/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Common 386 CPU code.
*
*
*
* Authors: Sarah Walker,
* Miran Grca,
*
* Copyright 2008-2019 Sarah Walker.
* Copyright 2016-2019 Miran Grca.
*/
#ifndef _386_COMMON_H_
#define _386_COMMON_H_
#include
#include
#define readmemb_n(s, a, b) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) ? readmembl_no_mmut((s) + (a), b) : *(uint8_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))))
#define readmemw_n(s, a, b) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) ? readmemwl_no_mmut((s) + (a), b) : *(uint16_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uint32_t) ((s) + (a))))
#define readmeml_n(s, a, b) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) ? readmemll_no_mmut((s) + (a), b) : *(uint32_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uint32_t) ((s) + (a))))
#define readmemb(s, a) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) ? readmembl((s) + (a)) : *(uint8_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))))
#define readmemw(s, a) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) ? readmemwl((s) + (a)) : *(uint16_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uint32_t) ((s) + (a))))
#define readmeml(s, a) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) ? readmemll((s) + (a)) : *(uint32_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uint32_t) ((s) + (a))))
#define readmemq(s, a) ((readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 7)) ? readmemql((s) + (a)) : *(uint64_t *) (readlookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))))
#define writememb_n(s, a, b, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) \
writemembl_no_mmut((s) + (a), b, v); \
else \
*(uint8_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememw_n(s, a, b, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) \
writememwl_no_mmut((s) + (a), b, v); \
else \
*(uint16_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememl_n(s, a, b, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) \
writememll_no_mmut((s) + (a), b, v); \
else \
*(uint32_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememb(s, a, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) \
writemembl((s) + (a), v); \
else \
*(uint8_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememw(s, a, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) \
writememwl((s) + (a), v); \
else \
*(uint16_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememl(s, a, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) \
writememll((s) + (a), v); \
else \
*(uint32_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define writememq(s, a, v) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 7)) \
writememql((s) + (a), v); \
else \
*(uint64_t *) (writelookup2[(uint32_t) ((s) + (a)) >> 12] + (uintptr_t) ((s) + (a))) = v
#define do_mmut_rb(s, a, b) \
if (readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) \
do_mmutranslate((s) + (a), b, 1, 0)
#define do_mmut_rw(s, a, b) \
if (readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) \
do_mmutranslate((s) + (a), b, 2, 0)
#define do_mmut_rl(s, a, b) \
if (readlookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) \
do_mmutranslate((s) + (a), b, 4, 0)
#define do_mmut_rb2(s, a, b) \
old_rl2 = readlookup2[(uint32_t) ((s) + (a)) >> 12]; \
if (old_rl2 == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) \
do_mmutranslate((s) + (a), b, 1, 0)
#define do_mmut_rw2(s, a, b) \
old_rl2 = readlookup2[(uint32_t) ((s) + (a)) >> 12]; \
if (old_rl2 == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) \
do_mmutranslate((s) + (a), b, 2, 0)
#define do_mmut_rl2(s, a, b) \
old_rl2 = readlookup2[(uint32_t) ((s) + (a)) >> 12]; \
if (old_rl2 == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) \
do_mmutranslate((s) + (a), b, 4, 0)
#define do_mmut_wb(s, a, b) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF) \
do_mmutranslate((s) + (a), b, 1, 1)
#define do_mmut_ww(s, a, b) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 1)) \
do_mmutranslate((s) + (a), b, 2, 1)
#define do_mmut_wl(s, a, b) \
if (writelookup2[(uint32_t) ((s) + (a)) >> 12] == (uintptr_t) LOOKUP_INV || (s) == 0xFFFFFFFF || (((s) + (a)) & 3)) \
do_mmutranslate((s) + (a), b, 4, 1)
int checkio(uint32_t port, int mask);
#define check_io_perm(port, size) \
if (msw & 1 && ((CPL > IOPL) || (cpu_state.eflags & VM_FLAG))) { \
