mirror of https://github.com/ARMmbed/mbed-os.git
237 lines
7.7 KiB
C
237 lines
7.7 KiB
C
/**
|
|
* @file maa.c
|
|
* @brief Modular Arithmetic Accelerator (MAA) API Function Implementations.
|
|
*/
|
|
/* *****************************************************************************
|
|
* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Except as contained in this notice, the name of Maxim Integrated
|
|
* Products, Inc. shall not be used except as stated in the Maxim Integrated
|
|
* Products, Inc. Branding Policy.
|
|
*
|
|
* The mere transfer of this software does not imply any licenses
|
|
* of trade secrets, proprietary technology, copyrights, patents,
|
|
* trademarks, maskwork rights, or any other form of intellectual
|
|
* property whatsoever. Maxim Integrated Products, Inc. retains all
|
|
* ownership rights.
|
|
*
|
|
**************************************************************************** */
|
|
|
|
/* **** Includes **** */
|
|
#include <string.h>
|
|
#include "mxc_assert.h"
|
|
#include "mxc_lock.h"
|
|
#include "mxc_sys.h"
|
|
#include "maa.h"
|
|
|
|
/**
|
|
* @ingroup maa
|
|
* @{
|
|
*/
|
|
|
|
///@cond
|
|
#define maa_is_running() (MXC_MAA->ctrl & MXC_F_MAA_CTRL_START ? 1 : 0)
|
|
|
|
/**
|
|
* Macro that translates from #mxc_maa_reg_select_t to a pointer for MAA memory operations.
|
|
*/
|
|
#define UMAA_REGFILE_TO_ADDR(base, x) ((base + (MXC_MAA_HALF_SIZE * x)))
|
|
|
|
/**
|
|
* Macro that adjusts the pointer so that it is pointing to the last 32-bit word in the maa (sub-)segment
|
|
*/
|
|
#define UMAA_ADDR_INDEX_LAST_32BIT(x) ((uint8_t *)x + (MXC_MAA_HALF_SIZE-4))
|
|
///@endcond
|
|
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_Init(void)
|
|
{
|
|
SYS_MAA_Init();
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_WipeRAM(void)
|
|
{
|
|
/* Check for running MAA */
|
|
if (maa_is_running()) {
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
/* Clear register files */
|
|
memset((void *)MXC_MAA_MEM->seg0, 0, sizeof(MXC_MAA_MEM->seg0));
|
|
memset((void *)MXC_MAA_MEM->seg1, 0, sizeof(MXC_MAA_MEM->seg1));
|
|
memset((void *)MXC_MAA_MEM->seg2, 0, sizeof(MXC_MAA_MEM->seg2));
|
|
memset((void *)MXC_MAA_MEM->seg3, 0, sizeof(MXC_MAA_MEM->seg3));
|
|
memset((void *)MXC_MAA_MEM->seg4, 0, sizeof(MXC_MAA_MEM->seg4));
|
|
memset((void *)MXC_MAA_MEM->seg5, 0, sizeof(MXC_MAA_MEM->seg5));
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_Load(mxc_maa_reg_select_t regfile, const uint8_t *data, unsigned int size, mxc_maa_endian_select_t flag)
|
|
{
|
|
uint32_t *maaptr;
|
|
uint32_t fill;
|
|
unsigned int zerotmp;
|
|
|
|
if ((regfile > MXC_E_REG_51) || (size > MXC_MAA_REG_SIZE)) {
|
|
/* Out of range */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
if (flag == MXC_MAA_F_MEM_REVERSE) {
|
|
/* This is not currently implemented */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
maaptr = (uint32_t *)UMAA_REGFILE_TO_ADDR(MXC_BASE_MAA_MEM, regfile);
|
|
|
|
/*
|
|
* MAA (sub-)segments must be loaded with zero pad to a 64-bit boundary, or the "garbage bits"
|
|
* will case erroneous results.
