target-lm32/op_helper.c

   1 #include <assert.h>
   2 #include "cpu.h"
   3 #include "helper.h"
   4 #include "qemu/host-utils.h"
   5
   6 #include "hw/lm32/lm32_pic.h"
   7 #include "hw/char/lm32_juart.h"
   8
   9 #include "exec/softmmu_exec.h"
  10
  11 #ifndef CONFIG_USER_ONLY
  12 #include "sysemu/sysemu.h"
  13 #endif
  14
  15 #if !defined(CONFIG_USER_ONLY)
  16 #define MMUSUFFIX _mmu
  17 #define SHIFT 0
  18 #include "exec/softmmu_template.h"
  19 #define SHIFT 1
  20 #include "exec/softmmu_template.h"
  21 #define SHIFT 2
  22 #include "exec/softmmu_template.h"
  23 #define SHIFT 3
  24 #include "exec/softmmu_template.h"
  25
  26 void raise_exception(CPULM32State *env, int index)
  27 {
  28     env->exception_index = index;
  29     cpu_loop_exit(env);
  30 }
  31
  32 void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
  33 {
  34     raise_exception(env, index);
  35 }
  36
  37 void HELPER(hlt)(CPULM32State *env)
  38 {
  39     CPUState *cs = CPU(lm32_env_get_cpu(env));
  40
  41     cs->halted = 1;
  42     env->exception_index = EXCP_HLT;
  43     cpu_loop_exit(env);
  44 }
  45
  46 void HELPER(ill)(CPULM32State *env)
  47 {
  48 #ifndef CONFIG_USER_ONLY
  49     CPUState *cs = CPU(lm32_env_get_cpu(env));
  50     fprintf(stderr, "VM paused due to illegal instruction. "
  51             "Connect a debugger or switch to the monitor console "
  52             "to find out more.\n");
  53     qemu_system_vmstop_request(RUN_STATE_PAUSED);
  54     cs->halted = 1;
  55     raise_exception(env, EXCP_HALTED);
  56 #endif
  57 }
  58
  59 void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
  60 {
  61     uint32_t addr = bp & ~1;
  62
  63     assert(idx < 4);
  64
  65     env->bp[idx] = bp;
  66     lm32_breakpoint_remove(env, idx);
  67     if (bp & 1) {
  68         lm32_breakpoint_insert(env, idx, addr);
  69     }
  70 }
  71
  72 void HELPER(wcsr_wp)(CPULM32State *env, uint32_t wp, uint32_t idx)
  73 {
  74     lm32_wp_t wp_type;
  75
  76     assert(idx < 4);
  77
  78     env->wp[idx] = wp;
  79
  80     wp_type = lm32_wp_type(env->dc, idx);
  81     lm32_watchpoint_remove(env, idx);
  82     if (wp_type != LM32_WP_DISABLED) {
  83         lm32_watchpoint_insert(env, idx, wp, wp_type);
  84     }
  85 }
  86
  87 void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
  88 {
  89     uint32_t old_dc;
  90     int i;
  91     lm32_wp_t old_type;
  92     lm32_wp_t new_type;
  93
  94     old_dc = env->dc;
  95     env->dc = dc;
  96
  97     for (i = 0; i < 4; i++) {
  98         old_type = lm32_wp_type(old_dc, i);
  99         new_type = lm32_wp_type(dc, i);
 100
 101         if (old_type != new_type) {
 102             lm32_watchpoint_remove(env, i);
 103             if (new_type != LM32_WP_DISABLED) {
 104                 lm32_watchpoint_insert(env, i, env->wp[i], new_type);
 105             }
 106         }
 107     }
 108 }
 109
 110 void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
 111 {
 112     lm32_pic_set_im(env->pic_state, im);
 113 }
 114
 115 void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
 116 {
 117     lm32_pic_set_ip(env->pic_state, im);
 118 }
 119
 120 void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
 121 {
 122     lm32_juart_set_jtx(env->juart_state, jtx);
 123 }
 124
 125 void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
 126 {
 127     lm32_juart_set_jrx(env->juart_state, jrx);
 128 }
 129
 130 uint32_t HELPER(rcsr_im)(CPULM32State *env)
 131 {
 132     return lm32_pic_get_im(env->pic_state);
 133 }
 134
 135 uint32_t HELPER(rcsr_ip)(CPULM32State *env)
 136 {
 137     return lm32_pic_get_ip(env->pic_state);
 138 }
 139
 140 uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
 141 {
 142     return lm32_juart_get_jtx(env->juart_state);
 143 }
 144
 145 uint32_t HELPER(rcsr_jrx)(CPULM32State *env)
 146 {
 147     return lm32_juart_get_jrx(env->juart_state);
 148 }
 149
 150 /* Try to fill the TLB and return an exception if error. If retaddr is
 151    NULL, it means that the function was called in C code (i.e. not
 152    from generated code or from helper.c) */
 153 void tlb_fill(CPULM32State *env, target_ulong addr, int is_write, int mmu_idx,
 154               uintptr_t retaddr)
 155 {
 156     int ret;
 157
 158     ret = cpu_lm32_handle_mmu_fault(env, addr, is_write, mmu_idx);
 159     if (unlikely(ret)) {
 160         if (retaddr) {
 161             /* now we have a real cpu fault */
 162             cpu_restore_state(env, retaddr);
 163         }
 164         cpu_loop_exit(env);
 165     }
 166 }
 167 #endif
 168