flash_init 完成初始化部分，这里的主要目的是检验flash 的型号是否正确。
int flash_erase (flash_info_t *info, int s_first, int s_last)
{
volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]);
int flag, prot, sect, l_sect;
//ulong start, now, last;
u32 targetAddr;
u32 targetSize;
/*zyy note:It is required and can't be omitted*/
rNCACHBE0=( (0x2000000>>12)<<16 )|(0>>12); //flash area(Bank0) must be non-cachable
area.
rSYSCFG=rSYSCFG & (~0x8); //write buffer has to be off for proper timing.
if ((s_first < 0) || (s_first > s_last)) {
if (info->flash_id == FLASH_UNKNOWN) {
printf ("- missing\n");
} else {
printf ("- no sectors to erase\n");
}
return 1;
}
if ((info->flash_id == FLASH_UNKNOWN) ||
(info->flash_id > FLASH_AMD_COMP)) {
printf ("Can't erase unknown flash type - aborted\n");
return 1;
}
prot = 0;
for (sect=s_first; sect<=s_last; ++sect) {
if (info->protect[sect]) {
prot++;
}
}
if (prot) {
printf ("- Warning: %d protected sectors will not be erased!\n",
prot);
} else {
printf ("\n");
}
l_sect = -1;
/* Disable interrupts which might cause a timeout here */
flag = disable_interrupts();
/* Start erase on unprotected sectors */
for (sect = s_first; sect<=s_last; sect++) {
if (info->protect[sect] == 0) {/* not protected */
targetAddr=0x10000*sect;
if(targetAddr<0x1F0000)
targetSize=0x10000;
else if(targetAddr<0x1F8000)
targetSize=0x8000;
else if(targetAddr<0x1FC000)
targetSize=0x2000;
else
targetSize=0x4000;
F29LV160_EraseSector(targetAddr);
l_sect = sect;
if(!BlankCheck(targetAddr, targetSize))
printf("BlankCheck Error\n");
}
}
1 2 3 4 5 6 7