diff options
Diffstat (limited to 'libhurd-mm/mm.h')
| -rw-r--r-- | libhurd-mm/mm.h | 141 |
1 files changed, 4 insertions, 137 deletions
diff --git a/libhurd-mm/mm.h b/libhurd-mm/mm.h index e18201e..ffa3daa 100644 --- a/libhurd-mm/mm.h +++ b/libhurd-mm/mm.h @@ -22,143 +22,10 @@ #ifndef HURD_MM_MM_H #define HURD_MM_MM_H -#include <stdint.h> -#include <sys/types.h> -#include <l4/types.h> -#include <hurd/physmem.h> +#include <hurd/addr.h> -/* Start the memory manager including starting the user pager and the - virtual memory management subsystem on thread PAGER_TID. */ -extern void hurd_mm_init (l4_thread_id_t pager_tid); - -/* A region of memory. */ -struct region -{ - /* Start of the region. */ - uintptr_t start; - /* And its extent. */ - size_t size; -}; - -/* Backing store abstraction. */ -struct hurd_store; -typedef struct hurd_store hurd_store_t; - -/* Physical memory abstraction. */ -struct hurd_memory; -typedef struct hurd_memory hurd_memory_t; - -/* Allocate a new memory structure referring to size bytes of physical - memory. Return NULL on failure. The returned memory needs to be - integrated into the appropriate store's cache (using - hurd_memory_insert). */ -extern hurd_memory_t *hurd_memory_alloc (size_t size); - -/* Allocate a new memory structure referring to the physical memory on - container CONTAINER starting at CONT_START and continuing for SIZE - bytes. The physical memory becomes fully managed by the memory - manager and must only be deallocated via the hurd_memory_dealloc - interface. (Hence, CONTAINER must not be deallocated until the - memory manager no longer references it.) */ -extern hurd_memory_t *hurd_memory_use (hurd_pm_container_t container, - uintptr_t cont_start, - size_t size); - -/* Allocate a new memory structure referring to the physical memory on - container CONTAINER starting at CONT_START and continuing for SIZE - bytes. The physical memory is logically copied (and deallocated - from CONTAINER if MOVE is true) to an internal container. Hence, - unlike hurd_memory_use, hurd_memory_transfer obtains its own - reference to the physical memory. NB: if MOVE is false the memory - is referenced by two containers and those count doubly against the - task's physical memory allocation. */ -extern hurd_memory_t *hurd_memory_transfer (hurd_pm_container_t container, - uintptr_t cont_start, - size_t size, - bool move); - -/* Deallocate the physical memory MEMORY associated with store STORE - starting at START (relative to the base of MEMORY) and continuing - for LENGHT bytes. If START is 0 and LENGTH is the length of - MEMORY, MEMORY is deallocated (and detached from STORE). If START - is greater than zero and START + LENGTH is less than the size of - MEMORY then MEMORY is adjusted to refer to the first portion of - memory, a new MEMORY structure is allocated to refer the end and - physical memory referred to by the middle part is freed. - Otherwise, MEMORY is adjusted to refer to the physical memory which - will not be deallocated and the rest of the physical memory is - deallocated. */ -extern void hurd_memory_dealloc (hurd_store_t *store, hurd_memory_t *memory, - uintptr_t start, size_t length); - -/* Install a map of memory MEMORY starting at offset MEMORY_OFFSET - (relative to the base of MEMORY) extending LENGTH bytes in the - address space at virtual memory address VADDR. (To map an entire - memory block, pass OFFSET equal to 0 and LENGTH equal to - MEMORY->STORE.SIZE.) OFFSET must be aligned on a multiple of the - base page size and LENGTH must be a multiple of the base page - size. */ -extern error_t hurd_memory_map (hurd_memory_t *memory, size_t memory_offset, - size_t length, uintptr_t vaddr); - -/* Thread THREAD faulted at address ADDR which is contained in the - registered region REGION. */ -typedef void (*hurd_store_fault_t) (hurd_store_t *store, void *hook, - l4_thread_id_t thread, - struct region vm_region, - off64_t store_offset, - uintptr_t addr, l4_word_t access); - -/* Initialize a store. STORE points to allocated memory. */ -extern void hurd_store_init (hurd_store_t *store, - void *hook, hurd_store_fault_t fault); - -/* The number of bytes required for a store. */ -extern size_t hurd_store_size (void) __attribute__ ((const)); - -extern void hurd_store_destroy (hurd_store_t *store); - -/* Either allocate a region exactly at the specified address or - fail. */ -#define HURD_VM_HERE (1 << 0) - -/* A store manager may call this to indicate that STORE will manage - faults for the addresses starting at ADDRESS and extending for SIZE - bytes. If ADDRESS is 0, the memory manager selects a free virtual - memory region. If ADDRESS is non-zero and HURD_VM_HERE is not set - in FLAGS, then ADDRESS is used as a hint. If HURD_VM_HERE is set - in the flags, ADDRESS is used if possible otherwise, EEXIST is - returned. The function returns the start of the virtual memory - address actually used on success in *USED_ADDRESS if USED_ADDRESS - is not-NULL. On success, 0 is returned. An error code - otherwise. */ -extern error_t hurd_store_bind_to_vm (hurd_store_t *store, - off64_t store_offset, - uintptr_t address, size_t size, - uintptr_t flags, int map_now, - uintptr_t *used_address); - -/* Record that memory MEMORY caches backing store STORE starting at - byte STORE_START. */ -extern void hurd_store_cache (hurd_store_t *store, uintptr_t store_start, - hurd_memory_t *memory); - -/* Find the first memory region (i.e. the one with the lowest starting - address) which intersects with regions covering STORE starting at - STORE_START and spanning LENGTH bytes. If none is found, return - NULL. - - NB: The intersection of any two memory regions will always be NULL, - however, it is possible that the region one is looking up on the - store is covered by multiple memory regions. This function returns - the first of those. */ -extern hurd_memory_t *hurd_store_find_cached (hurd_store_t *store, - uintptr_t store_start, - size_t length); - -/* Flush any memory mapping the backing store starting at STORE_START - and continuing for LENGTH bytes to backing store. */ -extern void hurd_store_flush (hurd_store_t *store, - uintptr_t store_start, size_t length); +/* Initialize the memory management sub-system. ACTIVITY is the + activity to use to account meta-data resources. */ +extern void mm_init (addr_t activity); #endif /* HURD_MM_MM_H */ |