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9#include <linux/types.h>
10#include <linux/export.h>
11#include <linux/raid/xor.h>
12#include <asm/xor.h>
13
14static void xor_xc_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
15{
16 asm volatile(
17 " larl 1,2f\n"
18 " aghi %0,-1\n"
19 " jm 3f\n"
20 " srlg 0,%0,8\n"
21 " ltgr 0,0\n"
22 " jz 1f\n"
23 "0: xc 0(256,%1),0(%2)\n"
24 " la %1,256(%1)\n"
25 " la %2,256(%2)\n"
26 " brctg 0,0b\n"
27 "1: ex %0,0(1)\n"
28 " j 3f\n"
29 "2: xc 0(1,%1),0(%2)\n"
30 "3:\n"
31 : : "d" (bytes), "a" (p1), "a" (p2)
32 : "0", "1", "cc", "memory");
33}
34
35static void xor_xc_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
36 unsigned long *p3)
37{
38 asm volatile(
39 " larl 1,2f\n"
40 " aghi %0,-1\n"
41 " jm 3f\n"
42 " srlg 0,%0,8\n"
43 " ltgr 0,0\n"
44 " jz 1f\n"
45 "0: xc 0(256,%1),0(%2)\n"
46 " xc 0(256,%1),0(%3)\n"
47 " la %1,256(%1)\n"
48 " la %2,256(%2)\n"
49 " la %3,256(%3)\n"
50 " brctg 0,0b\n"
51 "1: ex %0,0(1)\n"
52 " ex %0,6(1)\n"
53 " j 3f\n"
54 "2: xc 0(1,%1),0(%2)\n"
55 " xc 0(1,%1),0(%3)\n"
56 "3:\n"
57 : "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3)
58 : : "0", "1", "cc", "memory");
59}
60
61static void xor_xc_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
62 unsigned long *p3, unsigned long *p4)
63{
64 asm volatile(
65 " larl 1,2f\n"
66 " aghi %0,-1\n"
67 " jm 3f\n"
68 " srlg 0,%0,8\n"
69 " ltgr 0,0\n"
70 " jz 1f\n"
71 "0: xc 0(256,%1),0(%2)\n"
72 " xc 0(256,%1),0(%3)\n"
73 " xc 0(256,%1),0(%4)\n"
74 " la %1,256(%1)\n"
75 " la %2,256(%2)\n"
76 " la %3,256(%3)\n"
77 " la %4,256(%4)\n"
78 " brctg 0,0b\n"
79 "1: ex %0,0(1)\n"
80 " ex %0,6(1)\n"
81 " ex %0,12(1)\n"
82 " j 3f\n"
83 "2: xc 0(1,%1),0(%2)\n"
84 " xc 0(1,%1),0(%3)\n"
85 " xc 0(1,%1),0(%4)\n"
86 "3:\n"
87 : "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4)
88 : : "0", "1", "cc", "memory");
89}
90
91static void xor_xc_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
92 unsigned long *p3, unsigned long *p4, unsigned long *p5)
93{
94 asm volatile(
95 " larl 1,2f\n"
96 " aghi %0,-1\n"
97 " jm 3f\n"
98 " srlg 0,%0,8\n"
99 " ltgr 0,0\n"
100 " jz 1f\n"
101 "0: xc 0(256,%1),0(%2)\n"
102 " xc 0(256,%1),0(%3)\n"
103 " xc 0(256,%1),0(%4)\n"
104 " xc 0(256,%1),0(%5)\n"
105 " la %1,256(%1)\n"
106 " la %2,256(%2)\n"
107 " la %3,256(%3)\n"
108 " la %4,256(%4)\n"
109 " la %5,256(%5)\n"
110 " brctg 0,0b\n"
111 "1: ex %0,0(1)\n"
112 " ex %0,6(1)\n"
113 " ex %0,12(1)\n"
114 " ex %0,18(1)\n"
115 " j 3f\n"
116 "2: xc 0(1,%1),0(%2)\n"
117 " xc 0(1,%1),0(%3)\n"
118 " xc 0(1,%1),0(%4)\n"
119 " xc 0(1,%1),0(%5)\n"
120 "3:\n"
121 : "+d" (bytes), "+a" (p1), "+a" (p2), "+a" (p3), "+a" (p4),
122 "+a" (p5)
123 : : "0", "1", "cc", "memory");
124}
125
126struct xor_block_template xor_block_xc = {
127 .name = "xc",
128 .do_2 = xor_xc_2,
129 .do_3 = xor_xc_3,
130 .do_4 = xor_xc_4,
131 .do_5 = xor_xc_5,
132};
133EXPORT_SYMBOL(xor_block_xc);
134
