2 * QEMU Leon3 System Emulator
4 * Copyright (c) 2010-2011 AdaCore
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
25 #include "qemu/timer.h"
26 #include "hw/ptimer.h"
27 #include "sysemu/char.h"
28 #include "sysemu/sysemu.h"
29 #include "sysemu/qtest.h"
30 #include "hw/boards.h"
31 #include "hw/loader.h"
34 #include "exec/address-spaces.h"
36 #include "hw/sparc/grlib.h"
38 /* Default system clock. */
39 #define CPU_CLK (40 * 1000 * 1000)
41 #define PROM_FILENAME "u-boot.bin"
45 typedef struct ResetData
{
47 uint32_t entry
; /* save kernel entry in case of reset */
50 static void main_cpu_reset(void *opaque
)
52 ResetData
*s
= (ResetData
*)opaque
;
53 CPUState
*cpu
= CPU(s
->cpu
);
54 CPUSPARCState
*env
= &s
->cpu
->env
;
60 env
->npc
= s
->entry
+ 4;
63 void leon3_irq_ack(void *irq_manager
, int intno
)
65 grlib_irqmp_ack((DeviceState
*)irq_manager
, intno
);
68 static void leon3_set_pil_in(void *opaque
, uint32_t pil_in
)
70 CPUSPARCState
*env
= (CPUSPARCState
*)opaque
;
77 if (env
->pil_in
&& (env
->interrupt_index
== 0 ||
78 (env
->interrupt_index
& ~15) == TT_EXTINT
)) {
81 for (i
= 15; i
> 0; i
--) {
82 if (env
->pil_in
& (1 << i
)) {
83 int old_interrupt
= env
->interrupt_index
;
85 env
->interrupt_index
= TT_EXTINT
| i
;
86 if (old_interrupt
!= env
->interrupt_index
) {
87 cs
= CPU(sparc_env_get_cpu(env
));
88 trace_leon3_set_irq(i
);
89 cpu_interrupt(cs
, CPU_INTERRUPT_HARD
);
94 } else if (!env
->pil_in
&& (env
->interrupt_index
& ~15) == TT_EXTINT
) {
95 cs
= CPU(sparc_env_get_cpu(env
));
96 trace_leon3_reset_irq(env
->interrupt_index
& 15);
97 env
->interrupt_index
= 0;
98 cpu_reset_interrupt(cs
, CPU_INTERRUPT_HARD
);
102 static void leon3_generic_hw_init(QEMUMachineInitArgs
*args
)
104 ram_addr_t ram_size
= args
->ram_size
;
105 const char *cpu_model
= args
->cpu_model
;
106 const char *kernel_filename
= args
->kernel_filename
;
109 MemoryRegion
*address_space_mem
= get_system_memory();
110 MemoryRegion
*ram
= g_new(MemoryRegion
, 1);
111 MemoryRegion
*prom
= g_new(MemoryRegion
, 1);
114 qemu_irq
*cpu_irqs
= NULL
;
117 ResetData
*reset_info
;
124 cpu
= cpu_sparc_init(cpu_model
);
126 fprintf(stderr
, "qemu: Unable to find Sparc CPU definition\n");
131 cpu_sparc_set_id(env
, 0);
134 reset_info
= g_malloc0(sizeof(ResetData
));
135 reset_info
->cpu
= cpu
;
136 qemu_register_reset(main_cpu_reset
, reset_info
);
138 /* Allocate IRQ manager */
139 grlib_irqmp_create(0x80000200, env
, &cpu_irqs
, MAX_PILS
, &leon3_set_pil_in
);
141 env
->qemu_irq_ack
= leon3_irq_manager
;
144 if ((uint64_t)ram_size
> (1UL << 30)) {
146 "qemu: Too much memory for this machine: %d, maximum 1G\n",
147 (unsigned int)(ram_size
/ (1024 * 1024)));
151 memory_region_init_ram(ram
, NULL
, "leon3.ram", ram_size
);
152 vmstate_register_ram_global(ram
);
153 memory_region_add_subregion(address_space_mem
, 0x40000000, ram
);
156 prom_size
= 8 * 1024 * 1024; /* 8Mb */
157 memory_region_init_ram(prom
, NULL
, "Leon3.bios", prom_size
);
158 vmstate_register_ram_global(prom
);
159 memory_region_set_readonly(prom
, true);
160 memory_region_add_subregion(address_space_mem
, 0x00000000, prom
);
163 if (bios_name
== NULL
) {
164 bios_name
= PROM_FILENAME
;
166 filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, bios_name
);
168 bios_size
= get_image_size(filename
);
170 if (bios_size
> prom_size
) {
171 fprintf(stderr
, "qemu: could not load prom '%s': file too big\n",
177 ret
= load_image_targphys(filename
, 0x00000000, bios_size
);
178 if (ret
< 0 || ret
> prom_size
) {
179 fprintf(stderr
, "qemu: could not load prom '%s'\n", filename
);
182 } else if (kernel_filename
== NULL
&& !qtest_enabled()) {
183 fprintf(stderr
, "Can't read bios image %s\n", filename
);
187 /* Can directly load an application. */
188 if (kernel_filename
!= NULL
) {
192 kernel_size
= load_elf(kernel_filename
, NULL
, NULL
, &entry
, NULL
, NULL
,
193 1 /* big endian */, ELF_MACHINE
, 0);
194 if (kernel_size
< 0) {
195 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
199 if (bios_size
<= 0) {
200 /* If there is no bios/monitor, start the application. */
202 env
->npc
= entry
+ 4;
203 reset_info
->entry
= entry
;
207 /* Allocate timers */
208 grlib_gptimer_create(0x80000300, 2, CPU_CLK
, cpu_irqs
, 6);
212 grlib_apbuart_create(0x80000100, serial_hds
[0], cpu_irqs
[3]);
216 static QEMUMachine leon3_generic_machine
= {
217 .name
= "leon3_generic",
218 .desc
= "Leon-3 generic",
219 .init
= leon3_generic_hw_init
,
222 static void leon3_machine_init(void)
224 qemu_register_machine(&leon3_generic_machine
);
227 machine_init(leon3_machine_init
);