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/*
* 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
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <asm/ifxmips/ifxmips.h>
static char buf[1024]; /* for prom_printf() */
/* for voice cpu (MIPS24K) */
unsigned int *prom_cp1_base;
unsigned int prom_cp1_size;
/* for Multithreading (APRP) on MIPS34K */
unsigned long physical_memsize;
#ifdef IFXMIPS_PROM_ASC0
#define IFXMIPS_ASC_DIFF 0
#else
#define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF
#endif
static inline u32 asc_r32(unsigned long r)
{
return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
}
static inline void asc_w32(u32 v, unsigned long r)
{
ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
}
void prom_free_prom_memory(void)
{
}
void prom_putchar(char c)
{
unsigned long flags;
local_irq_save(flags);
while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF)
;
if (c == '\n')
asc_w32('\r', IFXMIPS_ASC_TBUF);
asc_w32(c, IFXMIPS_ASC_TBUF);
local_irq_restore(flags);
}
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);
}
unsigned int *prom_get_cp1_base(void)
{
return prom_cp1_base;
}
EXPORT_SYMBOL(prom_get_cp1_base);
unsigned int prom_get_cp1_size(void)
{
/* return size im MB */
return prom_cp1_size>>20;
}
EXPORT_SYMBOL(prom_get_cp1_size);
void __init prom_init(void)
{
int argc = fw_arg0;
char **argv = (char **) fw_arg1;
char **envp = (char **) fw_arg2;
int memsize = 16; /* assume 16M as default */
int i;
mips_machtype = MACH_INFINEON_IFXMIPS;
if (argc) {
argv = (char **)KSEG1ADDR((unsigned long)argv);
arcs_cmdline[0] = '\0';
for (i = 1; i < argc; i++) {
char *a = (char *)KSEG1ADDR(argv[i]);
if (!argv[i])
continue;
/* for voice cpu on Twinpass/Danube */
if (cpu_data[0].cputype == CPU_24K)
if (!strncmp(a, "cp1_size=", 9)) {
prom_cp1_size = memparse(a + 9, &a);
continue;
}
if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) {
prom_printf("cmdline overflow, skipping: %s\n", a);
break;
}
strcat(arcs_cmdline, a);
strcat(arcs_cmdline, " ");
}
if (!*arcs_cmdline)
strcpy(&(arcs_cmdline[0]),
"console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
}
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++;
}
memsize *= 1024 * 1024;
/* only on Twinpass/Danube a second CPU is used for Voice */
if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) {
memsize -= prom_cp1_size;
prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
prom_printf("Using %dMB Ram and reserving %dMB for cp1\n",
memsize>>20, prom_cp1_size>>20);
}
add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
}
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