kernel/dev.c

   1 /*
   2 ** Copyright 2001, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #include <kernel/kernel.h>
   6 #include <boot/stage2.h>
   7 #include <kernel/dev.h>
   8 #include <kernel/vfs.h>
   9 #include <kernel/debug.h>
  10 #include <kernel/elf.h>
  11
  12 #include <stdio.h>
  13
  14 int dev_init(kernel_args *ka)
  15 {
  16         dprintf("dev_init: entry\n");
  17
  18         return 0;
  19 }
  20
  21 int dev_scan_drivers(kernel_args *ka)
  22 {
  23         int fd;
  24         int err;
  25
  26         fd = sys_open("/boot/addons/dev", STREAM_TYPE_DIR, 0);
  27         if(fd >= 0) {
  28                 ssize_t len;
  29                 char buf[SYS_MAX_NAME_LEN];
  30
  31                 while((len = sys_read(fd, buf, 0, sizeof(buf))) > 0) {
  32                         dprintf("loading '%s' dev module\n", buf);
  33                         dev_load_dev_module(buf);
  34                 }
  35                 sys_close(fd);
  36         }
  37 }
  38
  39
  40 image_id dev_load_dev_module(const char *name)
  41 {
  42         image_id id;
  43         void (*bootstrap)();
  44         char path[SYS_MAX_PATH_LEN];
  45
  46         sprintf(path, "/boot/addons/dev/%s", name);
  47
  48         id = elf_load_kspace(path, "");
  49         if(id < 0)
  50                 return id;
  51
  52         bootstrap = (void *)elf_lookup_symbol(id, "dev_bootstrap");
  53         if(!bootstrap)
  54                 return ERR_VFS_INVALID_FS;
  55
  56         bootstrap();
  57
  58         return id;
  59 }
  60