1 files changed, 110 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/futex_64.h b/arch/sparc/include/asm/futex_64.h
new file mode 100644
index 000000000000..d8378935ae90
--- /dev/null
+++ b/arch/sparc/include/asm/futex_64.h
@@ -0,0 +1,110 @@
+#ifndef _SPARC64_FUTEX_H
+#define _SPARC64_FUTEX_H
+#include <linux/futex.h>
+#include <linux/uaccess.h>
+#include <asm/errno.h>
+#include <asm/system.h>
+#define __futex_cas_op(insn, ret, oldval, uaddr, oparg) \
+        __asm__ __volatile__(                           \
+        "\n1:   lduwa   [%3] %%asi, %2\n"               \
+        "       " insn "\n"                             \
+        "2:     casa    [%3] %%asi, %2, %1\n"           \
+        "       cmp     %2, %1\n"                       \
+        "       bne,pn  %%icc, 1b\n"                    \
+        "        mov    0, %0\n"                        \
+        "3:\n"                                          \
+        "       .section .fixup,#alloc,#execinstr\n"    \
+        "       .align  4\n"                            \
+        "4:     sethi   %%hi(3b), %0\n"                 \
+        "       jmpl    %0 + %%lo(3b), %%g0\n"          \
+        "        mov    %5, %0\n"                       \
+        "       .previous\n"                            \
+        "       .section __ex_table,\"a\"\n"            \
+        "       .align  4\n"                            \
+        "       .word   1b, 4b\n"                       \
+        "       .word   2b, 4b\n"                       \
+        "       .previous\n"                            \
+        : "=&r" (ret), "=&r" (oldval), "=&r" (tem)      \
+        : "r" (uaddr), "r" (oparg), "i" (-EFAULT)       \
+        : "memory")
+static inline int futex_atomic_op_inuser(int encoded_op, int __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, tem;
+        if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(int))))
+                return -EFAULT;
+        if (unlikely((((unsigned long) uaddr) & 0x3UL)))
+                return -EINVAL;
+        if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
+                oparg = 1 << oparg;
+        pagefault_disable();
+        switch (op) {
+        case FUTEX_OP_SET:
+                __futex_cas_op("mov\t%4, %1", ret, oldval, uaddr, oparg);
+                break;
+        case FUTEX_OP_ADD:
+                __futex_cas_op("add\t%2, %4, %1", ret, oldval, uaddr, oparg);
+                break;
+        case FUTEX_OP_OR:
+                __futex_cas_op("or\t%2, %4, %1", ret, oldval, uaddr, oparg);
+                break;
+        case FUTEX_OP_ANDN:
+                __futex_cas_op("and\t%2, %4, %1", ret, oldval, uaddr, oparg);
+                break;
+        case FUTEX_OP_XOR:
+                __futex_cas_op("xor\t%2, %4, %1", 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(int __user *uaddr, int oldval, int newval)
+{
+        __asm__ __volatile__(
+        "\n1:   casa    [%3] %%asi, %2, %0\n"
+        "2:\n"
+        "       .section .fixup,#alloc,#execinstr\n"
+        "       .align  4\n"
+        "3:     sethi   %%hi(2b), %0\n"
+        "       jmpl    %0 + %%lo(2b), %%g0\n"
+        "        mov    %4, %0\n"
+        "       .previous\n"
+        "       .section __ex_table,\"a\"\n"
+        "       .align  4\n"
+        "       .word   1b, 3b\n"
+        "       .previous\n"
+        : "=r" (newval)
