Rename kernel/ to src/

1 files changed, 56 insertions, 0 deletions

diff --git a/src/kernel/dump_multiboot.cc b/src/kernel/dump_multiboot.cc
new file mode 100644
index 0000000..60b4b91
--- /dev/null
+++ b/src/kernel/dump_multiboot.cc
@@ -0,0 +1,56 @@
+#include <multiboot2.h>
+#include <stdlib.h>
+
+extern "C" void dump_multiboot(uint32_t mb_magic, uint32_t mb_addr) {
+  printk("multiboot magic: ", uhex{mb_magic}, mb_magic == MULTIBOOT2_BOOTLOADER_MAGIC ? " valid" : " invalid", '\n');
+  printk("multiboot  addr: ", uhex{mb_addr}, !(mb_addr & 7) ? " is aligned" : " is not aligned", '\n');
+
+  struct multiboot_tag* tag;
+  const uint32_t size = *(unsigned*)mb_addr;
+  printk("Announced mbi size ", size, '\n');
+
+  for (tag = (struct multiboot_tag*)(mb_addr + 8); tag->type != MULTIBOOT_TAG_TYPE_END;
+       tag = (struct multiboot_tag*)((multiboot_uint8_t*)tag + ((tag->size + 7) & ~7))) {
+    switch (tag->type) {
+      case MULTIBOOT_TAG_TYPE_CMDLINE: {
+        auto* t = reinterpret_cast<multiboot_tag_string*>(tag);
+        printk("Command line = [", t->string, "]\n");
+      } break;
+
+      case MULTIBOOT_TAG_TYPE_BOOT_LOADER_NAME: {
+        auto* t = reinterpret_cast<multiboot_tag_string*>(tag);
+        printk("Boot loader name = [", t->string, "]\n");
+      } break;
+
+      case MULTIBOOT_TAG_TYPE_BOOTDEV: {
+        auto* t = reinterpret_cast<multiboot_tag_bootdev*>(tag);
+        printk("Boot device ", uhex{t->biosdev}, " slice ", t->slice, " part ", t->part, '\n');
+      } break;
+
+      case MULTIBOOT_TAG_TYPE_BASIC_MEMINFO: {
+        auto* t = reinterpret_cast<multiboot_tag_basic_meminfo*>(tag);
+        printk("mem_lower = ", t->mem_lower, "KB\n", "mem_upper = ", t->mem_upper, "KB\n");
+      } break;
+
+      case MULTIBOOT_TAG_TYPE_MMAP: {
+        auto* t = reinterpret_cast<multiboot_tag_mmap*>(tag);
+        multiboot_memory_map_t* mmap;
+
+        printk("memory map\n");
+        for (mmap = t->entries; (multiboot_uint8_t*)mmap < (multiboot_uint8_t*)tag + tag->size;
+             mmap = (multiboot_memory_map_t*)((unsigned long)mmap + ((struct multiboot_tag_mmap*)tag)->entry_size)) {
+          printk("  base_addr = ", uhex{(unsigned)(mmap->addr >> 32)}, ' ', uhex{(unsigned)(mmap->addr & 0xffffffff)});
+          printk(" length = ", (unsigned)(mmap->len >> 32), ' ', (unsigned)(mmap->len & 0xffffffff));
+          printk(" type = ", (unsigned)mmap->type, '\n');
+        }
+      } break;
+
+      default:
+        printk("Tag ", tag->type, ", Size ", tag->size, '\n');
+        break;
+    }  // switch(tag->type)
+  }    // for(each tag)
+
+  tag = (struct multiboot_tag*)((multiboot_uint8_t*)tag + ((tag->size + 7) & ~7));
+  printk("Total mbi size ", (unsigned)tag - mb_addr, '\n');
+}