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authorKyösti Mälkki <kyosti.malkki@gmail.com>2013-09-04 13:26:11 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2013-09-11 07:18:02 +0200
commitbc90e15d3f8e841ccf229fca5d7df99436ff4bdb (patch)
treebbbd4f2904b42d201d7e2fbccea5bfcbeeeed166 /src/arch
parentc04afd6433cd53acdc727ad760cde9c40090030b (diff)
downloadcoreboot-bc90e15d3f8e841ccf229fca5d7df99436ff4bdb.tar.xz
CBMEM: Backup top_of_ram instead of cbmem_toc
AMD northbridges have a complex way to resolve top_of_ram. Once it is resolved, it is stored in NVRAM to be used on resume. TODO: Redesign these get_top_of_ram() functions from scratch. Change-Id: I3cceb7e9b8b07620dacf138e99f98dc818c65341 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/3557 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/arch')
-rw-r--r--src/arch/x86/boot/cbmem.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/arch/x86/boot/cbmem.c b/src/arch/x86/boot/cbmem.c
index 333ca55ccf..991a3e6f01 100644
--- a/src/arch/x86/boot/cbmem.c
+++ b/src/arch/x86/boot/cbmem.c
@@ -40,12 +40,18 @@ void get_cbmem_table(uint64_t *base, uint64_t *size)
#endif
#if !CONFIG_DYNAMIC_CBMEM && !defined(__PRE_RAM__)
+void __attribute__((weak)) backup_top_of_ram(uint64_t ramtop)
+{
+ /* Do nothing. Chipset may have implementation to save ramtop in NVRAM. */
+}
+
/* This is for compatibility with old boards only. Any new chipset and board
* must implement get_top_of_ram() for both romstage and ramstage to support
* features like CAR_MIGRATION and CBMEM_CONSOLE.
*/
void set_top_of_ram(uint64_t ramtop)
{
+ backup_top_of_ram(ramtop);
cbmem_late_set_table(ramtop - HIGH_MEMORY_SIZE, HIGH_MEMORY_SIZE);
}
#endif