sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

gm45: Decrease MTRR usage

Browse Source 
Change-Id: I4c790b0eaf2af94286e6691281fcad3d14659a99
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6687
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Vladimir Serbinenko
2014-08-16 10:59:02 +02:00
parent 084ed45a95
commit 56ae8a0b0f
6 changed files with 75 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
src/northbridge/intel/gm45/igd.c
View File

@@ -41,7 +41,6 @@ static void enable_igd(const sysinfo_t *const sysinfo, const int no_peg)
u16 reg16;
u32 reg32;
u8 gfxsize;
printk(BIOS_DEBUG, "Enabling IGD.\n");
@@ -61,20 +60,9 @@ static void enable_igd(const sysinfo_t *const sysinfo, const int no_peg)
reg16 |= display_clock_from_f0_and_vco[f0_12][vco];
pci_write_config16(igd_dev, 0xcc, reg16);
/* Graphics Stolen Memory: 2MB GTT (0x0300) when VT-d disabled,
2MB GTT + 2MB shadow GTT (0x0b00) else. */
const u32 capid = pci_read_config32(mch_dev, D0F0_CAPID0 + 4);
reg16 = pci_read_config16(mch_dev, D0F0_GGC);
if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) {
/* 0 for 32MB */
gfxsize = 0;
}
reg16 &= 0xf00f;
reg16 |= 0x0300 | ((gfxsize + 5) << 4);
if (!(capid & (1 << (48 - 32))))
reg16 |= 0x0800;
reg16 |= sysinfo->ggc;
pci_write_config16(mch_dev, D0F0_GGC, reg16);
if ((sysinfo->gfx_type != GMCH_GL40) &&
@@ -146,14 +134,35 @@ static void disable_igd(const sysinfo_t *const sysinfo)
}
}
void init_igd(const sysinfo_t *const sysinfo,
const int no_igd, const int no_peg)
void init_igd(const sysinfo_t *const sysinfo)
{
const device_t mch_dev = PCI_DEV(0, 0, 0);
const u8 capid = pci_read_config8(mch_dev, D0F0_CAPID0 + 4);
if (no_igd || (capid & (1 << (33 - 32))))
if (!sysinfo->enable_igd || (capid & (1 << (33 - 32))))
disable_igd(sysinfo);
else
enable_igd(sysinfo, no_peg);
enable_igd(sysinfo, !sysinfo->enable_peg);
}
void igd_compute_ggc(sysinfo_t *const sysinfo)
{
const device_t mch_dev = PCI_DEV(0, 0, 0);
const u32 capid = pci_read_config32(mch_dev, D0F0_CAPID0 + 4);
if (!sysinfo->enable_igd || (capid & (1 << (33 - 32))))
sysinfo->ggc = 0x0002;
else {
u8 gfxsize;
/* Graphics Stolen Memory: 2MB GTT (0x0300) when VT-d disabled,
2MB GTT + 2MB shadow GTT (0x0b00) else. */
if (get_option(&gfxsize, "gfx_uma_size") != CB_SUCCESS) {
/* 0 for 32MB */
gfxsize = 0;
}
sysinfo->ggc = 0x0300 | ((gfxsize + 5) << 4);
if (!(capid & (1 << (48 - 32))))
sysinfo->ggc |= 0x0800;
}
}