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From c18bda32fdb048ea38b7ff579f365ea8858053d7 Mon Sep 17 00:00:00 2001
From: Mans Rullgard <mans@mansr.com>
Date: Wed, 14 Apr 2010 12:08:00 +0100
Subject: [PATCH 28/37] OMAP3: fix and clean up L2 cache enable/disable functions
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>
---
cpu/arm_cortexa8/omap3/cache.S | 74 +++++++++++-----------------------------
1 files changed, 20 insertions(+), 54 deletions(-)
diff --git a/cpu/arm_cortexa8/omap3/cache.S b/cpu/arm_cortexa8/omap3/cache.S
index 0f63815..16afb5d 100644
--- a/cpu/arm_cortexa8/omap3/cache.S
+++ b/cpu/arm_cortexa8/omap3/cache.S
@@ -128,64 +128,30 @@ finished_inval:
ldmfd r13!, {r0 - r5, r7, r9 - r12, pc}
-
-l2_cache_enable:
- push {r0, r1, r2, lr}
- @ ES2 onwards we can disable/enable L2 ourselves
+l2_cache_set:
+ push {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
- @
+ mov r4, r0
+ bl get_cpu_family
+ @ ES2 onwards we can disable/enable L2 ourselves
+ cmp r0, #CPU_OMAP34XX
+ cmpeq r4, #CPU_3XX_ES10
+ mrc 15, 0, r0, cr1, cr0, 1
+ bic r0, r0, #2
+ 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
- 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:
- pop {r1, r2, r3, pc}
+ @ SMCNE instruction to call ROM Code API
+ .word 0x11600070
+ pop {r4-r6, pc}
+l2_cache_enable:
+ mov r0, #1
+ b l2_cache_set
l2_cache_disable:
- push {r0, r1, r2, lr}
- @ 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
- 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:
- pop {r1, r2, r3, pc}
+ mov r0, #0
+ b l2_cache_set
--
1.6.6.1
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