162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * fixmaps for parisc 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> 662306a36Sopenharmony_ci */ 762306a36Sopenharmony_ci 862306a36Sopenharmony_ci#include <linux/kprobes.h> 962306a36Sopenharmony_ci#include <linux/mm.h> 1062306a36Sopenharmony_ci#include <asm/cacheflush.h> 1162306a36Sopenharmony_ci#include <asm/fixmap.h> 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_civoid notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) 1462306a36Sopenharmony_ci{ 1562306a36Sopenharmony_ci unsigned long vaddr = __fix_to_virt(idx); 1662306a36Sopenharmony_ci pgd_t *pgd = pgd_offset_k(vaddr); 1762306a36Sopenharmony_ci p4d_t *p4d = p4d_offset(pgd, vaddr); 1862306a36Sopenharmony_ci pud_t *pud = pud_offset(p4d, vaddr); 1962306a36Sopenharmony_ci pmd_t *pmd = pmd_offset(pud, vaddr); 2062306a36Sopenharmony_ci pte_t *pte; 2162306a36Sopenharmony_ci 2262306a36Sopenharmony_ci pte = pte_offset_kernel(pmd, vaddr); 2362306a36Sopenharmony_ci set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); 2462306a36Sopenharmony_ci flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); 2562306a36Sopenharmony_ci} 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_civoid notrace clear_fixmap(enum fixed_addresses idx) 2862306a36Sopenharmony_ci{ 2962306a36Sopenharmony_ci unsigned long vaddr = __fix_to_virt(idx); 3062306a36Sopenharmony_ci pte_t *pte = virt_to_kpte(vaddr); 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci if (WARN_ON(pte_none(*pte))) 3362306a36Sopenharmony_ci return; 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci pte_clear(&init_mm, vaddr, pte); 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); 3862306a36Sopenharmony_ci} 39