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/*
*
* BRIEF MODULE DESCRIPTION
* PROM library initialisation code, supports YAMON and U-Boot.
*
* Copyright 2000, 2001, 2006 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
* This file was derived from Carsten Langgaard's
* arch/mips/mips-boards/xx files.
*
* Carsten Langgaard, carstenl@mips.com
* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/string.h>
#include <asm/bootinfo.h>
#include <asm/mach-jz4740/regs.h>
/* #define DEBUG_CMDLINE */
int prom_argc;
char **prom_argv, **prom_envp;
char *prom_getcmdline(void)
{
return &(arcs_cmdline[0]);
}
void prom_init_cmdline(void)
{
char *cp, *c;
size_t i = 1;
cp = &(arcs_cmdline[0]);
while(i < prom_argc) {
c = prom_argv[i];
while (*c) {
*cp++ = *c++;
}
*cp++ = ' ';
i++;
}
if (i > 1) {
*(cp - 1) = '\0';
}
}
void __init prom_init(void)
{
unsigned long memsize;
prom_argc = (int) fw_arg0;
prom_argv = (char **) fw_arg1;
prom_envp = (char **) fw_arg2;
mips_machtype = MACH_INGENIC_JZ4740;
prom_init_cmdline();
memsize = 0x04000000;
add_memory_region(0, memsize, BOOT_MEM_RAM);
}
void __init prom_free_prom_memory(void)
{
}
/* used by early printk */
void prom_putchar(char c)
{
volatile u8 *uart_lsr = (volatile u8 *)(UART0_BASE + OFF_LSR);
volatile u8 *uart_tdr = (volatile u8 *)(UART0_BASE + OFF_TDR);
/* Wait for fifo to shift out some bytes */
while ( !((*uart_lsr & (UARTLSR_TDRQ | UARTLSR_TEMT)) == 0x60) );
*uart_tdr = (u8)c;
}
const char *get_system_type(void)
{
return "JZ4740";
}
EXPORT_SYMBOL(prom_getcmdline);
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