diff options
Diffstat (limited to 'target-lm32/op_helper.c')
-rw-r--r-- | target-lm32/op_helper.c | 106 |
1 files changed, 106 insertions, 0 deletions
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 + |