| Simon Glass | 4c7418f | 2022-07-30 15:52:32 -0600 | [diff] [blame] | 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 <sjg@chromium.org> |
| 8 | */ |
| 9 | |
| 10 | #ifndef __VBE_H |
| 11 | #define __VBE_H |
| 12 | |
| 13 | /** |
| Simon Glass | 70b26e4 | 2022-10-20 18:23:09 -0600 | [diff] [blame] | 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 | |
| 28 | /** |
| Simon Glass | d8b7c34 | 2022-10-20 18:23:18 -0600 | [diff] [blame] | 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 | |
| 37 | /** |
| Simon Glass | 70b26e4 | 2022-10-20 18:23:09 -0600 | [diff] [blame] | 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 | { |
| 44 | if (IS_ENABLED(CONFIG_SPL_BUILD)) |
| 45 | return VBE_PHASE_FIRMWARE; |
| 46 | |
| 47 | return VBE_PHASE_OS; |
| 48 | } |
| 49 | |
| 50 | /** |
| Simon Glass | 4c7418f | 2022-07-30 15:52:32 -0600 | [diff] [blame] | 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 |