113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Second CPU header.
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*
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*
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*
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* Authors: Sarah Walker, <https://pcem-emulator.co.uk/>
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* leilei,
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2008-2020 Sarah Walker.
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* Copyright 2016-2018 leilei.
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* Copyright 2016-2020 Miran Grca.
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*/
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#ifndef EMU_X86_H
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#define EMU_X86_H
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#define ABRT_MASK 0x3f
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/*An 'expected' exception is one that would be expected to occur on every execution
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of this code path; eg a GPF due to being in v86 mode. An 'unexpected' exception is
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one that would be unlikely to occur on the next exception, eg a page fault may be
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fixed up by the exception handler and the next execution would not hit it.
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This distinction is used by the dynarec; a block that hits an 'expected' exception
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would be compiled, a block that hits an 'unexpected' exception would be rejected so
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that we don't end up with an unnecessarily short block*/
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#define ABRT_EXPECTED 0x80
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extern uint8_t opcode;
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extern uint8_t flags_p;
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extern uint8_t znptable8[256];
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extern uint16_t zero;
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extern uint16_t oldcs;
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extern uint16_t lastcs;
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extern uint16_t lastpc;
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extern uint16_t *mod1add[2][8];
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extern uint16_t znptable16[65536];
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extern int x86_was_reset;
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extern int trap;
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extern int codegen_flat_ss;
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extern int codegen_flat_ds;
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extern int timetolive;
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extern int keyboardtimer;
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extern int trap;
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extern int optype;
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extern int stack32;
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extern int oldcpl;
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extern int cpl_override;
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extern int nmi_enable;
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extern int oddeven;
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extern int inttype;
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extern int cpu_init;
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extern uint32_t use32;
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extern uint32_t rmdat;
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extern uint32_t easeg;
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extern uint32_t oxpc;
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extern uint32_t flags_zn;
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extern uint32_t abrt_error;
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extern uint32_t backupregs[16];
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extern uint32_t *mod1seg[8];
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extern uint32_t *eal_r;
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extern uint32_t *eal_w;
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extern int fpu_cycles;
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#define fetchdat rmdat
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#define setznp168 setznp16
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#define getr8(r) ((r & 4) ? cpu_state.regs[r & 3].b.h : cpu_state.regs[r & 3].b.l)
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#define getr16(r) cpu_state.regs[r].w
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#define getr32(r) cpu_state.regs[r].l
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#define setr8(r, v) \
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if (r & 4) \
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cpu_state.regs[r & 3].b.h = v; \
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else \
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cpu_state.regs[r & 3].b.l = v;
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#define setr16(r, v) cpu_state.regs[r].w = v
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#define setr32(r, v) cpu_state.regs[r].l = v
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#define fetchea() \
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{ \
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rmdat = readmemb(cs + pc); \
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pc++; \
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reg = (rmdat >> 3) & 7; \
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mod = (rmdat >> 6) & 3; \
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rm = rmdat & 7; \
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if (mod != 3) \
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fetcheal(); \
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}
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extern void x86illegal(void);
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extern uint8_t rep_op;
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extern uint8_t is_smint;
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extern uint16_t io_port;
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extern uint32_t io_val;
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#endif /*EMU_X86_H*/
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