max80_fw/fw/romcopy.c

#include "fw.h"
#include "io.h"

extern const char __dram_init_start[], __dram_init_end[], __dram_init_len[];
extern const char __dram_bss_start[], __dram_bss_end[], __dram_bss_len[];

uint32_t romcopy_time[2];
IRQHANDLER(romcopy)
{
    static unsigned int romcopy_state;

    switch (romcopy_state++) {
    case 0:
	/* Copy testdata */
	ROMCOPY_RAMADDR = (size_t)__dram_init_start;
	ROMCOPY_ROMADDR = __rom_offset;
	ROMCOPY_DATALEN = (size_t)__dram_init_len;
	break;
    case 1:
	/* Zero .dram.bss */
	romcopy_time[0] = rdtime() - time_zero;

	ROMCOPY_RAMADDR = (size_t)__dram_bss_start;
	ROMCOPY_ROMADDR = 0;	/* Clear */
	ROMCOPY_DATALEN = (size_t)__dram_bss_len;
	break;
    default:
	romcopy_time[1] = rdtime() - romcopy_time[0];
	mask_irq(ROMCOPY_IRQ);
	return;
    }
}