1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ASM_PROC_LOCKS_H 13 #define __ASM_PROC_LOCKS_H 14 15 #if __LINUX_ARM_ARCH__ >= 6 16 17 #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(); }) 18 19 #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; }) 20 21 #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"); }) 22 23 #define RW_LOCK_BIAS 0x01000000 24 #define RW_LOCK_BIAS_STR "0x01000000" 25 26 #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(); }) 27 28 #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"); }) 29 30 #define __down_op_read(ptr,fail) __down_op(ptr, fail) 31 32 #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"); }) 33 34 #else 35 36 #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(); }) 37 38 #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; }) 39 40 #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"); }) 41 42 #define RW_LOCK_BIAS 0x01000000 43 #define RW_LOCK_BIAS_STR "0x01000000" 44 45 #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(); }) 46 47 #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(); }) 48 49 #define __down_op_read(ptr,fail) __down_op(ptr, fail) 50 51 #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"); }) 52 53 #endif 54 55 #endif 56