[src/trunk]: src/sys/arch/aarch64/aarch64 deal with gas not having icc_sre_el...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7448f4bd5c03
branches:  trunk
changeset: 324725:7448f4bd5c03
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Jul 17 00:33:02 2018 +0000

description:
deal with gas not having icc_sre_el2 (from jmcneill)

diffstat:

 sys/arch/aarch64/aarch64/locore_el2.S |  13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diffs (37 lines):

diff -r e4169d7f649c -r 7448f4bd5c03 sys/arch/aarch64/aarch64/locore_el2.S
--- a/sys/arch/aarch64/aarch64/locore_el2.S     Tue Jul 17 00:32:28 2018 +0000
+++ b/sys/arch/aarch64/aarch64/locore_el2.S     Tue Jul 17 00:33:02 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore_el2.S,v 1.2 2018/07/09 06:10:21 ryo Exp $       */
+/*     $NetBSD: locore_el2.S,v 1.3 2018/07/17 00:33:02 christos Exp $  */
 
 /*-
  * Copyright (c) 2012-2014 Andrew Turner
@@ -32,7 +32,7 @@
 #include <aarch64/hypervisor.h>
 #include "assym.h"
 
-RCSID("$NetBSD: locore_el2.S,v 1.2 2018/07/09 06:10:21 ryo Exp $")
+RCSID("$NetBSD: locore_el2.S,v 1.3 2018/07/17 00:33:02 christos Exp $")
 
 
 /* for use in #include "locore_el2.S" */
@@ -108,11 +108,16 @@
        /* GIC[3:0] == 0001 - GIC CPU interface via special regs. supported */
        cmp     x2, #ID_AA64PFR0_EL1_GIC_CPUIF_EN
        b.ne    2f
+#ifdef __clang__
+#define ICC_SRE_EL2 icc_sre_el2
+#else
+#define ICC_SRE_EL2 S3_4_C12_C9_5
+#endif
 
-       mrs     x2, icc_sre_el2
+       mrs     x2, ICC_SRE_EL2
        orr     x2, x2, #ICC_SRE_EL2_EN /* Enable access from insecure EL1 */
        orr     x2, x2, #ICC_SRE_EL2_SRE        /* Enable system registers */
-       msr     icc_sre_el2, x2
+       msr     ICC_SRE_EL2, x2
 2:
 
        /* keep stack pointer */