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-rw-r--r--arch/csky/include/asm/pgalloc.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/csky/include/asm/pgalloc.h b/arch/csky/include/asm/pgalloc.h
new file mode 100644
index 000000000..7d57e5da0
--- /dev/null
+++ b/arch/csky/include/asm/pgalloc.h
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ASM_CSKY_PGALLOC_H
+#define __ASM_CSKY_PGALLOC_H
+
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+
+#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
+#include <asm-generic/pgalloc.h>
+
+static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
+ pte_t *pte)
+{
+ set_pmd(pmd, __pmd(__pa(pte)));
+}
+
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
+ pgtable_t pte)
+{
+ set_pmd(pmd, __pmd(__pa(page_address(pte))));
+}
+
+extern void pgd_init(unsigned long *p);
+
+static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
+{
+ pte_t *pte;
+ unsigned long i;
+
+ pte = (pte_t *) __get_free_page(GFP_KERNEL);
+ if (!pte)
+ return NULL;
+
+ for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)
+ (pte + i)->pte_low = _PAGE_GLOBAL;
+
+ return pte;
+}
+
+static inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ pgd_t *ret;
+ pgd_t *init;
+
+ ret = (pgd_t *) __get_free_page(GFP_KERNEL);
+ if (ret) {
+ init = pgd_offset(&init_mm, 0UL);
+ pgd_init((unsigned long *)ret);
+ memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+ /* prevent out of order excute */
+ smp_mb();
+#ifdef CONFIG_CPU_NEED_TLBSYNC
+ dcache_wb_range((unsigned int)ret,
+ (unsigned int)(ret + PTRS_PER_PGD));
+#endif
+ }
+
+ return ret;
+}
+
+#define __pte_free_tlb(tlb, pte, address) \
+do { \
+ pgtable_pte_page_dtor(pte); \
+ tlb_remove_page(tlb, pte); \
+} while (0)
+
+extern void pagetable_init(void);
+extern void mmu_init(unsigned long min_pfn, unsigned long max_pfn);
+extern void pre_trap_init(void);
+
+#endif /* __ASM_CSKY_PGALLOC_H */