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/* -*- c++ -*- */
/*
* Copyright 2010 Ettus Research LLC
*
*/
//contains routines for loading programs from Flash. depends on Flash libraries.
//also contains routines for reading / writing EEPROM flags for the bootloader
#include <stdbool.h>
#include <string.h>
#include <bootloader_utils.h>
#include <spi_flash.h>
#include <memory_map.h>
#include <nonstdio.h>
int is_valid_fpga_image(uint32_t addr) {
// printf("is_valid_fpga_image(): starting with addr=%x...\n", addr);
uint8_t imgbuf[64];
spi_flash_read(addr, 64, imgbuf);
//we're just looking for leading 0xFF padding, followed by the sync bytes 0xAA 0x99
for(size_t i = 0; i<63; i++) {
if(imgbuf[i] == 0xFF) continue;
if(imgbuf[i] == 0xAA && imgbuf[i+1] == 0x99) {
//printf("is_valid_fpga_image(): found valid FPGA image\n");
return 1;
}
}
return 0;
}
int is_valid_fw_image(uint32_t addr) {
static const uint8_t fwheader[] = {0x0b, 0x0b, 0x0b, 0x0b, 0x80, 0x70}; //just lookin for a jump to anywhere located at the reset vector
//printf("is_valid_fw_image(): starting with addr=%x...\n", addr);
uint8_t buf[12];
spi_flash_read(addr, 6, buf);
//printf("is_valid_fw_image(): read ");
//for(int i = 0; i < 5; i++) printf("%x ", buf[i]);
//printf("\n");
return memcmp(buf, fwheader, 6) == 0;
}
void start_program(void)
{
//ignoring the addr now
//all this does is tap that register
*((volatile uint32_t *) SR_ADDR_BLDRDONE) = 1;
}
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