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366 lines
8.7 KiB
C
366 lines
8.7 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2010 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \author Francesco Sacchi <batt@develer.com>
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* \author Daniele Basile <asterix@develer.com>
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*
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* \brief NPX lpc23xx embedded flash read/write driver.
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*
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* notest:arm
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*/
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#include "flash_lpc2.h"
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#include "cfg/cfg_emb_flash.h"
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// Define log settings for cfg/log.h
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#define LOG_LEVEL CONFIG_FLASH_EMB_LOG_LEVEL
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#define LOG_FORMAT CONFIG_FLASH_EMB_LOG_FORMAT
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#include <cfg/log.h>
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#include <cfg/macros.h>
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#include <cpu/irq.h>
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#include <cpu/attr.h>
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#include <cpu/power.h>
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#include <cpu/types.h>
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#include <io/kblock.h>
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#include <io/arm.h>
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#include <drv/timer.h>
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#include <drv/flash.h>
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#include <struct/bitarray.h>
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#include <string.h>
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/* Embedded flash programming defines. */
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#define IAP_ADDRESS 0x7ffffff1
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typedef enum IapCommands
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{
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PREPARE_SECTOR_FOR_WRITE = 50,
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COPY_RAM_TO_FLASH = 51,
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ERASE_SECTOR = 52,
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BLANK_CHECK_SECTOR = 53,
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READ_PART_ID = 54,
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READ_BOOT_VER = 55,
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COMPARE = 56,
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REINVOKE_ISP = 57,
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} IapCommands;
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#if CPU_ARM_LPC2378
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#define FLASH_MEM_SIZE (504 * 1024L)
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#define FLASH_PAGE_SIZE_BYTES 4096
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#define FLASH_REAL_PAGE_CNT 28
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#else
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#error Unknown CPU
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#endif
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#define CMD_SUCCESS 0
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struct FlashHardware
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{
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uint8_t status;
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int flags;
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};
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#define FLASH_PAGE_CNT FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES
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BITARRAY_ALLOC(page_dirty, FLASH_PAGE_CNT);
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static BitArray lpc2_bitx;
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uint8_t erase_group[] = {
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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32768 / FLASH_PAGE_SIZE_BYTES, 32768 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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4096 / FLASH_PAGE_SIZE_BYTES, 4096 / FLASH_PAGE_SIZE_BYTES,
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};
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typedef struct IapCmd
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{
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uint32_t cmd;
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uint32_t param[4];
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} IapCmd;
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typedef struct IapRes
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{
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uint32_t status;
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uint32_t res[2];
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} IapRes;
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typedef void (*iap_callback_t)(IapCmd *, IapRes *);
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iap_callback_t iap = (iap_callback_t)IAP_ADDRESS;
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static size_t sector_size(uint32_t page)
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{
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if (page < 8)
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return 4096;
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else if (page < 22)
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return 32768;
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else if (page < 28)
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return 4096;
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ASSERT(0);
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return 0;
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}
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static size_t sector_addr(uint32_t page)
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{
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if (page < 8)
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return page * 4096;
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else if (page < 22)
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return (page - 8) * 32768 + 4096 * 8;
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else if (page < 28)
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return (page - 22) * 4096 + 32768 * 14 + 4096 * 8;
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ASSERT(0);
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return 0;
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}
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static uint32_t addr_to_sector(size_t addr)
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{
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if (addr < 4096 * 8)
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return addr / 4096;
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else if (addr < 4096 * 8 + 32768L * 14)
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return ((addr - 4096 * 8) / 32768) + 8;
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else if (addr < 4096 * 8 + 32768L * 14 + 4096 * 6)
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return ((addr - 4096 * 8 - 32768L * 14) / 4096) + 22;
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ASSERT(0);
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return 0;
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}
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static size_t lpc2_flash_readDirect(struct KBlock *blk, block_idx_t idx, void *buf, size_t offset, size_t size)
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{
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memcpy(buf, (void *)(idx * blk->blk_size + offset), size);
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return size;
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}
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static size_t lpc2_flash_writeDirect(struct KBlock *blk, block_idx_t idx, const void *_buf, size_t offset, size_t size)
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{
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ASSERT(offset == 0);
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ASSERT(FLASH_PAGE_SIZE_BYTES == size);
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Flash *fls = FLASH_CAST(blk);
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if (!(fls->hw->flags & FLASH_WRITE_ONCE))
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ASSERT(sector_size(idx) <= FLASH_PAGE_SIZE_BYTES);
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const uint8_t *buf = (const uint8_t *)_buf;
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cpu_flags_t flags;
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//Compute page address of current page.