int tempi = checkio(port, (1 << size) - 1); \
if (cpu_state.abrt) \
return 1; \
if (tempi) { \
if (cpu_state.eflags & VM_FLAG) \
x86gpf_expected(NULL, 0); \
else \
x86gpf(NULL, 0); \
return 1; \
} \
}
#define SEG_CHECK_READ(seg) \
do { \
if ((seg)->base == 0xffffffff) { \
x86gpf("Segment can't read", 0); \
return 1; \
} \
} while (0)
#define SEG_CHECK_WRITE(seg) \
do { \
if ((seg)->base == 0xffffffff) { \
x86gpf("Segment can't write", 0); \
return 1; \
} \
} while (0)
#define CHECK_READ(chseg, low, high) \
if ((low < (chseg)->limit_low) || (high > (chseg)->limit_high) || ((msw & 1) && !(cpu_state.eflags & VM_FLAG) && (((chseg)->access & 10) == 8))) { \
x86gpf("Limit check (READ)", 0); \
return 1; \
} \
if (msw & 1 && !(cpu_state.eflags & VM_FLAG) && !((chseg)->access & 0x80)) { \
if ((chseg) == &cpu_state.seg_ss) \
x86ss(NULL, (chseg)->seg & 0xfffc); \
else \
x86np("Read from seg not present", (chseg)->seg & 0xfffc); \
return 1; \
}
#define CHECK_READ_REP(chseg, low, high) \
if ((low < (chseg)->limit_low) || (high > (chseg)->limit_high)) { \
x86gpf("Limit check (READ)", 0); \
break; \
} \
if (msw & 1 && !(cpu_state.eflags & VM_FLAG) && !((chseg)->access & 0x80)) { \
if ((chseg) == &cpu_state.seg_ss) \
x86ss(NULL, (chseg)->seg & 0xfffc); \
else \
x86np("Read from seg not present", (chseg)->seg & 0xfffc); \
break; \
}
#define CHECK_WRITE_COMMON(chseg, low, high) \
if ((low < (chseg)->limit_low) || (high > (chseg)->limit_high) || !((chseg)->access & 2) || ((msw & 1) && !(cpu_state.eflags & VM_FLAG) && ((chseg)->access & 8))) { \
x86gpf("Limit check (WRITE)", 0); \
return 1; \
} \
if (msw & 1 && !(cpu_state.eflags & VM_FLAG) && !((chseg)->access & 0x80)) { \
if ((chseg) == &cpu_state.seg_ss) \
x86ss(NULL, (chseg)->seg & 0xfffc); \
else \
x86np("Write to seg not present", (chseg)->seg & 0xfffc); \
return 1; \
}
#define CHECK_WRITE(chseg, low, high) \
CHECK_WRITE_COMMON(chseg, low, high)
#define CHECK_WRITE_REP(chseg, low, high) \
if ((low < (chseg)->limit_low) || (high > (chseg)->limit_high)) { \
x86gpf("Limit check (WRITE REP)", 0); \
break; \
} \
if (msw & 1 && !(cpu_state.eflags & VM_FLAG) && !((chseg)->access & 0x80)) { \
if ((chseg) == &cpu_state.seg_ss) \
x86ss(NULL, (chseg)->seg & 0xfffc); \
else \
x86np("Write (REP) to seg not present", (chseg)->seg & 0xfffc); \
break; \
}
#define NOTRM \
if (!(msw & 1) || (cpu_state.eflags & VM_FLAG)) { \
x86_int(6); \
return 1; \
}
static __inline uint8_t
fastreadb(uint32_t a)
{
uint8_t *t;
if ((a >> 12) == pccache)
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint8_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint8_t *) &pccache2[a]);
#endif
t = getpccache(a);
if (cpu_state.abrt)
return 0;
pccache = a >> 12;
pccache2 = t;
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint8_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint8_t *) &pccache2[a]);
#endif
}
static __inline uint16_t
fastreadw(uint32_t a)
{
uint8_t *t;
uint16_t val;
if ((a & 0xFFF) > 0xFFE) {
val = fastreadb(a);
val |= (fastreadb(a + 1) << 8);
return val;
}
if ((a >> 12) == pccache)
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint16_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint16_t *) &pccache2[a]);
#endif
t = getpccache(a);
if (cpu_state.abrt)
return 0;
pccache = a >> 12;
pccache2 = t;
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint16_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint16_t *) &pccache2[a]);
#endif
}
static __inline uint32_t
fastreadl(uint32_t a)
{
uint8_t *t;
uint32_t val;
if ((a & 0xFFF) < 0xFFD) {
if ((a >> 12) != pccache) {
t = getpccache(a);
if (cpu_state.abrt)
return 0;
pccache2 = t;
pccache = a >> 12;
}
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint32_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint32_t *) &pccache2[a]);
#endif
}
val = fastreadw(a);
val |= (fastreadw(a + 2) << 16);
return val;
}
static __inline void *
get_ram_ptr(uint32_t a)
{
if ((a >> 12) == pccache)
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return (void *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL));
#else
return &pccache2[a];
#endif
else {
uint8_t *t = getpccache(a);
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return (void *) (((uintptr_t) &t[a] & 0x00000000ffffffffULL) | ((uintptr_t) &t[0] & 0xffffffff00000000ULL));
#else
return &t[a];
#endif
