From d132c996a64950ed1c537d8fcfab691e9290c746 Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Sat, 18 Jun 2016 09:19:18 +0300 Subject: ACPI S3: Split support for HAVE_ACPI_RESUME MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Some of the support functions will be built for romstage once HIGH_MEMORY_SAVE is removed. Change-Id: I43ed9067cf6b2152a354088c1dcb02d374eb6efe Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/15242 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- src/arch/x86/acpi_s3.c | 146 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 src/arch/x86/acpi_s3.c (limited to 'src/arch/x86/acpi_s3.c') diff --git a/src/arch/x86/acpi_s3.c b/src/arch/x86/acpi_s3.c new file mode 100644 index 0000000000..8db906a476 --- /dev/null +++ b/src/arch/x86/acpi_s3.c @@ -0,0 +1,146 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2005-2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* This is filled with acpi_is_wakeup() call early in ramstage. */ +int acpi_slp_type = -1; + +#if IS_ENABLED(CONFIG_EARLY_CBMEM_INIT) +int acpi_get_sleep_type(void) +{ + struct romstage_handoff *handoff; + + handoff = cbmem_find(CBMEM_ID_ROMSTAGE_INFO); + + if (handoff == NULL) { + printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n"); + return 0; + } else if (handoff->s3_resume) { + printk(BIOS_DEBUG, "S3 Resume.\n"); + return 3; + } else { + printk(BIOS_DEBUG, "Normal boot.\n"); + return 0; + } +} +#endif + +static void acpi_handoff_wakeup(void) +{ + if (acpi_slp_type < 0) + acpi_slp_type = acpi_get_sleep_type(); +} + +int acpi_is_wakeup(void) +{ + acpi_handoff_wakeup(); + /* Both resume from S2 and resume from S3 restart at CPU reset */ + return (acpi_slp_type == 3 || acpi_slp_type == 2); +} + +int acpi_is_wakeup_s3(void) +{ + acpi_handoff_wakeup(); + return (acpi_slp_type == 3); +} + +int acpi_is_wakeup_s4(void) +{ + acpi_handoff_wakeup(); + return (acpi_slp_type == 4); +} + +void acpi_fail_wakeup(void) +{ + if (acpi_slp_type == 3 || acpi_slp_type == 2) + acpi_slp_type = 0; +} + +void acpi_prepare_resume_backup(void) +{ + if (!acpi_s3_resume_allowed()) + return; + + /* Let's prepare the ACPI S3 Resume area now already, so we can rely on + * it being there during reboot time. We don't need the pointer, nor + * the result right now. If it fails, ACPI resume will be disabled. + */ + + if (HIGH_MEMORY_SAVE) + cbmem_add(CBMEM_ID_RESUME, HIGH_MEMORY_SAVE); +} + +#define WAKEUP_BASE 0x600 + +void (*acpi_do_wakeup)(uintptr_t vector, u32 backup_source, u32 backup_target, + u32 backup_size) asmlinkage = (void *)WAKEUP_BASE; + +extern unsigned char __wakeup; +extern unsigned int __wakeup_size; + +static void acpi_jump_to_wakeup(void *vector) +{ + uintptr_t acpi_backup_memory = 0; + + if (HIGH_MEMORY_SAVE && acpi_s3_resume_allowed()) { + acpi_backup_memory = (uintptr_t)cbmem_find(CBMEM_ID_RESUME); + + if (!acpi_backup_memory) { + printk(BIOS_WARNING, "ACPI: Backup memory missing. " + "No S3 resume.\n"); + return; + } + } + + /* Copy wakeup trampoline in place. */ + memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size); + + timestamp_add_now(TS_ACPI_WAKE_JUMP); + + acpi_do_wakeup((uintptr_t)vector, acpi_backup_memory, CONFIG_RAMBASE, + HIGH_MEMORY_SAVE); +} + +void __attribute__((weak)) mainboard_suspend_resume(void) +{ +} + +void acpi_resume(void *wake_vec) +{ +#if CONFIG_HAVE_SMI_HANDLER + u32 *gnvs_address = cbmem_find(CBMEM_ID_ACPI_GNVS_PTR); + + /* Restore GNVS pointer in SMM if found */ + if (gnvs_address && *gnvs_address) { + printk(BIOS_DEBUG, "Restore GNVS pointer to 0x%08x\n", + *gnvs_address); + smm_setup_structures((void *)*gnvs_address, NULL, NULL); + } +#endif + + /* Call mainboard resume handler first, if defined. */ + mainboard_suspend_resume(); + + post_code(POST_OS_RESUME); + acpi_jump_to_wakeup(wake_vec); +} -- cgit v1.2.3