mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-27 14:14:24 +08:00
15fa3e8e32
Rename _PFN_SHIFT to PFN_PTE_SHIFT. Convert a few places to call set_pte() instead of set_pte_at(). Add set_ptes(), update_mmu_cache_range(), flush_icache_pages() and flush_dcache_folio(). Change the PG_arch_1 (aka PG_dcache_dirty) flag from being per-page to per-folio. Link: https://lkml.kernel.org/r/20230802151406.3735276-18-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
127 lines
2.4 KiB
C
127 lines
2.4 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1999, 2000 by Silicon Graphics
|
|
* Copyright (C) 2003 by Ralf Baechle
|
|
*/
|
|
#include <linux/export.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <asm/fixmap.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
void pgd_init(void *addr)
|
|
{
|
|
unsigned long *p, *end;
|
|
unsigned long entry;
|
|
|
|
#if !defined(__PAGETABLE_PUD_FOLDED)
|
|
entry = (unsigned long)invalid_pud_table;
|
|
#elif !defined(__PAGETABLE_PMD_FOLDED)
|
|
entry = (unsigned long)invalid_pmd_table;
|
|
#else
|
|
entry = (unsigned long)invalid_pte_table;
|
|
#endif
|
|
|
|
p = (unsigned long *) addr;
|
|
end = p + PTRS_PER_PGD;
|
|
|
|
do {
|
|
p[0] = entry;
|
|
p[1] = entry;
|
|
p[2] = entry;
|
|
p[3] = entry;
|
|
p[4] = entry;
|
|
p += 8;
|
|
p[-3] = entry;
|
|
p[-2] = entry;
|
|
p[-1] = entry;
|
|
} while (p != end);
|
|
}
|
|
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
void pmd_init(void *addr)
|
|
{
|
|
unsigned long *p, *end;
|
|
unsigned long pagetable = (unsigned long)invalid_pte_table;
|
|
|
|
p = (unsigned long *)addr;
|
|
end = p + PTRS_PER_PMD;
|
|
|
|
do {
|
|
p[0] = pagetable;
|
|
p[1] = pagetable;
|
|
p[2] = pagetable;
|
|
p[3] = pagetable;
|
|
p[4] = pagetable;
|
|
p += 8;
|
|
p[-3] = pagetable;
|
|
p[-2] = pagetable;
|
|
p[-1] = pagetable;
|
|
} while (p != end);
|
|
}
|
|
EXPORT_SYMBOL_GPL(pmd_init);
|
|
#endif
|
|
|
|
#ifndef __PAGETABLE_PUD_FOLDED
|
|
void pud_init(void *addr)
|
|
{
|
|
unsigned long *p, *end;
|
|
unsigned long pagetable = (unsigned long)invalid_pmd_table;
|
|
|
|
p = (unsigned long *)addr;
|
|
end = p + PTRS_PER_PUD;
|
|
|
|
do {
|
|
p[0] = pagetable;
|
|
p[1] = pagetable;
|
|
p[2] = pagetable;
|
|
p[3] = pagetable;
|
|
p[4] = pagetable;
|
|
p += 8;
|
|
p[-3] = pagetable;
|
|
p[-2] = pagetable;
|
|
p[-1] = pagetable;
|
|
} while (p != end);
|
|
}
|
|
#endif
|
|
|
|
pmd_t mk_pmd(struct page *page, pgprot_t prot)
|
|
{
|
|
pmd_t pmd;
|
|
|
|
pmd_val(pmd) = (page_to_pfn(page) << PFN_PTE_SHIFT) | pgprot_val(prot);
|
|
|
|
return pmd;
|
|
}
|
|
|
|
void set_pmd_at(struct mm_struct *mm, unsigned long addr,
|
|
pmd_t *pmdp, pmd_t pmd)
|
|
{
|
|
*pmdp = pmd;
|
|
}
|
|
|
|
void __init pagetable_init(void)
|
|
{
|
|
unsigned long vaddr;
|
|
pgd_t *pgd_base;
|
|
|
|
/* Initialize the entire pgd. */
|
|
pgd_init(swapper_pg_dir);
|
|
#ifndef __PAGETABLE_PUD_FOLDED
|
|
pud_init(invalid_pud_table);
|
|
#endif
|
|
#ifndef __PAGETABLE_PMD_FOLDED
|
|
pmd_init(invalid_pmd_table);
|
|
#endif
|
|
pgd_base = swapper_pg_dir;
|
|
/*
|
|
* Fixed mappings:
|
|
*/
|
|
vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
|
|
fixrange_init(vaddr, vaddr + FIXADDR_SIZE, pgd_base);
|
|
}
|