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31#include "qemu/osdep.h"
32#include "qemu/units.h"
33#include "qemu-common.h"
34#include "cpu.h"
35#include "qemu/option.h"
36#include "qemu/config-file.h"
37#include "qemu/error-report.h"
38#include "sysemu/device_tree.h"
39#include "sysemu/sysemu.h"
40#include "hw/loader.h"
41#include "elf.h"
42
43#include "boot.h"
44
45#define NIOS2_MAGIC 0x534f494e
46
47static struct nios2_boot_info {
48 void (*machine_cpu_reset)(Nios2CPU *);
49 uint32_t bootstrap_pc;
50 uint32_t cmdline;
51 uint32_t initrd_start;
52 uint32_t initrd_end;
53 uint32_t fdt;
54} boot_info;
55
56static void main_cpu_reset(void *opaque)
57{
58 Nios2CPU *cpu = opaque;
59 CPUState *cs = CPU(cpu);
60 CPUNios2State *env = &cpu->env;
61
62 cpu_reset(CPU(cpu));
63
64 env->regs[R_ARG0] = NIOS2_MAGIC;
65 env->regs[R_ARG1] = boot_info.initrd_start;
66 env->regs[R_ARG2] = boot_info.fdt;
67 env->regs[R_ARG3] = boot_info.cmdline;
68
69 cpu_set_pc(cs, boot_info.bootstrap_pc);
70 if (boot_info.machine_cpu_reset) {
71 boot_info.machine_cpu_reset(cpu);
72 }
73}
74
75static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
76{
77 return addr - 0xc0000000LL;
78}
79
80static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
81 const char *kernel_cmdline, const char *dtb_filename)
82{
83 int fdt_size;
84 void *fdt = NULL;
85 int r;
86
87 if (dtb_filename) {
88 fdt = load_device_tree(dtb_filename, &fdt_size);
89 }
90 if (!fdt) {
91 return 0;
92 }
93
94 if (kernel_cmdline) {
95 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
96 kernel_cmdline);
97 if (r < 0) {
98 fprintf(stderr, "couldn't set /chosen/bootargs\n");
99 }
100 }
101
102 if (bi.initrd_start) {
103 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
104 translate_kernel_address(NULL, bi.initrd_start));
105
106 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
107 translate_kernel_address(NULL, bi.initrd_end));
108 }
109
110 cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
111 return fdt_size;
112}
113
114void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
115 uint32_t ramsize,
116 const char *initrd_filename,
117 const char *dtb_filename,
118 void (*machine_cpu_reset)(Nios2CPU *))
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
131 if (!dtb_arg) {
132 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
133 }
134
135 boot_info.machine_cpu_reset = machine_cpu_reset;
136 qemu_register_reset(main_cpu_reset, cpu);
137
138 if (kernel_filename) {
139 int kernel_size, fdt_size;
140 uint64_t entry, low, high;
141 uint32_t base32;
142 int big_endian = 0;
143
144#ifdef TARGET_WORDS_BIGENDIAN
145 big_endian = 1;
146#endif
147
148
149 kernel_size = load_elf(kernel_filename, NULL, NULL,
150 &entry, &low, &high,
151 big_endian, EM_ALTERA_NIOS2, 0, 0);
152 base32 = entry;
153 if (base32 == 0xc0000000) {
154 kernel_size = load_elf(kernel_filename, translate_kernel_address,
155 NULL, &entry, NULL, NULL,
156 big_endian, EM_ALTERA_NIOS2, 0, 0);
157 }
158
159
160 boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff);
161
162
163 if (kernel_size < 0) {
164 hwaddr uentry, loadaddr;
165
166 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
167 NULL, NULL);
168 boot_info.bootstrap_pc = uentry;
169 high = loadaddr + kernel_size;
170 }
171
172
173 if (kernel_size < 0) {
174 kernel_size = load_image_targphys(kernel_filename, ddr_base,
175 ram_size);
176 boot_info.bootstrap_pc = ddr_base;
177 high = ddr_base + kernel_size;
178 }
179
180 high = ROUND_UP(high, 1 * MiB);
181
182
183 if (initrd_filename) {
184 int initrd_size;
185 uint32_t initrd_offset;
186
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("could not load initrd '%s'",
200 initrd_filename);
201 exit(EXIT_FAILURE);
202 }
203 high += initrd_size;
204 }
205 high = ROUND_UP(high, 4);
206 boot_info.initrd_end = high;
207
208
209 boot_info.fdt = high;
210 fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline,
211
212 dtb_arg ? dtb_arg : filename);
213 high += fdt_size;
214
215
216 boot_info.cmdline = ROUND_UP(high, 4 * KiB);
217 if (kernel_cmdline && strlen(kernel_cmdline)) {
218 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
219 }
220 }
221 g_free(filename);
222}
223