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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, initrd_size;
62 long kernel_size;
63 ram_addr_t initrd_offset;
64 int big_endian;
65
66#ifdef TARGET_WORDS_BIGENDIAN
67 big_endian = 1;
68#else
69 big_endian = 0;
70#endif
71
72 kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys,
73 NULL, (uint64_t *)&entry, NULL,
74 (uint64_t *)&kernel_high, big_endian,
75 EM_MIPS, 1, 0);
76 if (kernel_size >= 0) {
77 if ((entry & ~0x7fffffffULL) == 0x80000000)
78 entry = (int32_t)entry;
79 } else {
80 error_report("could not load kernel '%s': %s",
81 loaderparams.kernel_filename,
82 load_elf_strerror(kernel_size));
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 error_report("memory too small for initial ram disk '%s'",
95 loaderparams.initrd_filename);
96 exit(1);
97 }
98 initrd_size = load_image_targphys(loaderparams.initrd_filename,
99 initrd_offset, loaderparams.ram_size - initrd_offset);
100 }
101 if (initrd_size == (target_ulong) -1) {
102 error_report("could not load initial ram disk '%s'",
103 loaderparams.initrd_filename);
104 exit(1);
105 }
106 }
107 return entry;
108}
109
110static void main_cpu_reset(void *opaque)
111{
112 ResetData *s = (ResetData *)opaque;
113 CPUMIPSState *env = &s->cpu->env;
114
115 cpu_reset(CPU(s->cpu));
116 env->active_tc.PC = s->vector & ~(target_ulong)1;
117 if (s->vector & 1) {
118 env->hflags |= MIPS_HFLAG_M16;
119 }
120}
121
122static void mipsnet_init(int base, qemu_irq irq, NICInfo *nd)
123{
124 DeviceState *dev;
125 SysBusDevice *s;
126
127 dev = qdev_create(NULL, "mipsnet");
128 qdev_set_nic_properties(dev, nd);
129 qdev_init_nofail(dev);
130
131 s = SYS_BUS_DEVICE(dev);
132 sysbus_connect_irq(s, 0, irq);
133 memory_region_add_subregion(get_system_io(),
134 base,
135 sysbus_mmio_get_region(s, 0));
136}
137
138static void
139mips_mipssim_init(MachineState *machine)
140{
141 ram_addr_t ram_size = machine->ram_size;
142 const char *kernel_filename = machine->kernel_filename;
143 const char *kernel_cmdline = machine->kernel_cmdline;
144 const char *initrd_filename = machine->initrd_filename;
145 char *filename;
146 MemoryRegion *address_space_mem = get_system_memory();
147 MemoryRegion *isa = g_new(MemoryRegion, 1);
148 MemoryRegion *ram = g_new(MemoryRegion, 1);
149 MemoryRegion *bios = g_new(MemoryRegion, 1);
150 MIPSCPU *cpu;
151 CPUMIPSState *env;
152 ResetData *reset_info;
153 int bios_size;
154
155
156 cpu = MIPS_CPU(cpu_create(machine->cpu_type));
157 env = &cpu->env;
158
159 reset_info = g_malloc0(sizeof(ResetData));
160 reset_info->cpu = cpu;
161 reset_info->vector = env->active_tc.PC;
162 qemu_register_reset(main_cpu_reset, reset_info);
163
164
165 memory_region_allocate_system_memory(ram, NULL, "mips_mipssim.ram",
166 ram_size);
167 memory_region_init_ram(bios, NULL, "mips_mipssim.bios", BIOS_SIZE,
168 &error_fatal);
169 memory_region_set_readonly(bios, true);
170
171 memory_region_add_subregion(address_space_mem, 0, ram);
172
173
174 memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);
175
176 if (bios_name == NULL)
177 bios_name = BIOS_FILENAME;
178 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
179 if (filename) {
180 bios_size = load_image_targphys(filename, 0x1fc00000LL, BIOS_SIZE);
181 g_free(filename);
182 } else {
183 bios_size = -1;
184 }
185 if ((bios_size < 0 || bios_size > BIOS_SIZE) &&
186 !kernel_filename && !qtest_enabled()) {
187
188 error_report("Could not load MIPS bios '%s', and no "
189 "-kernel argument was specified", bios_name);
190 exit(1);
191 } else {
192
193 env->active_tc.PC = (target_long)(int32_t)0xbfc00000;
194 }
195
196 if (kernel_filename) {
197 loaderparams.ram_size = ram_size;
198 loaderparams.kernel_filename = kernel_filename;
199 loaderparams.kernel_cmdline = kernel_cmdline;
200 loaderparams.initrd_filename = initrd_filename;
201 reset_info->vector = load_kernel();
202 }
203
204
205 cpu_mips_irq_init_cpu(cpu);
206 cpu_mips_clock_init(cpu);
207
208
209 memory_region_init_alias(isa, NULL, "isa_mmio",
210 get_system_io(), 0, 0x00010000);
211 memory_region_add_subregion(get_system_memory(), 0x1fd00000, isa);
212
213
214
215 if (serial_hd(0))
216 serial_init(0x3f8, env->irq[4], 115200, serial_hd(0),
217 get_system_io());
218
219 if (nd_table[0].used)
220
221 mipsnet_init(0x4200, env->irq[2], &nd_table[0]);
222}
223
224static void mips_mipssim_machine_init(MachineClass *mc)
225{
226 mc->desc = "MIPS MIPSsim platform";
227 mc->init = mips_mipssim_init;
228#ifdef TARGET_MIPS64
229 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("5Kf");
230#else
231 mc->default_cpu_type = MIPS_CPU_TYPE_NAME("24Kf");
232#endif
233}
234
235DEFINE_MACHINE("mipssim", mips_mipssim_machine_init)
236