target/linux/generic/patches-2.6.31/051-lzo_compressed_kernel_for_arm.patch

   1 --- a/arch/arm/Kconfig
   2 +++ b/arch/arm/Kconfig
   3 @@ -18,6 +18,8 @@ config ARM
   4         select HAVE_KRETPROBES if (HAVE_KPROBES)
   5         select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
   6         select HAVE_GENERIC_DMA_COHERENT
   7 +       select HAVE_KERNEL_GZIP
   8 +       select HAVE_KERNEL_LZO
   9         help
  10           The ARM series is a line of low-power-consumption RISC chip designs
  11           licensed by ARM Ltd and targeted at embedded applications and
  12 --- a/arch/arm/boot/compressed/Makefile
  13 +++ b/arch/arm/boot/compressed/Makefile
  14 @@ -63,8 +63,12 @@ endif
  15
  16  SEDFLAGS       = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
  17
  18 -targets       := vmlinux vmlinux.lds piggy.gz piggy.o font.o font.c \
  19 -                head.o misc.o $(OBJS)
  20 +suffix_$(CONFIG_KERNEL_GZIP) = gzip
  21 +suffix_$(CONFIG_KERNEL_LZO)  = lzo
  22 +
  23 +targets       := vmlinux vmlinux.lds \
  24 +                piggy.$(suffix_y) piggy.$(suffix_y).o \
  25 +                font.o font.c head.o misc.o $(OBJS)
  26
  27  ifeq ($(CONFIG_FUNCTION_TRACER),y)
  28  ORIG_CFLAGS := $(KBUILD_CFLAGS)
  29 @@ -87,22 +91,31 @@ endif
  30  ifneq ($(PARAMS_PHYS),)
  31  LDFLAGS_vmlinux += --defsym params_phys=$(PARAMS_PHYS)
  32  endif
  33 -LDFLAGS_vmlinux += -p --no-undefined -X \
  34 -       $(shell $(CC) $(KBUILD_CFLAGS) --print-libgcc-file-name) -T
  35 +# ?
  36 +LDFLAGS_vmlinux += -p
  37 +# Report unresolved symbol references
  38 +LDFLAGS_vmlinux += --no-undefined
  39 +# Delete all temporary local symbols
  40 +LDFLAGS_vmlinux += -X
  41 +# Next argument is a linker script
  42 +LDFLAGS_vmlinux += -T
  43 +
  44 +# For __aeabi_uidivmod
  45 +lib1funcs = $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.o
  46
  47  # Don't allow any static data in misc.o, which
  48  # would otherwise mess up our GOT table
  49  CFLAGS_misc.o := -Dstatic=
  50
  51 -$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \
  52 -               $(addprefix $(obj)/, $(OBJS)) FORCE
  53 +$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
  54 +               $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
  55         $(call if_changed,ld)
  56         @:
  57
  58 -$(obj)/piggy.gz: $(obj)/../Image FORCE
  59 -       $(call if_changed,gzip)
  60 +$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
  61 +       $(call if_changed,$(suffix_y))
  62
  63 -$(obj)/piggy.o:  $(obj)/piggy.gz FORCE
  64 +$(obj)/piggy.$(suffix_y).o:  $(obj)/piggy.$(suffix_y) FORCE
  65
  66  CFLAGS_font.o := -Dstatic=
  67
  68 --- a/arch/arm/boot/compressed/misc.c
  69 +++ b/arch/arm/boot/compressed/misc.c
  70 @@ -18,10 +18,15 @@
  71
  72  unsigned int __machine_arch_type;
  73
  74 +#define _LINUX_STRING_H_
  75 +
  76  #include <linux/compiler.h>    /* for inline */
  77  #include <linux/types.h>       /* for size_t */
  78  #include <linux/stddef.h>      /* for NULL */
  79  #include <asm/string.h>
  80 +#include <linux/linkage.h>
  81 +
  82 +#include <asm/unaligned.h>
  83
  84  #ifdef STANDALONE_DEBUG
  85  #define putstr printf
  86 @@ -188,34 +193,8 @@ static inline __ptr_t memcpy(__ptr_t __d
  87  /*
  88   * gzip delarations
  89   */
  90 -#define OF(args)  args
  91  #define STATIC static
  92
  93 -typedef unsigned char  uch;
  94 -typedef unsigned short ush;
  95 -typedef unsigned long  ulg;
  96 -
  97 -#define WSIZE 0x8000           /* Window size must be at least 32k, */
  98 -                               /* and a power of two */
  99 -
 100 -static uch *inbuf;             /* input buffer */
 101 -static uch window[WSIZE];      /* Sliding window buffer */
 102 -
 103 -static unsigned insize;                /* valid bytes in inbuf */
 104 -static unsigned inptr;         /* index of next byte to be processed in inbuf */
 105 -static unsigned outcnt;                /* bytes in output buffer */
 106 -
 107 -/* gzip flag byte */
 108 -#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
 109 -#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
 110 -#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
 111 -#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
 112 -#define COMMENT      0x10 /* bit 4 set: file comment present */
 113 -#define ENCRYPTED    0x20 /* bit 5 set: file is encrypted */
 114 -#define RESERVED     0xC0 /* bit 6,7:   reserved */
 115 -
 116 -#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())
 117 -
 118  /* Diagnostic functions */
 119  #ifdef DEBUG
 120  #  define Assert(cond,msg) {if(!(cond)) error(msg);}
 121 @@ -233,24 +212,20 @@ static unsigned outcnt;           /* bytes in out
 122  #  define Tracecv(c,x)
 123  #endif
 124
 125 -static int  fill_inbuf(void);
 126 -static void flush_window(void);
 127  static void error(char *m);
 128
 129  extern char input_data[];
 130  extern char input_data_end[];
 131
 132 -static uch *output_data;
 133 -static ulg output_ptr;
 134 -static ulg bytes_out;
 135 +static unsigned char *output_data;
 136 +static unsigned long output_ptr;
 137
 138  static void error(char *m);
 139
 140  static void putstr(const char *);
 141
 142 -extern int end;
 143 -static ulg free_mem_ptr;
 144 -static ulg free_mem_end_ptr;
 145 +static unsigned long free_mem_ptr;
 146 +static unsigned long free_mem_end_ptr;
 147
 148  #ifdef STANDALONE_DEBUG
 149  #define NO_INFLATE_MALLOC
 150 @@ -258,46 +233,13 @@ static ulg free_mem_end_ptr;
 151
 152  #define ARCH_HAS_DECOMP_WDOG
 153
 154 -#include "../../../../lib/inflate.c"
 155 -
 156 -/* ===========================================================================
 157 - * Fill the input buffer. This is called only when the buffer is empty
 158 - * and at least one byte is really needed.
