Revision e41d7c69 xen-mapcache.c
| b/xen-mapcache.c | ||
|---|---|---|
| 40 | 40 |
#endif |
| 41 | 41 |
#define MCACHE_BUCKET_SIZE (1UL << MCACHE_BUCKET_SHIFT) |
| 42 | 42 |
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#define mapcache_lock() ((void)0) |
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#define mapcache_unlock() ((void)0) |
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typedef struct MapCacheEntry {
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target_phys_addr_t paddr_index; |
| 45 | 48 |
uint8_t *vaddr_base; |
| ... | ... | |
| 79 | 82 |
return 0; |
| 80 | 83 |
} |
| 81 | 84 |
|
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void qemu_map_cache_init(void)
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void xen_map_cache_init(void)
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{
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unsigned long size; |
| 85 | 88 |
struct rlimit rlimit_as; |
| ... | ... | |
| 106 | 109 |
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size = mapcache->nr_buckets * sizeof (MapCacheEntry); |
| 108 | 111 |
size = (size + XC_PAGE_SIZE - 1) & ~(XC_PAGE_SIZE - 1); |
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DPRINTF("qemu_map_cache_init, nr_buckets = %lx size %lu\n", mapcache->nr_buckets, size);
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DPRINTF("%s, nr_buckets = %lx size %lu\n", __func__,
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mapcache->nr_buckets, size); |
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mapcache->entry = qemu_mallocz(size); |
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} |
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static void qemu_remap_bucket(MapCacheEntry *entry,
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target_phys_addr_t size,
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target_phys_addr_t address_index)
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static void xen_remap_bucket(MapCacheEntry *entry,
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target_phys_addr_t size, |
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target_phys_addr_t address_index) |
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{
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uint8_t *vaddr_base; |
| 118 | 122 |
xen_pfn_t *pfns; |
| ... | ... | |
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unsigned int i; |
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target_phys_addr_t nb_pfn = size >> XC_PAGE_SHIFT; |
| 122 | 126 |
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trace_qemu_remap_bucket(address_index);
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trace_xen_remap_bucket(address_index);
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pfns = qemu_mallocz(nb_pfn * sizeof (xen_pfn_t)); |
| 126 | 130 |
err = qemu_mallocz(nb_pfn * sizeof (int)); |
| ... | ... | |
| 164 | 168 |
qemu_free(err); |
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} |
| 166 | 170 |
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uint8_t *qemu_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, uint8_t lock) |
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uint8_t *xen_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size, |
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uint8_t lock) |
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{
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MapCacheEntry *entry, *pentry = NULL; |
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target_phys_addr_t address_index = phys_addr >> MCACHE_BUCKET_SHIFT; |
| 171 | 176 |
target_phys_addr_t address_offset = phys_addr & (MCACHE_BUCKET_SIZE - 1); |
| 172 | 177 |
target_phys_addr_t __size = size; |
| 173 | 178 |
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trace_qemu_map_cache(phys_addr);
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trace_xen_map_cache(phys_addr);
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if (address_index == mapcache->last_address_index && !lock && !__size) {
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trace_qemu_map_cache_return(mapcache->last_address_vaddr + address_offset);
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trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset);
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return mapcache->last_address_vaddr + address_offset; |
| 179 | 184 |
} |
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|
| ... | ... | |
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if (!entry) {
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entry = qemu_mallocz(sizeof (MapCacheEntry)); |
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pentry->next = entry; |
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qemu_remap_bucket(entry, __size, address_index);
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xen_remap_bucket(entry, __size, address_index);
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} else if (!entry->lock) {
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if (!entry->vaddr_base || entry->paddr_index != address_index || |
| 204 | 209 |
entry->size != __size || |
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!test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
| 206 | 211 |
entry->valid_mapping)) {
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qemu_remap_bucket(entry, __size, address_index);
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xen_remap_bucket(entry, __size, address_index);
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} |
| 209 | 214 |
} |
| 210 | 215 |
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if(!test_bits(address_offset >> XC_PAGE_SHIFT, size >> XC_PAGE_SHIFT, |
| 212 | 217 |
entry->valid_mapping)) {
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mapcache->last_address_index = -1; |
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trace_qemu_map_cache_return(NULL);
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trace_xen_map_cache_return(NULL);
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return NULL; |
| 216 | 221 |
} |
| 217 | 222 |
|
| ... | ... | |
| 226 | 231 |
QTAILQ_INSERT_HEAD(&mapcache->locked_entries, reventry, next); |
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} |
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trace_qemu_map_cache_return(mapcache->last_address_vaddr + address_offset);
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trace_xen_map_cache_return(mapcache->last_address_vaddr + address_offset);
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return mapcache->last_address_vaddr + address_offset; |
| 231 | 236 |
} |
| 232 | 237 |
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ram_addr_t qemu_ram_addr_from_mapcache(void *ptr)
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ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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{
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MapCacheEntry *entry = NULL, *pentry = NULL; |
| 236 | 241 |
MapCacheRev *reventry; |
| ... | ... | |
| 247 | 252 |
} |
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} |
| 249 | 254 |
if (!found) {
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fprintf(stderr, "qemu_ram_addr_from_mapcache, could not find %p\n", ptr);
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fprintf(stderr, "%s, could not find %p\n", __func__, ptr);
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QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
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DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index,
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reventry->vaddr_req); |
| ... | ... | |
| 269 | 274 |
((unsigned long) ptr - (unsigned long) entry->vaddr_base); |
| 270 | 275 |
} |
| 271 | 276 |
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void qemu_invalidate_entry(uint8_t *buffer)
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void xen_invalidate_map_cache_entry(uint8_t *buffer)
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{
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MapCacheEntry *entry = NULL, *pentry = NULL; |
| 275 | 280 |
MapCacheRev *reventry; |
| ... | ... | |
| 290 | 295 |
} |
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} |
| 292 | 297 |
if (!found) {
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DPRINTF("qemu_invalidate_entry, could not find %p\n", buffer);
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DPRINTF("%s, could not find %p\n", __func__, buffer);
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QTAILQ_FOREACH(reventry, &mapcache->locked_entries, next) {
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DPRINTF(" "TARGET_FMT_plx" -> %p is present\n", reventry->paddr_index, reventry->vaddr_req);
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| 296 | 301 |
} |
| ... | ... | |
| 322 | 327 |
qemu_free(entry); |
| 323 | 328 |
} |
| 324 | 329 |
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void qemu_invalidate_map_cache(void)
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void xen_invalidate_map_cache(void)
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| 326 | 331 |
{
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| 327 | 332 |
unsigned long i; |
| 328 | 333 |
MapCacheRev *reventry; |
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