diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/include/asm/futex.h')
-rw-r--r-- | ANDROID_3.4.5/arch/microblaze/include/asm/futex.h | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/include/asm/futex.h b/ANDROID_3.4.5/arch/microblaze/include/asm/futex.h deleted file mode 100644 index ff8cde15..00000000 --- a/ANDROID_3.4.5/arch/microblaze/include/asm/futex.h +++ /dev/null @@ -1,129 +0,0 @@ -#ifndef _ASM_MICROBLAZE_FUTEX_H -#define _ASM_MICROBLAZE_FUTEX_H - -#ifdef __KERNEL__ - -#include <linux/futex.h> -#include <linux/uaccess.h> -#include <asm/errno.h> - -#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \ -({ \ - __asm__ __volatile__ ( \ - "1: lwx %0, %2, r0; " \ - insn \ - "2: swx %1, %2, r0; \ - addic %1, r0, 0; \ - bnei %1, 1b; \ - 3: \ - .section .fixup,\"ax\"; \ - 4: brid 3b; \ - addik %1, r0, %3; \ - .previous; \ - .section __ex_table,\"a\"; \ - .word 1b,4b,2b,4b; \ - .previous;" \ - : "=&r" (oldval), "=&r" (ret) \ - : "r" (uaddr), "i" (-EFAULT), "r" (oparg) \ - ); \ -}) - -static inline int -futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr) -{ - int op = (encoded_op >> 28) & 7; - int cmp = (encoded_op >> 24) & 15; - int oparg = (encoded_op << 8) >> 20; - int cmparg = (encoded_op << 20) >> 20; - int oldval = 0, ret; - if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) - oparg = 1 << oparg; - - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) - return -EFAULT; - - pagefault_disable(); - - switch (op) { - case FUTEX_OP_SET: - __futex_atomic_op("or %1,%4,%4;", ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_ADD: - __futex_atomic_op("add %1,%0,%4;", ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_OR: - __futex_atomic_op("or %1,%0,%4;", ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_ANDN: - __futex_atomic_op("andn %1,%0,%4;", ret, oldval, uaddr, oparg); - break; - case FUTEX_OP_XOR: - __futex_atomic_op("xor %1,%0,%4;", ret, oldval, uaddr, oparg); - break; - default: - ret = -ENOSYS; - } - - pagefault_enable(); - - if (!ret) { - switch (cmp) { - case FUTEX_OP_CMP_EQ: - ret = (oldval == cmparg); - break; - case FUTEX_OP_CMP_NE: - ret = (oldval != cmparg); - break; - case FUTEX_OP_CMP_LT: - ret = (oldval < cmparg); - break; - case FUTEX_OP_CMP_GE: - ret = (oldval >= cmparg); - break; - case FUTEX_OP_CMP_LE: - ret = (oldval <= cmparg); - break; - case FUTEX_OP_CMP_GT: - ret = (oldval > cmparg); - break; - default: - ret = -ENOSYS; - } - } - return ret; -} - -static inline int -futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, - u32 oldval, u32 newval) -{ - int ret = 0, cmp; - u32 prev; - - if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) - return -EFAULT; - - __asm__ __volatile__ ("1: lwx %1, %3, r0; \ - cmp %2, %1, %4; \ - beqi %2, 3f; \ - 2: swx %5, %3, r0; \ - addic %2, r0, 0; \ - bnei %2, 1b; \ - 3: \ - .section .fixup,\"ax\"; \ - 4: brid 3b; \ - addik %0, r0, %6; \ - .previous; \ - .section __ex_table,\"a\"; \ - .word 1b,4b,2b,4b; \ - .previous;" \ - : "+r" (ret), "=&r" (prev), "=&r"(cmp) \ - : "r" (uaddr), "r" (oldval), "r" (newval), "i" (-EFAULT)); - - *uval = prev; - return ret; -} - -#endif /* __KERNEL__ */ - -#endif |