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Commit 31a14fae authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
Browse files

powerpc/mm: Abstraction for vmemmap and map_kernel_page() 



For hash we create vmemmap mapping using bolted hash page table entries.
For radix we fill the radix page table. The next patch will add the
radix details for creating vmemmap mappings.

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 2bfd65e4

arch/powerpc/include/asm/book3s/64/hash.h

+8 −0
Original line number Original line Diff line number Diff line
@@ -193,6 +193,14 @@ static inline void hpte_do_hugepage_flush(struct mm_struct *mm, 
}

}

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */







extern int hash__map_kernel_page(unsigned long ea, unsigned long pa,

			     unsigned long flags);

extern int __meminit hash__vmemmap_create_mapping(unsigned long start,

					      unsigned long page_size,

					      unsigned long phys);

extern void hash__vmemmap_remove_mapping(unsigned long start,

				     unsigned long page_size);

#endif /* !__ASSEMBLY__ */

#endif /* !__ASSEMBLY__ */

#endif /* __KERNEL__ */

#endif /* __KERNEL__ */

#endif /* _ASM_POWERPC_BOOK3S_64_HASH_H */
 
#endif /* _ASM_POWERPC_BOOK3S_64_HASH_H */

arch/powerpc/include/asm/book3s/64/pgtable.h

+20 −0
Original line number Original line Diff line number Diff line
@@ -722,6 +722,26 @@ extern struct page *pgd_page(pgd_t pgd); 
void pgtable_cache_add(unsigned shift, void (*ctor)(void *));

void pgtable_cache_add(unsigned shift, void (*ctor)(void *));

void pgtable_cache_init(void);

void pgtable_cache_init(void);





static inline int map_kernel_page(unsigned long ea, unsigned long pa,

				  unsigned long flags)

{

	return hash__map_kernel_page(ea, pa, flags);

}



static inline int __meminit vmemmap_create_mapping(unsigned long start,

						   unsigned long page_size,

						   unsigned long phys)

{

	return hash__vmemmap_create_mapping(start, page_size, phys);

}



#ifdef CONFIG_MEMORY_HOTPLUG

static inline void vmemmap_remove_mapping(unsigned long start,

					  unsigned long page_size)

{

	return hash__vmemmap_remove_mapping(start, page_size);

}

#endif

struct page *realmode_pfn_to_page(unsigned long pfn);

struct page *realmode_pfn_to_page(unsigned long pfn);





#ifdef CONFIG_TRANSPARENT_HUGEPAGE

#ifdef CONFIG_TRANSPARENT_HUGEPAGE

arch/powerpc/include/asm/nohash/64/pgtable.h

+7 −0
Original line number Original line Diff line number Diff line
@@ -362,6 +362,13 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry) 




void pgtable_cache_add(unsigned shift, void (*ctor)(void *));

void pgtable_cache_add(unsigned shift, void (*ctor)(void *));

void pgtable_cache_init(void);

void pgtable_cache_init(void);

extern int map_kernel_page(unsigned long ea, unsigned long pa,

			   unsigned long flags);

extern int __meminit vmemmap_create_mapping(unsigned long start,

					    unsigned long page_size,

					    unsigned long phys);

extern void vmemmap_remove_mapping(unsigned long start,

				   unsigned long page_size);

#endif /* __ASSEMBLY__ */

#endif /* __ASSEMBLY__ */





#endif /* _ASM_POWERPC_NOHASH_64_PGTABLE_H */
 
#endif /* _ASM_POWERPC_NOHASH_64_PGTABLE_H */

arch/powerpc/mm/init_64.c

+0 −5
Original line number Original line Diff line number Diff line
@@ -240,9 +240,6 @@ static __meminit void vmemmap_list_populate(unsigned long phys, 
	vmemmap_list = vmem_back;

	vmemmap_list = vmem_back;

}

}





extern int __meminit vmemmap_create_mapping(unsigned long start,

					    unsigned long page_size,

					    unsigned long phys);

int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)

int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)

{

{

	unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;

	unsigned long page_size = 1 << mmu_psize_defs[mmu_vmemmap_psize].shift;
@@ -281,8 +278,6 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node) 
}

}





#ifdef CONFIG_MEMORY_HOTPLUG

#ifdef CONFIG_MEMORY_HOTPLUG

extern void vmemmap_remove_mapping(unsigned long start,

				   unsigned long page_size);

static unsigned long vmemmap_list_free(unsigned long start)

static unsigned long vmemmap_list_free(unsigned long start)

{

{

	struct vmemmap_backing *vmem_back, *vmem_back_prev;

	struct vmemmap_backing *vmem_back, *vmem_back_prev;

arch/powerpc/mm/mmu_decl.h

+0 −5
Original line number Original line Diff line number Diff line
@@ -108,11 +108,6 @@ extern unsigned long Hash_size, Hash_mask; 




#endif /* CONFIG_PPC32 */

#endif /* CONFIG_PPC32 */





#ifdef CONFIG_PPC64

extern int map_kernel_page(unsigned long ea, unsigned long pa,

			   unsigned long flags);

#endif /* CONFIG_PPC64 */



extern unsigned long ioremap_bot;

extern unsigned long ioremap_bot;

extern unsigned long __max_low_memory;

extern unsigned long __max_low_memory;

extern phys_addr_t __initial_memory_limit_addr;

extern phys_addr_t __initial_memory_limit_addr;