diff options
Diffstat (limited to 'resources/libreboot/patch/0001_i945_3dfix.git.diff')
| -rw-r--r-- | resources/libreboot/patch/0001_i945_3dfix.git.diff | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/resources/libreboot/patch/0001_i945_3dfix.git.diff b/resources/libreboot/patch/0001_i945_3dfix.git.diff new file mode 100644 index 00000000..f4173397 --- /dev/null +++ b/resources/libreboot/patch/0001_i945_3dfix.git.diff @@ -0,0 +1,37 @@ +diff --git a/src/northbridge/intel/i945/gma.c b/src/northbridge/intel/i945/gma.c +index 4dd2ccf..5dbaff3 100644 +--- a/src/northbridge/intel/i945/gma.c ++++ b/src/northbridge/intel/i945/gma.c +@@ -33,6 +33,8 @@ + + #define GDRST 0xc0 + ++#define BSM 0x5c ++ + #define LVDS_CLOCK_A_POWERUP_ALL (3 << 8) + #define LVDS_CLOCK_B_POWERUP_ALL (3 << 4) + #define LVDS_CLOCK_BOTH_POWERUP_ALL (3 << 2) +@@ -51,11 +53,19 @@ + static int gtt_setup(unsigned int mmiobase) + { + unsigned long PGETBL_save; +- +- PGETBL_save = read32(mmiobase + PGETBL_CTL) & ~PGETBL_ENABLED; ++ unsigned long tom; // top of memory ++ ++ /* ++ * The Video BIOS places the GTT right below top of memory. ++ * It is not documented in the Intel 945 datasheet, but the Intel ++ * developers said that it is normally placed there. ++ * ++ * TODO: Add option to make the GTT size runtime ++ * configurable ++ */ ++ tom = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), TOLUD) << 24; ++ PGETBL_save = tom - 256 * KiB; + PGETBL_save |= PGETBL_ENABLED; +- +- PGETBL_save |= pci_read_config32(dev_find_slot(0, PCI_DEVFN(2,0)), 0x5c) & 0xfffff000; + PGETBL_save |= 2; /* set GTT to 256kb */ + + write32(mmiobase + GFX_FLSH_CNTL, 0); |