Orange Pi5 kernel

// 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>
 
/*
 * gzip declarations
 */
 
#define STATIC static
 
#undef memset
#undef memcpy
#define memzero(s, n)     memset ((s), 0, (n))
 
/* cache.c */
#define CACHE_ENABLE      0
#define CACHE_DISABLE     1
int cache_control(unsigned int command);
 
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;
 
<------>for (i=0;i<__n;i++) d[i] = s[i];
<------>return __dest;
}
 
static void error(char *x)
{
<------>puts("\n\n");
<------>puts(x);
<------>puts("\n\n -- System halted");
 
<------>while(1);	/* Halt */
}
 
const unsigned long __stack_chk_guard = 0x000a0dff;
 
void __stack_chk_fail(void)
{
<------>error("stack-protector: Kernel stack is corrupted\n");
}
 
/* Needed because vmlinux.lds.h references this */
void ftrace_stub(void)
{
}
 
#define stackalign	4
 
#define STACK_SIZE (4096)
long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
long *stack_start = &user_stack[STACK_SIZE];
 
void decompress_kernel(void)
{
<------>unsigned long output_addr;
 
<------>output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
#if defined(CONFIG_29BIT)
<------>output_addr |= P2SEG;
#endif
 
<------>output = (unsigned char *)output_addr;
<------>free_mem_ptr = (unsigned long)&_end;
<------>free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
 
<------>puts("Uncompressing Linux... ");
<------>cache_control(CACHE_ENABLE);
<------>__decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
<------>cache_control(CACHE_DISABLE);
<------>puts("Ok, booting the kernel.\n");
}