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intel/sandybridge: Use common ACPI S3 recovery 

Fix regression, S3 resume not working on sandy/ivy after commit
   9d6f365 ACPI S3: Remove HIGH_MEMORY_SAVE where possible

There is some 20ms delay with ACPI S3 wakeup time due to MTRR setup
being done after the backup copy. Moving to RELOCATABLE_RAMSTAGE fixes
this delay by removing need of this backup entirely.

Change-Id: Ib72ff914f5dfef8611f5f6cf9687495779013b02
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15248
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Kyösti Mälkki 2016-06-17 22:54:22 +03:00
parent 5ecc41b0c9
commit 9b9915284f
3 changed files with 2 additions and 37 deletions
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23
src/cpu/intel/model_206ax/cache_as_ram.inc
View File

@ -17,8 +17,6 @@
#include <cpu/x86/mtrr.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/post_code.h>
#include <arch/acpi.h>
#include "northbridge/intel/sandybridge/sandybridge.h"
/* The full cache-as-ram size includes the cache-as-ram portion from coreboot
* and the space used by the reference code. These 2 values combined should
@ -284,27 +282,6 @@ before_romstage:
post_code(0x3c)
#if CONFIG_HAVE_ACPI_RESUME
movl CBMEM_BOOT_MODE, %eax
cmpl $0x2, %eax // Resume?
jne __acpi_resume_backup_done
/* copy 1MB - 64K to high tables ram_base to prevent memory corruption
* through stage 2. We could keep stuff like stack and heap in high
* tables memory completely, but that's a wonderful clean up task for
* another day.
*/
cld
movl $CONFIG_RAMBASE, %esi
movl CBMEM_RESUME_BACKUP, %edi
movl $HIGH_MEMORY_SAVE >> 2, %ecx
rep movsl
__acpi_resume_backup_done:
#endif
post_code(0x3d)
__main:
post_code(POST_PREPARE_RAMSTAGE)
cld /* Clear direction flag. */

10
src/northbridge/intel/sandybridge/early_init.c
View File

@ -233,15 +233,9 @@ void northbridge_romstage_finalize(int s3resume)
* this is not a resume. In that case we just create the cbmem toc.
*/
*(u32 *)CBMEM_BOOT_MODE = 0;
*(u32 *)CBMEM_RESUME_BACKUP = 0;
if (s3resume) {
void *resume_backup_memory = cbmem_find(CBMEM_ID_RESUME);
if (resume_backup_memory) {
*(u32 *)CBMEM_BOOT_MODE = 2;
*(u32 *)CBMEM_RESUME_BACKUP = (u32)resume_backup_memory;
}
acpi_prepare_for_resume();
/* Magic for S3 resume */
pci_write_config32(PCI_DEV(0, 0x00, 0), SKPAD, 0xcafed00d);
} else {

6
src/northbridge/intel/sandybridge/sandybridge.h
View File

@ -196,12 +196,6 @@
#define DMIDRCCFG 0xeb4 /* 32bit */
/* Delegation of resume backup memory so we don't have to
* (slowly) handle backing up OS memory in romstage.c
*/
#define CBMEM_BOOT_MODE 0x610
#define CBMEM_RESUME_BACKUP 0x614
#ifndef __ASSEMBLER__
static inline void barrier(void) { asm("" ::: "memory"); }