ce7549e1d8
Prepare for killing free_all_bootmem_node() by using free_all_bootmem() instead. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/init.h>
|
|
#include <linux/mmzone.h>
|
|
#include <linux/module.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/nodemask.h>
|
|
|
|
#include <asm/page.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/tlb.h>
|
|
#include <asm/io.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/sections.h>
|
|
|
|
pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_data;
|
|
|
|
struct page *empty_zero_page;
|
|
EXPORT_SYMBOL(empty_zero_page);
|
|
|
|
/*
|
|
* Cache of MMU context last used.
|
|
*/
|
|
unsigned long mmu_context_cache = NO_CONTEXT;
|
|
|
|
/*
|
|
* paging_init() sets up the page tables
|
|
*
|
|
* This routine also unmaps the page at virtual kernel address 0, so
|
|
* that we can trap those pesky NULL-reference errors in the kernel.
|
|
*/
|
|
void __init paging_init(void)
|
|
{
|
|
extern unsigned long _evba;
|
|
void *zero_page;
|
|
int nid;
|
|
|
|
/*
|
|
* Make sure we can handle exceptions before enabling
|
|
* paging. Not that we should ever _get_ any exceptions this
|
|
* early, but you never know...
|
|
*/
|
|
printk("Exception vectors start at %p\n", &_evba);
|
|
sysreg_write(EVBA, (unsigned long)&_evba);
|
|
|
|
/*
|
|
* Since we are ready to handle exceptions now, we should let
|
|
* the CPU generate them...
|
|
*/
|
|
__asm__ __volatile__ ("csrf %0" : : "i"(SR_EM_BIT));
|
|
|
|
/*
|
|
* Allocate the zero page. The allocator will panic if it
|
|
* can't satisfy the request, so no need to check.
|
|
*/
|
|
zero_page = alloc_bootmem_low_pages_node(NODE_DATA(0),
|
|
PAGE_SIZE);
|
|
|
|
sysreg_write(PTBR, (unsigned long)swapper_pg_dir);
|
|
enable_mmu();
|
|
printk ("CPU: Paging enabled\n");
|
|
|
|
for_each_online_node(nid) {
|
|
pg_data_t *pgdat = NODE_DATA(nid);
|
|
unsigned long zones_size[MAX_NR_ZONES];
|
|
unsigned long low, start_pfn;
|
|
|
|
start_pfn = pgdat->bdata->node_min_pfn;
|
|
low = pgdat->bdata->node_low_pfn;
|
|
|
|
memset(zones_size, 0, sizeof(zones_size));
|
|
zones_size[ZONE_NORMAL] = low - start_pfn;
|
|
|
|
printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n",
|
|
nid, start_pfn, low);
|
|
|
|
free_area_init_node(nid, zones_size, start_pfn, NULL);
|
|
|
|
printk("Node %u: mem_map starts at %p\n",
|
|
pgdat->node_id, pgdat->node_mem_map);
|
|
}
|
|
|
|
mem_map = NODE_DATA(0)->node_mem_map;
|
|
|
|
empty_zero_page = virt_to_page(zero_page);
|
|
flush_dcache_page(empty_zero_page);
|
|
}
|
|
|
|
void __init mem_init(void)
|
|
{
|
|
pg_data_t *pgdat;
|
|
|
|
high_memory = NULL;
|
|
for_each_online_pgdat(pgdat)
|
|
high_memory = max_t(void *, high_memory,
|
|
__va(pgdat_end_pfn(pgdat) << PAGE_SHIFT));
|
|
|
|
set_max_mapnr(MAP_NR(high_memory));
|
|
free_all_bootmem();
|
|
mem_init_print_info(NULL);
|
|
}
|
|
|
|
void free_initmem(void)
|
|
{
|
|
free_initmem_default(-1);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
free_reserved_area((void *)start, (void *)end, -1, "initrd");
|
|
}
|
|
#endif
|