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/mc146818rtc.h> 16 #include <linux/param.h> 17 #include <linux/sched.h> 18 19 #include <asm/bootinfo.h> 20 #include <asm/mc146818-time.h> 21 #include <asm/mipsregs.h> 22 #include <asm/mmu_context.h> 23 #include <asm/sgialib.h> 24 #include <asm/time.h> 25 #include <asm/traps.h> 26 #include <asm/io.h> 27 #include <asm/ip32/crime.h> 28 #include <asm/ip32/mace.h> 29 #include <asm/ip32/ip32_ints.h> 30 31 extern void ip32_be_init(void); 32 extern void crime_init(void); 33 34 #ifdef CONFIG_SGI_O2MACE_ETH 35 /* 36 * This is taken care of in here 'cause they say using Arc later on is 37 * problematic 38 */ 39 extern char o2meth_eaddr[8]; 40 static inline unsigned char str2hexnum(unsigned char c) 41 { 42 if (c >= '0' && c <= '9') 43 return c - '0'; 44 if (c >= 'a' && c <= 'f') 45 return c - 'a' + 10; 46 return 0; /* foo */ 47 } 48 49 static inline void str2eaddr(unsigned char *ea, unsigned char *str) 50 { 51 int i; 52 53 for (i = 0; i < 6; i++) { 54 unsigned char num; 55 56 if(*str == ':') 57 str++; 58 num = str2hexnum(*str++) << 4; 59 num |= (str2hexnum(*str++)); 60 ea[i] = num; 61 } 62 } 63 #endif 64 65 /* An arbitrary time; this can be decreased if reliability looks good */ 66 #define WAIT_MS 10 67 68 void __init plat_time_init(void) 69 { 70 printk(KERN_INFO "Calibrating system timer... "); 71 write_c0_count(0); 72 crime->timer = 0; 73 while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ; 74 mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS; 75 printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000); 76 } 77 78 void __init plat_mem_setup(void) 79 { 80 board_be_init = ip32_be_init; 81 82 #ifdef CONFIG_SGI_O2MACE_ETH 83 { 84 char *mac = ArcGetEnvironmentVariable("eaddr"); 85 str2eaddr(o2meth_eaddr, mac); 86 } 87 #endif 88 89 #if defined(CONFIG_SERIAL_CORE_CONSOLE) 90 { 91 char* con = ArcGetEnvironmentVariable("console"); 92 if (con && *con == 'd') { 93 static char options[8] __initdata; 94 char *baud = ArcGetEnvironmentVariable("dbaud"); 95 if (baud) 96 strcpy(options, baud); 97 add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0, 98 baud ? options : NULL); 99 } 100 } 101 #endif 102 } 103