diff options
Diffstat (limited to 'target/linux/generic/patches-4.9/222-arm_zimage_none.patch')
| -rw-r--r-- | target/linux/generic/patches-4.9/222-arm_zimage_none.patch | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/target/linux/generic/patches-4.9/222-arm_zimage_none.patch b/target/linux/generic/patches-4.9/222-arm_zimage_none.patch new file mode 100644 index 0000000..8de9851 --- /dev/null +++ b/target/linux/generic/patches-4.9/222-arm_zimage_none.patch @@ -0,0 +1,124 @@ +ARM: implement "uncompressed zImage" + +Based on RFC patch by Uwe Kleine-König +http://www.spinics.net/lists/arm-kernel/msg230153.html + +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- +--- a/arch/arm/boot/compressed/Makefile ++++ b/arch/arm/boot/compressed/Makefile +@@ -71,6 +71,7 @@ compress-$(CONFIG_KERNEL_LZO) = lzo + compress-$(CONFIG_KERNEL_LZMA) = lzma + compress-$(CONFIG_KERNEL_XZ) = xzkern + compress-$(CONFIG_KERNEL_LZ4) = lz4 ++compress-$(CONFIG_KERNEL_CAT) = cat + + # Borrowed libfdt files for the ATAG compatibility mode + +--- a/arch/arm/boot/compressed/decompress.c ++++ b/arch/arm/boot/compressed/decompress.c +@@ -55,6 +55,10 @@ extern char * strstr(const char * s1, co + #include "../../../../lib/decompress_unlz4.c" + #endif + ++#ifdef CONFIG_KERNEL_CAT ++#include "../../../../lib/decompress_uncat.c" ++#endif ++ + int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x)) + { + return __decompress(input, len, NULL, NULL, output, 0, NULL, error); +--- /dev/null ++++ b/arch/arm/boot/compressed/piggy.cat.S +@@ -0,0 +1,6 @@ ++ .section .piggydata,#alloc ++ .globl input_data ++input_data: ++ .incbin "arch/arm/boot/compressed/piggy.cat" ++ .globl input_data_end ++input_data_end: +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -127,6 +127,9 @@ config HAVE_KERNEL_LZO + config HAVE_KERNEL_LZ4 + bool + ++config HAVE_KERNEL_CAT ++ bool ++ + choice + prompt "Kernel compression mode" + default KERNEL_GZIP +@@ -193,9 +196,10 @@ config KERNEL_LZO + bool "LZO" + depends on HAVE_KERNEL_LZO + help +- Its compression ratio is the poorest among the choices. The kernel +- size is about 10% bigger than gzip; however its speed +- (both compression and decompression) is the fastest. ++ Its compression ratio is the poorest among the choices (apart from ++ uncompressed below). The kernel size is about 10% bigger than gzip; ++ however its speed (both compression and decompression) is the ++ fastest. + + config KERNEL_LZ4 + bool "LZ4" +@@ -209,6 +213,12 @@ config KERNEL_LZ4 + is about 8% bigger than LZO. But the decompression speed is + faster than LZO. + ++config KERNEL_CAT ++ bool "uncompressed" ++ depends on HAVE_KERNEL_CAT ++ help ++ Don't use compression at all. ++ + endchoice + + config DEFAULT_HOSTNAME +--- /dev/null ++++ b/lib/decompress_uncat.c +@@ -0,0 +1,17 @@ ++#include <linux/types.h> ++#include <linux/compiler.h> ++ ++#ifdef STATIC ++ ++STATIC int __decompress(unsigned char *buf, long in_len, ++ long (*fill)(void*, unsigned long), ++ long (*flush)(void*, unsigned long), ++ unsigned char *output, long out_len, ++ long *posp, ++ void (*error)(char *x)) ++{ ++ memmove(output, buf, in_len); ++ return 0; ++} ++ ++#endif +--- a/scripts/Makefile.lib ++++ b/scripts/Makefile.lib +@@ -357,6 +357,13 @@ cmd_lz4 = (cat $(filter-out FORCE,$^) | + lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + ++# uncompressed ++# --------------------------------------------------------------------------- ++quiet_cmd_cat = CAT $@ ++cmd_cat = (cat $(filter-out FORCE,$^) \ ++ && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ ++ (rm -f $@ ; false) ++ + # U-Boot mkimage + # --------------------------------------------------------------------------- + +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -65,6 +65,7 @@ config ARM + select HAVE_KERNEL_LZMA + select HAVE_KERNEL_LZO + select HAVE_KERNEL_XZ ++ select HAVE_KERNEL_CAT + select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M + select HAVE_KRETPROBES if (HAVE_KPROBES) + select HAVE_MEMBLOCK |