114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
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/*****************************************************************************
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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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*
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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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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 ADM5120_ENVC 1
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char *adm5120_envp[2*ADM5120_ENVC] = {"memsize","0x001000000"};
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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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int i, index=0;
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i = strlen(envname);
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printk(KERN_INFO "GETENV: envname is %s\n", envname);
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while(index < (2*ADM5120_ENVC)) {
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if(strncmp(envname, adm5120_envp[index], i) == 0) {
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printk(KERN_INFO "GETENV: returning %s\n", adm5120_envp[index+1]);
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return(adm5120_envp[index+1]);
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}
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index += 2;
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}
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printk(KERN_INFO "GETENV: not found.\n");
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return(NULL);
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}
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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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/* you should these macros defined in include/asm/bootinfo.h */
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mips_machgroup = MACH_GROUP_ADM_GW;
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mips_machtype = MACH_ADM_GW_5120;
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/* init command line, register a default kernel command line */
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strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=jffs2 init=/etc/preinit");
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/* init memory map */
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prom_meminit();
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}
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