linux-user: stack_base is now mandatory on all targets
[qemu.git] / hw / 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.h"
25 #include "qemu-timer.h"
26 #include "ptimer.h"
27 #include "qemu-char.h"
28 #include "sysemu.h"
29 #include "boards.h"
30 #include "loader.h"
31 #include "elf.h"
32 #include "trace.h"
33 #include "exec-memory.h"
34
35 #include "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 CPUState *env;
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 *env = s->env;
53
54 cpu_reset(env);
55
56 env->halted = 0;
57 env->pc = s->entry;
58 env->npc = s->entry + 4;
59 }
60
61 void leon3_irq_ack(void *irq_manager, int intno)
62 {
63 grlib_irqmp_ack((DeviceState *)irq_manager, intno);
64 }
65
66 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
67 {
68 CPUState *env = (CPUState *)opaque;
69
70 assert(env != NULL);
71
72 env->pil_in = pil_in;
73
74 if (env->pil_in && (env->interrupt_index == 0 ||
75 (env->interrupt_index & ~15) == TT_EXTINT)) {
76 unsigned int i;
77
78 for (i = 15; i > 0; i--) {
79 if (env->pil_in & (1 << i)) {
80 int old_interrupt = env->interrupt_index;
81
82 env->interrupt_index = TT_EXTINT | i;
83 if (old_interrupt != env->interrupt_index) {
84 trace_leon3_set_irq(i);
85 cpu_interrupt(env, CPU_INTERRUPT_HARD);
86 }
87 break;
88 }
89 }
90 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
91 trace_leon3_reset_irq(env->interrupt_index & 15);
92 env->interrupt_index = 0;
93 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
94 }
95 }
96
97 static void leon3_generic_hw_init(ram_addr_t ram_size,
98 const char *boot_device,
99 const char *kernel_filename,
100 const char *kernel_cmdline,
101 const char *initrd_filename,
102 const char *cpu_model)
103 {
104 CPUState *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 env = cpu_init(cpu_model);
121 if (!env) {
122 fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
123 exit(1);
124 }
125
126 cpu_sparc_set_id(env, 0);
127
128 /* Reset data */
129 reset_info = g_malloc0(sizeof(ResetData));
130 reset_info->env = env;
131 qemu_register_reset(main_cpu_reset, reset_info);
132
133 /* Allocate IRQ manager */
134 grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
135
136 env->qemu_irq_ack = leon3_irq_manager;
137
138 /* Allocate RAM */
139 if ((uint64_t)ram_size > (1UL << 30)) {
140 fprintf(stderr,
141 "qemu: Too much memory for this machine: %d, maximum 1G\n",
142 (unsigned int)(ram_size / (1024 * 1024)));
143 exit(1);
144 }
145
146 memory_region_init_ram(ram, "leon3.ram", ram_size);
147 vmstate_register_ram_global(ram);
148 memory_region_add_subregion(address_space_mem, 0x40000000, ram);
149
150 /* Allocate BIOS */
151 prom_size = 8 * 1024 * 1024; /* 8Mb */
152 memory_region_init_ram(prom, "Leon3.bios", prom_size);
153 vmstate_register_ram_global(prom);
154 memory_region_set_readonly(prom, true);
155 memory_region_add_subregion(address_space_mem, 0x00000000, prom);
156
157 /* Load boot prom */
158 if (bios_name == NULL) {
159 bios_name = PROM_FILENAME;
160 }
161 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
162
163 bios_size = get_image_size(filename);
164
165 if (bios_size > prom_size) {
166 fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
167 filename);
168 exit(1);
169 }
170
171 if (bios_size > 0) {
172 ret = load_image_targphys(filename, 0x00000000, bios_size);
173 if (ret < 0 || ret > prom_size) {
174 fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
175 exit(1);
176 }
177 } else if (kernel_filename == NULL) {
178 fprintf(stderr, "Can't read bios image %s\n", filename);
179 exit(1);
180 }
181
182 /* Can directly load an application. */
183 if (kernel_filename != NULL) {
184 long kernel_size;
185 uint64_t entry;
186
187 kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
188 1 /* big endian */, ELF_MACHINE, 0);
189 if (kernel_size < 0) {
190 fprintf(stderr, "qemu: could not load kernel '%s'\n",
191 kernel_filename);
192 exit(1);
193 }
194 if (bios_size <= 0) {
195 /* If there is no bios/monitor, start the application. */
196 env->pc = entry;
197 env->npc = entry + 4;
198 reset_info->entry = entry;
199 }
200 }
201
202 /* Allocate timers */
203 grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
204
205 /* Allocate uart */
206 if (serial_hds[0]) {
207 grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
208 }
209 }
210
211 QEMUMachine leon3_generic_machine = {
212 .name = "leon3_generic",
213 .desc = "Leon-3 generic",
214 .init = leon3_generic_hw_init,
215 .use_scsi = 0,
216 };
217
218 static void leon3_machine_init(void)
219 {
220 qemu_register_machine(&leon3_generic_machine);
221 }
222
223 machine_init(leon3_machine_init);