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-rw-r--r--target/linux/gemini/patches-4.14/0001-cache-patch-from-OpenWRT.patch50
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-4.14/0001-cache-patch-from-OpenWRT.patch b/target/linux/gemini/patches-4.14/0001-cache-patch-from-OpenWRT.patch
new file mode 100644
index 0000000000..4430ffee9d
--- /dev/null
+++ b/target/linux/gemini/patches-4.14/0001-cache-patch-from-OpenWRT.patch
@@ -0,0 +1,50 @@
+From 57615e112aba6ae4c831d50e769c2c102f013686 Mon Sep 17 00:00:00 2001
+From: Linus Walleij <linus.walleij@linaro.org>
+Date: Tue, 7 Jun 2016 22:53:24 +0200
+Subject: [PATCH 01/31] cache patch from OpenWRT
+
+---
+ arch/arm/mm/cache-fa.S | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/mm/cache-fa.S
++++ b/arch/arm/mm/cache-fa.S
+@@ -24,7 +24,8 @@
+ /*
+ * The size of one data cache line.
+ */
+-#define CACHE_DLINESIZE 16
++#define CACHE_DLINESIZE 16
++#define CACHE_DLINESHIFT 4
+
+ /*
+ * The total size of the data cache.
+@@ -169,7 +170,17 @@ ENTRY(fa_flush_kern_dcache_area)
+ * - start - virtual start address
+ * - end - virtual end address
+ */
++__flush_whole_dcache:
++ mcr p15, 0, r0, c7, c14, 0 @ clean/invalidate D cache
++ mov r0, #0
++ mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
++ mov pc, lr
++
+ fa_dma_inv_range:
++ sub r3, r1, r0 @ calculate total size
++ cmp r3, #CACHE_DLIMIT @ total size >= limit?
++ bhs __flush_whole_dcache @ flush whole D cache
++
+ tst r0, #CACHE_DLINESIZE - 1
+ bic r0, r0, #CACHE_DLINESIZE - 1
+ mcrne p15, 0, r0, c7, c14, 1 @ clean & invalidate D entry
+@@ -193,6 +204,10 @@ fa_dma_inv_range:
+ * - end - virtual end address
+ */
+ fa_dma_clean_range:
++ sub r3, r1, r0 @ calculate total size
++ cmp r3, #CACHE_DLIMIT @ total size >= limit?
++ bhs __flush_whole_dcache @ flush whole D cache
++
+ bic r0, r0, #CACHE_DLINESIZE - 1
+ 1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry
+ add r0, r0, #CACHE_DLINESIZE