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Commit 959d6173 authored by LEROY Christophe's avatar LEROY Christophe Committed by Scott Wood
Browse files

powerpc/8xx: Implement 16k pages 



This patch activates the handling of 16k pages on the MPC8xx.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent ac21951f

arch/powerpc/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -549,7 +549,7 @@ config PPC_4K_PAGES 
	bool "4k page size"



config PPC_16K_PAGES

	bool "16k page size" if 44x

	bool "16k page size" if 44x || PPC_8xx



config PPC_64K_PAGES

	bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64

arch/powerpc/include/asm/mmu-8xx.h

+2 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ 
 * additional information from the MI_EPN, and MI_TWC registers.

 */

#define SPRN_MI_RPN	790

#define MI_SPS16K	0x00000008	/* Small page size (0 = 4k, 1 = 16k) */



/* Define an RPN value for mapping kernel memory to large virtual

 * pages for boot initialization.  This has real page number of 0,
@@ -129,6 +130,7 @@ 
 * additional information from the MD_EPN, and MD_TWC registers.

 */

#define SPRN_MD_RPN	798

#define MD_SPS16K	0x00000008	/* Small page size (0 = 4k, 1 = 16k) */



/* This is a temporary storage register that could be used to save

 * a processor working register during a tablewalk.

arch/powerpc/kernel/head_8xx.S

+4 −0
Original line number Diff line number Diff line
@@ -45,7 +45,11 @@ 
 * Value for the bits that have fixed value in RPN entries.

 * Also used for tagging DAR for DTLBerror.

 */

#ifdef CONFIG_PPC_16K_PAGES

#define RPN_PATTERN	(0x00f0 | MD_SPS16K)

#else

#define RPN_PATTERN	0x00f0

#endif



	__HEAD

_ENTRY(_stext);