target-sparc/int64_helper.c

   1 /*
   2  * Sparc64 interrupt helpers
   3  *
   4  *  Copyright (c) 2003-2005 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cpu.h"
  21 #include "helper.h"
  22 #include "trace.h"
  23
  24 #define DEBUG_PCALL
  25
  26 #ifdef DEBUG_PCALL
  27 static const char * const excp_names[0x80] = {
  28     [TT_TFAULT] = "Instruction Access Fault",
  29     [TT_TMISS] = "Instruction Access MMU Miss",
  30     [TT_CODE_ACCESS] = "Instruction Access Error",
  31     [TT_ILL_INSN] = "Illegal Instruction",
  32     [TT_PRIV_INSN] = "Privileged Instruction",
  33     [TT_NFPU_INSN] = "FPU Disabled",
  34     [TT_FP_EXCP] = "FPU Exception",
  35     [TT_TOVF] = "Tag Overflow",
  36     [TT_CLRWIN] = "Clean Windows",
  37     [TT_DIV_ZERO] = "Division By Zero",
  38     [TT_DFAULT] = "Data Access Fault",
  39     [TT_DMISS] = "Data Access MMU Miss",
  40     [TT_DATA_ACCESS] = "Data Access Error",
  41     [TT_DPROT] = "Data Protection Error",
  42     [TT_UNALIGNED] = "Unaligned Memory Access",
  43     [TT_PRIV_ACT] = "Privileged Action",
  44     [TT_EXTINT | 0x1] = "External Interrupt 1",
  45     [TT_EXTINT | 0x2] = "External Interrupt 2",
  46     [TT_EXTINT | 0x3] = "External Interrupt 3",
  47     [TT_EXTINT | 0x4] = "External Interrupt 4",
  48     [TT_EXTINT | 0x5] = "External Interrupt 5",
  49     [TT_EXTINT | 0x6] = "External Interrupt 6",
  50     [TT_EXTINT | 0x7] = "External Interrupt 7",
  51     [TT_EXTINT | 0x8] = "External Interrupt 8",
  52     [TT_EXTINT | 0x9] = "External Interrupt 9",
  53     [TT_EXTINT | 0xa] = "External Interrupt 10",
  54     [TT_EXTINT | 0xb] = "External Interrupt 11",
  55     [TT_EXTINT | 0xc] = "External Interrupt 12",
  56     [TT_EXTINT | 0xd] = "External Interrupt 13",
  57     [TT_EXTINT | 0xe] = "External Interrupt 14",
  58     [TT_EXTINT | 0xf] = "External Interrupt 15",
  59 };
  60 #endif
  61
  62 void sparc_cpu_do_interrupt(CPUState *cs)
  63 {
  64     SPARCCPU *cpu = SPARC_CPU(cs);
  65     CPUSPARCState *env = &cpu->env;
  66     int intno = env->exception_index;
  67     trap_state *tsptr;
  68
  69     /* Compute PSR before exposing state.  */
  70     if (env->cc_op != CC_OP_FLAGS) {
  71         cpu_get_psr(env);
  72     }
  73
  74 #ifdef DEBUG_PCALL
  75     if (qemu_loglevel_mask(CPU_LOG_INT)) {
  76         static int count;
  77         const char *name;
  78
  79         if (intno < 0 || intno >= 0x180) {
  80             name = "Unknown";
  81         } else if (intno >= 0x100) {
  82             name = "Trap Instruction";
  83         } else if (intno >= 0xc0) {
  84             name = "Window Fill";
  85         } else if (intno >= 0x80) {
  86             name = "Window Spill";
  87         } else {
  88             name = excp_names[intno];
  89             if (!name) {
  90                 name = "Unknown";
  91             }
  92         }
  93
  94         qemu_log("%6d: %s (v=%04x)\n", count, name, intno);
  95         log_cpu_state(cs, 0);
  96 #if 0
  97         {
  98             int i;
  99             uint8_t *ptr;
 100
 101             qemu_log("       code=");
 102             ptr = (uint8_t *)env->pc;
 103             for (i = 0; i < 16; i++) {
