From 727b5455fbdd3003005da83039f92c96354b53a2 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Thu, 8 Aug 2013 16:28:41 -0700 Subject: Add a specific post code for S3 resume failures If the firwmare is flashed and the MRC cache is blown away then it is not possible to resume. Right now this can be inferred from the event log but it can be made very clear by adding a unique post code for this event. 1) boot falco 2) flash firmware 3) suspend and then resume 4) check for post code 0xef in log 0 | 2013-08-08 16:27:47 | Log area cleared | 4096 1 | 2013-08-08 16:27:47 | ACPI Enter | S3 2 | 2013-08-08 16:27:55 | System boot | 48 3 | 2013-08-08 16:27:55 | Last post code in previous boot | 0xef | Resume Failure 4 | 2013-08-08 16:27:55 | System Reset 5 | 2013-08-08 16:27:55 | ACPI Wake | S5 Change-Id: I7602d9eef85d3b764781990249ae32b84fe84134 Signed-off-by: Duncan Laurie Reviewed-on: https://gerrit.chromium.org/gerrit/65259 Reviewed-by: Aaron Durbin Reviewed-on: http://review.coreboot.org/4458 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi --- src/northbridge/intel/haswell/raminit.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'src/northbridge') diff --git a/src/northbridge/intel/haswell/raminit.c b/src/northbridge/intel/haswell/raminit.c index a90b360116..e916c5e8a5 100644 --- a/src/northbridge/intel/haswell/raminit.c +++ b/src/northbridge/intel/haswell/raminit.c @@ -156,7 +156,9 @@ void sdram_initialize(struct pei_data *pei_data) /* If MRC data is not found we cannot continue S3 resume. */ if (pei_data->boot_mode == 2 && !pei_data->mrc_input) { - printk(BIOS_DEBUG, "Giving up in sdram_initialize: No MRC data\n"); + post_code(POST_RESUME_FAILURE); + printk(BIOS_DEBUG, "Giving up in sdram_initialize: " + "No MRC data\n"); outb(0x6, 0xcf9); while(1) { hlt(); -- cgit v1.2.3