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authorMichael Walle <michael@walle.cc>2011-02-17 23:45:04 +0100
committerEdgar E. Iglesias <edgar.iglesias@gmail.com>2011-03-07 13:42:36 +0100
commit143e8951e40c7dfcc985801ac93a7e58e2e44985 (patch)
tree9354b602343e64394c8931b1e7e1ce3ff1dde541
parent17c0fa3d57ee1ee456a948b16b2905bf87833b8f (diff)
lm32: translation code helper
This patch adds translation helper functions. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
-rw-r--r--target-lm32/helper.h14
-rw-r--r--target-lm32/op_helper.c106
2 files changed, 120 insertions, 0 deletions
diff --git a/target-lm32/helper.h b/target-lm32/helper.h
new file mode 100644
index 0000000000..9d335efc45
--- /dev/null
+++ b/target-lm32/helper.h
@@ -0,0 +1,14 @@
+#include "def-helper.h"
+
+DEF_HELPER_1(raise_exception, void, i32)
+DEF_HELPER_0(hlt, void)
+DEF_HELPER_1(wcsr_im, void, i32)
+DEF_HELPER_1(wcsr_ip, void, i32)
+DEF_HELPER_1(wcsr_jtx, void, i32)
+DEF_HELPER_1(wcsr_jrx, void, i32)
+DEF_HELPER_0(rcsr_im, i32)
+DEF_HELPER_0(rcsr_ip, i32)
+DEF_HELPER_0(rcsr_jtx, i32)
+DEF_HELPER_0(rcsr_jrx, i32)
+
+#include "def-helper.h"
diff --git a/target-lm32/op_helper.c b/target-lm32/op_helper.c
new file mode 100644
index 0000000000..e84ba488be
--- /dev/null
+++ b/target-lm32/op_helper.c
@@ -0,0 +1,106 @@
+#include <assert.h>
+#include "exec.h"
+#include "helper.h"
+#include "host-utils.h"
+
+#include "hw/lm32_pic.h"
+#include "hw/lm32_juart.h"
+
+#if !defined(CONFIG_USER_ONLY)
+#define MMUSUFFIX _mmu
+#define SHIFT 0
+#include "softmmu_template.h"
+#define SHIFT 1
+#include "softmmu_template.h"
+#define SHIFT 2
+#include "softmmu_template.h"
+#define SHIFT 3
+#include "softmmu_template.h"
+
+void helper_raise_exception(uint32_t index)
+{
+ env->exception_index = index;
+ cpu_loop_exit();
+}
+
+void helper_hlt(void)
+{
+ env->halted = 1;
+ env->exception_index = EXCP_HLT;
+ cpu_loop_exit();
+}
+
+void helper_wcsr_im(uint32_t im)
+{
+ lm32_pic_set_im(env->pic_state, im);
+}
+
+void helper_wcsr_ip(uint32_t im)
+{
+ lm32_pic_set_ip(env->pic_state, im);
+}
+
+void helper_wcsr_jtx(uint32_t jtx)
+{
+ lm32_juart_set_jtx(env->juart_state, jtx);
+}
+
+void helper_wcsr_jrx(uint32_t jrx)
+{
+ lm32_juart_set_jrx(env->juart_state, jrx);
+}
+
+uint32_t helper_rcsr_im(void)
+{
+ return lm32_pic_get_im(env->pic_state);
+}
+
+uint32_t helper_rcsr_ip(void)
+{
+ return lm32_pic_get_ip(env->pic_state);
+}
+
+uint32_t helper_rcsr_jtx(void)
+{
+ return lm32_juart_get_jtx(env->juart_state);
+}
+
+uint32_t helper_rcsr_jrx(void)
+{
+ 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) */
+/* XXX: fix it to restore all registers */
+void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr)
+{
+ TranslationBlock *tb;
+ CPUState *saved_env;
+ unsigned long pc;
+ int ret;
+
+ /* XXX: hack to restore env in all cases, even if not called from
+ generated code */
+ saved_env = env;
+ env = cpu_single_env;
+
+ ret = cpu_lm32_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
+ if (unlikely(ret)) {
+ if (retaddr) {
+ /* now we have a real cpu fault */
+ pc = (unsigned long)retaddr;
+ tb = tb_find_pc(pc);
+ if (tb) {
+ /* the PC is inside the translated code. It means that we have
+ a virtual CPU fault */
+ cpu_restore_state(tb, env, pc, NULL);
+ }
+ }
+ cpu_loop_exit();
+ }
+ env = saved_env;
+}
+#endif
+