 104                 qemu_log(" %02x", ldub(ptr + i));
 105             }
 106             qemu_log("\n");
 107         }
 108 #endif
 109         count++;
 110     }
 111 #endif
 112 #if !defined(CONFIG_USER_ONLY)
 113     if (env->tl >= env->maxtl) {
 114         cpu_abort(env, "Trap 0x%04x while trap level (%d) >= MAXTL (%d),"
 115                   " Error state", env->exception_index, env->tl, env->maxtl);
 116         return;
 117     }
 118 #endif
 119     if (env->tl < env->maxtl - 1) {
 120         env->tl++;
 121     } else {
 122         env->pstate |= PS_RED;
 123         if (env->tl < env->maxtl) {
 124             env->tl++;
 125         }
 126     }
 127     tsptr = cpu_tsptr(env);
 128
 129     tsptr->tstate = (cpu_get_ccr(env) << 32) |
 130         ((env->asi & 0xff) << 24) | ((env->pstate & 0xf3f) << 8) |
 131         cpu_get_cwp64(env);
 132     tsptr->tpc = env->pc;
 133     tsptr->tnpc = env->npc;
 134     tsptr->tt = intno;
 135
 136     switch (intno) {
 137     case TT_IVEC:
 138         cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_IG);
 139         break;
 140     case TT_TFAULT:
 141     case TT_DFAULT:
 142     case TT_TMISS ... TT_TMISS + 3:
 143     case TT_DMISS ... TT_DMISS + 3:
 144     case TT_DPROT ... TT_DPROT + 3:
 145         cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_MG);
 146         break;
 147     default:
 148         cpu_change_pstate(env, PS_PEF | PS_PRIV | PS_AG);
 149         break;
 150     }
 151
 152     if (intno == TT_CLRWIN) {
 153         cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - 1));
 154     } else if ((intno & 0x1c0) == TT_SPILL) {
 155         cpu_set_cwp(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
 156     } else if ((intno & 0x1c0) == TT_FILL) {
 157         cpu_set_cwp(env, cpu_cwp_inc(env, env->cwp + 1));
 158     }
 159     env->tbr &= ~0x7fffULL;
 160     env->tbr |= ((env->tl > 1) ? 1 << 14 : 0) | (intno << 5);
 161     env->pc = env->tbr;
 162     env->npc = env->pc + 4;
 163     env->exception_index = -1;
 164 }
 165
 166 trap_state *cpu_tsptr(CPUSPARCState* env)
 167 {
 168     return &env->ts[env->tl & MAXTL_MASK];
 169 }
 170
 171 static bool do_modify_softint(CPUSPARCState *env, uint32_t value)
 172 {
 173     if (env->softint != value) {
 174         env->softint = value;
 175 #if !defined(CONFIG_USER_ONLY)
 176         if (cpu_interrupts_enabled(env)) {
 177             cpu_check_irqs(env);
 178         }
 179 #endif
 180         return true;
 181     }
 182     return false;
 183 }
 184
 185 void helper_set_softint(CPUSPARCState *env, uint64_t value)
 186 {
 187     if (do_modify_softint(env, env->softint | (uint32_t)value)) {
 188         trace_int_helper_set_softint(env->softint);
 189     }
 190 }
 191
 192 void helper_clear_softint(CPUSPARCState *env, uint64_t value)
 193 {
 194     if (do_modify_softint(env, env->softint & (uint32_t)~value)) {
 195         trace_int_helper_clear_softint(env->softint);
 196     }
 197 }
 198
 199 void helper_write_softint(CPUSPARCState *env, uint64_t value)
 200 {
 201     if (do_modify_softint(env, (uint32_t)value)) {
 202         trace_int_helper_write_softint(env->softint);
 203     }
 204 }