69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
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/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2015 Richard Meadows
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*
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* This program 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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include "stub.h"
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#define EFM32_MSC ((volatile uint32_t *)0x400c0000)
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#define EFM32_MSC_WRITECTRL EFM32_MSC[2]
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#define EFM32_MSC_WRITECMD EFM32_MSC[3]
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#define EFM32_MSC_ADDRB EFM32_MSC[4]
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#define EFM32_MSC_WDATA EFM32_MSC[6]
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#define EFM32_MSC_STATUS EFM32_MSC[7]
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#define EFM32_MSC_LOCK EFM32_MSC[15]
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#define EFM32_MSC_LOCK_LOCKKEY 0x1b71
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#define EFM32_MSC_WRITECMD_LADDRIM (1<<0)
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#define EFM32_MSC_WRITECMD_ERASEPAGE (1<<1)
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#define EFM32_MSC_WRITECMD_WRITEEND (1<<2)
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#define EFM32_MSC_WRITECMD_WRITEONCE (1<<3)
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#define EFM32_MSC_WRITECMD_WRITETRIG (1<<4)
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#define EFM32_MSC_WRITECMD_ERASEABORT (1<<5)
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#define EFM32_MSC_STATUS_BUSY (1<<0)
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#define EFM32_MSC_STATUS_LOCKED (1<<1)
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#define EFM32_MSC_STATUS_INVADDR (1<<2)
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#define EFM32_MSC_STATUS_WDATAREADY (1<<3)
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#define EFM32_MSC_STATUS_WORDTIMEOUT (1<<4)
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void __attribute__((naked))
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efm32_flash_write_stub(uint32_t *dest, uint32_t *src, uint32_t size)
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{
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uint32_t i;
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EFM32_MSC_LOCK = EFM32_MSC_LOCK_LOCKKEY;
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EFM32_MSC_WRITECTRL = 1;
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for (i = 0; i < size/4; i++) {
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EFM32_MSC_ADDRB = (uint32_t)&dest[i];;
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EFM32_MSC_WRITECMD = EFM32_MSC_WRITECMD_LADDRIM;
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/* Wait for WDATAREADY */
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while ((EFM32_MSC_STATUS & EFM32_MSC_STATUS_WDATAREADY) == 0);
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EFM32_MSC_WDATA = src[i];
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EFM32_MSC_WRITECMD = EFM32_MSC_WRITECMD_WRITEONCE;
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/* Wait for BUSY */
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while ((EFM32_MSC_STATUS & EFM32_MSC_STATUS_BUSY));
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}
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stub_exit(0);
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}
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