1 /* 2 * arch/sh/boot/compressed/misc.c 3 * 4 * This is a collection of several routines from gzip-1.0.3 5 * adapted for Linux. 6 * 7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994 8 * 9 * Adapted for SH by Stuart Menefy, Aug 1999 10 * 11 * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000 12 */ 13 14 #include <asm/uaccess.h> 15 #include <asm/addrspace.h> 16 #include <asm/page.h> 17 #include <asm/sh_bios.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_SH_STANDARD_BIOS 66 size_t strlen(const char *s) 67 { 68 int i = 0; 69 70 while (*s++) 71 i++; 72 return i; 73 } 74 75 int puts(const char *s) 76 { 77 int len = strlen(s); 78 sh_bios_console_write(s, len); 79 return len; 80 } 81 #else 82 int puts(const char *s) 83 { 84 /* This should be updated to use the sh-sci routines */ 85 return 0; 86 } 87 #endif 88 89 void* memset(void* s, int c, size_t n) 90 { 91 int i; 92 char *ss = (char*)s; 93 94 for (i=0;i<n;i++) ss[i] = c; 95 return s; 96 } 97 98 void* memcpy(void* __dest, __const void* __src, 99 size_t __n) 100 { 101 int i; 102 char *d = (char *)__dest, *s = (char *)__src; 103 104 for (i=0;i<__n;i++) d[i] = s[i]; 105 return __dest; 106 } 107 108 static void error(char *x) 109 { 110 puts("\n\n"); 111 puts(x); 112 puts("\n\n -- System halted"); 113 114 while(1); /* Halt */ 115 } 116 117 #ifdef CONFIG_SUPERH64 118 #define stackalign 8 119 #else 120 #define stackalign 4 121 #endif 122 123 #define STACK_SIZE (4096) 124 long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE]; 125 long *stack_start = &user_stack[STACK_SIZE]; 126 127 void decompress_kernel(void) 128 { 129 unsigned long output_addr; 130 131 #ifdef CONFIG_SUPERH64 132 output_addr = (CONFIG_MEMORY_START + 0x2000); 133 #else 134 output_addr = PHYSADDR((unsigned long)&_text+PAGE_SIZE); 135 #ifdef CONFIG_29BIT 136 output_addr |= P2SEG; 137 #endif 138 #endif 139 140 output = (unsigned char *)output_addr; 141 free_mem_ptr = (unsigned long)&_end; 142 free_mem_end_ptr = free_mem_ptr + HEAP_SIZE; 143 144 puts("Uncompressing Linux... "); 145 cache_control(CACHE_ENABLE); 146 decompress(input_data, input_len, NULL, NULL, output, NULL, error); 147 cache_control(CACHE_DISABLE); 148 puts("Ok, booting the kernel.\n"); 149 } 150