[deliverable/linux.git] / arch / x86 / boot / compressed / misc.c

/*
 * misc.c
 *
 * This is a collection of several routines from gzip-1.0.3
 * adapted for Linux.
 *
 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
 * puts by Nick Holloway 1993, better puts by Martin Mares 1995
 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
 */

#include "misc.h"

/* WARNING!!
 * This code is compiled with -fPIC and it is relocated dynamically
 * at run time, but no relocation processing is performed.
 * This means that it is not safe to place pointers in static structures.
 */

/*
 * Getting to provable safe in place decompression is hard.
 * Worst case behaviours need to be analyzed.
 * Background information:
 *
 * The file layout is:
 *    magic[2]
 *    method[1]
 *    flags[1]
 *    timestamp[4]
 *    extraflags[1]
 *    os[1]
 *    compressed data blocks[N]
 *    crc[4] orig_len[4]
 *
 * resulting in 18 bytes of non compressed data overhead.
 *
 * Files divided into blocks
 * 1 bit (last block flag)
 * 2 bits (block type)
 *
 * 1 block occurs every 32K -1 bytes or when there 50% compression
 * has been achieved. The smallest block type encoding is always used.
 *
 * stored:
 *    32 bits length in bytes.
 *
 * fixed:
 *    magic fixed tree.
 *    symbols.
 *
 * dynamic:
 *    dynamic tree encoding.
 *    symbols.
 *
 *
 * The buffer for decompression in place is the length of the
 * uncompressed data, plus a small amount extra to keep the algorithm safe.
 * The compressed data is placed at the end of the buffer.  The output
 * pointer is placed at the start of the buffer and the input pointer
 * is placed where the compressed data starts.  Problems will occur
 * when the output pointer overruns the input pointer.
 *
 * The output pointer can only overrun the input pointer if the input
 * pointer is moving faster than the output pointer.  A condition only
 * triggered by data whose compressed form is larger than the uncompressed
 * form.
 *
 * The worst case at the block level is a growth of the compressed data
 * of 5 bytes per 32767 bytes.
 *
 * The worst case internal to a compressed block is very hard to figure.
 * The worst case can at least be boundined by having one bit that represents
 * 32764 bytes and then all of the rest of the bytes representing the very
 * very last byte.
 *
 * All of which is enough to compute an amount of extra data that is required
 * to be safe.  To avoid problems at the block level allocating 5 extra bytes
 * per 32767 bytes of data is sufficient.  To avoind problems internal to a
 * block adding an extra 32767 bytes (the worst case uncompressed block size)
 * is sufficient, to ensure that in the worst case the decompressed data for
 * block will stop the byte before the compressed data for a block begins.
 * To avoid problems with the compressed data's meta information an extra 18
 * bytes are needed.  Leading to the formula:
 *
 * extra_bytes = (uncompressed_size >> 12) + 32768 + 18 + decompressor_size.
 *
 * Adding 8 bytes per 32K is a bit excessive but much easier to calculate.
 * Adding 32768 instead of 32767 just makes for round numbers.
 * Adding the decompressor_size is necessary as it musht live after all
 * of the data as well.  Last I measured the decompressor is about 14K.
 * 10K of actual data and 4K of bss.
 *
 */

/*
 * gzip declarations
 */
#define STATIC		static

#undef memset
#undef memcpy
#define memzero(s, n)	memset((s), 0, (n))


static void error(char *m);

/*
 * This is set up by the setup-routine at boot-time
 */
struct boot_params *real_mode;		/* Pointer to real-mode data */
static int debug;

void *memset(void *s, int c, size_t n);
void *memcpy(void *dest, const void *src, size_t n);

#ifdef CONFIG_X86_64
#define memptr long
#else
#define memptr unsigned
#endif

static memptr free_mem_ptr;
static memptr free_mem_end_ptr;

static char *vidmem;
static int vidport;
static int lines, cols;

#ifdef CONFIG_KERNEL_GZIP
#include "../../../../lib/decompress_inflate.c"
#endif

#ifdef CONFIG_KERNEL_BZIP2
#include "../../../../lib/decompress_bunzip2.c"
#endif

