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cortex_m: read and display core security state

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Change-Id: I0fce3c66af7e98df2dc2258daf0d6af661e29ae7
Signed-off-by: Laurent LEMELE <laurent.lemele@st.com>
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/5798
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Tarek BOCHKATI 2020-08-11 14:06:04 +01:00 committed by Antonio Borneo
parent 6e33947899
commit f2c83fade3
3 changed files with 25 additions and 1 deletions
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3
src/target/arm.h
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@ -197,6 +197,9 @@ struct arm {
/** Flag reporting armv6m based core. */
bool is_armv6m;
/** Flag reporting armv8m based core. */
bool is_armv8m;
/** Floating point or VFP version, 0 if disabled. */
int arm_vfp_version;

19
src/target/cortex_m.c
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@ -502,6 +502,18 @@ static int cortex_m_debug_entry(struct target *target)
if (retval != ERROR_OK)
return retval;
/* examine PE security state */
bool secure_state = false;
if (armv7m->arm.is_armv8m) {
uint32_t dscsr;
retval = mem_ap_read_u32(armv7m->debug_ap, DCB_DSCSR, &dscsr);
if (retval != ERROR_OK)
return retval;
secure_state = (dscsr & DSCSR_CDS) == DSCSR_CDS;
}
/* Examine target state and mode
* First load register accessible through core debug port */
int num_regs = arm->core_cache->num_regs;
@ -548,9 +560,10 @@ static int cortex_m_debug_entry(struct target *target)
if (armv7m->exception_number)
cortex_m_examine_exception_reason(target);
LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", target->state: %s",
LOG_DEBUG("entered debug state in core mode: %s at PC 0x%" PRIx32 ", cpu in %s state, target->state: %s",
arm_mode_name(arm->core_mode),
buf_get_u32(arm->pc->value, 0, 32),
secure_state ? "Secure" : "Non-Secure",
target_state_name(target));
if (armv7m->post_debug_entry) {
@ -2156,6 +2169,9 @@ int cortex_m_examine(struct target *target)
/* Get CPU Type */
i = (cpuid >> 4) & 0xf;
/* Check if it is an ARMv8-M core */
armv7m->arm.is_armv8m = true;
switch (cpuid & ARM_CPUID_PARTNO_MASK) {
case CORTEX_M23_PARTNO:
i = 23;
@ -2166,6 +2182,7 @@ int cortex_m_examine(struct target *target)
break;
default:
armv7m->arm.is_armv8m = false;
break;
}

4
src/target/cortex_m.h
View File

@ -50,6 +50,7 @@
#define DCB_DCRSR 0xE000EDF4
#define DCB_DCRDR 0xE000EDF8
#define DCB_DEMCR 0xE000EDFC
#define DCB_DSCSR 0xE000EE08
#define DCRSR_WnR BIT(16)
@ -114,6 +115,9 @@
#define VC_MMERR BIT(4)
#define VC_CORERESET BIT(0)
/* DCB_DSCSR bit and field definitions */
#define DSCSR_CDS BIT(16)
/* NVIC registers */
#define NVIC_ICTR 0xE000E004
#define NVIC_ISE0 0xE000E100