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For armv7 (cortex), disable access to the upper 16 FP registers (restrict 

the register space to 16 64-bit FP registers).
This commit is contained in:
matt 2012-12-05 19:30:10 +00:00
parent ec05f9496d
commit c7350ec513
1 changed files with 7 additions and 1 deletions
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8
sys/arch/arm/vfp/vfp_init.c
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@ -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 * Copyright (c) 2008 ARM Ltd
@ -231,6 +231,12 @@ vfp_attach(void)
uint32_t cpacr = armreg_cpacr_read(); uint32_t cpacr = armreg_cpacr_read();
cpacr |= __SHIFTIN(CPACR_ALL, cpacr_vfp); cpacr |= __SHIFTIN(CPACR_ALL, cpacr_vfp);
cpacr |= __SHIFTIN(CPACR_ALL, cpacr_vfp2); 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); armreg_cpacr_write(cpacr);
/* /*