179 lines
3.8 KiB
C
179 lines
3.8 KiB
C
// The OS/K Team licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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#ifndef _ARCH_H
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#define _ARCH_H
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#define dev_t stddev_t
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <stdarg.h>
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#undef dev_t
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#define packed __attribute__ ((__packed__))
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#define static_assert _Static_assert
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#define alignof _Alignof
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typedef unsigned int bool;
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typedef unsigned char uchar;
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typedef unsigned short ushort;
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typedef unsigned int uint;
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typedef unsigned long ulong;
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typedef struct reg_t reg_t;
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typedef struct ctx_t ctx_t;
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typedef struct instr_t instr_t;
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typedef struct acc_t acc_t;
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typedef struct arch_t arch_t;
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typedef struct dev_t dev_t;
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void log(const char *, ...);
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void vlog(const char *, va_list);
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// A_REG is implicit
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// A_MEM denotes a memory access
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// A_OFF is A_MEM but a 16-bit offset is expected immediatly next
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enum
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{
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A_REG = 0,
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A_MEM8 = 0x7001,
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A_MEM16 = 0x7002,
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A_MEM32 = 0x7004,
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A_MEM64 = 0x7008,
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A_OFF8 = 0x7701,
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A_OFF16 = 0x7702,
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A_OFF32 = 0x7704,
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A_OFF64 = 0x7708,
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A_IMM16 = 0x7772,
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A_IMM32 = 0x7774,
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A_IMM64 = 0x7778
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};
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#define A_IS_MEM(x) ((x) >= A_MEM8 && (x) <= A_MEM64)
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#define A_IS_OFF(x) ((x) >= A_OFF8 && (x) <= A_OFF64)
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#define A_IS_IMM(x) ((x) >= A_IMM16)
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#define A_IS_8(x) ((x) & 0xF == 1)
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#define A_IS_16(x) ((x) & 0xF == 2)
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#define A_IS_32(x) ((x) & 0xF == 3)
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#define A_IS_64(x) ((x) & 0xF == 4)
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struct acc_t
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{
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bool mem;
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uint mlen;
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short off;
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uint offreg;
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uint type;
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uint ilen;
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ulong val;
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};
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enum { NOPREF, PREF_REP=0x8000, PREF_LOCK, NPREFS };
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#define ISPREF(x) ((x) & 0x8000 && (x)<NPREFS)
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#define ISINSTR(x) ((x) < NINSTRS)
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enum { NOPRM, P_REG, P_IMM, P_MEM=4 };
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struct instr_t
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{
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char *name;
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char *full;
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uint prm1;
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uint prm2;
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void (*func)(ctx_t *, acc_t *, acc_t *);
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};
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struct ctx_t
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{
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reg_t *r;
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instr_t *i;
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// Memory and memory size
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ushort *mp;
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ulong mz;
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// Read next instruction
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ushort (*get)(ctx_t *ctx);
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// For disassembly
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FILE *disf;
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// Step by step
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int step;
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// Devices list head
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dev_t *dh;
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};
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#define R(X) ctx->r[X].val
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static inline ushort bswap16(ushort u)
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{ return ((u<<8) | (u>>8)); }
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static inline char getmempref(ushort len)
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{ return (len==1?'b':(len==2?'w':(len==4?'l':(len==8?'q':'x')))); }
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enum
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{
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E_SHT, // Shutdown instruction
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E_IMP, // Not implemented
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E_ILL, // Ill-formed
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E_ACC, // Invalid access
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E_SYS, // Supervisor only
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E_ALI, // Alignment error
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E_STK, // Stack error
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NEXCPTS
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};
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void dumpregs(ctx_t *);
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void dumpinstr(ctx_t *, ulong, uint, ushort, acc_t *, acc_t *);
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void dumpmem(ctx_t *, ulong, ulong);
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void dumpfwstack(ctx_t *);
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void _except(ctx_t *, int, char *, ...);
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void disasm(ctx_t *ctx);
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void decode(ctx_t *ctx);
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#define MEMOFF (1 * 1024 * 1024)
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#define MEMSIZE (16 * 1024 * 1024) // 16MB
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#define addr2real(p) (((p) - MEMOFF) / 2)
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#define real2addr(p) (((p) + MEMOFF) / 2)
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// Address of boot firmware stack
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#define FWSTACK (MEMOFF * 2) // 2MB
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ulong readmem8(ctx_t *, ulong addr);
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ulong readmem16(ctx_t *, ulong addr);
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ulong readmem32(ctx_t *, ulong addr);
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ulong readmem64(ctx_t *, ulong addr);
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ulong readmem(ctx_t *c, ulong addr, uint len);
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void writemem8(ctx_t *, ulong val, ulong addr);
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void writemem16(ctx_t *, ulong val, ulong addr);
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void writemem32(ctx_t *, ulong val, ulong addr);
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void writemem64(ctx_t *, ulong val, ulong addr);
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void writemem(ctx_t *, ulong val, ulong addr, uint len);
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#include <pc/regs.h>
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#include <in/arch_i.h>
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extern reg_t arch_r[NREGS];
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extern instr_t arch_i[NINSTRS];
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#endif
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