libc/kernel/arch-arm/asm/locks.h

/****************************************************************************
 ****************************************************************************
 ***
 ***   This header was automatically generated from a Linux kernel header
 ***   of the same name, to make information necessary for userspace to
 ***   call into the kernel available to libc.  It contains only constants,
 ***   structures, and macros generated from the original header, and thus,
 ***   contains no copyrightable information.
 ***
 ****************************************************************************
 ****************************************************************************/
#ifndef __ASM_PROC_LOCKS_H
#define __ASM_PROC_LOCKS_H

#if __LINUX_ARM_ARCH__ >= 6

#define __down_op(ptr,fail)   ({   __asm__ __volatile__(   "@ down_op\n"  "1:	ldrex	lr, [%0]\n"  "	sub	lr, lr, %1\n"  "	strex	ip, lr, [%0]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	teq	lr, #0\n"  "	movmi	ip, %0\n"  "	blmi	" #fail   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   smp_mb();   })

#define __down_op_ret(ptr,fail)   ({   unsigned int ret;   __asm__ __volatile__(   "@ down_op_ret\n"  "1:	ldrex	lr, [%1]\n"  "	sub	lr, lr, %2\n"  "	strex	ip, lr, [%1]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	teq	lr, #0\n"  "	movmi	ip, %1\n"  "	movpl	ip, #0\n"  "	blmi	" #fail "\n"  "	mov	%0, ip"   : "=&r" (ret)   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   smp_mb();   ret;   })

#define __up_op(ptr,wake)   ({   smp_mb();   __asm__ __volatile__(   "@ up_op\n"  "1:	ldrex	lr, [%0]\n"  "	add	lr, lr, %1\n"  "	strex	ip, lr, [%0]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	cmp	lr, #0\n"  "	movle	ip, %0\n"  "	blle	" #wake   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   })

#define RW_LOCK_BIAS 0x01000000
#define RW_LOCK_BIAS_STR "0x01000000"

#define __down_op_write(ptr,fail)   ({   __asm__ __volatile__(   "@ down_op_write\n"  "1:	ldrex	lr, [%0]\n"  "	sub	lr, lr, %1\n"  "	strex	ip, lr, [%0]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	teq	lr, #0\n"  "	movne	ip, %0\n"  "	blne	" #fail   :   : "r" (ptr), "I" (RW_LOCK_BIAS)   : "ip", "lr", "cc");   smp_mb();   })

#define __up_op_write(ptr,wake)   ({   smp_mb();   __asm__ __volatile__(   "@ up_op_write\n"  "1:	ldrex	lr, [%0]\n"  "	adds	lr, lr, %1\n"  "	strex	ip, lr, [%0]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	movcs	ip, %0\n"  "	blcs	" #wake   :   : "r" (ptr), "I" (RW_LOCK_BIAS)   : "ip", "lr", "cc");   })

#define __down_op_read(ptr,fail)   __down_op(ptr, fail)

#define __up_op_read(ptr,wake)   ({   smp_mb();   __asm__ __volatile__(   "@ up_op_read\n"  "1:	ldrex	lr, [%0]\n"  "	add	lr, lr, %1\n"  "	strex	ip, lr, [%0]\n"  "	teq	ip, #0\n"  "	bne	1b\n"  "	teq	lr, #0\n"  "	moveq	ip, %0\n"  "	bleq	" #wake   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   })

#else

#define __down_op(ptr,fail)   ({   __asm__ __volatile__(   "@ down_op\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%0]\n"  "	subs	lr, lr, %1\n"  "	str	lr, [%0]\n"  "	msr	cpsr_c, ip\n"  "	movmi	ip, %0\n"  "	blmi	" #fail   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   smp_mb();   })

#define __down_op_ret(ptr,fail)   ({   unsigned int ret;   __asm__ __volatile__(   "@ down_op_ret\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%1]\n"  "	subs	lr, lr, %2\n"  "	str	lr, [%1]\n"  "	msr	cpsr_c, ip\n"  "	movmi	ip, %1\n"  "	movpl	ip, #0\n"  "	blmi	" #fail "\n"  "	mov	%0, ip"   : "=&r" (ret)   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   smp_mb();   ret;   })

#define __up_op(ptr,wake)   ({   smp_mb();   __asm__ __volatile__(   "@ up_op\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%0]\n"  "	adds	lr, lr, %1\n"  "	str	lr, [%0]\n"  "	msr	cpsr_c, ip\n"  "	movle	ip, %0\n"  "	blle	" #wake   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   })

#define RW_LOCK_BIAS 0x01000000
#define RW_LOCK_BIAS_STR "0x01000000"

#define __down_op_write(ptr,fail)   ({   __asm__ __volatile__(   "@ down_op_write\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%0]\n"  "	subs	lr, lr, %1\n"  "	str	lr, [%0]\n"  "	msr	cpsr_c, ip\n"  "	movne	ip, %0\n"  "	blne	" #fail   :   : "r" (ptr), "I" (RW_LOCK_BIAS)   : "ip", "lr", "cc");   smp_mb();   })

#define __up_op_write(ptr,wake)   ({   __asm__ __volatile__(   "@ up_op_write\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%0]\n"  "	adds	lr, lr, %1\n"  "	str	lr, [%0]\n"  "	msr	cpsr_c, ip\n"  "	movcs	ip, %0\n"  "	blcs	" #wake   :   : "r" (ptr), "I" (RW_LOCK_BIAS)   : "ip", "lr", "cc");   smp_mb();   })

#define __down_op_read(ptr,fail)   __down_op(ptr, fail)

#define __up_op_read(ptr,wake)   ({   smp_mb();   __asm__ __volatile__(   "@ up_op_read\n"  "	mrs	ip, cpsr\n"  "	orr	lr, ip, #128\n"  "	msr	cpsr_c, lr\n"  "	ldr	lr, [%0]\n"  "	adds	lr, lr, %1\n"  "	str	lr, [%0]\n"  "	msr	cpsr_c, ip\n"  "	moveq	ip, %0\n"  "	bleq	" #wake   :   : "r" (ptr), "I" (1)   : "ip", "lr", "cc");   })

#endif

#endif