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68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored Jun 24, 2011
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 "qemu-char.h"
27 #include "sysemu.h"
28 #include "boards.h"
29 #include "loader.h"
30 #include "elf.h"
31 #include "trace.h"
32
33 #include "grlib.h"
34
35 /* Default system clock. */
36 #define CPU_CLK (40 * 1000 * 1000)
37
38 #define PROM_FILENAME "u-boot.bin"
39
40 #define MAX_PILS 16
41
42 typedef struct ResetData {
43 CPUState *env;
44 uint32_t entry; /* save kernel entry in case of reset */
45 } ResetData;
46
47 static void main_cpu_reset(void *opaque)
48 {
49 ResetData *s = (ResetData *)opaque;
50 CPUState *env = s->env;
51
52 cpu_reset(env);
53
54 env->halted = 0;
55 env->pc = s->entry;
56 env->npc = s->entry + 4;
57 }
58
59 void leon3_irq_ack(void *irq_manager, int intno)
60 {
61 grlib_irqmp_ack((DeviceState *)irq_manager, intno);
62 }
63
64 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
65 {
66 CPUState *env = (CPUState *)opaque;
67
68 assert(env != NULL);
69
70 env->pil_in = pil_in;
71
72 if (env->pil_in && (env->interrupt_index == 0 ||
73 (env->interrupt_index & ~15) == TT_EXTINT)) {
74 unsigned int i;
75
76 for (i = 15; i > 0; i--) {
77 if (env->pil_in & (1 << i)) {
78 int old_interrupt = env->interrupt_index;
79
80 env->interrupt_index = TT_EXTINT | i;
81 if (old_interrupt != env->interrupt_index) {
82 trace_leon3_set_irq(i);
83 cpu_interrupt(env, CPU_INTERRUPT_HARD);
84 }
85 break;
86 }
87 }
88 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
89 trace_leon3_reset_irq(env->interrupt_index & 15);
90 env->interrupt_index = 0;
91 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
92 }
93 }
94
95 static void leon3_generic_hw_init(ram_addr_t ram_size,
96 const char *boot_device,
97 const char *kernel_filename,
98 const char *kernel_cmdline,
99 const char *initrd_filename,
100 const char *cpu_model)
101 {
102 CPUState *env;
103 ram_addr_t ram_offset, prom_offset;
104 int ret;
105 char *filename;
106 qemu_irq *cpu_irqs = NULL;
107 int bios_size;
108 int prom_size;
109 ResetData *reset_info;
110
111 /* Init CPU */
112 if (!cpu_model) {
113 cpu_model = "LEON3";
114 }
115
116 env = cpu_init(cpu_model);
117 if (!env) {
118 fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
119 exit(1);
120 }
121
122 cpu_sparc_set_id(env, 0);
123
124 /* Reset data */
125 reset_info = qemu_mallocz(sizeof(ResetData));
126 reset_info->env = env;
127 qemu_register_reset(main_cpu_reset, reset_info);
128
129 /* Allocate IRQ manager */
130 grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
131
132 env->qemu_irq_ack = leon3_irq_manager;
133
134 /* Allocate RAM */
135 if ((uint64_t)ram_size > (1UL << 30)) {
136 fprintf(stderr,
137 "qemu: Too much memory for this machine: %d, maximum 1G\n",
138 (unsigned int)(ram_size / (1024 * 1024)));
139 exit(1);
140 }
141
142 ram_offset = qemu_ram_alloc(NULL, "leon3.ram", ram_size);
143 cpu_register_physical_memory(0x40000000, ram_size, ram_offset | IO_MEM_RAM);
144
145 /* Allocate BIOS */
146 prom_size = 8 * 1024 * 1024; /* 8Mb */
147 prom_offset = qemu_ram_alloc(NULL, "Leon3.bios", prom_size);
148 cpu_register_physical_memory(0x00000000, prom_size,
149 prom_offset | IO_MEM_ROM);
150
151 /* Load boot prom */
152 if (bios_name == NULL) {
153 bios_name = PROM_FILENAME;
154 }
155 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
156
157 bios_size = get_image_size(filename);
158
159 if (bios_size > prom_size) {
160 fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
161 filename);
162 exit(1);
163 }
164
165 if (bios_size > 0) {
166 ret = load_image_targphys(filename, 0x00000000, bios_size);
167 if (ret < 0 || ret > prom_size) {
168 fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
169 exit(1);
170 }
171 } else if (kernel_filename == NULL) {
172 fprintf(stderr, "Can't read bios image %s\n", filename);
173 exit(1);
174 }
175
176 /* Can directly load an application. */
177 if (kernel_filename != NULL) {
178 long kernel_size;
179 uint64_t entry;
180
181 kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
182 1 /* big endian */, ELF_MACHINE, 0);
183 if (kernel_size < 0) {
184 fprintf(stderr, "qemu: could not load kernel '%s'\n",
185 kernel_filename);
186 exit(1);
187 }
188 if (bios_size <= 0) {
189 /* If there is no bios/monitor, start the application. */
190 env->pc = entry;
191 env->npc = entry + 4;
192 reset_info->entry = entry;
193 }
194 }
195
196 /* Allocate timers */
197 grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
198
199 /* Allocate uart */
200 if (serial_hds[0]) {
201 grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
202 }
203 }
204
205 QEMUMachine leon3_generic_machine = {
206 .name = "leon3_generic",
207 .desc = "Leon-3 generic",
208 .init = leon3_generic_hw_init,
209 .use_scsi = 0,
210 };
211
212 static void leon3_machine_init(void)
213 {
214 qemu_register_machine(&leon3_generic_machine);
215 }
216
217 machine_init(leon3_machine_init);
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