This code takes about 450ms without the MRC cache and about 27ms with the
cache. Add a debug timer so that this time can be displayed.
Signed-off-by: Simon Glass <s...@chromium.org>
---
arch/x86/cpu/ivybridge/sdram.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/x86/cpu/ivybridge/sdram.c b/arch/x86/cpu/ivybridge/sdram.c
index e637909..d9b3dfc 100644
--- a/arch/x86/cpu/ivybridge/sdram.c
+++ b/arch/x86/cpu/ivybridge/sdram.c
@@ -336,9 +336,11 @@ int sdram_initialise(struct pei_data *pei_data)
if (data) {
int rv;
int (*func)(struct pei_data *);
+ ulong start;
debug("Calling MRC at %p\n", data);
post_code(POST_PRE_MRC);
+ start = get_timer(0);
func = (int (*)(struct pei_data *))data;
rv = func(pei_data);
post_code(POST_MRC);
@@ -356,6 +358,7 @@ int sdram_initialise(struct pei_data *pei_data)
printf("Nonzero MRC return value.\n");
return -EFAULT;
}
+ debug("MRC execution time %lu ms\n", get_timer(start));
} else {
printf("UEFI PEI System Agent not found.\n");
return -ENOSYS;
--
2.6.0.rc2.230.g3dd15c0
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