--- /dev/null
+/*
+ * 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/error-report.h"
+#include "qemu-common.h"
+#include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
+#include "hw/loader.h"
+#include "elf.h"
+
+#include "boot.h"
+
+static struct
+{
+ void (*machine_cpu_reset)(MicroBlazeCPU *);
+ uint32_t bootstrap_pc;
+ uint32_t cmdline;
+ uint32_t initrd_start;
+ uint32_t initrd_end;
+ uint32_t fdt;
+} boot_info;
+
+static void main_cpu_reset(void *opaque)
+{
+ MicroBlazeCPU *cpu = opaque;
+ CPUState *cs = CPU(cpu);
+ CPUMBState *env = &cpu->env;
+
+ cpu_reset(cs);
+ env->regs[5] = boot_info.cmdline;
+ env->regs[6] = boot_info.initrd_start;
+ env->regs[7] = boot_info.fdt;
+ cpu_set_pc(cs, 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,
+ uint32_t initrd_start,
+ uint32_t initrd_end,
+ const char *kernel_cmdline,
+ const char *dtb_filename)
+{
+ int fdt_size;
+ 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_fdt_setprop_string(fdt, "/chosen", "bootargs",
+ kernel_cmdline);
+ if (r < 0) {
+ fprintf(stderr, "couldn't set /chosen/bootargs\n");
+ }
+ }
+
+ if (initrd_start) {
+ qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
+ initrd_start);
+
+ qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
+ initrd_end);
+ }
+
+ cpu_physical_memory_write(addr, fdt, fdt_size);
+ 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 *initrd_filename,
+ const char *dtb_filename,
+ void (*machine_cpu_reset)(MicroBlazeCPU *))
+{
+ QemuOpts *machine_opts;
+ const char *kernel_filename;
+ const char *kernel_cmdline;
+ const char *dtb_arg;
+ char *filename = NULL;
+
+ machine_opts = qemu_get_machine_opts();
+ kernel_filename = qemu_opt_get(machine_opts, "kernel");
+ kernel_cmdline = qemu_opt_get(machine_opts, "append");
+ dtb_arg = qemu_opt_get(machine_opts, "dtb");
+ /* default to pcbios dtb as passed by machine_init */
+ if (!dtb_arg) {
+ 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 = (uint32_t)entry;
+
+ /* 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,
+ NULL, NULL);
+ 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;
+ }
+
+ if (initrd_filename) {
+ int initrd_size;
+ uint32_t initrd_offset;
+
+ high = ROUND_UP(high + kernel_size, 4);
+ boot_info.initrd_start = high;
+ initrd_offset = boot_info.initrd_start - ddr_base;
+
+ initrd_size = load_ramdisk(initrd_filename,
+ boot_info.initrd_start,
+ ram_size - initrd_offset);
+ if (initrd_size < 0) {
+ initrd_size = load_image_targphys(initrd_filename,
+ boot_info.initrd_start,
+ ram_size - initrd_offset);
+ }
+ if (initrd_size < 0) {
+ error_report("qemu: could not load initrd '%s'",
+ initrd_filename);
+ exit(EXIT_FAILURE);
+ }
+ boot_info.initrd_end = boot_info.initrd_start + initrd_size;
+ high = ROUND_UP(high + initrd_size, 4);
+ }
+
+ 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,
+ boot_info.initrd_start,
+ boot_info.initrd_end,
+ kernel_cmdline,
+ /* Preference a -dtb argument */
+ dtb_arg ? dtb_arg : filename);
+ }
+ g_free(filename);
+}
Code Review / kvmfornfv.git / blobdiff