diff options
| -rw-r--r-- | cpu-all.h | 2 | ||||
| -rw-r--r-- | exec.c | 40 |
2 files changed, 42 insertions, 0 deletions
@@ -928,6 +928,8 @@ void *cpu_physical_memory_map(target_phys_addr_t addr, int is_write); void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, int is_write, target_phys_addr_t access_len); +void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)); +void cpu_unregister_map_client(void *cookie); uint32_t ldub_phys(target_phys_addr_t addr); uint32_t lduw_phys(target_phys_addr_t addr); @@ -3053,10 +3053,49 @@ typedef struct { static BounceBuffer bounce; +typedef struct MapClient { + void *opaque; + void (*callback)(void *opaque); + LIST_ENTRY(MapClient) link; +} MapClient; + +static LIST_HEAD(map_client_list, MapClient) map_client_list + = LIST_HEAD_INITIALIZER(map_client_list); + +void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque)) +{ + MapClient *client = qemu_malloc(sizeof(*client)); + + client->opaque = opaque; + client->callback = callback; + LIST_INSERT_HEAD(&map_client_list, client, link); + return client; +} + +void cpu_unregister_map_client(void *_client) +{ + MapClient *client = (MapClient *)_client; + + LIST_REMOVE(client, link); +} + +static void cpu_notify_map_clients(void) +{ + MapClient *client; + + while (!LIST_EMPTY(&map_client_list)) { + client = LIST_FIRST(&map_client_list); + client->callback(client->opaque); + LIST_REMOVE(client, link); + } +} + /* Map a physical memory region into a host virtual address. * May map a subset of the requested range, given by and returned in *plen. * May return NULL if resources needed to perform the mapping are exhausted. * Use only for reads OR writes - not for read-modify-write operations. + * Use cpu_register_map_client() to know when retrying the map operation is + * likely to succeed. */ void *cpu_physical_memory_map(target_phys_addr_t addr, target_phys_addr_t *plen, @@ -3146,6 +3185,7 @@ void cpu_physical_memory_unmap(void *buffer, target_phys_addr_t len, } qemu_free(bounce.buffer); bounce.buffer = NULL; + cpu_notify_map_clients(); } /* warning: addr must be aligned */ |