target-lm32/op_helper.c

   1 #include "qemu/osdep.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/exec-all.h"
  10 #include "exec/cpu_ldst.h"
  11
  12 #ifndef CONFIG_USER_ONLY
  13 #include "sysemu/sysemu.h"
  14 #endif
  15
  16 #if !defined(CONFIG_USER_ONLY)
  17 void raise_exception(CPULM32State *env, int index)
  18 {
  19     CPUState *cs = CPU(lm32_env_get_cpu(env));
  20
  21     cs->exception_index = index;
  22     cpu_loop_exit(cs);
  23 }
  24
  25 void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
  26 {
  27     raise_exception(env, index);
  28 }
  29
  30 void HELPER(hlt)(CPULM32State *env)
  31 {
  32     CPUState *cs = CPU(lm32_env_get_cpu(env));
  33
  34     cs->halted = 1;
  35     cs->exception_index = EXCP_HLT;
  36     cpu_loop_exit(cs);
  37 }
  38
  39 void HELPER(ill)(CPULM32State *env)
  40 {
  41 #ifndef CONFIG_USER_ONLY
  42     CPUState *cs = CPU(lm32_env_get_cpu(env));
  43     fprintf(stderr, "VM paused due to illegal instruction. "
  44             "Connect a debugger or switch to the monitor console "
  45             "to find out more.\n");
  46     vm_stop(RUN_STATE_PAUSED);
  47     cs->halted = 1;
  48     raise_exception(env, EXCP_HALTED);
  49 #endif
  50 }
  51
  52 void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
  53 {
  54     uint32_t addr = bp & ~1;
  55
  56     assert(idx < 4);
  57
  58     env->bp[idx] = bp;
  59     lm32_breakpoint_remove(env, idx);
  60     if (bp & 1) {
  61         lm32_breakpoint_insert(env, idx, addr);
  62     }
  63 }
  64
  65 void HELPER(wcsr_wp)(CPULM32State *env, uint32_t wp, uint32_t idx)
  66 {
  67     lm32_wp_t wp_type;
  68
  69     assert(idx < 4);
  70
  71     env->wp[idx] = wp;
  72
  73     wp_type = lm32_wp_type(env->dc, idx);
  74     lm32_watchpoint_remove(env, idx);
  75     if (wp_type != LM32_WP_DISABLED) {
  76         lm32_watchpoint_insert(env, idx, wp, wp_type);
  77     }
  78 }
  79
  80 void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
  81 {
  82     uint32_t old_dc;
  83     int i;
  84     lm32_wp_t old_type;
  85     lm32_wp_t new_type;
  86
  87     old_dc = env->dc;
  88     env->dc = dc;
  89
  90     for (i = 0; i < 4; i++) {
  91         old_type = lm32_wp_type(old_dc, i);
  92         new_type = lm32_wp_type(dc, i);
  93
  94         if (old_type != new_type) {
  95             lm32_watchpoint_remove(env, i);
  96             if (new_type != LM32_WP_DISABLED) {
  97                 lm32_watchpoint_insert(env, i, env->wp[i], new_type);
  98             }
  99         }
 100     }
 101 }
 102
 103 void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
 104 {
 105     lm32_pic_set_im(env->pic_state, im);
 106 }
 107
 108 void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
 109 {
 110     lm32_pic_set_ip(env->pic_state, im);
 111 }
 112
 113 void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
 114 {
 115     lm32_juart_set_jtx(env->juart_state, jtx);
 116 }
 117
 118 void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
 119 {
 120     lm32_juart_set_jrx(env->juart_state, jrx);
 121 }
 122
 123 uint32_t HELPER(rcsr_im)(CPULM32State *env)
 124 {
 125     return lm32_pic_get_im(env->pic_state);
 126 }
 127
 128 uint32_t HELPER(rcsr_ip)(CPULM32State *env)
 129 {
 130     return lm32_pic_get_ip(env->pic_state);
 131 }
 132
 133 uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
 134 {
 135     return lm32_juart_get_jtx(env->juart_state);
 136 }
 137
 138 uint32_t HELPER(rcsr_jrx)(CPULM32State *env)
 139 {
 140     return lm32_juart_get_jrx(env->juart_state);
 141 }
 142
 143 /* Try to fill the TLB and return an exception if error. If retaddr is
 144  * NULL, it means that the function was called in C code (i.e. not
 145  * from generated code or from helper.c)
 146  */
 147 void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
 148               uintptr_t retaddr)
 149 {
 150     int ret;
 151
 152     ret = lm32_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
 153     if (unlikely(ret)) {
 154         if (retaddr) {
 155             /* now we have a real cpu fault */
 156             cpu_restore_state(cs, retaddr);
 157         }
 158         cpu_loop_exit(cs);
 159     }
 160 }
 161 #endif
 162