From e7db7b4270ed2a606b8c0b5f944a5f92ade0e84c Mon Sep 17 00:00:00 2001 From: Albin Tonnerre Date: Fri, 8 Jan 2010 14:42:43 -0800 Subject: 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 Tested-by: Wu Zhangjin Acked-by: "H. Peter Anvin" Cc: Ingo Molnar Cc: Thomas Gleixner Tested-by: Russell King Acked-by: Russell King Cc: Ralf Baechle Cc: Martin Michlmayr Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/arm/boot/compressed/Makefile | 34 +++++++--- arch/arm/boot/compressed/misc.c | 116 ++++++++++------------------------ arch/arm/boot/compressed/piggy.S | 6 -- arch/arm/boot/compressed/piggy.gzip.S | 6 ++ arch/arm/boot/compressed/piggy.lzo.S | 6 ++ 5 files changed, 71 insertions(+), 97 deletions(-) delete mode 100644 arch/arm/boot/compressed/piggy.S create mode 100644 arch/arm/boot/compressed/piggy.gzip.S create mode 100644 arch/arm/boot/compressed/piggy.lzo.S (limited to 'arch/arm/boot/compressed') diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index ce39dc5..2d4d88b 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -63,8 +63,12 @@ endif SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/ -targets := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \ - head.o misc.o $(OBJS) +suffix_$(CONFIG_KERNEL_GZIP) = gzip +suffix_$(CONFIG_KERNEL_LZO) = lzo + +targets := vmlinux vmlinux.lds \ + piggy.$(suffix_y) piggy.$(suffix_y).o \ + font.o font.c head.o misc.o $(OBJS) ifeq ($(CONFIG_FUNCTION_TRACER),y) ORIG_CFLAGS := $(KBUILD_CFLAGS) @@ -87,22 +91,34 @@ endif ifneq ($(PARAMS_PHYS),) LDFLAGS_vmlinux += --defsym params_phys=$(PARAMS_PHYS) endif -LDFLAGS_vmlinux += -p --no-undefined -X \ - $(shell $(CC) $(KBUILD_CFLAGS) --print-libgcc-file-name) -T +# ? +LDFLAGS_vmlinux += -p +# Report unresolved symbol references +LDFLAGS_vmlinux += --no-undefined +# Delete all temporary local symbols +LDFLAGS_vmlinux += -X +# Next argument is a linker script +LDFLAGS_vmlinux += -T + +# For __aeabi_uidivmod +lib1funcs = $(obj)/lib1funcs.o + +$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE + $(call cmd,shipped) # Don't allow any static data in misc.o, which # would otherwise mess up our GOT table CFLAGS_misc.o := -Dstatic= -$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ - $(addprefix $(obj)/, $(OBJS)) FORCE +$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \ + $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE $(call if_changed,ld) @: -$(obj)/piggy.gz: $(obj)/../Image FORCE - $(call if_changed,gzip) +$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE + $(call if_changed,$(suffix_y)) -$(obj)/piggy.o: $(obj)/piggy.gz FORCE +$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE CFLAGS_font.o := -Dstatic= diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 17153b5..7e0fe4d 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -18,10 +18,15 @@ unsigned int __machine_arch_type; +#define _LINUX_STRING_H_ + #include /* for inline */ #include /* for size_t */ #include /* for NULL */ #include +#include + +#include #ifdef STANDALONE_DEBUG #define putstr printf @@ -188,34 +193,8 @@ static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src, /* * gzip delarations */ -#define OF(args) args #define STATIC static -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -#define WSIZE 0x8000 /* Window size must be at least 32k, */ - /* and a power of two */ - -static uch *inbuf; /* input buffer */ -static uch window[WSIZE]; /* Sliding window buffer */ - -static unsigned insize; /* valid bytes in inbuf */ -static unsigned inptr; /* index of next byte to be processed in inbuf */ -static unsigned outcnt; /* bytes in output buffer */ - -/* gzip flag byte */ -#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ -#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */ -#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ -#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ -#define COMMENT 0x10 /* bit 4 set: file comment present */ -#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */ -#define RESERVED 0xC0 /* bit 6,7: reserved */ - -#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf()) - /* Diagnostic functions */ #ifdef DEBUG # define Assert(cond,msg) {if(!