ia64/xen-unstable

changeset 9691:4ed269e73e95

[IA64] cleanup CONFIG_VIRTUAL_MEM_MAP.

Signed-off-by: Kouya Shimura <kouya@jp.fujitsu.com>
author awilliam@xenbuild.aw
date Mon Apr 17 08:47:36 2006 -0600 (2006-04-17)
parents bdb08c9ef3d1
children 41823e46d6ac
files xen/arch/ia64/xen/mm_init.c xen/include/asm-ia64/mm.h
line diff
     1.1 --- a/xen/arch/ia64/xen/mm_init.c	Mon Apr 17 08:46:52 2006 -0600
     1.2 +++ b/xen/arch/ia64/xen/mm_init.c	Mon Apr 17 08:47:36 2006 -0600
     1.3 @@ -8,287 +8,11 @@
     1.4  #include <linux/kernel.h>
     1.5  #include <linux/init.h>
     1.6  
     1.7 -#ifdef XEN
     1.8  #include <xen/sched.h>
     1.9 -#endif
    1.10 -#include <linux/bootmem.h>
    1.11 -#include <linux/efi.h>
    1.12 -#include <linux/elf.h>
    1.13 -#include <linux/mm.h>
    1.14 -#include <linux/mmzone.h>
    1.15 -#include <linux/module.h>
    1.16 -#ifndef XEN
    1.17 -#include <linux/personality.h>
    1.18 -#endif
    1.19 -#include <linux/reboot.h>
    1.20 -#include <linux/slab.h>
    1.21 -#include <linux/swap.h>
    1.22 -#ifndef XEN
    1.23 -#include <linux/proc_fs.h>
    1.24 -#endif
    1.25 -
    1.26 -#ifndef XEN
    1.27 -#include <asm/a.out.h>
    1.28 -#endif
    1.29 -#include <asm/bitops.h>
    1.30 -#include <asm/dma.h>
    1.31 -#ifndef XEN
    1.32 -#include <asm/ia32.h>
    1.33 -#endif
    1.34 -#include <asm/io.h>
    1.35 -#include <asm/machvec.h>
    1.36 -#include <asm/numa.h>
    1.37 -#include <asm/patch.h>
    1.38 -#include <asm/pgalloc.h>
    1.39 -#include <asm/sal.h>
    1.40 -#include <asm/sections.h>
    1.41 -#include <asm/system.h>
    1.42 -#include <asm/tlb.h>
    1.43 -#include <asm/uaccess.h>
    1.44 -#include <asm/unistd.h>
    1.45 -#include <asm/mca.h>
    1.46  #include <asm/vhpt.h>
    1.47  
    1.48 -#ifndef XEN
    1.49 -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
    1.50 -#endif
    1.51 -
    1.52  extern void ia64_tlb_init (void);
    1.53  
    1.54 -unsigned long MAX_DMA_ADDRESS = PAGE_OFFSET + 0x100000000UL;
    1.55 -
    1.56 -#ifdef CONFIG_VIRTUAL_MEM_MAP
    1.57 -unsigned long vmalloc_end = VMALLOC_END_INIT;
    1.58 -EXPORT_SYMBOL(vmalloc_end);
    1.59 -struct page_info *vmem_map;
    1.60 -EXPORT_SYMBOL(vmem_map);
    1.61 -#endif
    1.62 -
    1.63 -// static int pgt_cache_water[2] = { 25, 50 };
    1.64 -
    1.65 -#ifndef XEN
    1.66 -struct page_info *zero_page_memmap_ptr;	/* map entry for zero page */
    1.67 -EXPORT_SYMBOL(zero_page_memmap_ptr);
    1.68 -
    1.69 -void *high_memory;
    1.70 -EXPORT_SYMBOL(high_memory);
    1.71 -
    1.72 -/////////////////////////////////////////////
    1.73 -// following from linux-2.6.7/mm/mmap.c
    1.74 -/* description of effects of mapping type and prot in current implementation.
