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| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2014-09-19 10:36:09 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-11-08 01:10:42 +0100 |
| commit | 959d6173b5cccceff47cc2d25feeaac2f96df0e0 (patch) | |
| tree | 7cbd7b7d440a3849967da97ccf0c738a3adf15b2 | |
| parent | powerpc/8xx: Const for TLB RPN forced value (diff) | |
| download | linux-959d6173b5cccceff47cc2d25feeaac2f96df0e0.tar.xz linux-959d6173b5cccceff47cc2d25feeaac2f96df0e0.zip | |
powerpc/8xx: Implement 16k pages
This patch activates the handling of 16k pages on the MPC8xx.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
| -rw-r--r-- | arch/powerpc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/mmu-8xx.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 4 |
3 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 88eace4e28c3..abb8709d8b2a 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -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 diff --git a/arch/powerpc/include/asm/mmu-8xx.h b/arch/powerpc/include/asm/mmu-8xx.h index 3d11d3ce79ec..986b9e1e1044 100644 --- a/arch/powerpc/include/asm/mmu-8xx.h +++ b/arch/powerpc/include/asm/mmu-8xx.h @@ -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. diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 38efa8622176..84b0b9778065 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -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); |