1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Raspberry Pi emulation (c) 2012 Gregory Estrade
* Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous
*
* Rasperry Pi 2 emulation Copyright (c) 2015, Microsoft
* Written by Andrew Baumann
*
* This code is licensed under the GNU GPLv2 and later.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/arm/bcm2836.h"
#include "qemu/error-report.h"
#include "hw/boards.h"
#include "hw/loader.h"
#include "hw/arm/arm.h"
#include "sysemu/sysemu.h"
#define SMPBOOT_ADDR 0x300 /* this should leave enough space for ATAGS */
#define MVBAR_ADDR 0x400 /* secure vectors */
#define BOARDSETUP_ADDR (MVBAR_ADDR + 0x20) /* board setup code */
#define FIRMWARE_ADDR 0x8000 /* Pi loads kernel.img here by default */
/* Table of Linux board IDs for different Pi versions */
static const int raspi_boardid[] = {[1] = 0xc42, [2] = 0xc43};
typedef struct RasPiState {
BCM2836State soc;
MemoryRegion ram;
} RasPiState;
static void write_smpboot(ARMCPU *cpu, const struct arm_boot_info *info)
{
static const uint32_t smpboot[] = {
0xe1a0e00f, /* mov lr, pc */
0xe3a0fe00 + (BOARDSETUP_ADDR >> 4), /* mov pc, BOARDSETUP_ADDR */
0xee100fb0, /* mrc p15, 0, r0, c0, c0, 5;get core ID */
0xe7e10050, /* ubfx r0, r0, #0, #2 ;extract LSB */
0xe59f5014, /* ldr r5, =0x400000CC ;load mbox base */
0xe320f001, /* 1: yield */
0xe7953200, /* ldr r3, [r5, r0, lsl #4] ;read mbox for our core*/
0xe3530000, /* cmp r3, #0 ;spin while zero */
0x0afffffb, /* beq 1b */
0xe7853200, /* str r3, [r5, r0, lsl #4] ;clear mbox */
0xe12fff13, /* bx r3 ;jump to target */
0x400000cc, /* (constant: mailbox 3 read/clear base) */
};
/* check that we don't overrun board setup vectors */
QEMU_BUILD_BUG_ON(SMPBOOT_ADDR + sizeof(smpboot) > MVBAR_ADDR);
/* check that board setup address is correctly relocated */
QEMU_BUILD_BUG_ON((BOARDSETUP_ADDR & 0xf) != 0
|| (BOARDSETUP_ADDR >> 4) >= 0x100);
rom_add_blob_fixed("raspi_smpboot", smpboot, sizeof(smpboot),
info->smp_loader_start);
}
static void write_board_setup(ARMCPU *cpu, const struct arm_boot_info *info)
{
arm_write_secure_board_setup_dummy_smc(cpu, info, MVBAR_ADDR);
}
static void reset_secondary(ARMCPU *cpu, const struct arm_boot_info *info)
{
CPUState *cs = CPU(cpu);
cpu_set_pc(cs, info->smp_loader_start);
}
static void setup_boot(MachineState *machine, int version, size_t ram_size)
{
static struct arm_boot_info binfo;
int r;
binfo.board_id = raspi_boardid[version];
binfo.ram_size = ram_size;
binfo.nb_cpus = smp_cpus;
binfo.board_setup_addr = BOARDSETUP_ADDR;
binfo.write_board_setup = write_board_setup;
binfo.secure_board_setup = true;
binfo.secure_boot = true;
/* Pi2 requires SMP setup */
if (version == 2) {
binfo.smp_loader_start = SMPBOOT_ADDR;
binfo.write_secondary_boot = write_smpboot;
binfo.secondary_cpu_reset_hook = reset_secondary;
}
/* If the user specified a "firmware" image (e.g. UEFI), we bypass
* the normal Linux boot process
*/
if (machine->firmware) {
/* load the firmware image (typically kernel.img) */
r = load_image_targphys(machine->firmware, FIRMWARE_ADDR,
ram_size - FIRMWARE_ADDR);
if (r < 0) {
error_report("Failed to load firmware from %s", machine->firmware);
exit(1);
}
binfo.entry = FIRMWARE_ADDR;
binfo.firmware_loaded = true;
} else {
binfo.kernel_filename = machine->kernel_filename;
binfo.kernel_cmdline = machine->kernel_cmdline;
binfo.initrd_filename = machine->initrd_filename;
}
arm_load_kernel(ARM_CPU(first_cpu), &binfo);
}
static void raspi2_init(MachineState *machine)
{
RasPiState *s = g_new0(RasPiState, 1);
uint32_t vcram_size;
DriveInfo *di;
BlockBackend *blk;
BusState *bus;
DeviceState *carddev;
object_initialize(&s->soc, sizeof(s->soc), TYPE_BCM2836);
object_property_add_child(OBJECT(machine), "soc", OBJECT(&s->soc),
&error_abort);
/* Allocate and map RAM */
memory_region_allocate_system_memory(&s->ram, OBJECT(machine), "ram",
machine->ram_size);
/* FIXME: Remove when we have custom CPU address space support */
memory_region_add_subregion_overlap(get_system_memory(), 0, &s->ram, 0);
/* Setup the SOC */
object_property_add_const_link(OBJECT(&s->soc), "ram", OBJECT(&s->ram),
&error_abort);
object_property_set_int(OBJECT(&s->soc), smp_cpus, "enabled-cpus",
&error_abort);
object_property_set_int(OBJECT(&s->soc), 0xa21041, "board-rev",
&error_abort);
object_property_set_bool(OBJECT(&s->soc), true, "realized", &error_abort);
/* Create and plug in the SD cards */
di = drive_get_next(IF_SD);
blk = di ? blk_by_legacy_dinfo(di) : NULL;
bus = qdev_get_child_bus(DEVICE(&s->soc), "sd-bus");
if (bus == NULL) {
error_report("No SD bus found in SOC object");
exit(1);
}
carddev = qdev_create(bus, TYPE_SD_CARD);
qdev_prop_set_drive(carddev, "drive", blk, &error_fatal);
object_property_set_bool(OBJECT(carddev), true, "realized", &error_fatal);
vcram_size = object_property_get_uint(OBJECT(&s->soc), "vcram-size",
&error_abort);
setup_boot(machine, 2, machine->ram_size - vcram_size);
}
static void raspi2_machine_init(MachineClass *mc)
{
mc->desc = "Raspberry Pi 2";
mc->init = raspi2_init;
mc->block_default_type = IF_SD;
mc->no_parallel = 1;
mc->no_floppy = 1;
mc->no_cdrom = 1;
mc->max_cpus = BCM2836_NCPUS;
mc->default_ram_size = 1024 * 1024 * 1024;
mc->ignore_memory_transaction_failures = true;
};
DEFINE_MACHINE("raspi2", raspi2_machine_init)
|
