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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>
int is_valid_fpga_image(uint32_t 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
int i = 0;
for(i; i<63; i++) {
if(imgbuf[i] == 0xFF) continue;
if(imgbuf[i] == 0xAA && imgbuf[i+1] == 0x99) return 1;
}
return 0;
}
int is_valid_fw_image(uint32_t addr) {
static const uint8_t fwheader[] = {0xB0, 0x00, 0x00, 0x00, 0xB8, 0x08}; //just lookin for a jump to anywhere located at the reset vector
uint8_t buf[12];
spi_flash_read(addr, 6, buf);
return memcmp(buf, fwheader, 6) == 0;
}
void start_program(uint32_t addr)
{
memcpy(0x00000000, addr+0x00000000, 36); //copy the whole vector table, with the reset vector, into boot RAM
typedef void (*fptr_t)(void);
(*(fptr_t) 0x00000000)(); // most likely no return
}
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