projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 0ca2426b SG |
2 | /* |
| 3 | * From Coreboot file device/oprom/realmode/x86.h | |
| 4 | * | |
| 5 | * Copyright (C) 2007 Advanced Micro Devices, Inc. | |
| 6 | * Copyright (C) 2009-2010 coresystems GmbH | |
| 0ca2426b SG |
7 | */ |
| 8 | ||
| 9 | #ifndef _X86_LIB_BIOS_H | |
| 10 | #define _X86_LIB_BIOS_H | |
| 11 | ||
| e6126a58 MY |
12 | #include <linux/linkage.h> |
| 13 | ||
| 0ca2426b SG |
14 | #define REALMODE_BASE 0x600 |
| 15 | ||
| 16 | #ifdef __ASSEMBLY__ | |
| 17 | ||
| 18 | #define PTR_TO_REAL_MODE(x) (x - asm_realmode_code + REALMODE_BASE) | |
| 19 | ||
| 20 | #else | |
| 21 | ||
| 22 | /* Convert a symbol address to our real mode area */ | |
| 23 | #define PTR_TO_REAL_MODE(sym)\ | |
| 24 | (void *)(REALMODE_BASE + ((char *)&(sym) - (char *)&asm_realmode_code)) | |
| 25 | ||
| 26 | /* | |
| 27 | * The following symbols cannot be used directly. They need to be fixed up | |
| 28 | * to point to the correct address location after the code has been copied | |
| 29 | * to REALMODE_BASE. Absolute symbols are not used because those symbols are | |
| 30 | * relocated by U-Boot. | |
| 31 | */ | |
| 32 | extern unsigned char asm_realmode_call, __realmode_interrupt; | |
| 33 | extern unsigned char asm_realmode_buffer; | |
| 34 | ||
| 35 | #define DOWNTO8(A) \ | |
| 36 | union { \ | |
| 37 | struct { \ | |
| 38 | union { \ | |
| 39 | struct { \ | |
| 40 | uint8_t A##l; \ | |
| 41 | uint8_t A##h; \ | |
| 42 | } __packed; \ | |
| 43 | uint16_t A##x; \ | |
| 44 | } __packed; \ | |
| 45 | uint16_t h##A##x; \ | |
| 46 | } __packed; \ | |
| 47 | uint32_t e##A##x; \ | |
| 48 | } __packed; | |
| 49 | ||
| 50 | #define DOWNTO16(A) \ | |
| 51 | union { \ | |
| 52 | struct { \ | |
| 53 | uint16_t A; \ | |
| 54 | uint16_t h##A; \ | |
| 55 | } __packed; \ | |
| 56 | uint32_t e##A; \ | |
| 57 | } __packed; | |
| 58 | ||
| 59 | struct eregs { | |
| 60 | DOWNTO8(a); | |
| 61 | DOWNTO8(c); | |
| 62 | DOWNTO8(d); | |
| 63 | DOWNTO8(b); | |
| 64 | DOWNTO16(sp); | |
| 65 | DOWNTO16(bp); | |
| 66 | DOWNTO16(si); | |
| 67 | DOWNTO16(di); | |
| 68 | uint32_t vector; | |
| 69 | uint32_t error_code; | |
| 70 | uint32_t eip; | |
| 71 | uint32_t cs; | |
| 72 | uint32_t eflags; | |
| 73 | }; | |
| 74 | ||
| 75 | struct realmode_idt { | |
| 76 | u16 offset, cs; | |
| 77 | }; | |
| 78 | ||
| 79 | void x86_exception(struct eregs *info); | |
| 80 | ||
| 81 | /* From x86_asm.S */ | |
| 82 | extern unsigned char __idt_handler; | |
| 83 | extern unsigned int __idt_handler_size; | |
| 84 | extern unsigned char asm_realmode_code; | |
| 85 | extern unsigned int asm_realmode_code_size; | |
| 86 | ||
| 87 | asmlinkage void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx, | |
| 88 | u32 esi, u32 edi); | |
| 89 | ||
| 90 | asmlinkage void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx, | |
| 91 | u32 edx, u32 esi, u32 edi); | |
| 92 | ||
| 93 | int int10_handler(void); | |
| 94 | int int12_handler(void); | |
| 95 | int int16_handler(void); | |
| 96 | int int1a_handler(void); | |
| 97 | #endif /*__ASSEMBLY__ */ | |
| 98 | ||
| 99 | #endif |