new file mode 100644
@@ -0,0 +1,143 @@
+/*
+ * RX emulation
+ *
+ * Copyright (c) 2019 Yoshinori Sato
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include "cpu.h"
+#include "exec/log.h"
+#include "exec/cpu_ldst.h"
+#include "sysemu/sysemu.h"
+
+void rx_cpu_do_interrupt(CPUState *cs)
+{
+ RXCPU *cpu = RXCPU(cs);
+ CPURXState *env = &cpu->env;
+ int do_irq = cs->interrupt_request &
+ (CPU_INTERRUPT_HARD | CPU_INTERRUPT_SOFT | CPU_INTERRUPT_FIR);
+ int irq_vector = -1;
+
+ env->in_sleep = 0;
+
+ if (do_irq & CPU_INTERRUPT_HARD) {
+ irq_vector = env->irq;
+ cs->interrupt_request &= ~CPU_INTERRUPT_HARD;
+ }
+ if (irq_vector == -1 && do_irq & CPU_INTERRUPT_SOFT) {
+ irq_vector = env->sirq;
+ cs->interrupt_request &= ~CPU_INTERRUPT_SOFT;
+ }
+
+ if (qemu_loglevel_mask(CPU_LOG_INT)) {
+ if (cs->exception_index < 0x100) {
+ const char *expname;
+ switch (cs->exception_index) {
+ case 20:
+ expname = "previlage_violation";
+ break;
+ case 21:
+ expname = "access_exception";
+ break;
+ case 23:
+ expname = "illegal_instruction";
+ break;
+ case 25:
+ expname = "fpu_exception";
+ break;
+ case 30:
+ expname = "NMI_interrupt";
+ break;
+ }
+ qemu_log("exception 0x%02x [%s] raised\n",
+ cs->exception_index, expname);
+ } else {
+ if (do_irq & CPU_INTERRUPT_FIR)
+ qemu_log("fast interrupt raised\n");
+ else
+ qemu_log("interrupt 0x%02x raised\n",
+ irq_vector);
+ }
+ log_cpu_state(cs, 0);
+ }
+ if (env->psw_u) {
+ env->usp = env->regs[0];
+ } else {
+ env->isp = env->regs[0];
+ }
+ rx_cpu_pack_psw(env);
+ if ((do_irq & CPU_INTERRUPT_FIR) == 0) {
+ env->isp -= 4;
+ cpu_stl_all(env, env->isp, env->psw);
+ env->isp -= 4;
+ cpu_stl_all(env, env->isp, env->pc);
+ } else {
+ env->bpc = env->pc;
+ env->bpsw = env->psw;
+ }
+ env->psw_pm = env->psw_i = env->psw_u = 0;
+ env->regs[0] = env->isp;
+ if (do_irq) {
+ if (do_irq & CPU_INTERRUPT_FIR) {
+ env->pc = env->fintv;
+ env->psw_ipl = 15;
+ cs->interrupt_request &= ~CPU_INTERRUPT_FIR;
+ qemu_set_irq(env->ack, 0);
+ return;
+ } else if (do_irq & CPU_INTERRUPT_HARD) {
+ env->psw_ipl = env->intlevel;
+ qemu_set_irq(env->ack, 0);
+ }
+ env->pc = cpu_ldl_all(env, env->intb + irq_vector * 4);
+ return;
+ } else {
+ uint32_t vec = cs->exception_index;
+ env->pc = cpu_ldl_all(env, 0xffffffc0 + vec * 4);
+ return;
+ }
+}
+
+bool rx_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
+{
+ RXCPU *cpu = RXCPU(cs);
+ CPURXState *env = &cpu->env;
+ int accept = 0;
+ /* software interrupt */
+ if (interrupt_request & CPU_INTERRUPT_SOFT) {
+ accept = 1;
+ }
+ /* hardware interrupt (Normal) */
+ if ((interrupt_request & CPU_INTERRUPT_HARD) &&
+ env->psw_i && (env->psw_ipl < env->intlevel)) {
+ accept = 1;
+ }
+ /* hardware interrupt (FIR) */
+ if ((interrupt_request & CPU_INTERRUPT_FIR) &&
+ env->psw_i && (env->psw_ipl < 15)) {
+ accept = 1;
+ }
+ if (accept) {
+ rx_cpu_do_interrupt(cs);
+ return true;
+ }
+ return false;
+}
+
+hwaddr rx_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
+{
+ return addr;
+}
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp> --- target/rx/helper.c | 143 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 target/rx/helper.c