552 lines
9.7 KiB
C
552 lines
9.7 KiB
C
/*
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* Misc. bootloader code (almost) all platforms can use
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*
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* Author: Johnnie Peters <jpeters@mvista.com>
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* Editor: Tom Rini <trini@mvista.com>
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*
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* Derived from arch/ppc/boot/prep/misc.c
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*
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* 2000-2001 (c) MontaVista, Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <stdarg.h> /* for va_ bits */
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#include <linux/config.h>
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#include <linux/string.h>
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#include <linux/zlib.h>
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#include "nonstdio.h"
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/* If we're on a PReP, assume we have a keyboard controller
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* Also note, if we're not PReP, we assume you are a serial
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* console - Tom */
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#if defined(CONFIG_PPC_PREP) && defined(CONFIG_VGA_CONSOLE)
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extern void cursor(int x, int y);
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extern void scroll(void);
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extern char *vidmem;
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extern int lines, cols;
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extern int orig_x, orig_y;
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extern int keyb_present;
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extern int CRT_tstc(void);
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extern int CRT_getc(void);
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#else
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int cursor(int x, int y) {return 0;}
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void scroll(void) {}
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char vidmem[1];
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#define lines 0
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#define cols 0
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int orig_x = 0;
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int orig_y = 0;
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#define keyb_present 0
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int CRT_tstc(void) {return 0;}
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int CRT_getc(void) {return 0;}
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#endif
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extern char *avail_ram;
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extern char *end_avail;
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extern char _end[];
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void puts(const char *);
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void putc(const char c);
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void puthex(unsigned long val);
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void gunzip(void *, int, unsigned char *, int *);
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static int _cvt(unsigned long val, char *buf, long radix, char *digits);
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void _vprintk(void(*putc)(const char), const char *fmt0, va_list ap);
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unsigned char *ISA_io = NULL;
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#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
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extern unsigned long com_port;
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extern int serial_tstc(unsigned long com_port);
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extern unsigned char serial_getc(unsigned long com_port);
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extern void serial_putc(unsigned long com_port, unsigned char c);
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#endif
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void pause(void)
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{
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puts("pause\n");
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}
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void exit(void)
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{
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puts("exit\n");
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while(1);
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}
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int tstc(void)
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{
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#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
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if(keyb_present)
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return (CRT_tstc() || serial_tstc(com_port));
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else
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return (serial_tstc(com_port));
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#else
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return CRT_tstc();
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#endif
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}
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int getc(void)
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{
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while (1) {
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#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
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if (serial_tstc(com_port))
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return (serial_getc(com_port));
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#endif /* serial console */
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if (keyb_present)
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if(CRT_tstc())
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return (CRT_getc());
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}
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}
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void
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putc(const char c)
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{
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int x,y;
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#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
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serial_putc(com_port, c);
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if ( c == '\n' )
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serial_putc(com_port, '\r');
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#endif /* serial console */
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x = orig_x;
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y = orig_y;
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if ( c == '\n' ) {
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x = 0;
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if ( ++y >= lines ) {
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scroll();
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y--;
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}
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} else if (c == '\r') {
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x = 0;
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} else if (c == '\b') {
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if (x > 0) {
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x--;
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}
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} else {
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vidmem [ ( x + cols * y ) * 2 ] = c;
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if ( ++x >= cols ) {
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x = 0;
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if ( ++y >= lines ) {
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scroll();
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y--;
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}
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}
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}
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cursor(x, y);
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orig_x = x;
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orig_y = y;
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}
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void puts(const char *s)
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{
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int x,y;
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char c;
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x = orig_x;
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y = orig_y;
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while ( ( c = *s++ ) != '\0' ) {
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#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPC52xx_CONSOLE) \
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|| defined(CONFIG_SERIAL_MPSC_CONSOLE)
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serial_putc(com_port, c);
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if ( c == '\n' ) serial_putc(com_port, '\r');
