configure: fix --meson=/path/to/meson
[qemu.git] / hw / microblaze / boot.c
1 /*
2 * Microblaze kernel loader
3 *
4 * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
5 * Copyright (c) 2012 PetaLogix
6 * Copyright (c) 2009 Edgar E. Iglesias.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
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/reset.h"
35 #include "sysemu/sysemu.h"
36 #include "hw/loader.h"
37 #include "elf.h"
38 #include "qemu/cutils.h"
39
40 #include "boot.h"
41
42 static struct
43 {
44 void (*machine_cpu_reset)(MicroBlazeCPU *);
45 uint32_t bootstrap_pc;
46 uint32_t cmdline;
47 uint32_t initrd_start;
48 uint32_t initrd_end;
49 uint32_t fdt;
50 } boot_info;
51
52 static void main_cpu_reset(void *opaque)
53 {
54 MicroBlazeCPU *cpu = opaque;
55 CPUState *cs = CPU(cpu);
56 CPUMBState *env = &cpu->env;
57
58 cpu_reset(cs);
59 env->regs[5] = boot_info.cmdline;
60 env->regs[6] = boot_info.initrd_start;
61 env->regs[7] = boot_info.fdt;
62 cpu_set_pc(cs, boot_info.bootstrap_pc);
63 if (boot_info.machine_cpu_reset) {
64 boot_info.machine_cpu_reset(cpu);
65 }
66 }
67
68 static int microblaze_load_dtb(hwaddr addr,
69 uint32_t ramsize,
70 uint32_t initrd_start,
71 uint32_t initrd_end,
72 const char *kernel_cmdline,
73 const char *dtb_filename)
74 {
75 int fdt_size;
76 void *fdt = NULL;
77 int r;
78
79 if (dtb_filename) {
80 fdt = load_device_tree(dtb_filename, &fdt_size);
81 }
82 if (!fdt) {
83 return 0;
84 }
85
86 if (kernel_cmdline) {
87 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
88 kernel_cmdline);
89 if (r < 0) {
90 fprintf(stderr, "couldn't set /chosen/bootargs\n");
91 }
92 }
93
94 if (initrd_start) {
95 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
96 initrd_start);
97
98 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
99 initrd_end);
100 }
101
102 cpu_physical_memory_write(addr, fdt, fdt_size);
103 g_free(fdt);
104 return fdt_size;
105 }
106
107 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
108 {
109 return addr - 0x30000000LL;
110 }
111
112 void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
113 uint32_t ramsize,
114 const char *initrd_filename,
115 const char *dtb_filename,
116 void (*machine_cpu_reset)(MicroBlazeCPU *))
117 {
118 QemuOpts *machine_opts;
119 const char *kernel_filename;
120 const char *kernel_cmdline;
121 const char *dtb_arg;
122 char *filename = NULL;
123
124 machine_opts = qemu_get_machine_opts();
125 kernel_filename = qemu_opt_get(machine_opts, "kernel");
126 kernel_cmdline = qemu_opt_get(machine_opts, "append");
127 dtb_arg = qemu_opt_get(machine_opts, "dtb");
128 /* default to pcbios dtb as passed by machine_init */
129 if (!dtb_arg && dtb_filename) {
130 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
131 }
132
133 boot_info.machine_cpu_reset = machine_cpu_reset;
134 qemu_register_reset(main_cpu_reset, cpu);
135
136 if (kernel_filename) {
137 int kernel_size;
138 uint64_t entry, high;
139 uint32_t base32;
140 int big_endian = 0;
141
142 #ifdef TARGET_WORDS_BIGENDIAN
143 big_endian = 1;
144 #endif
145
146 /* Boots a kernel elf binary. */
147 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
148 &entry, NULL, &high, NULL,
149 big_endian, EM_MICROBLAZE, 0, 0);
150 base32 = entry;
151 if (base32 == 0xc0000000) {
152 kernel_size = load_elf(kernel_filename, NULL,
153 translate_kernel_address, NULL,
154 &entry, NULL, NULL, NULL,
155 big_endian, EM_MICROBLAZE, 0, 0);
156 }
157 /* Always boot into physical ram. */
158 boot_info.bootstrap_pc = (uint32_t)entry;
159
160 /* If it wasn't an ELF image, try an u-boot image. */
161 if (kernel_size < 0) {
162 hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
163
164 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
165 NULL, NULL);
166 boot_info.bootstrap_pc = uentry;
167 high = (loadaddr + kernel_size + 3) & ~3;
168 }
169
170 /* Not an ELF image nor an u-boot image, try a RAW image. */
171 if (kernel_size < 0) {
172 kernel_size = load_image_targphys(kernel_filename, ddr_base,
173 ram_size);
174 boot_info.bootstrap_pc = ddr_base;
175 high = (ddr_base + kernel_size + 3) & ~3;
176 }
177
178 if (initrd_filename) {
179 int initrd_size;
180 uint32_t initrd_offset;
181
182 high = ROUND_UP(high + kernel_size, 4);
183 boot_info.initrd_start = high;
184 initrd_offset = boot_info.initrd_start - ddr_base;
185
186 initrd_size = load_ramdisk(initrd_filename,
187 boot_info.initrd_start,
188 ram_size - initrd_offset);
189 if (initrd_size < 0) {
190 initrd_size = load_image_targphys(initrd_filename,
191 boot_info.initrd_start,
192 ram_size - initrd_offset);
193 }
194 if (initrd_size < 0) {
195 error_report("could not load initrd '%s'",
196 initrd_filename);
197 exit(EXIT_FAILURE);
198 }
199 boot_info.initrd_end = boot_info.initrd_start + initrd_size;
200 high = ROUND_UP(high + initrd_size, 4);
201 }
202
203 boot_info.cmdline = high + 4096;
204 if (kernel_cmdline && strlen(kernel_cmdline)) {
205 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
206 }
207 /* Provide a device-tree. */
208 boot_info.fdt = boot_info.cmdline + 4096;
209 microblaze_load_dtb(boot_info.fdt, ram_size,
210 boot_info.initrd_start,
211 boot_info.initrd_end,
212 kernel_cmdline,
213 /* Preference a -dtb argument */
214 dtb_arg ? dtb_arg : filename);
215 }
216 g_free(filename);
217 }