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31#include "qemu/osdep.h"
32#include "qemu-common.h"
33#include "cpu.h"
34#include "qemu/option.h"
35#include "qemu/config-file.h"
36#include "qemu/error-report.h"
37#include "qemu-common.h"
38#include "sysemu/device_tree.h"
39#include "sysemu/sysemu.h"
40#include "hw/loader.h"
41#include "elf.h"
42#include "qemu/cutils.h"
43
44#include "boot.h"
45
46#define NIOS2_MAGIC 0x534f494e
47
48static struct nios2_boot_info {
49 void (*machine_cpu_reset)(Nios2CPU *);
50 uint32_t bootstrap_pc;
51 uint32_t cmdline;
52 uint32_t initrd_start;
53 uint32_t initrd_end;
54 uint32_t fdt;
55} boot_info;
56
57static void main_cpu_reset(void *opaque)
58{
59 Nios2CPU *cpu = opaque;
60 CPUState *cs = CPU(cpu);
61 CPUNios2State *env = &cpu->env;
62
63 cpu_reset(CPU(cpu));
64
65 env->regs[R_ARG0] = NIOS2_MAGIC;
66 env->regs[R_ARG1] = boot_info.initrd_start;
67 env->regs[R_ARG2] = boot_info.fdt;
68 env->regs[R_ARG3] = boot_info.cmdline;
69
70 cpu_set_pc(cs, boot_info.bootstrap_pc);
71 if (boot_info.machine_cpu_reset) {
72 boot_info.machine_cpu_reset(cpu);
73 }
74}
75
76static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
77{
78 return addr - 0xc0000000LL;
79}
80
81static int nios2_load_dtb(struct nios2_boot_info bi, const uint32_t ramsize,
82 const char *kernel_cmdline, const char *dtb_filename)
83{
84 int fdt_size;
85 void *fdt = NULL;
86 int r;
87
88 if (dtb_filename) {
89 fdt = load_device_tree(dtb_filename, &fdt_size);
90 }
91 if (!fdt) {
92 return 0;
93 }
94
95 if (kernel_cmdline) {
96 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
97 kernel_cmdline);
98 if (r < 0) {
99 fprintf(stderr, "couldn't set /chosen/bootargs\n");
100 }
101 }
102
103 if (bi.initrd_start) {
104 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
105 translate_kernel_address(NULL, bi.initrd_start));
106
107 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
108 translate_kernel_address(NULL, bi.initrd_end));
109 }
110
111 cpu_physical_memory_write(bi.fdt, fdt, fdt_size);
112 return fdt_size;
113}
114
115void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
116 uint32_t ramsize,
117 const char *initrd_filename,
118 const char *dtb_filename,
119 void (*machine_cpu_reset)(Nios2CPU *))
120{
121 QemuOpts *machine_opts;
122 const char *kernel_filename;
123 const char *kernel_cmdline;
124 const char *dtb_arg;
125 char *filename = NULL;
126
127 machine_opts = qemu_get_machine_opts();
128 kernel_filename = qemu_opt_get(machine_opts, "kernel");
129 kernel_cmdline = qemu_opt_get(machine_opts, "append");
130 dtb_arg = qemu_opt_get(machine_opts, "dtb");
131
132 if (!dtb_arg) {
133 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
134 }
135
136 boot_info.machine_cpu_reset = machine_cpu_reset;
137 qemu_register_reset(main_cpu_reset, cpu);
138
139 if (kernel_filename) {
140 int kernel_size, fdt_size;
141 uint64_t entry, low, high;
142 uint32_t base32;
143 int big_endian = 0;
144
145#ifdef TARGET_WORDS_BIGENDIAN
146 big_endian = 1;
147#endif
148
149
150 kernel_size = load_elf(kernel_filename, NULL, NULL,
151 &entry, &low, &high,
152 big_endian, EM_ALTERA_NIOS2, 0, 0);
153 base32 = entry;
154 if (base32 == 0xc0000000) {
155 kernel_size = load_elf(kernel_filename, translate_kernel_address,
156 NULL, &entry, NULL, NULL,
157 big_endian, EM_ALTERA_NIOS2, 0, 0);
158 }
159
160
161 boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry & 0x07ffffff);
162
163
164 if (kernel_size < 0) {
165 hwaddr uentry, loadaddr;
166
167 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
168 NULL, NULL);
169 boot_info.bootstrap_pc = uentry;
170 high = loadaddr + kernel_size;
171 }
172
173
174 if (kernel_size < 0) {
175 kernel_size = load_image_targphys(kernel_filename, ddr_base,
176 ram_size);
177 boot_info.bootstrap_pc = ddr_base;
178 high = ddr_base + kernel_size;
179 }
180
181 high = ROUND_UP(high, 1024 * 1024);
182
183
184 if (initrd_filename) {
185 int initrd_size;
186 uint32_t initrd_offset;
187
188 boot_info.initrd_start = high;
189 initrd_offset = boot_info.initrd_start - ddr_base;
190
191 initrd_size = load_ramdisk(initrd_filename,
192 boot_info.initrd_start,
193 ram_size - initrd_offset);
194 if (initrd_size < 0) {
195 initrd_size = load_image_targphys(initrd_filename,
196 boot_info.initrd_start,
197 ram_size - initrd_offset);
198 }
199 if (initrd_size < 0) {
200 error_report("could not load initrd '%s'",
201 initrd_filename);
202 exit(EXIT_FAILURE);
203 }
204 high += initrd_size;
205 }
206 high = ROUND_UP(high, 4);
207 boot_info.initrd_end = high;
208
209
210 boot_info.fdt = high;
211 fdt_size = nios2_load_dtb(boot_info, ram_size, kernel_cmdline,
212
213 dtb_arg ? dtb_arg : filename);
214 high += fdt_size;
215
216
217 boot_info.cmdline = ROUND_UP(high, 4096);
218 if (kernel_cmdline && strlen(kernel_cmdline)) {
219 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
220 }
221 }
222 g_free(filename);
223}
224