![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to leon3.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Qemu by Fabrice Bellard] / qemu / hw|
Return to leon3.c CVS log | Up to [Qemu by Fabrice Bellard] / qemu / hw |
1.1 root 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);
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.