f831f955d4
noload kernels are loaded with the u-boot image header and as a result the header size needs adding to the entry point. Fake up a hdr so the kernel image is loaded at the right address and the entry point is adjusted appropriately. The default location for the uboot file is 32MiB above bottom of DRAM. This matches the recommendation in Documentation/arm/Booting. Clarify the load_uimage API to state the passing of a load address when an image doesn't specify one, or when loading a ramdisk is expected. Adjust callers of load_uimage, etc. Signed-off-by: Nick Hudson <skrll@netbsd.org> Message-id: 11488a08-1fe0-a278-2210-deb64731107f@gmx.co.uk Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
215 lines
7.3 KiB
C
215 lines
7.3 KiB
C
/*
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* Microblaze kernel loader
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*
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* Copyright (c) 2012 Peter Crosthwaite <peter.crosthwaite@petalogix.com>
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* Copyright (c) 2012 PetaLogix
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* Copyright (c) 2009 Edgar E. Iglesias.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "cpu.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "qemu/error-report.h"
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#include "sysemu/device_tree.h"
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#include "sysemu/sysemu.h"
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#include "hw/loader.h"
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#include "elf.h"
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#include "qemu/cutils.h"
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#include "boot.h"
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static struct
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{
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void (*machine_cpu_reset)(MicroBlazeCPU *);
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uint32_t bootstrap_pc;
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uint32_t cmdline;
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uint32_t initrd_start;
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uint32_t initrd_end;
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uint32_t fdt;
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} boot_info;
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static void main_cpu_reset(void *opaque)
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{
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MicroBlazeCPU *cpu = opaque;
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CPUState *cs = CPU(cpu);
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CPUMBState *env = &cpu->env;
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cpu_reset(cs);
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env->regs[5] = boot_info.cmdline;
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env->regs[6] = boot_info.initrd_start;
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env->regs[7] = boot_info.fdt;
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cpu_set_pc(cs, boot_info.bootstrap_pc);
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if (boot_info.machine_cpu_reset) {
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boot_info.machine_cpu_reset(cpu);
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}
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}
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static int microblaze_load_dtb(hwaddr addr,
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uint32_t ramsize,
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uint32_t initrd_start,
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uint32_t initrd_end,
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const char *kernel_cmdline,
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const char *dtb_filename)
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{
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int fdt_size;
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void *fdt = NULL;
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int r;
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if (dtb_filename) {
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fdt = load_device_tree(dtb_filename, &fdt_size);
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}
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if (!fdt) {
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return 0;
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}
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if (kernel_cmdline) {
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r = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
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kernel_cmdline);
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if (r < 0) {
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fprintf(stderr, "couldn't set /chosen/bootargs\n");
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}
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}
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if (initrd_start) {
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qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
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initrd_start);
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qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
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initrd_end);
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}
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cpu_physical_memory_write(addr, fdt, fdt_size);
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return fdt_size;
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}
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static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
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{
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return addr - 0x30000000LL;
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}
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void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
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uint32_t ramsize,
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const char *initrd_filename,
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const char *dtb_filename,
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void (*machine_cpu_reset)(MicroBlazeCPU *))
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{
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QemuOpts *machine_opts;
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const char *kernel_filename;
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const char *kernel_cmdline;
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const char *dtb_arg;
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char *filename = NULL;
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machine_opts = qemu_get_machine_opts();
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kernel_filename = qemu_opt_get(machine_opts, "kernel");
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kernel_cmdline = qemu_opt_get(machine_opts, "append");
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dtb_arg = qemu_opt_get(machine_opts, "dtb");
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/* default to pcbios dtb as passed by machine_init */
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if (!dtb_arg && dtb_filename) {
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filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, dtb_filename);
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}
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boot_info.machine_cpu_reset = machine_cpu_reset;
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qemu_register_reset(main_cpu_reset, cpu);
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if (kernel_filename) {
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int kernel_size;
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uint64_t entry, low, high;
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uint32_t base32;
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int big_endian = 0;
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#ifdef TARGET_WORDS_BIGENDIAN
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big_endian = 1;
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#endif
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/* Boots a kernel elf binary. */
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kernel_size = load_elf(kernel_filename, NULL, NULL,
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&entry, &low, &high,
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big_endian, EM_MICROBLAZE, 0, 0);
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base32 = entry;
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if (base32 == 0xc0000000) {
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kernel_size = load_elf(kernel_filename, translate_kernel_address,
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NULL, &entry, NULL, NULL,
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big_endian, EM_MICROBLAZE, 0, 0);
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}
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/* Always boot into physical ram. */
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boot_info.bootstrap_pc = (uint32_t)entry;
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/* If it wasn't an ELF image, try an u-boot image. */
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if (kernel_size < 0) {
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hwaddr uentry, loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
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kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr, 0,
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NULL, NULL);
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boot_info.bootstrap_pc = uentry;
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high = (loadaddr + kernel_size + 3) & ~3;
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}
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/* Not an ELF image nor an u-boot image, try a RAW image. */
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if (kernel_size < 0) {
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kernel_size = load_image_targphys(kernel_filename, ddr_base,
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ram_size);
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boot_info.bootstrap_pc = ddr_base;
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high = (ddr_base + kernel_size + 3) & ~3;
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}
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if (initrd_filename) {
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int initrd_size;
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uint32_t initrd_offset;
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high = ROUND_UP(high + kernel_size, 4);
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boot_info.initrd_start = high;
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initrd_offset = boot_info.initrd_start - ddr_base;
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initrd_size = load_ramdisk(initrd_filename,
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boot_info.initrd_start,
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ram_size - initrd_offset);
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if (initrd_size < 0) {
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initrd_size = load_image_targphys(initrd_filename,
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boot_info.initrd_start,
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ram_size - initrd_offset);
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}
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if (initrd_size < 0) {
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error_report("could not load initrd '%s'",
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initrd_filename);
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exit(EXIT_FAILURE);
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}
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boot_info.initrd_end = boot_info.initrd_start + initrd_size;
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high = ROUND_UP(high + initrd_size, 4);
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}
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boot_info.cmdline = high + 4096;
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if (kernel_cmdline && strlen(kernel_cmdline)) {
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pstrcpy_targphys("cmdline", boot_info.cmdline, 256, kernel_cmdline);
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}
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/* Provide a device-tree. */
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boot_info.fdt = boot_info.cmdline + 4096;
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microblaze_load_dtb(boot_info.fdt, ram_size,
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boot_info.initrd_start,
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boot_info.initrd_end,
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kernel_cmdline,
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/* Preference a -dtb argument */
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dtb_arg ? dtb_arg : filename);
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}
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g_free(filename);
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}
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