Orange Pi5 kernel

/*
 * 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(unsigned long page)
{
<------>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 *) page;
<------>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(unsigned long addr, unsigned long pagetable)
{
<------>unsigned long *p, *end;
 
<------>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(unsigned long addr, unsigned long pagetable)
{
<------>unsigned long *p, *end;
 
<------>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_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;
<------>flush_tlb_all();
}
 
void __init pagetable_init(void)
{
<------>unsigned long vaddr;
<------>pgd_t *pgd_base;
 
<------>/* Initialize the entire pgd.  */
<------>pgd_init((unsigned long)swapper_pg_dir);
#ifndef __PAGETABLE_PUD_FOLDED
<------>pud_init((unsigned long)invalid_pud_table, (unsigned long)invalid_pmd_table);
#endif
#ifndef __PAGETABLE_PMD_FOLDED
<------>pmd_init((unsigned long)invalid_pmd_table, (unsigned long)invalid_pte_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);
}