diff options
Diffstat (limited to 'packages/linux/linux-omap2-git/beagleboard/l2-cache-check.patch')
| -rw-r--r-- | packages/linux/linux-omap2-git/beagleboard/l2-cache-check.patch | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/packages/linux/linux-omap2-git/beagleboard/l2-cache-check.patch b/packages/linux/linux-omap2-git/beagleboard/l2-cache-check.patch deleted file mode 100644 index d81f03880c..0000000000 --- a/packages/linux/linux-omap2-git/beagleboard/l2-cache-check.patch +++ /dev/null @@ -1,45 +0,0 @@ -Content-Type: text/plain; charset=ISO-8859-1; format=flowed -Content-Transfer-Encoding: 7bit - - -Enabling L2 cache of Cortex-A8 based OMAP3 has to be done by -bootloader. Check if this is done and warn if not. - -Signed-off-by: Dirk Behme <dirk.behme@gmail.com> - ----- - -Changes in v2: Fix a typo. - -Index: linux-beagle/arch/arm/mach-omap2/id.c -=================================================================== ---- linux-beagle.orig/arch/arm/mach-omap2/id.c -+++ linux-beagle/arch/arm/mach-omap2/id.c -@@ -267,3 +267,26 @@ void __init omap2_check_revision(void) - - } - -+#ifdef CONFIG_ARCH_OMAP3 -+/* -+ * OMAP3 has L2 cache which has to be enabled by bootloader. -+ */ -+static int __init omap3_check_l2cache(void) -+{ -+ u32 val; -+ -+ /* Get CP15 AUX register, bit 1 enabled indicates L2 cache is on */ -+ asm volatile("mrc p15, 0, %0, c1, c0, 1":"=r" (val)); -+ -+ if ((val & 0x2) == 0) { -+ printk(KERN_WARNING "Warning: L2 cache not enabled. Check " -+ "your bootloader. L2 off results in performance loss\n"); -+ } else { -+ pr_info("OMAP3 L2 cache enabled"); -+ } -+ -+ return 0; -+} -+ -+arch_initcall(omap3_check_l2cache); -+#endif /* CONFIG_ARCH_OMAP3 */ - |