#ifdef CONFIG_KERNEL_LZMA
#include "../../../../lib/decompress_unlzma.c"
#endif

#ifdef CONFIG_KERNEL_XZ
#include "../../../../lib/decompress_unxz.c"
#endif

#ifdef CONFIG_KERNEL_LZO
#include "../../../../lib/decompress_unlzo.c"
#endif

static void scroll(void)
{
	int i;

	memcpy(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2);
	for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2)
		vidmem[i] = ' ';
}

#define XMTRDY          0x20

#define TXR             0       /*  Transmit register (WRITE) */
#define LSR             5       /*  Line Status               */
static void serial_putchar(int ch)
{
	unsigned timeout = 0xffff;

	while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
		cpu_relax();

	outb(ch, early_serial_base + TXR);
}

void __putstr(int error, const char *s)
{
	int x, y, pos;
	char c;

#ifndef CONFIG_X86_VERBOSE_BOOTUP
	if (!error)
		return;
#endif
	if (early_serial_base) {
		const char *str = s;
		while (*str) {
			if (*str == '\n')
				serial_putchar('\r');
			serial_putchar(*str++);
		}
	}

	if (real_mode->screen_info.orig_video_mode == 0 &&
	    lines == 0 && cols == 0)
		return;

	x = real_mode->screen_info.orig_x;
	y = real_mode->screen_info.orig_y;

	while ((c = *s++) != '\0') {
		if (c == '\n') {
			x = 0;
			if (++y >= lines) {
				scroll();
				y--;
			}
		} else {
			vidmem[(x + cols * y) * 2] = c;
			if (++x >= cols) {
				x = 0;
				if (++y >= lines) {
					scroll();
					y--;
				}
			}
		}
	}

	real_mode->screen_info.orig_x = x;
	real_mode->screen_info.orig_y = y;

	pos = (x + cols * y) * 2;	/* Update cursor position */
	outb(14, vidport);
	outb(0xff & (pos >> 9), vidport+1);
	outb(15, vidport);
	outb(0xff & (pos >> 1), vidport+1);
}

static void debug_putstr(const char *s)
{
	if (debug)
		putstr(s);
}

void *memset(void *s, int c, size_t n)
{
	int i;
	char *ss = s;

	for (i = 0; i < n; i++)
		ss[i] = c;
	return s;
}
#ifdef CONFIG_X86_32
void *memcpy(void *dest, const void *src, size_t n)
{
	int d0, d1, d2;
	asm volatile(
		"rep ; movsl\n\t"
		"movl %4,%%ecx\n\t"
		"rep ; movsb\n\t"
		: "=&c" (d0), "=&D" (d1), "=&S" (d2)
		: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
		: "memory");

	return dest;
}
#else
void *memcpy(void *dest, const void *src, size_t n)
{
	long d0, d1, d2;
	asm volatile(
		"rep ; movsq\n\t"
		"movq %4,%%rcx\n\t"
		"rep ; movsb\n\t"
		: "=&c" (d0), "=&D" (d1), "=&S" (d2)
		: "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
		: "memory");

	return dest;
}
#endif

static void error(char *x)
{
	__putstr(1, "\n\n");
	__putstr(1, x);
	__putstr(1, "\n\n -- System halted");

	while (1)
		asm("hlt");
}

static void parse_elf(void *output)
{
#ifdef CONFIG_X86_64
	Elf64_Ehdr ehdr;
	Elf64_Phdr *phdrs, *phdr;
#else
	Elf32_Ehdr ehdr;
	Elf32_Phdr *phdrs, *phdr;
#endif
	void *dest;
	int i;

	memcpy(&ehdr, output, sizeof(ehdr));
	if (ehdr.e_ident[EI_MAG0] != ELFMAG0 ||
	   ehdr.e_ident[EI_MAG1] != ELFMAG1 ||
	   ehdr.e_ident[EI_MAG2] != ELFMAG2 ||
	   ehdr.e_ident[EI_MAG3] != ELFMAG3) {
		error("Kernel is not a valid ELF file");
		return;
	}

	debug_putstr("Parsing ELF... ");

	phdrs = malloc(sizeof(*phdrs) * ehdr.e_phnum);
	if (!phdrs)
		error("Failed to allocate space for phdrs");

	memcpy(phdrs, output + ehdr.e_phoff, sizeof(*phdrs) * ehdr.e_phnum);

