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powerpc/kconfig: define PAGE_SHIFT inside Kconfig

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This patch defined CONFIG_PPC_PAGE_SHIFT in order
to be able to use PAGE_SHIFT value inside Kconfig.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-02-21 19:08:46 +00:00 committed by Michael Ellerman
parent 28ea38b9cb
commit 555f4fdb93
2 changed files with 9 additions and 11 deletions
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7
arch/powerpc/Kconfig
View File

@ -704,6 +704,13 @@ config PPC_256K_PAGES
endchoice
config PPC_PAGE_SHIFT
int
default 18 if PPC_256K_PAGES
default 16 if PPC_64K_PAGES
default 14 if PPC_16K_PAGES
default 12
config THREAD_SHIFT
int "Thread shift" if EXPERT
range 13 15

13
arch/powerpc/include/asm/page.h
View File

@ -20,20 +20,11 @@
/*
* On regular PPC32 page size is 4K (but we support 4K/16K/64K/256K pages
* on PPC44x). For PPC64 we support either 4K or 64K software
* on PPC44x and 4K/16K on 8xx). For PPC64 we support either 4K or 64K software
* page size. When using 64K pages however, whether we are really supporting
* 64K pages in HW or not is irrelevant to those definitions.
*/
#if defined(CONFIG_PPC_256K_PAGES)
#define PAGE_SHIFT 18
#elif defined(CONFIG_PPC_64K_PAGES)
#define PAGE_SHIFT 16
#elif defined(CONFIG_PPC_16K_PAGES)
#define PAGE_SHIFT 14
#else
#define PAGE_SHIFT 12
#endif
#define PAGE_SHIFT CONFIG_PPC_PAGE_SHIFT
#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT)
#ifndef __ASSEMBLY__