crypto: octeon - add instruction definitions for MD5

Add instruction definitions for MD5. Based on information extracted
from EdgeRouter Pro GPL source tarball.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/mips/cavium-octeon/crypto/octeon-crypto.h b/arch/mips/cavium-octeon/crypto/octeon-crypto.h
index 5ca86d4ead52..3f65bc6ccb83 100644
--- a/arch/mips/cavium-octeon/crypto/octeon-crypto.h
+++ b/arch/mips/cavium-octeon/crypto/octeon-crypto.h
@@ -4,14 +4,70 @@
  * for more details.
  *
  * Copyright (C) 2012-2013 Cavium Inc., All Rights Reserved.
+ *
+ * MD5 instruction definitions added by Aaro Koskinen <aaro.koskinen@iki.fi>.
+ *
  */
 #ifndef __LINUX_OCTEON_CRYPTO_H
 #define __LINUX_OCTEON_CRYPTO_H
 
 #include <linux/sched.h>
+#include <asm/mipsregs.h>
 
 extern unsigned long octeon_crypto_enable(struct octeon_cop2_state *state);
 extern void octeon_crypto_disable(struct octeon_cop2_state *state,
                                   unsigned long flags);
 
+/*
+ * Macros needed to implement MD5:
+ */
+
+/*
+ * The index can be 0-1.
+ */
+#define write_octeon_64bit_hash_dword(value, index)     \
+do {                                                    \
+        __asm__ __volatile__ (                          \
+        "dmtc2 %[rt],0x0048+" STR(index)                \
+        :                                               \
+        : [rt] "d" (value));                            \
+} while (0)
+
+/*
+ * The index can be 0-1.
+ */
+#define read_octeon_64bit_hash_dword(index)             \
+({                                                      \
+        u64 __value;                                    \
+                                                        \
+        __asm__ __volatile__ (                          \
+        "dmfc2 %[rt],0x0048+" STR(index)                \
+        : [rt] "=d" (__value)                           \
+        : );                                            \
+                                                        \
+        __value;                                        \
+})
+
+/*
+ * The index can be 0-6.
+ */
+#define write_octeon_64bit_block_dword(value, index)    \
+do {                                                    \
+        __asm__ __volatile__ (                          \
+        "dmtc2 %[rt],0x0040+" STR(index)                \
+        :                                               \
+        : [rt] "d" (value));                            \
+} while (0)
+
+/*
+ * The value is the final block dword (64-bit).
+ */
+#define octeon_md5_start(value)                         \
+do {                                                    \
+        __asm__ __volatile__ (                          \
+        "dmtc2 %[rt],0x4047"                            \
+        :                                               \
+        : [rt] "d" (value));                            \
+} while (0)
+
 #endif /* __LINUX_OCTEON_CRYPTO_H */