target-lm32/op_helper.c

   1 #include <assert.h>
   2 #include "cpu.h"
   3 #include "exec/helper-proto.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/cpu_ldst.h"
  10
  11 #ifndef CONFIG_USER_ONLY
  12 #include "sysemu/sysemu.h"
  13 #endif
  14
  15 #if !defined(CONFIG_USER_ONLY)
  16 void raise_exception(CPULM32State *env, int index)
  17 {
  18     CPUState *cs = CPU(lm32_env_get_cpu(env));
  19
  20     cs->exception_index = index;
  21     cpu_loop_exit(cs);
  22 }
  23
  24 void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
  25 {
  26     raise_exception(env, index);
  27 }
  28
  29 void HELPER(hlt)(CPULM32State *env)
  30 {
  31     CPUState *cs = CPU(lm32_env_get_cpu(env));
  32
  33     cs->halted = 1;
  34     cs->exception_index = EXCP_HLT;
  35     cpu_loop_exit(cs);
  36 }
  37
  38 void HELPER(ill)(CPULM32State *env)
  39 {
  40 #ifndef CONFIG_USER_ONLY
  41     CPUState *cs = CPU(lm32_env_get_cpu(env));
  42     fprintf(stderr, "VM paused due to illegal instruction. "
  43             "Connect a debugger or switch to the monitor console "
  44             "to find out more.\n");
  45     vm_stop(RUN_STATE_PAUSED);
  46     cs->halted = 1;
  47     raise_exception(env, EXCP_HALTED);
  48 #endif
  49 }
  50
  51 void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
  52 {
  53     uint32_t addr = bp & ~1;
  54
  55     assert(idx < 4);
  56
  57     env->bp[idx] = bp;
  58     lm32_breakpoint_remove(env, idx);
  59     if (bp & 1) {
  60         lm32_breakpoint_insert(env, idx, addr);
  61     }
  62 }
  63
  64 void HELPER(wcsr_wp)(CPULM32State *env, uint32_t wp, uint32_t idx)
  65 {
  66     lm32_wp_t wp_type;
  67
  68     assert(idx < 4);
  69
  70     env->wp[idx] = wp;
  71
  72     wp_type = lm32_wp_type(env->dc, idx);
  73     lm32_watchpoint_remove(env, idx);
  74     if (wp_type != LM32_WP_DISABLED) {
  75         lm32_watchpoint_insert(env, idx, wp, wp_type);
  76     }
  77 }
  78
  79 void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
  80 {
  81     uint32_t old_dc;
  82     int i;
  83     lm32_wp_t old_type;
  84     lm32_wp_t new_type;
  85
  86     old_dc = env->dc;
  87     env->dc = dc;
  88
  89     for (i = 0; i < 4; i++) {
  90         old_type = lm32_wp_type(old_dc, i);
  91         new_type = lm32_wp_type(dc, i);
  92
  93         if (old_type != new_type) {
  94             lm32_watchpoint_remove(env, i);
  95             if (new_type != LM32_WP_DISABLED) {
  96                 lm32_watchpoint_insert(env, i, env->wp[i], new_type);
  97             }
  98         }
  99     }
 100 }
 101
 102 void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
 103 {
 104     lm32_pic_set_im(env->pic_state, im);
 105 }
 106
 107 void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
 108 {
 109     lm32_pic_set_ip(env->pic_state, im);
 110 }
 111
 112 void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
 113 {
 114     lm32_juart_set_jtx(env->juart_state, jtx);
 115 }
 116
 117 void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
 118 {
 119     lm32_juart_set_jrx(env->juart_state, jrx);
 120 }
 121
 122 uint32_t HELPER(rcsr_im)(CPULM32State *env)
 123 {
 124     return lm32_pic_get_im(env->pic_state);
 125 }
 126
 127 uint32_t HELPER(rcsr_ip)(CPULM32State *env)
 128 {
 129     return lm32_pic_get_ip(env->pic_state);
 130 }
 131
 132 uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
 133 {
 134     return lm32_juart_get_jtx(env->juart_state);
 135 }
 136
 137 uint32_t HELPER(rcsr_jrx)(CPULM32State *env)
 138 {
 139     return lm32_juart_get_jrx(env->juart_state);
 140 }
 141
 142 /* Try to fill the TLB and return an exception if error. If retaddr is
 143  * NULL, it means that the function was called in C code (i.e. not
 144  * from generated code or from helper.c)
 145  */
 146 void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
 147               uintptr_t retaddr)
 148 {
 149     int ret;
 150
 151     ret = lm32_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
 152     if (unlikely(ret)) {
 153         if (retaddr) {
 154             /* now we have a real cpu fault */
 155             cpu_restore_state(cs, retaddr);
 156         }
 157         cpu_loop_exit(cs);
 158     }
 159 }
 160 #endif
 161