157 lines
5.9 KiB
C
157 lines
5.9 KiB
C
// Basic type definitions for X86 cpus.
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//
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// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
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//
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// This file may be distributed under the terms of the GNU LGPLv3 license.
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#ifndef __TYPES_H
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#define __TYPES_H
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typedef unsigned char u8;
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typedef signed char s8;
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typedef unsigned short u16;
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typedef signed short s16;
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typedef unsigned int u32;
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typedef signed int s32;
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typedef unsigned long long u64;
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typedef signed long long s64;
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typedef u32 size_t;
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union u64_u32_u {
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struct { u32 lo, hi; };
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u64 val;
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};
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// Definition for common 16bit segment/offset pointers.
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struct segoff_s {
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union {
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struct {
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u16 offset;
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u16 seg;
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};
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u32 segoff;
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};
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};
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#ifdef MANUAL_NO_JUMP_TABLE
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# define default case 775324556: asm(""); default
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#endif
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#ifdef WHOLE_PROGRAM
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# define __VISIBLE __attribute__((externally_visible))
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#else
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# define __VISIBLE
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#endif
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#define UNIQSEC __FILE__ "." __stringify(__LINE__)
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#define __noreturn __attribute__((noreturn))
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extern void __force_link_error__only_in_32bit_flat(void) __noreturn;
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extern void __force_link_error__only_in_32bit_segmented(void) __noreturn;
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extern void __force_link_error__only_in_16bit(void) __noreturn;
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#define __ASM(code) asm(".section .text.asm." UNIQSEC "\n\t" code)
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#if MODE16 == 1
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// Notes a function as externally visible in the 16bit code chunk.
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# define VISIBLE16 __VISIBLE
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// Notes a function as externally visible in the 32bit flat code chunk.
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# define VISIBLE32FLAT
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// Notes a 32bit flat function that will only be called during init.
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# define VISIBLE32INIT
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// Notes a function as externally visible in the 32bit segmented code chunk.
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# define VISIBLE32SEG
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// Designate a variable as (only) visible to 16bit code.
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# define VAR16 __section(".data16." UNIQSEC)
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// Designate a variable as (only) visible to 32bit segmented code.
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# define VAR32SEG __section(".discard.var32seg." UNIQSEC)
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// Designate a variable as visible and located in the e-segment.
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# define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak
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// Designate a variable as visible and located in the f-segment.
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# define VARFSEG __section(".discard.varfseg." UNIQSEC) __VISIBLE __weak
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// Designate a variable at a specific address in the f-segment.
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# define VARFSEGFIXED(addr) __section(".discard.varfixed." UNIQSEC) __VISIBLE __weak
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// Verify a variable is only accessible via 32bit "init" functions
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# define VARVERIFY32INIT __section(".discard.varinit." UNIQSEC)
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// Designate top-level assembler as 16bit only.
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# define ASM16(code) __ASM(code)
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// Designate top-level assembler as 32bit flat only.
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# define ASM32FLAT(code)
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// Compile time check for a given mode.
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# define ASSERT16() do { } while (0)
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# define ASSERT32SEG() __force_link_error__only_in_32bit_segmented()
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# define ASSERT32FLAT() __force_link_error__only_in_32bit_flat()
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#elif MODESEGMENT == 1
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# define VISIBLE16
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# define VISIBLE32FLAT
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# define VISIBLE32INIT
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# define VISIBLE32SEG __VISIBLE
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# define VAR16 __section(".discard.var16." UNIQSEC)
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# define VAR32SEG __section(".data32seg." UNIQSEC)
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# define VARLOW __section(".discard.varlow." UNIQSEC) __VISIBLE __weak
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# define VARFSEG __section(".discard.varfseg." UNIQSEC) __VISIBLE __weak
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# define VARFSEGFIXED(addr) __section(".discard.varfixed." UNIQSEC) __VISIBLE __weak
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# define VARVERIFY32INIT __section(".discard.varinit." UNIQSEC)
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# define ASM16(code)
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# define ASM32FLAT(code)
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# define ASSERT16() __force_link_error__only_in_16bit()
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# define ASSERT32SEG() do { } while (0)
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# define ASSERT32FLAT() __force_link_error__only_in_32bit_flat()
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#else
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# define VISIBLE16
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# define VISIBLE32FLAT __section(".text.runtime." UNIQSEC) __VISIBLE
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# define VISIBLE32INIT __section(".text.init." UNIQSEC) __VISIBLE
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# define VISIBLE32SEG
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# define VAR16 __section(".discard.var16." UNIQSEC)
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# define VAR32SEG __section(".discard.var32seg." UNIQSEC)
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# define VARLOW __section(".data.varlow." UNIQSEC) __VISIBLE __weak
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# define VARFSEG __section(".data.varfseg." UNIQSEC) __VISIBLE
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# define VARFSEGFIXED(addr) __section(".fixedaddr." __stringify(addr)) __VISIBLE __aligned(1)
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# define VARVERIFY32INIT __section(".data.varinit." UNIQSEC)
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# define ASM16(code)
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# define ASM32FLAT(code) __ASM(code)
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# define ASSERT16() __force_link_error__only_in_16bit()
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# define ASSERT32SEG() __force_link_error__only_in_32bit_segmented()
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# define ASSERT32FLAT() do { } while (0)
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#endif
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#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
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#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#define DIV_ROUND_CLOSEST(x, divisor)({ \
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typeof(divisor) __divisor = divisor; \
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(((x) + ((__divisor) / 2)) / (__divisor)); \
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})
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#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
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#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
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#define ALIGN_DOWN(x,a) ((x) & ~((typeof(x))(a)-1))
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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#define container_of_or_null(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *___mptr = (ptr); \
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___mptr ? container_of(___mptr, type, member) : NULL; })
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#define NULL ((void*)0)
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#define __weak __attribute__((weak))
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#define __section(S) __attribute__((section(S)))
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#define PACKED __attribute__((packed))
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#define __aligned(x) __attribute__((aligned(x)))
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#define barrier() __asm__ __volatile__("": : :"memory")
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#define noinline __attribute__((noinline))
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#define __always_inline inline __attribute__((always_inline))
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#define __malloc __attribute__((__malloc__))
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#define __attribute_const __attribute__((__const__))
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#define __stringify_1(x) #x
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#define __stringify(x) __stringify_1(x)
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#endif // types.h
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