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/*
* arch/ubicom32/crypto/crypto_ubicom32.h
* Support for Ubicom32 cryptographic instructions.
*
* (C) Copyright 2009, Ubicom, Inc.
*
* This file is part of the Ubicom32 Linux Kernel Port.
*
* The Ubicom32 Linux Kernel Port 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.
*
* The Ubicom32 Linux Kernel Port is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Ubicom32 Linux Kernel Port. If not,
* see <http://www.gnu.org/licenses/>.
*
* Ubicom32 implementation derived from (with many thanks):
* arch/m68knommu
* arch/blackfin
* arch/parisc
*/
#ifndef _CRYPTO_ARCH_UBICOM32_CRYPT_H
#define _CRYPTO_ARCH_UBICOM32_CRYPT_H
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/spinlock.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/ip5000.h>
#define CRYPTO_UBICOM32_LOOP_ASM 1
#define CRYPTO_UBICOM32_ALIGNMENT 4
#define SEC_ALIGNED(p) (((u32)p & 3) == 0)
#define SEC_BASE SECURITY_BASE
#define SEC_KEY_OFFSET SECURITY_KEY_VALUE(0)
#define SEC_INPUT_OFFSET SECURITY_KEY_IN(0)
#define SEC_OUTPUT_OFFSET SECURITY_KEY_OUT(0)
#define SEC_HASH_OFFSET SECURITY_KEY_HASH(0)
#define SEC_KEY_128_BITS SECURITY_CTRL_KEY_SIZE(0)
#define SEC_KEY_192_BITS SECURITY_CTRL_KEY_SIZE(1)
#define SEC_KEY_256_BITS SECURITY_CTRL_KEY_SIZE(2)
#define SEC_HASH_NONE SECURITY_CTRL_HASH_ALG_NONE
#define SEC_HASH_MD5 SECURITY_CTRL_HASH_ALG_MD5
#define SEC_HASH_SHA1 SECURITY_CTRL_HASH_ALG_SHA1
#define SEC_CBC_SET SECURITY_CTRL_CBC
#define SEC_CBC_NONE 0
#define SEC_ALG_AES SECURITY_CTRL_CIPHER_ALG_AES
#define SEC_ALG_NONE SECURITY_CTRL_CIPHER_ALG_NONE
#define SEC_ALG_DES SECURITY_CTRL_CIPHER_ALG_DES
#define SEC_ALG_3DES SECURITY_CTRL_CIPHER_ALG_3DES
#define SEC_DIR_ENCRYPT SECURITY_CTRL_ENCIPHER
#define SEC_DIR_DECRYPT 0
#define CRYPTO_UBICOM32_PRIORITY 300
#define CRYPTO_UBICOM32_COMPOSITE_PRIORITY 400
#define HW_CRYPTO_PS_MAX_IDLE_MS 100 /* idle time (ms) before shuting down sm */
extern spinlock_t crypto_ubicom32_lock;
extern bool crypto_ubicom32_inited;
extern volatile bool crypto_ubicom32_on;
extern volatile unsigned long crypto_ubicom32_last_use;
extern struct timer_list crypto_ubicom32_ps_timer;
extern void crypto_ubicom32_ps_check(unsigned long data);
#define SEC_COPY_2W(t, s) \
asm volatile ( \
" move.4 0(%0), 0(%1) \n\t" \
" move.4 4(%0), 4(%1) \n\t" \
\
: \
: "a" (t), "a" (s) \
)
#define SEC_COPY_4W(t, s) \
asm volatile ( \
" move.4 0(%0), 0(%1) \n\t" \
" move.4 4(%0), 4(%1) \n\t" \
" move.4 8(%0), 8(%1) \n\t" \
" move.4 12(%0), 12(%1) \n\t" \
: \
: "a" (t), "a" (s) \
)
#define SEC_COPY_5W(t, s) \
asm volatile ( \
" move.4 0(%0), 0(%1) \n\t" \
" move.4 4(%0), 4(%1) \n\t" \
" move.4 8(%0), 8(%1) \n\t" \
" move.4 12(%0), 12(%1) \n\t" \
" move.4 16(%0), 16(%1) \n\t" \
: \
: "a" (t), "a" (s) \
)
#define SEC_SET_KEY_2W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x10(%0), 0(%1) \n\t" \
" move.4 0x14(%0), 4(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_SET_KEY_4W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x10(%0), 0(%1) \n\t" \
" move.4 0x14(%0), 4(%1) \n\t" \
" move.4 0x18(%0), 8(%1) \n\t" \
" move.4 0x1c(%0), 12(%1) \n\t" \
: \
: "a"(SECURITY_BASE), "a"(x) \
)
#define SEC_SET_KEY_6W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x10(%0), 0(%1) \n\t" \
" move.4 0x14(%0), 4(%1) \n\t" \
" move.4 0x18(%0), 8(%1) \n\t" \
" move.4 0x1c(%0), 12(%1) \n\t" \
" move.4 0x20(%0), 16(%1) \n\t" \
" move.4 0x24(%0), 20(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_SET_KEY_8W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x10(%0), 0(%1) \n\t" \
" move.4 0x14(%0), 4(%1) \n\t" \
" move.4 0x18(%0), 8(%1) \n\t" \
" move.4 0x1c(%0), 12(%1) \n\t" \
" move.4 0x20(%0), 16(%1) \n\t" \
" move.4 0x24(%0), 20(%1) \n\t" \
" move.4 0x28(%0), 24(%1) \n\t" \
" move.4 0x2c(%0), 28(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_SET_KEY_64(k) SEC_SET_KEY_2W(k)
