Subversion Repositories HelenOS-historic

Rev

Rev 755 | Rev 757 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 755 Rev 756
Line 36... Line 36...
36 
#include <typedefs.h>
 36 
#include <typedefs.h>
37 
#include <arch/asm.h>
 37 
#include <arch/asm.h>
38 
#include <synch/spinlock.h>
 38 
#include <synch/spinlock.h>
39 
#include <arch.h>
 39 
#include <arch.h>
40 
#include <debug.h>
 40 
#include <debug.h>
- 
 
 41 
#include <memstr.h>
41 
 
 42 
 
42 
/**
 43 
/**
43 
 * This lock protects the page hash table. Note that software must
 44 
 * This lock protects the page hash table.
44 
 * be still careful about ordering of writes to ensure consistent
 - 
 
45 
 * view of the page hash table for hardware helpers such as VHPT
 - 
 
46 
 * walker on ia64.
 - 
 
47 
 */
 45 
 */
48 
SPINLOCK_INITIALIZE(page_ht_lock);
 46 
SPINLOCK_INITIALIZE(page_ht_lock);
49 
 
 47 
 
50 
/**
 48 
/**
51 
 * Page hash table pointer.
 49 
 * Page hash table pointer.
52 
 * The page hash table may be accessed only when page_ht_lock is held.
 50 
 * The page hash table may be accessed only when page_ht_lock is held.
53 
 */
 51 
 */
54 
pte_t *page_ht = NULL;
 52 
pte_t *page_ht = NULL;
55 
 
 53 
 
56 
static void ht_mapping_insert(as_t *as, __address page, __address frame, int flags, __address root);
 54 
static void ht_mapping_insert(as_t *as, __address page, __address frame, int flags);
57 
static pte_t *ht_mapping_find(as_t *as, __address page, __address root);
 55 
static pte_t *ht_mapping_find(as_t *as, __address page);
58 
 
 56 
 
59 
page_operations_t page_ht_operations = {
 57 
page_operations_t page_ht_operations = {
60 
    .mapping_insert = ht_mapping_insert,
 58 
    .mapping_insert = ht_mapping_insert,
61 
    .mapping_find = ht_mapping_find
 59 
    .mapping_find = ht_mapping_find,
62 
};
 60 
};
63 
 
 61 
 
64 
/** Map page to frame using page hash table.
 62 
/** Map page to frame using page hash table.
65 
 *
 63 
 *
66 
 * Map virtual address 'page' to physical address 'frame'
 64 
 * Map virtual address 'page' to physical address 'frame'
67 
 * using 'flags'. In order not to disturb hardware searching,
 - 
 
68 
 * new mappings are appended to the end of the collision
 - 
 
69 
 * chain.
 65 
 * using 'flags'.
70 
 *
 66 
 *
- 
 
 67 
 * The address space must be locked and interruptsmust be disabled.
- 
 
 68 
 *
71 
 * @param as Address space to which page belongs. Must be locked prior the call.
 69 
 * @param as Address space to which page belongs.
72 
 * @param page Virtual address of the page to be mapped.
 70 
 * @param page Virtual address of the page to be mapped.
73 
 * @param frame Physical address of memory frame to which the mapping is done.
 71 
 * @param frame Physical address of memory frame to which the mapping is done.
74 
 * @param flags Flags to be used for mapping.
 72 
 * @param flags Flags to be used for mapping.
75 
 * @param root Ignored.
 - 
 
76 
 */
 73 
 */
77 
void ht_mapping_insert(as_t *as, __address page, __address frame, int flags, __address root)
 74 
void ht_mapping_insert(as_t *as, __address page, __address frame, int flags)
78 
{
 75 
{
79 
    pte_t *t, *u;
 76 
    pte_t *t, *u;
80 
    ipl_t ipl;
 77 
    ipl_t ipl;
81 
   
 78 
   
82 
    ipl = interrupts_disable();
 79 
    ipl = interrupts_disable();
Line 119... Line 116...
119 
 
 116 
 
120 
/** Find mapping for virtual page in page hash table.
 117 
/** Find mapping for virtual page in page hash table.
121 
 *
 118 
 *
122 
 * Find mapping for virtual page.
 119 
 * Find mapping for virtual page.
123 
 *
 120 
 *
124 
 * Interrupts must be disabled.
 121 
 * The address space must be locked and interrupts must be disabled.
125 
 *
 122 
 *
126 
 * @param as Address space to wich page belongs. Must be locked prior the call.
 123 
 * @param as Address space to wich page belongs.
127 
 * @param page Virtual page.
 124 
 * @param page Virtual page.
128 
 * @param root Ignored.
 - 
 
129 
 *
 125 
 *
130 
 * @return NULL if there is no such mapping; requested mapping otherwise.
 126 
 * @return NULL if there is no such mapping; requested mapping otherwise.
131 
 */
 127 
 */
132 
pte_t *ht_mapping_find(as_t *as, __address page, __address root)
 128 
pte_t *ht_mapping_find(as_t *as, __address page)
133 
{
 129 
{
134 
    pte_t *t;
 130 
    pte_t *t;
135 
   
 131 
   
136 
    spinlock_lock(&page_ht_lock);
 132 
    spinlock_lock(&page_ht_lock);
137 
    t = HT_HASH(page, as->asid);
 133 
    t = HT_HASH(page, as->asid);