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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"
1.1.1.3 ! root 26: #include "ptimer.h"
1.1 root 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"
1.1.1.2 root 33: #include "exec-memory.h"
1.1 root 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 {
1.1.1.3 ! root 45: CPUSPARCState *env;
1.1 root 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;
1.1.1.3 ! root 52: CPUSPARCState *env = s->env;
1.1 root 53:
1.1.1.3 ! root 54: cpu_state_reset(env);
1.1 root 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: {
1.1.1.3 ! root 68: CPUSPARCState *env = (CPUSPARCState *)opaque;
1.1 root 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: {
1.1.1.3 ! root 104: CPUSPARCState *env;
1.1.1.2 root 105: MemoryRegion *address_space_mem = get_system_memory();
106: MemoryRegion *ram = g_new(MemoryRegion, 1);
107: MemoryRegion *prom = g_new(MemoryRegion, 1);
1.1 root 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 */
1.1.1.2 root 129: reset_info = g_malloc0(sizeof(ResetData));
1.1 root 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:
1.1.1.3 ! root 146: memory_region_init_ram(ram, "leon3.ram", ram_size);
! 147: vmstate_register_ram_global(ram);
1.1.1.2 root 148: memory_region_add_subregion(address_space_mem, 0x40000000, ram);
1.1 root 149:
150: /* Allocate BIOS */
151: prom_size = 8 * 1024 * 1024; /* 8Mb */
1.1.1.3 ! root 152: memory_region_init_ram(prom, "Leon3.bios", prom_size);
! 153: vmstate_register_ram_global(prom);
1.1.1.2 root 154: memory_region_set_readonly(prom, true);
155: memory_region_add_subregion(address_space_mem, 0x00000000, prom);
1.1 root 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);
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