diff options
author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/seabios/src/bregs.h | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/seabios/src/bregs.h')
-rw-r--r-- | qemu/roms/seabios/src/bregs.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/bregs.h b/qemu/roms/seabios/src/bregs.h new file mode 100644 index 000000000..d40526345 --- /dev/null +++ b/qemu/roms/seabios/src/bregs.h @@ -0,0 +1,80 @@ +// Structure layout of cpu registers that the bios uses. +// +// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net> +// +// This file may be distributed under the terms of the GNU LGPLv3 license. + +#ifndef __BREGS_H +#define __BREGS_H + +#include "types.h" // u16 +#include "x86.h" // F_CF + + +/**************************************************************** + * Registers saved/restored in romlayout.S + ****************************************************************/ + +#define UREG(ER, R, RH, RL) union { u32 ER; struct { u16 R; u16 R ## _hi; }; struct { u8 RL; u8 RH; u8 R ## _hilo; u8 R ## _hihi; }; } + +// Layout of registers passed in to irq handlers. Note that this +// layout corresponds to code in romlayout.S - don't change it here +// without also updating the assembler code. +struct bregs { + u16 ds; + u16 es; + UREG(edi, di, di8u, di8l); + UREG(esi, si, si8u, si8l); + UREG(ebp, bp, bp8u, bp8l); + UREG(ebx, bx, bh, bl); + UREG(edx, dx, dh, dl); + UREG(ecx, cx, ch, cl); + UREG(eax, ax, ah, al); + struct segoff_s code; + u16 flags; +} PACKED; + + +/**************************************************************** + * Helper functions + ****************************************************************/ + +static inline void +set_cf(struct bregs *regs, int cond) +{ + if (cond) + regs->flags |= F_CF; + else + regs->flags &= ~F_CF; +} + +// Frequently used return codes +#define RET_EUNSUPPORTED 0x86 + +static inline void +set_success(struct bregs *regs) +{ + set_cf(regs, 0); +} + +static inline void +set_code_success(struct bregs *regs) +{ + regs->ah = 0; + set_cf(regs, 0); +} + +static inline void +set_invalid_silent(struct bregs *regs) +{ + set_cf(regs, 1); +} + +static inline void +set_code_invalid_silent(struct bregs *regs, u8 code) +{ + regs->ah = code; + set_cf(regs, 1); +} + +#endif // bregs.h |