 159 - */
 160 -int fill_inbuf(void)
 161 -{
 162 -       if (insize != 0)
 163 -               error("ran out of input data");
 164 -
 165 -       inbuf = input_data;
 166 -       insize = &input_data_end[0] - &input_data[0];
 167 -
 168 -       inptr = 1;
 169 -       return inbuf[0];
 170 -}
 171 +#ifdef CONFIG_KERNEL_GZIP
 172 +#include "../../../../lib/decompress_inflate.c"
 173 +#endif
 174
 175 -/* ===========================================================================
 176 - * Write the output window window[0..outcnt-1] and update crc and bytes_out.
 177 - * (Used for the decompressed data only.)
 178 - */
 179 -void flush_window(void)
 180 -{
 181 -       ulg c = crc;
 182 -       unsigned n;
 183 -       uch *in, *out, ch;
 184 -
 185 -       in = window;
 186 -       out = &output_data[output_ptr];
 187 -       for (n = 0; n < outcnt; n++) {
 188 -               ch = *out++ = *in++;
 189 -               c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
 190 -       }
 191 -       crc = c;
 192 -       bytes_out += (ulg)outcnt;
 193 -       output_ptr += (ulg)outcnt;
 194 -       outcnt = 0;
 195 -       putstr(".");
 196 -}
 197 +#ifdef CONFIG_KERNEL_LZO
 198 +#include "../../../../lib/decompress_unlzo.c"
 199 +#endif
 200
 201  #ifndef arch_error
 202  #define arch_error(x)
 203 @@ -314,22 +256,33 @@ static void error(char *x)
 204         while(1);       /* Halt */
 205  }
 206
 207 +asmlinkage void __div0(void)
 208 +{
 209 +       error("Attempting division by 0!");
 210 +}
 211 +
 212  #ifndef STANDALONE_DEBUG
 213
 214 -ulg
 215 -decompress_kernel(ulg output_start, ulg free_mem_ptr_p, ulg free_mem_ptr_end_p,
 216 -                 int arch_id)
 217 +unsigned long
 218 +decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
 219 +               unsigned long free_mem_ptr_end_p,
 220 +               int arch_id)
 221  {
 222 -       output_data             = (uch *)output_start;  /* Points to kernel start */
 223 +       unsigned char *tmp;
 224 +
 225 +       output_data             = (unsigned char *)output_start;
 226         free_mem_ptr            = free_mem_ptr_p;
 227         free_mem_end_ptr        = free_mem_ptr_end_p;
 228         __machine_arch_type     = arch_id;
 229
 230         arch_decomp_setup();
 231
 232 -       makecrc();
 233 +       tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
 234 +       output_ptr = get_unaligned_le32(tmp);
 235 +
 236         putstr("Uncompressing Linux...");
 237 -       gunzip();
 238 +       decompress(input_data, input_data_end - input_data,
 239 +                       NULL, NULL, output_data, NULL, error);
 240         putstr(" done, booting the kernel.\n");
 241         return output_ptr;
 242  }
 243 @@ -341,11 +294,10 @@ int main()
 244  {
 245         output_data = output_buffer;
 246
 247 -       makecrc();
 248         putstr("Uncompressing Linux...");
 249 -       gunzip();
 250 +       decompress(input_data, input_data_end - input_data,
 251 +                       NULL, NULL, output_data, NULL, error);
 252         putstr("done.\n");
 253         return 0;
 254  }
 255  #endif
 256 -
 257 --- a/arch/arm/boot/compressed/piggy.S
 258 +++ /dev/null
 259 @@ -1,6 +0,0 @@
 260 -       .section .piggydata,#alloc
 261 -       .globl  input_data
 262 -input_data:
 263 -       .incbin "arch/arm/boot/compressed/piggy.gz"
 264 -       .globl  input_data_end
 265 -input_data_end:
 266 --- /dev/null
 267 +++ b/arch/arm/boot/compressed/piggy.gzip.S
 268 @@ -0,0 +1,6 @@
 269 +       .section .piggydata,#alloc
 270 +       .globl  input_data
 271 +input_data:
 272 +       .incbin "arch/arm/boot/compressed/piggy.gzip"
 273 +       .globl  input_data_end
 274 +input_data_end:
 275 --- /dev/null
 276 +++ b/arch/arm/boot/compressed/piggy.lzo.S
 277 @@ -0,0 +1,6 @@
 278 +       .section .piggydata,#alloc
 279 +       .globl  input_data
 280 +input_data:
 281 +       .incbin "arch/arm/boot/compressed/piggy.lzo"
 282 +       .globl  input_data_end
 283 +input_data_end: