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Diffstat (limited to 'arch/mn10300/boot/compressed/misc.c')
| -rw-r--r-- | arch/mn10300/boot/compressed/misc.c | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/arch/mn10300/boot/compressed/misc.c b/arch/mn10300/boot/compressed/misc.c deleted file mode 100644 index 42cbd77bd439..000000000000 --- a/arch/mn10300/boot/compressed/misc.c +++ /dev/null @@ -1,393 +0,0 @@ -/* MN10300 Miscellaneous helper routines for kernel decompressor - * - * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. - * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. - * Modified by David Howells (dhowells@redhat.com) - * - Derived from arch/x86/boot/compressed/misc_32.c - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public Licence - * as published by the Free Software Foundation; either version - * 2 of the Licence, or (at your option) any later version. - */ -#include <linux/compiler.h> -#include <asm/serial-regs.h> -#include "misc.h" - -#ifndef CONFIG_GDBSTUB_ON_TTYSx -/* display 'Uncompressing Linux... ' messages on ttyS0 or ttyS1 */ -#if 1 /* ttyS0 */ -#define CYG_DEV_BASE 0xA6FB0000 -#else /* ttyS1 */ -#define CYG_DEV_BASE 0xA6FC0000 -#endif - -#define CYG_DEV_THR (*((volatile __u8*)(CYG_DEV_BASE + 0x00))) -#define CYG_DEV_MCR (*((volatile __u8*)(CYG_DEV_BASE + 0x10))) -#define SIO_MCR_DTR 0x01 -#define SIO_MCR_RTS 0x02 -#define CYG_DEV_LSR (*((volatile __u8*)(CYG_DEV_BASE + 0x14))) -#define SIO_LSR_THRE 0x20 /* transmitter holding register empty */ -#define SIO_LSR_TEMT 0x40 /* transmitter register empty */ -#define CYG_DEV_MSR (*((volatile __u8*)(CYG_DEV_BASE + 0x18))) -#define SIO_MSR_CTS 0x10 /* clear to send */ -#define SIO_MSR_DSR 0x20 /* data set ready */ - -#define LSR_WAIT_FOR(STATE) \ - do { while (!(CYG_DEV_LSR & SIO_LSR_##STATE)) {} } while (0) -#define FLOWCTL_QUERY(LINE) \ - ({ CYG_DEV_MSR & SIO_MSR_##LINE; }) -#define FLOWCTL_WAIT_FOR(LINE) \ - do { while (!(CYG_DEV_MSR & SIO_MSR_##LINE)) {} } while (0) -#define FLOWCTL_CLEAR(LINE) \ - do { CYG_DEV_MCR &= ~SIO_MCR_##LINE; } while (0) -#define FLOWCTL_SET(LINE) \ - do { CYG_DEV_MCR |= SIO_MCR_##LINE; } while (0) -#endif - -/* - * gzip declarations - */ - -#define OF(args) args -#define STATIC static - -#undef memset -#undef memcpy - -static inline void *memset(const void *s, int c, size_t n) -{ - int i; - char *ss = (char *) s; - - for (i = 0; i < n; i++) - ss[i] = c; - return (void *)s; -} - -#define memzero(s, n) memset((s), 0, (n)) - -static inline void *memcpy(void *__dest, const void *__src, size_t __n) -{ - int i; - const char *s = __src; - char *d = __dest; - - for (i = 0; i < __n; i++) - d[i] = s[i]; - return __dest; -} - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -#define WSIZE 0x8000 /* Window size must be at least 32k, and a power of - * two */ - -static uch *inbuf; /* input buffer */ -static uch window[WSIZE]; /* sliding window buffer */ - -static unsigned insize; /* valid bytes in inbuf */ -static unsigned inptr; /* index of next byte to be processed in inbuf */ -static unsigned outcnt; /* bytes in output buffer */ - -/* gzip flag byte */ -#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */ -#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */ -#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ -#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ -#define COMMENT 0x10 /* bit 4 set: file comment present */ -#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */ -#define RESERVED 0xC0 /* bit 6,7: reserved */ - -/* Diagnostic functions */ -#ifdef DEBUG -# define Assert(cond, msg) { if (!