Linux-2.6.12-rc2
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!
This commit is contained in:
Linus Torvalds
247
arch/m32r/mm/init.c
Normal file
247
arch/m32r/mm/init.c
Normal file
@@ -0,0 +1,247 @@
|
||||
/*
|
||||
* linux/arch/m32r/mm/init.c
|
||||
*
|
||||
* Copyright (c) 2001, 2002 Hitoshi Yamamoto
|
||||
*
|
||||
* Some code taken from sh version.
|
||||
* Copyright (C) 1999 Niibe Yutaka
|
||||
* Based on linux/arch/i386/mm/init.c:
|
||||
* Copyright (C) 1995 Linus Torvalds
|
||||
*/
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/pagemap.h>
|
||||
#include <linux/bootmem.h>
|
||||
#include <linux/swap.h>
|
||||
#include <linux/highmem.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/nodemask.h>
|
||||
#include <asm/types.h>
|
||||
#include <asm/processor.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/pgtable.h>
|
||||
#include <asm/pgalloc.h>
|
||||
#include <asm/mmu_context.h>
|
||||
#include <asm/setup.h>
|
||||
#include <asm/tlb.h>
|
||||
|
||||
/* References to section boundaries */
|
||||
extern char _text, _etext, _edata;
|
||||
extern char __init_begin, __init_end;
|
||||
|
||||
pgd_t swapper_pg_dir[1024];
|
||||
|
||||
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
|
||||
|
||||
void show_mem(void)
|
||||
{
|
||||
int total = 0, reserved = 0;
|
||||
int shared = 0, cached = 0;
|
||||
int highmem = 0;
|
||||
struct page *page;
|
||||
pg_data_t *pgdat;
|
||||
unsigned long i;
|
||||
|
||||
printk("Mem-info:\n");
|
||||
show_free_areas();
|
||||
printk("Free swap: %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
|
||||
for_each_pgdat(pgdat) {
|
||||
for (i = 0; i < pgdat->node_spanned_pages; ++i) {
|
||||
page = pgdat->node_mem_map + i;
|
||||
total++;
|
||||
if (PageHighMem(page))
|
||||
highmem++;
|
||||
if (PageReserved(page))
|
||||
reserved++;
|
||||
else if (PageSwapCache(page))
|
||||
cached++;
|
||||
else if (page_count(page))
|
||||
shared += page_count(page) - 1;
|
||||
}
|
||||
}
|
||||
printk("%d pages of RAM\n", total);
|
||||
printk("%d pages of HIGHMEM\n",highmem);
|
||||
printk("%d reserved pages\n",reserved);
|
||||
printk("%d pages shared\n",shared);
|
||||
printk("%d pages swap cached\n",cached);
|
||||
}
|
||||
|
||||
/*
|
||||
* Cache of MMU context last used.
|
||||
*/
|
||||
#ifndef CONFIG_SMP
|
||||
unsigned long mmu_context_cache_dat;
|
||||
#else
|
||||
unsigned long mmu_context_cache_dat[NR_CPUS];
|
||||
#endif
|
||||
static unsigned long hole_pages;
|
||||
|
||||
/*
|
||||
* function prototype
|
||||
*/
|
||||
void __init paging_init(void);
|
||||
void __init mem_init(void);
|
||||
void free_initmem(void);
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
void free_initrd_mem(unsigned long, unsigned long);
|
||||
#endif
|
||||
|
||||
/* It'd be good if these lines were in the standard header file. */
|
||||
#define START_PFN(nid) \
|
||||
(NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
|
||||
#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
|
||||
|
||||
#ifndef CONFIG_DISCONTIGMEM
|
||||
unsigned long __init zone_sizes_init(void)
|
||||
{
|
||||
unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
|
||||
unsigned long max_dma;
|
||||
unsigned long low;
|
||||
unsigned long start_pfn;
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
start_pfn = START_PFN(0);
|
||||
max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
|
||||
low = MAX_LOW_PFN(0);
|
||||
|
||||
if (low < max_dma){
|
||||
zones_size[ZONE_DMA] = low - start_pfn;
|
||||
zones_size[ZONE_NORMAL] = 0;
|
||||
} else {
|
||||
zones_size[ZONE_DMA] = low - start_pfn;
|
||||
zones_size[ZONE_NORMAL] = low - max_dma;
|
||||
}
|
||||
#else
|
||||
zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
|
||||
zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
|
||||
start_pfn = __MEMORY_START >> PAGE_SHIFT;
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
free_area_init_node(0, NODE_DATA(0), zones_size, start_pfn, 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else /* CONFIG_DISCONTIGMEM */
|
||||
extern unsigned long zone_sizes_init(void);
|
||||
