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/* $OpenBSD: lofnreg.h,v 1.11 2001/07/04 05:58:29 jason Exp $ */
/*
* Copyright (c) 2001 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
*/
#define LOFN_BAR0 0x0010 /* base address register */
#define LOFN_WIN_0 0x0000 /* 0 - rev byte, norm word */
#define LOFN_WIN_1 0x2000 /* 1 - rev byte, rev word */
#define LOFN_WIN_2 0x4000 /* 2 - norm byte, norm word */
#define LOFN_WIN_3 0x6000 /* 3 - norm byte, rev word */
/* Bignum registers */
#define LOFN_REL_DATA 0x0000 /* Data registers */
#define LOFN_REL_DATA_END 0x07ff
/* Length registers */
#define LOFN_REL_LEN 0x1000 /* Length tags */
#define LOFN_REL_LEN_REGS 0x103f
/* RNG FIFO space */
#define LOFN_REL_RNG 0x1080 /* RNG FIFO start */
#define LOFN_REL_RNG_END 0x10bf /* RNG FIFO end */
/* Instruction space */
#define LOFN_REL_INSTR 0x1100 /* Instructions */
#define LOFN_REL_INSTR_END 0x117f
/* Control and status registers, relative to window number */
#define LOFN_REL_CR 0x1fd4 /* Command */
#define LOFN_REL_SR 0x1fd8 /* Status */
#define LOFN_REL_IER 0x1fdc /* Interrupt enable */
#define LOFN_REL_RNC 0x1fe0 /* RNG config */
#define LOFN_REL_CFG1 0x1fe4 /* Config1 */
#define LOFN_REL_CFG2 0x1fe8 /* Config2 */
#define LOFN_REL_CHIPID 0x1fec /* Chip ID */
/* Data register access */
#define LOFN_REG_MASK 0x0f80 /* Register number mask */
#define LOFN_REG_SHIFT 7
#define LOFN_WORD_MASK 0x007c /* Word index mask */
#define LOFN_WORD_SHIFT 2
/* Command address register (LOFN_REL_CR) */
#define LOFN_CR_ADDR_MASK 0x0000003f /* Instruction addr offset */
/* Status register (LOFN_REL_SR) */
#define LOFN_SR_CARRY 0x00000008 /* Carry from operation */
#define LOFN_SR_RNG_UF 0x00001000 /* RNG underflow */
#define LOFN_SR_RNG_RDY 0x00004000 /* RNG ready */
#define LOFN_SR_DONE 0x00008000 /* Operation done */
/* Interrupt enable register (LOFN_REL_IER) */
#define LOFN_IER_RDY 0x00004000 /* RNG ready */
#define LOFN_IER_DONE 0x00008000 /* Operation done */
/* Random number configuration (LOFN_REL_RNC) */
#define LOFN_RNC_OUTSCALE 0x00000080 /* Output prescalar */
#define LOFN_RNC_1STSCALE 0x00000f00 /* First prescalar */
/* Config register 1 (LOFN_REL_CFG1) */
#define LOFN_CFG1_RESET 0x00000001 /* Reset */
#define LOFN_CFG1_MULTI 0x00000038 /* PLL multiple */
#define LOFN_CFG1_MULTI_BYP 0x00000000 /* PLL bypass */
#define LOFN_CFG1_MULTI_1X 0x00000008 /* 1x CLK */
#define LOFN_CFG1_MULTI_15X 0x00000010 /* 1.5x CLK */
#define LOFN_CFG1_MULTI_2X 0x00000018 /* 2x CLK */
#define LOFN_CFG1_MULTI_25X 0x00000020 /* 2.5x CLK */
#define LOFN_CFG1_MULTI_3X 0x00000028 /* 3x CLK */
#define LOFN_CFG1_MULTI_4X 0x00000030 /* 4x CLK */
#define LOFN_CFG1_CLOCK 0x00000040 /* Clock select */
/* Config register 2 (LOFN_REL_CFG2) */
#define LOFN_CFG2_RNGENA 0x00000001 /* RNG enable */
#define LOFN_CFG2_PRCENA 0x00000002 /* Processor enable */
/* Chip identification (LOFN_REL_CHIPID) */
#define LOFN_CHIPID_MASK 0x0000ffff /* Chip ID */
#define LOFN_REGADDR(win,r,idx) \
((win) | \
(((r) << LOFN_REG_SHIFT) & LOFN_REG_MASK) | \
(((idx) << LOFN_WORD_SHIFT) & LOFN_WORD_MASK))
#define LOFN_LENADDR(win,r) \
((win) | (((r) << 2) + LOFN_REL_LEN))
#define LOFN_LENMASK 0x000007ff /* mask for length space */
#define OP_DONE 0x80000000 /* final instruction */
#define OP_CODE_MASK 0x7c000000 /* opcode mask */
#define OP_CODE_MODEXP 0x00000000 /* modular exponentiation */
#define OP_CODE_MODMUL 0x04000000 /* modular multiplication */
#define OP_CODE_MODRED 0x08000000 /* modular reduction */
#define OP_CODE_MODADD 0x0c000000 /* modular addition */
#define OP_CODE_MODSUB 0x10000000 /* modular subtraction */
#define OP_CODE_ADD 0x14000000 /* addition */
#define OP_CODE_SUB 0x18000000 /* subtraction */
#define OP_CODE_ADDC 0x1c000000 /* addition with carry */
#define OP_CODE_SUBC 0x20000000 /* subtraction with carry */
#define OP_CODE_MULT 0x24000000 /* 2048bit multiplication */
#define OP_CODE_SR 0x28000000 /* shift right */
#define OP_CODE_SL 0x2c000000 /* shift left */
#define OP_CODE_INC 0x30000000 /* increment */
#define OP_CODE_DEC 0x34000000 /* decrement */
#define OP_CODE_TAG 0x38000000 /* set length tag */
#define OP_CODE_NOP 0x7c000000 /* nop */
#define OP_RD_SHIFT 21
#define OP_RA_SHIFT 16
#define OP_RB_SHIFT 11
#define OP_RM_SHIFT 6
#define OP_R_MASK 0x1f
#define OP_LEN_MASK 0xffff
#define LOFN_INSTR(done,op,rd,ra,rb,rm) \
((done) | (op) | \
(((rd) & OP_R_MASK) << OP_RD_SHIFT) | \
(((ra) & OP_R_MASK) << OP_RA_SHIFT) | \
(((rb) & OP_R_MASK) << OP_RB_SHIFT) | \
(((rm) & OP_R_MASK) << OP_RM_SHIFT))
#define LOFN_INSTR2(done,op,rd,ra,len) \
((done) | (op) | \
(((rd) & OP_R_MASK) << OP_RD_SHIFT) | \
(((ra) & OP_R_MASK) << OP_RA_SHIFT) | \
((len) & OP_LEN_MASK))
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