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10#include <linux/hardirq.h>
11#include <asm-generic/xor.h>
12#include <asm/hwcap.h>
13#include <asm/neon.h>
14
15#define __XOR(a1, a2) a1 ^= a2
16
17#define GET_BLOCK_2(dst) \
18 __asm__("ldmia %0, {%1, %2}" \
19 : "=r" (dst), "=r" (a1), "=r" (a2) \
20 : "0" (dst))
21
22#define GET_BLOCK_4(dst) \
23 __asm__("ldmia %0, {%1, %2, %3, %4}" \
24 : "=r" (dst), "=r" (a1), "=r" (a2), "=r" (a3), "=r" (a4) \
25 : "0" (dst))
26
27#define XOR_BLOCK_2(src) \
28 __asm__("ldmia %0!, {%1, %2}" \
29 : "=r" (src), "=r" (b1), "=r" (b2) \
30 : "0" (src)); \
31 __XOR(a1, b1); __XOR(a2, b2);
32
33#define XOR_BLOCK_4(src) \
34 __asm__("ldmia %0!, {%1, %2, %3, %4}" \
35 : "=r" (src), "=r" (b1), "=r" (b2), "=r" (b3), "=r" (b4) \
36 : "0" (src)); \
37 __XOR(a1, b1); __XOR(a2, b2); __XOR(a3, b3); __XOR(a4, b4)
38
39#define PUT_BLOCK_2(dst) \
40 __asm__ __volatile__("stmia %0!, {%2, %3}" \
41 : "=r" (dst) \
42 : "0" (dst), "r" (a1), "r" (a2))
43
44#define PUT_BLOCK_4(dst) \
45 __asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}" \
46 : "=r" (dst) \
47 : "0" (dst), "r" (a1), "r" (a2), "r" (a3), "r" (a4))
48
49static void
50xor_arm4regs_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
51{
52 unsigned int lines = bytes / sizeof(unsigned long) / 4;
53 register unsigned int a1 __asm__("r4");
54 register unsigned int a2 __asm__("r5");
55 register unsigned int a3 __asm__("r6");
56 register unsigned int a4 __asm__("r7");
57 register unsigned int b1 __asm__("r8");
58 register unsigned int b2 __asm__("r9");
59 register unsigned int b3 __asm__("ip");
60 register unsigned int b4 __asm__("lr");
61
62 do {
63 GET_BLOCK_4(p1);
64 XOR_BLOCK_4(p2);
65 PUT_BLOCK_4(p1);
66 } while (--lines);
67}
68
69static void
70xor_arm4regs_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
71 unsigned long *p3)
72{
73 unsigned int lines = bytes / sizeof(unsigned long) / 4;
74 register unsigned int a1 __asm__("r4");
75 register unsigned int a2 __asm__("r5");
76 register unsigned int a3 __asm__("r6");
77 register unsigned int a4 __asm__("r7");
78 register unsigned int b1 __asm__("r8");
79 register unsigned int b2 __asm__("r9");
80 register unsigned int b3 __asm__("ip");
81 register unsigned int b4 __asm__("lr");
82
83 do {
84 GET_BLOCK_4(p1);
85 XOR_BLOCK_4(p2);
86 XOR_BLOCK_4(p3);
87 PUT_BLOCK_4(p1);
88 } while (--lines);
89}
90
91static void
92xor_arm4regs_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
93 unsigned long *p3, unsigned long *p4)
94{
95 unsigned int lines = bytes / sizeof(unsigned long) / 2;
96 register unsigned int a1 __asm__("r8");
97 register unsigned int a2 __asm__("r9");
98 register unsigned int b1 __asm__("ip");
99 register unsigned int b2 __asm__("lr");
100
101 do {
102 GET_BLOCK_2(p1);
103 XOR_BLOCK_2(p2);
104 XOR_BLOCK_2(p3);
105 XOR_BLOCK_2(p4);
106 PUT_BLOCK_2(p1);
107 } while (--lines);
108}
109
110static void
111xor_arm4regs_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
112 unsigned long *p3, unsigned long *p4, unsigned long *p5)
113{
114 unsigned int lines = bytes / sizeof(unsigned long) / 2;
115 register unsigned int a1 __asm__("r8");
116 register unsigned int a2 __asm__("r9");
117 register unsigned int b1 __asm__("ip");
118 register unsigned int b2 __asm__("lr");
119
120 do {
121 GET_BLOCK_2(p1);
122 XOR_BLOCK_2(p2);
123 XOR_BLOCK_2(p3);
124 XOR_BLOCK_2(p4);
125 XOR_BLOCK_2(p5);
126 PUT_BLOCK_2(p1);
127 } while (--lines);
128}
129
130static struct xor_block_template xor_block_arm4regs = {
131 .name = "arm4regs",
132 .do_2 = xor_arm4regs_2,
133 .do_3 = xor_arm4regs_3,
134 .do_4 = xor_arm4regs_4,
135 .do_5 = xor_arm4regs_5,
136};
137
138#undef XOR_TRY_TEMPLATES
139#define XOR_TRY_TEMPLATES \
140 do { \
141 xor_speed(&xor_block_arm4regs); \
142 xor_speed(&xor_block_8regs); \
143 xor_speed(&xor_block_32regs); \
144 NEON_TEMPLATES; \
145 } while (0)
146
147#ifdef CONFIG_KERNEL_MODE_NEON
148
149extern struct xor_block_template const xor_block_neon_inner;
150
151static void
152xor_neon_2(unsigned long bytes, unsigned long *p1, unsigned long *p2)
153{
154 if (in_interrupt()) {
155 xor_arm4regs_2(bytes, p1, p2);
156 } else {
157 kernel_neon_begin();
158 xor_block_neon_inner.do_2(bytes, p1, p2);
159 kernel_neon_end();
160 }
161}
162
163static void
164xor_neon_3(unsigned long bytes, unsigned long *p1, unsigned long *p2,
165 unsigned long *p3)
166{
167 if (in_interrupt()) {
168 xor_arm4regs_3(bytes, p1, p2, p3);
169 } else {
170 kernel_neon_begin();
171 xor_block_neon_inner.do_3(bytes, p1, p2, p3);
172 kernel_neon_end();
173 }
174}
175
176static void
177xor_neon_4(unsigned long bytes, unsigned long *p1, unsigned long *p2,
178 unsigned long *p3, unsigned long *p4)
179{
180 if (in_interrupt()) {
181 xor_arm4regs_4(bytes, p1, p2, p3, p4);
182 } else {
183 kernel_neon_begin();
184 xor_block_neon_inner.do_4(bytes, p1, p2, p3, p4);
185 kernel_neon_end();
186 }
187}
188
189static void
190xor_neon_5(unsigned long bytes, unsigned long *p1, unsigned long *p2,
191 unsigned long *p3, unsigned long *p4, unsigned long *p5)
192{
193 if (in_interrupt()) {
194 xor_arm4regs_5(bytes, p1, p2, p3, p4, p5);
195 } else {
196 kernel_neon_begin();
197 xor_block_neon_inner.do_5(bytes, p1, p2, p3, p4, p5);
198 kernel_neon_end();
199 }
200}
201
202static struct xor_block_template xor_block_neon = {
203 .name = "neon",
204 .do_2 = xor_neon_2,
205 .do_3 = xor_neon_3,
206 .do_4 = xor_neon_4,
207 .do_5 = xor_neon_5
208};
209
210#define NEON_TEMPLATES \
211 do { if (cpu_has_neon()) xor_speed(&xor_block_neon); } while (0)
212#else
213#define NEON_TEMPLATES
214#endif
215
