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[ARM] 5388/1: Add hwcap bits for VFPv3 and VFPv3D16 

The VFPv3D16 is a VFPv3 CPU configuration where only 16 double registers
are present, as the VFPv2 configuration. This patch adds the
corresponding hwcap bits so that applications or debuggers have more
information about the supported features.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas 2009-02-11 13:13:56 +01:00 committed by Russell King
parent 3d1228ead6
commit 7279dc3e91
3 changed files with 16 additions and 0 deletions
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2
arch/arm/include/asm/hwcap.h
View File

@ -17,6 +17,8 @@
#define HWCAP_CRUNCH 1024 #define HWCAP_CRUNCH 1024
#define HWCAP_THUMBEE 2048 #define HWCAP_THUMBEE 2048
#define HWCAP_NEON 4096 #define HWCAP_NEON 4096
#define HWCAP_VFPv3 8192
#define HWCAP_VFPv3D16 16384
#if defined(__KERNEL__) && !defined(__ASSEMBLY__) #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
/* /*

2
arch/arm/kernel/setup.c
View File

@ -779,6 +779,8 @@ static const char *hwcap_str[] = {
"crunch", "crunch",
"thumbee", "thumbee",
"neon", "neon",
"vfpv3",
"vfpv3d16",
NULL NULL
}; };

12
arch/arm/vfp/vfpmodule.c
View File

@ -476,6 +476,18 @@ static int __init vfp_init(void)
* in place; report VFP support to userspace. * in place; report VFP support to userspace.
*/ */
elf_hwcap |= HWCAP_VFP; elf_hwcap |= HWCAP_VFP;
#ifdef CONFIG_VFPv3
if (VFP_arch >= 3) {
elf_hwcap |= HWCAP_VFPv3;
/*
* Check for VFPv3 D16. CPUs in this configuration
* only have 16 x 64bit registers.
*/
if (((fmrx(MVFR0) & MVFR0_A_SIMD_MASK)) == 1)
elf_hwcap |= HWCAP_VFPv3D16;
}
#endif
#ifdef CONFIG_NEON #ifdef CONFIG_NEON
/* /*
* Check for the presence of the Advanced SIMD * Check for the presence of the Advanced SIMD