/*

 *  qemu user main

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *  Copyright (c) 2006 Pierre d'Herbemont

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <errno.h>

#include <unistd.h>

#include <sys/syscall.h>

#include <sys/mman.h>

#include "qemu.h"

#define DEBUG_LOGFILE "/tmp/qemu.log"

#ifdef __APPLE__

#include <crt_externs.h>

# define environ  (*_NSGetEnviron())

#endif

#include <mach/mach_init.h>

#include <mach/vm_map.h>

const char *interp_prefix = "";

asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");

/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so

   we allocate a bigger stack. Need a better solution, for example

   by remapping the process stack directly at the right place */

unsigned long stack_size = 512 * 1024;

void qerror(const char *fmt, ...)

{

    va_list ap;

    va_start(ap, fmt);

    vfprintf(stderr, fmt, ap);

    va_end(ap);

    fprintf(stderr, "\n");

    exit(1);

}

void gemu_log(const char *fmt, ...)

{

    va_list ap;

    va_start(ap, fmt);

    vfprintf(stderr, fmt, ap);

    va_end(ap);

}

void cpu_outb(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);

}

void cpu_outw(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);

}

void cpu_outl(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);

}

int cpu_inb(CPUState *env, int addr)

{

    fprintf(stderr, "inb: port=0x%04x\n", addr);

    return 0;

}

int cpu_inw(CPUState *env, int addr)

{

    fprintf(stderr, "inw: port=0x%04x\n", addr);

    return 0;

}

int cpu_inl(CPUState *env, int addr)

{

    fprintf(stderr, "inl: port=0x%04x\n", addr);

    return 0;

}

int cpu_get_pic_interrupt(CPUState *env)

{

    return -1;

}

#ifdef TARGET_PPC

static inline uint64_t cpu_ppc_get_tb (CPUState *env)

{

    /* TO FIX */

    return 0;

}

uint32_t cpu_ppc_load_tbl (CPUState *env)

{

    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;

}

uint32_t cpu_ppc_load_tbu (CPUState *env)

{

    return cpu_ppc_get_tb(env) >> 32;

}

uint32_t cpu_ppc_load_atbl (CPUState *env)

{

    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;

}

uint32_t cpu_ppc_load_atbu (CPUState *env)

{

    return cpu_ppc_get_tb(env) >> 32;

}

uint32_t cpu_ppc601_load_rtcu (CPUState *env)

{

    cpu_ppc_load_tbu(env);

}

uint32_t cpu_ppc601_load_rtcl (CPUState *env)

{

    return cpu_ppc_load_tbl(env) & 0x3FFFFF80;

}

/* XXX: to be fixed */

int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)

{

    return -1;

}

int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)

{

    return -1;

}

#define EXCP_DUMP(env, fmt, args...)                                         \

do {                                                                          \

    fprintf(stderr, fmt , ##args);                                            \

    cpu_dump_state(env, stderr, fprintf, 0);                                  \

    if (loglevel != 0) {                                                      \

        fprintf(logfile, fmt , ##args);                                       \

        cpu_dump_state(env, logfile, fprintf, 0);                             \

    }                                                                         \

} while (0)

void cpu_loop(CPUPPCState *env)

{

    int trapnr;

    uint32_t ret;

    target_siginfo_t info;

    for(;;) {

        trapnr = cpu_ppc_exec(env);

        switch(trapnr) {

        case POWERPC_EXCP_NONE:

            /* Just go on */

            break;

        case POWERPC_EXCP_CRITICAL: /* Critical input                        */

            cpu_abort(env, "Critical interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_MCHECK:   /* Machine check exception               */

            cpu_abort(env, "Machine check exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DSI:      /* Data storage exception                */

#ifndef DAR

/* To deal with multiple qemu header version as host for the darwin-user code */

# define DAR SPR_DAR

#endif

            EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",

                      env->spr[SPR_DAR]);

            /* Handle this via the gdb */

            gdb_handlesig (env, SIGSEGV);

            info.si_addr = (void*)env->nip;

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_ISI:      /* Instruction storage exception         */

            EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n",

                      env->spr[SPR_DAR]);

            /* Handle this via the gdb */

            gdb_handlesig (env, SIGSEGV);

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_EXTERNAL: /* External input                        */

            cpu_abort(env, "External interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ALIGN:    /* Alignment exception                   */

            EXCP_DUMP(env, "Unaligned memory access\n");

            info.si_errno = 0;

            info.si_code = BUS_ADRALN;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_PROGRAM:  /* Program exception                     */

            /* XXX: check this */

            switch (env->error_code & ~0xF) {

            case POWERPC_EXCP_FP:

