150 lines
2.7 KiB
C
150 lines
2.7 KiB
C
/*
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* arch/sh/boot/compressed/misc.c
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*
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* This is a collection of several routines from gzip-1.0.3
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* adapted for Linux.
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*
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* malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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*
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* Adapted for SH by Stuart Menefy, Aug 1999
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*
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* Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
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*/
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#include <asm/uaccess.h>
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#include <asm/addrspace.h>
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#include <asm/page.h>
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#include <asm/sh_bios.h>
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/*
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* gzip declarations
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*/
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#define STATIC static
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#undef memset
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#undef memcpy
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#define memzero(s, n) memset ((s), 0, (n))
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/* cache.c */
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#define CACHE_ENABLE 0
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#define CACHE_DISABLE 1
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int cache_control(unsigned int command);
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extern char input_data[];
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extern int input_len;
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static unsigned char *output;
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static void error(char *m);
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int puts(const char *);
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extern int _text; /* Defined in vmlinux.lds.S */
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extern int _end;
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static unsigned long free_mem_ptr;
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static unsigned long free_mem_end_ptr;
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#ifdef CONFIG_HAVE_KERNEL_BZIP2
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#define HEAP_SIZE 0x400000
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#else
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#define HEAP_SIZE 0x10000
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#endif
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#ifdef CONFIG_KERNEL_GZIP
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#include "../../../../lib/decompress_inflate.c"
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#endif
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#ifdef CONFIG_KERNEL_BZIP2
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#include "../../../../lib/decompress_bunzip2.c"
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#endif
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#ifdef CONFIG_KERNEL_LZMA
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#include "../../../../lib/decompress_unlzma.c"
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#endif
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#ifdef CONFIG_SH_STANDARD_BIOS
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size_t strlen(const char *s)
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{
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int i = 0;
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while (*s++)
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i++;
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return i;
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}
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int puts(const char *s)
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{
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int len = strlen(s);
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sh_bios_console_write(s, len);
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return len;
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}
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#else
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int puts(const char *s)
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{
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/* This should be updated to use the sh-sci routines */
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return 0;
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}
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#endif
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void* memset(void* s, int c, size_t n)
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{
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int i;
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char *ss = (char*)s;
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for (i=0;i<n;i++) ss[i] = c;
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return s;
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}
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void* memcpy(void* __dest, __const void* __src,
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size_t __n)
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{
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int i;
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char *d = (char *)__dest, *s = (char *)__src;
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for (i=0;i<__n;i++) d[i] = s[i];
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return __dest;
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}
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static void error(char *x)
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{
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puts("\n\n");
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puts(x);
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puts("\n\n -- System halted");
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while(1); /* Halt */
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}
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#ifdef CONFIG_SUPERH64
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#define stackalign 8
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#else
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#define stackalign 4
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#endif
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#define STACK_SIZE (4096)
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long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
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long *stack_start = &user_stack[STACK_SIZE];
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void decompress_kernel(void)
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{
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unsigned long output_addr;
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#ifdef CONFIG_SUPERH64
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output_addr = (CONFIG_MEMORY_START + 0x2000);
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#else
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output_addr = PHYSADDR((unsigned long)&_text+PAGE_SIZE);
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#ifdef CONFIG_29BIT
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output_addr |= P2SEG;
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#endif
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#endif
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output = (unsigned char *)output_addr;
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free_mem_ptr = (unsigned long)&_end;
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free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
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puts("Uncompressing Linux... ");
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cache_control(CACHE_ENABLE);
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decompress(input_data, input_len, NULL, NULL, output, NULL, error);
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cache_control(CACHE_DISABLE);
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puts("Ok, booting the kernel.\n");
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}
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