Use TOM2 for highest sysmem setting for northbound memory routing (DMA). This fixes 4GB memory issues.
Signed-off-by: Marc Jones <[email protected]> -- http://se-eng.com
Use TOM2 for highest sysmem setting for northbound memory routing (DMA). This fixes 4GB memory issues. Signed-off-by: Marc Jones <[email protected]> Index: coreboot/src/southbridge/amd/rs780/gfx.c =================================================================== --- coreboot.orig/src/southbridge/amd/rs780/gfx.c 2011-04-01 11:45:45.894571001 -0600 +++ coreboot/src/southbridge/amd/rs780/gfx.c 2011-04-01 12:06:53.598570831 -0600 @@ -661,11 +661,13 @@ printk(BIOS_DEBUG, "rs780_internal_gfx_enable dev = 0x%p, nb_dev = 0x%p.\n", dev, nb_dev); + /* The system top memory in 780. */ sysmem = rdmsr(0xc001001a); - printk(BIOS_DEBUG, "sysmem = %x_%x\n", sysmem.hi, sysmem.lo); - - /* The system top memory in 780. */ + printk(BIOS_DEBUG, "Sysmem TOM = %x_%x\n", sysmem.hi, sysmem.lo); pci_write_config32(nb_dev, 0x90, sysmem.lo); + + sysmem = rdmsr(0xc001001D); + printk(BIOS_DEBUG, "Sysmem TOM2 = %x_%x\n", sysmem.hi, sysmem.lo); htiu_write_index(nb_dev, 0x30, 0); htiu_write_index(nb_dev, 0x31, 0);
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