[PATCH 24/65] powerpc/mm/radix: Add radix pte defines
Aneesh Kumar K.V
aneesh.kumar at linux.vnet.ibm.com
Sun Mar 27 19:23:32 AEDT 2016
This add PowerISA 3.0 specific pte defines. We share most of the
details with hash linux page table format. This patch indicate only
things where we differ
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 1 +
arch/powerpc/include/asm/book3s/64/radix-4k.h | 12 +++
arch/powerpc/include/asm/book3s/64/radix-64k.h | 12 +++
arch/powerpc/include/asm/book3s/64/radix.h | 128 +++++++++++++++++++++++++
4 files changed, 153 insertions(+)
create mode 100644 arch/powerpc/include/asm/book3s/64/radix-4k.h
create mode 100644 arch/powerpc/include/asm/book3s/64/radix-64k.h
create mode 100644 arch/powerpc/include/asm/book3s/64/radix.h
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index de3fef1f2dbe..d59292459f5e 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -205,6 +205,7 @@ extern unsigned long __pgd_table_size;
#endif /* __ASSEMBLY__ */
#include <asm/book3s/64/hash.h>
+#include <asm/book3s/64/radix.h>
#include <asm/barrier.h>
/*
diff --git a/arch/powerpc/include/asm/book3s/64/radix-4k.h b/arch/powerpc/include/asm/book3s/64/radix-4k.h
new file mode 100644
index 000000000000..1966ee977206
--- /dev/null
+++ b/arch/powerpc/include/asm/book3s/64/radix-4k.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_POWERPC_PGTABLE_RADIX_4K_H
+#define _ASM_POWERPC_PGTABLE_RADIX_4K_H
+
+/*
+ * For 4K page size supported index is 13/9/9/9
+ */
+#define R_PTE_INDEX_SIZE 9 /* 2MB huge page */
+#define R_PMD_INDEX_SIZE 9 /* 1G huge page */
+#define R_PUD_INDEX_SIZE 9
+#define R_PGD_INDEX_SIZE 13
+
+#endif /* _ASM_POWERPC_PGTABLE_RADIX_4K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/radix-64k.h b/arch/powerpc/include/asm/book3s/64/radix-64k.h
new file mode 100644
index 000000000000..fe1cebe55e01
--- /dev/null
+++ b/arch/powerpc/include/asm/book3s/64/radix-64k.h
@@ -0,0 +1,12 @@
+#ifndef _ASM_POWERPC_PGTABLE_RADIX_64K_H
+#define _ASM_POWERPC_PGTABLE_RADIX_64K_H
+
+/*
+ * For 64K page size supported index is 13/9/9/5
+ */
+#define R_PTE_INDEX_SIZE 5 /* 2MB huge page */
+#define R_PMD_INDEX_SIZE 9 /* 1G huge page */
+#define R_PUD_INDEX_SIZE 9
+#define R_PGD_INDEX_SIZE 13
+
+#endif /* _ASM_POWERPC_PGTABLE_RADIX_64K_H */
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
new file mode 100644
index 000000000000..72e18d5c96b4
--- /dev/null
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -0,0 +1,128 @@
+#ifndef _ASM_POWERPC_PGTABLE_RADIX_H
+#define _ASM_POWERPC_PGTABLE_RADIX_H
+
+#ifndef __ASSEMBLY__
+#include <asm/cmpxchg.h>
+#endif
+
+#ifdef CONFIG_PPC_64K_PAGES
+#include <asm/book3s/64/radix-64k.h>
+#else
+#include <asm/book3s/64/radix-4k.h>
+#endif
+
+/* An empty PTE can still have a R or C writeback */
+#define R_PTE_NONE_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
+
+/* Bits to set in a RPMD/RPUD/RPGD */
+#define R_PMD_VAL_BITS (0x8000000000000000UL | R_PTE_INDEX_SIZE)
+#define R_PUD_VAL_BITS (0x8000000000000000UL | R_PMD_INDEX_SIZE)
+#define R_PGD_VAL_BITS (0x8000000000000000UL | R_PUD_INDEX_SIZE)
+
+/* Don't have anything in the reserved bits and leaf bits */
+#define R_PMD_BAD_BITS 0x60000000000000e0UL
+#define R_PUD_BAD_BITS 0x60000000000000e0UL
+#define R_PGD_BAD_BITS 0x60000000000000e0UL
+
+/*
+ * Size of EA range mapped by our pagetables.
