1/* 2 * linux/arch/h8300/kernel/setup.c 3 * 4 * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} 5 * Copyright (C) 1999,2000 Greg Ungerer (gerg@snapgear.com) 6 * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@lineo.ca> 7 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> 8 * Copyright (C) 1995 Hamish Macdonald 9 * Copyright (C) 2000 Lineo Inc. (www.lineo.com) 10 * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> 11 * 12 * H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp> 13 */ 14 15/* 16 * This file handles the architecture-dependent parts of system setup 17 */ 18 19#include <linux/kernel.h> 20#include <linux/sched.h> 21#include <linux/delay.h> 22#include <linux/interrupt.h> 23#include <linux/mm.h> 24#include <linux/fs.h> 25#include <linux/fb.h> 26#include <linux/console.h> 27#include <linux/genhd.h> 28#include <linux/errno.h> 29#include <linux/string.h> 30#include <linux/major.h> 31#include <linux/bootmem.h> 32#include <linux/seq_file.h> 33#include <linux/init.h> 34 35#include <asm/setup.h> 36#include <asm/irq.h> 37#include <asm/pgtable.h> 38 39#if defined(__H8300H__) 40#define CPU "H8/300H" 41#include <asm/regs306x.h> 42#endif 43 44#if defined(__H8300S__) 45#define CPU "H8S" 46#include <asm/regs267x.h> 47#endif 48 49#define STUBSIZE 0xc000; 50 51unsigned long rom_length; 52unsigned long memory_start; 53unsigned long memory_end; 54 55char __initdata command_line[COMMAND_LINE_SIZE]; 56 57extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end; 58extern int _ramstart, _ramend; 59extern char _target_name[]; 60extern void h8300_gpio_init(void); 61 62#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && \ 63 defined(CONFIG_GDB_MAGICPRINT) 64/* printk with gdb service */ 65static void gdb_console_output(struct console *c, const char *msg, unsigned len) 66{ 67 for (; len > 0; len--) { 68 asm("mov.w %0,r2\n\t" 69 "jsr @0xc4"::"r"(*msg++):"er2"); 70 } 71} 72 73/* 74 * Setup initial baud/bits/parity. We do two things here: 75 * - construct a cflag setting for the first rs_open() 76 * - initialize the serial port 77 * Return non-zero if we didn't find a serial port. 78 */ 79static int __init gdb_console_setup(struct console *co, char *options) 80{ 81 return 0; 82} 83 84static const struct console gdb_console = { 85 .name = "gdb_con", 86 .write = gdb_console_output, 87 .device = NULL, 88 .setup = gdb_console_setup, 89 .flags = CON_PRINTBUFFER, 90 .index = -1, 91}; 92#endif 93 94void __init setup_arch(char **cmdline_p) 95{ 96 int bootmap_size; 97 98 memory_start = (unsigned long) &_ramstart; 99 100 /* allow for ROMFS on the end of the kernel */ 101 if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) { 102#if defined(CONFIG_BLK_DEV_INITRD) 103 initrd_start = memory_start; 104 initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]); 105#else 106 memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]); 107#endif 108 } 109 memory_start = PAGE_ALIGN(memory_start); 110#if !defined(CONFIG_BLKDEV_RESERVE) 111 memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */ 112#if defined(CONFIG_GDB_DEBUG) 113 memory_end -= STUBSIZE; 114#endif 115#else 116 if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) && 117 (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS)) 118 /* overlap userarea */ 119 memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS; 120#endif 121 122 init_mm.start_code = (unsigned long) &_stext; 123 init_mm.end_code = (unsigned long) &_etext; 124 init_mm.end_data = (unsigned long) &_edata; 125 init_mm.brk = (unsigned long) 0; 126 127#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && \ 128 defined(CONFIG_GDB_MAGICPRINT) 129 register_console((struct console *)&gdb_console); 130#endif 131 132 printk(KERN_INFO "\r\n\nuClinux " CPU "\n"); 133 printk(KERN_INFO "Target Hardware: %s\n",_target_name); 134 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 135 printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n"); 136 137#ifdef DEBUG 138 printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " 139 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, 140 (int) &_sdata, (int) &_edata, 141 (int) &_sbss, (int) &_ebss); 142 printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x " 143 "STACK=0x%06x-0x%06x\n", 144 (int) &_ebss, (int) memory_start, 145 (int) memory_start, (int) memory_end, 146 (int) memory_end, (int) &_ramend); 147#endif 148 149#ifdef CONFIG_DEFAULT_CMDLINE 150 /* set from default command line */ 151 if (*command_line == '\0') 152 strcpy(command_line,CONFIG_KERNEL_COMMAND); 153#endif 154 /* Keep a copy of command line */ 155 *cmdline_p = &command_line[0]; 156 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 157 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 158 159#ifdef DEBUG 160 if (strlen(*cmdline_p)) 161 printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p); 162#endif 163 164 /* 165 * give all the memory to the bootmap allocator, tell it to put the 166 * boot mem_map at the start of memory 167 */ 168 bootmap_size = init_bootmem_node( 169 NODE_DATA(0), 170 memory_start >> PAGE_SHIFT, /* map goes here */ 171 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ 172 memory_end >> PAGE_SHIFT); 173 /* 174 * free the usable memory, we have to make sure we do not free 175 * the bootmem bitmap so we then reserve it after freeing it :-) 176 */ 177 free_bootmem(memory_start, memory_end - memory_start); 178 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); 179 /* 180 * get kmalloc into gear 181 */ 182 paging_init(); 183 h8300_gpio_init(); 184#if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE) 185 { 186#define AREABIT(addr) (1 << (((addr) >> 21) & 7)) 187 /* setup BSC */ 188 volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR; 189 volatile unsigned char *cscr = (volatile unsigned char *)CSCR; 190 *abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)); 191 *cscr |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f; 192 } 193#endif 194#ifdef DEBUG 195 printk(KERN_DEBUG "Done setup_arch\n"); 196#endif 197} 198 199/* 200 * Get CPU information for use by the procfs. 201 */ 202 203static int show_cpuinfo(struct seq_file *m, void *v) 204{ 205 char *cpu; 206 int mode; 207 u_long clockfreq; 208 209 cpu = CPU; 210 mode = *(volatile unsigned char *)MDCR & 0x07; 211 212 clockfreq = CONFIG_CPU_CLOCK; 213 214 seq_printf(m, "CPU:\t\t%s (mode:%d)\n" 215 "Clock:\t\t%lu.%1luMHz\n" 216 "BogoMips:\t%lu.%02lu\n" 217 "Calibration:\t%lu loops\n", 218 cpu,mode, 219 clockfreq/1000,clockfreq%1000, 220 (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100, 221 (loops_per_jiffy*HZ)); 222 223 return 0; 224} 225 226static void *c_start(struct seq_file *m, loff_t *pos) 227{ 228 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 229} 230 231static void *c_next(struct seq_file *m, void *v, loff_t *pos) 232{ 233 ++*pos; 234 return c_start(m, pos); 235} 236 237static void c_stop(struct seq_file *m, void *v) 238{ 239} 240 241const struct seq_operations cpuinfo_op = { 242 .start = c_start, 243 .next = c_next, 244 .stop = c_stop, 245 .show = show_cpuinfo, 246}; 247