diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap-psp-2.6.32/0039-ARM-Add-option-to-allow-userspace-PLE-access.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap-psp-2.6.32/0039-ARM-Add-option-to-allow-userspace-PLE-access.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/0039-ARM-Add-option-to-allow-userspace-PLE-access.patch b/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/0039-ARM-Add-option-to-allow-userspace-PLE-access.patch new file mode 100644 index 00000000..f72c477f --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap-psp-2.6.32/0039-ARM-Add-option-to-allow-userspace-PLE-access.patch | |||
| @@ -0,0 +1,48 @@ | |||
| 1 | From 2f716593e3f11859bf98c997183c47587c2dba76 Mon Sep 17 00:00:00 2001 | ||
| 2 | From: Mans Rullgard <mans@mansr.com> | ||
| 3 | Date: Tue, 10 Nov 2009 00:41:54 +0000 | ||
| 4 | Subject: [PATCH 39/45] ARM: Add option to allow userspace PLE access | ||
| 5 | |||
| 6 | This adds a Kconfig option to allow userspace to access the L2 preload | ||
| 7 | engine (PLE) found in Cortex-A8. | ||
| 8 | |||
| 9 | Signed-off-by: Mans Rullgard <mans@mansr.com> | ||
| 10 | --- | ||
| 11 | arch/arm/kernel/head.S | 4 ++++ | ||
| 12 | arch/arm/mm/Kconfig | 8 ++++++++ | ||
| 13 | 2 files changed, 12 insertions(+), 0 deletions(-) | ||
| 14 | |||
| 15 | diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S | ||
| 16 | index eb62bf9..659ec9e 100644 | ||
| 17 | --- a/arch/arm/kernel/head.S | ||
| 18 | +++ b/arch/arm/kernel/head.S | ||
| 19 | @@ -172,6 +172,10 @@ __enable_mmu: | ||
| 20 | #ifdef CONFIG_CPU_ICACHE_DISABLE | ||
| 21 | bic r0, r0, #CR_I | ||
| 22 | #endif | ||
| 23 | +#ifdef CONFIG_USER_L2_PLE | ||
| 24 | + mov r5, #3 | ||
| 25 | + mcr p15, 0, r5, c11, c1, 0 | ||
| 26 | +#endif | ||
| 27 | mov r5, #(domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \ | ||
| 28 | domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \ | ||
| 29 | domain_val(DOMAIN_TABLE, DOMAIN_MANAGER) | \ | ||
| 30 | diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig | ||
| 31 | index dd4698c..564ff7d 100644 | ||
| 32 | --- a/arch/arm/mm/Kconfig | ||
| 33 | +++ b/arch/arm/mm/Kconfig | ||
| 34 | @@ -785,3 +785,11 @@ config ARM_L1_CACHE_SHIFT | ||
| 35 | int | ||
| 36 | default 6 if ARCH_OMAP3 || ARCH_S5PC1XX | ||
| 37 | default 5 | ||
| 38 | + | ||
| 39 | +config USER_L2_PLE | ||
| 40 | + bool "Enable userspace access to the L2 PLE" | ||
| 41 | + depends on CPU_V7 | ||
| 42 | + default n | ||
| 43 | + help | ||
| 44 | + Enable userspace access to the L2 preload engine (PLE) available | ||
| 45 | + in Cortex-A series ARM processors. | ||
| 46 | -- | ||
| 47 | 1.6.6.1 | ||
| 48 | |||