target/mips: Remove XBurst Media eXtension Unit dead code
[qemu/ar7.git] / hw / microblaze / boot.c
blobcaaba1aa4c1d75d49ddc9f5dc03c4776bf1bef5b
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  */
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/boards.h"
38 #include "hw/loader.h"
39 #include "elf.h"
40 #include "qemu/cutils.h"
42 #include "boot.h"
44 static struct
46     void (*machine_cpu_reset)(MicroBlazeCPU *);
47     uint32_t bootstrap_pc;
48     uint32_t cmdline;
49     uint32_t initrd_start;
50     uint32_t initrd_end;
51     uint32_t fdt;
52 } boot_info;
54 static void main_cpu_reset(void *opaque)
56     MicroBlazeCPU *cpu = opaque;
57     CPUState *cs = CPU(cpu);
58     CPUMBState *env = &cpu->env;
60     cpu_reset(cs);
61     env->regs[5] = boot_info.cmdline;
62     env->regs[6] = boot_info.initrd_start;
63     env->regs[7] = boot_info.fdt;
64     cpu_set_pc(cs, boot_info.bootstrap_pc);
65     if (boot_info.machine_cpu_reset) {
66         boot_info.machine_cpu_reset(cpu);
67     }
70 static int microblaze_load_dtb(hwaddr addr,
71                                uint32_t ramsize,
72                                uint32_t initrd_start,
73                                uint32_t initrd_end,
74                                const char *kernel_cmdline,
75                                const char *dtb_filename)
77     int fdt_size;
78     void *fdt = NULL;
79     int r;
81     if (dtb_filename) {
82         fdt = load_device_tree(dtb_filename, &fdt_size);
83     }
84     if (!fdt) {
85         return 0;
86     }
88     if (kernel_cmdline) {
89         r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
90                                     kernel_cmdline);
91         if (r < 0) {
92             fprintf(stderr, "couldn't set /chosen/bootargs\n");
93         }
94     }
96     if (initrd_start) {
97         qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
98                               initrd_start);
100         qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
101                               initrd_end);
102     }
104     cpu_physical_memory_write(addr, fdt, fdt_size);
105     g_free(fdt);
106     return fdt_size;
109 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
111     return addr - 0x30000000LL;
114 void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
115                             uint32_t ramsize,
116                             const char *initrd_filename,
117                             const char *dtb_filename,
118                             void (*machine_cpu_reset)(MicroBlazeCPU *))
120     const char *kernel_filename;
121     const char *kernel_cmdline;
122     const char *dtb_arg;
123     char *filename = NULL;
125     kernel_filename = current_machine->kernel_filename;
126     kernel_cmdline = current_machine->kernel_cmdline;
127     dtb_arg = current_machine->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     }
133     boot_info.machine_cpu_reset = machine_cpu_reset;
134     qemu_register_reset(main_cpu_reset, cpu);
136     if (kernel_filename) {
137         int kernel_size;
138         uint64_t entry, high;
139         uint32_t base32;
140         int big_endian = 0;
142 #ifdef TARGET_WORDS_BIGENDIAN
143         big_endian = 1;
144 #endif
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;
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;
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         }
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                                               ramsize);
174             boot_info.bootstrap_pc = ddr_base;
175             high = (ddr_base + kernel_size + 3) & ~3;
176         }
178         if (initrd_filename) {
179             int initrd_size;
180             uint32_t initrd_offset;
182             high = ROUND_UP(high + kernel_size, 4);
183             boot_info.initrd_start = high;
184             initrd_offset = boot_info.initrd_start - ddr_base;
186             initrd_size = load_ramdisk(initrd_filename,
187                                        boot_info.initrd_start,
188                                        ramsize - initrd_offset);
189             if (initrd_size < 0) {
190                 initrd_size = load_image_targphys(initrd_filename,
191                                                   boot_info.initrd_start,
192                                                   ramsize - 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         }
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, ramsize,
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);