| /* |
| * 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 |
| * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk). |
| * |
| * 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)); |
| } |
| |
| #ifdef CONFIG_PPC_64K_PAGES |
| static const unsigned int pgtable_cache_size[3] = { |
| PTE_TABLE_SIZE, PMD_TABLE_SIZE, PGD_TABLE_SIZE |
| }; |
| static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = { |
| "pte_pmd_cache", "pmd_cache", "pgd_cache", |
| }; |
| #else |
| static const unsigned int pgtable_cache_size[2] = { |
| PTE_TABLE_SIZE, PMD_TABLE_SIZE |
| }; |
| static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = { |
| "pgd_pte_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, |
| NULL); |
| } |
| } |