x86: Support booting with TPL

Some boards want to use TPL as the first phase of U-Boot. This allows
selection of A or B SPL phases, thus allowing the memory init to be
upgraded in the field.

Add a new Kconfig option for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 185f0ef..45a5336 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -176,10 +176,17 @@ config X86_16BIT_INIT
 config SPL_X86_16BIT_INIT
        bool
        depends on X86_RESET_VECTOR
-       default y if X86_RESET_VECTOR && SPL
+       default y if X86_RESET_VECTOR && SPL && !TPL
        help
          This is enabled when 16-bit init is in SPL
 
+config TPL_X86_16BIT_INIT
+       bool
+       depends on X86_RESET_VECTOR
+       default y if X86_RESET_VECTOR && TPL
+       help
+         This is enabled when 16-bit init is in TPL
+
 config X86_32BIT_INIT
        bool
        depends on X86_RESET_VECTOR