diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2018-07-18 21:42:16 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2018-07-20 09:33:22 +0800 |
| commit | 474a62bc74fe923cd6f43e13ca82b1ce2f40e76f (patch) | |
| tree | 1dfaa8a9b44152b328ff87aa2637a3ce1c90a8e7 /arch/x86/cpu/cpu.c | |
| parent | a0609a8d19d4a9a86572fffb7cb8a3661fffbcf7 (diff) | |
| download | u-boot-474a62bc74fe923cd6f43e13ca82b1ce2f40e76f.tar.gz | |
x86: acpi: Don't touch ACPI hardware in write_acpi_tables()
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>
Diffstat (limited to 'arch/x86/cpu/cpu.c')
| -rw-r--r-- | arch/x86/cpu/cpu.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index d08b7d9b1e..290ee084e5 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -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 |