| // Basic type definitions for X86 cpus. |
| // |
| // Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| #ifndef __TYPES_H |
| #define __TYPES_H |
| |
| typedef unsigned char u8; |
| typedef signed char s8; |
| typedef unsigned short u16; |
| typedef signed short s16; |
| typedef unsigned int u32; |
| typedef signed int s32; |
| typedef unsigned long long u64; |
| typedef signed long long s64; |
| typedef u32 size_t; |
| |
| union u64_u32_u { |
| struct { u32 lo, hi; }; |
| u64 val; |
| }; |
| |
| #ifdef MANUAL_NO_JUMP_TABLE |
| # define default case 775324556: asm(""); default |
| #endif |
| |
| #ifdef WHOLE_PROGRAM |
| # define __VISIBLE __attribute__((externally_visible)) |
| #else |
| # define __VISIBLE |
| #endif |
| |
| #define UNIQSEC __FILE__ "." __stringify(__LINE__) |
| |
| #define __noreturn __attribute__((noreturn)) |
| extern void __force_link_error__only_in_32bit_flat(void) __noreturn; |
| extern void __force_link_error__only_in_32bit_segmented(void) __noreturn; |
| extern void __force_link_error__only_in_16bit(void) __noreturn; |
| |
| #define __ASM(code) asm(".section .text.asm." UNIQSEC "\n\t" code) |
| |
| #if MODE16 == 1 |
| // Notes a function as externally visible in the 16bit code chunk. |
| # define VISIBLE16 __VISIBLE |
| // Notes a function as externally visible in the 32bit flat code chunk. |
| # define VISIBLE32FLAT |
| // Notes a 32bit flat function that will only be called during init. |
| # define VISIBLE32INIT |
| // Notes a function as externally visible in the 32bit segmented code chunk. |
| # define VISIBLE32SEG |
| // Designate a variable as (only) visible to 16bit code. |
| # define VAR16 __section(".data16." UNIQSEC) |
| // Designate a variable as visible to 16bit, 32bit, and assembler code. |
| # define VAR16VISIBLE VAR16 __VISIBLE |
| // Designate a variable as externally visible (in addition to all internal code). |
| # define VAR16EXPORT __section(".data16.export." UNIQSEC) __VISIBLE |
| // Designate a variable at a specific 16bit address |
| # define VAR16FIXED(addr) __aligned(1) __VISIBLE __section(".fixedaddr." __stringify(addr)) |
| // Designate a variable as (only) visible to 32bit segmented code. |
| # define VAR32SEG __section(".discard.var32seg." UNIQSEC) |
| // Designate a 32bit variable also available in 16bit "big real" mode. |
| # define VAR32FLATVISIBLE __section(".discard.var32flat." UNIQSEC) __VISIBLE __weak |
| // Designate a variable as visible and located in the e-segment. |
| # define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak |
| // Designate top-level assembler as 16bit only. |
| # define ASM16(code) __ASM(code) |
| // Designate top-level assembler as 32bit flat only. |
| # define ASM32FLAT(code) |
| // Compile time check for a given mode. |
| # define ASSERT16() do { } while (0) |
| # define ASSERT32SEG() __force_link_error__only_in_32bit_segmented() |
| # define ASSERT32FLAT() __force_link_error__only_in_32bit_flat() |
| #elif MODESEGMENT == 1 |
| # define VISIBLE16 |
| # define VISIBLE32FLAT |
| # define VISIBLE32INIT |
| # define VISIBLE32SEG __VISIBLE |
| # define VAR16 __section(".discard.var16." UNIQSEC) |
| # define VAR16VISIBLE VAR16 __VISIBLE __weak |
| # define VAR16EXPORT VAR16VISIBLE |
| # define VAR16FIXED(addr) VAR16VISIBLE |
| # define VAR32SEG __section(".data32seg." UNIQSEC) |
| # define VAR32FLATVISIBLE __section(".discard.var32flat." UNIQSEC) __VISIBLE __weak |
| # define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak |
| # define ASM16(code) |
| # define ASM32FLAT(code) |
| # define ASSERT16() __force_link_error__only_in_16bit() |
| # define ASSERT32SEG() do { } while (0) |
| # define ASSERT32FLAT() __force_link_error__only_in_32bit_flat() |
| #else |
| # define VISIBLE16 |
| # define VISIBLE32FLAT __section(".text.runtime." UNIQSEC) __VISIBLE |
| # define VISIBLE32INIT __section(".text.init." UNIQSEC) __VISIBLE |
| # define VISIBLE32SEG |
| # define VAR16 __section(".discard.var16." UNIQSEC) |
| # define VAR16VISIBLE VAR16 __VISIBLE __weak |
| # define VAR16EXPORT VAR16VISIBLE |
| # define VAR16FIXED(addr) VAR16VISIBLE |
| # define VAR32SEG __section(".discard.var32seg." UNIQSEC) |
| # define VAR32FLATVISIBLE __section(".data.runtime." UNIQSEC) __VISIBLE |
| # define VARLOW __section(".datalow." UNIQSEC) __VISIBLE |
| # define ASM16(code) |
| # define ASM32FLAT(code) __ASM(code) |
| # define ASSERT16() __force_link_error__only_in_16bit() |
| # define ASSERT32SEG() __force_link_error__only_in_32bit_segmented() |
| # define ASSERT32FLAT() do { } while (0) |
| #endif |
| |
| #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) |
| #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) |
| #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) |
| #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) |
| #define DIV_ROUND_CLOSEST(x, divisor)({ \ |
| typeof(divisor) __divisor = divisor; \ |
| (((x) + ((__divisor) / 2)) / (__divisor)); \ |
| }) |
| #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) |
| #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) |
| #define ALIGN_DOWN(x,a) ((x) & ~((typeof(x))(a)-1)) |
| #define container_of(ptr, type, member) ({ \ |
| const typeof( ((type *)0)->member ) *__mptr = (ptr); \ |
| (type *)( (char *)__mptr - offsetof(type,member) );}) |
| |
| #define likely(x) __builtin_expect(!!(x), 1) |
| #define unlikely(x) __builtin_expect(!!(x), 0) |
| |
| #define NULL ((void*)0) |
| |
| #define __weak __attribute__((weak)) |
| #define __section(S) __attribute__((section(S))) |
| |
| #define PACKED __attribute__((packed)) |
| #define __aligned(x) __attribute__((aligned(x))) |
| |
| #define barrier() __asm__ __volatile__("": : :"memory") |
| |
| #define noinline __attribute__((noinline)) |
| #define __always_inline inline __attribute__((always_inline)) |
| #define __malloc __attribute__((__malloc__)) |
| #define __attribute_const __attribute__((__const__)) |
| |
| #define __stringify_1(x) #x |
| #define __stringify(x) __stringify_1(x) |
| |
| #endif // types.h |