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/parisc/mm/fixmap.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 arch/parisc/mm/fixmap.c (limited to 'arch/parisc/mm/fixmap.c') diff --git a/arch/parisc/mm/fixmap.c b/arch/parisc/mm/fixmap.c new file mode 100644 index 000000000..cc15d737f --- /dev/null +++ b/arch/parisc/mm/fixmap.c @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * fixmaps for parisc + * + * Copyright (c) 2019 Sven Schnelle + */ + +#include +#include +#include +#include + +void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) +{ + unsigned long vaddr = __fix_to_virt(idx); + pgd_t *pgd = pgd_offset_k(vaddr); + p4d_t *p4d = p4d_offset(pgd, vaddr); + pud_t *pud = pud_offset(p4d, vaddr); + pmd_t *pmd = pmd_offset(pud, vaddr); + pte_t *pte; + + if (pmd_none(*pmd)) + pte = pte_alloc_kernel(pmd, vaddr); + + pte = pte_offset_kernel(pmd, vaddr); + set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); + flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); +} + +void notrace clear_fixmap(enum fixed_addresses idx) +{ + unsigned long vaddr = __fix_to_virt(idx); + pte_t *pte = virt_to_kpte(vaddr); + + if (WARN_ON(pte_none(*pte))) + return; + + pte_clear(&init_mm, vaddr, pte); + + flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); +} -- cgit v1.2.3