|
|
*/
|
|
/* Find the ceiling for the closest 64-bit boundary based on the selected MAWS */
|
|
zerotmp = (((MXC_MAA->maws & MXC_F_MAA_MAWS_MODLEN) >> MXC_F_MAA_MAWS_MODLEN_POS) + 63) & 0xfc0;
|
|
/* Convert to bytes */
|
|
zerotmp /= 8;
|
|
|
|
/* Fill uMAA memory in long word sized chunks */
|
|
while (size > 3) {
|
|
*maaptr++ = (data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0];
|
|
data += 4;
|
|
size -= 4;
|
|
zerotmp = (zerotmp > 4) ? (zerotmp - 4) : 0;
|
|
}
|
|
|
|
/* Remainder */
|
|
if (size) {
|
|
fill = data[0];
|
|
fill |= ((size > 1) ? (data[1] << 8) : 0);
|
|
fill |= ((size > 2) ? (data[2] << 16) : 0);
|
|
*maaptr++ = fill;
|
|
|
|
/* We just filled 4 bytes in this section */
|
|
zerotmp = (zerotmp > 4) ? (zerotmp - 4) : 0;
|
|
}
|
|
|
|
/* Wipe the remaining "garbage bits" */
|
|
while (zerotmp) {
|
|
*maaptr++ = 0;
|
|
zerotmp = (zerotmp > 4) ? (zerotmp - 4) : 0;
|
|
}
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_Unload(mxc_maa_reg_select_t regfile, uint8_t *data, unsigned int size, mxc_maa_endian_select_t flag)
|
|
{
|
|
uint32_t *maaptr;
|
|
uint32_t fill;
|
|
|
|
if ((regfile > MXC_E_REG_51) || (size > MXC_MAA_REG_SIZE)) {
|
|
/* Out of range */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
if (flag == MXC_MAA_F_MEM_REVERSE) {
|
|
/* This is not currently implemented */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
maaptr = (uint32_t *)UMAA_REGFILE_TO_ADDR(MXC_BASE_MAA_MEM, regfile);
|
|
|
|
/* Unload uMAA memory in long word sized chunks */
|
|
while (size > 3) {
|
|
fill = *maaptr++;
|
|
data[0] = fill & 0xff;
|
|
data[1] = (fill >> 8) & 0xff;
|
|
data[2] = (fill >> 16) & 0xff;
|
|
data[3] = (fill >> 24) & 0xff;
|
|
data += 4;
|
|
size -= 4;
|
|
}
|
|
|
|
/* Remainder */
|
|
if (size) {
|
|
fill = *maaptr;
|
|
data[0] = fill & 0xff;
|
|
if (size > 1) {
|
|
data[1] = (fill >> 8) & 0xff;
|
|
}
|
|
if (size > 2) {
|
|
data[2] = (fill >> 16) & 0xff;
|
|
}
|
|
}
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_Run(mxc_maa_operation_t op,
|
|
mxc_maa_reg_select_t al, mxc_maa_reg_select_t bl,
|
|
mxc_maa_reg_select_t rl, mxc_maa_reg_select_t tl)
|
|
{
|
|
if (maa_is_running()) {
|
|
/* Attempt to start the MAA while already running */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
/* Clear out any previous flags */
|
|
MXC_MAA->ctrl = 0x00000020;
|
|
|
|
/* Construct memory segment selections, select operation, and start the uMAA */
|
|
MXC_MAA->ctrl = (((al << MXC_F_MAA_CTRL_SEG_A_POS) & MXC_F_MAA_CTRL_SEG_A) |
|
|
((bl << MXC_F_MAA_CTRL_SEG_B_POS) & MXC_F_MAA_CTRL_SEG_B) |
|
|
((rl << MXC_F_MAA_CTRL_SEG_RES_POS) & MXC_F_MAA_CTRL_SEG_RES) |
|
|
((tl << MXC_F_MAA_CTRL_SEG_TMP_POS) & MXC_F_MAA_CTRL_SEG_TMP) |
|
|
((op << MXC_F_MAA_CTRL_OPSEL_POS) & MXC_F_MAA_CTRL_OPSEL) |
|
|
MXC_F_MAA_CTRL_START);
|
|
|
|
/* Blocking wait for uMAA to complete. */
|
|
while ((MXC_MAA->ctrl & MXC_F_MAA_CTRL_IF_DONE) == 0);
|
|
|
|
if (MXC_MAA->ctrl & MXC_F_MAA_CTRL_IF_ERROR) {
|
|
/* MAA signaled error */
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
|
|
/* ************************************************************************* */
|
|
mxc_maa_ret_t MAA_SetWordSize(unsigned int len)
|
|
{
|
|
if ((len > MXC_MAA_REG_SIZE_BITS) || maa_is_running()) {
|
|
return MXC_E_MAA_ERR;
|
|
}
|
|
|
|
/* Set bit length for calculation, and disable endian swap */
|
|
MXC_MAA->maws = ((len << MXC_F_MAA_MAWS_MODLEN_POS) & MXC_F_MAA_MAWS_MODLEN);
|
|
|
|
return MXC_E_MAA_OK;
|
|
}
|
|
/**@} end of ingroup maa */
|