Merge remote-tracking branch 'remotes/philmd-gitlab/tags/renesas-20201027' into staging
[qemu.git] / hw / mips / r4k.c
1 /*
2 * QEMU/MIPS pseudo-board
3 *
4 * emulates a simple machine with ISA-like bus.
5 * ISA IO space mapped to the 0x14000000 (PHYS) and
6 * ISA memory at the 0x10000000 (PHYS, 16Mb in size).
7 * All peripherial devices are attached to this "bus" with
8 * the standard PC ISA addresses.
9 */
10
11 #include "qemu/osdep.h"
12 #include "qemu/units.h"
13 #include "qapi/error.h"
14 #include "qemu-common.h"
15 #include "cpu.h"
16 #include "hw/clock.h"
17 #include "hw/mips/mips.h"
18 #include "hw/mips/cpudevs.h"
19 #include "hw/intc/i8259.h"
20 #include "hw/char/serial.h"
21 #include "hw/isa/isa.h"
22 #include "net/net.h"
23 #include "hw/net/ne2000-isa.h"
24 #include "sysemu/sysemu.h"
25 #include "hw/boards.h"
26 #include "hw/block/flash.h"
27 #include "qemu/log.h"
28 #include "hw/mips/bios.h"
29 #include "hw/ide.h"
30 #include "hw/ide/internal.h"
31 #include "hw/loader.h"
32 #include "elf.h"
33 #include "hw/rtc/mc146818rtc.h"
34 #include "hw/input/i8042.h"
35 #include "hw/timer/i8254.h"
36 #include "exec/address-spaces.h"
37 #include "sysemu/qtest.h"
38 #include "sysemu/reset.h"
39 #include "sysemu/runstate.h"
40 #include "qemu/error-report.h"
41
42 #define MAX_IDE_BUS 2
43
44 static const int ide_iobase[2] = { 0x1f0, 0x170 };
45 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
46 static const int ide_irq[2] = { 14, 15 };
47
48 static ISADevice *pit; /* PIT i8254 */
49
50 /* i8254 PIT is attached to the IRQ0 at PIC i8259 */
51
52 static struct _loaderparams {
53 int ram_size;
54 const char *kernel_filename;
55 const char *kernel_cmdline;
56 const char *initrd_filename;
57 } loaderparams;
58
59 static void mips_qemu_write(void *opaque, hwaddr addr,
60 uint64_t val, unsigned size)
61 {
62 if ((addr & 0xffff) == 0 && val == 42) {
63 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
64 } else if ((addr & 0xffff) == 4 && val == 42) {
65 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
66 }
67 }
68
69 static uint64_t mips_qemu_read(void *opaque, hwaddr addr,
70 unsigned size)
71 {
72 return 0;
73 }
74
75 static const MemoryRegionOps mips_qemu_ops = {
76 .read = mips_qemu_read,
77 .write = mips_qemu_write,
78 .endianness = DEVICE_NATIVE_ENDIAN,
79 };
80
81 typedef struct ResetData {
82 MIPSCPU *cpu;
83 uint64_t vector;
84 } ResetData;
85
86 static int64_t load_kernel(void)
87 {
88 const size_t params_size = 264;
89 int64_t entry, kernel_high, initrd_size;
90 long kernel_size;
91 ram_addr_t initrd_offset;
92 uint32_t *params_buf;
93 int big_endian;
94
95 #ifdef TARGET_WORDS_BIGENDIAN
96 big_endian = 1;
97 #else
98 big_endian = 0;
99 #endif
100 kernel_size = load_elf(loaderparams.kernel_filename, NULL,
101 cpu_mips_kseg0_to_phys, NULL,
102 (uint64_t *)&entry, NULL,
103 (uint64_t *)&kernel_high, NULL, big_endian,
104 EM_MIPS, 1, 0);
105 if (kernel_size < 0) {
106 error_report("could not load kernel '%s': %s",
107 loaderparams.kernel_filename,
108 load_elf_strerror(kernel_size));
109 exit(1);
110 }
111
112 /* load initrd */
113 initrd_size = 0;
114 initrd_offset = 0;
115 if (loaderparams.initrd_filename) {
116 initrd_size = get_image_size(loaderparams.initrd_filename);
