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-rw-r--r--arch/alpha/include/asm/barrier.h2
-rw-r--r--arch/alpha/include/asm/futex.h118
-rw-r--r--arch/alpha/include/asm/percpu.h26
-rw-r--r--arch/alpha/include/asm/uaccess.h2
4 files changed, 143 insertions, 5 deletions
diff --git a/arch/alpha/include/asm/barrier.h b/arch/alpha/include/asm/barrier.h
index ac78eba909bc..ce8860a0b32d 100644
--- a/arch/alpha/include/asm/barrier.h
+++ b/arch/alpha/include/asm/barrier.h
@@ -16,11 +16,13 @@ __asm__ __volatile__("wmb": : :"memory")
16__asm__ __volatile__("mb": : :"memory") 16__asm__ __volatile__("mb": : :"memory")
17 17
18#ifdef CONFIG_SMP 18#ifdef CONFIG_SMP
19#define __ASM_SMP_MB "\tmb\n"
19#define smp_mb() mb() 20#define smp_mb() mb()
20#define smp_rmb() rmb() 21#define smp_rmb() rmb()
21#define smp_wmb() wmb() 22#define smp_wmb() wmb()
22#define smp_read_barrier_depends() read_barrier_depends() 23#define smp_read_barrier_depends() read_barrier_depends()
23#else 24#else
25#define __ASM_SMP_MB
24#define smp_mb() barrier() 26#define smp_mb() barrier()
25#define smp_rmb() barrier() 27#define smp_rmb() barrier()
26#define smp_wmb() barrier() 28#define smp_wmb() barrier()
diff --git a/arch/alpha/include/asm/futex.h b/arch/alpha/include/asm/futex.h
index 6a332a9f099c..945de222ab91 100644
--- a/arch/alpha/include/asm/futex.h
+++ b/arch/alpha/include/asm/futex.h
@@ -1,6 +1,116 @@
1#ifndef _ASM_FUTEX_H 1#ifndef _ASM_ALPHA_FUTEX_H
2#define _ASM_FUTEX_H 2#define _ASM_ALPHA_FUTEX_H
3 3
4#include <asm-generic/futex.h> 4#ifdef __KERNEL__
5 5
6#endif 6#include <linux/futex.h>
7#include <linux/uaccess.h>
8#include <asm/errno.h>
9#include <asm/barrier.h>
10
11#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
12 __asm__ __volatile__( \
13 __ASM_SMP_MB \
14 "1: ldl_l %0,0(%2)\n" \
15 insn \
16 "2: stl_c %1,0(%2)\n" \
17 " beq %1,4f\n" \
18 " mov $31,%1\n" \
19 "3: .subsection 2\n" \
20 "4: br 1b\n" \
21 " .previous\n" \
22 " .section __ex_table,\"a\"\n" \
23 " .long 1b-.\n" \
24 " lda $31,3b-1b(%1)\n" \
25 " .long 2b-.\n" \
26 " lda $31,3b-2b(%1)\n" \
27 " .previous\n" \
28 : "=&r" (oldval), "=&r"(ret) \
29 : "r" (uaddr), "r"(oparg) \
30 : "memory")
31
32static inline int futex_atomic_op_inuser (int encoded_op, int __user *uaddr)
33{
34 int op = (encoded_op >> 28) & 7;
35 int cmp = (encoded_op >> 24) & 15;
36 int oparg = (encoded_op << 8) >> 20;
37 int cmparg = (encoded_op << 20) >> 20;
38 int oldval = 0, ret;
39 if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
40 oparg = 1 << oparg;
41
42 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
43 return -EFAULT;
44
45 pagefault_disable();
46
47 switch (op) {
48 case FUTEX_OP_SET:
49 __futex_atomic_op("mov %3,%1\n", ret, oldval, uaddr, oparg);
50 break;
51 case FUTEX_OP_ADD:
52 __futex_atomic_op("addl %0,%3,%1\n", ret, oldval, uaddr, oparg);
53 break;
54 case FUTEX_OP_OR:
55 __futex_atomic_op("or %0,%3,%1\n", ret, oldval, uaddr, oparg);
56 break;
57 case FUTEX_OP_ANDN:
58 __futex_atomic_op("andnot %0,%3,%1\n", ret, oldval, uaddr, oparg);
59 break;
60 case FUTEX_OP_XOR:
61 __futex_atomic_op("xor %0,%3,%1\n", ret, oldval, uaddr, oparg);
