target-lm32/op_helper.c

   1 #include <assert.h>
   2 #include "cpu.h"
   3 #include "dyngen-exec.h"
   4 #include "helper.h"
   5 #include "host-utils.h"
   6
   7 #include "hw/lm32_pic.h"
   8 #include "hw/lm32_juart.h"
   9
  10 #if !defined(CONFIG_USER_ONLY)
  11 #define MMUSUFFIX _mmu
  12 #define SHIFT 0
  13 #include "softmmu_template.h"
  14 #define SHIFT 1
  15 #include "softmmu_template.h"
  16 #define SHIFT 2
  17 #include "softmmu_template.h"
  18 #define SHIFT 3
  19 #include "softmmu_template.h"
  20
  21 void helper_raise_exception(uint32_t index)
  22 {
  23     env->exception_index = index;
  24     cpu_loop_exit(env);
  25 }
  26
  27 void helper_hlt(void)
  28 {
  29     env->halted = 1;
  30     env->exception_index = EXCP_HLT;
  31     cpu_loop_exit(env);
  32 }
  33
  34 void helper_wcsr_im(uint32_t im)
  35 {
  36     lm32_pic_set_im(env->pic_state, im);
  37 }
  38
  39 void helper_wcsr_ip(uint32_t im)
  40 {
  41     lm32_pic_set_ip(env->pic_state, im);
  42 }
  43
  44 void helper_wcsr_jtx(uint32_t jtx)
  45 {
  46     lm32_juart_set_jtx(env->juart_state, jtx);
  47 }
  48
  49 void helper_wcsr_jrx(uint32_t jrx)
  50 {
  51     lm32_juart_set_jrx(env->juart_state, jrx);
  52 }
  53
  54 uint32_t helper_rcsr_im(void)
  55 {
  56     return lm32_pic_get_im(env->pic_state);
  57 }
  58
  59 uint32_t helper_rcsr_ip(void)
  60 {
  61     return lm32_pic_get_ip(env->pic_state);
  62 }
  63
  64 uint32_t helper_rcsr_jtx(void)
  65 {
  66     return lm32_juart_get_jtx(env->juart_state);
  67 }
  68
  69 uint32_t helper_rcsr_jrx(void)
  70 {
  71     return lm32_juart_get_jrx(env->juart_state);
  72 }
  73
  74 /* Try to fill the TLB and return an exception if error. If retaddr is
  75    NULL, it means that the function was called in C code (i.e. not
  76    from generated code or from helper.c) */
  77 /* XXX: fix it to restore all registers */
  78 void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr)
  79 {
  80     TranslationBlock *tb;
  81     CPUState *saved_env;
  82     unsigned long pc;
  83     int ret;
  84
  85     /* XXX: hack to restore env in all cases, even if not called from
  86        generated code */
  87     saved_env = env;
  88     env = cpu_single_env;
  89
  90     ret = cpu_lm32_handle_mmu_fault(env, addr, is_write, mmu_idx);
  91     if (unlikely(ret)) {
  92         if (retaddr) {
  93             /* now we have a real cpu fault */
  94             pc = (unsigned long)retaddr;
  95             tb = tb_find_pc(pc);
  96             if (tb) {
  97                 /* the PC is inside the translated code. It means that we have
  98                    a virtual CPU fault */
  99                 cpu_restore_state(tb, env, pc);
 100             }
 101         }
 102         cpu_loop_exit(env);
 103     }
 104     env = saved_env;
 105 }
 106 #endif
 107