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ACPI S3: Move SMP trampoline recovery 

No need to make low memory backup unless we are on
S3 resume path.
Hide those details from ACPI.

Change-Id: Ic08b6d70c7895b094afdb3c77e020ff37ad632a1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15241
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Kyösti Mälkki 2016-06-16 00:40:16 +03:00
parent 65cc526f6f
commit a16cd9cdda
2 changed files with 24 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/arch/x86/acpi.c
View File

@ -1127,12 +1127,6 @@ void *acpi_find_wakeup_vector(void)
return wake_vec;
}
#if CONFIG_SMP
extern char *lowmem_backup;
extern char *lowmem_backup_ptr;
extern int lowmem_backup_size;
#endif
#define WAKEUP_BASE 0x600
void (*acpi_do_wakeup)(uintptr_t vector, u32 backup_source, u32 backup_target,
@ -1155,15 +1149,6 @@ void acpi_jump_to_wakeup(void *vector)
}
}
#if CONFIG_SMP
// FIXME: This should go into the ACPI backup memory, too. No pork sausages.
/*
* Just restore the SMP trampoline and continue with wakeup on
* assembly level.
*/
memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);
#endif
/* Copy wakeup trampoline in place. */
memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size);

38
src/cpu/x86/lapic/lapic_cpu_init.c
View File

@ -20,6 +20,7 @@
#include <cpu/x86/cr.h>
#include <cpu/x86/gdt.h>
#include <cpu/x86/lapic.h>
#include <arch/acpi.h>
#include <delay.h>
#include <halt.h>
#include <lib.h>
@ -46,11 +47,9 @@
/* Start-UP IPI vector must be 4kB aligned and below 1MB. */
#define AP_SIPI_VECTOR 0x1000
#if CONFIG_HAVE_ACPI_RESUME
char *lowmem_backup;
char *lowmem_backup_ptr;
int lowmem_backup_size;
#endif
static char *lowmem_backup;
static char *lowmem_backup_ptr;
static int lowmem_backup_size;
static inline void setup_secondary_gdt(void)
{
@ -77,17 +76,18 @@ static void copy_secondary_start_to_lowest_1M(void)
code_size = (unsigned long)_secondary_start_end - (unsigned long)_secondary_start;
#if CONFIG_HAVE_ACPI_RESUME
/* need to save it for RAM resume */
lowmem_backup_size = code_size;
lowmem_backup = malloc(code_size);
lowmem_backup_ptr = (char *)AP_SIPI_VECTOR;
if (acpi_is_wakeup_s3()) {
/* need to save it for RAM resume */
lowmem_backup_size = code_size;
lowmem_backup = malloc(code_size);
lowmem_backup_ptr = (char *)AP_SIPI_VECTOR;
if (lowmem_backup == NULL)
die("Out of backup memory\n");
if (lowmem_backup == NULL)
die("Out of backup memory\n");
memcpy(lowmem_backup, lowmem_backup_ptr, lowmem_backup_size);
}
memcpy(lowmem_backup, lowmem_backup_ptr, lowmem_backup_size);
#endif
/* copy the _secondary_start to the ram below 1M*/
memcpy((unsigned char *)AP_SIPI_VECTOR, (unsigned char *)_secondary_start, code_size);
@ -95,6 +95,12 @@ static void copy_secondary_start_to_lowest_1M(void)
(long unsigned int)AP_SIPI_VECTOR, code_size);
}
static void recover_lowest_1M(void)
{
if (acpi_is_wakeup_s3())
memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);
}
static int lapic_start_cpu(unsigned long apicid)
{
int timeout;
@ -592,4 +598,8 @@ void initialize_cpus(struct bus *cpu_bus)
smm_other_cpus(cpu_bus, info->cpu);
#endif
}
#if CONFIG_SMP && CONFIG_MAX_CPUS > 1
recover_lowest_1M();
#endif
}