#endif /* CONFIG_DISCONTIGMEM */
|
||||
|
||||
/*======================================================================*
|
||||
* paging_init() : sets up the page tables
|
||||
*======================================================================*/
|
||||
void __init paging_init(void)
|
||||
{
|
||||
#ifdef CONFIG_MMU
|
||||
int i;
|
||||
pgd_t *pg_dir;
|
||||
|
||||
/* We don't need kernel mapping as hardware support that. */
|
||||
pg_dir = swapper_pg_dir;
|
||||
|
||||
for (i = 0 ; i < USER_PTRS_PER_PGD * 2 ; i++)
|
||||
pgd_val(pg_dir[i]) = 0;
|
||||
#endif /* CONFIG_MMU */
|
||||
hole_pages = zone_sizes_init();
|
||||
}
|
||||
|
||||
int __init reservedpages_count(void)
|
||||
{
|
||||
int reservedpages, nid, i;
|
||||
|
||||
reservedpages = 0;
|
||||
for_each_online_node(nid)
|
||||
for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
|
||||
if (PageReserved(NODE_DATA(nid)->node_mem_map + i))
|
||||
reservedpages++;
|
||||
|
||||
return reservedpages;
|
||||
}
|
||||
|
||||
/*======================================================================*
|
||||
* mem_init() :
|
||||
* orig : arch/sh/mm/init.c
|
||||
*======================================================================*/
|
||||
void __init mem_init(void)
|
||||
{
|
||||
int codesize, reservedpages, datasize, initsize;
|
||||
int nid;
|
||||
#ifndef CONFIG_MMU
|
||||
extern unsigned long memory_end;
|
||||
#endif
|
||||
|
||||
num_physpages = 0;
|
||||
for_each_online_node(nid)
|
||||
num_physpages += MAX_LOW_PFN(nid) - START_PFN(nid) + 1;
|
||||
|
||||
num_physpages -= hole_pages;
|
||||
|
||||
#ifndef CONFIG_DISCONTIGMEM
|
||||
max_mapnr = num_physpages;
|
||||
#endif /* CONFIG_DISCONTIGMEM */
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
|
||||
#else
|
||||
high_memory = (void *)(memory_end & PAGE_MASK);
|
||||
#endif /* CONFIG_MMU */
|
||||
|
||||
/* clear the zero-page */
|
||||
memset(empty_zero_page, 0, PAGE_SIZE);
|
||||
|
||||
/* this will put all low memory onto the freelists */
|
||||
for_each_online_node(nid)
|
||||
totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
|
||||
|
||||
reservedpages = reservedpages_count() - hole_pages;
|
||||
codesize = (unsigned long) &_etext - (unsigned long)&_text;
|
||||
datasize = (unsigned long) &_edata - (unsigned long)&_etext;
|
||||
initsize = (unsigned long) &__init_end - (unsigned long)&__init_begin;
|
||||
|
||||
printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
|
||||
"%dk reserved, %dk data, %dk init)\n",
|
||||
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
|
||||
num_physpages << (PAGE_SHIFT-10),
|
||||
codesize >> 10,
|
||||
reservedpages << (PAGE_SHIFT-10),
|
||||
datasize >> 10,
|
||||
initsize >> 10);
|
||||
}
|
||||
|
||||
/*======================================================================*
|
||||
* free_initmem() :
|
||||
* orig : arch/sh/mm/init.c
|
||||
*======================================================================*/
|
||||
void free_initmem(void)
|
||||
{
|
||||
unsigned long addr;
|
||||
|
||||
addr = (unsigned long)(&__init_begin);
|
||||
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
|
||||
ClearPageReserved(virt_to_page(addr));
|
||||
set_page_count(virt_to_page(addr), 1);
|
||||
free_page(addr);
|
||||
totalram_pages++;
|
||||
}
|
||||
printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", \
|
||||
(int)(&__init_end - &__init_begin) >> 10);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_BLK_DEV_INITRD
|
||||
/*======================================================================*
|
||||
* free_initrd_mem() :
|
||||
* orig : arch/sh/mm/init.c
|
||||
*======================================================================*/
|
||||
void free_initrd_mem(unsigned long start, unsigned long end)
|
||||
{
|
||||
unsigned long p;
|
||||
for (p = start; p < end; p += PAGE_SIZE) {
|
||||
ClearPageReserved(virt_to_page(p));
|
||||
set_page_count(virt_to_page(p), 1);
|
||||
free_page(p);
|
||||
totalram_pages++;
|
||||
}
|
||||
printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
|
||||
}
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user