LXR qemu/target-lm32/op

   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)
  17void 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
  25void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
  26{
  27    raise_exception(env, index);
  28}
  29
  30void 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
  39void 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
  52void 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
  65void 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
  80void 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
 103void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
 104{
 105    lm32_pic_set_im(env->pic_state, im);
 106}
 107
 108void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
 109{
 110    lm32_pic_set_ip(env->pic_state, im);
 111}
 112
 113void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
 114{
 115    lm32_juart_set_jtx(env->juart_state, jtx);
 116}
 117
 118void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
 119{
 120    lm32_juart_set_jrx(env->juart_state, jrx);
 121}
 122
 123uint32_t HELPER(rcsr_im)(CPULM32State *env)
 124{
 125    return lm32_pic_get_im(env->pic_state);
 126}
 127
 128uint32_t HELPER(rcsr_ip)(CPULM32State *env)
 129{
 130    return lm32_pic_get_ip(env->pic_state);
 131}
 132
 133uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
 134{
 135    return lm32_juart_get_jtx(env->juart_state);
 136}
 137
 138uint32_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 */
 147void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 148              int mmu_idx, uintptr_t retaddr)
 149{
 150    int ret;
 151
 152    ret = lm32_cpu_handle_mmu_fault(cs, addr, access_type, 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
 163