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/* -*- c++ -*- */
/*
* Copyright 2010 Ettus Research LLC
*
*/
//contains routines for loading programs from Flash. depends on Flash libraries.
#include <string.h>
#include <bootloader_utils.h>
#include <spi_flash.h>
int is_valid_fpga_image(uint32_t addr) {
static const uint8_t fpgaheader[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xAA, 0x99}; //AA 99 is the standard Xilinx sync sequence, and it's always prefixed with 0xFF padding
uint8_t buf[10];
spi_flash_read(addr, 6, buf);
return memcmp(buf, fpgaheader, 6) == 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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