ci(hal/tee): Fix intermittent hang-ups in PERI_APM tests on ESP32-C5

Author: laukik-hase

components/hal/test_apps/tee/components/pms_and_cpu_intr/src/cpu_intr/test_vectors_m.S

@@ -252,7 +252,7 @@ _test_panic_handler:
 
     /* Executing the panic handler */
     li      t0, 0xDEADC0DE
-    csrr    t0, mscratch
+    csrw    mscratch, t0
     mv      a0, sp
     csrr    a1, mcause
     li      t0, VECTORS_MCAUSE_REASON_MASK

components/hal/test_apps/tee/components/pms_and_cpu_intr/src/pms/test_tee_peri_apm.c

@@ -76,35 +76,29 @@ static const uint32_t test_peri_apm_lp_peri_reg[] = {
                                         BIT64(APM_TEE_LP_PERIPH_LP_PERI)      | \
                                         BIT64(APM_TEE_LP_PERIPH_LP_APM))
 
-IRAM_ATTR static uint32_t reg_read(uint32_t addr)
+FORCE_INLINE_ATTR uint32_t reg_read(uint32_t addr)
 {
-    uint32_t val;
-    asm volatile (
-        "li t0, 0x100\n"
-        "lw %0, 0(%1)\n"
-        "1:\n"
-        "nop\n"
-        "addi t0, t0, -1\n"
-        "bnez t0, 1b\n"
-        : "=r"(val)
+    uint32_t value;
+    __asm__ volatile (
+        "lw   %0, 0(%1)\n"
+        "fence\n"
+        "nop\nnop\nnop\nnop\n"
+        : "=r"(value)
         : "r"(addr)
-        : "t0", "memory"
+        : "memory"
     );
-    return val;
+    return value;
 }
 
-IRAM_ATTR static void reg_write(uint32_t addr, uint32_t value)
+FORCE_INLINE_ATTR void reg_write(uint32_t addr, uint32_t value)
 {
-    asm volatile (
-        "li t0, 0x100\n"
-        "sw %1, 0(%0)\n"
-        "1:\n"
-        "nop\n"
-        "addi t0, t0, -1\n"
-        "bnez t0, 1b\n"
+    __asm__ volatile (
+        "sw   %1, 0(%0)\n"
+        "fence\n"
+        "nop\nnop\nnop\nnop\n"
         :
         : "r"(addr), "r"(value)
-        : "t0", "memory"
+        : "memory"
     );
 }
 

components/hal/test_apps/tee/pytest_pms_and_cpu_intr.py

@@ -58,4 +58,4 @@ def test_tee_peri_apm(dut: IdfDut) -> None:
     indirect=['config', 'target'],
 )
 def test_tee_interrupts(dut: IdfDut) -> None:
-    dut.run_all_single_board_cases()
+    dut.run_all_single_board_cases(group='CPU')