                EXCP_DUMP(env, "Floating point program exception\n");

                /* Set FX */

                info.si_signo = SIGFPE;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_FP_OX:

                    info.si_code = FPE_FLTOVF;

                    break;

                case POWERPC_EXCP_FP_UX:

                    info.si_code = FPE_FLTUND;

                    break;

                case POWERPC_EXCP_FP_ZX:

                case POWERPC_EXCP_FP_VXZDZ:

                    info.si_code = FPE_FLTDIV;

                    break;

                case POWERPC_EXCP_FP_XX:

                    info.si_code = FPE_FLTRES;

                    break;

                case POWERPC_EXCP_FP_VXSOFT:

                    info.si_code = FPE_FLTINV;

                    break;

                case POWERPC_EXCP_FP_VXSNAN:

                case POWERPC_EXCP_FP_VXISI:

                case POWERPC_EXCP_FP_VXIDI:

                case POWERPC_EXCP_FP_VXIMZ:

                case POWERPC_EXCP_FP_VXVC:

                case POWERPC_EXCP_FP_VXSQRT:

                case POWERPC_EXCP_FP_VXCVI:

                    info.si_code = FPE_FLTSUB;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",

                              env->error_code);

                    break;

                }

                break;

            case POWERPC_EXCP_INVAL:

                EXCP_DUMP(env, "Invalid instruction\n");

                info.si_signo = SIGILL;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_INVAL_INVAL:

                    info.si_code = ILL_ILLOPC;

                    break;

                case POWERPC_EXCP_INVAL_LSWX:

                    info.si_code = ILL_ILLOPN;

                    break;

                case POWERPC_EXCP_INVAL_SPR:

                    info.si_code = ILL_PRVREG;

                    break;

                case POWERPC_EXCP_INVAL_FP:

                    info.si_code = ILL_COPROC;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",

                              env->error_code & 0xF);

                    info.si_code = ILL_ILLADR;

                    break;

                }

                /* Handle this via the gdb */

                gdb_handlesig (env, SIGSEGV);

                break;

            case POWERPC_EXCP_PRIV:

                EXCP_DUMP(env, "Privilege violation\n");

                info.si_signo = SIGILL;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_PRIV_OPC:

                    info.si_code = ILL_PRVOPC;

                    break;

                case POWERPC_EXCP_PRIV_REG:

                    info.si_code = ILL_PRVREG;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",

                              env->error_code & 0xF);

                    info.si_code = ILL_PRVOPC;

                    break;

                }

                break;

            case POWERPC_EXCP_TRAP:

                cpu_abort(env, "Tried to call a TRAP\n");

                break;

            default:

                /* Should not happen ! */

                cpu_abort(env, "Unknown program exception (%02x)\n",

                          env->error_code);

                break;

            }

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_FPU:      /* Floating-point unavailable exception  */

            EXCP_DUMP(env, "No floating point allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_SYSCALL:  /* System call exception                 */

            cpu_abort(env, "Syscall exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_APU:      /* Auxiliary processor unavailable       */

            EXCP_DUMP(env, "No APU instruction allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_DECR:     /* Decrementer exception                 */

            cpu_abort(env, "Decrementer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_FIT:      /* Fixed-interval timer interrupt        */

            cpu_abort(env, "Fix interval timer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_WDT:      /* Watchdog timer interrupt              */

            cpu_abort(env, "Watchdog timer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DTLB:     /* Data TLB error                        */

            cpu_abort(env, "Data TLB exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ITLB:     /* Instruction TLB error                 */

            cpu_abort(env, "Instruction TLB exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DEBUG:    /* Debug interrupt                       */

            gdb_handlesig (env, SIGTRAP);

            break;

        case POWERPC_EXCP_SPEU:     /* SPE/embedded floating-point unavail.  */

            EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_EFPDI:    /* Embedded floating-point data IRQ      */

            cpu_abort(env, "Embedded floating-point data IRQ not handled\n");

            break;

        case POWERPC_EXCP_EFPRI:    /* Embedded floating-point round IRQ     */

            cpu_abort(env, "Embedded floating-point round IRQ not handled\n");

            break;

        case POWERPC_EXCP_EPERFM:   /* Embedded performance monitor IRQ      */

            cpu_abort(env, "Performance monitor exception not handled\n");

            break;

        case POWERPC_EXCP_DOORI:    /* Embedded doorbell interrupt           */

            cpu_abort(env, "Doorbell interrupt while in user mode. "

                       "Aborting\n");

            break;

        case POWERPC_EXCP_DOORCI:   /* Embedded doorbell critical interrupt  */

            cpu_abort(env, "Doorbell critical interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_RESET:    /* System reset exception                */

            cpu_abort(env, "Reset interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DSEG:     /* Data segment exception                */

            cpu_abort(env, "Data segment exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ISEG:     /* Instruction segment exception         */

            cpu_abort(env, "Instruction segment exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HDECR:    /* Hypervisor decrementer exception      */

            cpu_abort(env, "Hypervisor decrementer interrupt "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_TRACE:    /* Trace exception                       */

            /* Nothing to do:

             * we use this exception to emulate step-by-step execution mode.

