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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"
1.1.1.2 ! root 32: #include "exec-memory.h"
1.1 root 33:
34: #include "grlib.h"
35:
36: /* Default system clock. */
37: #define CPU_CLK (40 * 1000 * 1000)
38:
39: #define PROM_FILENAME "u-boot.bin"
40:
41: #define MAX_PILS 16
42:
43: typedef struct ResetData {
44: CPUState *env;
45: uint32_t entry; /* save kernel entry in case of reset */
46: } ResetData;
47:
48: static void main_cpu_reset(void *opaque)
49: {
50: ResetData *s = (ResetData *)opaque;
51: CPUState *env = s->env;
52:
53: cpu_reset(env);
54:
55: env->halted = 0;
56: env->pc = s->entry;
57: env->npc = s->entry + 4;
58: }
59:
60: void leon3_irq_ack(void *irq_manager, int intno)
61: {
62: grlib_irqmp_ack((DeviceState *)irq_manager, intno);
63: }
64:
65: static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
66: {
67: CPUState *env = (CPUState *)opaque;
68:
69: assert(env != NULL);
70:
71: env->pil_in = pil_in;
72:
73: if (env->pil_in && (env->interrupt_index == 0 ||
74: (env->interrupt_index & ~15) == TT_EXTINT)) {
75: unsigned int i;
76:
77: for (i = 15; i > 0; i--) {
78: if (env->pil_in & (1 << i)) {
79: int old_interrupt = env->interrupt_index;
80:
81: env->interrupt_index = TT_EXTINT | i;
82: if (old_interrupt != env->interrupt_index) {
83: trace_leon3_set_irq(i);
84: cpu_interrupt(env, CPU_INTERRUPT_HARD);
85: }
86: break;
87: }
88: }
89: } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
90: trace_leon3_reset_irq(env->interrupt_index & 15);
91: env->interrupt_index = 0;
92: cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
93: }
94: }
95:
96: static void leon3_generic_hw_init(ram_addr_t ram_size,
97: const char *boot_device,
98: const char *kernel_filename,
99: const char *kernel_cmdline,
100: const char *initrd_filename,
101: const char *cpu_model)
102: {
103: CPUState *env;
1.1.1.2 ! root 104: MemoryRegion *address_space_mem = get_system_memory();
! 105: MemoryRegion *ram = g_new(MemoryRegion, 1);
! 106: MemoryRegion *prom = g_new(MemoryRegion, 1);
1.1 root 107: int ret;
108: char *filename;
109: qemu_irq *cpu_irqs = NULL;
110: int bios_size;
111: int prom_size;
112: ResetData *reset_info;
113:
114: /* Init CPU */
115: if (!cpu_model) {
116: cpu_model = "LEON3";
117: }
118:
119: env = cpu_init(cpu_model);
120: if (!env) {
121: fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
122: exit(1);
123: }
124:
125: cpu_sparc_set_id(env, 0);
126:
127: /* Reset data */
1.1.1.2 ! root 128: reset_info = g_malloc0(sizeof(ResetData));
1.1 root 129: reset_info->env = env;
130: qemu_register_reset(main_cpu_reset, reset_info);
131:
132: /* Allocate IRQ manager */
133: grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
134:
135: env->qemu_irq_ack = leon3_irq_manager;
136:
137: /* Allocate RAM */
138: if ((uint64_t)ram_size > (1UL << 30)) {
139: fprintf(stderr,
140: "qemu: Too much memory for this machine: %d, maximum 1G\n",
141: (unsigned int)(ram_size / (1024 * 1024)));
142: exit(1);
143: }
144:
1.1.1.2 ! root 145: memory_region_init_ram(ram, NULL, "leon3.ram", ram_size);
! 146: memory_region_add_subregion(address_space_mem, 0x40000000, ram);
1.1 root 147:
148: /* Allocate BIOS */
149: prom_size = 8 * 1024 * 1024; /* 8Mb */
1.1.1.2 ! root 150: memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size);
! 151: memory_region_set_readonly(prom, true);
! 152: memory_region_add_subregion(address_space_mem, 0x00000000, prom);
1.1 root 153:
154: /* Load boot prom */
155: if (bios_name == NULL) {
156: bios_name = PROM_FILENAME;
157: }
158: filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
159:
160: bios_size = get_image_size(filename);
161:
162: if (bios_size > prom_size) {
163: fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
164: filename);
165: exit(1);
166: }
167:
168: if (bios_size > 0) {
169: ret = load_image_targphys(filename, 0x00000000, bios_size);
170: if (ret < 0 || ret > prom_size) {
171: fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
172: exit(1);
173: }
174: } else if (kernel_filename == NULL) {
175: fprintf(stderr, "Can't read bios image %s\n", filename);
176: exit(1);
177: }
178:
179: /* Can directly load an application. */
180: if (kernel_filename != NULL) {
181: long kernel_size;
182: uint64_t entry;
183:
184: kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
185: 1 /* big endian */, ELF_MACHINE, 0);
186: if (kernel_size < 0) {
187: fprintf(stderr, "qemu: could not load kernel '%s'\n",
188: kernel_filename);
189: exit(1);
190: }
191: if (bios_size <= 0) {
192: /* If there is no bios/monitor, start the application. */
193: env->pc = entry;
194: env->npc = entry + 4;
195: reset_info->entry = entry;
196: }
197: }
198:
199: /* Allocate timers */
200: grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
201:
202: /* Allocate uart */
203: if (serial_hds[0]) {
204: grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
205: }
206: }
207:
208: QEMUMachine leon3_generic_machine = {
209: .name = "leon3_generic",
210: .desc = "Leon-3 generic",
211: .init = leon3_generic_hw_init,
212: .use_scsi = 0,
213: };
214:
215: static void leon3_machine_init(void)
216: {
217: qemu_register_machine(&leon3_generic_machine);
218: }
219:
220: machine_init(leon3_machine_init);
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