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[Qemu-devel] [PATCH v4 2/6] target/arm: Allow setting M mode entry and s
From: |
Alistair Francis |
Subject: |
[Qemu-devel] [PATCH v4 2/6] target/arm: Allow setting M mode entry and sp |
Date: |
Thu, 5 Sep 2019 23:11:03 -0700 |
Add M mode initial entry PC and SP properties.
Signed-off-by: Alistair Francis <address@hidden>
---
target/arm/cpu.c | 52 +++++++++++++++++++++++++++++++++++++++++++-----
target/arm/cpu.h | 3 +++
2 files changed, 50 insertions(+), 5 deletions(-)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 2399c14471..315aa503f6 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -311,6 +311,9 @@ static void arm_cpu_reset(CPUState *s)
*/
initial_msp = ldl_p(rom);
initial_pc = ldl_p(rom + 4);
+ } else if (cpu->init_sp || cpu->init_entry) {
+ initial_msp = cpu->init_sp;
+ initial_pc = cpu->init_entry;
} else {
/* Address zero not covered by a ROM blob, or the ROM blob
* is in non-modifiable memory and this is a second reset after
@@ -1055,6 +1058,38 @@ static void arm_set_init_svtor(Object *obj, Visitor *v,
const char *name,
visit_type_uint32(v, name, &cpu->init_svtor, errp);
}
+static void arm_get_init_sp(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ visit_type_uint32(v, name, &cpu->init_sp, errp);
+}
+
+static void arm_set_init_sp(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ visit_type_uint32(v, name, &cpu->init_sp, errp);
+}
+
+static void arm_get_init_entry(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ visit_type_uint32(v, name, &cpu->init_entry, errp);
+}
+
+static void arm_set_init_entry(Object *obj, Visitor *v, const char *name,
+ void *opaque, Error **errp)
+{
+ ARMCPU *cpu = ARM_CPU(obj);
+
+ visit_type_uint32(v, name, &cpu->init_entry, errp);
+}
+
void arm_cpu_post_init(Object *obj)
{
ARMCPU *cpu = ARM_CPU(obj);
@@ -1155,19 +1190,26 @@ void arm_cpu_post_init(Object *obj)
}
}
+ /*
+ * M profile: initial value of the SP, entry and Secure VTOR.
+ * We can't just use a simple DEFINE_PROP_UINT32 for this because we want
+ * to permit the property to be set after realize.
+ */
if (arm_feature(&cpu->env, ARM_FEATURE_M_SECURITY)) {
object_property_add_link(obj, "idau", TYPE_IDAU_INTERFACE, &cpu->idau,
qdev_prop_allow_set_link_before_realize,
OBJ_PROP_LINK_STRONG,
&error_abort);
- /*
- * M profile: initial value of the Secure VTOR. We can't just use
- * a simple DEFINE_PROP_UINT32 for this because we want to permit
- * the property to be set after realize.
- */
object_property_add(obj, "init-svtor", "uint32",
arm_get_init_svtor, arm_set_init_svtor,
NULL, NULL, &error_abort);
+ } else if (arm_feature(&cpu->env, ARM_FEATURE_M)) {
+ object_property_add(obj, "init-sp", "uint32",
+ arm_get_init_sp, arm_set_init_sp,
+ NULL, NULL, &error_abort);
+ object_property_add(obj, "init-entry", "uint32",
+ arm_get_init_entry, arm_set_init_entry,
+ NULL, NULL, &error_abort);
}
qdev_property_add_static(DEVICE(obj), &arm_cpu_cfgend_property,
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 297ad5e47a..4856d4c36b 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -805,6 +805,9 @@ struct ARMCPU {
*/
uint32_t psci_conduit;
+ /* For M, initial value of the entry and SP */
+ uint32_t init_sp, init_entry;
+
/* For v8M, initial value of the Secure VTOR */
uint32_t init_svtor;
--
2.22.0
- [Qemu-devel] [PATCH v4 0/6] Add the STM32F405 and Netduino Plus 2 machine, Alistair Francis, 2019/09/06
- [Qemu-devel] [PATCH v4 1/6] armv7m: Allow entry information to be returned, Alistair Francis, 2019/09/06
- [Qemu-devel] [PATCH v4 2/6] target/arm: Allow setting M mode entry and sp,
Alistair Francis <=
- [Qemu-devel] [PATCH v4 3/6] hw/misc: Add the STM32F4xx Sysconfig device, Alistair Francis, 2019/09/06
- [Qemu-devel] [PATCH v4 4/6] hw/misc: Add the STM32F4xx EXTI device, Alistair Francis, 2019/09/06
- [Qemu-devel] [PATCH v4 5/6] hw/arm: Add the STM32F4xx SoC, Alistair Francis, 2019/09/06
- [Qemu-devel] [PATCH v4 6/6] hw/arm: Add the Netduino Plus 2, Alistair Francis, 2019/09/06
- Re: [Qemu-devel] [PATCH v4 0/6] Add the STM32F405 and Netduino Plus 2 machine, no-reply, 2019/09/06
- Re: [Qemu-devel] [PATCH v4 0/6] Add the STM32F405 and Netduino Plus 2 machine, Peter Maydell, 2019/09/11