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| author | Aaron Durbin <adurbin@chromium.org> | 2013-02-08 17:15:53 -0600 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-03-21 18:04:56 +0100 |
| commit | cddcc80048ab963f96d13575a3f63070cf6d7c14 (patch) | |
| tree | 02c3ac7fdb82bc9eda29aff90dbf88e00c145079 /src/arch | |
| parent | a1db81b47a74ce53b8403eed28876efccf0bcefe (diff) | |
| download | coreboot-cddcc80048ab963f96d13575a3f63070cf6d7c14.tar.xz | |
coreboot: introduce romstage_handoff structure
The romstage_handoff structure is intended to be a way for romstage and
ramstage to communicate with one another instead of using sideband
signals such as stuffing magic values in pci config or memory
scratch space. Initially this structure just contains a single region
that indicates to ramstage that it should reserve a memory region used
by the romstage. Ramstage looks for a romstage_handoff structure in cbmem
with an id of CBMEM_ID_ROMSTAGE_INFO. If found, it will honor reserving
the region defined in the romstage_handoff structure.
Change-Id: I9274ea5124e9bd6584f6977d8280b7e9292251f0
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2791
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/boot/coreboot_table.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/arch/x86/boot/coreboot_table.c b/src/arch/x86/boot/coreboot_table.c index ab0f7ef821..463f723097 100644 --- a/src/arch/x86/boot/coreboot_table.c +++ b/src/arch/x86/boot/coreboot_table.c @@ -31,6 +31,7 @@ #include <stdlib.h> #include <cbfs.h> #include <cbmem.h> +#include <romstage_handoff.h> #if CONFIG_USE_OPTION_TABLE #include <option_table.h> #endif @@ -591,6 +592,23 @@ static void add_lb_reserved(struct lb_memory *mem) lb_add_rsvd_range, mem); } +static void add_romstage_resources(struct lb_memory *mem) +{ + struct romstage_handoff *handoff; + + /* Reserve memory requested to be reserved from romstage. */ + handoff = cbmem_find(CBMEM_ID_ROMSTAGE_INFO); + + if (handoff == NULL) + return; + + if (handoff->reserve_size == 0) + return; + + lb_add_memory_range(mem, LB_MEM_RESERVED, handoff->reserve_base, + handoff->reserve_size); +} + unsigned long write_coreboot_table( unsigned long low_table_start, unsigned long low_table_end, unsigned long rom_table_start, unsigned long rom_table_end) @@ -658,6 +676,8 @@ unsigned long write_coreboot_table( /* Add reserved regions */ add_lb_reserved(mem); + add_romstage_resources(mem); + lb_dump_memory_ranges(mem); /* Note: |