/* SPDX-License-Identifier: GPL-2.0 */
|
// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
|
|
#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))));
|
}
|
|
#define pmd_pgtable(pmd) pmd_page(pmd)
|
|
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_pages(GFP_KERNEL, PGD_ORDER);
|
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 pre_mmu_init(void);
|
extern void pre_trap_init(void);
|
|
#endif /* __ASM_CSKY_PGALLOC_H */
|
