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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>
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@ -10,6 +10,34 @@
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#ifndef __VBE_H
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#define __VBE_H
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/**
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* enum vbe_phase_t - current phase of VBE
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*
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* VBE operates in two distinct phases. In VPL it has to choose which firmware
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* to run (SPL, U-Boot, OP-TEE, etc.). It then carries on running until it gets
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* to U-Boot, where it decides which OS to run
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*
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* @VBE_PHASE_FIRMWARE: Selecting the firmware to run
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* @VBE_PHASE_OS: Selecting the Operating System to run
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*/
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enum vbe_phase_t {
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VBE_PHASE_FIRMWARE,
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VBE_PHASE_OS,
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};
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/**
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* vbe_phase() - get current VBE phase
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*
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* Returns: Current VBE phase
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*/
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static inline enum vbe_phase_t vbe_phase(void)
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{
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if (IS_ENABLED(CONFIG_SPL_BUILD))
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return VBE_PHASE_FIRMWARE;
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return VBE_PHASE_OS;
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}
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/**
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* vbe_list() - List the VBE bootmeths
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*
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