1 // Basic type definitions for X86 cpus. 2 // 3 // Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net> 4 // 5 // This file may be distributed under the terms of the GNU LGPLv3 license. 6 #ifndef __TYPES_H 7 #define __TYPES_H 8 9 typedef unsigned char u8; 10 typedef signed char s8; 11 typedef unsigned short u16; 12 typedef signed short s16; 13 typedef unsigned int u32; 14 typedef signed int s32; 15 typedef unsigned long long u64; 16 typedef signed long long s64; 17 typedef u32 size_t; 18 19 union u64_u32_u { 20 struct { u32 lo, hi; }; 21 u64 val; 22 }; 23 24 // Definition for common 16bit segment/offset pointers. 25 struct segoff_s { 26 union { 27 struct { 28 u16 offset; 29 u16 seg; 30 }; 31 u32 segoff; 32 }; 33 }; 34 35 #ifdef MANUAL_NO_JUMP_TABLE 36 # define default case 775324556: asm(""); default 37 #endif 38 39 #ifdef WHOLE_PROGRAM 40 # define __VISIBLE __attribute__((externally_visible)) 41 #else 42 # define __VISIBLE 43 #endif 44 45 #define UNIQSEC __FILE__ "." __stringify(__LINE__) 46 47 #define __noreturn __attribute__((noreturn)) 48 extern void __force_link_error__only_in_32bit_flat(void) __noreturn; 49 extern void __force_link_error__only_in_32bit_segmented(void) __noreturn; 50 extern void __force_link_error__only_in_16bit(void) __noreturn; 51 52 #define __ASM(code) asm(".section .text.asm." UNIQSEC "\n\t" code) 53 54 #if MODE16 == 1 55 // Notes a function as externally visible in the 16bit code chunk. 56 # define VISIBLE16 __VISIBLE 57 // Notes a function as externally visible in the 32bit flat code chunk. 58 # define VISIBLE32FLAT 59 // Notes a 32bit flat function that will only be called during init. 60 # define VISIBLE32INIT 61 // Notes a function as externally visible in the 32bit segmented code chunk. 62 # define VISIBLE32SEG 63 // Designate a variable as (only) visible to 16bit code. 64 # define VAR16 __section(".data16." UNIQSEC) 65 // Designate a variable as (only) visible to 32bit segmented code. 66 # define VAR32SEG __section(".discard.var32seg." UNIQSEC) 67 // Designate a variable as visible and located in the e-segment. 68 # define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak 69 // Designate a variable as visible and located in the f-segment. 70 # define VARFSEG __section(".discard.varfseg." UNIQSEC) __VISIBLE __weak 71 // Designate a variable at a specific address in the f-segment. 72 # define VARFSEGFIXED(addr) __section(".discard.varfixed." UNIQSEC) __VISIBLE __weak 73 // Verify a variable is only accessible via 32bit "init" functions 74 # define VARVERIFY32INIT __section(".discard.varinit." UNIQSEC) 75 // Designate top-level assembler as 16bit only. 76 # define ASM16(code) __ASM(code) 77 // Designate top-level assembler as 32bit flat only. 78 # define ASM32FLAT(code) 79 // Compile time check for a given mode. 80 # define ASSERT16() do { } while (0) 81 # define ASSERT32SEG() __force_link_error__only_in_32bit_segmented() 82 # define ASSERT32FLAT() __force_link_error__only_in_32bit_flat() 83 #elif MODESEGMENT == 1 84 # define VISIBLE16 85 # define VISIBLE32FLAT 86 # define VISIBLE32INIT 87 # define VISIBLE32SEG __VISIBLE 88 # define VAR16 __section(".discard.var16." UNIQSEC) 89 # define VAR32SEG __section(".data32seg." UNIQSEC) 90 # define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak 91 # define VARFSEG __section(".discard.varfseg." UNIQSEC) __VISIBLE __weak 92 # define VARFSEGFIXED(addr) __section(".discard.varfixed." UNIQSEC) __VISIBLE __weak 93 # define VARVERIFY32INIT __section(".discard.varinit." UNIQSEC) 94 # define ASM16(code) 95 # define ASM32FLAT(code) 96 # define ASSERT16() __force_link_error__only_in_16bit() 97 # define ASSERT32SEG() do { } while (0) 98 # define ASSERT32FLAT() __force_link_error__only_in_32bit_flat() 99 #else 100 # define VISIBLE16 101 # define VISIBLE32FLAT __section(".text.runtime." UNIQSEC) __VISIBLE 102 # define VISIBLE32INIT __section(".text.init." UNIQSEC) __VISIBLE 103 # define VISIBLE32SEG 104 # define VAR16 __section(".discard.var16." UNIQSEC) 105 # define VAR32SEG __section(".discard.var32seg." UNIQSEC) 106 # define VARLOW __section(".data.varlow." UNIQSEC) __VISIBLE __weak 107 # define VARFSEG __section(".data.varfseg." UNIQSEC) __VISIBLE 108 # define VARFSEGFIXED(addr) __section(".fixedaddr." __stringify(addr)) __VISIBLE __aligned(1) 109 # define VARVERIFY32INIT __section(".data.varinit." UNIQSEC) 110 # define ASM16(code) 111 # define ASM32FLAT(code) __ASM(code) 112 # define ASSERT16() __force_link_error__only_in_16bit() 113 # define ASSERT32SEG() __force_link_error__only_in_32bit_segmented() 114 # define ASSERT32FLAT() do { } while (0) 115 #endif 116 117 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 118 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) 119 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) 120 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 121 #define DIV_ROUND_CLOSEST(x, divisor)({ \ 122 typeof(divisor) __divisor = divisor; \ 123 (((x) + ((__divisor) / 2)) / (__divisor)); \ 124 }) 125 #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) 126 #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) 127 #define ALIGN_DOWN(x,a) ((x) & ~((typeof(x))(a)-1)) 128 #define container_of(ptr, type, member) ({ \ 129 const typeof( ((type *)0)->member ) *__mptr = (ptr); \ 130 (type *)( (char *)__mptr - offsetof(type,member) );}) 131 #define container_of_or_null(ptr, type, member) ({ \ 132 const typeof( ((type *)0)->member ) *___mptr = (ptr); \ 133 ___mptr ? container_of(___mptr, type, member) : NULL; }) 134 135 #define likely(x) __builtin_expect(!!(x), 1) 136 #define unlikely(x) __builtin_expect(!!(x), 0) 137 138 #define NULL ((void*)0) 139 140 #define __weak __attribute__((weak)) 141 #define __section(S) __attribute__((section(S))) 142 143 #define PACKED __attribute__((packed)) 144 #define __aligned(x) __attribute__((aligned(x))) 145 146 #define barrier() __asm__ __volatile__("": : :"memory") 147 148 #define noinline __attribute__((noinline)) 149 #define __always_inline inline __attribute__((always_inline)) 150 #define __malloc __attribute__((__malloc__)) 151 #define __attribute_const __attribute__((__const__)) 152 153 #define __stringify_1(x) #x 154 #define __stringify(x) __stringify_1(x) 155 156 #endif // types.h 157