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| author | Kevin O'Connor <kevin@koconnor.net> | 2008-02-25 22:29:55 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2008-02-25 22:29:55 -0500 |
| commit | 4b60c000deee2002ba272b45a1121df7495c39f9 (patch) | |
| tree | 15b897b77d26f30a52d13605c905e6fd42b3e83d /src/farptr.h | |
| parent | f076a3eeb9a0185b06a2abbba8c798a7761b2bdf (diff) | |
| download | seabios-hppa-4b60c000deee2002ba272b45a1121df7495c39f9.zip seabios-hppa-4b60c000deee2002ba272b45a1121df7495c39f9.tar.gz seabios-hppa-4b60c000deee2002ba272b45a1121df7495c39f9.tar.bz2 | |
Version 0.1.1rel-0.1.1
Diffstat (limited to 'src/farptr.h')
| -rw-r--r-- | src/farptr.h | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/src/farptr.h b/src/farptr.h index 1c3044b..34c3ac2 100644 --- a/src/farptr.h +++ b/src/farptr.h @@ -29,7 +29,7 @@ __asm__ __volatile__("movl %0, %%" #SEG ":%1" \ : : "r"(value), "m"(var)) -#define GET_VAR(seg, var) ({ \ +#define __GET_VAR(seg, var) ({ \ typeof(var) __val; \ if (__builtin_types_compatible_p(typeof(__val), u8)) \ __val = READ8_SEG(seg, var); \ @@ -39,7 +39,7 @@ __val = READ32_SEG(seg, var); \ __val; }) -#define SET_VAR(seg, var, val) do { \ +#define __SET_VAR(seg, var, val) do { \ if (__builtin_types_compatible_p(typeof(var), u8)) \ WRITE8_SEG(seg, var, (val)); \ else if (__builtin_types_compatible_p(typeof(var), u16)) \ @@ -48,10 +48,30 @@ WRITE32_SEG(seg, var, (val)); \ } while (0) -#define SET_SEG(SEG, value) \ +#define __SET_SEG(SEG, value) \ __asm__ __volatile__("movw %w0, %%" #SEG : : "r"(value)) -#define GET_SEG(SEG) ({ \ +#define __GET_SEG(SEG) ({ \ u16 __seg; \ __asm__ __volatile__("movw %%" #SEG ", %w0" : "=r"(__seg)); \ __seg;}) +#ifdef MODE16 +#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) +#else +// In 32-bit mode there is no need to mess with the segments. +#define GET_VAR(seg, var) (var) +#define SET_VAR(seg, var, val) (var) = (val) +#define SET_SEG(SEG, value) ((void)(value)) +#define GET_SEG(SEG) 0 +#endif + +#define GET_FARVAR(seg, var) ({ \ + SET_SEG(ES, (seg)); \ + GET_VAR(ES, (var)); }) +#define SET_FARVAR(seg, var, val) do { \ + SET_SEG(ES, (seg)); \ + SET_VAR(ES, (var), val); \ + } while (0) |