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 sjg@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;