diff options
Diffstat (limited to 'src/mainboard/amd/rumba')
| -rw-r--r-- | src/mainboard/amd/rumba/auto.c | 69 |
1 files changed, 59 insertions, 10 deletions
diff --git a/src/mainboard/amd/rumba/auto.c b/src/mainboard/amd/rumba/auto.c index 15b3606f0e..84c837bcc2 100644 --- a/src/mainboard/amd/rumba/auto.c +++ b/src/mainboard/amd/rumba/auto.c @@ -26,20 +26,70 @@ static inline int spd_read_byte(unsigned device, unsigned address) #include "northbridge/amd/gx2/raminit.h" -static void sdram_set_spd_registers(const struct mem_controller *ctrl) { +static inline unsigned int fls(unsigned int x) +{ + int r; + + __asm__("bsfl %1,%0\n\t" + "jnz 1f\n\t" + "movl $32,%0\n" + "1:" : "=r" (r) : "g" (x)); + return r; +} + +static void sdram_set_spd_registers(const struct mem_controller *ctrl) +{ + /* Total size of DIMM = 2^row address (byte 3) * 2^col address (byte 4) * + * component Banks (byte 17) * module banks, side (byte 5) * + * width in bits (byte 6,7) + * = Density per side (byte 31) * number of sides (byte 5) */ + /* 1. Initialize GLMC registers base on SPD values, do one DIMM for now */ msr_t msr; - /* 1. Initialize GLMC registers base on SPD values, - * Hard coded as XpressROM for now */ - //print_debug("sdram_enable step 1\r\n"); - msr = rdmsr(0x20000018); - msr.hi = 0x10076013; + unsigned char module_banks, val; + + msr = rdmsr(MC_CF07_DATA); + + /* get module banks (sides) per dimm, SPD byte 5 */ + module_banks = spd_read_byte(0xA0, 5); + if (module_banks < 1 || module_banks > 2) + print_err("Module banks per dimm\r\n"); + module_banks >>= 1; + msr.hi &= ~(1 << CF07_UPPER_D0_MB_SHIFT); + msr.hi |= (module_banks << CF07_UPPER_D0_MB_SHIFT); + + /* get component banks per module bank, SPD byte 17 */ + val = spd_read_byte(0xA0, 17); + if (val < 2 || val > 4) + print_err("Component banks per module bank\r\n"); + val >>= 2; + msr.hi &= ~(0x1 << CF07_UPPER_D0_CB_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_CB_SHIFT); + + /* get the module bank density, SPD byte 31 */ + val = spd_read_byte(0xA0, 31); + val = fls(val); + val <<= module_banks; + msr.hi &= ~(0xf << CF07_UPPER_D0_SZ_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_SZ_SHIFT); + + /* page size = 2^col address */ + val = spd_read_byte(0xA0, 4); + val -= 7; + msr.hi &= ~(0x7 << CF07_UPPER_D0_PSZ_SHIFT); + msr.hi |= (val << CF07_UPPER_D0_PSZ_SHIFT); + + print_debug("computed msr.hi "); + print_debug_hex32(msr.hi); + print_debug("\r\n"); + msr.lo = 0x00003000; - wrmsr(0x20000018, msr); + wrmsr(MC_CF07_DATA, msr); msr = rdmsr(0x20000019); msr.hi = 0x18000108; msr.lo = 0x696332a3; - wrmsr(0x20000019, msr); + wrmsr(0x20000019, msr); + } #include "northbridge/amd/gx2/raminit.c" @@ -100,6 +150,5 @@ static void main(unsigned long bist) /* Check all of memory */ - ram_check(0x00000000, 640*1024); - + //ram_check(0x00000000, 640*1024); } |