hwcap.h

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_HWCAP_H
#define __ASM_HWCAP_H

#include <uapi/asm/hwcap.h>
#include <asm/cpufeature.h>

#define COMPAT_HWCAP_HALF	(1 << 1)
#define COMPAT_HWCAP_THUMB	(1 << 2)
#define COMPAT_HWCAP_FAST_MULT	(1 << 4)
#define COMPAT_HWCAP_VFP	(1 << 6)
#define COMPAT_HWCAP_EDSP	(1 << 7)
#define COMPAT_HWCAP_NEON	(1 << 12)
#define COMPAT_HWCAP_VFPv3	(1 << 13)
#define COMPAT_HWCAP_TLS	(1 << 15)
#define COMPAT_HWCAP_VFPv4	(1 << 16)
#define COMPAT_HWCAP_IDIVA	(1 << 17)
#define COMPAT_HWCAP_IDIVT	(1 << 18)
#define COMPAT_HWCAP_IDIV	(COMPAT_HWCAP_IDIVA|COMPAT_HWCAP_IDIVT)
#define COMPAT_HWCAP_LPAE	(1 << 20)
#define COMPAT_HWCAP_EVTSTRM	(1 << 21)

#define COMPAT_HWCAP2_AES	(1 << 0)
#define COMPAT_HWCAP2_PMULL	(1 << 1)
#define COMPAT_HWCAP2_SHA1	(1 << 2)
#define COMPAT_HWCAP2_SHA2	(1 << 3)
#define COMPAT_HWCAP2_CRC32	(1 << 4)

#ifndef __ASSEMBLY__
#include <linux/log2.h>

/*
 * For userspace we represent hwcaps as a collection of HWCAP{,2}_x bitfields
 * as described in uapi/asm/hwcap.h. For the kernel we represent hwcaps as
 * natural numbers (in a single range of size MAX_CPU_FEATURES) defined here
 * with prefix KERNEL_HWCAP_ mapped to their HWCAP{,2}_x counterpart.
 *
 * Hwcaps should be set and tested within the kernel via the
 * cpu_{set,have}_named_feature(feature) where feature is the unique suffix
 * of KERNEL_HWCAP_{feature}.
 */
#define __khwcap_feature(x)		const_ilog2(HWCAP_ ## x)
#define KERNEL_HWCAP_FP			__khwcap_feature(FP)
#define KERNEL_HWCAP_ASIMD		__khwcap_feature(ASIMD)
#define KERNEL_HWCAP_EVTSTRM		__khwcap_feature(EVTSTRM)
#define KERNEL_HWCAP_AES		__khwcap_feature(AES)
#define KERNEL_HWCAP_PMULL		__khwcap_feature(PMULL)
#define KERNEL_HWCAP_SHA1		__khwcap_feature(SHA1)
#define KERNEL_HWCAP_SHA2		__khwcap_feature(SHA2)
#define KERNEL_HWCAP_CRC32		__khwcap_feature(CRC32)
#define KERNEL_HWCAP_ATOMICS		__khwcap_feature(ATOMICS)
#define KERNEL_HWCAP_FPHP		__khwcap_feature(FPHP)
#define KERNEL_HWCAP_ASIMDHP		__khwcap_feature(ASIMDHP)
#define KERNEL_HWCAP_CPUID		__khwcap_feature(CPUID)
#define KERNEL_HWCAP_ASIMDRDM		__khwcap_feature(ASIMDRDM)
#define KERNEL_HWCAP_JSCVT		__khwcap_feature(JSCVT)
#define KERNEL_HWCAP_FCMA		__khwcap_feature(FCMA)
#define KERNEL_HWCAP_LRCPC		__khwcap_feature(LRCPC)
#define KERNEL_HWCAP_DCPOP		__khwcap_feature(DCPOP)
#define KERNEL_HWCAP_SHA3		__khwcap_feature(SHA3)
#define KERNEL_HWCAP_SM3		__khwcap_feature(SM3)
#define KERNEL_HWCAP_SM4		__khwcap_feature(SM4)
#define KERNEL_HWCAP_ASIMDDP		__khwcap_feature(ASIMDDP)
#define KERNEL_HWCAP_SHA512		__khwcap_feature(SHA512)
#define KERNEL_HWCAP_SVE		__khwcap_feature(SVE)
#define KERNEL_HWCAP_ASIMDFHM		__khwcap_feature(ASIMDFHM)
#define KERNEL_HWCAP_DIT		__khwcap_feature(DIT)
#define KERNEL_HWCAP_USCAT		__khwcap_feature(USCAT)
#define KERNEL_HWCAP_ILRCPC		__khwcap_feature(ILRCPC)
#define KERNEL_HWCAP_FLAGM		__khwcap_feature(FLAGM)
#define KERNEL_HWCAP_SSBS		__khwcap_feature(SSBS)
#define KERNEL_HWCAP_SB			__khwcap_feature(SB)
#define KERNEL_HWCAP_PACA		__khwcap_feature(PACA)
#define KERNEL_HWCAP_PACG		__khwcap_feature(PACG)

#define __khwcap2_feature(x)		(const_ilog2(HWCAP2_ ## x) + 32)

/*
 * This yields a mask that user programs can use to figure out what
 * instruction set this cpu supports.
 */
#define ELF_HWCAP		cpu_get_elf_hwcap()
#define ELF_HWCAP2		cpu_get_elf_hwcap2()

#ifdef CONFIG_COMPAT
#define COMPAT_ELF_HWCAP	(compat_elf_hwcap)
#define COMPAT_ELF_HWCAP2	(compat_elf_hwcap2)
extern unsigned int compat_elf_hwcap, compat_elf_hwcap2;
#endif

enum {
	CAP_HWCAP = 1,
#ifdef CONFIG_COMPAT
	CAP_COMPAT_HWCAP,
	CAP_COMPAT_HWCAP2,
#endif
};

#endif
#endif