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| author | Simon Glass <sjg@chromium.org> | 2022-10-20 18:23:09 -0600 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-10-31 11:03:18 -0400 |
| commit | 70b26e4356f9153d2d8195748a0e146c35b0c42e (patch) | |
| tree | 989bba69aef5da389fde5195e44a438c7a8f78de | |
| parent | f1459c365795a72fff94e249b0eb5cb61ead340e (diff) | |
| download | u-boot-70b26e4356f9153d2d8195748a0e146c35b0c42e.tar.gz u-boot-70b26e4356f9153d2d8195748a0e146c35b0c42e.tar.bz2 u-boot-70b26e4356f9153d2d8195748a0e146c35b0c42e.zip | |
vbe: Support selecting operations by SPL phase
VBE supports booting firmware during the SPL phases, i.e. so that VPL can
start SPL and SPL can start U-Boot.
It also supports booting an OS, when in U-Boot.
As a first step towards these features, add functions to indicate the
current VBE phase. The firmware selection is done in VPL and the OS
selection is done in U-Boot proper.
Signed-off-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | include/vbe.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/include/vbe.h b/include/vbe.h index b83f6f0c51..ece2697b5d 100644 --- a/include/vbe.h +++ b/include/vbe.h @@ -11,6 +11,34 @@ #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, +}; + +/** + * 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 |