mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
ca9153a3a2
This adds support for 16k and 64k page sizes on PowerPC 44x processors. The PGDIR table is much smaller than a page when using 16k or 64k pages (512 and 32 bytes respectively) so we allocate the PGDIR with kzalloc() instead of __get_free_pages(). One PTE table covers rather a large memory area when using 16k or 64k pages (32MB or 512MB respectively), so we can easily put FIXMAP and PKMAP in the area covered by one PTE table. Signed-off-by: Yuri Tikhonov <yur@emcraft.com> Signed-off-by: Vladimir Panfilov <pvr@emcraft.com> Signed-off-by: Ilya Yanok <yanok@emcraft.com> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
#ifndef _ASM_POWERPC_PAGE_32_H
|
|
#define _ASM_POWERPC_PAGE_32_H
|
|
|
|
#if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
|
|
#if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
|
|
#error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
|
|
#endif
|
|
#endif
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
|
|
|
|
#ifdef CONFIG_NOT_COHERENT_CACHE
|
|
#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
|
|
#endif
|
|
|
|
#ifdef CONFIG_PTE_64BIT
|
|
#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
|
|
#else
|
|
#define PTE_FLAGS_OFFSET 0
|
|
#endif
|
|
|
|
#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2) /* full page */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/*
|
|
* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
|
|
* physical addressing.
|
|
*/
|
|
#ifdef CONFIG_PTE_64BIT
|
|
typedef unsigned long long pte_basic_t;
|
|
#else
|
|
typedef unsigned long pte_basic_t;
|
|
#endif
|
|
|
|
struct page;
|
|
extern void clear_pages(void *page, int order);
|
|
static inline void clear_page(void *page) { clear_pages(page, 0); }
|
|
extern void copy_page(void *to, void *from);
|
|
|
|
#include <asm-generic/page.h>
|
|
|
|
#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
|
|
#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_PAGE_32_H */
|