arch/arm/mach-s3c44b0x/arch.c

   1 /*
   2  *  linux/arch/arm/mach-s3c44b0x/arch.c
   3  *      nickmit_zheng@eastday.com
   4  *              based on
   5  *      Hyok S. Choi (hyok.choi@samsung.com)
   6  *      linux 2.6 armnommu porting
   7  */
   8 #include <linux/types.h>
   9 #include <linux/sched.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/types.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/list.h>
  15 #include <linux/device.h>
  16 #include <linux/slab.h>
  17 #include <linux/string.h>
  18 #include <linux/sysdev.h>
  19
  20 #include <asm/hardware.h>
  21 #include <asm/io.h>
  22 #include <asm/irq.h>
  23 #include <asm/setup.h>
  24 #include <asm/mach-types.h>
  25
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/irq.h>
  28 #include <asm/mach/map.h>
  29
  30 #include <linux/tty.h>
  31 #include <asm/elf.h>
  32 #include <linux/root_dev.h>
  33 #include <linux/initrd.h>
  34
  35 // used by sysctl
  36 //#define DEFAULT_MAX_MAP_COUNT 65536
  37 //int sysctl_max_map_count = DEFAULT_MAX_MAP_COUNT;
  38
  39 int s3c44b0x_fMHZ       = CONFIG_ARM_CLK / 1000000;
  40 int s3c44b0x_finMHZ     = CONFIG_ARM_CLK_FIN / 1000000;
  41
  42 extern void __init s3c44b0x_init_irq(void);
  43 extern void s3c44b0x_time_init(void);
  44
  45 void __init s3c44b0x_init_machine(void)
  46 {
  47 }
  48
  49 #if CONFIG_DEBUG_NICKMIT
  50 // char my_cmdline[] = "root=/dev/ram rw initrd=0x0c700000,512K";
  51 char my_cmdline[1024] = "root=/dev/nfs "
  52         "nfsroot=192.168.1.24:/armboot "
  53         "ip=192.168.1.8:192.168.1.24:192.168.1.1:255.255.255.0:arm:eth0:off";
  54
  55 void __init change_cmdline(char **cmdline)
  56 {
  57         int magic_addr[] = {0xcf00000, 0xce000000, 0x1e0000};
  58         char magic_head[] = "Kernel cmdline:";
  59         int i;
  60         int cnt = sizeof (magic_addr) / sizeof (int);
  61         char *p, *d;
  62         for(i=0;i<cnt;i++) {
  63                 p = (char *) magic_addr[i];
  64                 if (strncmp(p, magic_head, (sizeof magic_head) - 1) != 0)
  65                         continue;
  66                 p += sizeof magic_head - 1;
  67                 d = my_cmdline;
  68                 while (*p != '\r' && *p != '\n' && (d - my_cmdline - sizeof my_cmdline))
  69                         *d++ = *p++;
  70
  71                 *d = 0;
  72                 *cmdline = my_cmdline;
  73                 return;
  74         }
  75         *cmdline = my_cmdline;
  76 }
  77
  78 void __init load_initrd(void *src, void *dst, size_t count)
  79 {
  80         int verify = 1;
  81         printk("Load initrd image from flash(%08x) to SDRAM(%08x), Length = %d ...", src, dst, count);
  82         memmove(dst, src, count);
  83         if (verify) {
  84                 printk("Verify ...");
  85                 printk("%s\n", memcmp(src, dst, count) == 0 ? "Done" : "Failed");
  86         } else {
  87                 printk("Done\n");
  88         }
  89 }
  90 #endif
  91
  92 void __init s3c44b0x_fixup(struct machine_desc *desc, struct param_struct *params, char **cmdline, struct meminfo *mi)
  93 {
  94 #if CONFIG_NICKMIT_DEBUG
  95         change_cmdline(cmdline);
  96 //      load_initrd(0x1000, 0x0c700000, 0x100000);
  97 #endif
  98 }
  99
 100 MACHINE_START(S3C44B0, "S3C44B0X Development Board")
 101         MAINTAINER("nickmit <nickmit_zheng@eastday.com>")
 102         FIXUP(s3c44b0x_fixup)
 103         INITIRQ(s3c44b0x_init_irq)
 104         INIT_MACHINE(s3c44b0x_init_machine)
 105         INITTIME(s3c44b0x_time_init)
 106 MACHINE_END