diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/intel/x4x/raminit_ddr2.c | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/src/northbridge/intel/x4x/raminit_ddr2.c b/src/northbridge/intel/x4x/raminit_ddr2.c index d21924b870..3dd00fb2b6 100644 --- a/src/northbridge/intel/x4x/raminit_ddr2.c +++ b/src/northbridge/intel/x4x/raminit_ddr2.c @@ -45,14 +45,22 @@ static u32 ddr2mhz(u32 speed) return mhz[speed]; } -static u8 msbpos(u8 val) //Reverse +/* Find MSB bitfield location using bit scan reverse instruction */ +static u8 msbpos(u32 val) { - u8 i; - for (i = 7; i >= 0; i--) { - if ((val & (1 << i)) == 0) - break; + u32 pos; + + if (val == 0) { + printk(BIOS_WARNING, "WARNING: Input to BSR is zero\n"); + return 0; } - return i; + + asm ("bsrl %1, %0" + :"=r"(pos) + :"r"(val) + ); + + return (u8)(pos & 0xff); } static void sdram_detect_smallest_params2(struct sysinfo *s) @@ -1614,7 +1622,9 @@ static void dradrb_ddr2(struct sysinfo *s) static void mmap_ddr2(struct sysinfo *s) { - u32 gfxsize, gttsize, tsegsize, mmiosize, tom, tolud, touud, gfxbase, gttbase, tsegbase; + bool reclaim; + u32 gfxsize, gttsize, tsegsize, mmiosize, tom, tolud, touud; + u32 gfxbase, gttbase, tsegbase, reclaimbase, reclaimlimit; u16 ggc; u16 ggc2uma[] = { 0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352 }; u8 ggc2gtt[] = { 0, 1, 0, 2, 0, 0, 0, 0, 0, 2, 3, 4}; @@ -1626,13 +1636,34 @@ static void mmap_ddr2(struct sysinfo *s) mmiosize = 0x400; // 1GB MMIO tom = s->channel_capacity[0] + s->channel_capacity[1] - ME_UMA_SIZEMB; tolud = MIN(0x1000 - mmiosize, tom); + + reclaim = false; + if ((tom - tolud) > 0x40) + reclaim = true; + + if (reclaim) { + tolud = tolud & ~0x3f; + tom = tom & ~0x3f; + reclaimbase = MAX(0x1000, tom); + reclaimlimit = reclaimbase + (MIN(0x1000, tom) - tolud) - 0x40; + } + touud = tom; + if (reclaim) + touud = reclaimlimit + 0x40; + gfxbase = tolud - gfxsize; gttbase = gfxbase - gttsize; tsegbase = gttbase - tsegsize; pci_write_config16(PCI_DEV(0,0,0), 0xb0, tolud << 4); pci_write_config16(PCI_DEV(0,0,0), 0xa0, tom >> 6); + if (reclaim) { + pci_write_config16(PCI_DEV(0,0,0), 0x98, + (u16)(reclaimbase >> 6)); + pci_write_config16(PCI_DEV(0,0,0), 0x9a, + (u16)(reclaimlimit >> 6)); + } pci_write_config16(PCI_DEV(0,0,0), 0xa2, touud); pci_write_config32(PCI_DEV(0,0,0), 0xa4, gfxbase << 20); pci_write_config32(PCI_DEV(0,0,0), 0xa8, gttbase << 20); @@ -1993,7 +2024,15 @@ void raminit_ddr2(struct sysinfo *s) printk(BIOS_DEBUG, "Done power settings\n"); // ME related - //MCHBAR32(0xa30) = MCHBAR32(0xa30) | (1 << 26); + if (RANK_IS_POPULATED(s->dimms, 0, 0) + || RANK_IS_POPULATED(s->dimms, 1, 0)) { + MCHBAR8(0xa2f) = MCHBAR8(0xa2f) | (1 << 0); + } + if (RANK_IS_POPULATED(s->dimms, 0, 1) + || RANK_IS_POPULATED(s->dimms, 1, 1)) { + MCHBAR8(0xa2f) = MCHBAR8(0xa2f) | (1 << 1); + } + MCHBAR32(0xa30) = MCHBAR32(0xa30) | (1 << 26); printk(BIOS_DEBUG, "Done ddr2\n"); } |