117 if (initrd_size > 0) {
118 initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
119 if (initrd_offset + initrd_size > ram_size) {
120 error_report("memory too small for initial ram disk '%s'",
121 loaderparams.initrd_filename);
122 exit(1);
123 }
124 initrd_size = load_image_targphys(loaderparams.initrd_filename,
125 initrd_offset,
126 ram_size - initrd_offset);
127 }
128 if (initrd_size == (target_ulong) -1) {
129 error_report("could not load initial ram disk '%s'",
130 loaderparams.initrd_filename);
131 exit(1);
132 }
133 }
134
135 /* Store command line. */
136 params_buf = g_malloc(params_size);
137
138 params_buf[0] = tswap32(ram_size);
139 params_buf[1] = tswap32(0x12345678);
140
141 if (initrd_size > 0) {
142 snprintf((char *)params_buf + 8, 256,
143 "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s",
144 cpu_mips_phys_to_kseg0(NULL, initrd_offset),
145 initrd_size, loaderparams.kernel_cmdline);
146 } else {
147 snprintf((char *)params_buf + 8, 256,
148 "%s", loaderparams.kernel_cmdline);
149 }
150
151 rom_add_blob_fixed("params", params_buf, params_size,
152 16 * MiB - params_size);
153
154 g_free(params_buf);
155 return entry;
156 }
157
158 static void main_cpu_reset(void *opaque)
159 {
160 ResetData *s = (ResetData *)opaque;
161 CPUMIPSState *env = &s->cpu->env;
162
163 cpu_reset(CPU(s->cpu));
164 env->active_tc.PC = s->vector;
165 }
166
167 static const int sector_len = 32 * KiB;
168 static
169 void mips_r4k_init(MachineState *machine)
170 {
171 const char *kernel_filename = machine->kernel_filename;
172 const char *kernel_cmdline = machine->kernel_cmdline;
173 const char *initrd_filename = machine->initrd_filename;
174 char *filename;
175 MemoryRegion *address_space_mem = get_system_memory();
176 MemoryRegion *bios;
177 MemoryRegion *iomem = g_new(MemoryRegion, 1);
178 MemoryRegion *isa_io = g_new(MemoryRegion, 1);
179 MemoryRegion *isa_mem = g_new(MemoryRegion, 1);
180 int bios_size;
181 Clock *cpuclk;
182 MIPSCPU *cpu;
183 CPUMIPSState *env;
184 ResetData *reset_info;
185 int i;
186 qemu_irq *i8259;
187 ISABus *isa_bus;
188 DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
189 DriveInfo *dinfo;
190 int be;
191
192 cpuclk = clock_new(OBJECT(machine), "cpu-refclk");
193 clock_set_hz(cpuclk, 200000000); /* 200 MHz */
194
195 /* init CPUs */
196 cpu = mips_cpu_create_with_clock(machine->cpu_type, cpuclk);
197 env = &cpu->env;
198
199 reset_info = g_malloc0(sizeof(ResetData));
200 reset_info->cpu = cpu;
201 reset_info->vector = env->active_tc.PC;
202 qemu_register_reset(main_cpu_reset, reset_info);
203
204 /* allocate RAM */
205 if (machine->ram_size > 256 * MiB) {
206 error_report("Too much memory for this machine: %" PRId64 "MB,"
207 " maximum 256MB", ram_size / MiB);
208 exit(1);
209 }
210 memory_region_add_subregion(address_space_mem, 0, machine->ram);
211
212 memory_region_init_io(iomem, NULL, &mips_qemu_ops,
213 NULL, "mips-qemu", 0x10000);
214
215 memory_region_add_subregion(address_space_mem, 0x1fbf0000, iomem);
216
217 /*
218 * Try to load a BIOS image. If this fails, we continue regardless,
219 * but initialize the hardware ourselves. When a kernel gets
220 * preloaded we also initialize the hardware, since the BIOS wasn't
221 * run.
