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 "qemu-char.h"
35 /* Default system clock. */
36 #define CPU_CLK (40 * 1000 * 1000)
38 #define PROM_FILENAME "u-boot.bin"
42 typedef struct ResetData
{
44 uint32_t entry
; /* save kernel entry in case of reset */
47 static void main_cpu_reset(void *opaque
)
49 ResetData
*s
= (ResetData
*)opaque
;
50 CPUState
*env
= s
->env
;
56 env
->npc
= s
->entry
+ 4;
59 static void leon3_irq_ack(void *irq_manager
, int intno
)
61 grlib_irqmp_ack((DeviceState
*)irq_manager
, intno
);
62 leon3_cache_control_int();
65 static void leon3_set_pil_in(void *opaque
, uint32_t pil_in
)
67 CPUState
*env
= (CPUState
*)opaque
;
73 if (env
->pil_in
&& (env
->interrupt_index
== 0 ||
74 (env
->interrupt_index
& ~15) == TT_EXTINT
)) {
77 for (i
= 15; i
> 0; i
--) {
78 if (env
->pil_in
& (1 << i
)) {
79 int old_interrupt
= env
->interrupt_index
;
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
);
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
);
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
)
104 ram_addr_t ram_offset
, prom_offset
;
107 qemu_irq
*cpu_irqs
= NULL
;
110 ResetData
*reset_info
;
117 env
= cpu_init(cpu_model
);
119 fprintf(stderr
, "qemu: Unable to find Sparc CPU definition\n");
123 cpu_sparc_set_id(env
, 0);
126 reset_info
= qemu_mallocz(sizeof(ResetData
));
127 reset_info
->env
= env
;
128 qemu_register_reset(main_cpu_reset
, reset_info
);
130 /* Allocate IRQ manager */
131 grlib_irqmp_create(0x80000200, env
, &cpu_irqs
, MAX_PILS
, &leon3_set_pil_in
);
133 env
->qemu_irq_ack
= leon3_irq_ack
;
136 if ((uint64_t)ram_size
> (1UL << 30)) {
138 "qemu: Too much memory for this machine: %d, maximum 1G\n",
139 (unsigned int)(ram_size
/ (1024 * 1024)));
143 ram_offset
= qemu_ram_alloc(NULL
, "leon3.ram", ram_size
);
144 cpu_register_physical_memory(0x40000000, ram_size
, ram_offset
| IO_MEM_RAM
);
147 prom_size
= 8 * 1024 * 1024; /* 8Mb */
148 prom_offset
= qemu_ram_alloc(NULL
, "Leon3.bios", prom_size
);
149 cpu_register_physical_memory(0x00000000, prom_size
,
150 prom_offset
| IO_MEM_ROM
);
153 if (bios_name
== NULL
) {
154 bios_name
= PROM_FILENAME
;
156 filename
= qemu_find_file(QEMU_FILE_TYPE_BIOS
, bios_name
);
158 bios_size
= get_image_size(filename
);
160 if (bios_size
> prom_size
) {
161 fprintf(stderr
, "qemu: could not load prom '%s': file too big\n",
167 ret
= load_image_targphys(filename
, 0x00000000, bios_size
);
168 if (ret
< 0 || ret
> prom_size
) {
169 fprintf(stderr
, "qemu: could not load prom '%s'\n", filename
);
172 } else if (kernel_filename
== NULL
) {
173 fprintf(stderr
, "Can't read bios image %s\n", filename
);
177 /* Can directly load an application. */
178 if (kernel_filename
!= NULL
) {
182 kernel_size
= load_elf(kernel_filename
, NULL
, NULL
, &entry
, NULL
, NULL
,
183 1 /* big endian */, ELF_MACHINE
, 0);
184 if (kernel_size
< 0) {
185 fprintf(stderr
, "qemu: could not load kernel '%s'\n",
189 if (bios_size
<= 0) {
190 /* If there is no bios/monitor, start the application. */
192 env
->npc
= entry
+ 4;
193 reset_info
->entry
= entry
;
197 /* Allocate timers */
198 grlib_gptimer_create(0x80000300, 2, CPU_CLK
, cpu_irqs
, 6);
202 grlib_apbuart_create(0x80000100, serial_hds
[0], cpu_irqs
[3]);
206 QEMUMachine leon3_generic_machine
= {
207 .name
= "leon3_generic",
208 .desc
= "Leon-3 generic",
209 .init
= leon3_generic_hw_init
,
213 static void leon3_machine_init(void)
215 qemu_register_machine(&leon3_generic_machine
);
218 machine_init(leon3_machine_init
);