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#endif /* serial console */
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if ( c == '\n' ) {
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x = 0;
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if ( ++y >= lines ) {
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scroll();
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y--;
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}
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} else if (c == '\b') {
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if (x > 0) {
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x--;
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}
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} else {
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vidmem [ ( x + cols * y ) * 2 ] = c;
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if ( ++x >= cols ) {
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x = 0;
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if ( ++y >= lines ) {
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scroll();
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y--;
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}
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}
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}
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}
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cursor(x, y);
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orig_x = x;
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orig_y = y;
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}
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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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static void *zalloc(unsigned size)
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{
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void *p = avail_ram;
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size = (size + 7) & -8;
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avail_ram += size;
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if (avail_ram > end_avail) {
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puts("oops... out of memory\n");
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pause();
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}
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return p;
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}
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#define HEAD_CRC 2
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#define EXTRA_FIELD 4
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#define ORIG_NAME 8
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#define COMMENT 0x10
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#define RESERVED 0xe0
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void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
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{
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z_stream s;
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int r, i, flags;
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/* skip header */
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i = 10;
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flags = src[3];
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if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
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puts("bad gzipped data\n");
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exit();
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}
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if ((flags & EXTRA_FIELD) != 0)
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i = 12 + src[10] + (src[11] << 8);
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if ((flags & ORIG_NAME) != 0)
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while (src[i++] != 0)
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;
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if ((flags & COMMENT) != 0)
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while (src[i++] != 0)
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;
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if ((flags & HEAD_CRC) != 0)
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i += 2;
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if (i >= *lenp) {
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puts("gunzip: ran out of data in header\n");
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exit();
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}
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/* Initialize ourself. */
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s.workspace = zalloc(zlib_inflate_workspacesize());
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r = zlib_inflateInit2(&s, -MAX_WBITS);
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if (r != Z_OK) {
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puts("zlib_inflateInit2 returned "); puthex(r); puts("\n");
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exit();
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}
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s.next_in = src + i;
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s.avail_in = *lenp - i;
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s.next_out = dst;
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s.avail_out = dstlen;
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r = zlib_inflate(&s, Z_FINISH);
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if (r != Z_OK && r != Z_STREAM_END) {
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puts("inflate returned "); puthex(r); puts("\n");
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exit();
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}
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*lenp = s.next_out - (unsigned char *) dst;
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zlib_inflateEnd(&s);
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}
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void
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puthex(unsigned long val)
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{
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unsigned char buf[10];
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int i;
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for (i = 7; i >= 0; i--)
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{
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buf[i] = "0123456789ABCDEF"[val & 0x0F];
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val >>= 4;
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}
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buf[8] = '\0';
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puts(buf);
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}
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#define FALSE 0
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#define TRUE 1
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void
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_printk(char const *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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_vprintk(putc, fmt, ap);
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va_end(ap);
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return;
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}
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#define is_digit(c) ((c >= '0') && (c <= '9'))
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void
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_vprintk(void(*putc)(const char), const char *fmt0, va_list ap)
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{
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char c, sign, *cp = 0;
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int left_prec, right_prec, zero_fill, length = 0, pad, pad_on_right;
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char buf[32];
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long val;
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while ((c = *fmt0++))
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{
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if (c == '%')
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{
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c = *fmt0++;
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left_prec = right_prec = pad_on_right = 0;
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if (c == '-')
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{
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c = *fmt0++;
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pad_on_right++;
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}
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if (c == '0')
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{
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zero_fill = TRUE;
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c = *fmt0++;
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} else
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{
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zero_fill = FALSE;
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}
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while (is_digit(c))
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{
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left_prec = (left_prec * 10) + (c - '0');
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c = *fmt0++;
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}
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if (c == '.')
