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base: implement detach for core context_area 

Required to destroy threads within in core. Used when IRQs get reused on
platforms where every IRQ needs a thread in core.

Issue #1471
This commit is contained in:
Alexander Boettcher 2015-05-11 15:36:35 +02:00 committed by Christian Helmuth
parent 3a378bb970
commit 3783db66e2
1 changed files with 17 additions and 3 deletions
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20
repos/base/src/core/context_area.cc
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@ -98,7 +98,22 @@ class Context_area_rm_session : public Rm_session
return local_addr;
}
void detach(Local_addr local_addr) { PWRN("Not implemented!"); }
void detach(Local_addr local_addr)
{
using Genode::addr_t;
if ((addr_t)local_addr >= Native_config::context_area_virtual_size())
return;
addr_t const detach = Native_config::context_area_virtual_base() +
(addr_t)local_addr;
addr_t const thread_context = Native_config::context_virtual_size();
addr_t const pages = ((detach & ~(thread_context - 1))
+ thread_context
- detach) >> get_page_size_log2();
unmap_local(detach, pages);
}
Pager_capability add_client(Thread_capability) {
return Pager_capability(); }
@ -120,8 +135,7 @@ class Context_area_ram_session : public Ram_session
Ram_dataspace_capability alloc(size_t size, Cache_attribute cached) {
return reinterpret_cap_cast<Ram_dataspace>(Native_capability()); }
void free(Ram_dataspace_capability ds) {
PWRN("Not implemented!"); }
void free(Ram_dataspace_capability ds) { }
int ref_account(Ram_session_capability ram_session) { return 0; }