Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Sven Schnelle |
167 |
86.53% |
3 |
50.00% |
| Mike Rapoport |
24 |
12.44% |
2 |
33.33% |
| Helge Deller |
2 |
1.04% |
1 |
16.67% |
| Total |
193 |
|
6 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* fixmaps for parisc
*
* Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>
*/
#include <linux/kprobes.h>
#include <linux/mm.h>
#include <asm/cacheflush.h>
#include <asm/fixmap.h>
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);
}