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