2 * Raspberry Pi emulation (c) 2012 Gregory Estrade
3 * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
5 * Rasperry Pi 2 emulation Copyright (c) 2015, Microsoft
6 * Written by Andrew Baumann
8 * This code is licensed under the GNU GPLv2 and later.
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
13 #include "qemu-common.h"
15 #include "hw/arm/bcm2835.h"
16 #include "hw/arm/bcm2836.h"
17 #include "qemu/error-report.h"
18 #include "hw/boards.h"
19 #include "hw/loader.h"
20 #include "hw/arm/arm.h"
21 #include "sysemu/sysemu.h"
23 #define SMPBOOT_ADDR 0x300 /* this should leave enough space for ATAGS */
24 #define MVBAR_ADDR 0x400 /* secure vectors */
25 #define BOARDSETUP_ADDR (MVBAR_ADDR + 0x20) /* board setup code */
26 #define FIRMWARE_ADDR 0x8000 /* Pi loads kernel.img here by default */
28 /* Table of Linux board IDs for different Pi versions */
29 static const int raspi_boardid
[] = {[1] = 0xc42, [2] = 0xc43};
31 /* Table of board revisions
32 * https://github.com/AndrewFromMelbourne/raspberry_pi_revision/blob/master/README.md
34 static const uint32_t raspi_boardrev
[] = {[1] = 0x10, [2] = 0xa21041};
36 typedef struct RasPiState
{
41 static void write_smpboot(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
43 static const uint32_t smpboot
[] = {
44 0xe1a0e00f, /* mov lr, pc */
45 0xe3a0fe00 + (BOARDSETUP_ADDR
>> 4), /* mov pc, BOARDSETUP_ADDR */
46 0xee100fb0, /* mrc p15, 0, r0, c0, c0, 5;get core ID */
47 0xe7e10050, /* ubfx r0, r0, #0, #2 ;extract LSB */
48 0xe59f5014, /* ldr r5, =0x400000CC ;load mbox base */
49 0xe320f001, /* 1: yield */
50 0xe7953200, /* ldr r3, [r5, r0, lsl #4] ;read mbox for our core*/
51 0xe3530000, /* cmp r3, #0 ;spin while zero */
52 0x0afffffb, /* beq 1b */
53 0xe7853200, /* str r3, [r5, r0, lsl #4] ;clear mbox */
54 0xe12fff13, /* bx r3 ;jump to target */
55 0x400000cc, /* (constant: mailbox 3 read/clear base) */
58 /* check that we don't overrun board setup vectors */
59 QEMU_BUILD_BUG_ON(SMPBOOT_ADDR
+ sizeof(smpboot
) > MVBAR_ADDR
);
60 /* check that board setup address is correctly relocated */
61 QEMU_BUILD_BUG_ON((BOARDSETUP_ADDR
& 0xf) != 0
62 || (BOARDSETUP_ADDR
>> 4) >= 0x100);
64 rom_add_blob_fixed("raspi_smpboot", smpboot
, sizeof(smpboot
),
65 info
->smp_loader_start
);
68 static void write_board_setup(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
70 arm_write_secure_board_setup_dummy_smc(cpu
, info
, MVBAR_ADDR
);
73 static void reset_secondary(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
75 CPUState
*cs
= CPU(cpu
);
76 cpu_set_pc(cs
, info
->smp_loader_start
);
79 static void setup_boot(MachineState
*machine
, int version
, size_t ram_size
)
81 static struct arm_boot_info binfo
;
84 binfo
.board_id
= raspi_boardid
[version
];
85 binfo
.ram_size
= ram_size
;
86 binfo
.nb_cpus
= smp_cpus
;
87 binfo
.board_setup_addr
= BOARDSETUP_ADDR
;
88 binfo
.write_board_setup
= write_board_setup
;
89 binfo
.secure_board_setup
= true;
90 binfo
.secure_boot
= true;
92 /* Pi2 requires SMP setup */
