projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4fc2fba8 PM |
1 | /* |
| 2 | * sleep.c - x86-specific ACPI sleep support. | |
| 3 | * | |
| 4 | * Copyright (C) 2001-2003 Patrick Mochel | |
| a2531293 | 5 | * Copyright (C) 2001-2003 Pavel Machek <pavel@ucw.cz> |
| 4fc2fba8 PM |
6 | */ |
| 7 | ||
| 8 | #include <linux/acpi.h> | |
| 9 | #include <linux/bootmem.h> | |
| a9ce6bc1 | 10 | #include <linux/memblock.h> |
| 4fc2fba8 PM |
11 | #include <linux/dmi.h> |
| 12 | #include <linux/cpumask.h> | |
| 4fdf08b5 | 13 | #include <asm/segment.h> |
| 3038edab | 14 | #include <asm/desc.h> |
| b40827fa | 15 | #include <asm/pgtable.h> |
| d344e38b | 16 | #include <asm/cacheflush.h> |
| c9b77ccb | 17 | #include <asm/realmode.h> |
| b40827fa | 18 | |
| c4845474 | 19 | #include "../../realmode/rm/wakeup.h" |
| e44b7b75 | 20 | #include "sleep.h" |
| 4fc2fba8 | 21 | |
| 4fc2fba8 | 22 | unsigned long acpi_realmode_flags; |
| 4fc2fba8 | 23 | |
| 9744f5a3 | 24 | #if defined(CONFIG_SMP) && defined(CONFIG_64BIT) |
| 5000cadc | 25 | static char temp_stack[4096]; |
| e44b7b75 | 26 | #endif |
| 4fc2fba8 PM |
27 | |
| 28 | /** | |
| f1a2003e | 29 | * acpi_suspend_lowlevel - save kernel state |
| 4fc2fba8 PM |
30 | * |
| 31 | * Create an identity mapped page table and copy the wakeup routine to | |
| 32 | * low memory. | |
| 33 | */ | |
| f1a2003e | 34 | int acpi_suspend_lowlevel(void) |
| 4fc2fba8 | 35 | { |
| c9b77ccb | 36 | struct wakeup_header *header = |
| b429dbf6 | 37 | (struct wakeup_header *) __va(real_mode_header->wakeup_header); |
| e44b7b75 | 38 | |
| d1ee4335 | 39 | if (header->signature != WAKEUP_HEADER_SIGNATURE) { |
| e44b7b75 PM |
40 | printk(KERN_ERR "wakeup header does not match\n"); |
| 41 | return -EINVAL; | |
| 42 | } | |
| 43 | ||
| 44 | header->video_mode = saved_video_mode; | |
| 45 | ||
| 73201dbe PA |
46 | header->pmode_behavior = 0; |
| 47 | ||
| e44b7b75 | 48 | #ifndef CONFIG_64BIT |
| 357d1226 | 49 | native_store_gdt((struct desc_ptr *)&header->pmode_gdt); |
| e44b7b75 | 50 | |
| 73201dbe PA |
51 | if (!rdmsr_safe(MSR_EFER, |
| 52 | &header->pmode_efer_low, | |
| 53 | &header->pmode_efer_high)) | |
| 54 | header->pmode_behavior |= (1 << WAKEUP_BEHAVIOR_RESTORE_EFER); | |
| e44b7b75 PM |
55 | #endif /* !CONFIG_64BIT */ |
| 56 | ||
| 57 | header->pmode_cr0 = read_cr0(); | |
| 73201dbe PA |
58 | if (__this_cpu_read(cpu_info.cpuid_level) >= 0) { |
| 59 | header->pmode_cr4 = read_cr4(); | |
| 60 | header->pmode_behavior |= (1 << WAKEUP_BEHAVIOR_RESTORE_CR4); | |
| 61 | } | |
| 7a313666 KC |
62 | if (!rdmsr_safe(MSR_IA32_MISC_ENABLE, |
| 63 | &header->pmode_misc_en_low, | |
| 64 | &header->pmode_misc_en_high)) | |
| 65 | header->pmode_behavior |= | |
| 66 | (1 << WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE); | |
| e44b7b75 PM |
67 | header->realmode_flags = acpi_realmode_flags; |
| 68 | header->real_magic = 0x12345678; | |
| 69 | ||
| 70 | #ifndef CONFIG_64BIT | |
| 71 | header->pmode_entry = (u32)&wakeup_pmode_return; | |
| afd51a0e | 72 | header->pmode_cr3 = (u32)__pa_symbol(initial_page_table); |
| e44b7b75 PM |
73 | saved_magic = 0x12345678; |
| 74 | #else /* CONFIG_64BIT */ | |
| 1ea598c2 | 75 | #ifdef CONFIG_SMP |
| 11d4c3f9 | 76 | stack_start = (unsigned long)temp_stack + sizeof(temp_stack); |
| 3038edab RW |
77 | early_gdt_descr.address = |
| 78 | (unsigned long)get_cpu_gdt_table(smp_processor_id()); | |
| 004aa322 | 79 | initial_gs = per_cpu_offset(smp_processor_id()); |
| 1ea598c2 | 80 | #endif |
| e44b7b75 | 81 | initial_code = (unsigned long)wakeup_long64; |
| ce4b3c55 | 82 | saved_magic = 0x123456789abcdef0L; |
| e44b7b75 | 83 | #endif /* CONFIG_64BIT */ |
| 4fc2fba8 | 84 | |
| f1a2003e | 85 | do_suspend_lowlevel(); |
| 4fc2fba8 PM |
86 | return 0; |
| 87 | } | |
| 88 | ||
| 4fc2fba8 PM |
89 | static int __init acpi_sleep_setup(char *str) |
| 90 | { | |
| 91 | while ((str != NULL) && (*str != '\0')) { | |
| 92 | if (strncmp(str, "s3_bios", 7) == 0) | |
| 93 | acpi_realmode_flags |= 1; | |
| 94 | if (strncmp(str, "s3_mode", 7) == 0) | |
| 95 | acpi_realmode_flags |= 2; | |
| 96 | if (strncmp(str, "s3_beep", 7) == 0) | |
| 97 | acpi_realmode_flags |= 4; | |
| bdfe6b7c SL |
98 | #ifdef CONFIG_HIBERNATION |
| 99 | if (strncmp(str, "s4_nohwsig", 10) == 0) | |
| 100 | acpi_no_s4_hw_signature(); | |
| 101 | #endif | |
| 72ad5d77 RW |
102 | if (strncmp(str, "nonvs", 5) == 0) |
| 103 | acpi_nvs_nosave(); | |
| 1bad2f19 KCA |
104 | if (strncmp(str, "nonvs_s3", 8) == 0) |
| 105 | acpi_nvs_nosave_s3(); | |
| d8f3de0d RW |
106 | if (strncmp(str, "old_ordering", 12) == 0) |
| 107 | acpi_old_suspend_ordering(); | |
| 4fc2fba8 PM |
108 | str = strchr(str, ','); |
| 109 | if (str != NULL) | |
| 110 | str += strspn(str, ", \t"); | |
| 111 | } | |
| 112 | return 1; | |
| 113 | } | |
| 114 | ||
| 115 | __setup("acpi_sleep=", acpi_sleep_setup); |