3 * \brief User-lock implementation for amd64
6 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
7 * Alexander Warg <warg@os.inf.tu-dresden.de>
8 * economic rights: Technische Universität Dresden (Germany)
10 * This file is part of TUD:OS and distributed under the terms of the
11 * GNU General Public License 2.
12 * Please see the COPYING-GPL-2 file for details.
14 * As a special exception, you may use this file as part of a free software
15 * library without restriction. Specifically, if other files instantiate
16 * templates or use macros or inline functions from this file, or you compile
17 * this file and link it with other files to produce an executable, this
18 * file does not by itself cause the resulting executable to be covered by
19 * the GNU General Public License. This exception does not however
20 * invalidate any other reasons why the executable file might be covered by
21 * the GNU General Public License.
25 #include <l4/sys/utcb.h>
26 #include <l4/sys/ipc-invoke.h>
29 l4_usem_down_to(l4_cap_idx_t ksem, l4_u_semaphore_t *sem, l4_timeout_s timeout) L4_NOTHROW
33 l4_utcb_mr()->mr[0] = (l4_addr_t)sem;
37 unsigned long dummy1, dummy2, dummy3;
39 " xor %%rax, %%rax \n\t"
58 while (l4_msgtag_label(res) == L4_USEM_RETRY);
64 l4_usem_up(l4_cap_idx_t ksem, l4_u_semaphore_t *sem) L4_NOTHROW
67 l4_utcb_mr()->mr[0] = (l4_addr_t)sem;
69 "xor %%rax, %%rax \n\t"
71 "testb $1, 8(%%rdi) \n\t"
73 "mov $0x10001, %%rax \n\t"
84 "rcx", "rsi", "memory"