From 3cf94032bced9345f4b9d71b7d2becab4dfcd530 Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Wed, 5 Apr 2017 16:17:26 +0200 Subject: nb/x4x/raminit: Rewrite SPD decode and timing selection This is mostly written from scratch and uses common spd ddr2 decode functions. This improves the following: * This fixes incorrect CAS/Freq detection on DDR2; * Fixes tRFC computation; tRFC == 78 is a valid timing which is excluded and 0 ends up being used; (TESTED) * Timings selection does not use loops; * Removes ddr3 spd decode and is re-added in follow-up patches using common ddr3 spd functions; * Raminit would bail out if a dimm was unsupported, now in some cases it just marks the dimm slot as empty; * It dramatically reduces stack usage since it does not allocate 4 times 256 bytes to store full SPDs, amongs other unused things that were stored in sysinfo; * Reports when no dimms are present; * Uses i2c block read to read SPD which is about 5 times faster than bytewise read, with a fallback to smbus mode in case of failure, which does seem to happen when the system is forcefully powered off. Change-Id: I760eeaa3bd4f2bc25a517ddb1b9533c971454071 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/19143 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/northbridge/intel/x4x/raminit.c | 478 +++++++++++++++++-------------- src/northbridge/intel/x4x/raminit_ddr2.c | 124 +------- src/northbridge/intel/x4x/x4x.h | 31 +- 3 files changed, 271 insertions(+), 362 deletions(-) (limited to 'src') diff --git a/src/northbridge/intel/x4x/raminit.c b/src/northbridge/intel/x4x/raminit.c index dc64c51ffc..cd786bb266 100644 --- a/src/northbridge/intel/x4x/raminit.c +++ b/src/northbridge/intel/x4x/raminit.c @@ -32,150 +32,71 @@ #include #include #include +#include static inline int spd_read_byte(unsigned int device, unsigned int address) { return smbus_read_byte(device, address); } -static void sdram_read_spds(struct sysinfo *s) +struct abs_timings { + u32 min_tclk; + u32 min_tRAS; + u32 min_tRP; + u32 min_tRCD; + u32 min_tWR; + u32 min_tRFC; + u32 min_tWTR; + u32 min_tRRD; + u32 min_tRTP; + u32 min_tCLK_cas[8]; + u32 cas_supported; +}; + +#define CTRL_MIN_TCLK_DDR2 TCK_400MHZ + +static void select_cas_dramfreq_ddr2(struct sysinfo *s, + const struct abs_timings *saved_timings) { - u8 i, j, chan; - int status = 0; - FOR_EACH_DIMM(i) { - if (s->spd_map[i] == 0) { - /* Non-existent SPD address */ - s->dimms[i].card_type = RAW_CARD_UNPOPULATED; - continue; - } - for (j = 0; j < 64; j++) { - status = spd_read_byte(s->spd_map[i], j); - if (status < 0) { - /* No SPD here */ - s->dimms[i].card_type = RAW_CARD_UNPOPULATED; - break; - } - s->dimms[i].spd_data[j] = (u8) status; - if (j == 62) - s->dimms[i].card_type = ((u8) status) & 0x1f; - } - - if (status >= 0) { - if (IS_ENABLED(CONFIG_DEBUG_RAM_SETUP)) - hexdump(s->dimms[i].spd_data, 64); - } - } - - s->spd_type = 0; - int fail = 1; - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - switch ((enum ddrxspd) s->dimms[i].spd_data[2]) { - case