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/*
* Copyright (C) 2003 by SONE Takeshi <ts1@tsn.or.jp> and others.
* This program is licensed under the terms of GNU General Public License.
*
* Modified for LinuxBIOS by Greg Watson <gwatson@lanl.gov>
*/
#include <console/console.h>
#include <delay.h>
#include <string.h>
#include <boot/tables.h>
#include <boot/elf.h>
#define ENTER '\r'
#define ESCAPE '\x1b'
#ifndef AUTOBOOT_CMDLINE
#define autoboot(mem)
#endif
#ifndef AUTOBOOT_DELAY
#define autoboot_delay() 0 /* success */
#endif
#define havechar() console_tst_byte()
#define putchar(c) console_tx_byte(c)
#define getchar(c) console_rx_byte(c)
extern char *boot_file;
int getline(char *buf, int max)
{
int cur, ch, nonspace_seen;
cur = 0;
while (buf[cur]) {
putchar(buf[cur]);
cur++;
}
for (;;) {
ch = getchar();
switch (ch) {
/* end of line */
case '\r':
case '\n':
putchar('\n');
goto out;
/* backspace */
case '\b':
case '\x7f':
if (cur > 0) {
cur--;
putchar('\b');
putchar(' ');
putchar('\b');
}
break;
/* word erase */
case 'W' & 0x1f: /* ^W */
nonspace_seen = 0;
while (cur) {
if (buf[cur-1] != ' ')
nonspace_seen = 1;
putchar('\b');
putchar(' ');
putchar('\b');
cur--;
if (nonspace_seen && cur < max-1 && cur > 0 && buf[cur-1]==' ')
break;
}
break;
/* line erase */
case 'U' & 0x1f: /* ^U */
while (cur) {
putchar('\b');
putchar(' ');
putchar('\b');
cur--;
}
cur = 0;
break;
default:
if (ch < 0x20)
break; /* ignore control char */
if (ch >= 0x7f)
break;
if (cur + 1 < max) {
putchar(ch); /* echo back */
buf[cur] = ch;
cur++;
}
}
}
out:
if (cur >= max)
cur = max - 1;
buf[cur] = '\0';
return cur;
}
static void boot(struct lb_memory *mem, const char *line)
{
char *param;
/* Split filename and parameter */
boot_file = strdup(line);
param = strchr(boot_file, ' ');
if (param) {
*param = '\0';
param++;
}
if (!elfboot(mem))
printk_info("Unsupported image format\n");
free(boot_file);
}
#ifdef AUTOBOOT_CMDLINE
#if AUTOBOOT_DELAY
static inline int autoboot_delay(void)
{
unsigned int timeout;
int sec, tmp;
char key;
key = 0;
printk_info("Press <Enter> for default boot, or <Esc> for boot prompt... ");
for (sec = AUTOBOOT_DELAY; sec>0 && key==0; sec--) {
printk_info("%d", sec);
timeout = 10;
while (timeout-- > 0) {
if (havechar()) {
key = getchar();
if (key==ENTER || key==ESCAPE)
break;
}
mdelay(100);
}
for (tmp = sec; tmp; tmp /= 10)
printk_info("\b \b");
}
if (key == 0) {
printk_info("timed out\n");
return 0; /* success */
} else {
putchar('\n');
if (key == ESCAPE)
return -1; /* canceled */
else
return 0; /* default accepted */
}
}
#endif /* AUTOBOOT_DELAY */
static void autoboot(struct lb_memory *mem)
{
/* If Escape key is pressed already, skip autoboot */
if (havechar() && getchar()==ESCAPE)
return;
if (autoboot_delay()==0) {
printk_info("boot: %s\n", AUTOBOOT_CMDLINE);
boot(mem, AUTOBOOT_CMDLINE);
}
}
#endif /* AUTOBOOT_CMDLINE */
/* The main routine */
int filo(struct lb_memory *mem)
{
char line[256];
printk_info("FILO version 0.4.1\n");
/* Try default image */
autoboot(mem);
/* The above didn't work, ask user */
while (havechar())
getchar();
#ifdef AUTOBOOT_CMDLINE
strncpy(line, AUTOBOOT_CMDLINE, sizeof(line)-1);
line[sizeof(line)-1] = '\0';
#else
line[0] = '\0';
#endif
for (;;) {
printk_info("boot: ");
getline(line, sizeof line);
if (line[0])
boot(mem, line);
}
}
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