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-rw-r--r--README26
1 files changed, 18 insertions, 8 deletions
diff --git a/README b/README
index 60c6b8a19db..f26c34a5e20 100644
--- a/README
+++ b/README
@@ -1545,16 +1545,26 @@ Low Level (hardware related) configuration options:
globally (CONFIG_CMD_MEMORY).
- CONFIG_SPL_BUILD
- Set when the currently-running compilation is for an artifact
- that will end up in the SPL (as opposed to the TPL or U-Boot
- proper). Code that needs stage-specific behavior should check
- this.
+ Set when the currently running compilation is for an artifact
+ that will end up in one of the 'xPL' builds, i.e. SPL, TPL or
+ VPL. Code that needs phase-specific behaviour can check this,
+ or (where possible) use spl_phase() instead.
+
+ Note that CONFIG_SPL_BUILD *is* always defined when either
+ of CONFIG_TPL_BUILD / CONFIG_VPL_BUILD is defined. This can be
+ counter-intuitive and should perhaps be changed.
- CONFIG_TPL_BUILD
- Set when the currently-running compilation is for an artifact
- that will end up in the TPL (as opposed to the SPL or U-Boot
- proper). Code that needs stage-specific behavior should check
- this.
+ Set when the currently running compilation is for an artifact
+ that will end up in the TPL build (as opposed to SPL, VPL or
+ U-Boot proper). Code that needs phase-specific behaviour can
+ check this, or (where possible) use spl_phase() instead.
+
+- CONFIG_VPL_BUILD
+ Set when the currently running compilation is for an artifact
+ that will end up in the VPL build (as opposed to the SPL, TPL
+ or U-Boot proper). Code that needs phase-specific behaviour can
+ check this, or (where possible) use spl_phase() instead.
- CONFIG_ARCH_MAP_SYSMEM
Generally U-Boot (and in particular the md command) uses