	for (i = 0; i < ehdr.e_phnum; i++) {
		phdr = &phdrs[i];

		switch (phdr->p_type) {
		case PT_LOAD:
#ifdef CONFIG_RELOCATABLE
			dest = output;
			dest += (phdr->p_paddr - LOAD_PHYSICAL_ADDR);
#else
			dest = (void *)(phdr->p_paddr);
#endif
			memcpy(dest,
			       output + phdr->p_offset,
			       phdr->p_filesz);
			break;
		default: /* Ignore other PT_* */ break;
		}
	}

	free(phdrs);
}

asmlinkage void decompress_kernel(void *rmode, memptr heap,
				  unsigned char *input_data,
				  unsigned long input_len,
				  unsigned char *output)
{
	real_mode = rmode;

	if (cmdline_find_option_bool("debug"))
		debug = 1;

	if (real_mode->screen_info.orig_video_mode == 7) {
		vidmem = (char *) 0xb0000;
		vidport = 0x3b4;
	} else {
		vidmem = (char *) 0xb8000;
		vidport = 0x3d4;
	}

	lines = real_mode->screen_info.orig_video_lines;
	cols = real_mode->screen_info.orig_video_cols;

	console_init();
	debug_putstr("early console in decompress_kernel\n");

	free_mem_ptr     = heap;	/* Heap */
	free_mem_end_ptr = heap + BOOT_HEAP_SIZE;

	if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
		error("Destination address inappropriately aligned");
#ifdef CONFIG_X86_64
	if (heap > 0x3fffffffffffUL)
		error("Destination address too large");
#else
	if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff))
		error("Destination address too large");
#endif
#ifndef CONFIG_RELOCATABLE
	if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
		error("Wrong destination address");
#endif