94 binfo
.smp_loader_start
= SMPBOOT_ADDR
;
95 binfo
.write_secondary_boot
= write_smpboot
;
96 binfo
.secondary_cpu_reset_hook
= reset_secondary
;
99 /* If the user specified a "firmware" image (e.g. UEFI), we bypass
100 * the normal Linux boot process
102 if (machine
->firmware
) {
103 /* load the firmware image (typically kernel.img) */
104 r
= load_image_targphys(machine
->firmware
, FIRMWARE_ADDR
,
105 ram_size
- FIRMWARE_ADDR
);
107 error_report("Failed to load firmware from %s", machine
->firmware
);
111 binfo
.entry
= FIRMWARE_ADDR
;
112 binfo
.firmware_loaded
= true;
114 binfo
.kernel_filename
= machine
->kernel_filename
;
115 binfo
.kernel_cmdline
= machine
->kernel_cmdline
;
116 binfo
.initrd_filename
= machine
->initrd_filename
;
119 arm_load_kernel(ARM_CPU(first_cpu
), &binfo
);
122 static void raspi_machine_init(MachineState
*machine
, int version
,
123 const char *soc_type
)
125 RasPiState
*s
= g_new0(RasPiState
, 1);
130 DeviceState
*carddev
;
132 /* Initialise the relevant SOC */
133 s
->soc
= object_new(soc_type
);
134 object_property_add_child(OBJECT(machine
), "soc", s
->soc
, &error_abort
);
136 /* Allocate and map RAM */
137 memory_region_allocate_system_memory(&s
->ram
, OBJECT(machine
), "ram",
139 /* FIXME: Remove when we have custom CPU address space support */
140 memory_region_add_subregion_overlap(get_system_memory(), 0, &s
->ram
, 0);
143 object_property_add_const_link(s
->soc
, "ram", OBJECT(&s
->ram
),
146 object_property_set_int(s
->soc
, raspi_boardrev
[version
], "board-rev",
150 object_property_set_int(s
->soc
, smp_cpus
, "enabled-cpus", &error_abort
);
153 object_property_set_bool(s
->soc
, true, "realized", &error_abort
);
155 /* Create and plug in the SD cards */
156 di
= drive_get_next(IF_SD
);
157 blk
= di
? blk_by_legacy_dinfo(di
) : NULL
;
158 bus
= qdev_get_child_bus(DEVICE(s
->soc
), "sd-bus");
160 error_report("No SD bus found in SOC object");
163 carddev
= qdev_create(bus
, TYPE_SD_CARD
);
164 qdev_prop_set_drive(carddev
, "drive", blk
, &error_fatal
);
165 object_property_set_bool(OBJECT(carddev
), true, "realized", &error_fatal
);
167 vcram_size
= object_property_get_uint(OBJECT(&s
->soc
), "vcram-size",
169 setup_boot(machine
, 2, machine
->ram_size
- vcram_size
);
172 static void raspi1_init(MachineState
*machine
)
174 raspi_machine_init(machine
, 1, TYPE_BCM2835
);
177 static void raspi2_init(MachineState
*machine
)
179 raspi_machine_init(machine
, 2, TYPE_BCM2836
);
182 static void raspi1_machine_init(MachineClass
*mc
)
184 mc
->desc
= "Raspberry Pi";
185 mc
->init
= raspi1_init
;
186 mc
->block_default_type
= IF_SD
;
190 mc
->default_ram_size
= 512 * 1024 * 1024;
192 DEFINE_MACHINE("raspi", raspi1_machine_init
)
194 static void raspi2_machine_init(MachineClass
*mc
)
196 raspi1_machine_init(mc
);
197 mc
->desc
= "Raspberry Pi 2";
198 mc
->init
= raspi2_init
;
199 mc
->max_cpus
= BCM2836_NCPUS
;
200 mc
->default_ram_size
= 1024 * 1024 * 1024;
202 DEFINE_MACHINE("raspi2", raspi2_machine_init
)