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