	debug_putstr("\nDecompressing Linux... ");
	decompress(input_data, input_len, NULL, NULL, output, NULL, error);
	parse_elf(output);
	debug_putstr("done.\nBooting the kernel.\n");
	return;
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* misc.c
818a08f8 IC	3	*
818a08f8 IC	4	* This is a collection of several routines from gzip-1.0.3
1da177e4 LT	5	* adapted for Linux.
	6	*
	7	* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
	8	* puts by Nick Holloway 1993, better puts by Martin Mares 1995
	9	* High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
	10	*/
	11
8fee13a4	12	#include "misc.h"
968de4f0 EB	13
	14	/* WARNING!!
	15	* This code is compiled with -fPIC and it is relocated dynamically
	16	* at run time, but no relocation processing is performed.
	17	* This means that it is not safe to place pointers in static structures.
	18	*/
	19
	20	/*
	21	* Getting to provable safe in place decompression is hard.
27b46d76	22	* Worst case behaviours need to be analyzed.
968de4f0 EB	23	* Background information:
	24	*
	25	* The file layout is:
	26	* magic[2]
	27	* method[1]
	28	* flags[1]
	29	* timestamp[4]
	30	* extraflags[1]
	31	* os[1]
	32	* compressed data blocks[N]
	33	* crc[4] orig_len[4]
	34	*
	35	* resulting in 18 bytes of non compressed data overhead.
	36	*
	37	* Files divided into blocks
	38	* 1 bit (last block flag)
	39	* 2 bits (block type)
	40	*
1180e01d IM	41	* 1 block occurs every 32K -1 bytes or when there 50% compression
1180e01d IM	42	* has been achieved. The smallest block type encoding is always used.
968de4f0 EB	43	*
	44	* stored:
	45	* 32 bits length in bytes.
	46	*
	47	* fixed:
	48	* magic fixed tree.
	49	* symbols.
	50	*
	51	* dynamic:
	52	* dynamic tree encoding.
	53	* symbols.
	54	*
	55	*
	56	* The buffer for decompression in place is the length of the
	57	* uncompressed data, plus a small amount extra to keep the algorithm safe.
	58	* The compressed data is placed at the end of the buffer. The output
	59	* pointer is placed at the start of the buffer and the input pointer
	60	* is placed where the compressed data starts. Problems will occur
	61	* when the output pointer overruns the input pointer.
	62	*
	63	* The output pointer can only overrun the input pointer if the input
	64	* pointer is moving faster than the output pointer. A condition only
	65	* triggered by data whose compressed form is larger than the uncompressed
	66	* form.
	67	*
	68	* The worst case at the block level is a growth of the compressed data
	69	* of 5 bytes per 32767 bytes.
	70	*
	71	* The worst case internal to a compressed block is very hard to figure.
	72	* The worst case can at least be boundined by having one bit that represents
	73	* 32764 bytes and then all of the rest of the bytes representing the very
	74	* very last byte.
	75	*
	76	* All of which is enough to compute an amount of extra data that is required
	77	* to be safe. To avoid problems at the block level allocating 5 extra bytes
1180e01d IM	78	* per 32767 bytes of data is sufficient. To avoind problems internal to a
	79	* block adding an extra 32767 bytes (the worst case uncompressed block size)
	80	* is sufficient, to ensure that in the worst case the decompressed data for
968de4f0 EB	81	* block will stop the byte before the compressed data for a block begins.
	82	* To avoid problems with the compressed data's meta information an extra 18
	83	* bytes are needed. Leading to the formula:
	84	*
	85	* extra_bytes = (uncompressed_size >> 12) + 32768 + 18 + decompressor_size.
	86	*
	87	* Adding 8 bytes per 32K is a bit excessive but much easier to calculate.
	88	* Adding 32768 instead of 32767 just makes for round numbers.
	89	* Adding the decompressor_size is necessary as it musht live after all
	90	* of the data as well. Last I measured the decompressor is about 14K.
27b46d76	91	* 10K of actual data and 4K of bss.
968de4f0 EB	92	*
968de4f0 EB	93	*/
1da177e4 LT	94
	95	/*
	96	* gzip declarations
	97	*/
1180e01d	98	#define STATIC static
1da177e4 LT	99
