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 * Raspberry Pi 3 emulation Copyright (c) 2018 Zoltán Baldaszti
9 * Upstream code cleanup (c) 2018 Pekka Enberg
11 * This code is licensed under the GNU GPLv2 and later.
14 #include "qemu/osdep.h"
15 #include "qemu/units.h"
16 #include "qapi/error.h"
17 #include "qemu-common.h"
19 #include "hw/arm/bcm2836.h"
20 #include "qemu/error-report.h"
21 #include "hw/boards.h"
22 #include "hw/loader.h"
23 #include "hw/arm/arm.h"
24 #include "sysemu/sysemu.h"
26 #define SMPBOOT_ADDR 0x300 /* this should leave enough space for ATAGS */
27 #define MVBAR_ADDR 0x400 /* secure vectors */
28 #define BOARDSETUP_ADDR (MVBAR_ADDR + 0x20) /* board setup code */
29 #define FIRMWARE_ADDR_2 0x8000 /* Pi 2 loads kernel.img here by default */
30 #define FIRMWARE_ADDR_3 0x80000 /* Pi 3 loads kernel.img here by default */
31 #define SPINTABLE_ADDR 0xd8 /* Pi 3 bootloader spintable */
33 /* Table of Linux board IDs for different Pi versions */
34 static const int raspi_boardid
[] = {[1] = 0xc42, [2] = 0xc43, [3] = 0xc44};
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_smpboot64(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
70 /* Unlike the AArch32 version we don't need to call the board setup hook.
71 * The mechanism for doing the spin-table is also entirely different.
72 * We must have four 64-bit fields at absolute addresses
73 * 0xd8, 0xe0, 0xe8, 0xf0 in RAM, which are the flag variables for
74 * our CPUs, and which we must ensure are zero initialized before
75 * the primary CPU goes into the kernel. We put these variables inside
76 * a rom blob, so that the reset for ROM contents zeroes them for us.
78 static const uint32_t smpboot
[] = {
79 0xd2801b05, /* mov x5, 0xd8 */
80 0xd53800a6, /* mrs x6, mpidr_el1 */
81 0x924004c6, /* and x6, x6, #0x3 */
82 0xd503205f, /* spin: wfe */
83 0xf86678a4, /* ldr x4, [x5,x6,lsl #3] */
84 0xb4ffffc4, /* cbz x4, spin */
85 0xd2800000, /* mov x0, #0x0 */
86 0xd2800001, /* mov x1, #0x0 */
87 0xd2800002, /* mov x2, #0x0 */
88 0xd2800003, /* mov x3, #0x0 */
89 0xd61f0080, /* br x4 */
92 static const uint64_t spintables
[] = {
96 rom_add_blob_fixed("raspi_smpboot", smpboot
, sizeof(smpboot
),
97 info
->smp_loader_start
);
98 rom_add_blob_fixed("raspi_spintables", spintables
, sizeof(spintables
),
102 static void write_board_setup(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
104 arm_write_secure_board_setup_dummy_smc(cpu
, info
, MVBAR_ADDR
);
107 static void reset_secondary(ARMCPU
*cpu
, const struct arm_boot_info
*info
)
109 CPUState
*cs
= CPU(cpu
);
110 cpu_set_pc(cs
, info
->smp_loader_start
);
113 static void setup_boot(MachineState
*machine
, int version
, size_t ram_size
)
115 static struct arm_boot_info binfo
;
118 binfo
.board_id
= raspi_boardid
[version
];
119 binfo
.ram_size
= ram_size
;
120 binfo
.nb_cpus
= smp_cpus
;
123 /* The rpi1 and 2 require some custom setup code to run in Secure
124 * mode before booting a kernel (to set up the SMC vectors so
125 * that we get a no-op SMC; this is used by Linux to call the
126 * firmware for some cache maintenance operations.
127 * The rpi3 doesn't need this.
