osd-contiki/core/loader/elfloader-msp430.c

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/*
* Copyright (c) 2005, Swedish Institute of Computer Science
* 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. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
*
* This file is part of the Contiki operating system.
*
*/
#include "elfloader-arch.h"
#include "dev/flash.h"
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static uint16_t datamemory_aligned[ELFLOADER_DATAMEMORY_SIZE/2+1];
static uint8_t* datamemory = (uint8_t *)datamemory_aligned;
#if ELFLOADER_CONF_TEXT_IN_ROM
static const char textmemory[ELFLOADER_TEXTMEMORY_SIZE] = {0};
#else /* ELFLOADER_CONF_TEXT_IN_ROM */
static char textmemory[ELFLOADER_TEXTMEMORY_SIZE];
#endif /* ELFLOADER_CONF_TEXT_IN_ROM */
/*---------------------------------------------------------------------------*/
void *
elfloader_arch_allocate_ram(int size)
{
return datamemory;
}
/*---------------------------------------------------------------------------*/
void *
elfloader_arch_allocate_rom(int size)
{
#if ELFLOADER_CONF_TEXT_IN_ROM
/* Return an 512-byte aligned pointer. */
return (char *)
((unsigned long)&textmemory[0] & 0xfffffe00) +
(((unsigned long)&textmemory[0] & 0x1ff) == 0? 0: 0x200);
#else /* ELFLOADER_CONF_TEXT_IN_ROM */
return textmemory;
#endif /* ELFLOADER_CONF_TEXT_IN_ROM */
}
/*---------------------------------------------------------------------------*/
#define READSIZE 32
void
elfloader_arch_write_rom(int fd, unsigned short textoff, unsigned int size, char *mem)
{
#if ELFLOADER_CONF_TEXT_IN_ROM
int i;
unsigned int ptr;
unsigned short *flashptr;
flash_setup();
flashptr = (unsigned short *)mem;
cfs_seek(fd, textoff, CFS_SEEK_SET);
for(ptr = 0; ptr < size; ptr += READSIZE) {
/* Read data from file into RAM. */
cfs_read(fd, (unsigned char *)datamemory, READSIZE);
/* Clear flash page on 512 byte boundary. */
if((((unsigned short)flashptr) & 0x01ff) == 0) {
flash_clear(flashptr);
}
/* Burn data from RAM into flash ROM. Flash is burned one 16-bit
word at a time, so we need to be careful when incrementing
pointers. The flashptr is already a short pointer, so
incrementing it by one will actually increment the address by
two. */
for(i = 0; i < READSIZE / 2; ++i) {
flash_write(flashptr, ((unsigned short *)datamemory)[i]);
++flashptr;
}
}
flash_done();
#else /* ELFLOADER_CONF_TEXT_IN_ROM */
cfs_seek(fd, textoff, CFS_SEEK_SET);
cfs_read(fd, (unsigned char *)mem, size);
#endif /* ELFLOADER_CONF_TEXT_IN_ROM */
}
/*---------------------------------------------------------------------------*/
void
elfloader_arch_relocate(int fd, unsigned int sectionoffset,
char *sectionaddr,
struct elf32_rela *rela, char *addr)
{
addr += rela->r_addend;
cfs_seek(fd, sectionoffset + rela->r_offset, CFS_SEEK_SET);
cfs_write(fd, (char *)&addr, 2);
}
/*---------------------------------------------------------------------------*/