	100	#undef memset
	101	#undef memcpy
1180e01d	102	#define memzero(s, n) memset((s), 0, (n))
1da177e4	103
1da177e4	104
1da177e4	105	static void error(char *m);
fd77c7ca	106
1da177e4 LT	107	/*
	108	* This is set up by the setup-routine at boot-time
	109	*/
8fee13a4	110	struct boot_params real_mode; / Pointer to real-mode data */
8fee13a4	111	static int debug;
1da177e4	112
6175ddf0 BG	113	void memset(void s, int c, size_t n);
6175ddf0 BG	114	void memcpy(void dest, const void *src, size_t n);
b79c4df7	115
778cb929 IC	116	#ifdef CONFIG_X86_64
	117	#define memptr long
	118	#else
	119	#define memptr unsigned
	120	#endif
	121
	122	static memptr free_mem_ptr;
	123	static memptr free_mem_end_ptr;
1da177e4	124
03056c88	125	static char *vidmem;
1da177e4 LT	126	static int vidport;
	127	static int lines, cols;
	128
ae03c499 AK	129	#ifdef CONFIG_KERNEL_GZIP
	130	#include "../../../../lib/decompress_inflate.c"
	131	#endif
	132
	133	#ifdef CONFIG_KERNEL_BZIP2
	134	#include "../../../../lib/decompress_bunzip2.c"
	135	#endif
	136
	137	#ifdef CONFIG_KERNEL_LZMA
	138	#include "../../../../lib/decompress_unlzma.c"
	139	#endif
1da177e4	140
30314804 LC	141	#ifdef CONFIG_KERNEL_XZ
	142	#include "../../../../lib/decompress_unxz.c"
	143	#endif
	144
13510997 AT	145	#ifdef CONFIG_KERNEL_LZO
	146	#include "../../../../lib/decompress_unlzo.c"
	147	#endif
	148
1da177e4 LT	149	static void scroll(void)
	150	{
	151	int i;
	152
fd77c7ca PC	153	memcpy(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2);
fd77c7ca PC	154	for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2)
1da177e4 LT	155	vidmem[i] = ' ';
	156	}
	157
8fee13a4 YL	158	#define XMTRDY 0x20
	159
	160	#define TXR 0 /* Transmit register (WRITE) */
	161	#define LSR 5 /* Line Status */
	162	static void serial_putchar(int ch)
	163	{
	164	unsigned timeout = 0xffff;
	165
	166	while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
	167	cpu_relax();
	168
	169	outb(ch, early_serial_base + TXR);
	170	}
	171
	172	void __putstr(int error, const char *s)
1da177e4	173	{
fd77c7ca	174	int x, y, pos;
1da177e4 LT	175	char c;
1da177e4 LT	176
6bcb13b3 BC	177	#ifndef CONFIG_X86_VERBOSE_BOOTUP
	178	if (!error)
	179	return;
	180	#endif
8fee13a4 YL	181	if (early_serial_base) {
	182	const char *str = s;
	183	while (*str) {
	184	if (*str == '\n')
	185	serial_putchar('\r');
	186	serial_putchar(*str++);
	187	}
	188	}
6bcb13b3	189
23968f71 KH	190	if (real_mode->screen_info.orig_video_mode == 0 &&
23968f71 KH	191	lines == 0 && cols == 0)
a24e7851 RR	192	return;
a24e7851 RR	193
23968f71 KH	194	x = real_mode->screen_info.orig_x;
23968f71 KH	195	y = real_mode->screen_info.orig_y;
1da177e4	196
fd77c7ca PC	197	while ((c = *s++) != '\0') {
fd77c7ca PC	198	if (c == '\n') {
1da177e4	199	x = 0;
fd77c7ca	200	if (++y >= lines) {
1da177e4 LT	201	scroll();
	202	y--;
	203	}
	204	} else {
020878ac	205	vidmem[(x + cols * y) * 2] = c;
fd77c7ca	206	if (++x >= cols) {
1da177e4	207	x = 0;
fd77c7ca	208	if (++y >= lines) {
1da177e4 LT	209	scroll();
	210	y--;
	211	}
	212	}
	213	}
	214	}
	215
23968f71 KH	216	real_mode->screen_info.orig_x = x;
23968f71 KH	217	real_mode->screen_info.orig_y = y;
1da177e4 LT	218
1da177e4 LT	219	pos = (x + cols * y) * 2; /* Update cursor position */
b02aae9c RH	220	outb(14, vidport);
	221	outb(0xff & (pos >> 9), vidport+1);
	222	outb(15, vidport);
	223	outb(0xff & (pos >> 1), vidport+1);
1da177e4 LT	224	}
1da177e4 LT	225
e605a425 JM	226	static void debug_putstr(const char *s)
	227	{
	228	if (debug)
	229	putstr(s);
	230	}
	231
6175ddf0	232	void memset(void s, int c, size_t n)
1da177e4 LT	233	{
1da177e4 LT	234	int i;
ade1af77	235	char *ss = s;
1da177e4	236
020878ac PC	237	for (i = 0; i < n; i++)
020878ac PC	238	ss[i] = c;
1da177e4 LT	239	return s;
1da177e4 LT	240	}
68f4d5a0	241	#ifdef CONFIG_X86_32
6175ddf0	242	void memcpy(void dest, const void *src, size_t n)
1da177e4	243	{
68f4d5a0 ZY	244	int d0, d1, d2;
	245	asm volatile(
	246	"rep ; movsl\n\t"
	247	"movl %4,%%ecx\n\t"
	248	"rep ; movsb\n\t"
