arch/sh/boot/compressed/misc.c

Source file repositories/reference/linux-study-clean/arch/sh/boot/compressed/misc.c

File Facts

System
Linux kernel
Corpus path
arch/sh/boot/compressed/misc.c
Extension
.c
Size
2710 bytes
Lines
142
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/boot/compressed/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
 *
 * Adapted for SH by Stuart Menefy, Aug 1999
 *
 * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
 */

#include <linux/uaccess.h>
#include <asm/addrspace.h>
#include <asm/page.h>

#include "misc.h"

/*
 * gzip declarations
 */

#define STATIC static

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

extern char input_data[];
extern int input_len;
static unsigned char *output;

static void error(char *m);

int puts(const char *);

extern int _text;		/* Defined in vmlinux.lds.S */
extern int _end;
static unsigned long free_mem_ptr;
static unsigned long free_mem_end_ptr;

#ifdef CONFIG_HAVE_KERNEL_BZIP2
#define HEAP_SIZE	0x400000
#else
#define HEAP_SIZE	0x10000
#endif

#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

int puts(const char *s)
{
	/* This should be updated to use the sh-sci routines */
	return 0;
}

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

	for (i=0;i<n;i++) ss[i] = c;
	return s;
}

void* memcpy(void* __dest, __const void* __src,
			    size_t __n)
{
	int i;
	char *d = (char *)__dest, *s = (char *)__src;

Annotation

Implementation Notes