summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/nohash/64/pgtable.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/include/asm/nohash/64/pgtable.h')
-rw-r--r--arch/powerpc/include/asm/nohash/64/pgtable.h268
1 files changed, 64 insertions, 204 deletions
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index f0ff384d4ca5..2deb955b7bc8 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -1,18 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_NOHASH_64_PGTABLE_H
#define _ASM_POWERPC_NOHASH_64_PGTABLE_H
/*
* This file contains the functions and defines necessary to modify and use
- * the ppc64 hashed page table.
+ * the ppc64 non-hashed page table.
*/
-#ifdef CONFIG_PPC_64K_PAGES
-#include <asm/nohash/64/pgtable-64k.h>
-#else
+#include <linux/sizes.h>
+
#include <asm/nohash/64/pgtable-4k.h>
-#endif
#include <asm/barrier.h>
-
-#define FIRST_USER_ADDRESS 0UL
+#include <asm/asm-const.h>
/*
* Size of EA range mapped by our pagetables.
@@ -21,21 +19,18 @@
PUD_INDEX_SIZE + PGD_INDEX_SIZE + PAGE_SHIFT)
#define PGTABLE_RANGE (ASM_CONST(1) << PGTABLE_EADDR_SIZE)
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-#define PMD_CACHE_INDEX (PMD_INDEX_SIZE + 1)
-#else
#define PMD_CACHE_INDEX PMD_INDEX_SIZE
-#endif
+#define PUD_CACHE_INDEX PUD_INDEX_SIZE
/*
* Define the address range of the kernel non-linear virtual area
*/
-#define KERN_VIRT_START ASM_CONST(0x8000000000000000)
+#define KERN_VIRT_START ASM_CONST(0xc000100000000000)
#define KERN_VIRT_SIZE ASM_CONST(0x0000100000000000)
/*
* The vmalloc space starts at the beginning of that region, and
- * occupies half of it on hash CPUs and a quarter of it on Book3E
+ * occupies a quarter of it on Book3E
* (we keep a quarter for the virtual memmap)
*/
#define VMALLOC_START KERN_VIRT_START
@@ -43,39 +38,30 @@
#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
/*
- * The second half of the kernel virtual space is used for IO mappings,
+ * The third quarter of the kernel virtual space is used for IO mappings,
* it's itself carved into the PIO region (ISA and PHB IO space) and
* the ioremap space
*
* ISA_IO_BASE = KERN_IO_START, 64K reserved area
* PHB_IO_BASE = ISA_IO_BASE + 64K to ISA_IO_BASE + 2G, PHB IO spaces
- * IOREMAP_BASE = ISA_IO_BASE + 2G to VMALLOC_START + PGTABLE_RANGE
+ * IOREMAP_BASE = ISA_IO_BASE + 2G to KERN_IO_START + KERN_IO_SIZE
*/
#define KERN_IO_START (KERN_VIRT_START + (KERN_VIRT_SIZE >> 1))
+#define KERN_IO_SIZE (KERN_VIRT_SIZE >> 2)
#define FULL_IO_SIZE 0x80000000ul
#define ISA_IO_BASE (KERN_IO_START)
#define ISA_IO_END (KERN_IO_START + 0x10000ul)
#define PHB_IO_BASE (ISA_IO_END)
#define PHB_IO_END (KERN_IO_START + FULL_IO_SIZE)
#define IOREMAP_BASE (PHB_IO_END)
-#define IOREMAP_END (KERN_VIRT_START + KERN_VIRT_SIZE)
-
-
-/*
- * Region IDs
- */
-#define REGION_SHIFT 60UL
-#define REGION_MASK (0xfUL << REGION_SHIFT)
-#define REGION_ID(ea) (((unsigned long)(ea)) >> REGION_SHIFT)
-
-#define VMALLOC_REGION_ID (REGION_ID(VMALLOC_START))
-#define KERNEL_REGION_ID (REGION_ID(PAGE_OFFSET))
-#define VMEMMAP_REGION_ID (0xfUL) /* Server only */
-#define USER_REGION_ID (0UL)
+#define IOREMAP_START (ioremap_bot)
+#define IOREMAP_END (KERN_IO_START + KERN_IO_SIZE - FIXADDR_SIZE)
+#define FIXADDR_SIZE SZ_32M
+#define FIXADDR_TOP (IOREMAP_END + FIXADDR_SIZE)
/*
* Defines the address of the vmemap area, in its own region on
- * hash table CPUs and after the vmalloc space on Book3E
+ * after the vmalloc space on Book3E
*/
#define VMEMMAP_BASE VMALLOC_END
#define VMEMMAP_END KERN_IO_START
@@ -85,10 +71,13 @@
/*
* Include the PTE bits definitions
*/
-#include <asm/nohash/pte-book3e.h>
-#include <asm/pte-common.h>
+#include <asm/nohash/pte-e500.h>
+
+#define PTE_RPN_MASK (~((1UL << PTE_RPN_SHIFT) - 1))
-#ifndef __ASSEMBLY__
+#define H_PAGE_4K_PFN 0
+
+#ifndef __ASSEMBLER__
/* pte_clear moved to later in this file */
#define PMD_BAD_BITS (PTE_TABLE_SIZE-1)
@@ -113,8 +102,9 @@ static inline pte_t pmd_pte(pmd_t pmd)
