VBE supports booting firmware during the SPL phases, i.e. so that VPL can start SPL, then 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 ---
include/vbe.h | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/include/vbe.h b/include/vbe.h index b83f6f0c519..ece2697b5dc 100644 --- a/include/vbe.h +++ b/include/vbe.h @@ -10,6 +10,34 @@ #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, +}; + +/** + * 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 *