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127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*****************************************************************************
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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* Copyright (C) 2003 ADMtek Incorporated.
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* daniell@admtek.com.tw
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* Copyright (C) 2007 OpenWrt.org
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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*****************************************************************************/
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#include <linux/init.h>
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#include <linux/autoconf.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/bootmem.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/mach-adm5120/adm5120_info.h>
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static char **prom_envp = NULL;
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void setup_prom_printf(int);
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void prom_printf(char *, ...);
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void prom_meminit(void);
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#define READCSR(r) *(volatile unsigned long *)(0xB2600000+(r))
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#define WRITECSR(r,v) *(volatile unsigned long *)(0xB2600000+(r)) = v
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#define UART_DR_REG 0x00
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#define UART_FR_REG 0x18
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#define UART_TX_FIFO_FULL 0x20
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int putPromChar(char c)
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{
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WRITECSR(UART_DR_REG, c);
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while ( (READCSR(UART_FR_REG) & UART_TX_FIFO_FULL) );
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return 0;
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}
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/*
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* Ugly prom_printf used for debugging
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*/
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void prom_printf(char *fmt, ...)
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{
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va_list args;
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int l;
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char *p, *buf_end;
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char buf[1024];
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va_start(args, fmt);
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l = vsprintf(buf, fmt, args); /* hopefully i < sizeof(buf) */
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va_end(args);
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buf_end = buf + l;
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for (p = buf; p < buf_end; p++) {
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/* Crude cr/nl handling is better than none */
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if (*p == '\n')
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putPromChar('\r');
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putPromChar(*p);
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}
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}
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char *prom_getenv(char *envname)
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{
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char **env;
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char *ret;
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ret = NULL;
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if (prom_envp== NULL)
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return NULL;
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for (env = prom_envp; *env != NULL; env++) {
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if (strcmp(envname, *env++) == 0) {
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ret = *env;
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break;
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}
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}
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return ret;
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}
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extern char _image_cmdline;
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/*
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* initialize the prom module.
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*/
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void __init prom_init(void)
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{
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char *cmd;
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if ((fw_arg2 & 3) == 0) {
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prom_envp = (char **)fw_arg2;
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}
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adm5120_info_init();
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/* you should these macros defined in include/asm/bootinfo.h */
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mips_machgroup = MACH_GROUP_ADM5120;
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mips_machtype = adm5120_board.mach_type;
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/* init command line, register a default kernel command line */
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cmd = &_image_cmdline + 8;
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if( strlen(cmd) > 0) strcpy( &(arcs_cmdline[0]), cmd);
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else strcpy(&(arcs_cmdline[0]), CONFIG_CMDLINE);
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/* init memory map */
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prom_meminit();
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}
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