#define pmd_bad(pmd) (!is_kernel_addr(pmd_val(pmd)) \
|| (pmd_val(pmd) & PMD_BAD_BITS))
#define pmd_present(pmd) (!pmd_none(pmd))
-#define pmd_page_vaddr(pmd) (pmd_val(pmd) & ~PMD_MASKED_BITS)
+#define pmd_page_vaddr(pmd) ((const void *)(pmd_val(pmd) & ~PMD_MASKED_BITS))
extern struct page *pmd_page(pmd_t pmd);
+#define pmd_pfn(pmd) (page_to_pfn(pmd_page(pmd)))
static inline void pud_set(pud_t *pudp, unsigned long val)
{
@@ -130,7 +120,11 @@ static inline void pud_clear(pud_t *pudp)
#define pud_bad(pud) (!is_kernel_addr(pud_val(pud)) \
|| (pud_val(pud) & PUD_BAD_BITS))
#define pud_present(pud) (pud_val(pud) != 0)
-#define pud_page_vaddr(pud) (pud_val(pud) & ~PUD_MASKED_BITS)
+
+static inline pmd_t *pud_pgtable(pud_t pud)
+{
+ return (pmd_t *)(pud_val(pud) & ~PUD_MASKED_BITS);
+}
extern struct page *pud_page(pud_t pud);
@@ -144,211 +138,77 @@ static inline pud_t pte_pud(pte_t pte)
return __pud(pte_val(pte));
}
#define pud_write(pud) pte_write(pud_pte(pud))
-#define pgd_write(pgd) pte_write(pgd_pte(pgd))
-
-static inline void pgd_set(pgd_t *pgdp, unsigned long val)
-{
- *pgdp = __pgd(val);
-}
-
-/*
- * Find an entry in a page-table-directory. We combine the address region
- * (the high order N bits) and the pgd portion of the address.
- */
-#define pgd_index(address) (((address) >> (PGDIR_SHIFT)) & (PTRS_PER_PGD - 1))
-
-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
-
-#define pmd_offset(pudp,addr) \
- (((pmd_t *) pud_page_vaddr(*(pudp))) + (((addr) >> PMD_SHIFT) & (PTRS_PER_PMD - 1)))
-
-#define pte_offset_kernel(dir,addr) \
- (((pte_t *) pmd_page_vaddr(*(dir))) + (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
-
-#define pte_offset_map(dir,addr) pte_offset_kernel((dir), (addr))
-#define pte_unmap(pte) do { } while(0)
-
-/* to find an entry in a kernel page-table-directory */
-/* This now only contains the vmalloc pages */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, unsigned long pte, int huge);
-
-/* Atomic PTE updates */
-static inline unsigned long pte_update(struct mm_struct *mm,
- unsigned long addr,
- pte_t *ptep, unsigned long clr,
- unsigned long set,
- int huge)
-{
-#ifdef PTE_ATOMIC_UPDATES
- unsigned long old, tmp;
-
- __asm__ __volatile__(
- "1: ldarx %0,0,%3 # pte_update\n\
- andi. %1,%0,%6\n\
- bne- 1b \n\
- andc %1,%0,%4 \n\
- or %1,%1,%7\n\
- stdcx. %1,0,%3 \n\
- bne- 1b"
- : "=&r" (old), "=&r" (tmp), "=m" (*ptep)
- : "r" (ptep), "r" (clr), "m" (*ptep), "i" (_PAGE_BUSY), "r" (set)
- : "cc" );
-#else
- unsigned long old = pte_val(*ptep);
- *ptep = __pte((old & ~clr) | set);
-#endif
- /* huge pages use the old page table lock */
- if (!huge)
- assert_pte_locked(mm, addr);
-
-#ifdef CONFIG_PPC_STD_MMU_64
- if (old & _PAGE_HASHPTE)
- hpte_need_flush(mm, addr, ptep, old, huge);
-#endif
-
- return old;
-}
-
-static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
- unsigned long addr, pte_t *ptep)
-{
- unsigned long old;
-
- if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0)
- return 0;
- old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
- return (old & _PAGE_ACCESSED) != 0;
-}
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
-({ \
- int __r; \
- __r = __ptep_test_and_clear_young((__vma)->vm_mm, __addr, __ptep); \
- __r; \
-})
+#define p4d_write(pgd) pte_write(p4d_pte(p4d))
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep)
+static inline void p4d_set(p4d_t *p4dp, unsigned long val)
{
-
- if ((pte_val(*ptep) & _PAGE_RW) == 0)
- return;
-
- pte_update(mm, addr, ptep, _PAGE_RW, 0, 0);
+ *p4dp = __p4d(val);
}
+#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
- if ((pte_val(*ptep) & _PAGE_RW) == 0)
- return;
-
- pte_update(mm, addr, ptep, _PAGE_RW, 0, 1);
+ pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 1);
}
-/*
- * We currently remove entries from the hashtable regardless of whether
- * the entry was young or dirty. The generic routines only flush if the
- * entry was young or dirty which is not good enough.
