mirror of
https://git.yoctoproject.org/meta-ti
synced 2026-07-17 06:48:07 +00:00
Koen Kooi
49 lines
1.4 KiB
Diff
49 lines
1.4 KiB
Diff
From 2f716593e3f11859bf98c997183c47587c2dba76 Mon Sep 17 00:00:00 2001
|
|
From: Mans Rullgard <mans@mansr.com>
|
|
Date: Tue, 10 Nov 2009 00:41:54 +0000
|
|
Subject: [PATCH 39/45] ARM: Add option to allow userspace PLE access
|
|
|
|
This adds a Kconfig option to allow userspace to access the L2 preload
|
|
engine (PLE) found in Cortex-A8.
|
|
|
|
Signed-off-by: Mans Rullgard <mans@mansr.com>
|
|
---
|
|
arch/arm/kernel/head.S | 4 ++++
|
|
arch/arm/mm/Kconfig | 8 ++++++++
|
|
2 files changed, 12 insertions(+), 0 deletions(-)
|
|
|
|
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
|
|
index eb62bf9..659ec9e 100644
|
|
--- a/arch/arm/kernel/head.S
|
|
+++ b/arch/arm/kernel/head.S
|
|
@@ -172,6 +172,10 @@ __enable_mmu:
|
|
#ifdef CONFIG_CPU_ICACHE_DISABLE
|
|
bic r0, r0, #CR_I
|
|
#endif
|
|
+#ifdef CONFIG_USER_L2_PLE
|
|
+ mov r5, #3
|
|
+ mcr p15, 0, r5, c11, c1, 0
|
|
+#endif
|
|
mov r5, #(domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
|
|
domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
|
|
domain_val(DOMAIN_TABLE, DOMAIN_MANAGER) | \
|
|
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
|
|
index dd4698c..564ff7d 100644
|
|
--- a/arch/arm/mm/Kconfig
|
|
+++ b/arch/arm/mm/Kconfig
|
|
@@ -785,3 +785,11 @@ config ARM_L1_CACHE_SHIFT
|
|
int
|
|
default 6 if ARCH_OMAP3 || ARCH_S5PC1XX
|
|
default 5
|
|
+
|
|
+config USER_L2_PLE
|
|
+ bool "Enable userspace access to the L2 PLE"
|
|
+ depends on CPU_V7
|
|
+ default n
|
|
+ help
|
|
+ Enable userspace access to the L2 preload engine (PLE) available
|
|
+ in Cortex-A series ARM processors.
|
|
--
|
|
1.6.6.1
|
|
|