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{
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c = *fmt0++;
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zero_fill++;
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while (is_digit(c))
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{
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right_prec = (right_prec * 10) + (c - '0');
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c = *fmt0++;
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}
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} else
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{
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right_prec = left_prec;
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}
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sign = '\0';
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switch (c)
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{
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case 'd':
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case 'x':
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case 'X':
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val = va_arg(ap, long);
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switch (c)
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{
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case 'd':
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if (val < 0)
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{
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sign = '-';
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val = -val;
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}
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length = _cvt(val, buf, 10, "0123456789");
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break;
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case 'x':
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length = _cvt(val, buf, 16, "0123456789abcdef");
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break;
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case 'X':
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length = _cvt(val, buf, 16, "0123456789ABCDEF");
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break;
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}
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cp = buf;
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break;
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case 's':
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cp = va_arg(ap, char *);
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length = strlen(cp);
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break;
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case 'c':
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c = va_arg(ap, long /*char*/);
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(*putc)(c);
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continue;
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default:
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(*putc)('?');
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}
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pad = left_prec - length;
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if (sign != '\0')
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{
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pad--;
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}
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if (zero_fill)
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{
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c = '0';
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if (sign != '\0')
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{
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(*putc)(sign);
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sign = '\0';
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}
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} else
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{
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c = ' ';
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}
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if (!pad_on_right)
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{
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while (pad-- > 0)
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{
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(*putc)(c);
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}
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}
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if (sign != '\0')
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{
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(*putc)(sign);
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}
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while (length-- > 0)
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{
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(*putc)(c = *cp++);
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if (c == '\n')
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{
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(*putc)('\r');
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}
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}
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if (pad_on_right)
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{
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while (pad-- > 0)
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{
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(*putc)(c);
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}
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}
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} else
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{
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(*putc)(c);
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if (c == '\n')
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{
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(*putc)('\r');
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}
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}
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}
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}
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int
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_cvt(unsigned long val, char *buf, long radix, char *digits)
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{
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char temp[80];
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char *cp = temp;
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int length = 0;
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if (val == 0)
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{ /* Special case */
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*cp++ = '0';
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} else
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while (val)
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{
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*cp++ = digits[val % radix];
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val /= radix;
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}
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while (cp != temp)
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{
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*buf++ = *--cp;
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length++;
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}
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*buf = '\0';
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return (length);
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}
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void
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_dump_buf_with_offset(unsigned char *p, int s, unsigned char *base)
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{
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int i, c;
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if ((unsigned int)s > (unsigned int)p)
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{
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s = (unsigned int)s - (unsigned int)p;
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}
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while (s > 0)
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{
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if (base)
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{
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_printk("%06X: ", (int)p - (int)base);
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} else
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{
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_printk("%06X: ", p);
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}
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for (i = 0; i < 16; i++)
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{
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if (i < s)
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{
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_printk("%02X", p[i] & 0xFF);
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} else
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{
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_printk(" ");
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}
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if ((i % 2) == 1) _printk(" ");
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if ((i % 8) == 7) _printk(" ");
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}
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_printk(" |");
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for (i = 0; i < 16; i++)
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{
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if (i < s)
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{
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c = p[i] & 0xFF;
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if ((c < 0x20) || (c >= 0x7F)) c = '.';
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} else
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{
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c = ' ';
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}
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_printk("%c", c);
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}
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_printk("|\n");
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s -= 16;
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p += 16;
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}
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}
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void
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_dump_buf(unsigned char *p, int s)
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{
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_printk("\n");
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_dump_buf_with_offset(p, s, 0);
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}
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/* Very simple inb/outb routines. We declare ISA_io to be 0 above, and
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* then modify it on platforms which need to. We do it like this
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* because on some platforms we give inb/outb an exact location, and
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* on others it's an offset from a given location. -- Tom
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*/
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void ISA_init(unsigned long base)
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{
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ISA_io = (unsigned char *)base;
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}
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void
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outb(int port, unsigned char val)
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{
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/* Ensure I/O operations complete */
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__asm__ volatile("eieio");
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ISA_io[port] = val;
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}
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unsigned char
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inb(int port)
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{
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/* Ensure I/O operations complete */
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__asm__ volatile("eieio");
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return (ISA_io[port]);
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}
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* tab-width: 8
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* End:
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*/
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