target-sparc/int32_helper.c

   1 /*
   2  * Sparc32 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 "qemu/osdep.h"
  21 #include "cpu.h"
  22 #include "trace.h"
  23 #include "sysemu/sysemu.h"
  24
  25 #define DEBUG_PCALL
  26
  27 #ifdef DEBUG_PCALL
  28 static const char * const excp_names[0x80] = {
  29     [TT_TFAULT] = "Instruction Access Fault",
  30     [TT_ILL_INSN] = "Illegal Instruction",
  31     [TT_PRIV_INSN] = "Privileged Instruction",
  32     [TT_NFPU_INSN] = "FPU Disabled",
  33     [TT_WIN_OVF] = "Window Overflow",
  34     [TT_WIN_UNF] = "Window Underflow",
  35     [TT_UNALIGNED] = "Unaligned Memory Access",
  36     [TT_FP_EXCP] = "FPU Exception",
  37     [TT_DFAULT] = "Data Access Fault",
  38     [TT_TOVF] = "Tag Overflow",
  39     [TT_EXTINT | 0x1] = "External Interrupt 1",
  40     [TT_EXTINT | 0x2] = "External Interrupt 2",
  41     [TT_EXTINT | 0x3] = "External Interrupt 3",
  42     [TT_EXTINT | 0x4] = "External Interrupt 4",
  43     [TT_EXTINT | 0x5] = "External Interrupt 5",
  44     [TT_EXTINT | 0x6] = "External Interrupt 6",
  45     [TT_EXTINT | 0x7] = "External Interrupt 7",
  46     [TT_EXTINT | 0x8] = "External Interrupt 8",
  47     [TT_EXTINT | 0x9] = "External Interrupt 9",
  48     [TT_EXTINT | 0xa] = "External Interrupt 10",
  49     [TT_EXTINT | 0xb] = "External Interrupt 11",
  50     [TT_EXTINT | 0xc] = "External Interrupt 12",
  51     [TT_EXTINT | 0xd] = "External Interrupt 13",
  52     [TT_EXTINT | 0xe] = "External Interrupt 14",
  53     [TT_EXTINT | 0xf] = "External Interrupt 15",
  54     [TT_TOVF] = "Tag Overflow",
  55     [TT_CODE_ACCESS] = "Instruction Access Error",
  56     [TT_DATA_ACCESS] = "Data Access Error",
  57     [TT_DIV_ZERO] = "Division By Zero",
  58     [TT_NCP_INSN] = "Coprocessor Disabled",
  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 cwp, intno = cs->exception_index;
  67
  68     /* Compute PSR before exposing state.  */
  69     if (env->cc_op != CC_OP_FLAGS) {
  70         cpu_get_psr(env);
  71     }
  72
  73 #ifdef DEBUG_PCALL
  74     if (qemu_loglevel_mask(CPU_LOG_INT)) {
  75         static int count;
  76         const char *name;
  77
  78         if (intno < 0 || intno >= 0x100) {
  79             name = "Unknown";
  80         } else if (intno >= 0x80) {
  81             name = "Trap Instruction";
  82         } else {
  83             name = excp_names[intno];
  84             if (!name) {
  85                 name = "Unknown";
  86             }
  87         }
  88
  89         qemu_log("%6d: %s (v=%02x)\n", count, name, intno);
  90         log_cpu_state(cs, 0);
  91 #if 0
  92         {
  93             int i;
  94             uint8_t *ptr;
  95
  96             qemu_log("       code=");
  97             ptr = (uint8_t *)env->pc;
  98             for (i = 0; i < 16; i++) {
  99                 qemu_log(" %02x", ldub(ptr + i));
 100             }
 101             qemu_log("\n");
 102         }
 103 #endif
 104         count++;
 105     }
 106 #endif
 107 #if !defined(CONFIG_USER_ONLY)
 108     if (env->psret == 0) {
 109         if (cs->exception_index == 0x80 &&
 110             env->def->features & CPU_FEATURE_TA0_SHUTDOWN) {
 111             qemu_system_shutdown_request();
 112         } else {
 113             cpu_abort(cs, "Trap 0x%02x while interrupts disabled, Error state",
 114                       cs->exception_index);
 115         }
 116         return;
 117     }
 118 #endif
 119     env->psret = 0;
 120     cwp = cpu_cwp_dec(env, env->cwp - 1);
 121     cpu_set_cwp(env, cwp);
 122     env->regwptr[9] = env->pc;
 123     env->regwptr[10] = env->npc;
 124     env->psrps = env->psrs;
 125     env->psrs = 1;
 126     env->tbr = (env->tbr & TBR_BASE_MASK) | (intno << 4);
 127     env->pc = env->tbr;
 128     env->npc = env->pc + 4;
 129     cs->exception_index = -1;
 130
 131 #if !defined(CONFIG_USER_ONLY)
 132     /* IRQ acknowledgment */
 133     if ((intno & ~15) == TT_EXTINT && env->qemu_irq_ack != NULL) {
 134         env->qemu_irq_ack(env, env->irq_manager, intno);
 135     }
 136 #endif
 137 }
 138
 139 #if !defined(CONFIG_USER_ONLY)
 140 static void leon3_cache_control_int(CPUSPARCState *env)
 141 {
 142     uint32_t state = 0;
 143
 144     if (env->cache_control & CACHE_CTRL_IF) {
 145         /* Instruction cache state */
 146         state = env->cache_control & CACHE_STATE_MASK;
 147         if (state == CACHE_ENABLED) {
 148             state = CACHE_FROZEN;
 149             trace_int_helper_icache_freeze();
 150         }
 151
 152         env->cache_control &= ~CACHE_STATE_MASK;
 153         env->cache_control |= state;
 154     }
 155
 156     if (env->cache_control & CACHE_CTRL_DF) {
 157         /* Data cache state */
 158         state = (env->cache_control >> 2) & CACHE_STATE_MASK;
 159         if (state == CACHE_ENABLED) {
 160             state = CACHE_FROZEN;
 161             trace_int_helper_dcache_freeze();
 162         }
 163
 164         env->cache_control &= ~(CACHE_STATE_MASK << 2);
 165         env->cache_control |= (state << 2);
 166     }
 167 }
 168
 169 void leon3_irq_manager(CPUSPARCState *env, void *irq_manager, int intno)
 170 {
 171     leon3_irq_ack(irq_manager, intno);
 172     leon3_cache_control_int(env);
 173 }
 174 #endif