Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f27bb139 authored by Marc Zyngier's avatar Marc Zyngier Committed by Catalin Marinas
Browse files

arm64: Miscellaneous library functions 



This patch adds udelay, memory and bit operations together with the
ksyms exports.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Acked-by: default avatarTony Lindgren <tony@atomide.com>
Acked-by: default avatarNicolas Pitre <nico@linaro.org>
Acked-by: default avatarOlof Johansson <olof@lixom.net>
Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
parent 03089688

arch/arm64/include/asm/bitops.h

0 → 100644
+53 −0
Original line number Diff line number Diff line 
/*

 * 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_BITOPS_H

#define __ASM_BITOPS_H



#include <linux/compiler.h>



#include <asm/barrier.h>



/*

 * clear_bit may not imply a memory barrier

 */

#ifndef smp_mb__before_clear_bit

#define smp_mb__before_clear_bit()	smp_mb()

#define smp_mb__after_clear_bit()	smp_mb()

#endif



#ifndef _LINUX_BITOPS_H

#error only <linux/bitops.h> can be included directly

#endif



#include <asm-generic/bitops/builtin-__ffs.h>

#include <asm-generic/bitops/builtin-ffs.h>

#include <asm-generic/bitops/builtin-__fls.h>

#include <asm-generic/bitops/builtin-fls.h>



#include <asm-generic/bitops/ffz.h>

#include <asm-generic/bitops/fls64.h>

#include <asm-generic/bitops/find.h>



#include <asm-generic/bitops/sched.h>

#include <asm-generic/bitops/hweight.h>

#include <asm-generic/bitops/lock.h>



#include <asm-generic/bitops/atomic.h>

#include <asm-generic/bitops/non-atomic.h>

#include <asm-generic/bitops/le.h>

#include <asm-generic/bitops/ext2-atomic.h>



#endif /* __ASM_BITOPS_H */

arch/arm64/include/asm/syscall.h

0 → 100644
+101 −0
Original line number Diff line number Diff line 
/*

 * 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_SYSCALL_H

#define __ASM_SYSCALL_H



#include <linux/err.h>





static inline int syscall_get_nr(struct task_struct *task,

				 struct pt_regs *regs)

{

	return regs->syscallno;

}



static inline void syscall_rollback(struct task_struct *task,

				    struct pt_regs *regs)

{

	regs->regs[0] = regs->orig_x0;

}





static inline long syscall_get_error(struct task_struct *task,

				     struct pt_regs *regs)

{

	unsigned long error = regs->regs[0];

	return IS_ERR_VALUE(error) ? error : 0;

}



static inline long syscall_get_return_value(struct task_struct *task,

					    struct pt_regs *regs)

{

	return regs->regs[0];

}



static inline void syscall_set_return_value(struct task_struct *task,

					    struct pt_regs *regs,

					    int error, long val)

{

	regs->regs[0] = (long) error ? error : val;

}



#define SYSCALL_MAX_ARGS 6



static inline void syscall_get_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 unsigned int i, unsigned int n,

					 unsigned long *args)

{

	if (i + n > SYSCALL_MAX_ARGS) {

		unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i;

		unsigned int n_bad = n + i - SYSCALL_MAX_ARGS;

		pr_warning("%s called with max args %d, handling only %d\n",

			   __func__, i + n, SYSCALL_MAX_ARGS);

		memset(args_bad, 0, n_bad * sizeof(args[0]));

	}



	if (i == 0) {

		args[0] = regs->orig_x0;

		args++;

		i++;

		n--;

	}



	memcpy(args, &regs->regs[i], n * sizeof(args[0]));

}



static inline void syscall_set_arguments(struct task_struct *task,

					 struct pt_regs *regs,

					 unsigned int i, unsigned int n,

					 const unsigned long *args)

{

	if (i + n > SYSCALL_MAX_ARGS) {

		pr_warning("%s called with max args %d, handling only %d\n",

			   __func__, i + n, SYSCALL_MAX_ARGS);

		n = SYSCALL_MAX_ARGS - i;

	}



	if (i == 0) {

		regs->orig_x0 = args[0];

		args++;

		i++;

		n--;

	}



	memcpy(&regs->regs[i], args, n * sizeof(args[0]));

}



#endif	/* __ASM_SYSCALL_H */

arch/arm64/kernel/arm64ksyms.c

0 → 100644
+46 −0
Original line number Diff line number Diff line 
/*

 * Based on arch/arm/kernel/armksyms.c

 *

 * Copyright (C) 2000 Russell King

 * 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/>.

 */



#include <linux/export.h>

#include <linux/sched.h>

#include <linux/string.h>

#include <linux/cryptohash.h>

#include <linux/delay.h>

#include <linux/in6.h>

#include <linux/syscalls.h>

#include <linux/uaccess.h>

#include <linux/io.h>



#include <asm/checksum.h>



	/* user mem (segment) */

EXPORT_SYMBOL(__strnlen_user);

EXPORT_SYMBOL(__strncpy_from_user);



EXPORT_SYMBOL(copy_page);



EXPORT_SYMBOL(__copy_from_user);

EXPORT_SYMBOL(__copy_to_user);

EXPORT_SYMBOL(__clear_user);



	/* bitops */

EXPORT_SYMBOL(__atomic_hash);



	/* physical memory */

EXPORT_SYMBOL(memstart_addr);

arch/arm64/lib/Makefile

0 → 100644
+4 −0
Original line number Diff line number Diff line 
lib-y		:= bitops.o delay.o					\

		   strncpy_from_user.o strnlen_user.o clear_user.o	\

		   copy_from_user.o copy_to_user.o copy_in_user.o	\

		   copy_page.o clear_page.o

arch/arm64/lib/bitops.c

0 → 100644
+25 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2012 ARM Limited

 *

 * 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/>.

 */



#include <linux/kernel.h>

#include <linux/spinlock.h>

#include <linux/atomic.h>



#ifdef CONFIG_SMP

arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned = {

       [0 ... (ATOMIC_HASH_SIZE-1)]  = __ARCH_SPIN_LOCK_UNLOCKED

};

#endif