From: Andrew Jones <drjones@xxxxxxxxxx>
Sometimes we need to test access to system registers which are
missing assembler mnemonics.
Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
Reviewed-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
---
lib/arm64/asm/sysreg.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/lib/arm64/asm/sysreg.h b/lib/arm64/asm/sysreg.h
index a03830b..a45eebd 100644
--- a/lib/arm64/asm/sysreg.h
+++ b/lib/arm64/asm/sysreg.h
@@ -38,6 +38,17 @@
asm volatile("msr " xstr(r) ", %x0" : : "rZ" (__val)); \
} while (0)
+#define read_sysreg_s(r) ({ \
+ u64 __val; \
+ asm volatile("mrs_s %0, " xstr(r) : "=r" (__val)); \
+ __val; \
+})
+
+#define write_sysreg_s(v, r) do { \
+ u64 __val = (u64)v; \
+ asm volatile("msr_s " xstr(r) ", %x0" : : "rZ" (__val));\
+} while (0)
+
asm(
" .irp num,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30\n"
" .equ .L__reg_num_x\\num, \\num\n"
--
2.20.1
