The code is as followed. When i delete TLB entry 1 configuration code, the program can run normally!! Why?:confounded_face:
__asm void MMUTLB_init(void)
{
/*configure TLB entry 1,start from 0x0000 8000,4MB*/
lis r3, 0x1001 /* Select TLB entry 1, define R/W replacment control */
ori r3, r3, 0x0000 /* clear the low 16bits of r3*/
mtMAS0 r3 /* Load MAS0 with 0x1001 0000 for TLB entry 1*/
lis r3, 0xC000 /* Define description context and configuration control: */
ori r3, r3, 0x0600 /* VALID=1, IPROT=1, TID=0, TS=0, TSIZE=0110 (4MB size) */
mtMAS1 r3 /* Load MAS 1 with 0x8000 0600 */
lis r3, 0x0000 /* Define EPN and page attributes: */
ori r3, r3, 0x8000 /* VLE=0*/
mtMAS2 r3 /* EPN = 0x0000 8000, WIMAGE = all 0's */
/* Load MAS2 with 0x0000 8000 */
lis r3, 0x0000 /* Define RPN and access control for data R/W */
ori r3, r3, 0x803F /* RPN = 0x0000 0000, U0:3=0, UX/SX=1, UR/SR/UW/SW=1 */
mtMAS3 r3 /* Load MAS3 with 0x0000 800F */
tlbwe /*load the TLB entry*/
/*configure TLB entry 6,0x0000 4000-0x0000 8000*/
lis r3, 0x1006 /* Select TLB entry 6, define R/W replacment control */
ori r3, r3, 0x0000 /*clear the low 16bits of r3*/
mtMAS0 r3 /* Load MAS0 with 0x1006 0000 for TLB entry 1*/
lis r3, 0xC000 /* Define description context and configuration control: */
ori r3, r3, 0x0200 /* VALID=1, IPROT=0, TID=0, TS=0, TSIZE=0010 (16KB size) */
mtMAS1 r3 /* Load MAS 1 with 0x8000 0200 */
lis r3, 0x0000 /* Define EPN and page attributes: */
ori r3, r3, 0x4000 /* EPN = 0x0000 4000, WIMAGE = all 0's */
mtMAS2 r3 /* Load MAS2 with 0x0000 4000 */
lis r3, 0x0000 /* Define RPN and access control for data R/W */
ori r3, r3, 0x403F /* RPN = 0x0000 4000, U0:3=0, UX/SX=0, UR/SR/UW/SW=1 */
mtMAS3 r3 /* Load MAS3 with 0x0000 400F */
tlbwe /*load the TLB entry*/
/*configure TLB entry 7,0x0000 0000-0x00004000*/
lis r3, 0x1007 /* Select TLB entry 7, define R/W replacment control */
ori r3, r3, 0x0000 /*clear the low 16bits of r3*/
mtMAS0 r3 /* Load MAS0 with 0x1007 0000 for TLB entry 1*/
lis r3, 0xC000 /* Define description context and configuration control: */
ori r3, r3, 0x0200 /* VALID=1, IPROT=0, TID=0, TS=0, TSIZE=0010 (16KB size) */
mtMAS1 r3 /* Load MAS 1 with 0xC000 0200 */
lis r3, 0x0000 /* Define EPN and page attributes: */
ori r3, r3, 0x0000 /* EPN = 0x0000 0000, WIMAGE = all 0's */
mtMAS2 r3 /* Load MAS2 with 0x0000 0000 */
lis r3, 0x0000 /* Define RPN and access control for data R/W */
ori r3, r3, 0x003F /* RPN = 0x0000 0000, U0:3=0, UX/SX=0, UR/SR/UW/SW=1 */
mtMAS3 r3 /* Load MAS3 with 0x0000 000F */
tlbwe /*load the TLB entry*/
}
after debug, i found the TLB1 entry0 has been changed, but code don't change it.
