projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 4c7418f3 SG |
1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | /* | |
| 3 | * Verified Boot for Embedded (VBE) support | |
| 4 | * See doc/develop/vbe.rst | |
| 5 | * | |
| 6 | * Copyright 2022 Google LLC | |
| 7 | * Written by Simon Glass <[email protected]> | |
| 8 | */ | |
| 9 | ||
| 10 | #ifndef __VBE_H | |
| 11 | #define __VBE_H | |
| 12 | ||
| 70b26e43 SG |
13 | /** |
| 14 | * enum vbe_phase_t - current phase of VBE | |
| 15 | * | |
| 16 | * VBE operates in two distinct phases. In VPL it has to choose which firmware | |
| 17 | * to run (SPL, U-Boot, OP-TEE, etc.). It then carries on running until it gets | |
| 18 | * to U-Boot, where it decides which OS to run | |
| 19 | * | |
| 20 | * @VBE_PHASE_FIRMWARE: Selecting the firmware to run | |
| 21 | * @VBE_PHASE_OS: Selecting the Operating System to run | |
| 22 | */ | |
| 23 | enum vbe_phase_t { | |
| 24 | VBE_PHASE_FIRMWARE, | |
| 25 | VBE_PHASE_OS, | |
| 26 | }; | |
| 27 | ||
| d8b7c34f SG |
28 | /** |
| 29 | * struct vbe_handoff - information about VBE progress | |
| 30 | * | |
| 31 | * @phases: Indicates which phases used the VBE bootmeth (1 << PHASE_...) | |
| 32 | */ | |
| 33 | struct vbe_handoff { | |
| 34 | u8 phases; | |
| 35 | }; | |
| 36 | ||
| 70b26e43 SG |
37 | /** |
| 38 | * vbe_phase() - get current VBE phase | |
| 39 | * | |
| 40 | * Returns: Current VBE phase | |
| 41 | */ | |
| 42 | static inline enum vbe_phase_t vbe_phase(void) | |
| 43 | { | |
| f38956a6 | 44 | if (IS_ENABLED(CONFIG_XPL_BUILD)) |
| 70b26e43 SG |
45 | return VBE_PHASE_FIRMWARE; |
| 46 | ||
| 47 | return VBE_PHASE_OS; | |
| 48 | } | |
| 49 | ||
| 4c7418f3 SG |
50 | /** |
| 51 | * vbe_list() - List the VBE bootmeths | |
| 52 | * | |
| 53 | * This shows a list of the VBE bootmeth devices | |
| 54 | * | |
| 55 | * @return 0 (always) | |
| 56 | */ | |
| 57 | int vbe_list(void); | |
| 58 | ||
| 59 | /** | |
| 60 | * vbe_find_by_any() - Find a VBE bootmeth by name or sequence | |
| 61 | * | |
| 62 | * @name: name (e.g. "vbe-simple"), or sequence ("2") to find | |
| 63 | * @devp: returns the device found, on success | |
| 64 | * Return: 0 if OK, -ve on error | |
| 65 | */ | |
| 66 | int vbe_find_by_any(const char *name, struct udevice **devp); | |
| 67 | ||
| 68 | /** | |
| 69 | * vbe_find_first_device() - Find the first VBE bootmeth | |
| 70 | * | |
| 71 | * @devp: Returns first available VBE bootmeth, or NULL if none | |
| 72 | * Returns: 0 (always) | |
| 73 | */ | |
| 74 | int vbe_find_first_device(struct udevice **devp); | |
| 75 | ||
| 76 | /** | |
| 77 | * vbe_find_next_device() - Find the next available VBE bootmeth | |
| 78 | * | |
| 79 | * @devp: Previous device to start from. Returns next available VBE bootmeth, | |
| 80 | * or NULL if none | |
| 81 | * Returns: 0 (always) | |
| 82 | */ | |
| 83 | int vbe_find_next_device(struct udevice **devp); | |
| 84 | ||
| 85 | #endif |