Strange implementations

1 files changed, 61 insertions, 0 deletions

diff --git a/src/loader/inc/impl/mb2.h b/src/loader/inc/impl/mb2.h
new file mode 100644
index 0000000..3f64dbd
--- /dev/null
+++ b/src/loader/inc/impl/mb2.h
@@ -0,0 +1,61 @@
+// MIT License, Copyright (c) 2021 Marvin Borner
+
+#ifndef IMPL_MB2_H
+#define IMPL_MB2_H
+
+#include <cfg.h>
+#include <def.h>
+#include <dev.h>
+
+#define MB2_MAGIC 0xe85250d6 // Identifies kernel
+#define MB2_LOAD_MAGIC 0x36d76289 // Passed to kernel
+
+struct mb2_header {
+	u32 total_size;
+	u32 unknown;
+} PACKED;
+
+struct mb2_tag {
+	u32 type;
+	u32 size;
+} PACKED;
+
+struct mb2_memory {
+	u32 addr_low;
+	u32 addr_high;
+	u32 size_low;
+	u32 size_high;
+	u32 type;
+	u32 reserved;
+} PACKED;
+
+struct mb2_module {
+	u32 start;
+	u32 end;
+	char string[1];
+} PACKED;
+
+struct mb2_fb {
+	u32 addr_low;
+	u32 addr_high;
+	u32 pitch;
+	u32 width;
+	u32 height;
+	u8 bpp;
+	u8 type;
+} PACKED;
+
+enum mb2_tags {
+	MB2_TAG_END = 0,
+	MB2_TAG_CMDLINE = 1,
+	MB2_TAG_MODULE = 3,
+	MB2_TAG_MEMORY = 6,
+	MB2_TAG_FB = 8,
+	MB2_TAG_ACPI_1 = 14,
+	MB2_TAG_ACPI_2 = 15,
+};
+
+u8 mb2_detect(struct cfg_entry *cfg);
+void mb2_exec(struct cfg_entry *cfg);
+
+#endif