1/* 2 * IP32 basic setup 3 * 4 * This file is subject to the terms and conditions of the GNU General Public 5 * License. See the file "COPYING" in the main directory of this archive 6 * for more details. 7 * 8 * Copyright (C) 2000 Harald Koerfgen 9 * Copyright (C) 2002, 2003, 2005 Ilya A. Volynets 10 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org> 11 */ 12#include <linux/console.h> 13#include <linux/init.h> 14#include <linux/interrupt.h> 15#include <linux/param.h> 16#include <linux/sched.h> 17 18#include <asm/bootinfo.h> 19#include <asm/mipsregs.h> 20#include <asm/mmu_context.h> 21#include <asm/sgialib.h> 22#include <asm/time.h> 23#include <asm/traps.h> 24#include <asm/io.h> 25#include <asm/ip32/crime.h> 26#include <asm/ip32/mace.h> 27#include <asm/ip32/ip32_ints.h> 28 29#include "ip32-common.h" 30 31#ifdef CONFIG_SGI_O2MACE_ETH 32/* 33 * This is taken care of in here 'cause they say using Arc later on is 34 * problematic 35 */ 36extern char o2meth_eaddr[8]; 37static inline unsigned char str2hexnum(unsigned char c) 38{ 39 if (c >= '0' && c <= '9') 40 return c - '0'; 41 if (c >= 'a' && c <= 'f') 42 return c - 'a' + 10; 43 return 0; /* foo */ 44} 45 46static inline void str2eaddr(unsigned char *ea, unsigned char *str) 47{ 48 int i; 49 50 for (i = 0; i < 6; i++) { 51 unsigned char num; 52 53 if(*str == ':') 54 str++; 55 num = str2hexnum(*str++) << 4; 56 num |= (str2hexnum(*str++)); 57 ea[i] = num; 58 } 59} 60#endif 61 62/* An arbitrary time; this can be decreased if reliability looks good */ 63#define WAIT_MS 10 64 65void __init plat_time_init(void) 66{ 67 printk(KERN_INFO "Calibrating system timer... "); 68 write_c0_count(0); 69 crime->timer = 0; 70 while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ; 71 mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS; 72 printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000); 73} 74 75void __init plat_mem_setup(void) 76{ 77 board_be_init = ip32_be_init; 78 79#ifdef CONFIG_SGI_O2MACE_ETH 80 { 81 char *mac = ArcGetEnvironmentVariable("eaddr"); 82 str2eaddr(o2meth_eaddr, mac); 83 } 84#endif 85 86#if defined(CONFIG_SERIAL_CORE_CONSOLE) 87 { 88 char* con = ArcGetEnvironmentVariable("console"); 89 if (con && *con == 'd') { 90 static char options[8] __initdata; 91 char *baud = ArcGetEnvironmentVariable("dbaud"); 92 if (baud) 93 strcpy(options, baud); 94 add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0, 95 baud ? options : NULL); 96 } 97 } 98#endif 99} 100