1 // SPDX-License-Identifier: GPL-2.0
3 * arch/sh/boot/compressed/misc.c
5 * This is a collection of several routines from gzip-1.0.3
8 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
10 * Adapted for SH by Stuart Menefy, Aug 1999
12 * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
15 #include <linux/uaccess.h>
16 #include <asm/addrspace.h>
27 #define memzero(s, n) memset ((s), 0, (n))
30 #define CACHE_ENABLE 0
31 #define CACHE_DISABLE 1
32 int cache_control(unsigned int command);
34 extern char input_data[];
36 static unsigned char *output;
38 static void error(char *m);
40 int puts(const char *);
42 extern int _text; /* Defined in vmlinux.lds.S */
44 static unsigned long free_mem_ptr;
45 static unsigned long free_mem_end_ptr;
47 #ifdef CONFIG_HAVE_KERNEL_BZIP2
48 #define HEAP_SIZE 0x400000
50 #define HEAP_SIZE 0x10000
53 #ifdef CONFIG_KERNEL_GZIP
54 #include "../../../../lib/decompress_inflate.c"
57 #ifdef CONFIG_KERNEL_BZIP2
58 #include "../../../../lib/decompress_bunzip2.c"
61 #ifdef CONFIG_KERNEL_LZMA
62 #include "../../../../lib/decompress_unlzma.c"
65 #ifdef CONFIG_KERNEL_XZ
66 #include "../../../../lib/decompress_unxz.c"
69 #ifdef CONFIG_KERNEL_LZO
70 #include "../../../../lib/decompress_unlzo.c"
73 int puts(const char *s)
75 /* This should be updated to use the sh-sci routines */
79 void* memset(void* s, int c, size_t n)
84 for (i=0;i<n;i++) ss[i] = c;
88 void* memcpy(void* __dest, __const void* __src,
92 char *d = (char *)__dest, *s = (char *)__src;
94 for (i=0;i<__n;i++) d[i] = s[i];
98 static void error(char *x)
102 puts("\n\n -- System halted");
107 const unsigned long __stack_chk_guard = 0x000a0dff;
109 void __stack_chk_fail(void)
111 error("stack-protector: Kernel stack is corrupted\n");
114 /* Needed because vmlinux.lds.h references this */
115 void ftrace_stub(void)
121 #define STACK_SIZE (4096)
122 long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
123 long *stack_start = &user_stack[STACK_SIZE];
125 void decompress_kernel(void)
127 unsigned long output_addr;
129 output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
130 #if defined(CONFIG_29BIT)
131 output_addr |= P2SEG;
134 output = (unsigned char *)output_addr;
135 free_mem_ptr = (unsigned long)&_end;
136 free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
138 puts("Uncompressing Linux... ");
139 cache_control(CACHE_ENABLE);
140 __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
141 cache_control(CACHE_DISABLE);
142 puts("Ok, booting the kernel.\n");