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| author | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-05-12 15:52:25 +0300 |
|---|---|---|
| committer | Kimplul <kimi.h.kuparinen@gmail.com> | 2022-05-12 15:52:25 +0300 |
| commit | 1ea7d9dec1b460ab76dfd6270596c8138c9c2b40 (patch) | |
| tree | 0e8799fe0d7a653e864bd90c65a29e4012026f71 /include | |
| parent | 42a1e087ce99f07b48aaea5552f8e1ce5219d228 (diff) | |
| download | kmi-1ea7d9dec1b460ab76dfd6270596c8138c9c2b40.tar.gz kmi-1ea7d9dec1b460ab76dfd6270596c8138c9c2b40.zip | |
initial workings of shared memory
+ Should document this better but essentially a server requests a shared
buffer, and chan then share this buffer to a thread. Freeing the
buffer is done through normal means. MR_SHARED is used for buffers
that are shared, and MR_OWNED tells whoever is freeing that region
that it is allowed to free the physical memory behind the shared
buffer.
Diffstat (limited to 'include')
| -rw-r--r-- | include/apos/mem.h | 7 | ||||
| -rw-r--r-- | include/apos/mem_regions.h | 6 | ||||
| -rw-r--r-- | include/apos/vmem.h | 12 |
3 files changed, 21 insertions, 4 deletions
diff --git a/include/apos/mem.h b/include/apos/mem.h index ece8ee3..bc60f21 100644 --- a/include/apos/mem.h +++ b/include/apos/mem.h @@ -39,6 +39,13 @@ __page((x) + BASE_PAGE_SIZE)) #define __bytes(x) (__addr(x)) +/* if memory region is used or not */ +#define MR_USED (1 << 8) +/* if memory region is shared */ +#define MR_SHARED (1 << 9) +/* owner of shared region */ +#define MR_OWNED (1 << 10) + extern size_t __mm_shifts[10]; extern size_t __mm_widths[10]; extern size_t __mm_sizes[10]; diff --git a/include/apos/mem_regions.h b/include/apos/mem_regions.h index e2ab64b..7841dde 100644 --- a/include/apos/mem_regions.h +++ b/include/apos/mem_regions.h @@ -28,10 +28,12 @@ struct mem_region { stat_t init_region(struct mem_region_root *r, vm_t start, size_t arena_size); void destroy_region(struct mem_region_root *r); -vm_t alloc_region(struct mem_region_root *r, size_t size, size_t *actual_size); +vm_t alloc_region(struct mem_region_root *r, size_t size, size_t *actual_size, + vmflags_t flags); vm_t alloc_fixed_region(struct mem_region_root *r, vm_t start, size_t size, - size_t *actual_size); + size_t *actual_size, vmflags_t flags); stat_t free_region(struct mem_region_root *r, vm_t start); +stat_t free_known_region(struct mem_region_root *r, struct mem_region *m); struct mem_region *find_used_region(struct mem_region_root *r, vm_t start); struct mem_region *find_closest_used_region(struct mem_region_root *r, diff --git a/include/apos/vmem.h b/include/apos/vmem.h index 571b906..5b5037d 100644 --- a/include/apos/vmem.h +++ b/include/apos/vmem.h @@ -8,20 +8,28 @@ vm_t alloc_uvmem(struct tcb *r, size_t size, vmflags_t flags); vm_t alloc_fixed_uvmem(struct tcb *r, vm_t start, size_t size, vmflags_t flags); +vm_t alloc_shared_uvmem(struct tcb *r, size_t size, + vmflags_t flags); +vm_t ref_shared_uvmem(struct tcb *r1, struct tcb *r2, vm_t va, vmflags_t flags); stat_t free_uvmem(struct tcb *r, vm_t a); stat_t init_uvmem(struct tcb *r, vm_t base, vm_t top); stat_t alloc_uvmem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, vmflags_t flags, enum mm_order order); +stat_t alloc_shared_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, + vmflags_t flags, enum mm_order order); stat_t free_uvmem_wrapper(struct vm_branch *b, pm_t *offset, vm_t vaddr, vmflags_t flags, enum mm_order order); #define map_allocd_region(b, start, bytes, flags) \ map_fill_region(b, &alloc_uvmem_wrapper, 0, start, bytes, flags) -#define unmap_freed_region(b, start, bytes) \ - map_fill_region(b, &free_uvmem_wrapper, 0, start, bytes, 0) +#define map_shared_region(b, start, bytes, flags)\ + map_fill_region(b, &alloc_shared_wrapper, 0, start, bytes, flags) + +#define unmap_freed_region(b, start, bytes, flags) \ + map_fill_region(b, &free_uvmem_wrapper, 0, start, bytes, flags) #define vm_flags(x) ((x) & ~0xff) #define vp_flags(x) ((x)&0xff) |