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[Qemu-devel] [PATCH 26/26] target-xtensa: implement relocatable vectors
From: |
Max Filippov |
Subject: |
[Qemu-devel] [PATCH 26/26] target-xtensa: implement relocatable vectors |
Date: |
Wed, 18 May 2011 02:32:52 +0400 |
See ISA, 4.4.3 for details.
Vector addresses recorded in core configuration are absolute values that
correspond to default VECBASE value.
Signed-off-by: Max Filippov <address@hidden>
---
target-xtensa/cpu.h | 2 ++
target-xtensa/helper.c | 18 ++++++++++++++++--
target-xtensa/translate.c | 1 +
3 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/target-xtensa/cpu.h b/target-xtensa/cpu.h
index de3408f..d1d5b2b 100644
--- a/target-xtensa/cpu.h
+++ b/target-xtensa/cpu.h
@@ -123,6 +123,7 @@ enum {
INTCLEAR = 227,
INTENABLE = 228,
PS = 230,
+ VECBASE = 231,
EXCCAUSE = 232,
CCOUNT = 234,
PRID = 235,
@@ -218,6 +219,7 @@ typedef struct XtensaConfig {
unsigned nareg;
int excm_level;
int ndepc;
+ uint32_t vecbase;
uint32_t exception_vector[EXC_MAX];
unsigned ninterrupt;
unsigned nlevel;
diff --git a/target-xtensa/helper.c b/target-xtensa/helper.c
index 4c3069f..28d36ae 100644
--- a/target-xtensa/helper.c
+++ b/target-xtensa/helper.c
@@ -40,6 +40,7 @@ void cpu_reset(CPUXtensaState *env)
env->pc = env->config->exception_vector[EXC_RESET];
env->sregs[LITBASE] &= ~1;
env->sregs[PS] = 0x1f;
+ env->sregs[VECBASE] = env->config->vecbase;
env->pending_irq_level = 0;
}
@@ -51,6 +52,7 @@ static const XtensaConfig core_config[] = {
.nareg = 64,
.ndepc = 1,
.excm_level = 16,
+ .vecbase = 0x5fff8400,
.exception_vector = {
[EXC_RESET] = 0x5fff8000,
[EXC_WINDOW_OVERFLOW4] = 0x5fff8400,
@@ -137,6 +139,16 @@ target_phys_addr_t cpu_get_phys_page_debug(CPUState *env,
target_ulong addr)
return addr;
}
+static uint32_t relocated_vector(CPUState *env, uint32_t vector)
+{
+ if (xtensa_option_enabled(env->config,
+ XTENSA_OPTION_RELOCATABLE_VECTOR)) {
+ return vector - env->config->vecbase + env->sregs[VECBASE];
+ } else {
+ return vector;
+ }
+}
+
static int handle_interrupt(CPUState *env)
{
int handled = 1;
@@ -150,7 +162,8 @@ static int handle_interrupt(CPUState *env)
if (level > 1) {
env->sregs[EPC1 + level - 1] = env->pc;
env->sregs[EPS2 + level - 2] = env->sregs[PS];
- env->pc = env->config->interrupt_vector[level];
+ env->pc = relocated_vector(env,
+ env->config->interrupt_vector[level]);
} else {
handled = 0;
env->sregs[EXCCAUSE] = LEVEL1_INTERRUPT_CAUSE;
@@ -196,7 +209,8 @@ void do_interrupt(CPUState *env)
case EXC_USER:
case EXC_DOUBLE:
if (env->config->exception_vector[env->exception_index]) {
- env->pc = env->config->exception_vector[env->exception_index];
+ env->pc = relocated_vector(env,
+ env->config->exception_vector[env->exception_index]);
env->exception_taken = 1;
env->interrupt_request |= CPU_INTERRUPT_EXITTB;
} else {
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index 8d25bde..8efe609 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -104,6 +104,7 @@ static const char * const sregnames[256] = {
[INTCLEAR] = "INTCLEAR",
[INTENABLE] = "INTENABLE",
[PS] = "PS",
+ [VECBASE] = "VECBASE",
[EXCCAUSE] = "EXCCAUSE",
[CCOUNT] = "CCOUNT",
[PRID] = "PRID",
--
1.7.3.4
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, (continued)
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Richard Henderson, 2011/05/20
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Max Filippov, 2011/05/20
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Richard Henderson, 2011/05/20
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Max Filippov, 2011/05/24
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Richard Henderson, 2011/05/24
- Re: [Qemu-devel] [PATCH 23/26] target-xtensa: implement interrupt option, Max Filippov, 2011/05/24
[Qemu-devel] [PATCH 24/26] target-xtensa: implement accurate window check, Max Filippov, 2011/05/17
[Qemu-devel] [PATCH 25/26] target-xtensa: implement CPENABLE and PRID SRs, Max Filippov, 2011/05/17
[Qemu-devel] [PATCH 26/26] target-xtensa: implement relocatable vectors,
Max Filippov <=