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27#include "qemu/osdep.h"
28#include "qapi/error.h"
29#include "qemu-common.h"
30#include "cpu.h"
31#include "hw/hw.h"
32#include "hw/mips/mips.h"
33#include "hw/mips/cpudevs.h"
34#include "hw/char/serial.h"
35#include "hw/isa/isa.h"
36#include "net/net.h"
37#include "sysemu/sysemu.h"
38#include "hw/boards.h"
39#include "hw/mips/bios.h"
40#include "hw/loader.h"
41#include "elf.h"
42#include "hw/sysbus.h"
43#include "exec/address-spaces.h"
44#include "qemu/error-report.h"
45#include "sysemu/qtest.h"
46
47static struct _loaderparams {
48 int ram_size;
49 const char *kernel_filename;
50 const char *kernel_cmdline;
51 const char *initrd_filename;
52} loaderparams;
53
54typedef struct ResetData {
55 MIPSCPU *cpu;
56 uint64_t vector;
57} ResetData;
58
59static int64_t load_kernel(void)
60{
61 int64_t entry, kernel_high;
62 long kernel_size;
63 long initrd_size;
64 ram_addr_t initrd_offset;
65 int big_endian;
66
67#ifdef TARGET_WORDS_BIGENDIAN
68 big_endian = 1;
69#else
70 big_endian = 0;
71#endif
72
73 kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
74 NULL, (uint64_t *)&entry, NULL,
75 (uint64_t *)&kernel_high, big_endian,
76 EM_MIPS, 1, 0);
77 if (kernel_size >= 0) {
78 if ((entry & ~0x7fffffffULL) == 0x80000000)
79 entry = (int32_t)entry;
80 } else {
81 fprintf(stderr, "qemu: could not load kernel '%s'\n",
82 loaderparams.kernel_filename);
83 exit(1);
84 }
85
86
87 initrd_size = 0;
88 initrd_offset = 0;
89 if (loaderparams.initrd_filename) {
90 initrd_size = get_image_size (loaderparams.initrd_filename);
91 if (initrd_size > 0) {
92 initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK;
93 if (initrd_offset + initrd_size > loaderparams.ram_size) {
94 fprintf(stderr,
95 "qemu: memory too small for initial ram disk '%s'\n",
96 loaderparams.initrd_filename);
97 exit(1);
98 }
99 initrd_size = load_image_targphys(loaderparams.initrd_filename,
100 initrd_offset, loaderparams.ram_size - initrd_offset);
101 }
102 if (initrd_size == (target_ulong) -1) {
103 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
104 loaderparams.initrd_filename);
105 exit(1);
106 }
107 }
108 return entry;
109}
110
111static void main_cpu_reset(void *opaque)
112{
113 ResetData *s = (ResetData *)opaque;
114 CPUMIPSState *env = &s->cpu->env;
115
116 cpu_reset(CPU(s->cpu));
117 env->active_tc.PC = s->vector & ~(target_ulong)1;
118 if (s->vector & 1) {
119 env->hflags |= MIPS_HFLAG_M16;
120 }
121}
122
123static void mipsnet_init(int base, qemu_irq irq, NICInfo *nd)
124{
125 DeviceState *dev;
126 SysBusDevice *s;
127
128 dev = qdev_create(NULL, "mipsnet");
129 qdev_set_nic_properties(dev, nd);
130 qdev_init_nofail(dev);
131
132 s = SYS_BUS_DEVICE(dev);
133 sysbus_connect_irq(s, 0, irq);
134 memory_region_add_subregion(get_system_io(),
135 base,
136 sysbus_mmio_get_region(s, 0));
137}
138
139static void
140mips_mipssim_init(MachineState *machine)
141{
142 ram_addr_t ram_size = machine->ram_size;
143 const char *cpu_model = machine->cpu_model;
144 const char *kernel_filename = machine->kernel_filename;
145 const char *kernel_cmdline = machine->kernel_cmdline;
146 const char *initrd_filename = machine->initrd_filename;
147 char *filename;
148 MemoryRegion *address_space_mem = get_system_memory();
149 MemoryRegion *isa = g_new(MemoryRegion, 1);
150 MemoryRegion *ram = g_new(MemoryRegion, 1);
151 MemoryRegion *bios = g_new(MemoryRegion, 1);
152 MIPSCPU *cpu;
153 CPUMIPSState *env;
154 ResetData *reset_info;
155 int bios_size;
156
157
158 if (cpu_model == NULL) {
159#ifdef TARGET_MIPS64
160 cpu_model = "5Kf";
161#else
162 cpu_model = "24Kf";
163#endif
164 }
165 cpu = cpu_mips_init(cpu_model);
166 if (cpu == NULL) {
167 fprintf(stderr, "Unable to find CPU definition\n");
168 exit(1);
169 }
170 env = &cpu->env;
171
172 reset_info = g_malloc0(sizeof(ResetData));
173 reset_info->cpu = cpu;
174 reset_info->vector = env->active_tc.PC;
175 qemu_register_reset(main_cpu_reset, reset_info);
176
177
178 memory_region_allocate_system_memory(ram, NULL, "mips_mipssim.ram",
179 ram_size);
180 memory_region_init_ram(bios, NULL, "mips_mipssim.bios", BIOS_SIZE,
181 &error_fatal);
182 vmstate_register_ram_global(bios);
183 memory_region_set_readonly(bios, true);
184
185 memory_region_add_subregion(address_space_mem, 0, ram);
186
187
188 memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
189
190 if (bios_name == NULL)
191 bios_name = BIOS_FILENAME;
192 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
193 if (filename) {
194 bios_size = load_image_targphys(filename, 0x1fc00000LL, BIOS_SIZE);
195 g_free(filename);
196 } else {
197 bios_size = -1;
198 }
199 if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
200 !kernel_filename && !qtest_enabled()) {
201
202 error_report("Could not load MIPS bios '%s', and no "
203 "-kernel argument was specified", bios_name);
204 exit(1);
205 } else {
206
207 env->active_tc.PC = (target_long)(int32_t)0xbfc00000;
208 }
209
210 if (kernel_filename) {
211 loaderparams.ram_size = ram_size;
212 loaderparams.kernel_filename = kernel_filename;
213 loaderparams.kernel_cmdline = kernel_cmdline;
214 loaderparams.initrd_filename = initrd_filename;
215 reset_info->vector = load_kernel();
216 }
217
218
219 cpu_mips_irq_init_cpu(env);
220 cpu_mips_clock_init(env);
221
222
223 memory_region_init_alias(isa, NULL, "isa_mmio",
224 get_system_io(), 0, 0x00010000);
225 memory_region_add_subregion(get_system_memory(), 0x1fd00000, isa);
226
227
228
229 if (serial_hds[0])
230 serial_init(0x3f8, env->irq[4], 115200, serial_hds[0],
231 get_system_io());
232
233 if (nd_table[0].used)
234
235 mipsnet_init(0x4200, env->irq[2], &nd_table[0]);
236}
237
238static void mips_mipssim_machine_init(MachineClass *mc)
239{
240 mc->desc = "MIPS MIPSsim platform";
241 mc->init = mips_mipssim_init;
242}
243
244DEFINE_MACHINE("mipssim", mips_mipssim_machine_init)
245