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armv8m: Add support for msplim/psplim for targets with no secext

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When armv8m does not have security extension, it still has
msplim/psplim regs implemented, which is described in Cortex-M33
Devices Generic User Guide.
Document ID: 100235_0100_06_en, or at the link:
https://developer.arm.com/documentation/100235/latest/
Tested on cyw20829 along with gdb v14.2.1

Change-Id: I4f060e4df742c6773e79ce0481697361202d544c
Signed-off-by: kryvosheiaivan <Ivan.Kryvosheia@infineon.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8887
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
kryvosheiaivan
2025-06-26 19:20:39 +03:00
committed by Antonio Borneo
parent a482b78941
commit 1ee0499cd8
4 changed files with 72 additions and 4 deletions
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src/target/armv7m.c
+9
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@@ -139,6 +139,9 @@ static const struct {
{ ARMV7M_FAULTMASK, "faultmask", 1, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system", NULL, },
{ ARMV7M_CONTROL, "control", 3, REG_TYPE_INT8, "system", "org.gnu.gdb.arm.m-system", NULL, },
{ ARMV8M_MSPLIM, "msplim", 32, REG_TYPE_DATA_PTR, "stack", "org.gnu.gdb.arm.m-system", NULL, },
{ ARMV8M_PSPLIM, "psplim", 32, REG_TYPE_DATA_PTR, "stack", "org.gnu.gdb.arm.m-system", NULL, },
/* ARMv8-M security extension (TrustZone) specific registers */
{ ARMV8M_MSP_NS, "msp_ns", 32, REG_TYPE_DATA_PTR, "stack", "org.gnu.gdb.arm.secext", NULL, },
{ ARMV8M_PSP_NS, "psp_ns", 32, REG_TYPE_DATA_PTR, "stack", "org.gnu.gdb.arm.secext", NULL, },
@@ -288,6 +291,12 @@ uint32_t armv7m_map_id_to_regsel(unsigned int arm_reg_id)
case ARMV8M_MSP_NS...ARMV8M_PSPLIM_NS:
return arm_reg_id - ARMV8M_MSP_NS + ARMV8M_REGSEL_MSP_NS;
case ARMV8M_PSPLIM:
return ARMV8M_REGSEL_PSPLIM;
case ARMV8M_MSPLIM:
return ARMV8M_REGSEL_MSPLIM;
case ARMV8M_PMSK_BPRI_FLTMSK_CTRL_S:
return ARMV8M_REGSEL_PMSK_BPRI_FLTMSK_CTRL_S;