}
}
extern int opcode_length[256];
static __inline uint16_t
fastreadw_fetch(uint32_t a)
{
uint8_t *t;
uint16_t val;
if ((a & 0xFFF) > 0xFFE) {
val = fastreadb(a);
if (opcode_length[val & 0xff] > 1)
val |= (fastreadb(a + 1) << 8);
return val;
}
if ((a >> 12) == pccache)
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint16_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint16_t *) &pccache2[a]);
#endif
t = getpccache(a);
if (cpu_state.abrt)
return 0;
pccache = a >> 12;
pccache2 = t;
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint16_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint16_t *) &pccache2[a]);
#endif
}
static __inline uint32_t
fastreadl_fetch(uint32_t a)
{
uint8_t *t;
uint32_t val;
if ((a & 0xFFF) < 0xFFD) {
if ((a >> 12) != pccache) {
t = getpccache(a);
if (cpu_state.abrt)
return 0;
pccache2 = t;
pccache = a >> 12;
}
#if (defined __amd64__ || defined _M_X64 || defined __aarch64__ || defined _M_ARM64)
return *((uint32_t *) (((uintptr_t) &pccache2[a] & 0x00000000ffffffffULL) | ((uintptr_t) &pccache2[0] & 0xffffffff00000000ULL)));
#else
return *((uint32_t *) &pccache2[a]);
#endif
}
val = fastreadw_fetch(a);
if (opcode_length[val & 0xff] > 2)
val |= (fastreadw(a + 2) << 16);
return val;
}
static __inline uint8_t
getbyte(void)
{
cpu_state.pc++;
return fastreadb(cs + (cpu_state.pc - 1));
}
static __inline uint16_t
getword(void)
{
cpu_state.pc += 2;
return fastreadw(cs + (cpu_state.pc - 2));
}
static __inline uint32_t
getlong(void)
{
cpu_state.pc += 4;
return fastreadl(cs + (cpu_state.pc - 4));
}
static __inline uint64_t
getquad(void)
{
cpu_state.pc += 8;
return fastreadl(cs + (cpu_state.pc - 8)) | ((uint64_t) fastreadl(cs + (cpu_state.pc - 4)) << 32);
}
static __inline uint8_t
geteab(void)
{
if (cpu_mod == 3)
return (cpu_rm & 4) ? cpu_state.regs[cpu_rm & 3].b.h : cpu_state.regs[cpu_rm & 3].b.l;
if (eal_r)
return *(uint8_t *) eal_r;
return readmemb(easeg, cpu_state.eaaddr);
}
static __inline uint16_t
geteaw(void)
{
if (cpu_mod == 3)
return cpu_state.regs[cpu_rm].w;
if (eal_r)
return *(uint16_t *) eal_r;
return readmemw(easeg, cpu_state.eaaddr);
}
static __inline uint32_t
geteal(void)
{
if (cpu_mod == 3)
return cpu_state.regs[cpu_rm].l;
if (eal_r)
return *eal_r;
return readmeml(easeg, cpu_state.eaaddr);
}
static __inline uint64_t
geteaq(void)
{
return readmemq(easeg, cpu_state.eaaddr);
}
static __inline uint8_t
geteab_mem(void)
{
if (eal_r)
return *(uint8_t *) eal_r;
return readmemb(easeg, cpu_state.eaaddr);
}
static __inline uint16_t
geteaw_mem(void)
{
if (eal_r)
return *(uint16_t *) eal_r;
return readmemw(easeg, cpu_state.eaaddr);
}
static __inline uint32_t
geteal_mem(void)
{
if (eal_r)
return *eal_r;
return readmeml(easeg, cpu_state.eaaddr);
}
static __inline int
seteaq_cwc(void)
{
CHECK_WRITE_COMMON(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr);
return 0;
}
static __inline void
seteaq(uint64_t v)
{
if (seteaq_cwc())
return;
writememql(easeg + cpu_state.eaaddr, v);
}
#define seteab(v) \
if (cpu_mod != 3) { \
CHECK_WRITE_COMMON(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr); \
if (eal_w) \
*(uint8_t *) eal_w = v; \
else \
writemembl(easeg + cpu_state.eaaddr, v); \
} else if (cpu_rm & 4) \
cpu_state.regs[cpu_rm & 3].b.h = v; \
else \
cpu_state.regs[cpu_rm].b.l = v
#define seteaw(v) \
if (cpu_mod != 3) { \
CHECK_WRITE_COMMON(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr + 1); \
if (eal_w) \
*(uint16_t *) eal_w = v; \
else \
writememwl(easeg + cpu_state.eaaddr, v); \
} else \
cpu_state.regs[cpu_rm].w = v
#define seteal(v) \
if (cpu_mod != 3) { \
CHECK_WRITE_COMMON(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr + 3); \
if (eal_w) \
*eal_w = v; \
else \
writememll(easeg + cpu_state.eaaddr, v); \
} else \
cpu_state.regs[cpu_rm].l = v
#define seteab_mem(v) \
if (eal_w) \
*(uint8_t *) eal_w = v; \
else \
writemembl(easeg + cpu_state.eaaddr, v);
#define seteaw_mem(v) \
if (eal_w) \
*(uint16_t *) eal_w = v; \
else \
writememwl(easeg + cpu_state.eaaddr, v);
#define seteal_mem(v) \
if (eal_w) \
*eal_w = v; \
else \
writememll(easeg + cpu_state.eaaddr, v);
#define getbytef() \
((uint8_t) (fetchdat)); \
cpu_state.pc++
#define getwordf() \
((uint16_t) (fetchdat)); \
cpu_state.pc += 2
#define getbyte2f() \
((uint8_t) (fetchdat >> 8)); \
cpu_state.pc++
#define getword2f() \
((uint16_t) (fetchdat >> 8)); \
cpu_state.pc += 2
#endif