s390x/mmu: don't overwrite pending exception in mmu translate
[qemu/ar7.git] / hw / microblaze / boot.c
blob35bfeda7aa715f67a2b21c57323f77055944be5d
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 "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/sysemu.h"
35 #include "hw/loader.h"
36 #include "elf.h"
37 #include "qemu/cutils.h"
39 #include "boot.h"
41 static struct
43 void (*machine_cpu_reset)(MicroBlazeCPU *);
44 uint32_t bootstrap_pc;
45 uint32_t cmdline;
46 uint32_t initrd_start;
47 uint32_t initrd_end;
48 uint32_t fdt;
49 } boot_info;
51 static void main_cpu_reset(void *opaque)
53 MicroBlazeCPU *cpu = opaque;
54 CPUState *cs = CPU(cpu);
55 CPUMBState *env = &cpu->env;
57 cpu_reset(cs);
58 env->regs[5] = boot_info.cmdline;
59 env->regs[6] = boot_info.initrd_start;
60 env->regs[7] = boot_info.fdt;
61 cpu_set_pc(cs, boot_info.bootstrap_pc);
62 if (boot_info.machine_cpu_reset) {
63 boot_info.machine_cpu_reset(cpu);
67 static int microblaze_load_dtb(hwaddr addr,
68 uint32_t ramsize,
69 uint32_t initrd_start,
70 uint32_t initrd_end,
71 const char *kernel_cmdline,
72 const char *dtb_filename)
74 int fdt_size;
75 void *fdt = NULL;
76 int r;
78 if (dtb_filename) {
79 fdt = load_device_tree(dtb_filename, &fdt_size);
81 if (!fdt) {
82 return 0;
85 if (kernel_cmdline) {
86 r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
87 kernel_cmdline);
88 if (r < 0) {
89 fprintf(stderr, "couldn't set /chosen/bootargs\n");
93 if (initrd_start) {
94 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
95 initrd_start);
97 qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
98 initrd_end);
101 cpu_physical_memory_write(addr, fdt, fdt_size);
102 return fdt_size;
105 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
107 return addr - 0x30000000LL;
110 void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
111 uint32_t ramsize,
112 const char *initrd_filename,
113 const char *dtb_filename,
114 void (*machine_cpu_reset)(MicroBlazeCPU *))
116 QemuOpts *machine_opts;
117 const char *kernel_filename;
118 const char *kernel_cmdline;
119 const char *dtb_arg;
120 char *filename = NULL;
122 machine_opts = qemu_get_machine_opts();
123 kernel_filename = qemu_opt_get(machine_opts, "kernel");
124 kernel_cmdline = qemu_opt_get(machine_opts, "append");
125 dtb_arg = qemu_opt_get(machine_opts, "dtb");
126 /* default to pcbios dtb as passed by machine_init */
127 if (!dtb_arg && dtb_filename) {
128 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
131 boot_info.machine_cpu_reset = machine_cpu_reset;
132 qemu_register_reset(main_cpu_reset, cpu);
134 if (kernel_filename) {
135 int kernel_size;
136 uint64_t entry, low, high;
137 uint32_t base32;
138 int big_endian = 0;
140 #ifdef TARGET_WORDS_BIGENDIAN
141 big_endian = 1;
142 #endif
144 /* Boots a kernel elf binary. */
145 kernel_size = load_elf(kernel_filename, NULL, NULL,
146 &entry, &low, &high,
147 big_endian, EM_MICROBLAZE, 0, 0);
148 base32 = entry;
149 if (base32 == 0xc0000000) {
150 kernel_size = load_elf(kernel_filename, translate_kernel_address,
151 NULL, &entry, NULL, NULL,
152 big_endian, EM_MICROBLAZE, 0, 0);
154 /* Always boot into physical ram. */
155 boot_info.bootstrap_pc = (uint32_t)entry;
157 /* If it wasn't an ELF image, try an u-boot image. */
158 if (kernel_size < 0) {
159 hwaddr uentry, loadaddr;
161 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
162 NULL, NULL);
163 boot_info.bootstrap_pc = uentry;
164 high = (loadaddr + kernel_size + 3) & ~3;
167 /* Not an ELF image nor an u-boot image, try a RAW image. */
168 if (kernel_size < 0) {
169 kernel_size = load_image_targphys(kernel_filename, ddr_base,
170 ram_size);
171 boot_info.bootstrap_pc = ddr_base;
172 high = (ddr_base + kernel_size + 3) & ~3;
175 if (initrd_filename) {
176 int initrd_size;
177 uint32_t initrd_offset;
179 high = ROUND_UP(high + kernel_size, 4);
180 boot_info.initrd_start = high;
181 initrd_offset = boot_info.initrd_start - ddr_base;
183 initrd_size = load_ramdisk(initrd_filename,
184 boot_info.initrd_start,
185 ram_size - initrd_offset);
186 if (initrd_size < 0) {
187 initrd_size = load_image_targphys(initrd_filename,
188 boot_info.initrd_start,
189 ram_size - initrd_offset);
191 if (initrd_size < 0) {
192 error_report("could not load initrd '%s'",
193 initrd_filename);
194 exit(EXIT_FAILURE);
196 boot_info.initrd_end = boot_info.initrd_start + initrd_size;
197 high = ROUND_UP(high + initrd_size, 4);
200 boot_info.cmdline = high + 4096;
201 if (kernel_cmdline && strlen(kernel_cmdline)) {
202 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
204 /* Provide a device-tree. */
205 boot_info.fdt = boot_info.cmdline + 4096;
206 microblaze_load_dtb(boot_info.fdt, ram_size,
207 boot_info.initrd_start,
208 boot_info.initrd_end,
209 kernel_cmdline,
210 /* Preference a -dtb argument */
211 dtb_arg ? dtb_arg : filename);
213 g_free(filename);