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linux/arch/mn10300/boot/compressed/misc.c
David Howells 1490cf5f0c MN10300: Don't try and #include <linux/slab.h> in lib/inflate.c from bootloader 
Don't try and #include <linux/slab.h> in lib/inflate.c from the bootloader code
as linux/slab.h hauls in function defs that aren't available in the bootloader
code and may also haul in conflicting functions.

To fix this, make the inclusion of linux/slab.h contingent on NO_INFLATE_MALLOC
as are the usages of kmalloc() and kfree().

In MN10300, this causes the following errors:

In file included from include/linux/string.h:21,
                 from include/linux/bitmap.h:8,
                 from include/linux/nodemask.h:93,
                 from include/linux/mmzone.h:16,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from arch/mn10300/boot/compressed/../../../../lib/inflate.c:106,
                 from arch/mn10300/boot/compressed/misc.c:170:
/warthog/am33/linux-2.6-mn10300/arch/mn10300/include/asm/string.h:19: error: conflicting types for 'memset'
arch/mn10300/boot/compressed/misc.c:59: error: previous definition of 'memset' was here

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-12 09:51:35 -07:00

394 lines
9.2 KiB
C
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/* 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;
}
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