ia64/xen-unstable

view xen/include/xen/mm.h @ 10341:68c22a722e6f

[XEN] Re-increase MAX_ORDER to 20 for the time being. Reducing
breaks domain0 builder.
Signed-off-by: Keir Fraser <keir@xensource.com>
author kaf24@firebug.cl.cam.ac.uk
date Fri Jun 09 08:15:58 2006 +0100 (2006-06-09)
parents 4f1e39ec05d6
children ee3d10828937
line source
1 /******************************************************************************
2 * include/xen/mm.h
3 *
4 * Definitions for memory pages, frame numbers, addresses, allocations, etc.
5 *
6 * Note that Xen must handle several different physical 'address spaces' and
7 * there is a consistent terminology for these:
8 *
9 * 1. gpfn/gpaddr: A guest-specific pseudo-physical frame number or address.
10 * 2. gmfn/gmaddr: A machine address from the p.o.v. of a particular guest.
11 * 3. mfn/maddr: A real machine frame number or address.
12 * 4. pfn/paddr: Used in 'polymorphic' functions that work across all
13 * address spaces, depending on context. See the pagetable
14 * conversion macros in asm-x86/page.h for examples.
15 * Also 'paddr_t' is big enough to store any physical address.
16 *
17 * This scheme provides consistent function and variable names even when
18 * different guests are running in different memory-management modes.
19 * 1. A guest running in auto-translated mode (e.g., shadow_mode_translate())
20 * will have gpfn == gmfn and gmfn != mfn.
21 * 2. A paravirtualised x86 guest will have gpfn != gmfn and gmfn == mfn.
22 * 3. A paravirtualised guest with no pseudophysical overlay will have
23 * gpfn == gpmfn == mfn.
24 *
25 * Copyright (c) 2002-2006, K A Fraser <keir@xensource.com>
26 */
28 #ifndef __XEN_MM_H__
29 #define __XEN_MM_H__
31 #include <xen/config.h>
32 #include <xen/types.h>
33 #include <xen/list.h>
34 #include <xen/spinlock.h>
36 struct domain;
37 struct page_info;
39 /* Boot-time allocator. Turns into generic allocator after bootstrap. */
40 paddr_t init_boot_allocator(paddr_t bitmap_start);
41 void init_boot_pages(paddr_t ps, paddr_t pe);
42 unsigned long alloc_boot_pages(unsigned long nr_pfns, unsigned long pfn_align);
43 void end_boot_allocator(void);
45 /* Generic allocator. These functions are *not* interrupt-safe. */
46 void init_heap_pages(
47 unsigned int zone, struct page_info *pg, unsigned long nr_pages);
48 struct page_info *alloc_heap_pages(unsigned int zone, unsigned int order);
49 void free_heap_pages(
50 unsigned int zone, struct page_info *pg, unsigned int order);
51 void scrub_heap_pages(void);
53 /* Xen suballocator. These functions are interrupt-safe. */
54 void init_xenheap_pages(paddr_t ps, paddr_t pe);
55 void *alloc_xenheap_pages(unsigned int order);
56 void free_xenheap_pages(void *v, unsigned int order);
57 #define alloc_xenheap_page() (alloc_xenheap_pages(0))
58 #define free_xenheap_page(v) (free_xenheap_pages(v,0))
60 /* Domain suballocator. These functions are *not* interrupt-safe.*/
61 void init_domheap_pages(paddr_t ps, paddr_t pe);
62 struct page_info *alloc_domheap_pages(
63 struct domain *d, unsigned int order, unsigned int flags);
64 void free_domheap_pages(struct page_info *pg, unsigned int order);
65 unsigned long avail_domheap_pages(void);
66 #define alloc_domheap_page(d) (alloc_domheap_pages(d,0,0))
67 #define free_domheap_page(p) (free_domheap_pages(p,0))
69 #define ALLOC_DOM_DMA 1
71 #ifdef CONFIG_PAGEALLOC_MAX_ORDER
72 #define MAX_ORDER CONFIG_PAGEALLOC_MAX_ORDER
73 #else
74 #define MAX_ORDER 20 /* 2^20 contiguous pages */
75 #endif
77 /* Automatic page scrubbing for dead domains. */
78 extern struct list_head page_scrub_list;
79 #define page_scrub_schedule_work() \
80 do { \
81 if ( !list_empty(&page_scrub_list) ) \
82 raise_softirq(PAGE_SCRUB_SOFTIRQ); \
83 } while ( 0 )
85 #include <asm/mm.h>
87 #ifndef sync_pagetable_state
88 #define sync_pagetable_state(d) ((void)0)
89 #endif
91 int guest_remove_page(struct domain *d, unsigned long gmfn);
93 #endif /* __XEN_MM_H__ */