aes.patch

patches for linux-2.6.

This patch provides support for the Au1200 AES Block.
This patch authored against Linux 2.4.26.

How to use AES feature with the Au1200 and Linux

May 16, 2005 (Header file only)
diff -rwbupN -x CVS linux/include/asm-mips/mach-au1x00/au1xxx_aes.h linux-vlim/include/asm-mips/mach-au1x00/au1xxx_aes.h
--- linux/include/asm-mips/mach-au1x00/au1xxx_aes.h        1969-12-31 18:00:00.000000000 -0600
+++ linux-vlim/include/asm-mips/mach-au1x00/au1xxx_aes.h        2005-01-30 14:55:37.000000000 -0600
@@ -0,0 +1,157 @@
+/*
+ *        API to Alchemy AES
+ *
+ * Copyright 2005 AMD
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __AU1XXX_AES_H
+#define __AU1XXX_AES_H
+
+/*
+################################################################################################
+#####                         AES Block Register Definitions                               #####
+################################################################################################
+*/
+#define AES_STATUS                         0x0000
+#define AES_INDATA                         0x0004
+#define AES_OUTDATA                        0x0008
+#define AES_INTCAUSE                       0x000C
+#define AES_CONFIG                         0x0010
+
+/* BASIC DATA TYPES */
+typedef unsigned long uint32;
+
+#ifndef ASSEMBLER
+typedef volatile struct
+{
+        uint32         status;                /* 0x00 */
+        uint32         indata;                /* 0x04 */
+        uint32         outdata;               /* 0x08 */
+        uint32         intcause;              /* 0x0C */
+        uint32         config;                /* 0x10 */
+} AU1200_AES;
+#endif
+
+/* AES Registers Defines */
+#define AES_STATUS_PS                (1<<0)                /* AES Process start/stop */
+#define AES_STATUS_IE                (1<<1)                /* Interrupt Enable */
+#define AES_STATUS_CR_N(n)           ((n&0x03)<<2)         /* clock divider */
+#define AES_STATUS_OUT               (1<<4)                /* TX request */
+#define AES_STATUS_IN                (1<<5)                /* RX request */
+
+#define AES_INT_RDY                  (1<<0)                /* En/Decryption Completion */
+#define AES_INT_OVR                  (1<<1)                /* RX error */
+#define AES_INT_UND                  (1<<2)                /* TX error */
+
+#define AES_CONFIG_ED                (1<<0)                /* En/Decryption Select */
+#define AES_CONFIG_IKG               (1<<1)                /* Internal Key Generation */
+#define AES_CONFIG_RPK               (1<<2)                /* Software Replay Key */
+#define AES_CONFIG_RK                (1<<3)                /* Internal reuse key */
+#define AES_CONFIG_UC                (1<<4)                /* Undefined block count */
+#define AES_CONFIG_OP_N(n)           ((n&0x03)<<5)         /* Mode of operation */
+
+#ifndef AES_PHYS_ADDR
+#define AES_PHYS_ADDR                0x10300000
+#endif
+
+#define SIZE_OF_AES_BUFFER           256*1024
+#define NUM_OF_BYTES                     4
+/*
+* This AES_Input/Output_Structure is created to service
+* Byte stream as input that is not in natural order as
+* the processor, in this case for MIPS, is little endian
+*
+* All data type are involved except AES_Config and
+* AES_Status cuz they are control registers that
+* configured by setting the bits.
+*
+*/
+
+typedef struct {
+        uint32 AES_Config;
+        uint32 AES_Status;
+} AES_CONTROL;
+
+typedef struct {
+        unsigned char key0[NUM_OF_BYTES];
+        unsigned char key1[NUM_OF_BYTES];
+        unsigned char key2[NUM_OF_BYTES];
+        unsigned char key3[NUM_OF_BYTES];
+} AES_KEY;
+
+typedef struct {
+        unsigned char IV0[NUM_OF_BYTES];
+        unsigned char IV1[NUM_OF_BYTES];
+        unsigned char IV2[NUM_OF_BYTES];
+        unsigned char IV3[NUM_OF_BYTES];
+} AES_IV;
+
+typedef struct {
+        unsigned char RPK0[NUM_OF_BYTES];
+        unsigned char RPK1[NUM_OF_BYTES];
+        unsigned char RPK2[NUM_OF_BYTES];
+        unsigned char RPK3[NUM_OF_BYTES];
+} AES_RPK ;
+
+#define SIZE_OF_RPK_KEY              sizeof(AES_RPK) /* replay key (4x4 bytes)*/
+#define SIZE_OF_AES_CONTROL          sizeof(AES_RPK)
+
+/*
+        This padding is used to ensure the AES_Input data type
+        size is similiar to AES_Output.
+
+        The better approach is move the indata/outdata member
+        to the beginning of the structure. Unfortunately,
+        this break all the testcases for its assumption of
+        the previous layout.
+*/
+typedef struct {
+        uint32 pad0;
+        uint32 pad1;
+        uint32 pad2;
+        uint32 pad3;
+        uint32 pad4;
+        uint32 pad5;
+        uint32 pad6;
+} AES_Unused;
+
+typedef struct AES_Input_Struct
+{
+        AES_CONTROL ctrl;
+        AES_KEY key;
+        AES_IV IV;
+        uint32        swap;
+        unsigned char * indata;
+
+} AES_Input;
+
+typedef struct AES_Output_Struct
+{
+
+        AES_RPK RPK;
+        AES_Unused Unused;
+        unsigned char * outdata;
+
+} AES_Output;
+
+#endif /* __AU1XXX_AES_H */