(cond)) error(msg); } -# define Trace(x) fprintf x -# define Tracev(x) { if (verbose) fprintf x ; } -# define Tracevv(x) { if (verbose > 1) fprintf x ; } -# define Tracec(c, x) { if (verbose && (c)) fprintf x ; } -# define Tracecv(c, x) { if (verbose > 1 && (c)) fprintf x ; } -#else -# define Assert(cond, msg) -# define Trace(x) -# define Tracev(x) -# define Tracevv(x) -# define Tracec(c, x) -# define Tracecv(c, x) -#endif - -static int fill_inbuf(void); -static void flush_window(void); -static void error(const char *) __attribute__((noreturn)); -static void kputs(const char *); - -static inline unsigned char get_byte(void) -{ - unsigned char ch = inptr < insize ? inbuf[inptr++] : fill_inbuf(); - -#if 0 - char hex[3]; - hex[0] = ((ch & 0x0f) > 9) ? - ((ch & 0x0f) + 'A' - 0xa) : ((ch & 0x0f) + '0'); - hex[1] = ((ch >> 4) > 9) ? - ((ch >> 4) + 'A' - 0xa) : ((ch >> 4) + '0'); - hex[2] = 0; - kputs(hex); -#endif - return ch; -} - -/* - * This is set up by the setup-routine at boot-time - */ -#define EXT_MEM_K (*(unsigned short *)0x90002) -#ifndef STANDARD_MEMORY_BIOS_CALL -#define ALT_MEM_K (*(unsigned long *) 0x901e0) -#endif -#define SCREEN_INFO (*(struct screen_info *)0x90000) - -static long bytes_out; -static uch *output_data; -static unsigned long output_ptr; - - -static unsigned long free_mem_ptr = (unsigned long) &end; -static unsigned long free_mem_end_ptr = (unsigned long) &end + 0x90000; - -#define INPLACE_MOVE_ROUTINE 0x1000 -#define LOW_BUFFER_START 0x2000 -#define LOW_BUFFER_END 0x90000 -#define LOW_BUFFER_SIZE (LOW_BUFFER_END - LOW_BUFFER_START) -#define HEAP_SIZE 0x3000 -static int high_loaded; -static uch *high_buffer_start /* = (uch *)(((ulg)&end) + HEAP_SIZE)*/; - -static char *vidmem = (char *)0xb8000; -static int lines, cols; - -#define BOOTLOADER_INFLATE -#include "../../../../lib/inflate.c" - -static inline void scroll(void) -{ - int i; - - memcpy(vidmem, vidmem + cols * 2, (lines - 1) * cols * 2); - for (i = (lines - 1) * cols * 2; i < lines * cols * 2; i += 2) - vidmem[i] = ' '; -} - -static inline void kputchar(unsigned char ch) -{ -#ifdef CONFIG_MN10300_UNIT_ASB2305 - while (SC0STR & SC01STR_TBF) - continue; - - if (ch == 0x0a) { - SC0TXB = 0x0d; - while (SC0STR & SC01STR_TBF) - continue; - } - - SC0TXB = ch; - -#else - while (SC1STR & SC01STR_TBF) - continue; - - if (ch == 0x0a) { - SC1TXB = 0x0d; - while (SC1STR & SC01STR_TBF) - continue; - } - - SC1TXB = ch; - -#endif -} - -static void kputs(const char *s) -{ -#ifdef CONFIG_DEBUG_DECOMPRESS_KERNEL -#ifndef CONFIG_GDBSTUB_ON_TTYSx - char ch; - - FLOWCTL_SET(DTR); - - while (*s) { - LSR_WAIT_FOR(THRE); - - ch = *s++; - if (ch == 0x0a) { - CYG_DEV_THR = 0x0d; - LSR_WAIT_FOR(THRE); - } - CYG_DEV_THR = ch; - } - - FLOWCTL_CLEAR(DTR); -#else - - for (; *s; s++) - kputchar(*s); - -#endif -#endif /* CONFIG_DEBUG_DECOMPRESS_KERNEL */ -} - -/* =========================================================================== - * Fill the input buffer. This is called only when the buffer is empty - * and at least one