62 break;
63 default:
64 ret = -ENOSYS;
65 }
66
67 pagefault_enable();
68
69 if (!ret) {
70 switch (cmp) {
71 case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
72 case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
73 case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
74 case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
75 case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
76 case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
77 default: ret = -ENOSYS;
78 }
79 }
80 return ret;
81}
82
83static inline int
84futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
85{
86 int prev, cmp;
87
88 if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
89 return -EFAULT;
90
91 __asm__ __volatile__ (
92 __ASM_SMP_MB
93 "1: ldl_l %0,0(%2)\n"
94 " cmpeq %0,%3,%1\n"
95 " beq %1,3f\n"
96 " mov %4,%1\n"
97 "2: stl_c %1,0(%2)\n"
98 " beq %1,4f\n"
99 "3: .subsection 2\n"
100 "4: br 1b\n"
101 " .previous\n"
102 " .section __ex_table,\"a\"\n"
103 " .long 1b-.\n"
104 " lda $31,3b-1b(%0)\n"
105 " .long 2b-.\n"
106 " lda $31,3b-2b(%0)\n"
107 " .previous\n"
108 : "=&r"(prev), "=&r"(cmp)
109 : "r"(uaddr), "r"((long)oldval), "r"(newval)
110 : "memory");
111
112 return prev;
113}
114
115#endif /* __KERNEL__ */
116#endif /* _ASM_ALPHA_FUTEX_H */
diff --git a/arch/alpha/include/asm/percpu.h b/arch/alpha/include/asm/percpu.h
index e9e0bb5a23bf..06c5c7a4afd3 100644
--- a/arch/alpha/include/asm/percpu.h
+++ b/arch/alpha/include/asm/percpu.h
@@ -1,7 +1,9 @@
1#ifndef __ALPHA_PERCPU_H 1#ifndef __ALPHA_PERCPU_H
2#define __ALPHA_PERCPU_H 2#define __ALPHA_PERCPU_H
3
3#include <linux/compiler.h> 4#include <linux/compiler.h>
4#include <linux/threads.h> 5#include <linux/threads.h>
6#include <linux/percpu-defs.h>
5 7
6/* 8/*
7 * Determine the real variable name from the name visible in the 9 * Determine the real variable name from the name visible in the
@@ -73,6 +75,28 @@ extern unsigned long __per_cpu_offset[NR_CPUS];
73 75
74#endif /* SMP */ 76#endif /* SMP */
75 77
76#include <asm-generic/percpu.h> 78#ifdef CONFIG_SMP
79#define PER_CPU_BASE_SECTION ".data.percpu"
80#else
81#define PER_CPU_BASE_SECTION ".data"
82#endif
83
84#ifdef CONFIG_SMP
85
86#ifdef MODULE
87#define PER_CPU_SHARED_ALIGNED_SECTION ""
88#else
89#define PER_CPU_SHARED_ALIGNED_SECTION ".shared_aligned"
90#endif
91#define PER_CPU_FIRST_SECTION ".first"
92
93#else
94
95#define PER_CPU_SHARED_ALIGNED_SECTION ""
96#define PER_CPU_FIRST_SECTION ""
97
98#endif
99
100#define PER_CPU_ATTRIBUTES
77 101
78#endif /* __ALPHA_PERCPU_H */ 102#endif /* __ALPHA_PERCPU_H */
diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h
index 163f3053001c..b49ec2f8d6e3 100644
--- a/arch/alpha/include/asm/uaccess.h
+++ b/arch/alpha/include/asm/uaccess.h
@@ -507,5 +507,7 @@ struct exception_table_entry
507 (pc) + (_fixup)->fixup.bits.nextinsn; \ 507 (pc) + (_fixup)->fixup.bits.nextinsn; \
508}) 508})
509 509
510#define ARCH_HAS_SORT_EXTABLE
511#define ARCH_HAS_SEARCH_EXTABLE
510 512
511#endif /* __ALPHA_UACCESS_H */ 513#endif /* __ALPHA_UACCESS_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-08 00:48:00 -0400