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/*
* arch/mips/ifxmips/prom.c
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2005 Wu Qi Ming infineon
*
* Rewrite of Infineon IFXMips code, thanks to infineon for the support,
* software and hardware
*
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*
*/
#include <linux/init.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <asm/ifxmips/ifxmips.h>
static char buf[1024];
u32 *prom_cp1_base = NULL;
u32 prom_cp1_size = 0;
void
prom_free_prom_memory(void)
{
}
void
prom_putchar(char c)
{
while((ifxmips_r32(IFXMIPS_ASC1_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
if(c == '\n')
ifxmips_w32('\r', IFXMIPS_ASC1_TBUF);
ifxmips_w32(c, IFXMIPS_ASC1_TBUF);
}
void
prom_printf(const char * fmt, ...)
{
va_list args;
int l;
char *p, *buf_end;
va_start(args, fmt);
l = vsprintf(buf, fmt, args);
va_end(args);
buf_end = buf + l;
for(p = buf; p < buf_end; p++)
{
prom_putchar(*p);
}
}
u32 *prom_get_cp1_base(void)
{
return prom_cp1_base;
}
u32 prom_get_cp1_size(void)
{
return prom_cp1_size;
}
void __init
prom_init(void)
{
int argc = fw_arg0;
char **argv = (char **) fw_arg1;
char **envp = (char **) fw_arg2;
int memsize = 16;
int i;
mips_machtype = MACH_INFINEON_IFXMIPS;
argv = (char**)KSEG1ADDR((unsigned long)argv);
arcs_cmdline[0] = '\0';
for(i = 1; i < argc; i++)
{
char *a = (char*)KSEG1ADDR(argv[i]);
if(!a)
continue;
if(strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline))
break;
strcat(arcs_cmdline, a);
strcat(arcs_cmdline, " ");
}
envp = (char**)KSEG1ADDR((unsigned long)envp);
while(*envp)
{
char *e = (char*)KSEG1ADDR(*envp);
if(!strncmp(e, "memsize=", 8))
{
e += 8;
memsize = simple_strtoul(e, NULL, 10);
}
envp++;
}
prom_cp1_size = 2;
memsize -= prom_cp1_size;
prom_cp1_base = (u32*)(0xA0000000 + (memsize * 1024 * 1024));
prom_printf(KERN_INFO "Using %dMB Ram and reserving %dMB for cp1\n", memsize, prom_cp1_size);
memsize *= 1024 * 1024;
if(!*arcs_cmdline)
strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
}
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