129 binfo
.board_setup_addr
= BOARDSETUP_ADDR
;
130 binfo
.write_board_setup
= write_board_setup
;
131 binfo
.secure_board_setup
= true;
132 binfo
.secure_boot
= true;
135 /* Pi2 and Pi3 requires SMP setup */
137 binfo
.smp_loader_start
= SMPBOOT_ADDR
;
139 binfo
.write_secondary_boot
= write_smpboot
;
141 binfo
.write_secondary_boot
= write_smpboot64
;
143 binfo
.secondary_cpu_reset_hook
= reset_secondary
;
146 /* If the user specified a "firmware" image (e.g. UEFI), we bypass
147 * the normal Linux boot process
149 if (machine
->firmware
) {
150 hwaddr firmware_addr
= version
== 3 ? FIRMWARE_ADDR_3
: FIRMWARE_ADDR_2
;
151 /* load the firmware image (typically kernel.img) */
152 r
= load_image_targphys(machine
->firmware
, firmware_addr
,
153 ram_size
- firmware_addr
);
155 error_report("Failed to load firmware from %s", machine
->firmware
);
159 binfo
.entry
= firmware_addr
;
160 binfo
.firmware_loaded
= true;
162 binfo
.kernel_filename
= machine
->kernel_filename
;
163 binfo
.kernel_cmdline
= machine
->kernel_cmdline
;
164 binfo
.initrd_filename
= machine
->initrd_filename
;
167 arm_load_kernel(ARM_CPU(first_cpu
), &binfo
);
170 static void raspi_init(MachineState
*machine
, int version
)
172 RasPiState
*s
= g_new0(RasPiState
, 1);
177 DeviceState
*carddev
;
179 if (machine
->ram_size
> 1 * GiB
) {
180 error_report("Requested ram size is too large for this machine: "
185 object_initialize(&s
->soc
, sizeof(s
->soc
),
186 version
== 3 ? TYPE_BCM2837
: TYPE_BCM2836
);
187 object_property_add_child(OBJECT(machine
), "soc", OBJECT(&s
->soc
),
190 /* Allocate and map RAM */
191 memory_region_allocate_system_memory(&s
->ram
, OBJECT(machine
), "ram",
193 /* FIXME: Remove when we have custom CPU address space support */
194 memory_region_add_subregion_overlap(get_system_memory(), 0, &s
->ram
, 0);
197 object_property_add_const_link(OBJECT(&s
->soc
), "ram", OBJECT(&s
->ram
),
199 object_property_set_int(OBJECT(&s
->soc
), smp_cpus
, "enabled-cpus",
201 int board_rev
= version
== 3 ? 0xa02082 : 0xa21041;
202 object_property_set_int(OBJECT(&s
->soc
), board_rev
, "board-rev",
204 object_property_set_bool(OBJECT(&s
->soc
), true, "realized", &error_abort
);
206 /* Create and plug in the SD cards */
207 di
= drive_get_next(IF_SD
);
208 blk
= di
? blk_by_legacy_dinfo(di
) : NULL
;
209 bus
= qdev_get_child_bus(DEVICE(&s
->soc
), "sd-bus");
211 error_report("No SD bus found in SOC object");
214 carddev
= qdev_create(bus
, TYPE_SD_CARD
);
215 qdev_prop_set_drive(carddev
, "drive", blk
, &error_fatal
);
216 object_property_set_bool(OBJECT(carddev
), true, "realized", &error_fatal
);
218 vcram_size
= object_property_get_uint(OBJECT(&s
->soc
), "vcram-size",
220 setup_boot(machine
, version
, machine
->ram_size
- vcram_size
);
223 static void raspi2_init(MachineState
*machine
)
225 raspi_init(machine
, 2);
228 static void raspi2_machine_init(MachineClass
*mc
)
230 mc
->desc
= "Raspberry Pi 2";
231 mc
->init
= raspi2_init
;
232 mc
->block_default_type
= IF_SD
;
236 mc
->max_cpus
= BCM283X_NCPUS
;
237 mc
->min_cpus
= BCM283X_NCPUS
;
238 mc
->default_cpus
= BCM283X_NCPUS
;
239 mc
->default_ram_size
= 1024 * 1024 * 1024;
240 mc
->ignore_memory_transaction_failures
= true;
242 DEFINE_MACHINE("raspi2", raspi2_machine_init
)
244 #ifdef TARGET_AARCH64
245 static void raspi3_init(MachineState
*machine
)
247 raspi_init(machine
, 3);
250 static void raspi3_machine_init(MachineClass
*mc
)
252 mc
->desc
= "Raspberry Pi 3";
253 mc
->init
= raspi3_init
;
254 mc
->block_default_type
= IF_SD
;
258 mc
->max_cpus
= BCM283X_NCPUS
;
259 mc
->min_cpus
= BCM283X_NCPUS
;
260 mc
->default_cpus
= BCM283X_NCPUS
;
261 mc
->default_ram_size
= 1024 * 1024 * 1024;
263 DEFINE_MACHINE("raspi3", raspi3_machine_init
)