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Subject[PATCH 2/5] MIPS: OCTEON: crypto: add instruction definitions for MD5
Date
Add instruction definitions for MD5. Based on information extracted
from EdgeRouter Pro GPL source tarball.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
---
arch/mips/cavium-octeon/crypto/octeon-crypto.h | 56 ++++++++++++++++++++++++++
1 file changed, 56 insertions(+)

diff --git a/arch/mips/cavium-octeon/crypto/octeon-crypto.h b/arch/mips/cavium-octeon/crypto/octeon-crypto.h
index 5ca86d4..3f65bc6 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 */
--
2.2.0


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