| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _ARCH_X86_REALMODE_H |
| 3 | #define _ARCH_X86_REALMODE_H |
| 4 | |
| 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 | |
| 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; |
| 21 | /* SMP trampoline */ |
| 22 | u32 trampoline_start; |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 23 | u32 trampoline_header; |
| 24 | #ifdef CONFIG_X86_64 |
| 25 | u32 trampoline_pgd; |
| 26 | #endif |
| 27 | /* ACPI S3 wakeup */ |
| 28 | #ifdef CONFIG_ACPI_SLEEP |
| 29 | u32 wakeup_start; |
| 30 | u32 wakeup_header; |
| 31 | #endif |
| 32 | /* APM/BIOS reboot */ |
| 33 | u32 machine_real_restart_asm; |
| 34 | #ifdef CONFIG_X86_64 |
| 35 | u32 machine_real_restart_seg; |
| 36 | #endif |
| 37 | }; |
| 38 | |
| 39 | /* This must match data at trampoline_32/64.S */ |
| 40 | struct trampoline_header { |
| 41 | #ifdef CONFIG_X86_32 |
| 42 | u32 start; |
| 43 | u16 gdt_pad; |
| 44 | u16 gdt_limit; |
| 45 | u32 gdt_base; |
| 46 | #else |
| 47 | u64 start; |
| 48 | u64 efer; |
| 49 | u32 cr4; |
| 50 | u32 flags; |
| 51 | #endif |
| 52 | }; |
| 53 | |
| 54 | extern struct real_mode_header *real_mode_header; |
| 55 | extern unsigned char real_mode_blob_end[]; |
| 56 | |
| 57 | extern unsigned long initial_code; |
| 58 | extern unsigned long initial_gs; |
| 59 | extern unsigned long initial_stack; |
| 60 | |
| 61 | extern unsigned char real_mode_blob[]; |
| 62 | extern unsigned char real_mode_relocs[]; |
| 63 | |
| 64 | #ifdef CONFIG_X86_32 |
| 65 | extern unsigned char startup_32_smp[]; |
| 66 | extern unsigned char boot_gdt[]; |
| 67 | #else |
| 68 | extern unsigned char secondary_startup_64[]; |
| 69 | #endif |
| 70 | |
| 71 | static inline size_t real_mode_size_needed(void) |
| 72 | { |
| 73 | if (real_mode_header) |
| 74 | return 0; /* already allocated. */ |
| 75 | |
| 76 | return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE); |
| 77 | } |
| 78 | |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 79 | static inline void set_real_mode_mem(phys_addr_t mem) |
| 80 | { |
| 81 | real_mode_header = (struct real_mode_header *) __va(mem); |
| 82 | } |
| 83 | |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 84 | void reserve_real_mode(void); |
| 85 | |
| 86 | #endif /* __ASSEMBLY__ */ |
| 87 | |
| 88 | #endif /* _ARCH_X86_REALMODE_H */ |