 4f783b8cd7..0d09414904 100644 --- a/src/northbridge/intel/e7501/raminit.h +++ b/src/northbridge/intel/e7501/raminit.h @@ -15,5 +15,8 @@ struct mem_controller { uint16_t channel1[MAX_DIMM_SOCKETS_PER_CHANNEL]; }; +#ifndef __ROMCC__ +void sdram_initialize(int controllers, const struct mem_controller *ctrl); +#endif #endif /* RAMINIT_H */ diff --git a/src/northbridge/intel/i82830/northbridge.c b/src/northbridge/intel/i82830/northbridge.c index aff13838d4..eb21b7cbb7 100644 --- a/src/northbridge/intel/i82830/northbridge.c +++ b/src/northbridge/intel/i82830/northbridge.c @@ -29,7 +29,6 @@ #include <string.h> #include <bitops.h> #include <boot/tables.h> -#include <arch/coreboot_tables.h> #include "chip.h" #include "i82830.h" diff --git a/src/northbridge/intel/i945/northbridge.c b/src/northbridge/intel/i945/northbridge.c index 1f5a0359c4..0812460cfe 100644 --- a/src/northbridge/intel/i945/northbridge.c +++ b/src/northbridge/intel/i945/northbridge.c @@ -31,7 +31,6 @@ #include <boot/tables.h> #include "chip.h" #include "i945.h" -#include <arch/coreboot_tables.h> static int get_pcie_bar(u32 *base, u32 *len) { |