byte is really needed. - */ -static int fill_inbuf() -{ - if (insize != 0) - error("ran out of input data\n"); - - inbuf = input_data; - insize = input_len; - inptr = 1; - return inbuf[0]; -} - -/* =========================================================================== - * Write the output window window[0..outcnt-1] and update crc and bytes_out. - * (Used for the decompressed data only.) - */ -static void flush_window_low(void) -{ - ulg c = crc; /* temporary variable */ - unsigned n; - uch *in, *out, ch; - - in = window; - out = &output_data[output_ptr]; - for (n = 0; n < outcnt; n++) { - ch = *out++ = *in++; - c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); - } - crc = c; - bytes_out += (ulg)outcnt; - output_ptr += (ulg)outcnt; - outcnt = 0; -} - -static void flush_window_high(void) -{ - ulg c = crc; /* temporary variable */ - unsigned n; - uch *in, ch; - in = window; - for (n = 0; n < outcnt; n++) { - ch = *output_data++ = *in++; - if ((ulg) output_data == LOW_BUFFER_END) - output_data = high_buffer_start; - c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); - } - crc = c; - bytes_out += (ulg)outcnt; - outcnt = 0; -} - -static void flush_window(void) -{ - if (high_loaded) - flush_window_high(); - else - flush_window_low(); -} - -static void error(const char *x) -{ - kputs("\n\n"); - kputs(x); - kputs("\n\n -- System halted"); - - while (1) - /* Halt */; -} - -#define STACK_SIZE (4096) - -long user_stack[STACK_SIZE]; - -struct { - long *a; - short b; -} stack_start = { &user_stack[STACK_SIZE], 0 }; - -void setup_normal_output_buffer(void) -{ -#ifdef STANDARD_MEMORY_BIOS_CALL - if (EXT_MEM_K < 1024) - error("Less than 2MB of memory.\n"); -#else - if ((ALT_MEM_K > EXT_MEM_K ? ALT_MEM_K : EXT_MEM_K) < 1024) - error("Less than 2MB of memory.\n"); -#endif - output_data = (char *) 0x100000; /* Points to 1M */ -} - -struct moveparams { - uch *low_buffer_start; - int lcount; - uch *high_buffer_start; - int hcount; -}; - -void setup_output_buffer_if_we_run_high(struct moveparams *mv) -{ - high_buffer_start = (uch *)(((ulg) &end) + HEAP_SIZE); -#ifdef STANDARD_MEMORY_BIOS_CALL - if (EXT_MEM_K < (3 * 1024)) - error("Less than 4MB of memory.\n"); -#else - if ((ALT_MEM_K > EXT_MEM_K ? ALT_MEM_K : EXT_MEM_K) < (3 * 1024)) - error("Less than 4MB of memory.\n"); -#endif - mv->low_buffer_start = output_data = (char *) LOW_BUFFER_START; - high_loaded = 1; - free_mem_end_ptr = (long) high_buffer_start; - if (0x100000 + LOW_BUFFER_SIZE > (ulg) high_buffer_start) { - high_buffer_start = (uch *)(0x100000 + LOW_BUFFER_SIZE); - mv->hcount = 0; /* say: we need not to move high_buffer */ - } else { - mv->hcount = -1; - } - mv->high_buffer_start = high_buffer_start; -} - -void close_output_buffer_if_we_run_high(struct moveparams *mv) -{ - mv->lcount = bytes_out; - if (bytes_out > LOW_BUFFER_SIZE) { - mv->lcount = LOW_BUFFER_SIZE; - if (mv->hcount) - mv->hcount = bytes_out - LOW_BUFFER_SIZE; - } else { - mv->hcount = 0; - } -} - -#undef DEBUGFLAG -#ifdef DEBUGFLAG -int debugflag; -#endif - -int decompress_kernel(struct moveparams *mv) -{ -#ifdef DEBUGFLAG - while (!debugflag) - barrier(); -#endif - - output_data = (char *) CONFIG_KERNEL_TEXT_ADDRESS; - - makecrc(); - kputs("Uncompressing Linux... "); - gunzip(); - kputs("Ok, booting the kernel.\n"); - return 0; -} |