aboutsummaryrefslogtreecommitdiff
path: root/arch/h8300/kernel/setup.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/h8300/kernel/setup.c
downloadlinux-stericsson-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/h8300/kernel/setup.c')
-rw-r--r--arch/h8300/kernel/setup.c248
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,
+};