boot/efi/arm: add debug logs for initial CPU state

Change-Id: I08df563ef6967f5f9734bbe11ac643c3b68f504f Reviewed-on: https://review.haiku-os.org/c/haiku/+/5151 Tested-by: Commit checker robot <[email protected]> Reviewed-by: Adrien Destugues <[email protected]>
2022-03-29 07:09:14 +00:00
parent 7fdf6e8639
commit d232643ed8
2 changed files with 70 additions and 0 deletions
@@ -20,6 +20,61 @@ void arch_ucode_load(BootVolume& volume);
 bigtime_t system_time();
 void spin(bigtime_t microseconds);

+
+static inline uint32
+cpu_read_CPSR(void)
+{
+	uint32 res;
+	asm volatile("MRS %0, CPSR": "=r" (res));
+	return res;
+}
+
+
+static inline uint32
+mmu_read_SCTLR(void)
+{
+	uint32 res;
+	asm volatile("MRC p15, 0, %0, c1, c0, 0": "=r" (res));
+	return res;
+}
+
+
+static inline uint32
+mmu_read_TTBR0(void)
+{
+	uint32 res;
+	asm volatile("MRC p15, 0, %0, c2, c0, 0": "=r" (res));
+	return res;
+}
+
+
+static inline uint32
+mmu_read_TTBR1(void)
+{
+	uint32 res;
+	asm volatile("MRC p15, 0, %0, c2, c0, 1": "=r" (res));
+	return res;
+}
+
+
+static inline uint32
+mmu_read_TTBCR(void)
+{
+	uint32 res;
+	asm volatile("MRC p15, 0, %0, c2, c0, 2": "=r" (res));
+	return res;
+}
+
+
+static inline uint32
+mmu_read_DACR(void)
+{
+	uint32 res;
+	asm volatile("MRC p15, 0, %0, c3, c0, 0": "=r" (res));
+	return res;
+}
+
+
 #ifdef __cplusplus
 }
 #endif