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arm: add support for LZO-compressed kernels
- changes to ach/arch/boot/Makefile to make it easier to add new compression types - new piggy.lzo.S necessary for lzo compression - changes in arch/arm/boot/compressed/misc.c to allow the use of lzo or gzip, depending on the config - Kconfig support Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Tested-by: Wu Zhangjin <wuzhangjin@gmail.com> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: Russell King <rmk@arm.linux.org.uk> Acked-by: Russell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Albin Tonnerre
Linus Torvalds
parent
7dd65feb6c
commit
e7db7b4270
@ -18,6 +18,8 @@ config ARM
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select HAVE_KRETPROBES if (HAVE_KPROBES)
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select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
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select HAVE_GENERIC_DMA_COHERENT
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_LZO
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help
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The ARM series is a line of low-power-consumption RISC chip designs
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licensed by ARM Ltd and targeted at embedded applications and
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@ -63,8 +63,12 @@ endif
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SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
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targets := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
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head.o misc.o $(OBJS)
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suffix_$(CONFIG_KERNEL_GZIP) = gzip
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suffix_$(CONFIG_KERNEL_LZO) = lzo
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targets := vmlinux vmlinux.lds \
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piggy.$(suffix_y) piggy.$(suffix_y).o \
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font.o font.c head.o misc.o $(OBJS)
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ifeq ($(CONFIG_FUNCTION_TRACER),y)
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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@ -87,22 +91,34 @@ endif
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ifneq ($(PARAMS_PHYS),)
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LDFLAGS_vmlinux += --defsym params_phys=$(PARAMS_PHYS)
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endif
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LDFLAGS_vmlinux += -p --no-undefined -X \
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$(shell $(CC) $(KBUILD_CFLAGS) --print-libgcc-file-name) -T
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# ?
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LDFLAGS_vmlinux += -p
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# Report unresolved symbol references
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LDFLAGS_vmlinux += --no-undefined
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# Delete all temporary local symbols
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LDFLAGS_vmlinux += -X
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# Next argument is a linker script
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LDFLAGS_vmlinux += -T
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# For __aeabi_uidivmod
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lib1funcs = $(obj)/lib1funcs.o
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$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
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$(call cmd,shipped)
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# Don't allow any static data in misc.o, which
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# would otherwise mess up our GOT table
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CFLAGS_misc.o := -Dstatic=
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
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$(addprefix $(obj)/, $(OBJS)) FORCE
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
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$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
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$(call if_changed,ld)
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@:
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$(obj)/piggy.gz: $(obj)/../Image FORCE
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$(call if_changed,gzip)
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$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
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$(call if_changed,$(suffix_y))
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$(obj)/piggy.o: $(obj)/piggy.gz FORCE
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$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE
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CFLAGS_font.o := -Dstatic=
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@ -18,10 +18,15 @@
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unsigned int __machine_arch_type;
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#define _LINUX_STRING_H_
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#include <linux/compiler.h> /* for inline */
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#include <linux/types.h> /* for size_t */
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#include <linux/stddef.h> /* for NULL */
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#include <asm/string.h>
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#include <linux/linkage.h>
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#include <asm/unaligned.h>
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#ifdef STANDALONE_DEBUG
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#define putstr printf
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@ -188,34 +193,8 @@ static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
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/*
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* gzip delarations
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*/
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#define OF(args) args
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#define STATIC static
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typedef unsigned char uch;
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typedef unsigned short ush;
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typedef unsigned long ulg;
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#define WSIZE 0x8000 /* Window size must be at least 32k, */
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/* and a power of two */
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static uch *inbuf; /* input buffer */
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static uch window[WSIZE]; /* Sliding window buffer */
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static unsigned insize; /* valid bytes in inbuf */
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static unsigned inptr; /* index of next byte to be processed in inbuf */
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static unsigned outcnt; /* bytes in output buffer */
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/* gzip flag byte */
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#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
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#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
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#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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#define COMMENT 0x10 /* bit 4 set: file comment present */
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#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
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#define RESERVED 0xC0 /* bit 6,7: reserved */
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#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
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/* Diagnostic functions */
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#ifdef DEBUG
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# define Assert(cond,msg) {if(!(cond)) error(msg);}
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@ -233,24 +212,20 @@ static unsigned outcnt; /* bytes in output buffer */
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# define Tracecv(c,x)
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#endif
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static int fill_inbuf(void);
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static void flush_window(void);
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static void error(char *m);
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extern char input_data[];
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extern char input_data_end[];
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static uch *output_data;
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static ulg output_ptr;
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static ulg bytes_out;
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static unsigned char *output_data;
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static unsigned long output_ptr;
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static void error(char *m);
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static void putstr(const char *);
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extern int end;
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static ulg free_mem_ptr;
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static ulg free_mem_end_ptr;
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static unsigned long free_mem_ptr;
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static unsigned long free_mem_end_ptr;
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#ifdef STANDALONE_DEBUG
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#define NO_INFLATE_MALLOC
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@ -258,46 +233,13 @@ static ulg free_mem_end_ptr;
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#define ARCH_HAS_DECOMP_WDOG
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#include "../../../../lib/inflate.c"
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#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/decompress_inflate.c"
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#endif
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/* ===========================================================================
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* Fill the input buffer. This is called only when the buffer is empty
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* and at least one byte is really needed.
