1 files changed, 90 insertions, 0 deletions
diff --git a/include/linux/coreboot.h b/include/linux/coreboot.h
new file mode 100644
index 000000000000..5d40ca7a1d89
--- /dev/null
+++ b/include/linux/coreboot.h
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * coreboot.h
+ *
+ * Coreboot device and driver interfaces.
+ *
+ * Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
+ * Copyright 2017 Google Inc.
+ * Copyright 2017 Samuel Holland <samuel@sholland.org>
+ */
+
+#ifndef _LINUX_COREBOOT_H
+#define _LINUX_COREBOOT_H
+
+#include <linux/compiler_attributes.h>
+#include <linux/stddef.h>
+#include <linux/types.h>
+
+typedef __aligned(4) u64 cb_u64;
+
+/* List of coreboot entry structures that is used */
+
+#define CB_TAG_FRAMEBUFFER 0x12
+#define LB_TAG_CBMEM_ENTRY 0x31
+
+/* Generic */
+struct coreboot_table_entry {
+	u32 tag;
+	u32 size;
+};
+
+/* Points to a CBMEM entry */
+struct lb_cbmem_ref {
+	u32 tag;
+	u32 size;
+
+	cb_u64 cbmem_addr;
+};
+
+/* Corresponds to LB_TAG_CBMEM_ENTRY */
+struct lb_cbmem_entry {
+	u32 tag;
+	u32 size;
+
+	cb_u64 address;
+	u32 entry_size;
+	u32 id;
+};
+
+#define LB_FRAMEBUFFER_ORIENTATION_NORMAL	0
+#define LB_FRAMEBUFFER_ORIENTATION_BOTTOM_UP	1
+#define LB_FRAMEBUFFER_ORIENTATION_LEFT_UP	2
+#define LB_FRAMEBUFFER_ORIENTATION_RIGHT_UP	3
+
+/* Describes framebuffer setup by coreboot */
+struct lb_framebuffer {
+	u32 tag;
+	u32 size;
+
+	cb_u64 physical_address;
+	u32 x_resolution;
+	u32 y_resolution;
+	u32 bytes_per_line;
+	u8  bits_per_pixel;
+	u8  red_mask_pos;
+	u8  red_mask_size;
+	u8  green_mask_pos;
+	u8  green_mask_size;
+	u8  blue_mask_pos;
+	u8  blue_mask_size;
+	u8  reserved_mask_pos;
+	u8  reserved_mask_size;
+	u8  orientation;
+};
+
+/*
+ * True if the coreboot-provided data is large enough to hold information
+ * on the linear framebuffer. False otherwise.
+ */
+#define LB_FRAMEBUFFER_HAS_LFB(__fb) \
+	((__fb)->size >= offsetofend(struct lb_framebuffer, reserved_mask_size))
+
+/*
+ * True if the coreboot-provided data is large enough to hold information
+ * on the display orientation. False otherwise.
+ */
+#define LB_FRAMEBUFFER_HAS_ORIENTATION(__fb) \
+	((__fb)->size >= offsetofend(struct lb_framebuffer, orientation))
+
+#endif /* _LINUX_COREBOOT_H */