DDR2SPD: - if (s->spd_type == 0) - s->spd_type = DDR2; - else if (s->spd_type == DDR3) - die("DIMM type mismatch\n"); - break; - case DDR3SPD: - default: - if (s->spd_type == 0) - s->spd_type = DDR3; - else if (s->spd_type == DDR2) - die("DIMM type mismatch\n"); + u8 try_cas; + /* Currently only these CAS are supported */ + u8 cas_mask = SPD_CAS_LATENCY_DDR2_5 | SPD_CAS_LATENCY_DDR2_6; + + cas_mask &= saved_timings->cas_supported; + try_cas = spd_get_msbs(cas_mask); + + while (cas_mask & (1 << try_cas) && try_cas > 0) { + s->selected_timings.CAS = try_cas; + s->selected_timings.tclk = saved_timings->min_tCLK_cas[try_cas]; + if (s->selected_timings.tclk >= CTRL_MIN_TCLK_DDR2 && + saved_timings->min_tCLK_cas[try_cas] != + saved_timings->min_tCLK_cas[try_cas - 1]) break; - } + try_cas--; } - if (s->spd_type == DDR3) { - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - s->dimms[i].sides = (s->dimms[i].spd_data[5] & 0x0f) + 1; - s->dimms[i].ranks = ((s->dimms[i].spd_data[7] >> 3) & 0x7) + 1; - s->dimms[i].chip_capacity = (s->dimms[i].spd_data[4] & 0xf); - s->dimms[i].banks = 8; - s->dimms[i].rows = ((s->dimms[i].spd_data[5] >> 3) & 0x7) + 12; - s->dimms[i].cols = (s->dimms[i].spd_data[5] & 0x7) + 9; - s->dimms[i].cas_latencies = 0xfe; - s->dimms[i].cas_latencies &= (s->dimms[i].spd_data[14] << 1); - if (s->dimms[i].cas_latencies == 0) - s->dimms[i].cas_latencies = 0x40; - s->dimms[i].tAAmin = s->dimms[i].spd_data[16]; - s->dimms[i].tCKmin = s->dimms[i].spd_data[12]; - s->dimms[i].width = s->dimms[i].spd_data[7] & 0x7; - s->dimms[i].page_size = s->dimms[i].width * (1 << s->dimms[i].cols); // Bytes - s->dimms[i].tRAS = ((s->dimms[i].spd_data[21] & 0xf) << 8) | - s->dimms[i].spd_data[22]; - s->dimms[i].tRP = s->dimms[i].spd_data[20]; - s->dimms[i].tRCD = s->dimms[i].spd_data[18]; - s->dimms[i].tWR = s->dimms[i].spd_data[17]; - fail = 0; - } - } else if (s->spd_type == DDR2) { - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - s->dimms[i].sides = (s->dimms[i].spd_data[5] & 0x7) + 1; - s->dimms[i].banks = (s->dimms[i].spd_data[17] >> 2) - 1; - s->dimms[i].chip_capacity = s->dimms[i].banks; - s->dimms[i].rows = s->dimms[i].spd_data[3];// - 12; - s->dimms[i].cols = s->dimms[i].spd_data[4];// - 9; - s->dimms[i].cas_latencies = s->dimms[i].spd_data[18]; - if (s->dimms[i].cas_latencies == 0) - s->dimms[i].cas_latencies = 0x60; // 6,5 CL - s->dimms[i].tAAmin = s->dimms[i].spd_data[26]; - s->dimms[i].tCKmin = s->dimms[i].spd_data[25]; - s->dimms[i].width = (s->dimms[i].spd_data[13] >> 3) - 1; - s->dimms[i].page_size = (s->dimms[i].width+1) * (1 << s->dimms[i].cols); // Bytes - s->dimms[i].tRAS = s->dimms[i].spd_data[30]; - s->dimms[i].tRP = s->dimms[i].spd_data[27]; - s->dimms[i].tRCD = s->dimms[i].spd_data[29]; - s->dimms[i].tWR = s->dimms[i].spd_data[36]; - s->dimms[i].ranks = s->dimms[i].sides; // XXX - - printk(BIOS_DEBUG, "DIMM %d\n", i); - printk(BIOS_DEBUG, " Sides : %d\n", s->dimms[i].sides); - printk(BIOS_DEBUG, " Banks : %d\n", s->dimms[i].banks); - printk(BIOS_DEBUG, " Ranks : %d\n", s->dimms[i].ranks); - printk(BIOS_DEBUG, " Rows : %d\n", s->dimms[i].rows); - printk(BIOS_DEBUG, " Cols : %d\n", s->dimms[i].cols); - printk(BIOS_DEBUG, " Page size : %d\n", s->dimms[i].page_size); - printk(BIOS_DEBUG, " Width : %d\n", (s->dimms[i].width+1)*8); - fail = 0; - } - } - if (fail) - die("No memory dimms, halt\n"); - FOR_EACH_POPULATED_CHANNEL(s->dimms, chan) { - FOR_EACH_POPULATED_DIMM_IN_CHANNEL(s->dimms, chan, i) { - int dimm_config; - if (s->dimms[i].ranks == 1) { - if (s->dimms[i].width == 0) /* x8 */ - dimm_config = 1; - else /* x16 */ - dimm_config = 3; - } else { - if (s->dimms[i].width == 0) /* x8 */ - dimm_config = 2; - else - die("Dual-rank x16 not supported\n"); - } - s->dimm_config[chan] |= - dimm_config << (i % DIMMS_PER_CHANNEL) * 2; - } - printk(BIOS_DEBUG, " Config[CH%d] : %d\n", chan, s->dimm_config[chan]); - } -} -static u8 msbpos(u8 val) //Reverse -{ - u8 i; - for (i = 7; (i >= 0) && ((val & (1 << i)) == 0); i--) - ; - return i; + if ((s->selected_timings.CAS < 3) || (s->selected_timings.tclk == 0)) + die("Could not find common memory frequency and CAS\n"); + + switch (s->selected_timings.tclk) { + case TCK_200MHZ: + case TCK_266MHZ: + /* FIXME: this works on vendor BIOS */ + die("Selected dram frequency not supported\n"); + case TCK_333MHZ: + s->selected_timings.mem_clk = MEM_CLOCK_667MHz; + break; + case TCK_400MHZ: + s->selected_timings.mem_clk = MEM_CLOCK_800MHz; + break; + } } static void mchinfo_ddr2(struct sysinfo *s) { const u32 eax = cpuid_ext(0x04, 0).eax; - s->cores = ((eax >> 26) & 0x3f) + 1; - printk(BIOS_WARNING, "%d CPU cores\n", s->cores); + printk(BIOS_WARNING, "%d CPU cores\n", ((eax >> 26) & 0x3f) + 1); u32 capid = pci_read_config16(PCI_DEV(0, 0, 0), 0xe8); if (!(capid & (1<<(79-64)))) @@ -195,21 +116,126 @@ static void mchinfo_ddr2(struct sysinfo *s) printk(BIOS_WARNING, "VT-d enabled\n"); } -static void sdram_detect_ram_speed(struct sysinfo *s) +static int ddr2_save_dimminfo(u8 dimm_idx, u8 *raw_spd, + struct abs_timings *saved_timings, struct sysinfo *s) +{ + struct dimm_attr_st decoded_dimm; + int i; + + if (spd_decode_ddr2(&decoded_dimm, raw_spd) != SPD_STATUS_OK) { + printk(BIOS_DEBUG, "Problems decoding SPD\n"); + return CB_ERR; + } + + if (IS_ENABLED(CONFIG_DEBUG_RAM_SETUP)) + dram_print_spd_ddr2(&decoded_dimm); + + if (!(decoded_dimm.width & (0x08 | 0x10))) { + + printk(BIOS_ERR, + "DIMM%d Unsupported width: x%d. Disabling dimm\n", + dimm_idx, s->dimms[dimm_idx].width); + return CB_ERR; + } + s->dimms[dimm_idx].width = (decoded_dimm.width >> 3) - 1; + /* + * This boils down to: + * "Except for the x16 configuration, all DDR2 devices have a + * 1KB page size. For the x16 configuration, the page size is 2KB + * for all densities except the 256Mb device, which has a 1KB page + * size." Micron, 'TN-47-16 Designing for High-Density DDR2 Memory' + */ + s->dimms[dimm_idx].page_size = s->dimms[dimm_idx].width * + (1 << decoded_dimm.col_bits); + + switch (decoded_dimm.banks) { + case 4: + s->dimms[dimm_idx].n_banks = N_BANKS_4; + break; + case 8: + s->dimms[dimm_idx].n_banks = N_BANKS_8; + break; + default: + printk(BIOS_ERR, + "DIMM%d Unsupported #banks: x%d. Disabling dimm\n", + dimm_idx, decoded_dimm.banks); + return CB_ERR; + } + + s->dimms[dimm_idx].ranks = decoded_dimm.ranks; + s->dimms[dimm_idx].rows = decoded_dimm.row_bits; + s->dimms[dimm_idx].cols = decoded_dimm.col_bits; + + saved_timings->cas_supported &= decoded_dimm.cas_supported; + + saved_timings->min_tRAS = + MAX(saved_timings->min_tRAS, decoded_dimm.tRAS); + saved_timings->min_tRP = + MAX(saved_timings->min_tRP, decoded_dimm.tRP); + saved_timings->min_tRCD = + MAX(saved_timings->min_tRCD, decoded_dimm.tRCD); + saved_timings->min_tWR = + MAX(saved_timings->min_tWR, decoded_dimm.tWR); + saved_timings->min_tRFC = + MAX(saved_timings->min_tRFC, decoded_dimm.tRFC); + saved_timings->min_tWTR = + MAX(saved_timings->min_tWTR, decoded_dimm.tWTR); + saved_timings->min_tRRD = + MAX(saved_timings->min_tRRD, decoded_dimm.tRRD); + saved_timings->min_tRTP = + MAX(saved_timings->min_tRTP, decoded_dimm.tRTP); + for (i = 0; i < 8; i++) { + if (!(saved_timings->cas_supported & (1 << i))) + saved_timings->min_tCLK_cas[i] = 0; + else + saved_timings->min_tCLK_cas[i] = + MAX(saved_timings->min_tCLK_cas[i], + decoded_dimm.cycle_time[i]); + } + return CB_SUCCESS; +} + +static void select_discrete_timings(struct sysinfo *s, + const struct abs_timings *timings) +{ + s->selected_timings.tRAS = DIV_ROUND_UP(timings->min_tRAS, + s->selected_timings.tclk); + s->selected_timings.tRP = DIV_ROUND_UP(timings->min_tRP, + s->selected_timings.tclk); + s->selected_timings.tRCD = DIV_ROUND_UP(timings->min_tRCD, + s->selected_timings.tclk); + s->selected_timings.tWR = DIV_ROUND_UP(timings->min_tWR, + s->selected_timings.tclk); + s->selected_timings.tRFC = DIV_ROUND_UP(timings->min_tRFC, + s->selected_timings.tclk); + s->selected_timings.tWTR = DIV_ROUND_UP(timings->min_tWTR, + s->selected_timings.tclk); + s->selected_timings.tRRD = DIV_ROUND_UP(timings->min_tRRD, + s->selected_timings.tclk); + s->selected_timings.tRTP = DIV_ROUND_UP(timings->min_tRTP, + s->selected_timings.tclk); +} +static void print_selected_timings(struct sysinfo *s) +{ + printk(BIOS_DEBUG, "Selected timings:\n"); + printk(BIOS_DEBUG, "\tFSB: %dMHz\n", + fsb2mhz(s->selected_timings.fsb_clk)); + printk(BIOS_DEBUG, "\tDDR: %dMHz\n", + ddr2mhz(s->selected_timings.mem_clk)); + + printk(BIOS_DEBUG, "\tCAS: %d\n", s->selected_timings.CAS); + printk(BIOS_DEBUG, "\ttRAS: %d\n", s->selected_timings.tRAS); + printk(BIOS_DEBUG, "\ttRP: %d\n", s->selected_timings.tRP); + printk(BIOS_DEBUG, "\ttRCD: %d\n", s->selected_timings.tRCD); + printk(BIOS_DEBUG, "\ttWR: %d\n", s->selected_timings.tWR); + printk(BIOS_DEBUG, "\ttRFC: %d\n", s->selected_timings.tRFC); + printk(BIOS_DEBUG, "\ttWTR: %d\n", s->selected_timings.tWTR); + printk(BIOS_DEBUG, "\ttRRD: %d\n", s->selected_timings.tRRD); + printk(BIOS_DEBUG, "\ttRTP: %d\n", s->selected_timings.tRTP); +} + +static void find_fsb_speed(struct sysinfo *s) { - u8 i; - u8 commoncas = 0; - u8 currcas; - u8 currfreq; - u8 maxfreq; - u8 freq = 0; - - // spdidx,cycletime @CAS 5 6 - u8 idx800[7][2] = {{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {23, 0x30}, - {9, 0x25} }; - int found = 0; - - // Find max FSB speed switch (MCHBAR32(0xc00) & 0x7) { case 0x0: s->max_fsb = FSB_CLOCK_1066MHz; @@ -225,88 +251,98 @@ static void sdram_detect_ram_speed(struct sysinfo *s) printk(BIOS_WARNING, "Can't detect FSB, setting 800MHz\n"); break; } + s->selected_timings.fsb_clk = s->max_fsb; +} - // Max RAM speed - if (s->spd_type == DDR2) { - - maxfreq = MEM_CLOCK_800MHz; - - // Choose common CAS latency from {6,5}, 4 does not work - commoncas = 0x60; +static void decode_spd_select_timings(struct sysinfo *s) +{ + unsigned int device; + u8 dram_type_mask = (1 << DDR2) | (1 << DDR3); + u8 dimm_mask = 0; + u8 raw_spd[256]; + int i, j; + struct abs_timings saved_timings; + memset(&saved_timings, 0, sizeof(saved_timings)); + saved_timings.cas_supported = UINT32_MAX; - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - commoncas &= s->dimms[i].cas_latencies; + FOR_EACH_DIMM(i) { + s->dimms[i].card_type = RAW_CARD_POPULATED; + device = s->spd_map[i]; + if (!device) { + s->dimms[i].card_type = RAW_CARD_UNPOPULATED; + continue; } - if (commoncas == 0) - die("No common CAS among dimms\n"); - - // Working from fastest to slowest, - // fast->slow 5@800 6@800 5@667 - found = 0; - for (currcas = 5; currcas <= msbpos(commoncas); currcas++) { - currfreq = maxfreq; - if (currfreq == MEM_CLOCK_800MHz) { - found = 1; - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - if (s->dimms[i].spd_data[idx800[currcas][0]] > idx800[currcas][1]) { - // this is too fast - found = 0; - } - } - if (found) - break; - } + switch (spd_read_byte(s->spd_map[i], SPD_MEMORY_TYPE)) { + case DDR2SPD: + dram_type_mask &= 1 << DDR2; + s->spd_type = DDR2; + break; + case DDR3SPD: + dram_type_mask &= 1 << DDR3; + s->spd_type = DDR3; + break; + default: + s->dimms[i].card_type = RAW_CARD_UNPOPULATED; + continue; } + if (!dram_type_mask) + die("Mixing up dimm types is not supported!\n"); - if (!found) { - currcas = 5; - currfreq = MEM_CLOCK_667MHz; - found = 1; - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - if (s->dimms[i].spd_data[9] > 0x30) { - // this is too fast - found = 0; - } + printk(BIOS_DEBUG, "Decoding dimm %d\n", i); + if (s->spd_type == DDR2){ + printk(BIOS_DEBUG, + "Reading SPD using i2c block operation.\n"); + if (i2c_block_read(device, 0, 64, raw_spd) != 64) { + printk(BIOS_DEBUG, "i2c block operation failed," + " trying smbus byte operation.\n"); + for (j = 0; j < 64; j++) + raw_spd[j] = spd_read_byte(device, j); + } + if (ddr2_save_dimminfo(i, raw_spd, &saved_timings, s)) { + printk(BIOS_WARNING, + "Encountered problems with SPD, " + "skipping this DIMM.\n"); + s->dimms[i].card_type = RAW_CARD_UNPOPULATED; + continue; } + } else { /* DDR3: not implemented so don't decode */ + die("DDR3 support is not implemented\n"); } + dimm_mask |= (1 << i); + } + if (!dimm_mask) + die("No memory installed.