1 files changed, 162 insertions, 0 deletions
diff --git a/target/lm32/op_helper.c b/target/lm32/op_helper.c
new file mode 100644
index 0000000000..2177c8ad12
--- /dev/null
+++ b/target/lm32/op_helper.c
@@ -0,0 +1,162 @@
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "qemu/host-utils.h"
+
+#include "hw/lm32/lm32_pic.h"
+#include "hw/char/lm32_juart.h"
+
+#include "exec/exec-all.h"
+#include "exec/cpu_ldst.h"
+
+#ifndef CONFIG_USER_ONLY
+#include "sysemu/sysemu.h"
+#endif
+
+#if !defined(CONFIG_USER_ONLY)
+void raise_exception(CPULM32State *env, int index)
+{
+    CPUState *cs = CPU(lm32_env_get_cpu(env));
+
+    cs->exception_index = index;
+    cpu_loop_exit(cs);
+}
+
+void HELPER(raise_exception)(CPULM32State *env, uint32_t index)
+{
+    raise_exception(env, index);
+}
+
+void HELPER(hlt)(CPULM32State *env)
+{
+    CPUState *cs = CPU(lm32_env_get_cpu(env));
+
+    cs->halted = 1;
+    cs->exception_index = EXCP_HLT;
+    cpu_loop_exit(cs);
+}
+
+void HELPER(ill)(CPULM32State *env)
+{
+#ifndef CONFIG_USER_ONLY
+    CPUState *cs = CPU(lm32_env_get_cpu(env));
+    fprintf(stderr, "VM paused due to illegal instruction. "
+            "Connect a debugger or switch to the monitor console "
+            "to find out more.\n");
+    vm_stop(RUN_STATE_PAUSED);
+    cs->halted = 1;
+    raise_exception(env, EXCP_HALTED);
+#endif
+}
+
+void HELPER(wcsr_bp)(CPULM32State *env, uint32_t bp, uint32_t idx)
+{
+    uint32_t addr = bp & ~1;
+
+    assert(idx < 4);
+
+    env->bp[idx] = bp;
+    lm32_breakpoint_remove(env, idx);
+    if (bp & 1) {
+        lm32_breakpoint_insert(env, idx, addr);
+    }
+}
+
+void HELPER(wcsr_wp)(CPULM32State *env, uint32_t wp, uint32_t idx)
+{
+    lm32_wp_t wp_type;
+
+    assert(idx < 4);
+
+    env->wp[idx] = wp;
+
+    wp_type = lm32_wp_type(env->dc, idx);
+    lm32_watchpoint_remove(env, idx);
+    if (wp_type != LM32_WP_DISABLED) {
+        lm32_watchpoint_insert(env, idx, wp, wp_type);
+    }
+}
+
+void HELPER(wcsr_dc)(CPULM32State *env, uint32_t dc)
+{
+    uint32_t old_dc;
+    int i;
+    lm32_wp_t old_type;
+    lm32_wp_t new_type;
+
+    old_dc = env->dc;
+    env->dc = dc;
+
+    for (i = 0; i < 4; i++) {
+        old_type = lm32_wp_type(old_dc, i);
+        new_type = lm32_wp_type(dc, i);
+
+        if (old_type != new_type) {
+            lm32_watchpoint_remove(env, i);
+            if (new_type != LM32_WP_DISABLED) {
+                lm32_watchpoint_insert(env, i, env->wp[i], new_type);
+            }
+        }
+    }
+}
+
+void HELPER(wcsr_im)(CPULM32State *env, uint32_t im)
+{
+    lm32_pic_set_im(env->pic_state, im);
+}
+
+void HELPER(wcsr_ip)(CPULM32State *env, uint32_t im)
+{
+    lm32_pic_set_ip(env->pic_state, im);
+}
+
+void HELPER(wcsr_jtx)(CPULM32State *env, uint32_t jtx)
+{
+    lm32_juart_set_jtx(env->juart_state, jtx);
+}
+
+void HELPER(wcsr_jrx)(CPULM32State *env, uint32_t jrx)
+{
+    lm32_juart_set_jrx(env->juart_state, jrx);
+}
+
+uint32_t HELPER(rcsr_im)(CPULM32State *env)
+{
+    return lm32_pic_get_im(env->pic_state);
+}
+
+uint32_t HELPER(rcsr_ip)(CPULM32State *env)
+{
+    return lm32_pic_get_ip(env->pic_state);
+}
+
+uint32_t HELPER(rcsr_jtx)(CPULM32State *env)
+{
+    return lm32_juart_get_jtx(env->juart_state);
+}
+
+uint32_t HELPER(rcsr_jrx)(CPULM32State *env)
+{
+    return lm32_juart_get_jrx(env->juart_state);
+}
+
+/* Try to fill the TLB and return an exception if error. If retaddr is
+ * NULL, it means that the function was called in C code (i.e. not
+ * from generated code or from helper.c)
+ */
+void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
+              int mmu_idx, uintptr_t retaddr)
+{
+    int ret;
+
+    ret = lm32_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
+    if (unlikely(ret)) {
+        if (retaddr) {
+            /* now we have a real cpu fault */
+            cpu_restore_state(cs, retaddr);
+        }
+        cpu_loop_exit(cs);
+    }
+}
+#endif
+