diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/acpi.c')
| -rw-r--r-- | src/northbridge/intel/sandybridge/acpi.c | 37 |
1 files changed, 4 insertions, 33 deletions
diff --git a/src/northbridge/intel/sandybridge/acpi.c b/src/northbridge/intel/sandybridge/acpi.c index 755d446e97..2c9867480c 100644 --- a/src/northbridge/intel/sandybridge/acpi.c +++ b/src/northbridge/intel/sandybridge/acpi.c @@ -11,48 +11,19 @@ unsigned long acpi_fill_mcfg(unsigned long current) { - u32 pciexbar = 0; - u32 pciexbar_reg; - int max_buses; + u32 length, pciexbar; - struct device *const dev = pcidev_on_root(0, 0); - - if (!dev) + if (!decode_pcie_bar(&pciexbar, &length)) return current; - pciexbar_reg = pci_read_config32(dev, PCIEXBAR); - - /* MMCFG not supported or not enabled */ - if (!(pciexbar_reg & (1 << 0))) - return current; - - switch ((pciexbar_reg >> 1) & 3) { - case 0: /* 256MB */ - pciexbar = pciexbar_reg & (0xffffffffULL << 28); - max_buses = 256; - break; - case 1: /* 128M */ - pciexbar = pciexbar_reg & (0xffffffffULL << 27); - max_buses = 128; - break; - case 2: /* 64M */ - pciexbar = pciexbar_reg & (0xffffffffULL << 26); - max_buses = 64; - break; - default: /* RSVD */ - return current; - } - - if (!pciexbar) - return current; + const int max_buses = length / MiB; current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current, pciexbar, 0, 0, - max_buses - 1); + max_buses - 1); return current; } - static unsigned long acpi_create_igfx_rmrr(const unsigned long current) { const u32 base_mask = ~(u32)(MiB - 1); |