             */

            break;

        case POWERPC_EXCP_HDSI:     /* Hypervisor data storage exception     */

            cpu_abort(env, "Hypervisor data storage exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HISI:     /* Hypervisor instruction storage excp   */

            cpu_abort(env, "Hypervisor instruction storage exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HDSEG:    /* Hypervisor data segment exception     */

            cpu_abort(env, "Hypervisor data segment exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HISEG:    /* Hypervisor instruction segment excp   */

            cpu_abort(env, "Hypervisor instruction segment exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_VPU:      /* Vector unavailable exception          */

            EXCP_DUMP(env, "No Altivec instructions allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_PIT:      /* Programmable interval timer IRQ       */

            cpu_abort(env, "Programable interval timer interrupt "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_IO:       /* IO error exception                    */

            cpu_abort(env, "IO error exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_RUNM:     /* Run mode exception                    */

            cpu_abort(env, "Run mode exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_EMUL:     /* Emulation trap exception              */

            cpu_abort(env, "Emulation trap exception not handled\n");

            break;

        case POWERPC_EXCP_IFTLB:    /* Instruction fetch TLB error           */

            cpu_abort(env, "Instruction fetch TLB exception "

                      "while in user-mode. Aborting");

            break;

        case POWERPC_EXCP_DLTLB:    /* Data load TLB miss                    */

            cpu_abort(env, "Data load TLB exception while in user-mode. "

                      "Aborting");

            break;

        case POWERPC_EXCP_DSTLB:    /* Data store TLB miss                   */

            cpu_abort(env, "Data store TLB exception while in user-mode. "

                      "Aborting");

            break;

        case POWERPC_EXCP_FPA:      /* Floating-point assist exception       */

            cpu_abort(env, "Floating-point assist exception not handled\n");

            break;

        case POWERPC_EXCP_IABR:     /* Instruction address breakpoint        */

            cpu_abort(env, "Instruction address breakpoint exception "

                      "not handled\n");

            break;

        case POWERPC_EXCP_SMI:      /* System management interrupt           */

            cpu_abort(env, "System management interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_THERM:    /* Thermal interrupt                     */

            cpu_abort(env, "Thermal interrupt interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_PERFM:    /* Embedded performance monitor IRQ      */

            cpu_abort(env, "Performance monitor exception not handled\n");

            break;

        case POWERPC_EXCP_VPUA:     /* Vector assist exception               */

            cpu_abort(env, "Vector assist exception not handled\n");

            break;

        case POWERPC_EXCP_SOFTP:    /* Soft patch exception                  */

            cpu_abort(env, "Soft patch exception not handled\n");

            break;

        case POWERPC_EXCP_MAINT:    /* Maintenance exception                 */

            cpu_abort(env, "Maintenance exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_STOP:     /* stop translation                      */

            /* We did invalidate the instruction cache. Go on */

            break;

        case POWERPC_EXCP_BRANCH:   /* branch instruction:                   */

            /* We just stopped because of a branch. Go on */

            break;

        case POWERPC_EXCP_SYSCALL_USER:

            /* system call in user-mode emulation */

            /* system call */

            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)

                ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],

                                      env->gpr[5], env->gpr[6], env->gpr[7],

                                      env->gpr[8], env->gpr[9], env->gpr[10]*/);

            else if(((int)env->gpr[0])<0)

                ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],

                                      env->gpr[5], env->gpr[6], env->gpr[7],

                                      env->gpr[8], env->gpr[9], env->gpr[10]);

            else

                ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],

                                        env->gpr[5], env->gpr[6], env->gpr[7],

                                        env->gpr[8], env->gpr[9], env->gpr[10]);

            /* Unix syscall error signaling */

            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)

            {

                if( (int)ret < 0 )

                    env->nip += 0;

                else

                    env->nip += 4;

            }

            /* Return value */

            env->gpr[3] = ret;

            break;

        case EXCP_INTERRUPT:

            /* just indicate that signals should be handled asap */

            break;

        default:

            cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);

            break;

        }

        process_pending_signals(env);

    }

}