vl: extract machine done notifiers
[qemu/ar7.git] / hw / microblaze / boot.c
blob6715ba2ff96b3114166d769f81d3abc599f99eef
1 /*
2 * Microblaze kernel loader
4 * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
5 * Copyright (c) 2012 PetaLogix
6 * Copyright (c) 2009 Edgar E. Iglesias.
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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.
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 "sysemu/sysemu.h"
37 #include "hw/loader.h"
38 #include "elf.h"
39 #include "qemu/cutils.h"
41 #include "boot.h"
43 static struct
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;
53 static void main_cpu_reset(void *opaque)
55 MicroBlazeCPU *cpu = opaque;
56 CPUState *cs = CPU(cpu);
57 CPUMBState *env = &cpu->env;
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);
69 static 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)
76 int fdt_size;
77 void *fdt = NULL;
78 int r;
80 if (dtb_filename) {
81 fdt = load_device_tree(dtb_filename, &fdt_size);
83 if (!fdt) {
84 return 0;
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");
95 if (initrd_start) {
96 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
97 initrd_start);
99 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
100 initrd_end);
103 cpu_physical_memory_write(addr, fdt, fdt_size);
104 g_free(fdt);
105 return fdt_size;
108 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
110 return addr - 0x30000000LL;
113 void 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 *))
119 QemuOpts *machine_opts;
120 const char *kernel_filename;
121 const char *kernel_cmdline;
122 const char *dtb_arg;
123 char *filename = NULL;
125 machine_opts = qemu_get_machine_opts();
126 kernel_filename = qemu_opt_get(machine_opts, "kernel");
127 kernel_cmdline = qemu_opt_get(machine_opts, "append");
128 dtb_arg = qemu_opt_get(machine_opts, "dtb");
129 /* default to pcbios dtb as passed by machine_init */
130 if (!dtb_arg && dtb_filename) {
131 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
134 boot_info.machine_cpu_reset = machine_cpu_reset;
135 qemu_register_reset(main_cpu_reset, cpu);
137 if (kernel_filename) {
138 int kernel_size;
139 uint64_t entry, high;
140 uint32_t base32;
141 int big_endian = 0;
143 #ifdef TARGET_WORDS_BIGENDIAN
144 big_endian = 1;
145 #endif
147 /* Boots a kernel elf binary. */
148 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
149 &entry, NULL, &high, NULL,
150 big_endian, EM_MICROBLAZE, 0, 0);
151 base32 = entry;
152 if (base32 == 0xc0000000) {
153 kernel_size = load_elf(kernel_filename, NULL,
154 translate_kernel_address, NULL,
155 &entry, NULL, NULL, NULL,
156 big_endian, EM_MICROBLAZE, 0, 0);
158 /* Always boot into physical ram. */
159 boot_info.bootstrap_pc = (uint32_t)entry;
161 /* If it wasn't an ELF image, try an u-boot image. */
162 if (kernel_size < 0) {
163 hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
165 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
166 NULL, NULL);
167 boot_info.bootstrap_pc = uentry;
168 high = (loadaddr + kernel_size + 3) & ~3;
171 /* Not an ELF image nor an u-boot image, try a RAW image. */
172 if (kernel_size < 0) {
173 kernel_size = load_image_targphys(kernel_filename, ddr_base,
174 ramsize);
175 boot_info.bootstrap_pc = ddr_base;
176 high = (ddr_base + kernel_size + 3) & ~3;
179 if (initrd_filename) {
180 int initrd_size;
181 uint32_t initrd_offset;
183 high = ROUND_UP(high + kernel_size, 4);
184 boot_info.initrd_start = high;
185 initrd_offset = boot_info.initrd_start - ddr_base;
187 initrd_size = load_ramdisk(initrd_filename,
188 boot_info.initrd_start,
189 ramsize - initrd_offset);
190 if (initrd_size < 0) {
191 initrd_size = load_image_targphys(initrd_filename,
192 boot_info.initrd_start,
193 ramsize - initrd_offset);
195 if (initrd_size < 0) {
196 error_report("could not load initrd '%s'",
197 initrd_filename);
198 exit(EXIT_FAILURE);
200 boot_info.initrd_end = boot_info.initrd_start + initrd_size;
201 high = ROUND_UP(high + initrd_size, 4);
204 boot_info.cmdline = high + 4096;
205 if (kernel_cmdline && strlen(kernel_cmdline)) {
206 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
208 /* Provide a device-tree. */
209 boot_info.fdt = boot_info.cmdline + 4096;
210 microblaze_load_dtb(boot_info.fdt, ramsize,
211 boot_info.initrd_start,
212 boot_info.initrd_end,
213 kernel_cmdline,
214 /* Preference a -dtb argument */
215 dtb_arg ? dtb_arg : filename);
217 g_free(filename);