diff options
Diffstat (limited to 'firmware/microblaze/usrp2p/bootloader/init_bootloader.c')
| -rw-r--r-- | firmware/microblaze/usrp2p/bootloader/init_bootloader.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/firmware/microblaze/usrp2p/bootloader/init_bootloader.c b/firmware/microblaze/usrp2p/bootloader/init_bootloader.c new file mode 100644 index 000000000..15d719d73 --- /dev/null +++ b/firmware/microblaze/usrp2p/bootloader/init_bootloader.c @@ -0,0 +1,108 @@ +/* -*- c++ -*- */ +/* + * Copyright 2010 Ettus Research LLC + * + */ + +#include <memory_map.h> +#include <nonstdio.h> +#include <hal_io.h> +#include <xilinx_s3_icap.h> +#include <spi_flash.h> +#include <spi_flash_private.h> +//#include <clocks.h> +#include <ihex.h> +#include <bootloader_utils.h> +#include <string.h> +#include <hal_uart.h> + +void pic_interrupt_handler() __attribute__ ((interrupt_handler)); + +void pic_interrupt_handler() +{ + // nop stub +} + +void load_ihex(void) { //simple IHEX parser to load proper records into RAM. loads program when it receives end of record. + char buf[128]; //input data buffer + uint8_t ihx[32]; //ihex data buffer + + ihex_record_t ihex_record; + ihex_record.data = ihx; + + while(1) { + gets(buf); + + if(!ihex_parse(buf, &ihex_record)) { //RAM data record is valid + if(ihex_record.addr >= RAM_BASE) { //it's expecting to see FULLY RELOCATED IHX RECORDS. every address referenced to 0x8000, including vectors. + memcpy((void *) (ihex_record.addr), ihex_record.data, ihex_record.length); + puts("OK"); + } else if(ihex_record.type == 1) { //end of record + puts("OK"); + //load main firmware + start_program(RAM_BASE); + puts("ERROR: main image returned! Back in IHEX load mode."); + } else puts("NOK"); //RAM loads do not support extended segment address records (04) -- upper 16 bits are always "0". + } else puts("NOK"); + } +} + +void delay(uint32_t t) { + while(t-- != 0) asm("NOP"); +} + +//let's clean up this logic. state machine? no, you only have to go through it once. + +//don't need else cases since all these are terminal cases + +int main(int argc, char *argv[]) { + hal_disable_ints(); // In case we got here via jmp 0x0 + output_regs->leds = 0xFF; + delay(500000); + output_regs->leds = 0x00; + hal_uart_init(); + spif_init(); +// i2c_init(); //for EEPROM + puts("USRP2+ bootloader\n"); + + if(BUTTON_PUSHED) { //see memory_map.h + puts("Starting USRP2+ in safe mode."); + if(is_valid_fw_image(SAFE_FW_IMAGE_LOCATION_ADDR)) { + spi_flash_read(SAFE_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE); + start_program(RAM_BASE); + puts("ERROR: return from main program! This should never happen!"); + //icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR); + } else { + puts("ERROR: no safe firmware image available. I am a brick. Feel free to load IHEX to RAM."); + load_ihex(); + } + } + + puts("Checking for valid production FPGA image..."); + if(is_valid_fpga_image(PROD_FPGA_IMAGE_LOCATION_ADDR)) { + puts("Valid production FPGA image found. Attempting to boot."); + //icap_reload_fpga(PROD_FPGA_IMAGE_LOCATION_ADDR); + } + puts("No valid production FPGA image found.\nAttempting to load production firmware..."); + if(is_valid_fw_image(PROD_FW_IMAGE_LOCATION_ADDR)) { + puts("Valid production firmware found. Loading..."); + spi_flash_read(PROD_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE); + start_program(RAM_BASE); + puts("ERROR: Return from main program! This should never happen!"); + //if this happens, though, the safest thing to do is reboot the whole FPGA and start over. + //icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR); + return 1; + } + puts("No valid production firmware found. Trying safe firmware..."); + if(is_valid_fw_image(SAFE_FW_IMAGE_LOCATION_ADDR)) { + spi_flash_read(SAFE_FW_IMAGE_LOCATION_ADDR, FW_IMAGE_SIZE_BYTES, (void *)RAM_BASE); + start_program(RAM_BASE); + puts("ERROR: return from main program! This should never happen!"); + //icap_reload_fpga(SAFE_FPGA_IMAGE_LOCATION_ADDR); + return 1; //_exit will trap in loop + } + puts("ERROR: no safe firmware image available. I am a brick. Feel free to load IHEX to RAM."); + load_ihex(); + + return 0; +} |