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44 lines
1.0 KiB
44 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* fixmaps for parisc |
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* |
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* Copyright (c) 2019 Sven Schnelle <[email protected]> |
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*/ |
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#include <linux/kprobes.h> |
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#include <linux/mm.h> |
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#include <asm/cacheflush.h> |
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#include <asm/fixmap.h> |
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void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) |
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{ |
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unsigned long vaddr = __fix_to_virt(idx); |
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pgd_t *pgd = pgd_offset_k(vaddr); |
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p4d_t *p4d = p4d_offset(pgd, vaddr); |
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pud_t *pud = pud_offset(p4d, vaddr); |
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pmd_t *pmd = pmd_offset(pud, vaddr); |
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pte_t *pte; |
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if (pmd_none(*pmd)) |
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pmd = pmd_alloc(NULL, pud, vaddr); |
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pte = pte_offset_kernel(pmd, vaddr); |
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if (pte_none(*pte)) |
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pte = pte_alloc_kernel(pmd, vaddr); |
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set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); |
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flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); |
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} |
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void notrace clear_fixmap(enum fixed_addresses idx) |
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{ |
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unsigned long vaddr = __fix_to_virt(idx); |
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pte_t *pte = virt_to_kpte(vaddr); |
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if (WARN_ON(pte_none(*pte))) |
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return; |
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pte_clear(&init_mm, vaddr, pte); |
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flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); |
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}
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