4 * Copyright (c) 2019 Yoshinori Sato
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2 or later, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
20 #include "qemu/bitops.h"
23 #include "exec/cpu_ldst.h"
24 #include "sysemu/sysemu.h"
27 void rx_cpu_unpack_psw(CPURXState *env, uint32_t psw, int rte)
29 if (env->psw_pm == 0) {
30 env->psw_ipl = FIELD_EX32(psw, PSW, IPL);
32 /* PSW.PM can write RTE and RTFI */
33 env->psw_pm = FIELD_EX32(psw, PSW, PM);
35 env->psw_u = FIELD_EX32(psw, PSW, U);
36 env->psw_i = FIELD_EX32(psw, PSW, I);
38 env->psw_o = FIELD_EX32(psw, PSW, O) << 31;
39 env->psw_s = FIELD_EX32(psw, PSW, S) << 31;
40 env->psw_z = 1 - FIELD_EX32(psw, PSW, Z);
41 env->psw_c = FIELD_EX32(psw, PSW, C);
44 #define INT_FLAGS (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIR)
45 void rx_cpu_do_interrupt(CPUState *cs)
47 RXCPU *cpu = RXCPU(cs);
48 CPURXState *env = &cpu->env;
49 int do_irq = cs->interrupt_request & INT_FLAGS;
55 env->usp = env->regs[0];
57 env->isp = env->regs[0];
59 save_psw = rx_cpu_pack_psw(env);
60 env->psw_pm = env->psw_i = env->psw_u = 0;
63 if (do_irq & CPU_INTERRUPT_FIR) {
68 cs->interrupt_request &= ~CPU_INTERRUPT_FIR;
69 qemu_set_irq(env->ack, env->ack_irq);
70 qemu_log_mask(CPU_LOG_INT, "fast interrupt raised\n");
71 } else if (do_irq & CPU_INTERRUPT_HARD) {
73 cpu_stl_data(env, env->isp, save_psw);
75 cpu_stl_data(env, env->isp, env->pc);
76 env->pc = cpu_ldl_data(env, env->intb + env->ack_irq * 4);
77 env->psw_ipl = env->ack_ipl;
78 cs->interrupt_request &= ~CPU_INTERRUPT_HARD;
79 qemu_set_irq(env->ack, env->ack_irq);
80 qemu_log_mask(CPU_LOG_INT,
81 "interrupt 0x%02x raised\n", env->ack_irq);
84 uint32_t vec = cs->exception_index;
85 const char *expname = "unknown exception";
88 cpu_stl_data(env, env->isp, save_psw);
90 cpu_stl_data(env, env->isp, env->pc);
93 env->pc = cpu_ldl_data(env, 0xffffffc0 + vec * 4);
95 env->pc = cpu_ldl_data(env, env->intb + (vec & 0xff) * 4);
99 expname = "privilege violation";
102 expname = "access exception";
105 expname = "illegal instruction";
108 expname = "fpu exception";
111 expname = "non-maskable interrupt";
113 case 0x100 ... 0x1ff:
114 expname = "unconditional trap";
116 qemu_log_mask(CPU_LOG_INT, "exception 0x%02x [%s] raised\n",
117 (vec & 0xff), expname);
119 env->regs[0] = env->isp;
122 bool rx_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
124 RXCPU *cpu = RXCPU(cs);
125 CPURXState *env = &cpu->env;
127 /* hardware interrupt (Normal) */
128 if ((interrupt_request & CPU_INTERRUPT_HARD) &&
129 env->psw_i && (env->psw_ipl < env->req_ipl)) {
130 env->ack_irq = env->req_irq;
131 env->ack_ipl = env->req_ipl;
134 /* hardware interrupt (FIR) */
135 if ((interrupt_request & CPU_INTERRUPT_FIR) &&
136 env->psw_i && (env->psw_ipl < 15)) {
140 rx_cpu_do_interrupt(cs);
146 hwaddr rx_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)