diff options
Diffstat (limited to 'src/northbridge/intel/i945/acpi.c')
| -rw-r--r-- | src/northbridge/intel/i945/acpi.c | 35 |
1 files changed, 4 insertions, 31 deletions
diff --git a/src/northbridge/intel/i945/acpi.c b/src/northbridge/intel/i945/acpi.c index 75a6da5175..232575f586 100644 --- a/src/northbridge/intel/i945/acpi.c +++ b/src/northbridge/intel/i945/acpi.c @@ -3,46 +3,19 @@ #include <types.h> #include <acpi/acpi.h> #include <acpi/acpigen.h> +#include <commonlib/helpers.h> #include <device/device.h> #include <device/pci_ops.h> #include "i945.h" unsigned long acpi_fill_mcfg(unsigned long current) { - struct device *dev; - u32 pciexbar = 0; - u32 pciexbar_reg; - int max_buses; + u32 length, pciexbar; - 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 & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)); - max_buses = 256; - break; - case 1: // 128M - pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)); - max_buses = 128; - break; - case 2: // 64M - pciexbar = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 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, 0x0, 0x0, max_buses - 1); |