umon bootloader source code, support mips cpu.
源代码在线查看： flashdev.h
/* flash.h:
This header file supports the ability to use one source file to build
flash operations for 8, 16 and 32 bit width flash banks.
*/
#include "config.h"
#define FLASH_TIMEOUT 1000000
#define FLASHFUNCSIZE 400
/* Manufacturer and device ids... */
#define AMD29DL640D 0x017e
#define WIDTH 1
#define ftype volatile unsigned char
#define Write_aa_to_aaa() (*(ftype *)(fdev->base+0xaaa) = 0xaa)
#define Write_55_to_555() (*(ftype *)(fdev->base+0x555) = 0x55)
#define Write_80_to_aaa() (*(ftype *)(fdev->base+0xaaa) = 0x80)
#define Write_a0_to_aaa() (*(ftype *)(fdev->base+0xaaa) = 0xa0)
#define Write_90_to_aaa() (*(ftype *)(fdev->base+0xaaa) = 0x90)
#define Write_f0_to_base() (*(ftype *)(fdev->base) = 0xf0)
#define Write_30_to_(add) (*(ftype *)add = 0x30)
#define Read_0000() (*(ftype *)(fdev->base))
#define Read_0001() (*(ftype *)(fdev->base+1))
#define Read_0002() (*(ftype *)(fdev->base+2))
#define Read_555() (*(ftype *)(fdev->base+0x555))
#define Is_ff(add) (*(ftype *)add == 0xff)
#define Is_not_ff(add) (*(ftype *)add != 0xff)
#define D5_Timeout(add) ((*(ftype *)add & 0xdf) == 0x20)
#define Fwrite(to,frm) (*(ftype *)to = *(ftype *)frm)
#define Is_Equal(p1,p2) (*(ftype *)p1 == *(ftype *)p2)
#define Is_Not_Equal(p1,p2) (*(ftype *)p1 != *(ftype *)p2)
