[BOOT] Parse multiboot information

2016-11-20 11:26:01 +01:00
parent d149d4d20a
commit 0120df249e
5 changed files with 179 additions and 11 deletions
--- a/kernel/boot/multiboot.c
+++ b/kernel/boot/multiboot.c
@@ -0,0 +1,94 @@
+#include <stdint.h>
+#include <multiboot.h>
+#include <mem.h>
+#include <debug.h>
+
+struct mboot_data_st mboot_data;
+
+
+void parse_multiboot1()
+{
+  mboot1_info *data = mboot_data.data;
+  if(data->flags & (1<<2))
+  {
+    debug_ok("MBOOT1 - commandline\n");
+    mboot_data.commandline = P2V(data->cmdline);
+  }
+  if(data->flags & (1<<9))
+  {
+    debug_ok("MBOOT1 - bootloader\n");
+    mboot_data.bootloader = P2V(data->bootloader_name);
+  }
+}
+
+char *mboot_tags_type[] = {
+  "", // 0
+  "Boot command line", // 1
+  "Boot loader name", // 2
+  "Module", // 3
+  "Basic memory information", // 4
+  "BIOS Boot device", // 5
+  "Memory map", // 6
+  "VBE info", // 7
+  "Framebuffer info", // 8
+  "ELF-Symbols", //9
+  "APM table", // 10
+  "EFI 32-bit system table pointer", // 11
+  "EFI 64-bit system table pointer", // 12
+  "SMBIOS tables", // 13
+  "ACPI old RSDP", // 14
+  "ACPI new RSDP", // 15
+  "Networking information", // 16
+  "EFI memory map", // 17
+  "EFI boot services not terminated",
+};
+void parse_multiboot2()
+{
+  mboot2_tags_head *data = mboot_data.data;
+  mboot2_tag_basic *tag = (void *)(data + 1);
+  while(tag->type != 0)
+  {
+    switch(tag->type)
+    {
+      case MBOOT2_CMDLINE:
+        mboot_data.commandline = tag->data;
+        debug_ok("MBOOT2 - handle ");
+        break;
+      case MBOOT2_BOOTLOADER:
+        mboot_data.bootloader = tag->data;
+        debug_ok("MBOOT2 - handle ");
+        break;
+      default:
+        debug_warning("MBOOT2 - ignore ");
+        break;
+    }
+    if(tag->type <= 18)
+      debug("%s (%d bytes)\n", mboot_tags_type[tag->type], tag->size);
+    else
+      debug("Unknown tag: %d (%d bytes)\n", tag->type, tag->size);
+    tag = next_tag(tag);
+  }
+}
+
+void multiboot_init(uint64_t magic, void *data)
+{
+  mboot_data.data = data;
+  debug_info("MBOOT - Magic:%x\n", magic);
+  if(magic == MBOOT1_MAGIC2)
+  {
+    debug_info("MBOOT - Multiboot version 1\n");
+    mboot_data.version = 1;
+    parse_multiboot1();
+  } else if (magic == MBOOT2_MAGIC2) {
+    debug_info("MBOOT - Multiboot version 2\n");
+    mboot_data.version = 2;
+    parse_multiboot2();
+  } else {
+    debug_error("PANIC - NOT A MULTIBOOT COMPLIANT BOOTLOADER\n");
+    for(;;);
+  }
+  if(mboot_data.commandline)
+    debug_info("MBOOT - Command line: %s\n", mboot_data.commandline);
+  if(mboot_data.bootloader)
+    debug_info("MBOOT - Bootloader: %s\n", mboot_data.bootloader);
+}