/* $Id: args_prep.c,v 1.4 2017/12/10 02:26:41 christos Exp $ */
/*
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Petri Laakso.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* (c) for ngets() below:
*
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)gets.c 8.1 (Berkeley) 6/11/93
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/cdefs.h>
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include <arm/arm32/pte.h>
#define _LOCORE
#include <arm/imx/imx23var.h>
#undef _LOCORE
#include <machine/bootconfig.h>
#include <arm/imx/imx23_digctlreg.h>
#include <arm/imx/imx23_uartdbgreg.h>
#include "common.h"
static void ngets(char *, int);
#define L1_PAGE_TABLE (DRAM_BASE + MEMSIZE * 1024 * 1024 - L1_TABLE_SIZE)
#define BOOTIMX23_ARGS (L1_PAGE_TABLE - MAX_BOOT_STRING - 1)
#define PROMPT_DELAY 5000000 /* Wait 5 seconds user to press any key. */
int
args_prep(void)
{
u_int prompt;
char *boot_args = (char *)BOOTIMX23_ARGS;
/* Copy default boot arguments. */
memset((void *)boot_args, 0x00, MAX_BOOT_STRING);
strcpy(boot_args, KERNEL_BOOT_ARGS);
prompt = 0;
/* Enable debug UART data reception which was not enabled by the ROM. */
uint16_t cr = REG_RD_HW(HW_UARTDBG_BASE + HW_UARTDBGCR);
cr |= HW_UARTDBGCR_RXE;
REG_WR_HW(HW_UARTDBG_BASE + HW_UARTDBGCR, cr);
printf("Press any key to drop into boot prompt...\n\r");
REG_WR(HW_DIGCTL_BASE + HW_DIGCTL_MICROSECONDS_CLR, 0xFFFFFFFF);
while (REG_RD(HW_DIGCTL_BASE + HW_DIGCTL_MICROSECONDS) < PROMPT_DELAY) {
if (!(REG_RD_HW(HW_UARTDBG_BASE + HW_UARTDBGFR) &
HW_UARTDBGFR_RXFE)) {
/* RX FIFO is not empty, some key was pressed. */
REG_RD(HW_UARTDBG_BASE + HW_UARTDBGDR); /* Flush. */
prompt = 1;
break;
}
}
if (prompt) {
memset((void *)boot_args, 0x00, MAX_BOOT_STRING);
printf("boot: ");
ngets(boot_args, MAX_BOOT_STRING);
}
return 0;
}
/*
* gets() with constrained input length.
*
* Copied from: sys/arch/ia64/stand/common/gets.c
*/
static void
ngets(char *buf, int n)
{
int c;
char *lp;
for (lp = buf;;) {
switch (c = getchar() & 0177) {
case '\n':
case '\r':
*lp = '\0';
putchar('\n');
return;
case '\b':
case '\177':
if (lp > buf) {
lp--;
putchar('\b');
putchar(' ');
putchar('\b');
}
break;
case 'r'&037: {
char *p;
putchar('\n');
for (p = buf; p < lp; ++p)
putchar(*p);
break;
}
case 'u'&037:
case 'w'&037:
lp = buf;
putchar('\n');
break;
default:
if ((n < 1) || ((lp - buf) < n)) {
*lp++ = c;
putchar(c);
}
}
}
/*NOTREACHED*/
}
