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9b68a775 PC |
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-common.h" | |
21 | #include "qom/cpu.h" | |
22 | ||
23 | #ifndef CONFIG_USER_ONLY | |
24 | /* mask must never be zero, except for A20 change call */ | |
25 | static void tcg_handle_interrupt(CPUState *cpu, int mask) | |
26 | { | |
27 | int old_mask; | |
28 | ||
29 | old_mask = cpu->interrupt_request; | |
30 | cpu->interrupt_request |= mask; | |
31 | ||
32 | /* | |
33 | * If called from iothread context, wake the target cpu in | |
34 | * case its halted. | |
35 | */ | |
36 | if (!qemu_cpu_is_self(cpu)) { | |
37 | qemu_cpu_kick(cpu); | |
38 | return; | |
39 | } | |
40 | ||
41 | if (use_icount) { | |
42 | cpu->icount_decr.u16.high = 0xffff; | |
43 | if (!cpu->can_do_io | |
44 | && (mask & ~old_mask) != 0) { | |
45 | cpu_abort(cpu, "Raised interrupt while not in I/O function"); | |
46 | } | |
47 | } else { | |
48 | cpu->tcg_exit_req = 1; | |
49 | } | |
50 | } | |
51 | ||
52 | CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; | |
53 | #endif |