bcm53xx: drop linux 4.4 and 4.9 support

[openwrt/openwrt.git] / target / linux / bcm53xx / patches-4.9 / 300-ARM-BCM5301X-Disable-MMU-and-Dcache-during-decompres.patch

diff --git a/target/linux/bcm53xx/patches-4.9/300-ARM-BCM5301X-Disable-MMU-and-Dcache-during-decompres.patch b/target/linux/bcm53xx/patches-4.9/300-ARM-BCM5301X-Disable-MMU-and-Dcache-during-decompres.patch
deleted file mode 100644 (file)
index 1c73775..0000000
--- a/target/linux/bcm53xx/patches-4.9/300-ARM-BCM5301X-Disable-MMU-and-Dcache-during-decompres.patch
+++ /dev/null
@@ -1,101 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Wed, 24 Sep 2014 22:14:07 +0200
-Subject: [PATCH] ARM: BCM5301X: Disable MMU and Dcache during decompression
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-Broadcom devices have broken CFE (bootloader) that leaves hardware in an
-invalid state. It causes problems with booting Linux. On Northstar
-devices kernel was randomly hanging in ~25% of tries during early init.
-Hangs used to happen at random places in the start_kernel. On BCM53573
-kernel doesn't even seem to start booting.
-
-To workaround this problem we need to do following very early:
-1) Clear 2 following bits in the SCTLR register:
-#define CR_M    (1 << 0)        /* MMU enable */
-#define CR_C    (1 << 2)        /* Dcache enable */
-2) Flush the whole D-cache
-3) Disable L2 cache
-
-Unfortunately this patch is not upstreamable as it does above things
-unconditionally. We can't check if we are running on Broadcom platform
-in any safe way and doing such hacks with ARCH_MULTI_V7 is unacceptable
-as it could break other devices support.
-
-Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
----
-
---- a/arch/arm/boot/compressed/Makefile
-+++ b/arch/arm/boot/compressed/Makefile
-@@ -31,6 +31,11 @@ ifeq ($(CONFIG_ARCH_ACORN),y)
- OBJS          += ll_char_wr.o font.o
- endif
- 
-+ifeq ($(CONFIG_ARCH_BCM_5301X),y)
-+OBJS          += head-bcm_5301x-mpcore.o
-+OBJS          += cache-v7-min.o
-+endif
-+
- ifeq ($(CONFIG_ARCH_SA1100),y)
- OBJS          += head-sa1100.o
- endif
---- /dev/null
-+++ b/arch/arm/boot/compressed/head-bcm_5301x-mpcore.S
-@@ -0,0 +1,37 @@
-+/*
-+ *
-+ * Platform specific tweaks.  This is merged into head.S by the linker.
-+ *
-+ */
-+
-+#include <linux/linkage.h>
-+#include <asm/assembler.h>
-+#include <asm/cp15.h>
-+
-+              .section        ".start", "ax"
-+
-+/*
-+ * This code section is spliced into the head code by the linker
-+ */
-+
-+__plat_uncompress_start:
-+
-+      @ Preserve r8/r7 i.e. kernel entry values
-+      mov     r12, r8
-+
-+      @ Clear MMU enable and Dcache enable bits
-+      mrc     p15, 0, r0, c1, c0, 0           @ Read SCTLR
-+      bic     r0, #CR_C|CR_M
-+      mcr     p15, 0, r0, c1, c0, 0           @ Write SCTLR
-+      nop
-+
-+      @ Call the cache invalidation routine
-+      bl      v7_flush_dcache_all
-+      nop
-+      mov     r0,#0
-+      ldr     r3, =0x19022000                 @ L2 cache controller, control reg
-+      str     r0, [r3, #0x100]                @ Disable L2 cache
-+      nop
-+
-+      @ Restore
-+      mov     r8, r12
---- a/arch/arm/boot/compressed/cache-v7-min.S
-+++ b/arch/arm/boot/compressed/cache-v7-min.S
-@@ -12,6 +12,7 @@
- 
- #include <linux/linkage.h>
- #include <linux/init.h>
-+#include <asm/assembler.h>
- 
-       __INIT
- 
-@@ -63,7 +64,7 @@ loop2:
-  ARM( orr     r11, r11, r9, lsl r2    )       @ factor index number into r11
-  THUMB(       lsl     r6, r9, r2              )
-  THUMB(       orr     r11, r11, r6            )       @ factor index number into r11
--      mcr     p15, 0, r11, c7, c14, 2         @ clean & invalidate by set/way
-+      mcr     p15, 0, r11, c7, c6, 2          @ clean & invalidate by set/way
-       subs    r9, r9, #1                      @ decrement the index
-       bge     loop2
-       subs    r4, r4, #1                      @ decrement the way