From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/csky/include/asm/pgalloc.h | 74 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 arch/csky/include/asm/pgalloc.h (limited to 'arch/csky/include/asm/pgalloc.h') 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 +#include +#include + +#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL +#include + +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 */ -- cgit v1.2.3