* The "icache enable" cause the linux crash
@ 2006-12-05 8:18 陈希
0 siblings, 0 replies; 2+ messages in thread
From: 陈希 @ 2006-12-05 8:18 UTC (permalink / raw)
To: linuxppc-dev
Hi,
I use Uboot to boot the linux. The console display "transferring
control to linux..." and the LED1 is lighting. The linux crash at this.
When I port the Uboot to my board(MPC885), I meet the similar problem. I
must disable icache in board_init_f() then the uboot can run in ram.
I delete line 2 and line 5 , it is worse. Both of LEDs are not light. Could
you tell me why.
initial_mmu:
.
.
.
/* Since the cache is enabled according to the information we
* just loaded into the TLB, invalidate and enable the caches here.
* We should probably check/set other modes....later.
*/
////////////////////////////////
Light the LED1
///////////////////////////////
1 lis r8, IDC_INVALL@h
2 mtspr IC_CST, r8
3 mtspr DC_CST, r8
4 lis r8, IDC_ENABLE@h
5 mtspr IC_CST, r8
#ifdef CONFIG_8xx_COPYBACK
mtspr DC_CST, r8
#else
/* For a debug option, I left this here to easily enable
* the write through cache mode
*/
lis r8, DC_SFWT@h
mtspr DC_CST, r8
lis r8, IDC_ENABLE@h
mtspr DC_CST, r8
#endif
////////////////////////////////
Light the LED2
///////////////////////////////
^ permalink raw reply [flat|nested] 2+ messages in thread
* The "icache enable" cause the linux crash
@ 2006-12-05 8:36 陈希
0 siblings, 0 replies; 2+ messages in thread
From: 陈希 @ 2006-12-05 8:36 UTC (permalink / raw)
To: linuxppc-dev
Hi,
I use Uboot to boot the linux. The console display "transferring
control to linux..." and the LED1 is lighting. The linux crash at this.
When I port the Uboot to my board(MPC885), I meet the similar problem. I
must disable icache in board_init_f() then the uboot can run in ram.
I delete line 2 and line 5 , it is worse. Both of LEDs are not light. Could
you tell me why.
initial_mmu:
.
.
.
/* Since the cache is enabled according to the information we
* just loaded into the TLB, invalidate and enable the caches here.
* We should probably check/set other modes....later.
*/
////////////////////////////////
Light the LED1
///////////////////////////////
1 lis r8, IDC_INVALL@h
2 mtspr IC_CST, r8
3 mtspr DC_CST, r8
4 lis r8, IDC_ENABLE@h
5 mtspr IC_CST, r8
#ifdef CONFIG_8xx_COPYBACK
mtspr DC_CST, r8
#else
/* For a debug option, I left this here to easily enable
* the write through cache mode
*/
lis r8, DC_SFWT@h
mtspr DC_CST, r8
lis r8, IDC_ENABLE@h
mtspr DC_CST, r8
#endif
////////////////////////////////
Light the LED2
///////////////////////////////
^ permalink raw reply [flat|nested] 2+ messages in thread
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