diff options
Diffstat (limited to 'src/northbridge/intel/i5000/bootblock.c')
-rw-r--r-- | src/northbridge/intel/i5000/bootblock.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/northbridge/intel/i5000/bootblock.c b/src/northbridge/intel/i5000/bootblock.c new file mode 100644 index 0000000000..eabbee6d63 --- /dev/null +++ b/src/northbridge/intel/i5000/bootblock.c @@ -0,0 +1,21 @@ +#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); +} |