diff options
Diffstat (limited to 'qemu/roms/seabios/src/farptr.h')
| -rw-r--r-- | qemu/roms/seabios/src/farptr.h | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/qemu/roms/seabios/src/farptr.h b/qemu/roms/seabios/src/farptr.h deleted file mode 100644 index 0a4db68bf..000000000 --- a/qemu/roms/seabios/src/farptr.h +++ /dev/null @@ -1,208 +0,0 @@ -// Code to access multiple segments within gcc. -// -// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> -// -// This file may be distributed under the terms of the GNU LGPLv3 license. -#ifndef __FARPTR_H -#define __FARPTR_H - -#include "x86.h" // insb - -// Dummy definitions used to make sure gcc understands dependencies -// between SET_SEG and GET/READ/WRITE_SEG macros. -extern u16 __segment_ES, __segment_CS, __segment_DS, __segment_SS; -extern u16 __segment_FS, __segment_GS; - -// Low level macros for reading/writing memory via a segment selector. -#define READ8_SEG(prefix, SEG, value, var) \ - __asm__(prefix "movb %%" #SEG ":%1, %b0" : "=Qi"(value) \ - : "m"(var), "m"(__segment_ ## SEG)) -#define READ16_SEG(prefix, SEG, value, var) \ - __asm__(prefix "movw %%" #SEG ":%1, %w0" : "=ri"(value) \ - : "m"(var), "m"(__segment_ ## SEG)) -#define READ32_SEG(prefix, SEG, value, var) \ - __asm__(prefix "movl %%" #SEG ":%1, %0" : "=ri"(value) \ - : "m"(var), "m"(__segment_ ## SEG)) -#define READ64_SEG(prefix, SEG, value, var) do { \ - union u64_u32_u __value; \ - union u64_u32_u *__r64_ptr = (union u64_u32_u *)&(var); \ - READ32_SEG(prefix, SEG, __value.lo, __r64_ptr->lo); \ - READ32_SEG(prefix, SEG, __value.hi, __r64_ptr->hi); \ - *(u64*)&(value) = __value.val; \ - } while (0) -#define WRITE8_SEG(prefix, SEG, var, value) \ - __asm__(prefix "movb %b1, %%" #SEG ":%0" : "=m"(var) \ - : "Q"(value), "m"(__segment_ ## SEG)) -#define WRITE16_SEG(prefix, SEG, var, value) \ - __asm__(prefix "movw %w1, %%" #SEG ":%0" : "=m"(var) \ - : "r"(value), "m"(__segment_ ## SEG)) -#define WRITE32_SEG(prefix, SEG, var, value) \ - __asm__(prefix "movl %1, %%" #SEG ":%0" : "=m"(var) \ - : "r"(value), "m"(__segment_ ## SEG)) -#define WRITE64_SEG(prefix, SEG, var, value) do { \ - union u64_u32_u __value; \ - union u64_u32_u *__w64_ptr = (union u64_u32_u *)&(var); \ - typeof(var) __value_tmp = (value); \ - __value.val = *(u64*)&__value_tmp; \ - WRITE32_SEG(prefix, SEG, __w64_ptr->lo, __value.lo); \ - WRITE32_SEG(prefix, SEG, __w64_ptr->hi, __value.hi); \ - } while (0) - -// Macros for automatically choosing the appropriate memory size -// access method. -extern void __force_link_error__unknown_type(void); - -#define __GET_VAR(prefix, seg, var) ({ \ - typeof(var) __val; \ - if (sizeof(__val) == 1) \ - READ8_SEG(prefix, seg, __val, var); \ - else if (sizeof(__val) == 2) \ - READ16_SEG(prefix, seg, __val, var); \ - else if (sizeof(__val) == 4) \ - READ32_SEG(prefix, seg, __val, var); \ - else if (sizeof(__val) == 8) \ - READ64_SEG(prefix, seg, __val, var); \ - else \ - __force_link_error__unknown_type(); \ - __val; }) - -#define __SET_VAR(prefix, seg, var, val) do { \ - if (sizeof(var) == 1) \ - WRITE8_SEG(prefix, seg, var, (val)); \ - else if (sizeof(var) == 2) \ - WRITE16_SEG(prefix, seg, var, (val)); \ - else if (sizeof(var) == 4) \ - WRITE32_SEG(prefix, seg, var, (val)); \ - else if (sizeof(var) == 8) \ - WRITE64_SEG(prefix, seg, var, (val)); \ - else \ - __force_link_error__unknown_type(); \ - } while (0) - -#define DECL_SEGFUNCS(SEG) \ -static inline void __set_seg_##SEG(u16 seg) { \ - __asm__("movw %w1, %%" #SEG : "=m"(__segment_##SEG) \ - : "rm"(seg)); \ -} \ -static inline u16 __get_seg_##SEG(void) { \ - u16 res; \ - __asm__("movw %%" #SEG ", %w0" : "=rm"(res) \ - : "m"(__segment_##SEG)); \ - return res; \ -} -DECL_SEGFUNCS(CS) -DECL_SEGFUNCS(DS) -DECL_SEGFUNCS(ES) -DECL_SEGFUNCS(FS) -DECL_SEGFUNCS(GS) -DECL_SEGFUNCS(SS) - -// Low level macros for getting/setting a segment register. -#define __SET_SEG(SEG, value) \ - __set_seg_##SEG(value) -#define __GET_SEG(SEG) \ - __get_seg_##SEG() - -// Macros for accessing a variable in another segment. (They -// automatically update the %es segment and then make the appropriate -// access.) -#define __GET_FARVAR(seg, var) ({ \ - SET_SEG(ES, (seg)); \ - GET_VAR(ES, (var)); }) -#define __SET_FARVAR(seg, var, val) do { \ - typeof(var) __sfv_val = (val); \ - SET_SEG(ES, (seg)); \ - SET_VAR(ES, (var), __sfv_val); \ - } while (0) - -// Macros for accesssing a 32bit flat mode pointer from 16bit real -// mode. (They automatically update the %es segment, break the -// pointer into segment/offset, and then make the access.) -#define __GET_FLATPTR(ptr) ({ \ - typeof(&(ptr)) __ptr = &(ptr); \ - GET_FARVAR(FLATPTR_TO_SEG(__ptr) \ - , *(typeof(__ptr))FLATPTR_TO_OFFSET(__ptr)); }) -#define __SET_FLATPTR(ptr, val) do { \ - typeof (&(ptr)) __ptr = &(ptr); \ - SET_FARVAR(FLATPTR_TO_SEG(__ptr) \ - , *(typeof(__ptr))FLATPTR_TO_OFFSET(__ptr) \ - , (val)); \ - } while (0) - -// Macros for converting to/from 32bit flat mode pointers to their -// equivalent 16bit segment/offset values. -#define FLATPTR_TO_SEG(p) (((u32)(p)) >> 4) -#define FLATPTR_TO_OFFSET(p) (((u32)(p)) & 0xf) -#define MAKE_FLATPTR(seg,off) ((void*)(((u32)(seg)<<4)+(u32)(off))) - - -#if MODESEGMENT == 1 - -// Definitions when using segmented mode. -#define GET_FARVAR(seg, var) __GET_FARVAR((seg), (var)) -#define SET_FARVAR(seg, var, val) __SET_FARVAR((seg), (var), (val)) -#define GET_VAR(seg, var) __GET_VAR("", seg, (var)) -#define SET_VAR(seg, var, val) __SET_VAR("", seg, (var), (val)) -#define SET_SEG(SEG, value) __SET_SEG(SEG, (value)) -#define GET_SEG(SEG) __GET_SEG(SEG) -#define GET_FLATPTR(ptr) __GET_FLATPTR(ptr) -#define SET_FLATPTR(ptr, val) __SET_FLATPTR((ptr), (val)) - -static inline void insb_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - insb(port, (u8*)FLATPTR_TO_OFFSET(ptr_fl), count); -} -static inline void insw_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - insw(port, (u16*)FLATPTR_TO_OFFSET(ptr_fl), count); -} -static inline void insl_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - insl(port, (u32*)FLATPTR_TO_OFFSET(ptr_fl), count); -} -static inline void outsb_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - outsb(port, (u8*)FLATPTR_TO_OFFSET(ptr_fl), count); -} -static inline void outsw_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - outsw(port, (u16*)FLATPTR_TO_OFFSET(ptr_fl), count); -} -static inline void outsl_fl(u16 port, void *ptr_fl, u16 count) { - SET_SEG(ES, FLATPTR_TO_SEG(ptr_fl)); - outsl(port, (u32*)FLATPTR_TO_OFFSET(ptr_fl), count); -} - -#else - -// In 32-bit flat mode there is no need to mess with the segments. -#define GET_FARVAR(seg, var) \ - (*((typeof(&(var)))MAKE_FLATPTR((seg), &(var)))) -#define SET_FARVAR(seg, var, val) \ - do { GET_FARVAR((seg), (var)) = (val); } while (0) -#define GET_VAR(seg, var) (var) -#define SET_VAR(seg, var, val) do { (var) = (val); } while (0) -#define SET_SEG(SEG, value) ((void)(value)) -#define GET_SEG(SEG) 0 -#define GET_FLATPTR(ptr) (ptr) -#define SET_FLATPTR(ptr, val) do { (ptr) = (val); } while (0) - -#define insb_fl(port, ptr_fl, count) insb(port, ptr_fl, count) -#define insw_fl(port, ptr_fl, count) insw(port, ptr_fl, count) -#define insl_fl(port, ptr_fl, count) insl(port, ptr_fl, count) -#define outsb_fl(port, ptr_fl, count) outsb(port, ptr_fl, count) -#define outsw_fl(port, ptr_fl, count) outsw(port, ptr_fl, count) -#define outsl_fl(port, ptr_fl, count) outsl(port, ptr_fl, count) - -#endif - -#define SEGOFF(s,o) ({struct segoff_s __so; __so.offset=(o); __so.seg=(s); __so;}) - -static inline struct segoff_s FLATPTR_TO_SEGOFF(void *p) { - return SEGOFF(FLATPTR_TO_SEG(p), FLATPTR_TO_OFFSET(p)); -} -static inline void *SEGOFF_TO_FLATPTR(struct segoff_s so) { - return MAKE_FLATPTR(so.seg, so.offset); -} - -#endif // farptr.h |