\n"); - if (!found) - die("No valid CAS/frequencies detected\n"); - - s->selected_timings.mem_clk = currfreq; - s->selected_timings.CAS = currcas; - - } else { // DDR3 - // Limit frequency for MCH - maxfreq = (s->max_ddr2_mhz == 800) ? MEM_CLOCK_800MHz : MEM_CLOCK_667MHz; - maxfreq >>= 3; - freq = MEM_CLOCK_1333MHz; - if (maxfreq) - freq = maxfreq + 2; - if (freq > MEM_CLOCK_1333MHz) - freq = MEM_CLOCK_1333MHz; - - // Limit DDR speed to FSB speed - switch (s->max_fsb) { - case FSB_CLOCK_800MHz: - if (freq > MEM_CLOCK_800MHz) - freq = MEM_CLOCK_800MHz; - break; - case FSB_CLOCK_1066MHz: - if (freq > MEM_CLOCK_1066MHz) - freq = MEM_CLOCK_1066MHz; - break; - case FSB_CLOCK_1333MHz: - if (freq > MEM_CLOCK_1333MHz) - freq = MEM_CLOCK_1333MHz; - break; - default: - die("Invalid FSB\n"); - break; - } + if (s->spd_type == DDR2) + select_cas_dramfreq_ddr2(s, &saved_timings); + select_discrete_timings(s, &saved_timings); +} + +static void find_dimm_config(struct sysinfo *s) +{ + int chan, i; - // TODO: CAS detection for DDR3 + FOR_EACH_POPULATED_CHANNEL(s->dimms, chan) { + FOR_EACH_POPULATED_DIMM_IN_CHANNEL(s->dimms, chan, i) { + int dimm_config; + if (s->dimms[i].ranks == 1) { + if (s->dimms[i].width == 0) /* x8 */ + dimm_config = 1; + else /* x16 */ + dimm_config = 3; + } else { + if (s->dimms[i].width == 0) /* x8 */ + dimm_config = 2; + else + die("Dual-rank x16 not supported\n"); + } + s->dimm_config[chan] |= + dimm_config << (i % DIMMS_PER_CHANNEL) * 2; + } + printk(BIOS_DEBUG, " Config[CH%d] : %d\n", chan, + s->dimm_config[chan]); } + } static void checkreset_ddr2(int boot_path) @@ -367,19 +403,15 @@ void sdram_initialize(int boot_path, const u8 *spd_map) checkreset_ddr2(s.boot_path); /* Detect dimms per channel */ - s.dimms_per_ch = 2; reg8 = pci_read_config8(PCI_DEV(0, 0, 0), 0xe9); - if (reg8 & 0x10) - s.dimms_per_ch = 1; - - printk(BIOS_DEBUG, "Dimms per channel: %d\n", s.dimms_per_ch); + printk(BIOS_DEBUG, "Dimms per channel: %d\n", (reg8 & 0x10) ? 1 : 2); mchinfo_ddr2(&s); - sdram_read_spds(&s); - - /* Choose Common Frequency */ - sdram_detect_ram_speed(&s); + find_fsb_speed(&s); + decode_spd_select_timings(&s); + print_selected_timings(&s); + find_dimm_config(&s); switch (s.spd_type) { case DDR2: diff --git a/src/northbridge/intel/x4x/raminit_ddr2.c b/src/northbridge/intel/x4x/raminit_ddr2.c index 02c7fee475..e6ba2dcef8 100644 --- a/src/northbridge/intel/x4x/raminit_ddr2.c +++ b/src/northbridge/intel/x4x/raminit_ddr2.c @@ -31,12 +31,12 @@ #define ME_UMA_SIZEMB 0 -static u32 fsb2mhz(u32 speed) +u32 fsb2mhz(u32 speed) { return (speed * 267) + 800; } -static u32 ddr2mhz(u32 speed) +u32 ddr2mhz(u32 speed) { static const u16 mhz[] = { 0, 0, 667, 800, 1067, 1333 }; @@ -64,113 +64,6 @@ static u8 msbpos(u32 val) return (u8)(pos & 0xff); } -static void sdram_detect_smallest_params2(struct sysinfo *s) -{ - u16 mult[6] = { - 5000, // 400 - 3750, // 533 - 3000, // 667 - 2500, // 800 - 1875, // 1066 - 1500, // 1333 - }; - - u8 i; - u32 