222 */
223
224 if (bios_name == NULL) {
225 bios_name = BIOS_FILENAME;
226 }
227 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
228 if (filename) {
229 bios_size = get_image_size(filename);
230 } else {
231 bios_size = -1;
232 }
233 #ifdef TARGET_WORDS_BIGENDIAN
234 be = 1;
235 #else
236 be = 0;
237 #endif
238 dinfo = drive_get(IF_PFLASH, 0, 0);
239 if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
240 bios = g_new(MemoryRegion, 1);
241 memory_region_init_rom(bios, NULL, "mips_r4k.bios", BIOS_SIZE,
242 &error_fatal);
243 memory_region_add_subregion(get_system_memory(), 0x1fc00000, bios);
244
245 load_image_targphys(filename, 0x1fc00000, BIOS_SIZE);
246 } else if (dinfo != NULL) {
247 uint32_t mips_rom = 0x00400000;
248 if (!pflash_cfi01_register(0x1fc00000, "mips_r4k.bios", mips_rom,
249 blk_by_legacy_dinfo(dinfo),
250 sector_len, 4, 0, 0, 0, 0, be)) {
251 fprintf(stderr, "qemu: Error registering flash memory.\n");
252 }
253 } else if (!qtest_enabled()) {
254 /* not fatal */
255 warn_report("could not load MIPS bios '%s'", bios_name);
256 }
257 g_free(filename);
258
259 if (kernel_filename) {
260 loaderparams.ram_size = machine->ram_size;
261 loaderparams.kernel_filename = kernel_filename;
262 loaderparams.kernel_cmdline = kernel_cmdline;
263 loaderparams.initrd_filename = initrd_filename;
264 reset_info->vector = load_kernel();
265 }
266
267 /* Init CPU internal devices */
268 cpu_mips_irq_init_cpu(cpu);
269 cpu_mips_clock_init(cpu);
270
271 /* ISA bus: IO space at 0x14000000, mem space at 0x10000000 */
272 memory_region_init_alias(isa_io, NULL, "isa-io",
273 get_system_io(), 0, 0x00010000);
274 memory_region_init(isa_mem, NULL, "isa-mem", 0x01000000);
275 memory_region_add_subregion(get_system_memory(), 0x14000000, isa_io);
276 memory_region_add_subregion(get_system_memory(), 0x10000000, isa_mem);
277 isa_bus = isa_bus_new(NULL, isa_mem, get_system_io(), &error_abort);
278
279 /* The PIC is attached to the MIPS CPU INT0 pin */
280 i8259 = i8259_init(isa_bus, env->irq[2]);
281 isa_bus_irqs(isa_bus, i8259);
282
283 mc146818_rtc_init(isa_bus, 2000, NULL);
284
285 pit = i8254_pit_init(isa_bus, 0x40, 0, NULL);
286
287 serial_hds_isa_init(isa_bus, 0, MAX_ISA_SERIAL_PORTS);
288
289 isa_vga_init(isa_bus);
290
291 if (nd_table[0].used) {
292 isa_ne2000_init(isa_bus, 0x300, 9, &nd_table[0]);
293 }
294
295 ide_drive_get(hd, ARRAY_SIZE(hd));
296 for (i = 0; i < MAX_IDE_BUS; i++)
297 isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i], ide_irq[i],
298 hd[MAX_IDE_DEVS * i],
299 hd[MAX_IDE_DEVS * i + 1]);
300
301 isa_create_simple(isa_bus, TYPE_I8042);
302 }
303
304 static void mips_machine_init(MachineClass *mc)
305 {
306 mc->deprecation_reason = "use malta machine type instead";
307 mc->desc = "mips r4k platform";
308 mc->init = mips_r4k_init;
309 mc->block_default_type = IF_IDE;
310 #ifdef TARGET_MIPS64
311 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("R4000");
312 #else
313 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("24Kf");
314 #endif
315 mc->default_ram_id = "mips_r4k.ram";
316 }
317
318 DEFINE_MACHINE("mips", mips_machine_init)