    1.75 - * this is due to the limited x86 page protection hardware.  The expected
    1.76 - * behavior is in parens:
    1.77 - *
    1.78 - * map_type	prot
    1.79 - *		PROT_NONE	PROT_READ	PROT_WRITE	PROT_EXEC
    1.80 - * MAP_SHARED	r: (no) no	r: (yes) yes	r: (no) yes	r: (no) yes
    1.81 - *		w: (no) no	w: (no) no	w: (yes) yes	w: (no) no
    1.82 - *		x: (no) no	x: (no) yes	x: (no) yes	x: (yes) yes
    1.83 - *		
    1.84 - * MAP_PRIVATE	r: (no) no	r: (yes) yes	r: (no) yes	r: (no) yes
    1.85 - *		w: (no) no	w: (no) no	w: (copy) copy	w: (no) no
    1.86 - *		x: (no) no	x: (no) yes	x: (no) yes	x: (yes) yes
    1.87 - *
    1.88 - */
    1.89 -pgprot_t protection_map[16] = {
    1.90 -	__P000, __P001, __P010, __P011, __P100, __P101, __P110, __P111,
    1.91 -	__S000, __S001, __S010, __S011, __S100, __S101, __S110, __S111
    1.92 -};
    1.93 -
    1.94 -void insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
    1.95 -{
    1.96 -	printf("insert_vm_struct: called, not implemented yet\n");
    1.97 -}
    1.98 -
    1.99 -/////////////////////////////////////////////
   1.100 -//following from linux/mm/memory.c
   1.101 -
   1.102 -#ifndef __ARCH_HAS_4LEVEL_HACK
   1.103 -/*
   1.104 - * Allocate page upper directory.
   1.105 - *
   1.106 - * We've already handled the fast-path in-line, and we own the
   1.107 - * page table lock.
   1.108 - *
   1.109 - * On a two-level or three-level page table, this ends up actually being
   1.110 - * entirely optimized away.
   1.111 - */
   1.112 -pud_t fastcall *__pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address)
   1.113 -{
   1.114 -	pud_t *new;
   1.115 -
   1.116 -	spin_unlock(&mm->page_table_lock);
   1.117 -	new = pud_alloc_one(mm, address);
   1.118 -	spin_lock(&mm->page_table_lock);
   1.119 -	if (!new)
   1.120 -		return NULL;
   1.121 -
   1.122 -	/*
   1.123 -	 * Because we dropped the lock, we should re-check the
   1.124 -	 * entry, as somebody else could have populated it..
   1.125 -	 */
   1.126 -	if (pgd_present(*pgd)) {
   1.127 -		pud_free(new);
   1.128 -		goto out;
   1.129 -	}
   1.130 -	pgd_populate(mm, pgd, new);
   1.131 - out:
   1.132 -	return pud_offset(pgd, address);
   1.133 -}
   1.134 -
   1.135 -/*
   1.136 - * Allocate page middle directory.
   1.137 - *
   1.138 - * We've already handled the fast-path in-line, and we own the
   1.139 - * page table lock.
   1.140 - *
   1.141 - * On a two-level page table, this ends up actually being entirely
   1.142 - * optimized away.
   1.143 - */
   1.144 -pmd_t fastcall *__pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address)
   1.145 -{
   1.146 -	pmd_t *new;
   1.147 -
   1.148 -	spin_unlock(&mm->page_table_lock);
   1.149 -	new = pmd_alloc_one(mm, address);
   1.150 -	spin_lock(&mm->page_table_lock);
   1.151 -	if (!new)
   1.152 -		return NULL;
   1.153 -
   1.154 -	/*
   1.155 -	 * Because we dropped the lock, we should re-check the
   1.156 -	 * entry, as somebody else could have populated it..
   1.157 -	 */
   1.158 -	if (pud_present(*pud)) {
   1.159 -		pmd_free(new);
   1.160 -		goto out;
   1.161 -	}
   1.162 -	pud_populate(mm, pud, new);
   1.163 - out:
   1.164 -	return pmd_offset(pud, address);
   1.165 -}
   1.166 -#endif
   1.167 -
   1.168 -pte_t fastcall * pte_alloc_map(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
   1.169 -{
   1.170 -	if (!pmd_present(*pmd)) {
   1.171 -		struct page_info *new;
   1.172 -
   1.173 -		spin_unlock(&mm->page_table_lock);
   1.174 -		new = pte_alloc_one(mm, address);
   1.175 -		spin_lock(&mm->page_table_lock);
   1.176 -		if (!new)
   1.177 -			return NULL;
   1.178 -
   1.179 -		/*
   1.180 -		 * Because we dropped the lock, we should re-check the
   1.181 -		 * entry, as somebody else could have populated it..