(cond)) error(msg);} @@ -233,24 +212,20 @@ static unsigned outcnt; /* bytes in output buffer */ # define Tracecv(c,x) #endif -static int fill_inbuf(void); -static void flush_window(void); static void error(char *m); extern char input_data[]; extern char input_data_end[]; -static uch *output_data; -static ulg output_ptr; -static ulg bytes_out; +static unsigned char *output_data; +static unsigned long output_ptr; static void error(char *m); static void putstr(const char *); -extern int end; -static ulg free_mem_ptr; -static ulg free_mem_end_ptr; +static unsigned long free_mem_ptr; +static unsigned long free_mem_end_ptr; #ifdef STANDALONE_DEBUG #define NO_INFLATE_MALLOC @@ -258,46 +233,13 @@ static ulg free_mem_end_ptr; #define ARCH_HAS_DECOMP_WDOG -#include "../../../../lib/inflate.c" - -/* =========================================================================== - * Fill the input buffer. This is called only when the buffer is empty - * and at least one byte is really needed. - */ -int fill_inbuf(void) -{ - if (insize != 0) - error("ran out of input data"); - - inbuf = input_data; - insize = &input_data_end[0] - &input_data[0]; - - inptr = 1; - return inbuf[0]; -} +#ifdef CONFIG_KERNEL_GZIP +#include "../../../../lib/decompress_inflate.c" +#endif -/* =========================================================================== - * Write the output window window[0..outcnt-1] and update crc and bytes_out. - * (Used for the decompressed data only.) - */ -void flush_window(void) -{ - ulg c = crc; - unsigned n; - uch *in, *out, ch; - - in = window; - out = &output_data[output_ptr]; - for (n = 0; n < outcnt; n++) { - ch = *out++ = *in++; - c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); - } - crc = c; - bytes_out += (ulg)outcnt; - output_ptr += (ulg)outcnt; - outcnt = 0; - putstr("."); -} +#ifdef CONFIG_KERNEL_LZO +#include "../../../../lib/decompress_unlzo.c" +#endif #ifndef arch_error #define arch_error(x) @@ -314,22 +256,33 @@ static void error(char *x) while(1); /* Halt */ } +asmlinkage void __div0(void) +{ + error("Attempting division by 0!"); +} + #ifndef STANDALONE_DEBUG -ulg -decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p, - int arch_id) +unsigned long +decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p, + unsigned long free_mem_ptr_end_p, + int arch_id) { - output_data = (uch *)output_start; /* Points to kernel start */ + unsigned char *tmp; + + output_data = (unsigned char *)output_start; free_mem_ptr = free_mem_ptr_p; free_mem_end_ptr = free_mem_ptr_end_p; __machine_arch_type = arch_id; arch_decomp_setup(); - makecrc(); + tmp = (unsigned char *) (((unsigned long)input_data_end) - 4); + output_ptr = get_unaligned_le32(tmp); + putstr("Uncompressing Linux..."); - gunzip(); + decompress(input_data, input_data_end - input_data, + NULL, NULL, output_data, NULL, error); putstr(" done, booting the kernel.\n"); return output_ptr; } @@ -341,11 +294,10 @@ int main() { output_data = output_buffer; - makecrc(); putstr("Uncompressing Linux..."); - gunzip(); + decompress(input_data, input_data_end - input_data, + NULL, NULL, output_data, NULL, error); putstr("done.