From fd8f4729ac6520e59dd1d3f57d503d8abe345ac5 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 18 Oct 2015 15:55:36 -0600 Subject: x86: ivybridge: Measure the MRC code execution time 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 Reviewed-by: Bin Meng --- arch/x86/cpu/ivybridge/sdram.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') 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; -- cgit v1.1