Revision 90260c6c exec.c
| b/exec.c | ||
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| 97 | 97 |
MemoryListener listener; |
| 98 | 98 |
}; |
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#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) |
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typedef struct subpage_t {
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MemoryRegion iomem; |
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hwaddr base; |
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uint16_t sub_section[TARGET_PAGE_SIZE]; |
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} subpage_t; |
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static MemoryRegionSection *phys_sections; |
| 101 | 108 |
static unsigned phys_sections_nb, phys_sections_nb_alloc; |
| 102 | 109 |
static uint16_t phys_section_unassigned; |
| ... | ... | |
| 220 | 227 |
} |
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static MemoryRegionSection *address_space_lookup_region(AddressSpace *as, |
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hwaddr addr) |
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hwaddr addr, |
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bool resolve_subpage) |
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{
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return phys_page_find(as->dispatch, addr >> TARGET_PAGE_BITS); |
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MemoryRegionSection *section; |
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subpage_t *subpage; |
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section = phys_page_find(as->dispatch, addr >> TARGET_PAGE_BITS); |
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if (resolve_subpage && section->mr->subpage) {
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subpage = container_of(section->mr, subpage_t, iomem); |
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section = &phys_sections[subpage->sub_section[SUBPAGE_IDX(addr)]]; |
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} |
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return section; |
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| 226 | 242 |
} |
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MemoryRegionSection *address_space_translate(AddressSpace *as, hwaddr addr,
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hwaddr *xlat, hwaddr *plen,
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bool is_write)
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static MemoryRegionSection *
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address_space_translate_internal(AddressSpace *as, hwaddr addr, hwaddr *xlat,
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hwaddr *plen, bool resolve_subpage)
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{
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MemoryRegionSection *section; |
| 233 | 249 |
Int128 diff; |
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section = address_space_lookup_region(as, addr); |
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section = address_space_lookup_region(as, addr, resolve_subpage);
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/* Compute offset within MemoryRegionSection */ |
| 237 | 253 |
addr -= section->offset_within_address_space; |
| 238 | 254 |
|
| ... | ... | |
| 243 | 259 |
*plen = int128_get64(int128_min(diff, int128_make64(*plen))); |
| 244 | 260 |
return section; |
| 245 | 261 |
} |
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MemoryRegionSection *address_space_translate(AddressSpace *as, hwaddr addr, |
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hwaddr *xlat, hwaddr *plen, |
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bool is_write) |
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{
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return address_space_translate_internal(as, addr, xlat, plen, true); |
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} |
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MemoryRegionSection * |
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address_space_translate_for_iotlb(AddressSpace *as, hwaddr addr, hwaddr *xlat, |
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hwaddr *plen) |
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{
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return address_space_translate_internal(as, addr, xlat, plen, false); |
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} |
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| 246 | 276 |
#endif |
| 247 | 277 |
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| 248 | 278 |
void cpu_exec_init_all(void) |
| ... | ... | |
| 697 | 727 |
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#if !defined(CONFIG_USER_ONLY) |
| 699 | 729 |
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#define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) |
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typedef struct subpage_t {
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MemoryRegion iomem; |
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hwaddr base; |
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uint16_t sub_section[TARGET_PAGE_SIZE]; |
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} subpage_t; |
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static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
| 708 | 731 |
uint16_t section); |
| 709 | 732 |
static subpage_t *subpage_init(hwaddr base); |
Also available in: Unified diff