   1.182 -		 */
   1.183 -		if (pmd_present(*pmd)) {
   1.184 -			pte_free(new);
   1.185 -			goto out;
   1.186 -		}
   1.187 -		inc_page_state(nr_page_table_pages);
   1.188 -		pmd_populate(mm, pmd, new);
   1.189 -	}
   1.190 -out:
   1.191 -	return pte_offset_map(pmd, address);
   1.192 -}
   1.193 -/////////////////////////////////////////////
   1.194 -#endif /* XEN */
   1.195 -
   1.196 -#if 0
   1.197 -void
   1.198 -update_mmu_cache (struct vm_area_struct *vma, unsigned long vaddr, pte_t pte)
   1.199 -{
   1.200 -	unsigned long addr;
   1.201 -	struct page_info *page;
   1.202 -
   1.203 -	if (!pte_exec(pte))
   1.204 -		return;				/* not an executable page... */
   1.205 -
   1.206 -	page = pte_page(pte);
   1.207 -	/* don't use VADDR: it may not be mapped on this CPU (or may have just been flushed): */
   1.208 -	addr = (unsigned long) page_address(page);
   1.209 -
   1.210 -	if (test_bit(PG_arch_1, &page->flags))
   1.211 -		return;				/* i-cache is already coherent with d-cache */
   1.212 -
   1.213 -	flush_icache_range(addr, addr + PAGE_SIZE);
   1.214 -	set_bit(PG_arch_1, &page->flags);	/* mark page as clean */
   1.215 -}
   1.216 -#endif
   1.217 -
   1.218 -#if 0
   1.219 -inline void
   1.220 -ia64_set_rbs_bot (void)
   1.221 -{
   1.222 -#ifdef XEN
   1.223 -	unsigned long stack_size = MAX_USER_STACK_SIZE;
   1.224 -#else
   1.225 -	unsigned long stack_size = current->rlim[RLIMIT_STACK].rlim_max & -16;
   1.226 -#endif
   1.227 -
   1.228 -	if (stack_size > MAX_USER_STACK_SIZE)
   1.229 -		stack_size = MAX_USER_STACK_SIZE;
   1.230 -	current->arch._thread.rbs_bot = STACK_TOP - stack_size;
   1.231 -}
   1.232 -#endif
   1.233 -
   1.234 -/*
   1.235 - * This performs some platform-dependent address space initialization.
   1.236 - * On IA-64, we want to setup the VM area for the register backing
   1.237 - * store (which grows upwards) and install the gateway page which is
   1.238 - * used for signal trampolines, etc.
   1.239 - */
   1.240 -#if 0
   1.241 -void
   1.242 -ia64_init_addr_space (void)
   1.243 -{
   1.244 -#ifdef XEN
   1.245 -printf("ia64_init_addr_space: called, not implemented\n");
   1.246 -#else
   1.247 -	struct vm_area_struct *vma;
   1.248 -
   1.249 -	ia64_set_rbs_bot();
   1.250 -
   1.251 -	/*
   1.252 -	 * If we're out of memory and kmem_cache_alloc() returns NULL, we simply ignore
   1.253 -	 * the problem.  When the process attempts to write to the register backing store
   1.254 -	 * for the first time, it will get a SEGFAULT in this case.
   1.255 -	 */
   1.256 -	vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
   1.257 -	if (vma) {
   1.258 -		memset(vma, 0, sizeof(*vma));
   1.259 -		vma->vm_mm = current->mm;
   1.260 -		vma->vm_start = current->arch._thread.rbs_bot & PAGE_MASK;
   1.261 -		vma->vm_end = vma->vm_start + PAGE_SIZE;
   1.262 -		vma->vm_page_prot = protection_map[VM_DATA_DEFAULT_FLAGS & 0x7];
   1.263 -		vma->vm_flags = VM_READ|VM_WRITE|VM_MAYREAD|VM_MAYWRITE|VM_GROWSUP;
   1.264 -		insert_vm_struct(current->mm, vma);
   1.265 -	}
   1.266 -
   1.267 -	/* map NaT-page at address zero to speed up speculative dereferencing of NULL: */
   1.268 -	if (!(current->personality & MMAP_PAGE_ZERO)) {