+ */
+#define R_PGTABLE_EADDR_SIZE (R_PTE_INDEX_SIZE + R_PMD_INDEX_SIZE + \
+ R_PUD_INDEX_SIZE + R_PGD_INDEX_SIZE + PAGE_SHIFT)
+#define R_PGTABLE_RANGE (ASM_CONST(1) << R_PGTABLE_EADDR_SIZE)
+
+#ifndef __ASSEMBLY__
+#define R_PTE_TABLE_SIZE (sizeof(pte_t) << R_PTE_INDEX_SIZE)
+#define R_PMD_TABLE_SIZE (sizeof(pmd_t) << R_PMD_INDEX_SIZE)
+#define R_PUD_TABLE_SIZE (sizeof(pud_t) << R_PUD_INDEX_SIZE)
+#define R_PGD_TABLE_SIZE (sizeof(pgd_t) << R_PGD_INDEX_SIZE)
+
+static inline unsigned long rpte_update(struct mm_struct *mm,
+ unsigned long addr,
+ pte_t *ptep, unsigned long clr,
+ unsigned long set,
+ int huge)
+{
+
+ pte_t pte;
+ unsigned long old_pte, new_pte;
+
+ do {
+ pte = READ_ONCE(*ptep);
+ old_pte = pte_val(pte);
+ new_pte = (old_pte | set) & ~clr;
+
+ } while (cpu_to_be64(old_pte) != __cmpxchg_u64((unsigned long *)ptep,
+ cpu_to_be64(old_pte),
+ cpu_to_be64(new_pte)));
+ /* We already do a sync in cmpxchg, is ptesync needed ?*/
+ asm volatile("ptesync" : : : "memory");
+ /* huge pages use the old page table lock */
+ if (!huge)
+ assert_pte_locked(mm, addr);
+
+ return old_pte;
+}
+
+/*
+ * Set the dirty and/or accessed bits atomically in a linux PTE, this
+ * function doesn't need to invalidate tlb.
+ */
+static inline void __rptep_set_access_flags(pte_t *ptep, pte_t entry)
+{
+ pte_t pte;
+ unsigned long old_pte, new_pte;
+ unsigned long set = pte_val(entry) & (_PAGE_DIRTY | _PAGE_ACCESSED |
+ _PAGE_RW | _PAGE_EXEC);
+ do {
+ pte = READ_ONCE(*ptep);
+ old_pte = pte_val(pte);
+ new_pte = old_pte | set;
+
+ } while (cpu_to_be64(old_pte) != __cmpxchg_u64((unsigned long *)ptep,
+ cpu_to_be64(old_pte),
+ cpu_to_be64(new_pte)));
+ /* We already do a sync in cmpxchg, is ptesync needed ?*/
+ asm volatile("ptesync" : : : "memory");
+}
+
+static inline int rpte_same(pte_t pte_a, pte_t pte_b)
+{
+ return ((pte_val(pte_a) == pte_val(pte_b)));
+}
+
+static inline int rpte_none(pte_t pte)
+{
+ return (pte_val(pte) & ~R_PTE_NONE_MASK) == 0;
+}
+
+static inline void __set_rpte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte, int percpu)
+{
+ *ptep = pte;
+ asm volatile("ptesync" : : : "memory");
+}
+
+static inline int rpmd_bad(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & R_PMD_BAD_BITS);
+}
+
+static inline int rpmd_same(pmd_t pmd_a, pmd_t pmd_b)
+{
+ return ((pmd_val(pmd_a) == pmd_val(pmd_b)));
+}
+
+static inline int rpud_bad(pud_t pud)
+{
+ return !!(pud_val(pud) & R_PUD_BAD_BITS);
+}
+
+
+static inline int rpgd_bad(pgd_t pgd)
+{
+ return !!(pgd_val(pgd) & R_PGD_BAD_BITS);
+}
+
+#endif /* __ASSEMBLY__ */
+#endif
--
2.5.0
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