- *
- * We should be more intelligent about this but for the moment we override
- * these functions and force a tlb flush unconditionally
- */
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
#define ptep_clear_flush_young(__vma, __address, __ptep) \
({ \
- int __young = __ptep_test_and_clear_young((__vma)->vm_mm, __address, \
- __ptep); \
+ int __young = ptep_test_and_clear_young(__vma, __address, __ptep);\
__young; \
})
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
- unsigned long addr, pte_t *ptep)
-{
- unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
- return __pte(old);
-}
-
-static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
- pte_t * ptep)
-{
- pte_update(mm, addr, ptep, ~0UL, 0, 0);
-}
-
-
-/* Set the dirty and/or accessed bits atomically in a linux PTE, this
- * function doesn't need to flush the hash entry
- */
-static inline void __ptep_set_access_flags(struct mm_struct *mm,
- pte_t *ptep, pte_t entry,
- unsigned long address)
-{
- unsigned long bits = pte_val(entry) &
- (_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_RW | _PAGE_EXEC);
-
-#ifdef PTE_ATOMIC_UPDATES
- unsigned long old, tmp;
-
- __asm__ __volatile__(
- "1: ldarx %0,0,%4\n\
- andi. %1,%0,%6\n\
- bne- 1b \n\
- or %0,%3,%0\n\
- stdcx. %0,0,%4\n\
- bne- 1b"
- :"=&r" (old), "=&r" (tmp), "=m" (*ptep)
- :"r" (bits), "r" (ptep), "m" (*ptep), "i" (_PAGE_BUSY)
- :"cc");
-#else
- unsigned long old = pte_val(*ptep);
- *ptep = __pte(old | bits);
-#endif
-}
-
-#define __HAVE_ARCH_PTE_SAME
-#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0)
-
-#define pte_ERROR(e) \
- pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
#define pmd_ERROR(e) \
pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
-/* Encode and de-code a swap entry */
+/*
+ * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that
+ * are !pte_none() && !pte_present().
+ *
+ * Format of swap PTEs:
+ *
+ * 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
+ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * <-------------------------- offset ----------------------------
+ *
+ * 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 6 6 6 6
+ * 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
+ * --------------> <----------- zero ------------> E < type -> 0 0
+ *
+ * E is the exclusive marker that is not stored in swap entries.
+ */
#define MAX_SWAPFILES_CHECK() do { \
BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS); \
- /* \
- * Don't have overlapping bits with _PAGE_HPTEFLAGS \
- * We filter HPTEFLAGS on set_pte. \
- */ \
- BUILD_BUG_ON(_PAGE_HPTEFLAGS & (0x1f << _PAGE_BIT_SWAP_TYPE)); \
} while (0)
-/*
- * on pte we don't need handle RADIX_TREE_EXCEPTIONAL_SHIFT;
- */
+
#define SWP_TYPE_BITS 5
-#define __swp_type(x) (((x).val >> _PAGE_BIT_SWAP_TYPE) \
+#define __swp_type(x) (((x).val >> 2) \
& ((1UL << SWP_TYPE_BITS) - 1))
#define __swp_offset(x) ((x).val >> PTE_RPN_SHIFT)
#define __swp_entry(type, offset) ((swp_entry_t) { \
- ((type) << _PAGE_BIT_SWAP_TYPE) \
+ (((type) & 0x1f) << 2) \
| ((offset) << PTE_RPN_SHIFT) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) })
#define __swp_entry_to_pte(x) __pte((x).val)
-extern int map_kernel_page(unsigned long ea, unsigned long pa,
- unsigned long flags);
+/* We borrow MSB 56 (LSB 7) to store the exclusive marker in swap PTEs. */
+#define _PAGE_SWP_EXCLUSIVE 0x80
+
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__ */
+void __patch_exception(int exc, unsigned long addr);
+#define patch_exception(exc, name) do { \
+ extern unsigned int name; \
+ __patch_exception((exc), (unsigned long)&name); \
+} while (0)
+
+#endif /* __ASSEMBLER__ */
#endif /* _ASM_POWERPC_NOHASH_64_PGTABLE_H */
generated by cgit (git 2.34.1) at 2025-12-27 09:56:59 +0000