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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
*/
#include <linux/init.h>
#include <linux/io.h>
#include <asm/bootinfo.h>
#include <asm/cacheflush.h>
#include <asm/traps.h>
#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/prom.h>
extern void prom_init_early_console(char port);
extern char except_vec_nmi;
extern char except_vec_ejtag_debug;
int prom_argc;
int *_prom_argv, *_prom_envp;
#define prom_envp(index) ((char *)(long)_prom_envp[(index)])
char *prom_getenv(char *envname)
{
/*
* Return a pointer to the given environment variable.
* In 64-bit mode: we're using 64-bit pointers, but all pointers
* in the PROM structures are only 32-bit, so we need some
* workarounds, if we are running in 64-bit mode.
*/
int i, index = 0;
i = strlen(envname);
while (prom_envp(index)) {
if (strncmp(envname, prom_envp(index), i) == 0)
return prom_envp(index+1);
index += 2;
}
return NULL;
}
static void __init mips_nmi_setup(void)
{
void *base;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa80) :
(void *)(CAC_BASE + 0x380);
memcpy(base, &except_vec_nmi, 0x80);
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
static void __init mips_ejtag_setup(void)
{
void *base;
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa00) :
(void *)(CAC_BASE + 0x300);
memcpy(base, &except_vec_ejtag_debug, 0x80);
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
void __init prom_init(void)
{
prom_argc = fw_arg0;
_prom_argv = (int *) fw_arg1;
_prom_envp = (int *) fw_arg2;
board_nmi_handler_setup = mips_nmi_setup;
board_ejtag_handler_setup = mips_ejtag_setup;
prom_init_cmdline();
prom_meminit();
#ifdef CONFIG_EARLY_PRINTK
if ((strstr(prom_getcmdline(), "console=ttyS0")) != NULL)
prom_init_early_console(0);
else if ((strstr(prom_getcmdline(), "console=ttyS1")) != NULL)
prom_init_early_console(1);
#endif
#ifdef CONFIG_SERIAL_8250_CONSOLE
if ((strstr(prom_getcmdline(), "console=")) == NULL)
strcat(prom_getcmdline(), " console=ttyS0,38400n8r");
#endif
}
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