2 * Microblaze kernel loader
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
27 #include "qemu-option.h"
28 #include "qemu-config.h"
29 #include "qemu-common.h"
30 #include "device_tree.h"
34 #include "microblaze_boot.h"
38 void (*machine_cpu_reset)(MicroBlazeCPU *);
39 uint32_t bootstrap_pc;
44 static void main_cpu_reset(void *opaque)
46 MicroBlazeCPU *cpu = opaque;
47 CPUMBState *env = &cpu->env;
50 env->regs[5] = boot_info.cmdline;
51 env->regs[7] = boot_info.fdt;
52 env->sregs[SR_PC] = boot_info.bootstrap_pc;
53 if (boot_info.machine_cpu_reset) {
54 boot_info.machine_cpu_reset(cpu);
58 static int microblaze_load_dtb(target_phys_addr_t addr,
60 const char *kernel_cmdline,
61 const char *dtb_filename)
69 fdt = load_device_tree(dtb_filename, &fdt_size);
76 r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
79 fprintf(stderr, "couldn't set /chosen/bootargs\n");
83 cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
85 /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob
88 fdt_size = load_image_targphys(dtb_filename, addr, 0x10000);
92 "Warning: missing libfdt, cannot pass cmdline to kernel!\n");
98 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
100 return addr - 0x30000000LL;
103 void microblaze_load_kernel(MicroBlazeCPU *cpu, target_phys_addr_t ddr_base,
104 uint32_t ramsize, const char *dtb_filename,
105 void (*machine_cpu_reset)(MicroBlazeCPU *))
107 QemuOpts *machine_opts;
108 const char *kernel_filename = NULL;
109 const char *kernel_cmdline = NULL;
111 machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
114 kernel_filename = qemu_opt_get(machine_opts, "kernel");
115 kernel_cmdline = qemu_opt_get(machine_opts, "append");
116 dtb_arg = qemu_opt_get(machine_opts, "dtb");
117 if (dtb_arg) { /* Preference a -dtb argument */
118 dtb_filename = dtb_arg;
119 } else { /* default to pcbios dtb as passed by machine_init */
120 dtb_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
124 boot_info.machine_cpu_reset = machine_cpu_reset;
125 qemu_register_reset(main_cpu_reset, cpu);
127 if (kernel_filename) {
129 uint64_t entry, low, high;
133 #ifdef TARGET_WORDS_BIGENDIAN
137 /* Boots a kernel elf binary. */
138 kernel_size = load_elf(kernel_filename, NULL, NULL,
140 big_endian, ELF_MACHINE, 0);
142 if (base32 == 0xc0000000) {
143 kernel_size = load_elf(kernel_filename, translate_kernel_address,
144 NULL, &entry, NULL, NULL,
145 big_endian, ELF_MACHINE, 0);
147 /* Always boot into physical ram. */
148 boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff);
150 /* If it wasn't an ELF image, try an u-boot image. */
151 if (kernel_size < 0) {
152 target_phys_addr_t uentry, loadaddr;
154 kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0);
155 boot_info.bootstrap_pc = uentry;
156 high = (loadaddr + kernel_size + 3) & ~3;
159 /* Not an ELF image nor an u-boot image, try a RAW image. */
160 if (kernel_size < 0) {
161 kernel_size = load_image_targphys(kernel_filename, ddr_base,
163 boot_info.bootstrap_pc = ddr_base;
164 high = (ddr_base + kernel_size + 3) & ~3;
167 boot_info.cmdline = high + 4096;
168 if (kernel_cmdline && strlen(kernel_cmdline)) {
169 pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
171 /* Provide a device-tree. */
172 boot_info.fdt = boot_info.cmdline + 4096;
173 microblaze_load_dtb(boot_info.fdt, ram_size, kernel_cmdline,