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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 /common/dmem.c | |
| 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 'common/dmem.c')
| -rw-r--r-- | common/dmem.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/common/dmem.c b/common/dmem.c index 226b3f9..59ea666 100644 --- a/common/dmem.c +++ b/common/dmem.c @@ -53,10 +53,10 @@ vm_t alloc_devmem(struct tcb *t, pm_t dev_start, size_t bytes, vmflags_t flags) { vm_t region = 0; if (dev_start < __pre_top) - region = alloc_region(&pre_ram, bytes, 0); + region = alloc_region(&pre_ram, bytes, 0, flags); if (dev_start > __post_base) - region = alloc_region(&post_ram, bytes, 0); + region = alloc_region(&post_ram, bytes, 0, flags); if (!region) return 0; |