	249	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
	250	: "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src)
	251	: "memory");
1da177e4	252
b79c4df7	253	return dest;
1da177e4	254	}
68f4d5a0 ZY	255	#else
	256	void memcpy(void dest, const void *src, size_t n)
	257	{
	258	long d0, d1, d2;
	259	asm volatile(
	260	"rep ; movsq\n\t"
	261	"movq %4,%%rcx\n\t"
	262	"rep ; movsb\n\t"
	263	: "=&c" (d0), "=&D" (d1), "=&S" (d2)
	264	: "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src)
	265	: "memory");
1da177e4	266
68f4d5a0 ZY	267	return dest;
	268	}
	269	#endif
1da177e4 LT	270
	271	static void error(char *x)
	272	{
6bcb13b3 BC	273	__putstr(1, "\n\n");
	274	__putstr(1, x);
	275	__putstr(1, "\n\n -- System halted");
1da177e4	276
ff3cf856 IM	277	while (1)
ff3cf856 IM	278	asm("hlt");
1da177e4 LT	279	}
1da177e4 LT	280
099e1377 IC	281	static void parse_elf(void *output)
	282	{
	283	#ifdef CONFIG_X86_64
	284	Elf64_Ehdr ehdr;
	285	Elf64_Phdr phdrs, phdr;
	286	#else
	287	Elf32_Ehdr ehdr;
	288	Elf32_Phdr phdrs, phdr;
	289	#endif
	290	void *dest;
	291	int i;
	292
	293	memcpy(&ehdr, output, sizeof(ehdr));
fd77c7ca	294	if (ehdr.e_ident[EI_MAG0] != ELFMAG0 \|\|
099e1377 IC	295	ehdr.e_ident[EI_MAG1] != ELFMAG1 \|\|
099e1377 IC	296	ehdr.e_ident[EI_MAG2] != ELFMAG2 \|\|
fd77c7ca	297	ehdr.e_ident[EI_MAG3] != ELFMAG3) {
099e1377 IC	298	error("Kernel is not a valid ELF file");
	299	return;
	300	}
	301
e605a425	302	debug_putstr("Parsing ELF... ");
099e1377 IC	303
	304	phdrs = malloc(sizeof(phdrs) ehdr.e_phnum);
	305	if (!phdrs)
	306	error("Failed to allocate space for phdrs");
	307
	308	memcpy(phdrs, output + ehdr.e_phoff, sizeof(phdrs) ehdr.e_phnum);
	309
fd77c7ca	310	for (i = 0; i < ehdr.e_phnum; i++) {
099e1377 IC	311	phdr = &phdrs[i];
	312
	313	switch (phdr->p_type) {
	314	case PT_LOAD:
	315	#ifdef CONFIG_RELOCATABLE
	316	dest = output;
	317	dest += (phdr->p_paddr - LOAD_PHYSICAL_ADDR);
	318	#else
fd77c7ca	319	dest = (void *)(phdr->p_paddr);
099e1377 IC	320	#endif
	321	memcpy(dest,
	322	output + phdr->p_offset,
	323	phdr->p_filesz);
	324	break;
	325	default: /* Ignore other PT_* */ break;
	326	}
	327	}
5067cf53 JJ	328
5067cf53 JJ	329	free(phdrs);
099e1377 IC	330	}
099e1377 IC	331
778cb929	332	asmlinkage void decompress_kernel(void *rmode, memptr heap,
1180e01d IM	333	unsigned char *input_data,
	334	unsigned long input_len,
	335	unsigned char *output)
1da177e4 LT	336	{
	337	real_mode = rmode;
	338
8fee13a4 YL	339	if (cmdline_find_option_bool("debug"))
8fee13a4 YL	340	debug = 1;
3b6b9293	341
23968f71	342	if (real_mode->screen_info.orig_video_mode == 7) {
1da177e4 LT	343	vidmem = (char *) 0xb0000;
	344	vidport = 0x3b4;
	345	} else {
	346	vidmem = (char *) 0xb8000;
	347	vidport = 0x3d4;
	348	}
	349
23968f71 KH	350	lines = real_mode->screen_info.orig_video_lines;
23968f71 KH	351	cols = real_mode->screen_info.orig_video_cols;
1da177e4	352
8fee13a4	353	console_init();
e605a425	354	debug_putstr("early console in decompress_kernel\n");
8fee13a4	355
4c83d653	356	free_mem_ptr = heap; /* Heap */
7c539764	357	free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
968de4f0	358
7ed42a28 PA	359	if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
7ed42a28 PA	360	error("Destination address inappropriately aligned");
778cb929	361	#ifdef CONFIG_X86_64
7ed42a28	362	if (heap > 0x3fffffffffffUL)
778cb929 IC	363	error("Destination address too large");
778cb929 IC	364	#else
147dd561	365	if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff))
968de4f0	366	error("Destination address too large");
7ed42a28	367	#endif
968de4f0	368	#ifndef CONFIG_RELOCATABLE
7ed42a28	369	if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
968de4f0 EB	370	error("Wrong destination address");
968de4f0 EB	371	#endif
1da177e4	372
e605a425	373	debug_putstr("\nDecompressing Linux... ");
ae03c499	374	decompress(input_data, input_len, NULL, NULL, output, NULL, error);
099e1377	375	parse_elf(output);
e605a425	376	debug_putstr("done.\nBooting the kernel.\n");
968de4f0	377	return;
1da177e4	378	}