You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
183 lines
4.6 KiB
183 lines
4.6 KiB
/*
|
|
* PowerPC version
|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
|
*
|
|
* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
|
|
* and Cort Dougan (PReP) (cort@cs.nmt.edu)
|
|
* Copyright (C) 1996 Paul Mackerras
|
|
*
|
|
* Derived from "arch/i386/mm/init.c"
|
|
* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
|
|
*
|
|
* Dave Engebretsen <engebret@us.ibm.com>
|
|
* Rework for PPC64 port.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#undef DEBUG
|
|
|
|
#include <linux/signal.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/stddef.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/bootmem.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/idr.h>
|
|
#include <linux/nodemask.h>
|
|
#include <linux/module.h>
|
|
#include <linux/poison.h>
|
|
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/page.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/lmb.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/mmu.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/tlb.h>
|
|
#include <asm/eeh.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/mmzone.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/system.h>
|
|
#include <asm/iommu.h>
|
|
#include <asm/abs_addr.h>
|
|
#include <asm/vdso.h>
|
|
|
|
#include "mmu_decl.h"
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) printk(fmt)
|
|
#else
|
|
#define DBG(fmt...)
|
|
#endif
|
|
|
|
#if PGTABLE_RANGE > USER_VSID_RANGE
|
|
#warning Limited user VSID range means pagetable space is wasted
|
|
#endif
|
|
|
|
#if (TASK_SIZE_USER64 < PGTABLE_RANGE) && (TASK_SIZE_USER64 < USER_VSID_RANGE)
|
|
#warning TASK_SIZE is smaller than it needs to be.
|
|
#endif
|
|
|
|
/* max amount of RAM to use */
|
|
unsigned long __max_memory;
|
|
|
|
void free_initmem(void)
|
|
{
|
|
unsigned long addr;
|
|
|
|
addr = (unsigned long)__init_begin;
|
|
for (; addr < (unsigned long)__init_end; addr += PAGE_SIZE) {
|
|
memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
|
|
ClearPageReserved(virt_to_page(addr));
|
|
init_page_count(virt_to_page(addr));
|
|
free_page(addr);
|
|
totalram_pages++;
|
|
}
|
|
printk ("Freeing unused kernel memory: %luk freed\n",
|
|
((unsigned long)__init_end - (unsigned long)__init_begin) >> 10);
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
void free_initrd_mem(unsigned long start, unsigned long end)
|
|
{
|
|
if (start < end)
|
|
printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
|
|
for (; start < end; start += PAGE_SIZE) {
|
|
ClearPageReserved(virt_to_page(start));
|
|
init_page_count(virt_to_page(start));
|
|
free_page(start);
|
|
totalram_pages++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static struct kcore_list kcore_vmem;
|
|
|
|
static int __init setup_kcore(void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i < lmb.memory.cnt; i++) {
|
|
unsigned long base, size;
|
|
struct kcore_list *kcore_mem;
|
|
|
|
base = lmb.memory.region[i].base;
|
|
size = lmb.memory.region[i].size;
|
|
|
|
/* GFP_ATOMIC to avoid might_sleep warnings during boot */
|
|
kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
|
|
if (!kcore_mem)
|
|
panic("%s: kmalloc failed\n", __FUNCTION__);
|
|
|
|
kclist_add(kcore_mem, __va(base), size);
|
|
}
|
|
|
|
kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
|
|
|
|
return 0;
|
|
}
|
|
module_init(setup_kcore);
|
|
|
|
static void zero_ctor(void *addr, struct kmem_cache *cache, unsigned long flags)
|
|
{
|
|
memset(addr, 0, kmem_cache_size(cache));
|
|
}
|
|
|
|
static const unsigned int pgtable_cache_size[2] = {
|
|
PGD_TABLE_SIZE, PMD_TABLE_SIZE
|
|
};
|
|
static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = {
|
|
#ifdef CONFIG_PPC_64K_PAGES
|
|
"pgd_cache", "pmd_cache",
|
|
#else
|
|
"pgd_cache", "pud_pmd_cache",
|
|
#endif /* CONFIG_PPC_64K_PAGES */
|
|
};
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
/* Hugepages need one extra cache, initialized in hugetlbpage.c. We
|
|
* can't put into the tables above, because HPAGE_SHIFT is not compile
|
|
* time constant. */
|
|
struct kmem_cache *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)+1];
|
|
#else
|
|
struct kmem_cache *pgtable_cache[ARRAY_SIZE(pgtable_cache_size)];
|
|
#endif
|
|
|
|
void pgtable_cache_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(pgtable_cache_size); i++) {
|
|
int size = pgtable_cache_size[i];
|
|
const char *name = pgtable_cache_name[i];
|
|
|
|
DBG("Allocating page table cache %s (#%d) "
|
|
"for size: %08x...\n", name, i, size);
|
|
pgtable_cache[i] = kmem_cache_create(name,
|
|
size, size,
|
|
SLAB_PANIC,
|
|
zero_ctor);
|
|
}
|
|
}
|
|
|