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/* 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];
#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;
}
#endif /* CONFIG_PPC64 */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_PGTABLE_H */
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