mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-25 19:07:46 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
|
|
* 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/config.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/bootmem.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/system.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/io.h>
|
|
#ifdef CONFIG_ATARI
|
|
#include <asm/atari_stram.h>
|
|
#endif
|
|
#include <asm/tlb.h>
|
|
|
|
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
|
|
|
|
/*
|
|
* ZERO_PAGE is a special page that is used for zero-initialized
|
|
* data and COW.
|
|
*/
|
|
|
|
void *empty_zero_page;
|
|
|
|
void show_mem(void)
|
|
{
|
|
unsigned long i;
|
|
int free = 0, total = 0, reserved = 0, shared = 0;
|
|
int cached = 0;
|
|
|
|
printk("\nMem-info:\n");
|
|
show_free_areas();
|
|
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
|
|
i = max_mapnr;
|
|
while (i-- > 0) {
|
|
total++;
|
|
if (PageReserved(mem_map+i))
|
|
reserved++;
|
|
else if (PageSwapCache(mem_map+i))
|
|
cached++;
|
|
else if (!page_count(mem_map+i))
|
|
free++;
|
|
else
|
|
shared += page_count(mem_map+i) - 1;
|
|
}
|
|
printk("%d pages of RAM\n",total);
|
|
printk("%d free pages\n",free);
|
|
printk("%d reserved pages\n",reserved);
|
|
printk("%d pages shared\n",shared);
|
|
printk("%d pages swap cached\n",cached);
|
|
}
|
|
|
|
extern void init_pointer_table(unsigned long ptable);
|
|
|
|
/* References to section boundaries */
|
|
|
|
extern char _text, _etext, _edata, __bss_start, _end;
|
|
extern char __init_begin, __init_end;
|
|
|
|
extern pmd_t *zero_pgtable;
|
|
|
|
void __init mem_init(void)
|
|
{
|
|
int codepages = 0;
|
|
int datapages = 0;
|
|
int initpages = 0;
|
|
unsigned long tmp;
|
|
#ifndef CONFIG_SUN3
|
|
int i;
|
|
#endif
|
|
|
|
max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT);
|
|
|
|
#ifdef CONFIG_ATARI
|
|
if (MACH_IS_ATARI)
|
|
atari_stram_mem_init_hook();
|
|
#endif
|
|
|
|
/* this will put all memory onto the freelists */
|
|
totalram_pages = free_all_bootmem();
|
|
|
|
for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) {
|
|
if (PageReserved(virt_to_page(tmp))) {
|
|
if (tmp >= (unsigned long)&_text
|
|
&& tmp < (unsigned long)&_etext)
|
|
codepages++;
|
|
else if (tmp >= (unsigned long) &__init_begin
|
|
&& tmp < (unsigned long) &__init_end)
|
|
initpages++;
|
|
else
|
|
datapages++;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
#ifndef CONFIG_SUN3
|
|
/* insert pointer tables allocated so far into the tablelist */
|
|
init_pointer_table((unsigned long)kernel_pg_dir);
|
|
for (i = 0; i < PTRS_PER_PGD; i++) {
|
|
if (pgd_present(kernel_pg_dir[i]))
|
|
init_pointer_table(__pgd_page(kernel_pg_dir[i]));
|
|
}
|
|
|
|
/* insert also pointer table that we used to unmap the zero page */
|
|
if (zero_pgtable)
|
|
init_pointer_table((unsigned long)zero_pgtable);
|
|
#endif
|
|
|
|
printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
|
|
(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
|
|
max_mapnr << (PAGE_SHIFT-10),
|
|
codepages << (PAGE_SHIFT-10),
|
|
datapages << (PAGE_SHIFT-10),
|
|
initpages << (PAGE_SHIFT-10));
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
int pages = 0;
|
|
for (; start < end; start += PAGE_SIZE) {
|
|
ClearPageReserved(virt_to_page(start));
|
|
set_page_count(virt_to_page(start), 1);
|
|
free_page(start);
|
|
totalram_pages++;
|
|
pages++;
|
|
}
|
|
printk ("Freeing initrd memory: %dk freed\n", pages);
|
|
}
|
|
#endif
|