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Diffstat (limited to 'include/vbe.h')
-rw-r--r-- | include/vbe.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/include/vbe.h b/include/vbe.h new file mode 100644 index 00000000000..5ede8181b98 --- /dev/null +++ b/include/vbe.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Verified Boot for Embedded (VBE) support + * See doc/develop/vbe.rst + * + * Copyright 2022 Google LLC + * Written by Simon Glass <sjg@chromium.org> + */ + +#ifndef __VBE_H +#define __VBE_H + +/** + * enum vbe_phase_t - current phase of VBE + * + * VBE operates in two distinct phases. In VPL it has to choose which firmware + * to run (SPL, U-Boot, OP-TEE, etc.). It then carries on running until it gets + * to U-Boot, where it decides which OS to run + * + * @VBE_PHASE_FIRMWARE: Selecting the firmware to run + * @VBE_PHASE_OS: Selecting the Operating System to run + */ +enum vbe_phase_t { + VBE_PHASE_FIRMWARE, + VBE_PHASE_OS, +}; + +/** + * struct vbe_handoff - information about VBE progress + * + * @phases: Indicates which phases used the VBE bootmeth (1 << PHASE_...) + */ +struct vbe_handoff { + u8 phases; +}; + +/** + * vbe_phase() - get current VBE phase + * + * Returns: Current VBE phase + */ +static inline enum vbe_phase_t vbe_phase(void) +{ + if (IS_ENABLED(CONFIG_SPL_BUILD)) + return VBE_PHASE_FIRMWARE; + + return VBE_PHASE_OS; +} + +/** + * vbe_list() - List the VBE bootmeths + * + * This shows a list of the VBE bootmeth devices + * + * @return 0 (always) + */ +int vbe_list(void); + +/** + * vbe_find_by_any() - Find a VBE bootmeth by name or sequence + * + * @name: name (e.g. "vbe-simple"), or sequence ("2") to find + * @devp: returns the device found, on success + * Return: 0 if OK, -ve on error + */ +int vbe_find_by_any(const char *name, struct udevice **devp); + +/** + * vbe_find_first_device() - Find the first VBE bootmeth + * + * @devp: Returns first available VBE bootmeth, or NULL if none + * Returns: 0 (always) + */ +int vbe_find_first_device(struct udevice **devp); + +/** + * vbe_find_next_device() - Find the next available VBE bootmeth + * + * @devp: Previous device to start from. Returns next available VBE bootmeth, + * or NULL if none + * Returns: 0 (always) + */ +int vbe_find_next_device(struct udevice **devp); + +#endif |