Module Name: src
Committed By: matt
Date: Wed Dec 5 19:30:10 UTC 2012
Modified Files:
src/sys/arch/arm/vfp: vfp_init.c
Log Message:
For armv7 (cortex), disable access to the upper 16 FP registers (restrict
the register space to 16 64-bit FP registers).
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/arch/arm/vfp/vfp_init.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/vfp/vfp_init.c
diff -u src/sys/arch/arm/vfp/vfp_init.c:1.8 src/sys/arch/arm/vfp/vfp_init.c:1.9
--- src/sys/arch/arm/vfp/vfp_init.c:1.8 Wed Dec 5 19:05:46 2012
+++ src/sys/arch/arm/vfp/vfp_init.c Wed Dec 5 19:30:10 2012
@@ -1,4 +1,4 @@
-/* $NetBSD: vfp_init.c,v 1.8 2012/12/05 19:05:46 matt Exp $ */
+/* $NetBSD: vfp_init.c,v 1.9 2012/12/05 19:30:10 matt Exp $ */
/*
* Copyright (c) 2008 ARM Ltd
@@ -231,6 +231,12 @@ vfp_attach(void)
uint32_t cpacr = armreg_cpacr_read();
cpacr |= __SHIFTIN(CPACR_ALL, cpacr_vfp);
cpacr |= __SHIFTIN(CPACR_ALL, cpacr_vfp2);
+ if (CPU_ID_CORTEX_P(curcpu()->ci_arm_cpuid)) {
+ /*
+ * Disable access to the upper 16 FP registers.
+ */
+ cpacr |= CPACR_V7_D32DIS;
+ }
armreg_cpacr_write(cpacr);
/*
