// SPDX-License-Identifier: GPL-2.0
/*
* linux / arch / m68k / mm / init . c
*
* Copyright ( C ) 1995 Hamish Macdonald
*
* Contains common initialization routines , specific init code moved
* to motorola . c and sun3mmu . c
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/memblock.h>
#include <linux/gfp.h>
#include <asm /setup.h>
#include <linux/uaccess.h>
#include <asm /page.h>
#include <asm /pgalloc.h>
#include <asm /traps.h>
#include <asm /machdep.h>
#include <asm /io.h>
#ifdef CONFIG_ATARI
#include <asm /atari_stram.h>
#endif
#include <asm /sections.h>
#include <asm /tlb.h>
/*
* ZERO_PAGE is a special page that is used for zero - initialized
* data and COW .
*/
void *empty_zero_page;
EXPORT_SYMBOL(empty_zero_page);
#ifdef CONFIG_MMU
int m68k_virt_to_node_shift;
void __init m68k_setup_node(int node)
{
node_set_online(node);
}
#else /* CONFIG_MMU */
/*
* paging_init ( ) continues the virtual memory environment setup which
* was begun by the code in arch / head . S .
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory .
*/
void __init paging_init(void )
{
/*
* Make sure start_mem is page aligned , otherwise bootmem and
* page_alloc get different views of the world .
*/
unsigned long end_mem = memory_end & PAGE_MASK;
unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 , };
high_memory = (void *) end_mem;
empty_zero_page = memblock_alloc_or_panic(PAGE_SIZE, PAGE_SIZE);
max_zone_pfn[ZONE_DMA] = end_mem >> PAGE_SHIFT;
free_area_init(max_zone_pfn);
}
#endif /* CONFIG_MMU */
void free_initmem(void )
{
#ifndef CONFIG_MMU_SUN3
free_initmem_default(-1 );
#endif /* CONFIG_MMU_SUN3 */
}
#if defined (CONFIG_MMU) && !defined (CONFIG_COLDFIRE)
#define VECTORS &vectors[0 ]
#else
#define VECTORS _ramvec
#endif
static inline void init_pointer_tables(void )
{
#if defined (CONFIG_MMU) && !defined (CONFIG_SUN3) && !defined (CONFIG_COLDFIRE)
int i, j;
/* insert pointer tables allocated so far into the tablelist */
init_pointer_table(kernel_pg_dir, TABLE_PGD);
for (i = 0 ; i < PTRS_PER_PGD; i++) {
pud_t *pud = (pud_t *)&kernel_pg_dir[i];
pmd_t *pmd_dir;
if (!pud_present(*pud))
continue ;
pmd_dir = (pmd_t *)pgd_page_vaddr(kernel_pg_dir[i]);
init_pointer_table(pmd_dir, TABLE_PMD);
for (j = 0 ; j < PTRS_PER_PMD; j++) {
pmd_t *pmd = &pmd_dir[j];
pte_t *pte_dir;
if (!pmd_present(*pmd))
continue ;
pte_dir = (pte_t *)pmd_page_vaddr(*pmd);
init_pointer_table(pte_dir, TABLE_PTE);
}
}
#endif
}
void __init mem_init(void )
{
init_pointer_tables();
}
Messung V0.5 in Prozent C=76 H=98 G=87
¤ Dauer der Verarbeitung: 0.11 Sekunden
(vorverarbeitet am 2026-09-28)
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