jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * QEMU HPPA CPU
3 *
4 * Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
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 2.1 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
18 * <http://www.gnu.org/licenses/lgpl-2.1.html>
19 */
20
21#include "qemu/osdep.h"
22#include "qapi/error.h"
23#include "qemu/qemu-print.h"
24#include "cpu.h"
25#include "qemu/module.h"
26#include "exec/exec-all.h"
27#include "fpu/softfloat.h"
28
29
30static void hppa_cpu_set_pc(CPUState *cs, vaddr value)
31{
32 HPPACPU *cpu = HPPA_CPU(cs);
33
34 cpu->env.iaoq_f = value;
35 cpu->env.iaoq_b = value + 4;
36}
37
38static void hppa_cpu_synchronize_from_tb(CPUState *cs, TranslationBlock *tb)
39{
40 HPPACPU *cpu = HPPA_CPU(cs);
41
42#ifdef CONFIG_USER_ONLY
43 cpu->env.iaoq_f = tb->pc;
44 cpu->env.iaoq_b = tb->cs_base;
45#else
46 /* Recover the IAOQ values from the GVA + PRIV. */
47 uint32_t priv = (tb->flags >> TB_FLAG_PRIV_SHIFT) & 3;
48 target_ulong cs_base = tb->cs_base;
49 target_ulong iasq_f = cs_base & ~0xffffffffull;
50 int32_t diff = cs_base;
51
52 cpu->env.iasq_f = iasq_f;
53 cpu->env.iaoq_f = (tb->pc & ~iasq_f) + priv;
54 if (diff) {
55 cpu->env.iaoq_b = cpu->env.iaoq_f + diff;
56 }
57#endif
58
59 cpu->env.psw_n = (tb->flags & PSW_N) != 0;
60}
61
62static bool hppa_cpu_has_work(CPUState *cs)
63{
64 return cs->interrupt_request & CPU_INTERRUPT_HARD;
65}
66
67static void hppa_cpu_disas_set_info(CPUState *cs, disassemble_info *info)
68{
69 info->mach = bfd_mach_hppa20;
70 info->print_insn = print_insn_hppa;
71}
72
73static void hppa_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
74 MMUAccessType access_type,
75 int mmu_idx, uintptr_t retaddr)
76{
77 HPPACPU *cpu = HPPA_CPU(cs);
78 CPUHPPAState *env = &cpu->env;
79
80 cs->exception_index = EXCP_UNALIGN;
81 if (env->psw & PSW_Q) {
82 /* ??? Needs tweaking for hppa64. */
83 env->cr[CR_IOR] = addr;
84 env->cr[CR_ISR] = addr >> 32;
85 }
86
87 cpu_loop_exit_restore(cs, retaddr);
88}
89
90static void hppa_cpu_realizefn(DeviceState *dev, Error **errp)
91{
92 CPUState *cs = CPU(dev);
93 HPPACPUClass *acc = HPPA_CPU_GET_CLASS(dev);
94 Error *local_err = NULL;
95
96 cpu_exec_realizefn(cs, &local_err);
97 if (local_err != NULL) {
98 error_propagate(errp, local_err);
99 return;
100 }
101
102 qemu_init_vcpu(cs);
103 acc->parent_realize(dev, errp);
104
105#ifndef CONFIG_USER_ONLY
106 {
107 HPPACPU *cpu = HPPA_CPU(cs);
108 cpu->alarm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
109 hppa_cpu_alarm_timer, cpu);
110 }
111#endif
112}
113
114static void hppa_cpu_initfn(Object *obj)
115{
116 CPUState *cs = CPU(obj);
117 HPPACPU *cpu = HPPA_CPU(obj);
118 CPUHPPAState *env = &cpu->env;
119
120 cpu_set_cpustate_pointers(cpu);
121 cs->exception_index = -1;
122 cpu_hppa_loaded_fr0(env);
123 cpu_hppa_put_psw(env, PSW_W);
124}
125
126static ObjectClass *hppa_cpu_class_by_name(const char *cpu_model)
127{
128 return object_class_by_name(TYPE_HPPA_CPU);
129}
130
131static void hppa_cpu_class_init(ObjectClass *oc, void *data)
132{
133 DeviceClass *dc = DEVICE_CLASS(oc);
134 CPUClass *cc = CPU_CLASS(oc);
135 HPPACPUClass *acc = HPPA_CPU_CLASS(oc);
136
137 device_class_set_parent_realize(dc, hppa_cpu_realizefn,
138 &acc->parent_realize);
139
140 cc->class_by_name = hppa_cpu_class_by_name;
141 cc->has_work = hppa_cpu_has_work;
142 cc->do_interrupt = hppa_cpu_do_interrupt;
143 cc->cpu_exec_interrupt = hppa_cpu_exec_interrupt;
144 cc->dump_state = hppa_cpu_dump_state;
145 cc->set_pc = hppa_cpu_set_pc;
146 cc->synchronize_from_tb = hppa_cpu_synchronize_from_tb;
147 cc->gdb_read_register = hppa_cpu_gdb_read_register;
148 cc->gdb_write_register = hppa_cpu_gdb_write_register;
149 cc->tlb_fill = hppa_cpu_tlb_fill;
150#ifndef CONFIG_USER_ONLY
151 cc->get_phys_page_debug = hppa_cpu_get_phys_page_debug;
152 dc->vmsd = &vmstate_hppa_cpu;
153#endif
154 cc->do_unaligned_access = hppa_cpu_do_unaligned_access;
155 cc->disas_set_info = hppa_cpu_disas_set_info;
156 cc->tcg_initialize = hppa_translate_init;
157
158 cc->gdb_num_core_regs = 128;
159}
160
161static const TypeInfo hppa_cpu_type_info = {
162 .name = TYPE_HPPA_CPU,
163 .parent = TYPE_CPU,
164 .instance_size = sizeof(HPPACPU),
165 .instance_init = hppa_cpu_initfn,
166 .abstract = false,
167 .class_size = sizeof(HPPACPUClass),
168 .class_init = hppa_cpu_class_init,
169};
170
171static void hppa_cpu_register_types(void)
172{
173 type_register_static(&hppa_cpu_type_info);
174}
175
176type_init(hppa_cpu_register_types)