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Generalize this for loading the loader into the SPI. Plus trim about

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100 bytes from the binary with silly tricks.  Hope to get this small
enough to run on the models that have 4k SRAM.  We are close compiled
for the at91rm9200, but still need to trim for the target.
This commit is contained in:
Warner Losh 2012-07-07 04:55:42 +00:00
parent 1d4fae3825
commit 51763c6303
1 changed files with 5 additions and 11 deletions
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16
sys/boot/arm/at91/boot0spi/main.c
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@ -29,31 +29,26 @@
#include "at91rm9200_lowlevel.h"
#include "spi_flash.h"
#define LOADER_OFFSET 0
#define FPGA_OFFSET (15 * FLASH_PAGE_SIZE)
#define OFFSET FPGA_OFFSET
#define OFFSET 0
int
void
main(void)
{
int len, i, j, off, sec;
char *addr = (char *)SDRAM_BASE + (1 << 20); /* download at + 1MB */
char *addr2 = (char *)SDRAM_BASE + (2 << 20); /* readback to + 2MB */
char *addr3 = (char *)SDRAM_BASE + (3 << 20); /* extra copy at + 3MB */
SPI_InitFlash();
printf("Waiting for data\n");
while ((len = xmodem_rx(addr)) == -1)
continue;
// Need extra copy at addr3
memcpy(addr3, addr, (len + FLASH_PAGE_SIZE - 1) / FLASH_PAGE_SIZE * FLASH_PAGE_SIZE);
printf("Writing %u bytes to flash at %u\n", len, OFFSET);
printf("Writing %u bytes at %u\n", len, OFFSET);
for (i = 0; i < len; i+= FLASH_PAGE_SIZE) {
off = i + OFFSET;
for (j = 0; j < 10; j++) {
off = i + OFFSET;
SPI_WriteFlash(off, addr + i, FLASH_PAGE_SIZE);
SPI_ReadFlash(off, addr2 + i, FLASH_PAGE_SIZE);
if (p_memcmp(addr3 + i, addr2 + i, FLASH_PAGE_SIZE) == 0)
if (p_memcmp(addr + i, addr2 + i, FLASH_PAGE_SIZE) == 0)
break;
}
if (j >= 10)
@ -64,5 +59,4 @@ main(void)
continue;
printf("Done\n");
reset();
return (1);
}