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27#include "qemu/osdep.h"
28#include "qemu-common.h"
29#include "cpu.h"
30#include "qemu/option.h"
31#include "qemu/config-file.h"
32#include "qemu/error-report.h"
33#include "qemu-common.h"
34#include "sysemu/device_tree.h"
35#include "sysemu/sysemu.h"
36#include "hw/loader.h"
37#include "elf.h"
38#include "qemu/cutils.h"
39
40#include "boot.h"
41
42static struct
43{
44 void (*machine_cpu_reset)(MicroBlazeCPU *);
45 uint32_t bootstrap_pc;
46 uint32_t cmdline;
47 uint32_t initrd_start;
48 uint32_t initrd_end;
49 uint32_t fdt;
50} boot_info;
51
52static void main_cpu_reset(void *opaque)
53{
54 MicroBlazeCPU *cpu = opaque;
55 CPUState *cs = CPU(cpu);
56 CPUMBState *env = &cpu->env;
57
58 cpu_reset(cs);
59 env->regs[5] = boot_info.cmdline;
60 env->regs[6] = boot_info.initrd_start;
61 env->regs[7] = boot_info.fdt;
62 cpu_set_pc(cs, boot_info.bootstrap_pc);
63 if (boot_info.machine_cpu_reset) {
64 boot_info.machine_cpu_reset(cpu);
65 }
66}
67
68static int microblaze_load_dtb(hwaddr addr,
69 uint32_t ramsize,
70 uint32_t initrd_start,
71 uint32_t initrd_end,
72 const char *kernel_cmdline,
73 const char *dtb_filename,
74 void *fdt,
75 int fdt_size)
76{
77 int r;
78
79 if (!fdt) {
80
81 if (dtb_filename) {
82 fdt = load_device_tree(dtb_filename, &fdt_size);
83 }
84 if (!fdt) {
85 return 0;
86 }
87 }
88
89 if (kernel_cmdline) {
90 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
91 kernel_cmdline);
92 if (r < 0) {
93 fprintf(stderr, "couldn't set /chosen/bootargs\n");
94 }
95 }
96
97 if (initrd_start) {
98 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
99 initrd_start);
100
101 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
102 initrd_end);
103 }
104
105 cpu_physical_memory_write(addr, fdt, fdt_size);
106 return fdt_size;
107}
108
109static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
110{
111 return addr - 0x30000000LL;
112}
113
114void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
115 uint32_t ramsize,
116 const char *initrd_filename,
117 const char *dtb_filename,
118 void (*machine_cpu_reset)(MicroBlazeCPU *),
119 void *fdt, int fdt_size)
120{
121 QemuOpts *machine_opts;
122 const char *kernel_filename;
123 const char *kernel_cmdline;
124 const char *dtb_arg;
125
126 machine_opts = qemu_get_machine_opts();
127 kernel_filename = qemu_opt_get(machine_opts, "kernel");
128 kernel_cmdline = qemu_opt_get(machine_opts, "append");
129 dtb_arg = qemu_opt_get(machine_opts, "dtb");
130 if (!fdt) {
131 if (dtb_arg) {
132 dtb_filename = dtb_arg;
133 } else {
134 dtb_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
135 }
136 }
137
138 boot_info.machine_cpu_reset = machine_cpu_reset;
139 qemu_register_reset(main_cpu_reset, cpu);
140
141 if (kernel_filename) {
142 int kernel_size;
143 uint64_t entry, low, high;
144 uint32_t base32;
145 int big_endian = 0;
146
147#ifdef TARGET_WORDS_BIGENDIAN
148 big_endian = 1;
149#endif
150
151
152 kernel_size = load_elf(kernel_filename, NULL, NULL,
153 &entry, &low, &high,
154 big_endian, EM_MICROBLAZE, 0, 0);
155 base32 = entry;
156 if (base32 == 0xc0000000) {
157 kernel_size = load_elf(kernel_filename, translate_kernel_address,
158 NULL, &entry, NULL, NULL,
159 big_endian, EM_MICROBLAZE, 0, 0);
160 }
161
162 boot_info.bootstrap_pc = (uint32_t)entry;
163
164
165 if (kernel_size < 0) {
166 hwaddr uentry, loadaddr;
167
168 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
169 NULL, NULL);
170 boot_info.bootstrap_pc = uentry;
171 high = (loadaddr + kernel_size + 3) & ~3;
172 }
173
174
175 if (kernel_size < 0) {
176 kernel_size = load_image_targphys(kernel_filename, ddr_base,
177 ram_size);
178 boot_info.bootstrap_pc = ddr_base;
179 high = (ddr_base + kernel_size + 3) & ~3;
180 }
181
182 if (initrd_filename) {
183 int initrd_size;
184 uint32_t initrd_offset;
185
186 high = ROUND_UP(high + kernel_size, 4);
187 boot_info.initrd_start = high;
188 initrd_offset = boot_info.initrd_start - ddr_base;
189
190 initrd_size = load_ramdisk(initrd_filename,
191 boot_info.initrd_start,
192 ram_size - initrd_offset);
193 if (initrd_size < 0) {
194 initrd_size = load_image_targphys(initrd_filename,
195 boot_info.initrd_start,
196 ram_size - initrd_offset);
197 }
198 if (initrd_size < 0) {
199 error_report("qemu: could not load initrd '%s'",
200 initrd_filename);
201 exit(EXIT_FAILURE);
202 }
203 boot_info.initrd_end = boot_info.initrd_start + initrd_size;
204 high = ROUND_UP(high + initrd_size, 4);
205 }
206
207 boot_info.cmdline = high + 4096;
208 if (kernel_cmdline && strlen(kernel_cmdline)) {
209 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
210 }
211
212 boot_info.fdt = boot_info.cmdline + 4096;
213 microblaze_load_dtb(boot_info.fdt, ram_size,
214 boot_info.initrd_start,
215 boot_info.initrd_end,
216 kernel_cmdline,
217 dtb_filename,
218 fdt,
219 fdt_size);
220 }
221
222}
223