1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * arch/sh/boot/compressed/misc.c 4 * 5 * This is a collection of several routines from gzip-1.0.3 6 * adapted for Linux. 7 * 8 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 9 * 10 * Adapted for SH by Stuart Menefy, Aug 1999 11 * 12 * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000 13 */ 14 15 #include <linux/uaccess.h> 16 #include <asm/addrspace.h> 17 #include <asm/page.h> 18 19 /* 20 * gzip declarations 21 */ 22 23 #define STATIC static 24 25 #undef memset 26 #undef memcpy 27 #define memzero(s, n) memset ((s), 0, (n)) 28 29 /* cache.c */ 30 #define CACHE_ENABLE 0 31 #define CACHE_DISABLE 1 32 int cache_control(unsigned int command); 33 34 extern char input_data[]; 35 extern int input_len; 36 static unsigned char *output; 37 38 static void error(char *m); 39 40 int puts(const char *); 41 42 extern int _text; /* Defined in vmlinux.lds.S */ 43 extern int _end; 44 static unsigned long free_mem_ptr; 45 static unsigned long free_mem_end_ptr; 46 47 #ifdef CONFIG_HAVE_KERNEL_BZIP2 48 #define HEAP_SIZE 0x400000 49 #else 50 #define HEAP_SIZE 0x10000 51 #endif 52 53 #ifdef CONFIG_KERNEL_GZIP 54 #include "../../../../lib/decompress_inflate.c" 55 #endif 56 57 #ifdef CONFIG_KERNEL_BZIP2 58 #include "../../../../lib/decompress_bunzip2.c" 59 #endif 60 61 #ifdef CONFIG_KERNEL_LZMA 62 #include "../../../../lib/decompress_unlzma.c" 63 #endif 64 65 #ifdef CONFIG_KERNEL_XZ 66 #include "../../../../lib/decompress_unxz.c" 67 #endif 68 69 #ifdef CONFIG_KERNEL_LZO 70 #include "../../../../lib/decompress_unlzo.c" 71 #endif 72 73 int puts(const char *s) 74 { 75 /* This should be updated to use the sh-sci routines */ 76 return 0; 77 } 78 79 void* memset(void* s, int c, size_t n) 80 { 81 int i; 82 char *ss = (char*)s; 83 84 for (i=0;i<n;i++) ss[i] = c; 85 return s; 86 } 87 88 void* memcpy(void* __dest, __const void* __src, 89 size_t __n) 90 { 91 int i; 92 char *d = (char *)__dest, *s = (char *)__src; 93 94 for (i=0;i<__n;i++) d[i] = s[i]; 95 return __dest; 96 } 97 98 static void error(char *x) 99 { 100 puts("\n\n"); 101 puts(x); 102 puts("\n\n -- System halted"); 103 104 while(1); /* Halt */ 105 } 106 107 const unsigned long __stack_chk_guard = 0x000a0dff; 108 109 void __stack_chk_fail(void) 110 { 111 error("stack-protector: Kernel stack is corrupted\n"); 112 } 113 114 /* Needed because vmlinux.lds.h references this */ 115 void ftrace_stub(void) 116 { 117 } 118 void arch_ftrace_ops_list_func(void) 119 { 120 } 121 122 #define stackalign 4 123 124 #define STACK_SIZE (4096) 125 long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE]; 126 long *stack_start = &user_stack[STACK_SIZE]; 127 128 void decompress_kernel(void) 129 { 130 unsigned long output_addr; 131 132 output_addr = __pa((unsigned long)&_text+PAGE_SIZE); 133 #if defined(CONFIG_29BIT) 134 output_addr |= P2SEG; 135 #endif 136 137 output = (unsigned char *)output_addr; 138 free_mem_ptr = (unsigned long)&_end; 139 free_mem_end_ptr = free_mem_ptr + HEAP_SIZE; 140 141 puts("Uncompressing Linux... "); 142 cache_control(CACHE_ENABLE); 143 __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error); 144 cache_control(CACHE_DISABLE); 145 puts("Ok, booting the kernel.\n"); 146 } 147