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Diffstat (limited to 'hw/microblaze/boot.c')
| -rw-r--r-- | hw/microblaze/boot.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c new file mode 100644 index 000000000..e13b3e13b --- /dev/null +++ b/hw/microblaze/boot.c @@ -0,0 +1,177 @@ +/* + * Microblaze kernel loader + * + * Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com> + * Copyright (c) 2012 PetaLogix + * Copyright (c) 2009 Edgar E. Iglesias. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "qemu/option.h" +#include "qemu/config-file.h" +#include "qemu-common.h" +#include "sysemu/device_tree.h" +#include "hw/loader.h" +#include "elf.h" + +#include "hw/microblaze_boot.h" + +static struct +{ + void (*machine_cpu_reset)(MicroBlazeCPU *); + uint32_t bootstrap_pc; + uint32_t cmdline; + uint32_t fdt; +} boot_info; + +static void main_cpu_reset(void *opaque) +{ + MicroBlazeCPU *cpu = opaque; + CPUMBState *env = &cpu->env; + + cpu_reset(CPU(cpu)); + env->regs[5] = boot_info.cmdline; + env->regs[7] = boot_info.fdt; + env->sregs[SR_PC] = boot_info.bootstrap_pc; + if (boot_info.machine_cpu_reset) { + boot_info.machine_cpu_reset(cpu); + } +} + +static int microblaze_load_dtb(hwaddr addr, + uint32_t ramsize, + const char *kernel_cmdline, + const char *dtb_filename) +{ + int fdt_size; +#ifdef CONFIG_FDT + void *fdt = NULL; + int r; + + if (dtb_filename) { + fdt = load_device_tree(dtb_filename, &fdt_size); + } + if (!fdt) { + return 0; + } + + if (kernel_cmdline) { + r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", + kernel_cmdline); + if (r < 0) { + fprintf(stderr, "couldn't set /chosen/bootargs\n"); + } + } + + cpu_physical_memory_write(addr, (void *)fdt, fdt_size); +#else + /* We lack libfdt so we cannot manipulate the fdt. Just pass on the blob + to the kernel. */ + if (dtb_filename) { + fdt_size = load_image_targphys(dtb_filename, addr, 0x10000); + } + if (kernel_cmdline) { + fprintf(stderr, + "Warning: missing libfdt, cannot pass cmdline to kernel!\n"); + } +#endif + return fdt_size; +} + +static uint64_t translate_kernel_address(void *opaque, uint64_t addr) +{ + return addr - 0x30000000LL; +} + +void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base, + uint32_t ramsize, const char *dtb_filename, + void (*machine_cpu_reset)(MicroBlazeCPU *)) +{ + QemuOpts *machine_opts; + const char *kernel_filename = NULL; + const char *kernel_cmdline = NULL; + + machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0); + if (machine_opts) { + const char *dtb_arg; + kernel_filename = qemu_opt_get(machine_opts, "kernel"); + kernel_cmdline = qemu_opt_get(machine_opts, "append"); + dtb_arg = qemu_opt_get(machine_opts, "dtb"); + if (dtb_arg) { /* Preference a -dtb argument */ + dtb_filename = dtb_arg; + } else { /* default to pcbios dtb as passed by machine_init */ + dtb_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename); + } + } + + boot_info.machine_cpu_reset = machine_cpu_reset; + qemu_register_reset(main_cpu_reset, cpu); + + if (kernel_filename) { + int kernel_size; + uint64_t entry, low, high; + uint32_t base32; + int big_endian = 0; + +#ifdef TARGET_WORDS_BIGENDIAN + big_endian = 1; +#endif + + /* Boots a kernel elf binary. */ + kernel_size = load_elf(kernel_filename, NULL, NULL, + &entry, &low, &high, + big_endian, ELF_MACHINE, 0); + base32 = entry; + if (base32 == 0xc0000000) { + kernel_size = load_elf(kernel_filename, translate_kernel_address, + NULL, &entry, NULL, NULL, + big_endian, ELF_MACHINE, 0); + } + /* Always boot into physical ram. */ + boot_info.bootstrap_pc = ddr_base + (entry & 0x0fffffff); + + /* If it wasn't an ELF image, try an u-boot image. */ + if (kernel_size < 0) { + hwaddr uentry, loadaddr; + + kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0); + boot_info.bootstrap_pc = uentry; + high = (loadaddr + kernel_size + 3) & ~3; + } + + /* Not an ELF image nor an u-boot image, try a RAW image. */ + if (kernel_size < 0) { + kernel_size = load_image_targphys(kernel_filename, ddr_base, + ram_size); + boot_info.bootstrap_pc = ddr_base; + high = (ddr_base + kernel_size + 3) & ~3; + } + + boot_info.cmdline = high + 4096; + if (kernel_cmdline && strlen(kernel_cmdline)) { + pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline); + } + /* Provide a device-tree. */ + boot_info.fdt = boot_info.cmdline + 4096; + microblaze_load_dtb(boot_info.fdt, ram_size, kernel_cmdline, + dtb_filename); + } + +} |