projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 084ee1c6 JS |
2 | #ifndef _ARCH_X86_REALMODE_H |
| 3 | #define _ARCH_X86_REALMODE_H | |
| 4 | ||
| 46d010e0 TL |
5 | /* |
| 6 | * Flag bit definitions for use with the flags field of the trampoline header | |
| 7 | * in the CONFIG_X86_64 variant. | |
| 8 | */ | |
| 9 | #define TH_FLAGS_SME_ACTIVE_BIT 0 | |
| 10 | #define TH_FLAGS_SME_ACTIVE BIT(TH_FLAGS_SME_ACTIVE_BIT) | |
| 11 | ||
| 12 | #ifndef __ASSEMBLY__ | |
| 13 | ||
| 084ee1c6 JS |
14 | #include <linux/types.h> |
| 15 | #include <asm/io.h> | |
| 16 | ||
| 17 | /* This must match data at realmode.S */ | |
| 18 | struct real_mode_header { | |
| 19 | u32 text_start; | |
| 20 | u32 ro_end; | |
| 48927bbb | 21 | /* SMP trampoline */ |
| f37240f1 | 22 | u32 trampoline_start; |
| 48927bbb | 23 | u32 trampoline_status; |
| f37240f1 JS |
24 | u32 trampoline_header; |
| 25 | #ifdef CONFIG_X86_64 | |
| 26 | u32 trampoline_pgd; | |
| 5a8c9aeb | 27 | #endif |
| f37240f1 | 28 | /* ACPI S3 wakeup */ |
| c9b77ccb JS |
29 | #ifdef CONFIG_ACPI_SLEEP |
| 30 | u32 wakeup_start; | |
| 31 | u32 wakeup_header; | |
| f37240f1 JS |
32 | #endif |
| 33 | /* APM/BIOS reboot */ | |
| f37240f1 | 34 | u32 machine_real_restart_asm; |
| 65051397 PA |
35 | #ifdef CONFIG_X86_64 |
| 36 | u32 machine_real_restart_seg; | |
| f37240f1 | 37 | #endif |
| cda846f1 | 38 | }; |
| f37240f1 JS |
39 | |
| 40 | /* This must match data at trampoline_32/64.S */ | |
| 41 | struct trampoline_header { | |
| 42 | #ifdef CONFIG_X86_32 | |
| 43 | u32 start; | |
| cda846f1 | 44 | u16 gdt_pad; |
| f37240f1 JS |
45 | u16 gdt_limit; |
| 46 | u32 gdt_base; | |
| 47 | #else | |
| 48 | u64 start; | |
| 638d957b | 49 | u64 efer; |
| cda846f1 | 50 | u32 cr4; |
| 46d010e0 | 51 | u32 flags; |
| c9b77ccb | 52 | #endif |
| cda846f1 | 53 | }; |
| 084ee1c6 | 54 | |
| b429dbf6 JS |
55 | extern struct real_mode_header *real_mode_header; |
| 56 | extern unsigned char real_mode_blob_end[]; | |
| 084ee1c6 | 57 | |
| 084ee1c6 JS |
58 | extern unsigned long initial_code; |
| 59 | extern unsigned long initial_gs; | |
| b32f96c7 | 60 | extern unsigned long initial_stack; |
| 084ee1c6 JS |
61 | |
| 62 | extern unsigned char real_mode_blob[]; | |
| 63 | extern unsigned char real_mode_relocs[]; | |
| 64 | ||
| 48927bbb JS |
65 | #ifdef CONFIG_X86_32 |
| 66 | extern unsigned char startup_32_smp[]; | |
| 67 | extern unsigned char boot_gdt[]; | |
| 68 | #else | |
| 69 | extern unsigned char secondary_startup_64[]; | |
| 70 | #endif | |
| 71 | ||
| 5ff3e2c3 AL |
72 | static inline size_t real_mode_size_needed(void) |
| 73 | { | |
| 74 | if (real_mode_header) | |
| 75 | return 0; /* already allocated. */ | |
| 76 | ||
| 77 | return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); | |
| 78 | } | |
| 79 | ||
| 80 | void set_real_mode_mem(phys_addr_t mem, size_t size); | |
| 4f7b9226 | 81 | void reserve_real_mode(void); |
| 084ee1c6 | 82 | |
| 46d010e0 TL |
83 | #endif /* __ASSEMBLY__ */ |
| 84 | ||
| 084ee1c6 | 85 | #endif /* _ARCH_X86_REALMODE_H */ |