cpu: Move halted and interrupt_request fields to CPUState
[qemu.git] / hw / sparc / leon3.c
1 /*
2 * QEMU Leon3 System Emulator
3 *
4 * Copyright (c) 2010-2011 AdaCore
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "hw/hw.h"
25 #include "qemu/timer.h"
26 #include "hw/ptimer.h"
27 #include "char/char.h"
28 #include "sysemu/sysemu.h"
29 #include "hw/boards.h"
30 #include "hw/loader.h"
31 #include "elf.h"
32 #include "trace.h"
33 #include "exec/address-spaces.h"
34
35 #include "hw/grlib.h"
36
37 /* Default system clock. */
38 #define CPU_CLK (40 * 1000 * 1000)
39
40 #define PROM_FILENAME "u-boot.bin"
41
42 #define MAX_PILS 16
43
44 typedef struct ResetData {
45 SPARCCPU *cpu;
46 uint32_t entry; /* save kernel entry in case of reset */
47 } ResetData;
48
49 static void main_cpu_reset(void *opaque)
50 {
51 ResetData *s = (ResetData *)opaque;
52 CPUState *cpu = CPU(s->cpu);
53 CPUSPARCState *env = &s->cpu->env;
54
55 cpu_reset(cpu);
56
57 cpu->halted = 0;
58 env->pc = s->entry;
59 env->npc = s->entry + 4;
60 }
61
62 void leon3_irq_ack(void *irq_manager, int intno)
63 {
64 grlib_irqmp_ack((DeviceState *)irq_manager, intno);
65 }
66
67 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
68 {
69 CPUSPARCState *env = (CPUSPARCState *)opaque;
70
71 assert(env != NULL);
72
73 env->pil_in = pil_in;
74
75 if (env->pil_in && (env->interrupt_index == 0 ||
76 (env->interrupt_index & ~15) == TT_EXTINT)) {
77 unsigned int i;
78
79 for (i = 15; i > 0; i--) {
80 if (env->pil_in & (1 << i)) {
81 int old_interrupt = env->interrupt_index;
82
83 env->interrupt_index = TT_EXTINT | i;
84 if (old_interrupt != env->interrupt_index) {
85 trace_leon3_set_irq(i);
86 cpu_interrupt(env, CPU_INTERRUPT_HARD);
87 }
88 break;
89 }
90 }
91 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
92 trace_leon3_reset_irq(env->interrupt_index & 15);
93 env->interrupt_index = 0;
94 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
95 }
96 }
97
98 static void leon3_generic_hw_init(QEMUMachineInitArgs *args)
99 {
100 ram_addr_t ram_size = args->ram_size;
101 const char *cpu_model = args->cpu_model;
102 const char *kernel_filename = args->kernel_filename;
103 SPARCCPU *cpu;
104 CPUSPARCState *env;
105 MemoryRegion *address_space_mem = get_system_memory();
106 MemoryRegion *ram = g_new(MemoryRegion, 1);
107 MemoryRegion *prom = g_new(MemoryRegion, 1);
108 int ret;
109 char *filename;
110 qemu_irq *cpu_irqs = NULL;
111 int bios_size;
112 int prom_size;
113 ResetData *reset_info;
114
115 /* Init CPU */
116 if (!cpu_model) {
117 cpu_model = "LEON3";
118 }
119
120 cpu = cpu_sparc_init(cpu_model);
121 if (cpu == NULL) {
122 fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
123 exit(1);
124 }
125 env = &cpu->env;
126
127 cpu_sparc_set_id(env, 0);
128
129 /* Reset data */
130 reset_info = g_malloc0(sizeof(ResetData));
131 reset_info->cpu = cpu;
132 qemu_register_reset(main_cpu_reset, reset_info);
133
134 /* Allocate IRQ manager */
135 grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
136
137 env->qemu_irq_ack = leon3_irq_manager;
138
139 /* Allocate RAM */
140 if ((uint64_t)ram_size > (1UL << 30)) {
141 fprintf(stderr,
142 "qemu: Too much memory for this machine: %d, maximum 1G\n",
143 (unsigned int)(ram_size / (1024 * 1024)));
144 exit(1);
145 }
146
147 memory_region_init_ram(ram, "leon3.ram", ram_size);
148 vmstate_register_ram_global(ram);
149 memory_region_add_subregion(address_space_mem, 0x40000000, ram);
150
151 /* Allocate BIOS */
152 prom_size = 8 * 1024 * 1024; /* 8Mb */
153 memory_region_init_ram(prom, "Leon3.bios", prom_size);
154 vmstate_register_ram_global(prom);
155 memory_region_set_readonly(prom, true);
156 memory_region_add_subregion(address_space_mem, 0x00000000, prom);
157
158 /* Load boot prom */
159 if (bios_name == NULL) {
160 bios_name = PROM_FILENAME;
161 }
162 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
163
164 bios_size = get_image_size(filename);
165
166 if (bios_size > prom_size) {
167 fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
168 filename);
169 exit(1);
170 }
171
172 if (bios_size > 0) {
173 ret = load_image_targphys(filename, 0x00000000, bios_size);
174 if (ret < 0 || ret > prom_size) {
175 fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
176 exit(1);
177 }
178 } else if (kernel_filename == NULL) {
179 fprintf(stderr, "Can't read bios image %s\n", filename);
180 exit(1);
181 }
182
183 /* Can directly load an application. */
184 if (kernel_filename != NULL) {
185 long kernel_size;
186 uint64_t entry;
187
188 kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
189 1 /* big endian */, ELF_MACHINE, 0);
190 if (kernel_size < 0) {
191 fprintf(stderr, "qemu: could not load kernel '%s'\n",
192 kernel_filename);
193 exit(1);
194 }
195 if (bios_size <= 0) {
196 /* If there is no bios/monitor, start the application. */
197 env->pc = entry;
198 env->npc = entry + 4;
199 reset_info->entry = entry;
200 }
201 }
202
203 /* Allocate timers */
204 grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
205
206 /* Allocate uart */
207 if (serial_hds[0]) {
208 grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
209 }
210 }
211
212 static QEMUMachine leon3_generic_machine = {
213 .name = "leon3_generic",
214 .desc = "Leon-3 generic",
215 .init = leon3_generic_hw_init,
216 DEFAULT_MACHINE_OPTIONS,
217 };
218
219 static void leon3_machine_init(void)
220 {
221 qemu_register_machine(&leon3_generic_machine);
222 }
223
224 machine_init(leon3_machine_init);