diff options
Diffstat (limited to 'include/mach/gnumach.defs')
| -rw-r--r-- | include/mach/gnumach.defs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/mach/gnumach.defs b/include/mach/gnumach.defs index 97ab573c..d423a10a 100644 --- a/include/mach/gnumach.defs +++ b/include/mach/gnumach.defs @@ -165,3 +165,27 @@ routine vm_msync( address : vm_address_t; size : vm_size_t; sync_flags : vm_sync_t); + +/* + * This routine is created for allocating DMA buffers. + * We are going to get a contiguous physical memory + * and its physical address in addition to the virtual address. + * We can specify physical memory range limits and alignment. + * NB: + * pmax is defined as the byte after the maximum address, + * eg 0x100000000 for 4GiB limit. + */ +/* XXX + * Future work: the RPC should return a special + * memory object (similar to device_map() ), which can then be mapped into + * the process address space with vm_map() like any other memory object. + */ +routine vm_allocate_contiguous( + host_priv : host_priv_t; + target_task : vm_task_t; + out vaddr : vm_address_t; + out paddr : rpc_phys_addr_t; + size : vm_size_t; + pmin : rpc_phys_addr_t; + pmax : rpc_phys_addr_t; + palign : rpc_phys_addr_t); |