   1.269 -		vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
   1.270 -		if (vma) {
   1.271 -			memset(vma, 0, sizeof(*vma));
   1.272 -			vma->vm_mm = current->mm;
   1.273 -			vma->vm_end = PAGE_SIZE;
   1.274 -			vma->vm_page_prot = __pgprot(pgprot_val(PAGE_READONLY) | _PAGE_MA_NAT);
   1.275 -			vma->vm_flags = VM_READ | VM_MAYREAD | VM_IO | VM_RESERVED;
   1.276 -			insert_vm_struct(current->mm, vma);
   1.277 -		}
   1.278 -	}
   1.279 -#endif
   1.280 -}
   1.281 -#endif
   1.282 -
   1.283 -void setup_gate (void)
   1.284 -{
   1.285 -	printk("setup_gate not-implemented.\n");
   1.286 -}
   1.287 -
   1.288  void __devinit
   1.289  ia64_mmu_init (void *my_cpu_data)
   1.290  {
   1.291 @@ -384,166 +108,6 @@ ia64_mmu_init (void *my_cpu_data)
   1.292  #endif
   1.293  }
   1.294  
   1.295 -#ifdef CONFIG_VIRTUAL_MEM_MAP
   1.296 -
   1.297 -int
   1.298 -create_mem_map_page_table (u64 start, u64 end, void *arg)
   1.299 -{
   1.300 -	unsigned long address, start_page, end_page;
   1.301 -	struct page_info *map_start, *map_end;
   1.302 -	int node;
   1.303 -	pgd_t *pgd;
   1.304 -	pmd_t *pmd;
   1.305 -	pte_t *pte;
   1.306 -
   1.307 -	map_start = vmem_map + (__pa(start) >> PAGE_SHIFT);
   1.308 -	map_end   = vmem_map + (__pa(end) >> PAGE_SHIFT);
   1.309 -
   1.310 -	start_page = (unsigned long) map_start & PAGE_MASK;
   1.311 -	end_page = PAGE_ALIGN((unsigned long) map_end);
   1.312 -	node = paddr_to_nid(__pa(start));
   1.313 -
   1.314 -	for (address = start_page; address < end_page; address += PAGE_SIZE) {
   1.315 -		pgd = pgd_offset_k(address);
   1.316 -		if (pgd_none(*pgd))
   1.317 -			pgd_populate(&init_mm, pgd, alloc_bootmem_pages_node(NODE_DATA(node), PAGE_SIZE));
   1.318 -		pmd = pmd_offset(pgd, address);
   1.319 -
   1.320 -		if (pmd_none(*pmd))
   1.321 -			pmd_populate_kernel(&init_mm, pmd, alloc_bootmem_pages_node(NODE_DATA(node), PAGE_SIZE));
   1.322 -		pte = pte_offset_kernel(pmd, address);
   1.323 -
   1.324 -		if (pte_none(*pte))
   1.325 -			set_pte(pte, pfn_pte(__pa(alloc_bootmem_pages_node(NODE_DATA(node), PAGE_SIZE)) >> PAGE_SHIFT,
   1.326 -					     PAGE_KERNEL));
   1.327 -	}
   1.328 -	return 0;
   1.329 -}
   1.330 -
   1.331 -struct memmap_init_callback_data {
   1.332 -	struct page_info *start;
   1.333 -	struct page_info *end;
   1.334 -	int nid;
   1.335 -	unsigned long zone;
   1.336 -};
   1.337 -
   1.338 -static int
   1.339 -virtual_memmap_init (u64 start, u64 end, void *arg)
   1.340 -{
   1.341 -	struct memmap_init_callback_data *args;
   1.342 -	struct page_info *map_start, *map_end;
   1.343 -
   1.344 -	args = (struct memmap_init_callback_data *) arg;
   1.345 -
   1.346 -	map_start = vmem_map + (__pa(start) >> PAGE_SHIFT);
   1.347 -	map_end   = vmem_map + (__pa(end) >> PAGE_SHIFT);
   1.348 -
   1.349 -	if (map_start < args->start)
   1.350 -		map_start = args->start;
   1.351 -	if (map_end > args->end)
   1.352 -		map_end = args->end;
   1.353 -
   1.354 -	/*
   1.355 -	 * We have to initialize "out of bounds" struct page_info elements that fit completely
   1.356 -	 * on the same pages that were allocated for the "in bounds" elements because they
   1.357 -	 * may be referenced later (and found to be "reserved").
