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https://github.com/Motorhead1991/qemu.git
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8fd2518ef2
Currently we handle the 'dumpdtb' machine sub-option ad-hoc in every board model that has an FDT. It's up to the board code to make sure it calls qemu_fdt_dumpdtb() in the right place. This means we're inconsistent and often just ignore the user's command line argument: * if the board doesn't have an FDT at all * if the board supports FDT, but there happens not to be one present (usually because of a missing -fdt option) This isn't very helpful because it gives the user no clue why their option was ignored. However, in order to support the QMP/HMP dumpdtb commands we require now that every FDT machine stores a pointer to the FDT in MachineState::fdt. This means we can handle -machine dumpdtb centrally by calling the qmp_dumpdtb() function, unifying its handling with the QMP/HMP commands. All the board code calls to qemu_fdt_dumpdtb() can then be removed. For this commit we retain the existing behaviour that if there is no FDT we silently ignore the -machine dumpdtb option. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* QEMU OpenRISC boot helpers.
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*
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* (c) 2022 Stafford Horne <shorne@gmail.com>
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/cpu-defs.h"
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#include "elf.h"
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#include "hw/loader.h"
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#include "hw/openrisc/boot.h"
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#include "system/device_tree.h"
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#include "system/qtest.h"
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#include "system/reset.h"
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#include "qemu/error-report.h"
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#include <libfdt.h>
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#define KERNEL_LOAD_ADDR 0x100
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hwaddr openrisc_load_kernel(ram_addr_t ram_size,
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const char *kernel_filename,
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uint32_t *bootstrap_pc)
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{
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long kernel_size;
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uint64_t elf_entry;
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uint64_t high_addr;
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hwaddr entry;
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if (kernel_filename && !qtest_enabled()) {
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kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
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&elf_entry, NULL, &high_addr, NULL, ELFDATA2MSB,
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EM_OPENRISC, 1, 0);
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entry = elf_entry;
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if (kernel_size < 0) {
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kernel_size = load_uimage(kernel_filename,
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&entry, NULL, NULL, NULL, NULL);
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high_addr = entry + kernel_size;
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}
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if (kernel_size < 0) {
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kernel_size = load_image_targphys(kernel_filename,
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KERNEL_LOAD_ADDR,
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ram_size - KERNEL_LOAD_ADDR);
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high_addr = KERNEL_LOAD_ADDR + kernel_size;
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}
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if (entry <= 0) {
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entry = KERNEL_LOAD_ADDR;
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}
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if (kernel_size < 0) {
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error_report("couldn't load the kernel '%s'", kernel_filename);
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exit(1);
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}
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*bootstrap_pc = entry;
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return high_addr;
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}
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return 0;
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}
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hwaddr openrisc_load_initrd(void *fdt, const char *filename,
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hwaddr load_start, uint64_t mem_size)
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{
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int size;
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hwaddr start;
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/* We put the initrd right after the kernel; page aligned. */
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start = TARGET_PAGE_ALIGN(load_start);
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size = load_ramdisk(filename, start, mem_size - start);
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if (size < 0) {
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size = load_image_targphys(filename, start, mem_size - start);
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if (size < 0) {
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error_report("could not load ramdisk '%s'", filename);
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exit(1);
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}
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}
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if (fdt) {
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qemu_fdt_setprop_cell(fdt, "/chosen",
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"linux,initrd-start", start);
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qemu_fdt_setprop_cell(fdt, "/chosen",
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"linux,initrd-end", start + size);
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}
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return start + size;
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}
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uint32_t openrisc_load_fdt(MachineState *ms, void *fdt,
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hwaddr load_start, uint64_t mem_size)
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{
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uint32_t fdt_addr;
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int ret;
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int fdtsize = fdt_totalsize(fdt);
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if (fdtsize <= 0) {
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error_report("invalid device-tree");
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exit(1);
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}
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/* We put fdt right after the kernel and/or initrd. */
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fdt_addr = TARGET_PAGE_ALIGN(load_start);
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ret = fdt_pack(fdt);
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/* Should only fail if we've built a corrupted tree */
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g_assert(ret == 0);
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/* copy in the device tree */
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/* Save FDT for dumpdtb monitor command */
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ms->fdt = fdt;
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rom_add_blob_fixed_as("fdt", fdt, fdtsize, fdt_addr,
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&address_space_memory);
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qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds,
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rom_ptr_for_as(&address_space_memory, fdt_addr, fdtsize));
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return fdt_addr;
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}
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