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uint32_t addr = idx * blk->blk_size;
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uint32_t sector = addr_to_sector(addr);
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// Compute the first page index in the sector to manage the status
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int idx_sector = sector_addr(sector) / blk->blk_size;
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LOG_INFO("Writing page[%ld]sector[%ld]idx[%d]\n", idx, sector, idx_sector);
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IRQ_SAVE_DISABLE(flags);
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IapCmd cmd;
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IapRes res;
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cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
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cmd.param[0] = cmd.param[1] = sector;
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iap(&cmd, &res);
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if (res.status != CMD_SUCCESS)
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goto flash_error;
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if ((fls->hw->flags & FLASH_WRITE_ONCE) &&
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bitarray_isRangeFull(&lpc2_bitx, idx_sector, erase_group[sector]))
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{
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kputs("blocchi pieni\n");
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ASSERT(0);
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goto flash_error;
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}
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bool erase = false;
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if ((fls->hw->flags & FLASH_WRITE_ONCE) &&
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bitarray_isRangeEmpty(&lpc2_bitx, idx_sector, erase_group[sector]))
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erase = true;
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if (!(fls->hw->flags & FLASH_WRITE_ONCE))
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erase = true;
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if (erase)
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{
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cmd.cmd = ERASE_SECTOR;
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cmd.param[0] = cmd.param[1] = sector;
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cmd.param[2] = CPU_FREQ / 1000;
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iap(&cmd, &res);
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if (res.status != CMD_SUCCESS)
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goto flash_error;
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}
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LOG_INFO("Writing page [%ld], addr [%ld] in sector[%ld]\n", idx, addr, sector);
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cmd.cmd = PREPARE_SECTOR_FOR_WRITE;
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cmd.param[0] = cmd.param[1] = sector;
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iap(&cmd, &res);
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if (res.status != CMD_SUCCESS)
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goto flash_error;
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if (fls->hw->flags & FLASH_WRITE_ONCE)
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{
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if (bitarray_test(&lpc2_bitx, idx))
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{
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ASSERT(0);
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goto flash_error;
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}
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else
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bitarray_set(&lpc2_bitx, idx);
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}
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cmd.cmd = COPY_RAM_TO_FLASH;
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cmd.param[0] = addr;
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cmd.param[1] = (uint32_t)buf;
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cmd.param[2] = FLASH_PAGE_SIZE_BYTES;
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cmd.param[3] = CPU_FREQ / 1000;
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iap(&cmd, &res);
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if (res.status != CMD_SUCCESS)
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goto flash_error;
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IRQ_RESTORE(flags);
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LOG_INFO("Done\n");
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return blk->blk_size;
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flash_error:
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IRQ_RESTORE(flags);
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LOG_ERR("%ld\n", res.status);
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fls->hw->status |= FLASH_WR_ERR;
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return 0;
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}
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static int lpc2_flash_close(UNUSED_ARG(struct KBlock, *blk))
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{
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memset(page_dirty, 0, sizeof(page_dirty));
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return 0;
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}
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static int lpc2_flash_error(struct KBlock *blk)
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{
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Flash *fls = FLASH_CAST(blk);
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return fls->hw->status;
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}
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static void lpc2_flash_clearerror(struct KBlock *blk)
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{
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Flash *fls = FLASH_CAST(blk);
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fls->hw->status = 0;
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}
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static const KBlockVTable flash_lpc2_buffered_vt =
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{
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.readDirect = lpc2_flash_readDirect,
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.writeDirect = lpc2_flash_writeDirect,
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.readBuf = kblock_swReadBuf,
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.writeBuf = kblock_swWriteBuf,
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.load = kblock_swLoad,
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.store = kblock_swStore,
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.close = lpc2_flash_close,
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.error = lpc2_flash_error,
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.clearerr = lpc2_flash_clearerror,
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};
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static const KBlockVTable flash_lpc2_unbuffered_vt =
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{
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.readDirect = lpc2_flash_readDirect,
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.writeDirect = lpc2_flash_writeDirect,
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.close = lpc2_flash_close,
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.error = lpc2_flash_error,
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.clearerr = lpc2_flash_clearerror,
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};
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static struct FlashHardware flash_lpc2_hw;
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static uint8_t flash_buf[FLASH_PAGE_SIZE_BYTES];
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static void common_init(Flash *fls, int flags)
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{
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memset(fls, 0, sizeof(*fls));
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DB(fls->blk.priv.type = KBT_FLASH);
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fls->hw = &flash_lpc2_hw;
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fls->hw->flags = flags;
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fls->blk.blk_size = FLASH_PAGE_SIZE_BYTES;
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fls->blk.blk_cnt = FLASH_MEM_SIZE / FLASH_PAGE_SIZE_BYTES;
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bitarray_init(&lpc2_bitx, FLASH_PAGE_CNT, page_dirty, sizeof(page_dirty));
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}
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void flash_hw_init(Flash *fls, int flags)
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{
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common_init(fls, flags);
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fls->blk.priv.vt = &flash_lpc2_buffered_vt;
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fls->blk.priv.flags |= KB_BUFFERED | KB_PARTIAL_WRITE;
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fls->blk.priv.buf = flash_buf;
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/* Load the first block in the cache */
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void *flash_start = 0x0;
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memcpy(fls->blk.priv.buf, flash_start, fls->blk.blk_size);
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}
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void flash_hw_initUnbuffered(Flash *fls, int flags)
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{
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common_init(fls, flags);
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fls->blk.priv.vt = &flash_lpc2_unbuffered_vt;
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}
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