diff options
Diffstat (limited to 'arch/h8300/kernel/setup.c')
| -rw-r--r-- | arch/h8300/kernel/setup.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/arch/h8300/kernel/setup.c b/arch/h8300/kernel/setup.c new file mode 100644 index 000000000000..f469d9160730 --- /dev/null +++ b/arch/h8300/kernel/setup.c @@ -0,0 +1,248 @@ +/* + * linux/arch/h8300/kernel/setup.c + * + * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} + * Copyright (C) 1999,2000 Greg Ungerer (gerg@snapgear.com) + * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@lineo.ca> + * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> + * Copyright (C) 1995 Hamish Macdonald + * Copyright (C) 2000 Lineo Inc. (www.lineo.com) + * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> + * + * H8/300 porting Yoshinori Sato <ysato@users.sourceforge.jp> + */ + +/* + * This file handles the architecture-dependent parts of system setup + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/fs.h> +#include <linux/fb.h> +#include <linux/console.h> +#include <linux/genhd.h> +#include <linux/errno.h> +#include <linux/string.h> +#include <linux/major.h> +#include <linux/bootmem.h> +#include <linux/seq_file.h> +#include <linux/init.h> + +#include <asm/setup.h> +#include <asm/irq.h> + +#ifdef CONFIG_BLK_DEV_INITRD +#include <asm/pgtable.h> +#endif + +#if defined(__H8300H__) +#define CPU "H8/300H" +#include <asm/regs306x.h> +#endif + +#if defined(__H8300S__) +#define CPU "H8S" +#include <asm/regs267x.h> +#endif + +#define STUBSIZE 0xc000; + +unsigned long rom_length; +unsigned long memory_start; +unsigned long memory_end; + +char command_line[COMMAND_LINE_SIZE]; + +extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end; +extern int _ramstart, _ramend; +extern char _target_name[]; +extern void h8300_gpio_init(void); + +#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) \ + && defined(CONFIG_GDB_MAGICPRINT) +/* printk with gdb service */ +static void gdb_console_output(struct console *c, const char *msg, unsigned len) +{ + for (; len > 0; len--) { + asm("mov.w %0,r2\n\t" + "jsr @0xc4"::"r"(*msg++):"er2"); + } +} + +/* + * Setup initial baud/bits/parity. We do two things here: + * - construct a cflag setting for the first rs_open() + * - initialize the serial port + * Return non-zero if we didn't find a serial port. + */ +static int __init gdb_console_setup(struct console *co, char *options) +{ + return 0; +} + +static const struct console gdb_console = { + .name = "gdb_con", + .write = gdb_console_output, + .device = NULL, + .setup = gdb_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, +}; +#endif + +void __init setup_arch(char **cmdline_p) +{ + int bootmap_size; + + memory_start = (unsigned long) &_ramstart; + + /* allow for ROMFS on the end of the kernel */ + if (memcmp((void *)memory_start, "-rom1fs-", 8) == 0) { +#if defined(CONFIG_BLK_DEV_INITRD) + initrd_start = memory_start; + initrd_end = memory_start += be32_to_cpu(((unsigned long *) (memory_start))[2]); +#else + memory_start += be32_to_cpu(((unsigned long *) memory_start)[2]); +#endif + } + memory_start = PAGE_ALIGN(memory_start); +#if !defined(CONFIG_BLKDEV_RESERVE) + memory_end = (unsigned long) &_ramend; /* by now the stack is part of the init task */ +#if defined(CONFIG_GDB_DEBUG) + memory_end -= STUBSIZE; +#endif +#else + if ((memory_end < CONFIG_BLKDEV_RESERVE_ADDRESS) && + (memory_end > CONFIG_BLKDEV_RESERVE_ADDRESS) + /* overlap userarea */ + memory_end = CONFIG_BLKDEV_RESERVE_ADDRESS; +#endif + + init_mm.start_code = (unsigned long) &_stext; + init_mm.end_code = (unsigned long) &_etext; + init_mm.end_data = (unsigned long) &_edata; + init_mm.brk = (unsigned long) 0; + +#if (defined(CONFIG_H8300H_SIM) || defined(CONFIG_H8S_SIM)) && defined(CONFIG_GDB_MAGICPRINT) + register_console((struct console *)&gdb_console); +#endif + + printk(KERN_INFO "\r\n\nuClinux " CPU "\n"); + printk(KERN_INFO "Target Hardware: %s\n",_target_name); + printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); + printk(KERN_INFO "H8/300 series support by Yoshinori Sato <ysato@users.sourceforge.jp>\n"); + +#ifdef DEBUG + printk(KERN_DEBUG "KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " + "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, + (int) &_sdata, (int) &_edata, + (int) &_sbss, (int) &_ebss); + printk(KERN_DEBUG "KERNEL -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x " + "STACK=0x%06x-0x%06x\n", + (int) &_ebss, (int) memory_start, + (int) memory_start, (int) memory_end, + (int) memory_end, (int) &_ramend); +#endif + +#ifdef CONFIG_DEFAULT_CMDLINE + /* set from default command line */ + if (*command_line == '\0') + strcpy(command_line,CONFIG_KERNEL_COMMAND); +#endif + /* Keep a copy of command line */ + *cmdline_p = &command_line[0]; + memcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); + saved_command_line[COMMAND_LINE_SIZE-1] = 0; + +#ifdef DEBUG + if (strlen(*cmdline_p)) + printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p); +#endif + + /* + * give all the memory to the bootmap allocator, tell it to put the + * boot mem_map at the start of memory + */ + bootmap_size = init_bootmem_node( + NODE_DATA(0), + memory_start >> PAGE_SHIFT, /* map goes here */ + PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ + memory_end >> PAGE_SHIFT); + /* + * free the usable memory, we have to make sure we do not free + * the bootmem bitmap so we then reserve it after freeing it :-) + */ + free_bootmem(memory_start, memory_end - memory_start); + reserve_bootmem(memory_start, bootmap_size); + /* + * get kmalloc into gear + */ + paging_init(); + h8300_gpio_init(); +#if defined(CONFIG_H8300_AKI3068NET) && defined(CONFIG_IDE) + { +#define AREABIT(addr) (1 << (((addr) >> 21) & 7)) + /* setup BSC */ + volatile unsigned char *abwcr = (volatile unsigned char *)ABWCR; + volatile unsigned char *cscr = (volatile unsigned char *)CSCR; + *abwcr &= ~(AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)); + *cscr |= (AREABIT(CONFIG_H8300_IDE_BASE) | AREABIT(CONFIG_H8300_IDE_ALT)) | 0x0f; + } +#endif +#ifdef DEBUG + printk(KERN_DEBUG "Done setup_arch\n"); +#endif +} + +/* + * Get CPU information for use by the procfs. + */ + +static int show_cpuinfo(struct seq_file *m, void *v) +{ + char *cpu; + int mode; + u_long clockfreq; + + cpu = CPU; + mode = *(volatile unsigned char *)MDCR & 0x07; + + clockfreq = CONFIG_CPU_CLOCK; + + seq_printf(m, "CPU:\t\t%s (mode:%d)\n" + "Clock:\t\t%lu.%1luMHz\n" + "BogoMips:\t%lu.%02lu\n" + "Calibration:\t%lu loops\n", + cpu,mode, + clockfreq/1000,clockfreq%1000, + (loops_per_jiffy*HZ)/500000,((loops_per_jiffy*HZ)/5000)%100, + (loops_per_jiffy*HZ)); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t *pos) +{ + return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t *pos) +{ + ++*pos; + return c_start(m, pos); +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = show_cpuinfo, +}; |