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Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/include/asm/pgtable.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h new file mode 100644 index 000000000..283f40d05 --- /dev/null +++ b/arch/powerpc/include/asm/pgtable.h @@ -0,0 +1,182 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_POWERPC_PGTABLE_H +#define _ASM_POWERPC_PGTABLE_H + +#ifndef __ASSEMBLY__ +#include <linux/mmdebug.h> +#include <linux/mmzone.h> +#include <asm/processor.h> /* For TASK_SIZE */ +#include <asm/mmu.h> +#include <asm/page.h> +#include <asm/tlbflush.h> + +struct mm_struct; + +#endif /* !__ASSEMBLY__ */ + +#ifdef CONFIG_PPC_BOOK3S +#include <asm/book3s/pgtable.h> +#else +#include <asm/nohash/pgtable.h> +#endif /* !CONFIG_PPC_BOOK3S */ + +/* + * Protection used for kernel text. We want the debuggers to be able to + * set breakpoints anywhere, so don't write protect the kernel text + * on platforms where such control is possible. + */ +#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) || \ + defined(CONFIG_KPROBES) || defined(CONFIG_DYNAMIC_FTRACE) +#define PAGE_KERNEL_TEXT PAGE_KERNEL_X +#else +#define PAGE_KERNEL_TEXT PAGE_KERNEL_ROX +#endif + +/* Make modules code happy. We don't set RO yet */ +#define PAGE_KERNEL_EXEC PAGE_KERNEL_X + +/* Advertise special mapping type for AGP */ +#define PAGE_AGP (PAGE_KERNEL_NC) +#define HAVE_PAGE_AGP + +#ifndef __ASSEMBLY__ + +#ifndef MAX_PTRS_PER_PGD +#define MAX_PTRS_PER_PGD PTRS_PER_PGD +#endif + +/* Keep these as a macros to avoid include dependency mess */ +#define pte_page(x) pfn_to_page(pte_pfn(x)) +#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +/* + * Select all bits except the pfn + */ +static inline pgprot_t pte_pgprot(pte_t pte) +{ + unsigned long pte_flags; + + pte_flags = pte_val(pte) & ~PTE_RPN_MASK; + return __pgprot(pte_flags); +} + +#ifndef pmd_page_vaddr +static inline unsigned long pmd_page_vaddr(pmd_t pmd) +{ + return ((unsigned long)__va(pmd_val(pmd) & ~PMD_MASKED_BITS)); +} +#define pmd_page_vaddr pmd_page_vaddr +#endif +/* + * ZERO_PAGE is a global shared page that is always zero: used + * for zero-mapped memory areas etc.. + */ +extern unsigned long empty_zero_page[]; +#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) + +extern pgd_t swapper_pg_dir[]; + +extern void paging_init(void); +void poking_init(void); + +extern unsigned long ioremap_bot; +extern const pgprot_t protection_map[16]; + +/* + * kern_addr_valid is intended to indicate whether an address is a valid + * kernel address. Most 32-bit archs define it as always true (like this) + * but most 64-bit archs actually perform a test. What should we do here? + */ +#define kern_addr_valid(addr) (1) + +#ifndef CONFIG_TRANSPARENT_HUGEPAGE +#define pmd_large(pmd) 0 +#endif + +/* can we use this in kvm */ +unsigned long vmalloc_to_phys(void *vmalloc_addr); + +void pgtable_cache_add(unsigned int shift); + +pte_t *early_pte_alloc_kernel(pmd_t *pmdp, unsigned long va); + +#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_PPC32) +void mark_initmem_nx(void); +#else +static inline void mark_initmem_nx(void) { } +#endif + +/* + * When used, PTE_FRAG_NR is defined in subarch pgtable.h + * so we are sure it is included when arriving here. + */ +#ifdef PTE_FRAG_NR +static inline void *pte_frag_get(mm_context_t *ctx) +{ + return ctx->pte_frag; +} + +static inline void pte_frag_set(mm_context_t *ctx, void *p) +{ + ctx->pte_frag = p; +} +#else +#define PTE_FRAG_NR 1 +#define PTE_FRAG_SIZE_SHIFT PAGE_SHIFT +#define PTE_FRAG_SIZE (1UL << PTE_FRAG_SIZE_SHIFT) + +static inline void *pte_frag_get(mm_context_t *ctx) +{ + return NULL; +} + +static inline void pte_frag_set(mm_context_t *ctx, void *p) +{ +} +#endif + +#ifndef pmd_is_leaf +#define pmd_is_leaf pmd_is_leaf +static inline bool pmd_is_leaf(pmd_t pmd) +{ + return false; +} +#endif + +#ifndef pud_is_leaf +#define pud_is_leaf pud_is_leaf +static inline bool pud_is_leaf(pud_t pud) +{ + return false; +} +#endif + +#ifndef p4d_is_leaf +#define p4d_is_leaf p4d_is_leaf +static inline bool p4d_is_leaf(p4d_t p4d) +{ + return false; +} +#endif + +#define pmd_pgtable pmd_pgtable +static inline pgtable_t pmd_pgtable(pmd_t pmd) +{ + return (pgtable_t)pmd_page_vaddr(pmd); +} + +#ifdef CONFIG_PPC64 +#define is_ioremap_addr is_ioremap_addr +static inline bool is_ioremap_addr(const void *x) +{ + unsigned long addr = (unsigned long)x; + + return addr >= IOREMAP_BASE && addr < IOREMAP_END; +} + +struct seq_file; +void arch_report_meminfo(struct seq_file *m); +#endif /* CONFIG_PPC64 */ + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_POWERPC_PGTABLE_H */ |