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*/
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int fill_inbuf(void)
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{
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if (insize != 0)
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error("ran out of input data");
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inbuf = input_data;
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insize = &input_data_end[0] - &input_data[0];
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inptr = 1;
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return inbuf[0];
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}
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/* ===========================================================================
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* Write the output window window[0..outcnt-1] and update crc and bytes_out.
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* (Used for the decompressed data only.)
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*/
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void flush_window(void)
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{
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ulg c = crc;
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unsigned n;
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uch *in, *out, ch;
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in = window;
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out = &output_data[output_ptr];
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for (n = 0; n < outcnt; n++) {
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ch = *out++ = *in++;
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c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
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}
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crc = c;
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bytes_out += (ulg)outcnt;
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output_ptr += (ulg)outcnt;
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outcnt = 0;
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putstr(".");
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}
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#ifdef CONFIG_KERNEL_LZO
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#include "../../../../lib/decompress_unlzo.c"
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#endif
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#ifndef arch_error
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#define arch_error(x)
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@ -314,22 +256,33 @@ static void error(char *x)
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while(1); /* Halt */
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}
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asmlinkage void __div0(void)
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{
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error("Attempting division by 0!");
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}
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#ifndef STANDALONE_DEBUG
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ulg
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decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
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int arch_id)
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unsigned long
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decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
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unsigned long free_mem_ptr_end_p,
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int arch_id)
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{
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output_data = (uch *)output_start; /* Points to kernel start */
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unsigned char *tmp;
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output_data = (unsigned char *)output_start;
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free_mem_ptr = free_mem_ptr_p;
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free_mem_end_ptr = free_mem_ptr_end_p;
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__machine_arch_type = arch_id;
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arch_decomp_setup();
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makecrc();
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tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
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output_ptr = get_unaligned_le32(tmp);
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putstr("Uncompressing Linux...");
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gunzip();
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decompress(input_data, input_data_end - input_data,
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NULL, NULL, output_data, NULL, error);
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putstr(" done, booting the kernel.\n");
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return output_ptr;
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}
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@ -341,11 +294,10 @@ int main()
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{
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output_data = output_buffer;
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makecrc();
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putstr("Uncompressing Linux...");
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gunzip();
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decompress(input_data, input_data_end - input_data,
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NULL, NULL, output_data, NULL, error);
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putstr("done.\n");
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return 0;
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}
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#endif
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6
arch/arm/boot/compressed/piggy.gzip.S
Normal file
6
arch/arm/boot/compressed/piggy.gzip.S
Normal file
@ -0,0 +1,6 @@
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.section .piggydata,#alloc
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.globl input_data
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input_data:
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.incbin "arch/arm/boot/compressed/piggy.gzip"
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.globl input_data_end
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input_data_end:
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@ -1,6 +1,6 @@
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.section .piggydata,#alloc
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.globl input_data
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input_data:
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.incbin "arch/arm/boot/compressed/piggy.gz"
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.incbin "arch/arm/boot/compressed/piggy.lzo"
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.globl input_data_end
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input_data_end:
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