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Quick and dirty implementations of rom and xmem.

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bg- 2007-02-02 14:08:22 +00:00
parent b1dde63655
commit 9eeec32610
2 changed files with 219 additions and 0 deletions
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127
platform/cc2420dbk/dev/rom.c Normal file
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/*
* Copyright (c) 2007, 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.
*
* @(#)$Id: rom.c,v 1.1 2007/02/02 14:08:22 bg- Exp $
*/
#include <stdio.h>
#include <avr/boot.h>
#include <avr/pgmspace.h>
#include "contiki.h"
#include "lib/assert.h"
#include "dev/rom.h"
#if 0
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...) do {} while (0)
#endif
BOOTLOADER_SECTION
int
rom_erase(long nbytes, off_t offset)
{
long nb = nbytes;
if(nbytes % ROM_ERASE_UNIT_SIZE != 0) {
return -1;
}
if(offset % ROM_ERASE_UNIT_SIZE != 0) {
return -1;
}
PRINTF("rom_erase(%ld, %06lx)\n", nbytes, offset);
while (nbytes > 0) {
spl_t s = splhigh();
eeprom_busy_wait();
boot_page_erase(offset);
boot_spm_busy_wait();
boot_rww_enable(); /* Before return or intr. */
splx(s);
nbytes -= ROM_ERASE_UNIT_SIZE;
offset += ROM_ERASE_UNIT_SIZE;
}
return nb;
}
int
rom_pread(void *buf, int nbytes, off_t offset)
{
PRINTF("rom_pread(%p, %d, %06lx)\n", buf, nbytes, offset);
assert(offset == (uintptr_t)offset);
assert((offset + nbytes) == (uintptr_t)(offset + nbytes));
memcpy_P(buf, (PGM_P)(uintptr_t)offset, nbytes);
return nbytes;
}
BOOTLOADER_SECTION
int
rom_pwrite(const void *buf, int nbytes, off_t offset)
{
long nb = nbytes;
const unsigned char *from = buf;
PRINTF("rom_pwrite(%p, %d, %06lx)\n", buf, nbytes, offset);
while(nbytes > 0) {
int i, n = (nbytes > ROM_ERASE_UNIT_SIZE) ? ROM_ERASE_UNIT_SIZE : nbytes;
spl_t s = splhigh();
eeprom_busy_wait();
for (i = 0; i < n; i += 2) {
uint16_t w = *from++;
w |= (*from++) << 8;
boot_page_fill(offset + i, w);
}
boot_page_write(offset);
boot_spm_busy_wait();
boot_rww_enable(); /* Before return or intr. */
splx(s);
nbytes -= ROM_ERASE_UNIT_SIZE;
offset += ROM_ERASE_UNIT_SIZE;
}
return nb;
}

92
platform/cc2420dbk/dev/xmem.c Normal file
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/*
* Copyright (c) 2007, 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.
*
* @(#)$Id: xmem.c,v 1.1 2007/02/02 14:08:22 bg- Exp $
*/
/*
* External memory built from the AVR eeprom. It is incredibly slow!
*/
#include <stdio.h>
#include <avr/eeprom.h>
#include "contiki.h"
#include "dev/xmem.h"
#if 0
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...) do {} while (0)
#endif
/*
*/
void
xmem_init(void)
{
PRINTF("xmem_init\n");
}
int
xmem_pread(void *_p, int size, off_t offset)
{
PRINTF("xmem_pread(%p, %d, %06lx)\n", _p, size, offset);
spl_t s = splhigh();
eeprom_busy_wait();
eeprom_read_block(_p, (void *)(uintptr_t)offset, size);
splx(s);
return size;
}
int
xmem_pwrite(const void *_p, int size, off_t offset)
{
PRINTF("xmem_pwrite(%p, %d, %06lx)\n", _p, size, offset);
spl_t s = splhigh();
eeprom_busy_wait();
eeprom_write_block(_p, (void *)(uintptr_t)offset, size);
splx(s);
return size;
}
int
xmem_erase(long size, off_t offset)
{
/*
* AVR internal eeprom has a kind of auto erase, thus nothing is
* done here.
*/
PRINTF("xmem_erase(%ld, %06lx)\n", size, offset);
return size;
}