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 24uintptr_t qemu_real_host_page_size; 25intptr_t qemu_real_host_page_mask; 26 27#ifndef CONFIG_USER_ONLY 28/* mask must never be zero, except for A20 change call */ 29static void tcg_handle_interrupt(CPUState *cpu, int mask) 30{ 31 int old_mask; 32 33 old_mask = cpu->interrupt_request; 34 cpu->interrupt_request |= mask; 35 36 /* 37 * If called from iothread context, wake the target cpu in 38 * case its halted. 39 */ 40 if (!qemu_cpu_is_self(cpu)) { 41 qemu_cpu_kick(cpu); 42 return; 43 } 44 45 if (use_icount) { 46 cpu->icount_decr.u16.high = 0xffff; 47 if (!cpu->can_do_io 48 && (mask & ~old_mask) != 0) { 49 cpu_abort(cpu, "Raised interrupt while not in I/O function"); 50 } 51 } else { 52 cpu->tcg_exit_req = 1; 53 } 54} 55 56CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt; 57#endif 58