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[102/108] x86: Add a layout for Chrome OS verified boot

Message ID 20200126220508.102.I7705f4557d04102288614f5c447395fdadebc36f@changeid
State New
Headers show
Series RFC: dm: Add programatic generation of ACPI tables | expand

Commit Message

Simon Glass Jan. 27, 2020, 5:06 a.m. UTC 
Add definitions for part of the vboot context used with verified boot.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 arch/x86/include/asm/acpi/vbnv_layout.h | 41 +++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 arch/x86/include/asm/acpi/vbnv_layout.h
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Patch

diff --git a/arch/x86/include/asm/acpi/vbnv_layout.h b/arch/x86/include/asm/acpi/vbnv_layout.h
new file mode 100644
index 0000000000..377ff1d5cc
--- /dev/null
+++ b/arch/x86/include/asm/acpi/vbnv_layout.h
@@ -0,0 +1,41 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#ifndef __VBOOT_VBNV_LAYOUT_H__
+#define __VBOOT_VBNV_LAYOUT_H__
+
+#define VBOOT_VBNV_BLOCK_SIZE 16	/* Size of NV storage block in bytes */
+
+/* Constants for NV storage.  We use this rather than structs and
+ * bitfields so the data format is consistent across platforms and
+ * compilers.
+ */
+#define HEADER_OFFSET                0
+#define HEADER_MASK                     0xC0
+#define HEADER_SIGNATURE                0x40
+#define HEADER_FIRMWARE_SETTINGS_RESET  0x20
+#define HEADER_KERNEL_SETTINGS_RESET    0x10
+
+#define BOOT_OFFSET                  1
+#define BOOT_DEBUG_RESET_MODE           0x80
+#define BOOT_DISABLE_DEV_REQUEST        0x40
+#define BOOT_DISPLAY_REQUEST            0x20
+#define BOOT_TRY_B_COUNT_MASK           0x0F
+
+#define RECOVERY_OFFSET              2
+#define LOCALIZATION_OFFSET          3
+
+#define DEV_FLAGS_OFFSET             4
+#define DEV_BOOT_USB_MASK               0x01
+#define DEV_BOOT_SIGNED_ONLY_MASK       0x02
+#define DEV_ENABLE_UDC                  0x40
+
+#define MISC_FLAGS_OFFSET            8
+#define MISC_FLAGS_BATTERY_CUTOFF_MASK  0x08
+
+#define KERNEL_FIELD_OFFSET         11
+#define CRC_OFFSET                  15
+
+#endif /* __VBOOT_VBNV_LAYOUT_H__ */