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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 "sysemu/device_tree.h"
34#include "sysemu/sysemu.h"
35#include "hw/loader.h"
36#include "elf.h"
37#include "qemu/cutils.h"
38
39#include "boot.h"
40
41static struct
42{
43 void (*machine_cpu_reset)(MicroBlazeCPU *);
44 uint32_t bootstrap_pc;
45 uint32_t cmdline;
46 uint32_t initrd_start;
47 uint32_t initrd_end;
48 uint32_t fdt;
49} boot_info;
50
51static void main_cpu_reset(void *opaque)
52{
53 MicroBlazeCPU *cpu = opaque;
54 CPUState *cs = CPU(cpu);
55 CPUMBState *env = &cpu->env;
56
57 cpu_reset(cs);
58 env->regs[5] = boot_info.cmdline;
59 env->regs[6] = boot_info.initrd_start;
60 env->regs[7] = boot_info.fdt;
61 cpu_set_pc(cs, boot_info.bootstrap_pc);
62 if (boot_info.machine_cpu_reset) {
63 boot_info.machine_cpu_reset(cpu);
64 }
65}
66
67static int microblaze_load_dtb(hwaddr addr,
68 uint32_t ramsize,
69 uint32_t initrd_start,
70 uint32_t initrd_end,
71 const char *kernel_cmdline,
72 const char *dtb_filename,
73 void *fdt,
74 int fdt_size)
75{
76 int r;
77
78 if (!fdt) {
79
80 if (dtb_filename) {
81 fdt = load_device_tree(dtb_filename, &fdt_size);
82 }
83 if (!fdt) {
84 return 0;
85 }
86 }
87
88 if (kernel_cmdline) {
89 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
90 kernel_cmdline);
91 if (r < 0) {
92 fprintf(stderr, "couldn't set /chosen/bootargs\n");
93 }
94 }
95
96 if (initrd_start) {
97 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
98 initrd_start);
99
100 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
101 initrd_end);
102 }
103
104 cpu_physical_memory_write(addr, fdt, fdt_size);
105 return fdt_size;
106}
107
108static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
109{
110 return addr - 0x30000000LL;
111}
112
113void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
114 uint32_t ramsize,
115 const char *initrd_filename,
116 const char *dtb_filename,
117 void (*machine_cpu_reset)(MicroBlazeCPU *),
118 void *fdt, int fdt_size)
119{
120 QemuOpts *machine_opts;
121 const char *kernel_filename;
122 const char *kernel_cmdline;
123 const char *dtb_arg;
124 char *filename = NULL;
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 g_free(filename);
222}
223