[PARISC] Further work for multiple page sizes
More work towards supporing multiple page sizes on 64-bit. Convert
some assumptions that 64bit uses 3 level page tables into testing
PT_NLEVELS. Also some BUG() to BUG_ON() conversions and some cleanups
to assembler.
Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 19f911c..910fb3a 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -138,6 +138,37 @@
enable this option otherwise. The 64bit kernel is significantly bigger
and slower than the 32bit one.
+choice
+ prompt "Kernel page size"
+ default PARISC_PAGE_SIZE_4KB if !64BIT
+ default PARISC_PAGE_SIZE_4KB if 64BIT
+# default PARISC_PAGE_SIZE_16KB if 64BIT
+
+config PARISC_PAGE_SIZE_4KB
+ bool "4KB"
+ help
+ This lets you select the page size of the kernel. For best
+ performance, a page size of 16KB is recommended. For best
+ compatibility with 32bit applications, a page size of 4KB should be
+ selected (the vast majority of 32bit binaries work perfectly fine
+ with a larger page size).
+
+ 4KB For best 32bit compatibility
+ 16KB For best performance
+ 64KB For best performance, might give more overhead.
+
+ If you don't know what to do, choose 4KB.
+
+config PARISC_PAGE_SIZE_16KB
+ bool "16KB (EXPERIMENTAL)"
+ depends on PA8X00 && EXPERIMENTAL
+
+config PARISC_PAGE_SIZE_64KB
+ bool "64KB (EXPERIMENTAL)"
+ depends on PA8X00 && EXPERIMENTAL
+
+endchoice
+
config SMP
bool "Symmetric multi-processing support"
---help---