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x86: acpi: Don't touch ACPI hardware in write_acpi_tables()

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write_acpi_tables() currently touches ACPI hardware to switch to
ACPI mode at the end. Move such operation out of this function,
so that it only does what the function name tells us.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
Bin Meng 2018-07-18 21:42:16 -07:00
parent a0609a8d19
commit 474a62bc74
2 changed files with 18 additions and 14 deletions
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21
arch/x86/cpu/cpu.c
View file

@ -179,17 +179,32 @@ __weak void board_final_cleanup(void)
int last_stage_init(void)
{
struct acpi_fadt __maybe_unused *fadt;
board_final_cleanup();
#if CONFIG_HAVE_ACPI_RESUME
struct acpi_fadt *fadt = acpi_find_fadt();
#ifdef CONFIG_HAVE_ACPI_RESUME
fadt = acpi_find_fadt();
if (fadt != NULL && gd->arch.prev_sleep_state == ACPI_S3)
if (fadt && gd->arch.prev_sleep_state == ACPI_S3)
acpi_resume(fadt);
#endif
write_tables();
#ifdef CONFIG_GENERATE_ACPI_TABLE
fadt = acpi_find_fadt();
/* Don't touch ACPI hardware on HW reduced platforms */
if (fadt && !(fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)) {
/*
* Other than waiting for OSPM to request us to switch to ACPI
* mode, do it by ourselves, since SMI will not be triggered.
*/
enter_acpi_mode(fadt->pm1a_cnt_blk);
}
#endif
return 0;
}
#endif

11
arch/x86/lib/acpi_table.c
View file

@ -12,7 +12,6 @@
#include <dm/uclass-internal.h>
#include <version.h>
#include <asm/acpi/global_nvs.h>
#include <asm/acpi.h>
#include <asm/acpi_table.h>
#include <asm/ioapic.h>
#include <asm/lapic.h>
@ -444,16 +443,6 @@ ulong write_acpi_tables(ulong start)
acpi_rsdp_addr = (unsigned long)rsdp;
debug("ACPI: done\n");
/* Don't touch ACPI hardware on HW reduced platforms */
if (fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)
return current;
/*
* Other than waiting for OSPM to request us to switch to ACPI mode,
* do it by ourselves, since SMI will not be triggered.
*/
enter_acpi_mode(fadt->pm1a_cnt_blk);
return current;
}