ppc/pnv: Add support for POWER8+ LPC Controller
[qemu.git] / translate-common.c
1 /*
2 * Host code generation common components
3 *
4 * Copyright (c) 2015 Peter Crosthwaite <crosthwaite.peter@gmail.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "qom/cpu.h"
23 #include "sysemu/cpus.h"
24 #include "qemu/main-loop.h"
25
26 uintptr_t qemu_real_host_page_size;
27 intptr_t qemu_real_host_page_mask;
28
29 #ifndef CONFIG_USER_ONLY
30 /* mask must never be zero, except for A20 change call */
31 static void tcg_handle_interrupt(CPUState *cpu, int mask)
32 {
33 int old_mask;
34 g_assert(qemu_mutex_iothread_locked());
35
36 old_mask = cpu->interrupt_request;
37 cpu->interrupt_request |= mask;
38
39 /*
40 * If called from iothread context, wake the target cpu in
41 * case its halted.
42 */
43 if (!qemu_cpu_is_self(cpu)) {
44 qemu_cpu_kick(cpu);
45 } else {
46 cpu->icount_decr.u16.high = -1;
47 if (use_icount &&
48 !cpu->can_do_io
49 && (mask & ~old_mask) != 0) {
50 cpu_abort(cpu, "Raised interrupt while not in I/O function");
51 }
52 }
53 }
54
55 CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
56 #endif