| #include <arch/io.h> |
| |
| static void bootblock_northbridge_init(void) |
| { |
| /* |
| * The "io" variant of the config access is explicitly used to |
| * setup the PCIEXBAR because CONFIG_MMCONF_SUPPORT_DEFAULT is set to |
| * to true. That way all subsequent non-explicit config accesses use |
| * MCFG. This code also assumes that bootblock_northbridge_init() is |
| * the first thing called in the non-asm boot block code. The final |
| * assumption is that no assembly code is using the |
| * CONFIG_MMCONF_SUPPORT_DEFAULT option to do PCI config acceses. |
| * |
| * The PCIEXBAR is assumed to live in the memory mapped IO space under |
| * 4GiB. |
| */ |
| |
| /* setup PCIe MMCONF base address */ |
| pci_io_write_config32(PCI_DEV(0, 16, 0), 0x64, |
| CONFIG_MMCONF_BASE_ADDRESS >> 16); |
| } |