+        : "0" (newval), "r" (oldval), "r" (uaddr), "i" (-EFAULT)
+        : "memory");
+        return newval;
+}
+#endif /* !(_SPARC64_FUTEX_H) */

diff --git a/arch/sparc/include/asm/futex_64.h b/arch/sparc/include/asm/futex_64.h new file mode 100644 index 000000000000..d8378935ae90 --- /dev/null +++ b/arch/sparc/include/asm/futex_64.h
@@ -0,0 +1,110 @@
	1	#ifndef _SPARC64_FUTEX_H
	2	#define _SPARC64_FUTEX_H
	3
	4	#include <linux/futex.h>
	5	#include <linux/uaccess.h>
	6	#include <asm/errno.h>
	7	#include <asm/system.h>
	8
	9	#define __futex_cas_op(insn, ret, oldval, uaddr, oparg) \
	10	__asm__ __volatile__( \
	11	"\n1: lduwa [%3] %%asi, %2\n" \
	12	" " insn "\n" \
	13	"2: casa [%3] %%asi, %2, %1\n" \
	14	" cmp %2, %1\n" \
	15	" bne,pn %%icc, 1b\n" \
	16	" mov 0, %0\n" \
	17	"3:\n" \
	18	" .section .fixup,#alloc,#execinstr\n" \
	19	" .align 4\n" \
	20	"4: sethi %%hi(3b), %0\n" \
	21	" jmpl %0 + %%lo(3b), %%g0\n" \
	22	" mov %5, %0\n" \
	23	" .previous\n" \
	24	" .section __ex_table,\"a\"\n" \
	25	" .align 4\n" \
	26	" .word 1b, 4b\n" \
	27	" .word 2b, 4b\n" \
	28	" .previous\n" \
	29	: "=&r" (ret), "=&r" (oldval), "=&r" (tem) \
	30	: "r" (uaddr), "r" (oparg), "i" (-EFAULT) \
	31	: "memory")
	32
	33	static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
	34	{
	35	int op = (encoded_op >> 28) & 7;
	36	int cmp = (encoded_op >> 24) & 15;
	37	int oparg = (encoded_op << 8) >> 20;
	38	int cmparg = (encoded_op << 20) >> 20;
	39	int oldval = 0, ret, tem;
	40
	41	if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(int))))
	42	return -EFAULT;
	43	if (unlikely((((unsigned long) uaddr) & 0x3UL)))
	44	return -EINVAL;
	45
	46	if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
	47	oparg = 1 << oparg;
	48
	49	pagefault_disable();
	50
	51	switch (op) {
	52	case FUTEX_OP_SET:
	53	__futex_cas_op("mov\t%4, %1", ret, oldval, uaddr, oparg);
	54	break;
	55	case FUTEX_OP_ADD:
	56	__futex_cas_op("add\t%2, %4, %1", ret, oldval, uaddr, oparg);
	57	break;
	58	case FUTEX_OP_OR:
	59	__futex_cas_op("or\t%2, %4, %1", ret, oldval, uaddr, oparg);
	60	break;
	61	case FUTEX_OP_ANDN:
	62	__futex_cas_op("and\t%2, %4, %1", ret, oldval, uaddr, oparg);
	63	break;
	64	case FUTEX_OP_XOR:
	65	__futex_cas_op("xor\t%2, %4, %1", ret, oldval, uaddr, oparg);
	66	break;
	67	default:
	68	ret = -ENOSYS;
	69	}
	70
	71	pagefault_enable();
	72
	73	if (!ret) {
	74	switch (cmp) {
	75	case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
	76	case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
	77	case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
	78	case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
	79	case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
	80	case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
	81	default: ret = -ENOSYS;
	82	}
	83	}
	84	return ret;
	85	}
	86
	87	static inline int
	88	futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval)
	89	{
	90	__asm__ __volatile__(
	91	"\n1: casa [%3] %%asi, %2, %0\n"
	92	"2:\n"
	93	" .section .fixup,#alloc,#execinstr\n"
	94	" .align 4\n"
	95	"3: sethi %%hi(2b), %0\n"
	96	" jmpl %0 + %%lo(2b), %%g0\n"
	97	" mov %4, %0\n"
	98	" .previous\n"
	99	" .section __ex_table,\"a\"\n"
	100	" .align 4\n"
	101	" .word 1b, 3b\n"
	102	" .previous\n"
	103	: "=r" (newval)
	104	: "0" (newval), "r" (oldval), "r" (uaddr), "i" (-EFAULT)
	105	: "memory");
	106
	107	return newval;
	108	}
	109
	110	#endif /* !(_SPARC64_FUTEX_H) */