diff options
Diffstat (limited to 'arch/powerpc/include/asm/page.h')
| -rw-r--r-- | arch/powerpc/include/asm/page.h | 89 |
1 files changed, 22 insertions, 67 deletions
diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h index e5f75c70eda8..af9a2628d1df 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -9,6 +9,7 @@ #ifndef __ASSEMBLY__ #include <linux/types.h> #include <linux/kernel.h> +#include <linux/bug.h> #else #include <asm/types.h> #endif @@ -20,8 +21,7 @@ * page size. When using 64K pages however, whether we are really supporting * 64K pages in HW or not is irrelevant to those definitions. */ -#define PAGE_SHIFT CONFIG_PPC_PAGE_SHIFT -#define PAGE_SIZE (ASM_CONST(1) << PAGE_SHIFT) +#include <vdso/page.h> #ifndef __ASSEMBLY__ #ifndef CONFIG_HUGETLB_PAGE @@ -31,7 +31,7 @@ extern unsigned int hpage_shift; #define HPAGE_SHIFT hpage_shift #elif defined(CONFIG_PPC_8xx) #define HPAGE_SHIFT 19 /* 512k pages */ -#elif defined(CONFIG_PPC_FSL_BOOK3E) +#elif defined(CONFIG_PPC_E500) #define HPAGE_SHIFT 22 /* 4M pages */ #endif #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) @@ -41,13 +41,6 @@ extern unsigned int hpage_shift; #endif /* - * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we - * assign PAGE_MASK to a larger type it gets extended the way we want - * (i.e. with 1s in the high bits) - */ -#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) - -/* * KERNELBASE is the virtual address of the start of the kernel, it's often * the same as PAGE_OFFSET, but _might not be_. * @@ -117,27 +110,8 @@ extern long long virt_phys_offset; #ifdef CONFIG_FLATMEM #define ARCH_PFN_OFFSET ((unsigned long)(MEMORY_START >> PAGE_SHIFT)) -#ifndef __ASSEMBLY__ -extern unsigned long max_mapnr; -static inline bool pfn_valid(unsigned long pfn) -{ - unsigned long min_pfn = ARCH_PFN_OFFSET; - - return pfn >= min_pfn && pfn < max_mapnr; -} -#endif #endif -#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) -#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) -#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) - -#define virt_addr_valid(vaddr) ({ \ - unsigned long _addr = (unsigned long)vaddr; \ - _addr >= PAGE_OFFSET && _addr < (unsigned long)high_memory && \ - pfn_valid(virt_to_pfn(_addr)); \ -}) - /* * On Book-E parts we need __va to parse the device tree and we can't * determine MEMORY_START until then. However we can determine PHYSICAL_START @@ -242,6 +216,25 @@ static inline bool pfn_valid(unsigned long pfn) #endif #endif +#ifndef __ASSEMBLY__ +static inline unsigned long virt_to_pfn(const void *kaddr) +{ + return __pa(kaddr) >> PAGE_SHIFT; +} + +static inline const void *pfn_to_kaddr(unsigned long pfn) +{ + return __va(pfn << PAGE_SHIFT); +} +#endif + +#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) +#define virt_addr_valid(vaddr) ({ \ + unsigned long _addr = (unsigned long)vaddr; \ + _addr >= PAGE_OFFSET && _addr < (unsigned long)high_memory && \ + pfn_valid(virt_to_pfn((void *)_addr)); \ +}) + /* * Unfortunately the PLT is in the BSS in the PPC32 ELF ABI, * and needs to be executable. This means the whole heap ends @@ -268,38 +261,6 @@ static inline bool pfn_valid(unsigned long pfn) #define is_kernel_addr(x) ((x) >= TASK_SIZE) #endif -#ifndef CONFIG_PPC_BOOK3S_64 -/* - * Use the top bit of the higher-level page table entries to indicate whether - * the entries we point to contain hugepages. This works because we know that - * the page tables live in kernel space. If we ever decide to support having - * page tables at arbitrary addresses, this breaks and will have to change. - */ -#ifdef CONFIG_PPC64 -#define PD_HUGE 0x8000000000000000UL -#else -#define PD_HUGE 0x80000000 -#endif - -#else /* CONFIG_PPC_BOOK3S_64 */ -/* - * Book3S 64 stores real addresses in the hugepd entries to - * avoid overlaps with _PAGE_PRESENT and _PAGE_PTE. - */ -#define HUGEPD_ADDR_MASK (0x0ffffffffffffffful & ~HUGEPD_SHIFT_MASK) -#endif /* CONFIG_PPC_BOOK3S_64 */ - -/* - * Some number of bits at the level of the page table that points to - * a hugepte are used to encode the size. This masks those bits. - * On 8xx, HW assistance requires 4k alignment for the hugepte. - */ -#ifdef CONFIG_PPC_8xx -#define HUGEPD_SHIFT_MASK 0xfff -#else -#define HUGEPD_SHIFT_MASK 0x3f -#endif - #ifndef __ASSEMBLY__ #ifdef CONFIG_PPC_BOOK3S_64 @@ -308,12 +269,6 @@ static inline bool pfn_valid(unsigned long pfn) #include <asm/pgtable-types.h> #endif - -#ifndef CONFIG_HUGETLB_PAGE -#define is_hugepd(pdep) (0) -#define pgd_huge(pgd) (0) -#endif /* CONFIG_HUGETLB_PAGE */ - struct page; extern void clear_user_page(void *page, unsigned long vaddr, struct page *pg); extern void copy_user_page(void *to, void *from, unsigned long vaddr, |