diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2013-01-22 18:57:56 +0800 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-01-30 17:58:32 +0100 |
| commit | 6fe0cab205e131525efbfce4f59da344b1e76598 (patch) | |
| tree | 0ecd9e5059fd9bb2669f7487f39890beee14fcc3 /src/northbridge/intel/sandybridge | |
| parent | 5fc64dca45b01556a9325bea0fb563d6f0d16f75 (diff) | |
Extend CBFS to support arbitrary ROM source media.
Summary:
Isolate CBFS underlying I/O to board/arch-specific implementations as
"media stream", to allow loading and booting romstage on non-x86.
CBFS functions now all take a new "media source" parameter; use
CBFS_DEFAULT_MEDIA if you simply want to load from main firmware.
API Changes:
cbfs_find => cbfs_get_file.
cbfs_find_file => cbfs_get_file_content.
cbfs_get_file => cbfs_get_file_content with correct type.
CBFS used to work only on memory-mapped ROM (all x86). For platforms like ARM,
the ROM may come from USB, UART, or SPI -- any serial devices and not available
for memory mapping.
To support these devices (and allowing CBFS to read from multiple source
at the same time), CBFS operations are now virtual-ized into "cbfs_media". To
simplify porting existing code, every media source must support both "reading
into pre-allocated memory (read)" and "read and return an allocated buffer
(map)". For devices without native memory-mapped ROM, "cbfs_simple_buffer*"
provides simple memory mapping simulation.
Every CBFS function now takes a cbfs_media* as parameter. CBFS_DEFAULT_MEDIA
is defined for CBFS functions to automatically initialize a per-board default
media (CBFS will internally calls init_default_cbfs_media). Also revised CBFS
function names relying on memory mapped backend (ex, "cbfs_find" => actually
loads files). Now we only have two getters:
struct cbfs_file *entry = cbfs_get_file(media, name);
void *data = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type);
Test results:
- Verified to work on x86/qemu.
- Compiles on ARM, and follow up commit will provide working SPI driver.
Change-Id: Iac911ded25a6f2feffbf3101a81364625bb07746
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/2182
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/northbridge/intel/sandybridge')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c index b5a1c23f94..f25aaa1195 100644 --- a/src/northbridge/intel/sandybridge/raminit.c +++ b/src/northbridge/intel/sandybridge/raminit.c @@ -252,7 +252,9 @@ void sdram_initialize(struct pei_data *pei_data) pei_data->tx_byte = console_tx_byte; /* Locate and call UEFI System Agent binary. */ - entry = (unsigned long)cbfs_find_file("mrc.bin", 0xab); + /* TODO make MRC blob (0xab?) defined in cbfs_core.h. */ + entry = (unsigned long)cbfs_get_file_content( + CBFS_DEFAULT_MEDIA, "mrc.bin", 0xab); if (entry) { int rv; asm volatile ( |