#define SEC_SET_KEY_128(k) SEC_SET_KEY_4W(k)
#define SEC_SET_KEY_192(k) SEC_SET_KEY_6W(k)
#define SEC_SET_KEY_256(k) SEC_SET_KEY_8W(k)
#define DES_SET_KEY(x) SEC_SET_KEY_64(x)
#define DES3_SET_KEY(x) SEC_SET_KEY_192(x)
#define SEC_SET_INPUT_2W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x30(%0), 0(%1) \n\t" \
" move.4 0x34(%0), 4(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_GET_OUTPUT_2W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0(%1), 0x50(%0) \n\t" \
" move.4 4(%1), 0x54(%0) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_SET_INPUT_4W(x) \
asm volatile ( \
" ; write key to Security Keyblock \n\t" \
" move.4 0x30(%0), 0(%1) \n\t" \
" move.4 0x34(%0), 4(%1) \n\t" \
" move.4 0x38(%0), 8(%1) \n\t" \
" move.4 0x3c(%0), 12(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_GET_OUTPUT_4W(x) \
asm volatile ( \
" ; read output from Security Keyblock \n\t" \
" move.4 0(%1), 0x50(%0) \n\t" \
" move.4 4(%1), 0x54(%0) \n\t" \
" move.4 8(%1), 0x58(%0) \n\t" \
" move.4 12(%1), 0x5c(%0) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_SET_IV_4W(x) \
asm volatile ( \
" ; write IV to Security Keyblock \n\t" \
" move.4 0x50(%0), 0(%1) \n\t" \
" move.4 0x54(%0), 4(%1) \n\t" \
" move.4 0x58(%0), 8(%1) \n\t" \
" move.4 0x5c(%0), 12(%1) \n\t" \
: \
: "a" (SECURITY_BASE), "a" (x) \
)
#define SEC_PIPE_FLUSH() asm volatile ( " pipe_flush 0 \n\t" )
static inline void hw_crypto_set_ctrl(uint32_t c)
{
asm volatile (
" move.4 0(%0), %1 \n\t"
:
: "a" (SECURITY_BASE + SECURITY_CTRL), "d" (c)
);
}
static inline void hw_crypto_ps_start(void)
{
crypto_ubicom32_ps_timer.expires = jiffies + msecs_to_jiffies(HW_CRYPTO_PS_MAX_IDLE_MS >> 1);
add_timer(&crypto_ubicom32_ps_timer);
}
static inline void hw_crypto_turn_on(void)
{
asm volatile (
" moveai A4, %0 \n\t"
" bset 0x0(A4), 0x0(A4), %1 \n\t"
" cycles 11 \n\t"
:
: "i" (OCP_BASE >> 7), "i" (GEN_CLK_PLL_SECURITY_BIT_NO)
: "a4", "cc"
);
crypto_ubicom32_on = true;
}
static inline void hw_crypto_turn_off(void)
{
asm volatile (
" moveai A4, %0 \n\t"
" bclr 0x0(A4), 0x0(A4), %1 \n\t"
:
: "i" (OCP_BASE >> 7), "i" (GEN_CLK_PLL_SECURITY_BIT_NO)
: "a4", "cc"
);
crypto_ubicom32_on = false;
}
/*
* hw_crypto_check
* Most probably hw crypto is called in clusters and it makes no sense to turn it off
* and on and waster 13 cycles every time.
*/
static inline void hw_crypto_check(void)
{
if (likely(crypto_ubicom32_on)) {
return;
}
crypto_ubicom32_last_use = jiffies;
hw_crypto_turn_on();
hw_crypto_ps_start();
}
/*
* hw_crypto_ps_init
* Init power save timer
*/
static inline void hw_crypto_ps_init(void)
{
init_timer_deferrable(&crypto_ubicom32_ps_timer);
crypto_ubicom32_ps_timer.function = crypto_ubicom32_ps_check;
crypto_ubicom32_ps_timer.data = 0;
}
/*
* hw_crypto_init()
* Initialize OCP security module lock and disables its clock.
*/
static inline void hw_crypto_init(void)
{
if (!crypto_ubicom32_inited) {
crypto_ubicom32_inited = true;
spin_lock_init(&crypto_ubicom32_lock);
hw_crypto_ps_init();
hw_crypto_turn_off();
}
}
/*
* hw_crypto_lock()
* Locks the OCP security module and enables its clock.
*/
static inline void hw_crypto_lock(void)
{
spin_lock_bh(&crypto_ubicom32_lock);
}
/*
* hw_crypto_unlock()
* Unlocks the OCP security module and disables its clock.
*/
static inline void hw_crypto_unlock(void)
{
crypto_ubicom32_last_use = jiffies;
spin_unlock_bh(&crypto_ubicom32_lock);
}
#define CONFIG_CRYPTO_UBICOM32_DEBUG 1
#ifdef CONFIG_CRYPTO_UBICOM32_DEBUG
static inline void hex_dump(void *buf, int b_size, const char *msg)
{
u8 *b = (u8 *)buf;
int i;
if (msg) {
printk("%s:\t", msg);
}
for (i=0; i < b_size; i++) {
printk("%02x ", b[i]);
if ((i & 3) == 3) {
printk(" ");
}
if ((i & 31) == 31) {
printk("\n");
}
}
printk("\n");
}
#define UBICOM32_SEC_DUMP(a, b, c) hex_dump(a, b, c)
#else
#define UBICOM32_SEC_DUMP(a, b, c)
#endif
#endif /* _CRYPTO_ARCH_UBICOM32_CRYPT_H */
|