   1.358 -	 */
   1.359 -	map_start -= ((unsigned long) map_start & (PAGE_SIZE - 1)) / sizeof(struct page_info);
   1.360 -	map_end += ((PAGE_ALIGN((unsigned long) map_end) - (unsigned long) map_end)
   1.361 -		    / sizeof(struct page_info));
   1.362 -
   1.363 -	if (map_start < map_end)
   1.364 -		memmap_init_zone(map_start, (unsigned long) (map_end - map_start),
   1.365 -				 args->nid, args->zone, page_to_mfn(map_start));
   1.366 -	return 0;
   1.367 -}
   1.368 -
   1.369 -void
   1.370 -memmap_init (struct page_info *start, unsigned long size, int nid,
   1.371 -	     unsigned long zone, unsigned long start_pfn)
   1.372 -{
   1.373 -	if (!vmem_map)
   1.374 -		memmap_init_zone(start, size, nid, zone, start_pfn);
   1.375 -	else {
   1.376 -		struct memmap_init_callback_data args;
   1.377 -
   1.378 -		args.start = start;
   1.379 -		args.end = start + size;
   1.380 -		args.nid = nid;
   1.381 -		args.zone = zone;
   1.382 -
   1.383 -		efi_memmap_walk(virtual_memmap_init, &args);
   1.384 -	}
   1.385 -}
   1.386 -
   1.387 -int
   1.388 -ia64_mfn_valid (unsigned long pfn)
   1.389 -{
   1.390 -	char byte;
   1.391 -	struct page_info *pg = mfn_to_page(pfn);
   1.392 -
   1.393 -	return     (__get_user(byte, (char *) pg) == 0)
   1.394 -		&& ((((u64)pg & PAGE_MASK) == (((u64)(pg + 1) - 1) & PAGE_MASK))
   1.395 -			|| (__get_user(byte, (char *) (pg + 1) - 1) == 0));
   1.396 -}
   1.397 -EXPORT_SYMBOL(ia64_mfn_valid);
   1.398 -
   1.399 -int
   1.400 -find_largest_hole (u64 start, u64 end, void *arg)
   1.401 -{
   1.402 -	u64 *max_gap = arg;
   1.403 -
   1.404 -	static u64 last_end = PAGE_OFFSET;
   1.405 -
   1.406 -	/* NOTE: this algorithm assumes efi memmap table is ordered */
   1.407 -
   1.408 -#ifdef XEN
   1.409 -//printf("find_largest_hole: start=%lx,end=%lx,max_gap=%lx\n",start,end,*(unsigned long *)arg);
   1.410 -#endif
   1.411 -	if (*max_gap < (start - last_end))
   1.412 -		*max_gap = start - last_end;
   1.413 -	last_end = end;
   1.414 -#ifdef XEN
   1.415 -//printf("find_largest_hole2: max_gap=%lx,last_end=%lx\n",*max_gap,last_end);
   1.416 -#endif
   1.417 -	return 0;
   1.418 -}
   1.419 -#endif /* CONFIG_VIRTUAL_MEM_MAP */
   1.420 -
   1.421 -#ifndef XEN
   1.422 -static int
   1.423 -count_reserved_pages (u64 start, u64 end, void *arg)
   1.424 -{
   1.425 -	unsigned long num_reserved = 0;
   1.426 -	unsigned long *count = arg;
   1.427 -
   1.428 -	for (; start < end; start += PAGE_SIZE)
   1.429 -		if (PageReserved(virt_to_page(start)))
   1.430 -			++num_reserved;
   1.431 -	*count += num_reserved;
   1.432 -	return 0;
   1.433 -}
   1.434 -#endif
   1.435 -
   1.436 -/*
   1.437 - * Boot command-line option "nolwsys" can be used to disable the use of any light-weight
   1.438 - * system call handler.  When this option is in effect, all fsyscalls will end up bubbling
   1.439 - * down into the kernel and calling the normal (heavy-weight) syscall handler.  This is
   1.440 - * useful for performance testing, but conceivably could also come in handy for debugging
   1.441 - * purposes.
   1.442 - */
   1.443 -
   1.444 -static int nolwsys;
   1.445 -
   1.446 -static int __init
   1.447 -nolwsys_setup (char *s)
   1.448 -{
   1.449 -	nolwsys = 1;
   1.450 -	return 1;
   1.451 -}
   1.452 -
   1.453 -__setup("nolwsys", nolwsys_setup);
   1.454 -
   1.455  void
   1.456  mem_init (void)
   1.457  {
     2.1 --- a/xen/include/asm-ia64/mm.h	Mon Apr 17 08:46:52 2006 -0600
     2.2 +++ b/xen/include/asm-ia64/mm.h	Mon Apr 17 08:47:36 2006 -0600
     2.3 @@ -139,11 +139,7 @@ extern spinlock_t free_list_lock;
     2.4  extern unsigned int free_pfns;
     2.5  extern unsigned long max_page;
     2.6  
     2.7 -#ifdef CONFIG_VIRTUAL_MEM_MAP
     2.8 -void __init init_frametable(void *frametable_vstart, unsigned long nr_pages);
     2.9 -#else
    2.10  extern void __init init_frametable(void);
    2.11 -#endif
    2.12  void add_to_domain_alloc_list(unsigned long ps, unsigned long pe);
    2.13  
    2.14  extern unsigned long gmfn_to_mfn_foreign(struct domain *d, unsigned long gpfn);