[PATCH v4 4/4] arm: Support a separate stack for VPL

[Simon Glass]

VPL has the same needs as TPL in situations where the stack is at the
top of SRAM. Add an option for this and implement it for arm

Signed-off-by: Simon Glass <sjg at chromium.org>
---

Changes in v4:
- Rebase to -next

Changes in v3:
- Use 'phase' instead of 'stage' in VPL_STACK
- Split off into its own 'vbh' series

Changes in v2:
- Reply on existing CONFIG_VAL() to select the VPL stack
- Correct reference to TPL when VPL was intended

 common/spl/Kconfig.vpl | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/common/spl/Kconfig.vpl b/common/spl/Kconfig.vpl
index cf6b36c8e38..434562443ac 100644
--- a/common/spl/Kconfig.vpl
+++ b/common/spl/Kconfig.vpl
@@ -266,6 +266,20 @@ config VPL_MAX_SIZE
 	  The maximum size (in bytes) of the TPL stage. This size is determined
 	  by the amount of internal SRAM memory.
 
+config VPL_HAVE_INIT_STACK
+	bool "VPL requires a initial, fixed, stack-pointer location"
+	help
+	  Enable if the VPL phase should not use inherit its initial
+	  stack-pointer from the settings for U-Boot proper, but should set
+	  its own value.
+
+config VPL_STACK
+	hex "Address of the initial stack-pointer for the VPL phase"
+	depends on VPL_HAVE_INIT_STACK
+	help
+	  The address of the initial stack-pointer for the VPL phase
+	  Usually this will be the (aligned) top-of-stack.
+
 config VPL_BINMAN_SYMBOLS
 	bool "Declare binman symbols in VPL"
 	depends on VPL_FRAMEWORK && BINMAN
-- 
2.43.0