diff options
Diffstat (limited to 'src/arch/x86/lib/mmap_boot.c')
| -rw-r--r-- | src/arch/x86/lib/mmap_boot.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/arch/x86/lib/mmap_boot.c b/src/arch/x86/lib/mmap_boot.c index eb7b23e2b1..4dd269b772 100644 --- a/src/arch/x86/lib/mmap_boot.c +++ b/src/arch/x86/lib/mmap_boot.c @@ -18,6 +18,10 @@ */ #include <boot_device.h> +#include <console/console.h> +#include <cbfs.h> +#include <endian.h> +#include <stdlib.h> /* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */ #define rom_base ((void *)(uintptr_t)(-(int32_t)CONFIG_ROM_SIZE)) @@ -29,3 +33,43 @@ const struct region_device *boot_device_ro(void) { return &boot_dev.rdev; } + +int cbfs_boot_region_properties(struct cbfs_props *props) +{ + struct cbfs_header header; + int32_t offset; + const struct region_device *bdev; + + bdev = boot_device_ro(); + + rdev_readat(bdev, &offset, CONFIG_ROM_SIZE - sizeof(offset), + sizeof(offset)); + + /* The offset is relative to the end of the media. */ + offset += CONFIG_ROM_SIZE; + + rdev_readat(bdev, &header , offset, sizeof(header)); + + header.magic = ntohl(header.magic); + header.romsize = ntohl(header.romsize); + header.bootblocksize = ntohl(header.bootblocksize); + header.align = ntohl(header.align); + header.offset = ntohl(header.offset); + + if (header.magic != CBFS_HEADER_MAGIC) + return -1; + + props->align = header.align; + props->offset = header.offset; + if (CONFIG_ROM_SIZE != header.romsize) + props->size = CONFIG_ROM_SIZE; + else + props->size = header.romsize; + props->size -= props->offset; + props->size -= header.bootblocksize; + props->size = ALIGN_DOWN(props->size, props->align); + + printk(BIOS_DEBUG, "CBFS @ %zx size %zx\n", props->offset, props->size); + + return 0; +} |