1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Xen memory allocator routines
*
* Copyright (C) 2005 Hewlett-Packard Co
* Dan Magenheimer <dan.magenheimer@hp.com>
* Copyright (C) 2005 Intel Corp.
*
* Routines used by ia64 machines with contiguous (or virtually contiguous)
* memory.
*/
#include <linux/config.h>
#include <asm/pgtable.h>
#include <xen/mm.h>
extern struct page *zero_page_memmap_ptr;
struct pfn_info *frame_table;
unsigned long frame_table_size;
unsigned long max_page;
struct page *mem_map;
#define MAX_DMA_ADDRESS ~0UL // FIXME???
#ifdef CONFIG_VIRTUAL_MEM_MAP
static unsigned long num_dma_physpages;
#endif
/*
* Set up the page tables.
*/
#ifdef CONFIG_VTI
unsigned long *mpt_table;
unsigned long *mpt_table_size;
#endif
void
paging_init (void)
{
struct pfn_info *pg;
#ifdef CONFIG_VTI
unsigned int mpt_order;
/* Create machine to physical mapping table
* NOTE: similar to frame table, later we may need virtually
* mapped mpt table if large hole exists. Also MAX_ORDER needs
* to be changed in common code, which only support 16M by far
*/
mpt_table_size = max_page * sizeof(unsigned long);
mpt_order = get_order(mpt_table_size);
ASSERT(mpt_order <= MAX_ORDER);
if ((mpt_table = alloc_xenheap_pages(mpt_order)) == NULL)
panic("Not enough memory to bootstrap Xen.\n");
printk("machine to physical table: 0x%lx\n", (u64)mpt_table);
memset(mpt_table, 0x55, mpt_table_size);
/* Any more setup here? On VMX enabled platform,
* there's no need to keep guest linear pg table,
* and read only mpt table. MAP cache is not used
* in this stage, and later it will be in region 5.
* IO remap is in region 6 with identity mapping.
*/
/* HV_tlb_init(); */
#else // CONFIG_VTI
/* Allocate and map the machine-to-phys table */
if ((pg = alloc_domheap_pages(NULL, 10)) == NULL)
panic("Not enough memory to bootstrap Xen.\n");
memset(page_to_virt(pg), 0x55, 16UL << 20);
#endif // CONFIG_VTI
/* Other mapping setup */
zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page));
}
/* FIXME: postpone support to machines with big holes between physical memorys.
* Current hack allows only efi memdesc upto 4G place. (See efi.c)
*/
#ifndef CONFIG_VIRTUAL_MEM_MAP
#define FT_ALIGN_SIZE (16UL << 20)
void __init init_frametable(void)
{
unsigned long i, pfn;
frame_table_size = max_page * sizeof(struct pfn_info);
frame_table_size = (frame_table_size + PAGE_SIZE - 1) & PAGE_MASK;
/* Request continuous trunk from boot allocator, since HV
* address is identity mapped */
pfn = alloc_boot_pages(
frame_table_size >> PAGE_SHIFT, FT_ALIGN_SIZE >> PAGE_SHIFT);
if (pfn == 0)
panic("Not enough memory for frame table.\n");
frame_table = __va(pfn << PAGE_SHIFT);
memset(frame_table, 0, frame_table_size);
printk("size of frame_table: %lukB\n",
frame_table_size >> 10);
}
#endif
|
