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/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     CPUState *cs = CPU(lm32_env_get_cpu(env));
  29
  30     cs->exception_index = index;
  31     cpu_loop_exit(cs);
  32 }
  33
  34 void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
  35 {
  36     raise_exception(env, index);
  37 }
  38
  39 void HELPER(hlt)(CPULM32State *env)
  40 {
  41     CPUState *cs = CPU(lm32_env_get_cpu(env));
  42
  43     cs->halted = 1;
  44     cs->exception_index = EXCP_HLT;
  45     cpu_loop_exit(cs);
  46 }
  47
  48 void HELPER(ill)(CPULM32State *env)
  49 {
  50 #ifndef CONFIG_USER_ONLY
  51     CPUState *cs = CPU(lm32_env_get_cpu(env));
  52     fprintf(stderr, "VM paused due to illegal instruction. "
  53             "Connect a debugger or switch to the monitor console "
  54             "to find out more.\n");
  55     qemu_system_vmstop_request(RUN_STATE_PAUSED);
  56     cs->halted = 1;
  57     raise_exception(env, EXCP_HALTED);
  58 #endif
  59 }
  60
  61 void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
  62 {
  63     uint32_t addr = bp & ~1;
  64
  65     assert(idx < 4);
  66
  67     env->bp[idx] = bp;
  68     lm32_breakpoint_remove(env, idx);
  69     if (bp & 1) {
  70         lm32_breakpoint_insert(env, idx, addr);
  71     }
  72 }
  73
  74 void HELPER(wcsr_wp)(CPULM32State *env, uint32_t wp, uint32_t idx)
  75 {
  76     lm32_wp_t wp_type;
  77
  78     assert(idx < 4);
  79
  80     env->wp[idx] = wp;
  81
  82     wp_type = lm32_wp_type(env->dc, idx);
  83     lm32_watchpoint_remove(env, idx);
  84     if (wp_type != LM32_WP_DISABLED) {
  85         lm32_watchpoint_insert(env, idx, wp, wp_type);
  86     }
  87 }
  88
  89 void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
  90 {
  91     uint32_t old_dc;
  92     int i;
  93     lm32_wp_t old_type;
  94     lm32_wp_t new_type;
  95
  96     old_dc = env->dc;
  97     env->dc = dc;
  98
  99     for (i = 0; i < 4; i++) {
 100         old_type = lm32_wp_type(old_dc, i);
 101         new_type = lm32_wp_type(dc, i);
 102
 103         if (old_type != new_type) {
 104             lm32_watchpoint_remove(env, i);
 105             if (new_type != LM32_WP_DISABLED) {
 106                 lm32_watchpoint_insert(env, i, env->wp[i], new_type);
 107             }
 108         }
 109     }
 110 }
 111
 112 void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
 113 {
 114     lm32_pic_set_im(env->pic_state, im);
 115 }
 116
 117 void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
 118 {
 119     lm32_pic_set_ip(env->pic_state, im);
 120 }
 121
 122 void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
 123 {
 124     lm32_juart_set_jtx(env->juart_state, jtx);
 125 }
 126
 127 void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
 128 {
 129     lm32_juart_set_jrx(env->juart_state, jrx);
 130 }
 131
 132 uint32_t HELPER(rcsr_im)(CPULM32State *env)
 133 {
 134     return lm32_pic_get_im(env->pic_state);
 135 }
 136
 137 uint32_t HELPER(rcsr_ip)(CPULM32State *env)
 138 {
 139     return lm32_pic_get_ip(env->pic_state);
 140 }
 141
 142 uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
 143 {
 144     return lm32_juart_get_jtx(env->juart_state);
 145 }
 146
 147 uint32_t HELPER(rcsr_jrx)(CPULM32State *env)
 148 {
 149     return lm32_juart_get_jrx(env->juart_state);
 150 }
 151
 152 /* Try to fill the TLB and return an exception if error. If retaddr is
 153  * NULL, it means that the function was called in C code (i.e. not
 154  * from generated code or from helper.c)
 155  */
 156 void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
 157               uintptr_t retaddr)
 158 {
 159     int ret;
 160
 161     ret = lm32_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx);
 162     if (unlikely(ret)) {
 163         if (retaddr) {
 164             /* now we have a real cpu fault */
 165             cpu_restore_state(cs, retaddr);
 166         }
 167         cpu_loop_exit(cs);
 168     }
 169 }
 170 #endif
 171