lib/cbmem_top: Add a common cbmem_top implementation
This adds a common cbmem_top implementation to all coreboot target.
In romstage a static variable will be used to cache the result of
cbmem_top_romstage.
In ramstage if CONFIG_RAMSTAGE_CBMEM_TOP_ARG is set a global variable
needs to be populated by the stage entry with the value passed via the
calling arguments. if CONFIG_RAMSTAGE_CBMEM_TOP_ARG is not set the
same implementation as will be used as in romstage.
Change-Id: Ie767542ee25483acc9a56785ce20a885e9a63098
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36273
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
diff --git a/src/mainboard/emulation/qemu-power8/cbmem.c b/src/mainboard/emulation/qemu-power8/cbmem.c
index 3df6b80..7d6d4a8 100644
--- a/src/mainboard/emulation/qemu-power8/cbmem.c
+++ b/src/mainboard/emulation/qemu-power8/cbmem.c
@@ -15,7 +15,7 @@
#include <cbmem.h>
-void *cbmem_top(void)
+void *cbmem_top_chipset(void)
{
/* Top of cbmem is at lowest usable DRAM address below 4GiB. */
/* For now, last 1M of 4G */