From 40643d7c0fe4dc967ebc2f75e6758a4649776949 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Tue, 6 Sep 2011 03:55:41 +0400 Subject: target-xtensa: implement exceptions - mark privileged opcodes with ring check; - make debug exception on exception handler entry. Signed-off-by: Max Filippov Signed-off-by: Blue Swirl --- target-xtensa/helper.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'target-xtensa/helper.c') diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c index 83b8a041c1..44ebb9f29d 100644 --- a/target-xtensa/helper.c +++ b/target-xtensa/helper.c @@ -36,7 +36,8 @@ void cpu_reset(CPUXtensaState *env) { - env->pc = 0; + env->exception_taken = 0; + env->pc = env->config->exception_vector[EXC_RESET]; env->sregs[PS] = 0x1f; } @@ -44,6 +45,20 @@ static const XtensaConfig core_config[] = { { .name = "sample-xtensa-core", .options = -1, + .ndepc = 1, + .excm_level = 16, + .exception_vector = { + [EXC_RESET] = 0x5fff8000, + [EXC_WINDOW_OVERFLOW4] = 0x5fff8400, + [EXC_WINDOW_UNDERFLOW4] = 0x5fff8440, + [EXC_WINDOW_OVERFLOW8] = 0x5fff8480, + [EXC_WINDOW_UNDERFLOW8] = 0x5fff84c0, + [EXC_WINDOW_OVERFLOW12] = 0x5fff8500, + [EXC_WINDOW_UNDERFLOW12] = 0x5fff8540, + [EXC_KERNEL] = 0x5fff861c, + [EXC_USER] = 0x5fff863c, + [EXC_DOUBLE] = 0x5fff865c, + }, }, }; @@ -94,4 +109,24 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) void do_interrupt(CPUState *env) { + switch (env->exception_index) { + case EXC_WINDOW_OVERFLOW4: + case EXC_WINDOW_UNDERFLOW4: + case EXC_WINDOW_OVERFLOW8: + case EXC_WINDOW_UNDERFLOW8: + case EXC_WINDOW_OVERFLOW12: + case EXC_WINDOW_UNDERFLOW12: + case EXC_KERNEL: + case EXC_USER: + case EXC_DOUBLE: + if (env->config->exception_vector[env->exception_index]) { + env->pc = env->config->exception_vector[env->exception_index]; + env->exception_taken = 1; + } else { + qemu_log("%s(pc = %08x) bad exception_index: %d\n", + __func__, env->pc, env->exception_index); + } + break; + + } } -- cgit v1.2.1