tmp; - u32 maxtras = 0; - u32 maxtrp = 0; - u32 maxtrcd = 0; - u32 maxtwr = 0; - u32 maxtrfc = 0; - u32 maxtwtr = 0; - u32 maxtrrd = 0; - u32 maxtrtp = 0; - - FOR_EACH_POPULATED_DIMM(s->dimms, i) { - maxtras = MAX(maxtras, s->dimms[i].spd_data[30] * 1000); - maxtrp = MAX(maxtrp, (s->dimms[i].spd_data[27] * 1000) >> 2); - maxtrcd = MAX(maxtrcd, (s->dimms[i].spd_data[29] * 1000) >> 2); - maxtwr = MAX(maxtwr, (s->dimms[i].spd_data[36] * 1000) >> 2); - maxtrfc = MAX(maxtrfc, s->dimms[i].spd_data[42] * 1000 + - (s->dimms[i].spd_data[40] & 0xf)); - maxtwtr = MAX(maxtwtr, (s->dimms[i].spd_data[37] * 1000) >> 2); - maxtrrd = MAX(maxtrrd, (s->dimms[i].spd_data[28] * 1000) >> 2); - maxtrtp = MAX(maxtrtp, (s->dimms[i].spd_data[38] * 1000) >> 2); - } - for (i = 9; i < 24; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtras) { - s->selected_timings.tRAS = i; - break; - } - } - for (i = 3; i < 10; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtrp) { - s->selected_timings.tRP = i; - break; - } - } - for (i = 3; i < 10; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtrcd) { - s->selected_timings.tRCD = i; - break; - } - } - for (i = 3; i < 15; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtwr) { - s->selected_timings.tWR = i; - break; - } - } - for (i = 15; i < 78; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtrfc) { - s->selected_timings.tRFC = ((i + 16) & 0xfe) - 15; - break; - } - } - for (i = 4; i < 15; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtwtr) { - s->selected_timings.tWTR = i; - break; - } - } - for (i = 2; i < 15; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtrrd) { - s->selected_timings.tRRD = i; - break; - } - } - for (i = 4; i < 15; i++) { - tmp = mult[s->selected_timings.mem_clk] * i; - if (tmp >= maxtrtp) { - s->selected_timings.tRTP = i; - break; - } - } - - s->selected_timings.fsb_clk = s->max_fsb; - - printk(BIOS_DEBUG, "Selected timings:\n"); - printk(BIOS_DEBUG, "\tFSB: %dMHz\n", fsb2mhz(s->selected_timings.fsb_clk)); - printk(BIOS_DEBUG, "\tDDR: %dMHz\n", ddr2mhz(s->selected_timings.mem_clk)); - - printk(BIOS_DEBUG, "\tCAS: %d\n", s->selected_timings.CAS); - printk(BIOS_DEBUG, "\ttRAS: %d\n", s->selected_timings.tRAS); - printk(BIOS_DEBUG, "\ttRP: %d\n", s->selected_timings.tRP); - printk(BIOS_DEBUG, "\ttRCD: %d\n", s->selected_timings.tRCD); - printk(BIOS_DEBUG, "\ttWR: %d\n", s->selected_timings.tWR); - printk(BIOS_DEBUG, "\ttRFC: %d\n", s->selected_timings.tRFC); - printk(BIOS_DEBUG, "\ttWTR: %d\n", s->selected_timings.tWTR); - printk(BIOS_DEBUG, "\ttRRD: %d\n", s->selected_timings.tRRD); - printk(BIOS_DEBUG, "\ttRTP: %d\n", s->selected_timings.tRTP); -} - static void clkcross_ddr2(struct sysinfo *s) { u8 i, j; @@ -500,8 +393,7 @@ static void timings_ddr2(struct sysinfo *s) twl = s->selected_timings.CAS - 1; FOR_EACH_POPULATED_DIMM(s->dimms, i) { - if (s->dimms[i].banks == 1) { - /* 8 banks */ + if (s->dimms[i].n_banks == N_BANKS_8) { trpmod = 1; bankmod = 0; } @@ -1276,11 +1168,12 @@ static void dradrb_ddr2(struct sysinfo *s) i = ch << 1; else i = (ch << 1) + 1; - dra = dratab[s->dimms[i].banks] + + dra = dratab[s->dimms[i].n_banks] [s->dimms[i].width] [s->dimms[i].cols-9] [s->dimms[i].rows-12]; - if (s->dimms[i].banks == 1) + if (s->dimms[i].n_banks == N_BANKS_8) dra |= 0x80; if (ch == 0) { c0dra |= dra << (r*8); @@ -1313,12 +1206,10 @@ static void dradrb_ddr2(struct sysinfo *s) if (ch == 0) { dra0 = (c0dra >> (8*r)) & 0x7f; c0drb = (u16)(c0drb + drbtab[dra0]); - s->dimms[i].rank_capacity_mb = drbtab[dra0] << 6; MCHBAR16(0x200 + 2*r) = c0drb; } else { dra1 = (c1dra >> (8*r)) & 0x7f; c1drb = (u16)(c1drb + drbtab[dra1]); - s->dimms[i].rank_capacity_mb = drbtab[dra1] << 6; MCHBAR16(0x600 + 2*r) = c1drb; } } @@ -1588,9 +1479,6 @@ void raminit_ddr2(struct sysinfo *s) u8 r, bank; u32 reg32; - // Select timings based on SPD info - sdram_detect_smallest_params2(s); - if (s->boot_path != BOOT_PATH_WARM_RESET) { // Clear self refresh MCHBAR32(PMSTS_MCHBAR) = MCHBAR32(PMSTS_MCHBAR) diff --git a/src/northbridge/intel/x4x/x4x.h b/src/northbridge/intel/x4x/x4x.h index 9db6c12122..cbb1853fab 100644 --- a/src/northbridge/intel/x4x/x4x.h +++ b/src/northbridge/intel/x4x/x4x.h @@ -144,6 +144,7 @@ #define TOTAL_DIMMS 4 #define DIMMS_PER_CHANNEL (TOTAL_DIMMS / TOTAL_CHANNELS) #define RAW_CARD_UNPOPULATED 0xff +#define RAW_CARD_POPULATED 0 #define DIMM_IS_POPULATED(dimms, idx) (dimms[idx].card_type != RAW_CARD_UNPOPULATED) #define IF_DIMM_POPULATED(dimms, idx) if (dimms[idx].card_type != RAW_CARD_UNPOPULATED) @@ -249,8 +250,14 @@ struct dll_setting { u8 coarse; }; +enum n_banks { + N_BANKS_4 = 0, + N_BANKS_8 = 1, +}; + struct timings { unsigned int CAS; + unsigned int tclk; enum fsb_clock fsb_clk; enum mem_clock mem_clk; unsigned int tRAS; @@ -267,40 +274,20 @@ struct dimminfo { unsigned int card_type; /* 0xff: unpopulated, 0xa - 0xf: raw card type A - F */ enum chip_width width; - enum chip_cap chip_capacity; unsigned int page_size; /* of whole DIMM in Bytes (4096 or 8192) */ - unsigned int sides; - unsigned int banks; + enum n_banks n_banks; unsigned int ranks; unsigned int rows; unsigned int cols; - unsigned int cas_latencies; - unsigned int tAAmin; - unsigned int tCKmin; - unsigned int tWR; - unsigned int tRP; - unsigned int tRCD; - unsigned int tRAS; - unsigned int rank_capacity_mb; /* per rank in Megabytes */ - u8 spd_data[256]; }; /* The setup is up to two DIMMs per channel */ struct sysinfo { - int txt_enabled; - int cores; int boot_path; int max_ddr2_mhz; - int max_ddr3_mt; enum fsb_clock max_fsb; - int max_fsb_mhz; - int max_render_mhz; - int enable_igd; - int enable_peg; - u16 ggc; int dimm_config[2]; - int dimms_per_ch; int spd_type; int channel_capacity[2]; struct timings selected_timings; @@ -346,6 +333,8 @@ u8 decode_pciebar(u32 *const base, u32 *const len); void sdram_initialize(int boot_path, const u8 *spd_map); void raminit_ddr2(struct sysinfo *); void rcven(const struct sysinfo *); +u32 fsb2mhz(u32 speed); +u32 ddr2mhz(u32 speed); struct acpi_rsdp; #ifndef __SIMPLE_DEVICE__ -- cgit v1.2.3