\n"); return 0; } #endif - diff --git a/arch/arm/boot/compressed/piggy.S b/arch/arm/boot/compressed/piggy.S deleted file mode 100644 index 54c9518..0000000 --- a/arch/arm/boot/compressed/piggy.S +++ /dev/null @@ -1,6 +0,0 @@ - .section .piggydata,#alloc - .globl input_data -input_data: - .incbin "arch/arm/boot/compressed/piggy.gz" - .globl input_data_end -input_data_end: diff --git a/arch/arm/boot/compressed/piggy.gzip.S b/arch/arm/boot/compressed/piggy.gzip.S new file mode 100644 index 0000000..a68adf9 --- /dev/null +++ b/arch/arm/boot/compressed/piggy.gzip.S @@ -0,0 +1,6 @@ + .section .piggydata,#alloc + .globl input_data +input_data: + .incbin "arch/arm/boot/compressed/piggy.gzip" + .globl input_data_end +input_data_end: diff --git a/arch/arm/boot/compressed/piggy.lzo.S b/arch/arm/boot/compressed/piggy.lzo.S new file mode 100644 index 0000000..a425ad9 --- /dev/null +++ b/arch/arm/boot/compressed/piggy.lzo.S @@ -0,0 +1,6 @@ + .section .piggydata,#alloc + .globl input_data +input_data: + .incbin "arch/arm/boot/compressed/piggy.lzo" + .globl input_data_end +input_data_end: -- cgit v1.1 From b53e9b5ebd5c6e718f54bcacd4e97b71533ca681 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 14 Jan 2010 20:36:55 +0100 Subject: ARM: 5882/1: ARM: Fix uncompress code compile for different defines of flush(void) Because of the include of the decompress_inflate.c file from boot/compress/misc.c, there are different flush() defines: In file included from arch/arm/boot/compressed/misc.c:249: arch/arm/boot/compressed/../../../../lib/decompress_inflate.c:138:29: error: macro "flush" passed 2 arguments, but takes just 0 Fix this by removing the define of flush() in misc.c for CONFIG_DEBUG_ICEDCC as it's already defined in mach/uncompress.h, and that is being included unconditionally. Also use a static inline function instead of define for mach-mxc and mach-gemini to avoid similar bug for those platforms. Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/boot/compressed/misc.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/arm/boot/compressed') diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index 7e0fe4d..af6479f 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -88,7 +88,6 @@ static void icedcc_putc(int ch) #endif #define putc(ch) icedcc_putc(ch) -#define flush() do { } while (0) #endif static void putstr(const char *ptr) -- cgit v1.1 From 200b7a8dc09504bc0aedac567a307a6e533f39e5 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Tue, 19 Jan 2010 16:40:07 +0100 Subject: ARM: 5884/1: arm: Fix DCC console for v7 Without this patch arch/arm/compressed/head.S defaults to generic DCC code that does not work for v7. For more information on the v7 DCC, see Cortex-A8 TRM "12.11.1 Debug communications channel". To use it with post 2.6.33-rc1 or later, you need to have: CONFIG_DEBUG_LL=y ONFIG_DEBUG_ICEDCC=y CONFIG_EARLY_PRINTK=y Earlier kernels need commit 93fd03a8c6728b58879f8af20ffd55d9c32a778b backported. Tested on omap3430. Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/boot/compressed/head.S | 8 ++++++++ arch/arm/boot/compressed/misc.c | 12 ++++++++++++ 2 files changed, 20 insertions(+) (limited to 'arch/arm/boot/compressed') diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index d356af7..4fddc50 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -27,6 +27,14 @@ .macro writeb, ch, rb mcr p14, 0, \ch, c0, c5, 0 .endm +#elif defined(CONFIG_CPU_V7) + .macro loadsp, rb + .endm + .macro writeb, ch, rb +wait: mrc p14, 0, pc, c0, c1, 0 + bcs wait + mcr p14, 0, \ch, c0, c5, 0 + .endm #elif defined(CONFIG_CPU_XSCALE) .macro loadsp, rb .endm diff --git a/arch/arm/boot/compressed/misc.c b/arch/arm/boot/compressed/misc.c index af6479f..56a0d11 100644 --- a/arch/arm/boot/compressed/misc.c +++ b/arch/arm/boot/compressed/misc.c @@ -53,6 +53,18 @@ static void icedcc_putc(int ch) asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch)); } + +#elif defined(CONFIG_CPU_V7) + +static void icedcc_putc(int ch) +{ + asm( + "wait: mrc p14, 0, pc, c0, c1, 0 \n\ + bcs wait \n\ + mcr p14, 0, %0, c0, c5, 0 " + : : "r" (ch)); +} + #elif defined(CONFIG_CPU_XSCALE) static void icedcc_putc(int ch) -- cgit v1.1