brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-07-05 02:36:39 +09:00
Code Issues Projects Releases Wiki Activity

ARMV7: OMAP3: Fix and clean up L2 cache enable/disable functions

Browse Source 
On OMAP34xx ES1.0, the L2 enable bit can only be set in secure mode,
so an SMC call to the ROM monitor is required.  On later versions,
and on newer devices, this bit is banked and we can set it directly.

The code checked only the ES revision of the chip, and hence incorrectly
used the ROM call on ES1.0 versions of other devices.

This patch adds a check for chip family as well as revision, and also
removes some code duplication between the enable and disable functions.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Mans Rullgard 2010-04-14 11:08:00 +01:00 committed by Sandeep Paulraj
parent 7c281c985c
commit 2984470746
1 changed files with 24 additions and 57 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
arch/arm/cpu/armv7/omap3/cache.S
View File

@ -128,64 +128,31 @@ finished_inval:
ldmfd r13!, {r0 - r5, r7, r9 - r12, pc}
l2_cache_enable:
stmfd r13!, {r0, r1, r2, lr}
@ ES2 onwards we can disable/enable L2 ourselves
l2_cache_set:
stmfd r13!, {r4 - r6, lr}
mov r5, r0
bl get_cpu_rev
cmp r0, #CPU_3XX_ES20
blt l2_cache_disable_EARLIER_THAN_ES2
mrc 15, 0, r3, cr1, cr0, 1
orr r3, r3, #2
mcr 15, 0, r3, cr1, cr0, 1
b l2_cache_enable_END
l2_cache_enable_EARLIER_THAN_ES2:
@ Save r0, r12 and restore them after usage
mov r3, ip
str r3, [sp, #4]
mov r3, r0
@
@ GP Device ROM code API usage here
@ r12 = AUXCR Write function and r0 value
@
mov ip, #3
mrc 15, 0, r0, cr1, cr0, 1
orr r0, r0, #2
@ SMI instruction to call ROM Code API
.word 0xe1600070
mov r0, r3
mov ip, r3
str r3, [sp, #4]
l2_cache_enable_END:
ldmfd r13!, {r1, r2, r3, pc}
l2_cache_disable:
stmfd r13!, {r0, r1, r2, lr}
mov r4, r0
bl get_cpu_family
@ ES2 onwards we can disable/enable L2 ourselves
bl get_cpu_rev
cmp r0, #CPU_3XX_ES20
blt l2_cache_disable_EARLIER_THAN_ES2
mrc 15, 0, r3, cr1, cr0, 1
bic r3, r3, #2
mcr 15, 0, r3, cr1, cr0, 1
b l2_cache_disable_END
l2_cache_disable_EARLIER_THAN_ES2:
@ Save r0, r12 and restore them after usage
mov r3, ip
str r3, [sp, #4]
mov r3, r0
@
@ GP Device ROM code API usage here
@ r12 = AUXCR Write function and r0 value
@
mov ip, #3
cmp r0, #CPU_OMAP34XX
cmpeq r4, #CPU_3XX_ES10
mrc 15, 0, r0, cr1, cr0, 1
bic r0, r0, #2
@ SMI instruction to call ROM Code API
.word 0xe1600070
mov r0, r3
mov ip, r3
str r3, [sp, #4]
l2_cache_disable_END:
ldmfd r13!, {r1, r2, r3, pc}
orr r0, r0, r5, lsl #1
mcreq 15, 0, r0, cr1, cr0, 1
@ GP Device ROM code API usage here
@ r12 = AUXCR Write function and r0 value
mov ip, #3
@ SMCNE instruction to call ROM Code API
.word 0x11600070
ldmfd r13!, {r4 - r6, pc}
l2_cache_enable:
mov r0, #1
b l2_cache_set
l2_cache_disable:
mov r0, #0
b l2_cache_set