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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{
74 int fdt_size;
75 void *fdt = NULL;
76 int r;
77
78 if (dtb_filename) {
79 fdt = load_device_tree(dtb_filename, &fdt_size);
80 }
81 if (!fdt) {
82 return 0;
83 }
84
85 if (kernel_cmdline) {
86 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
87 kernel_cmdline);
88 if (r < 0) {
89 fprintf(stderr, "couldn't set /chosen/bootargs\n");
90 }
91 }
92
93 if (initrd_start) {
94 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
95 initrd_start);
96
97 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
98 initrd_end);
99 }
100
101 cpu_physical_memory_write(addr, fdt, fdt_size);
102 return fdt_size;
103}
104
105static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
106{
107 return addr - 0x30000000LL;
108}
109
110void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
111 uint32_t ramsize,
112 const char *initrd_filename,
113 const char *dtb_filename,
114 void (*machine_cpu_reset)(MicroBlazeCPU *))
115{
116 QemuOpts *machine_opts;
117 const char *kernel_filename;
118 const char *kernel_cmdline;
119 const char *dtb_arg;
120 char *filename = NULL;
121
122 machine_opts = qemu_get_machine_opts();
123 kernel_filename = qemu_opt_get(machine_opts, "kernel");
124 kernel_cmdline = qemu_opt_get(machine_opts, "append");
125 dtb_arg = qemu_opt_get(machine_opts, "dtb");
126
127 if (!dtb_arg && dtb_filename) {
128 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
129 }
130
131 boot_info.machine_cpu_reset = machine_cpu_reset;
132 qemu_register_reset(main_cpu_reset, cpu);
133
134 if (kernel_filename) {
135 int kernel_size;
136 uint64_t entry, low, high;
137 uint32_t base32;
138 int big_endian = 0;
139
140#ifdef TARGET_WORDS_BIGENDIAN
141 big_endian = 1;
142#endif
143
144
145 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
146 &entry, &low, &high,
147 big_endian, EM_MICROBLAZE, 0, 0);
148 base32 = entry;
149 if (base32 == 0xc0000000) {
150 kernel_size = load_elf(kernel_filename, NULL,
151 translate_kernel_address, NULL,
152 &entry, NULL, NULL,
153 big_endian, EM_MICROBLAZE, 0, 0);
154 }
155
156 boot_info.bootstrap_pc = (uint32_t)entry;
157
158
159 if (kernel_size < 0) {
160 hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
161
162 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
163 NULL, NULL);
164 boot_info.bootstrap_pc = uentry;
165 high = (loadaddr + kernel_size + 3) & ~3;
166 }
167
168
169 if (kernel_size < 0) {
170 kernel_size = load_image_targphys(kernel_filename, ddr_base,
171 ram_size);
172 boot_info.bootstrap_pc = ddr_base;
173 high = (ddr_base + kernel_size + 3) & ~3;
174 }
175
176 if (initrd_filename) {
177 int initrd_size;
178 uint32_t initrd_offset;
179
180 high = ROUND_UP(high + kernel_size, 4);
181 boot_info.initrd_start = high;
182 initrd_offset = boot_info.initrd_start - ddr_base;
183
184 initrd_size = load_ramdisk(initrd_filename,
185 boot_info.initrd_start,
186 ram_size - initrd_offset);
187 if (initrd_size < 0) {
188 initrd_size = load_image_targphys(initrd_filename,
189 boot_info.initrd_start,
190 ram_size - initrd_offset);
191 }
192 if (initrd_size < 0) {
193 error_report("could not load initrd '%s'",
194 initrd_filename);
195 exit(EXIT_FAILURE);
196 }
197 boot_info.initrd_end = boot_info.initrd_start + initrd_size;
198 high = ROUND_UP(high + initrd_size, 4);
199 }
200
201 boot_info.cmdline = high + 4096;
202 if (kernel_cmdline && strlen(kernel_cmdline)) {
203 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
204 }
205
206 boot_info.fdt = boot_info.cmdline + 4096;
207 microblaze_load_dtb(boot_info.fdt, ram_size,
208 boot_info.initrd_start,
209 boot_info.initrd_end,
210 kernel_cmdline,
211
212 dtb_arg ? dtb_arg : filename);
213 }
214 g_free(filename);
215}
216