4 * This is a collection of several routines from gzip-1.0.3
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
9 * Modified for ARM Linux by Russell King
11 * Nicolas Pitre <nico@visuaide.com> 1999/04/14 :
12 * For this code to run directly from Flash, all constant variables must
13 * be marked with 'const' and all other variables initialized at run-time
14 * only. This way all non constant variables will end up in the bss segment,
15 * which should point to addresses in RAM and cleared to 0 on start.
16 * This allows for a much quicker boot time.
19 unsigned int __machine_arch_type;
21 #define _LINUX_STRING_H_
23 #include <linux/compiler.h> /* for inline */
24 #include <linux/types.h> /* for size_t */
25 #include <linux/stddef.h> /* for NULL */
26 #include <linux/linkage.h>
27 #include <asm/string.h>
30 static void putstr(const char *ptr);
31 extern void error(char *x);
33 #include <mach/uncompress.h>
35 #ifdef CONFIG_DEBUG_ICEDCC
37 #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7)
39 static void icedcc_putc(int ch)
41 int status, i = 0x4000000;
47 asm volatile ("mrc p14, 0, %0, c0, c1, 0" : "=r" (status));
48 } while (status & (1 << 29));
50 asm("mcr p14, 0, %0, c0, c5, 0" : : "r" (ch));
54 #elif defined(CONFIG_CPU_XSCALE)
56 static void icedcc_putc(int ch)
58 int status, i = 0x4000000;
64 asm volatile ("mrc p14, 0, %0, c14, c0, 0" : "=r" (status));
65 } while (status & (1 << 28));
67 asm("mcr p14, 0, %0, c8, c0, 0" : : "r" (ch));
72 static void icedcc_putc(int ch)
74 int status, i = 0x4000000;
80 asm volatile ("mrc p14, 0, %0, c0, c0, 0" : "=r" (status));
83 asm("mcr p14, 0, %0, c1, c0, 0" : : "r" (ch));
88 #define putc(ch) icedcc_putc(ch)
91 static void putstr(const char *ptr)
95 while ((c = *ptr++) != '\0') {
105 void *memcpy(void *__dest, __const void *__src, size_t __n)
108 unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
110 for (i = __n >> 3; i > 0; i--) {
142 extern char input_data[];
143 extern char input_data_end[];
145 unsigned char *output_data;
147 unsigned long free_mem_ptr;
148 unsigned long free_mem_end_ptr;
151 #define arch_error(x)
160 putstr("\n\n -- System halted");
165 asmlinkage void __div0(void)
167 error("Attempting division by 0!");
170 extern int do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
174 decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
175 unsigned long free_mem_ptr_end_p,
180 output_data = (unsigned char *)output_start;
181 free_mem_ptr = free_mem_ptr_p;
182 free_mem_end_ptr = free_mem_ptr_end_p;
183 __machine_arch_type = arch_id;
187 putstr("Uncompressing Linux...");
188 ret = do_decompress(input_data, input_data_end - input_data,
191 error("decompressor returned an error");
193 putstr(" done, booting the kernel.\n");