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7450 and 86xx L2 cache invalidate bug corrections

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The 7610 and related parts have an L2IP bit in the L2CR that is
monitored to signal when the L2 cache invalidate is complete whereas the
7450 and related parts utilize L2I for this purpose. However, the
current code does not account for this difference. Additionally the 86xx
L2 cache invalidate code used an "andi" instruction where an "andis"
instruction should have been used.

This patch addresses both of these bugs.

Signed-off-by: Travis Wheatley <travis.wheatley@freescale.com>
Acked-By: Jon Loeliger <jdl@freescale.com>
This commit is contained in:
Wheatley Travis 2008-05-02 13:35:15 -07:00 committed by Wolfgang Denk
parent 4d31cdc45d
commit f5a2425919
2 changed files with 21 additions and 2 deletions
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21
cpu/74xx_7xx/cache.S
View file

@ -329,14 +329,28 @@ _GLOBAL(dcache_status)
blr
/*
* Invalidate L2 cache using L2I and polling L2IP
* Invalidate L2 cache using L2I and polling L2IP or L2I
*/
_GLOBAL(l2cache_invalidate)
sync
mfspr r3, l2cr
oris r3, r3, L2CR_L2I@h
sync
mtspr l2cr, r3
sync
mfspr r3, PVR
sync
rlwinm r3, r3, 16,16,31
cmpli 0,r3,0x8000 /* 7451, 7441 */
beq 0,inv_7450
cmpli 0,r3,0x8001 /* 7455, 7445 */
beq 0,inv_7450
cmpli 0,r3,0x8002 /* 7457, 7447 */
beq 0,inv_7450
cmpli 0,r3,0x8003 /* 7447A */
beq 0,inv_7450
cmpli 0,r3,0x8004 /* 7448 */
beq 0,inv_7450
invl2:
mfspr r3, l2cr
andi. r3, r3, L2CR_L2IP
@ -348,6 +362,11 @@ invl2:
mtspr l2cr, r3
sync
blr
inv_7450:
mfspr r3, l2cr
andis. r3, r3, L2CR_L2I@h
bne inv_7450
blr
/*
* Enable L2 cache

2
cpu/mpc86xx/cache.S
View file

@ -338,7 +338,7 @@ _GLOBAL(l2cache_invalidate)
invl2:
mfspr r3, l2cr
andi. r3, r3, L2CR_L2I@h
andis. r3, r3, L2CR_L2I@h
bne invl2
blr