CONFIG_PHYSICAL_ALIGN gives the physical address's alignment where the
kernel is loaded.
CONFIG_PHYSICAL_ALIGN's default value is different from i386 kernel with the
x86_84 kernel. The i386's default CONFIG_PHYSICAL_ALIGN value is 1MB, but
the x86_64's is 2MB.
The problem is, if you compile x86_64 kernel, the value of
CONFIG_PHYSICAL_ALIGN will be fixed, and the next time you compile i386
kernel, previous CONFIG_PHYSICAL_ALIGN value of x86_64(default: 2MB) will
be used by default.
The follwing patch will fix this problem. With this patch, either
CONFIG_RELOCATABLE's option or CONFIG_EMNBEDDED's option is set "Y",
you can configure the value of CONFIG_PHYSICAL_ALIGN.
Signed-off-by: Yoshimi Ichiyanagi <ichiyanagi.yoshimi@xxxxxxxxxxxxx>
---
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig
index f952493..05c3316 100644
--- a/arch/i386/Kconfig
+++ b/arch/i386/Kconfig
@@ -880,7 +880,7 @@ config RELOCATABLE
kernel.
config PHYSICAL_ALIGN
- hex "Alignment value to which kernel should be aligned"
+ hex "Alignment value to which kernel should be aligned" if (EMBEDDED || RELOCATABLE)
default "0x100000"
range 0x2000 0x400000
help
--
Yoshimi Ichiyanagi
Open source software computing project, NTT Cyber Space Laboratories
E-mail : ichiyanagi.yoshimi@xxxxxxxxxxxxx
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