From: Philippe Mathieu-Daudé <f4...@amsat.org>
Add avr_load_firmware() function to load firmware in ELF or
raw binary format.
[AM: Corrected the type of the variable containing e_flags]
Suggested-by: Aleksandar Markovic <aleksandar.m.m...@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org>
Signed-off-by: Aleksandar Markovic <aleksandar.m.m...@gmail.com>
---
hw/avr/Makefile.objs | 1 +
hw/avr/boot.c | 74
++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/avr/boot.h | 33 +++++++++++++++++++++++
include/elf.h | 2 ++
4 files changed, 110 insertions(+)
create mode 100644 hw/avr/Makefile.objs
create mode 100644 hw/avr/boot.c
create mode 100644 hw/avr/boot.h
diff --git a/hw/avr/Makefile.objs b/hw/avr/Makefile.objs
new file mode 100644
index 0000000..123f174
--- /dev/null
+++ b/hw/avr/Makefile.objs
@@ -0,0 +1 @@
+obj-y += boot.o
diff --git a/hw/avr/boot.c b/hw/avr/boot.c
new file mode 100644
index 0000000..9ac2c88
--- /dev/null
+++ b/hw/avr/boot.c
@@ -0,0 +1,74 @@
+/*
+ * AVR loader helpers
+ *
+ * Copyright (c) 2019 Philippe Mathieu-Daudé
+ *
+ * This work is licensed under the terms of the GNU GPLv2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "boot.h"
+#include "qemu/error-report.h"
+
+bool avr_load_firmware(AVRCPU *cpu, MachineState *ms,
+ MemoryRegion *mr, const char *firmware)
+{
+ const char *filename;
+ int bytes_loaded;
+ uint64_t entry;
+ uint32_t e_flags;
+
+ filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, firmware);
+ if (filename == NULL) {
+ error_report("Unable to find %s", firmware);
+ return false;
+ }
+
+ bytes_loaded = load_elf_ram_sym(filename,
+ NULL, NULL, NULL,
+ &entry, NULL, NULL,
+ &e_flags, 0, EM_AVR, 0, 0,
+ NULL, true, NULL);
+ if (bytes_loaded >= 0) {
+ /* If ELF file is provided, determine CPU type reading ELF e_flags. */
+ const char *elf_cpu = avr_flags_to_cpu_type(e_flags, NULL);
+ const char *mcu_cpu_type = object_get_typename(OBJECT(cpu));
+ int cpu_len = strlen(mcu_cpu_type) - strlen(AVR_CPU_TYPE_SUFFIX);
+
+ if (entry) {
+ error_report("BIOS entry_point must be 0x0000 "
+ "(ELF image '%s' has entry_point 0x%04" PRIx64 ")",
+ firmware, entry);
+ return false;
+ }
+ if (!elf_cpu) {
+ warn_report("Could not determine CPU type for ELF image '%s', "
+ "assuming '%.*s' CPU",
+ firmware, cpu_len, mcu_cpu_type);
+ return true;
+ }
+ if (strcmp(elf_cpu, mcu_cpu_type)) {
+ error_report("Current machine: %s with '%.*s' CPU",
+ MACHINE_GET_CLASS(ms)->desc, cpu_len, mcu_cpu_type);
+ error_report("ELF image '%s' is for '%.*s' CPU",
+ firmware,
+ (int)(strlen(elf_cpu) - strlen(AVR_CPU_TYPE_SUFFIX)),
+ elf_cpu);
+ return false;
+ }
+ } else {
+ bytes_loaded = load_image_targphys(filename, OFFSET_CODE,
+ memory_region_size(mr));
+ }
+ if (bytes_loaded < 0) {
+ error_report("Unable to load firmware image %s as ELF or raw binary",
+ firmware);
+ return false;
+ }
+ return true;
+}
diff --git a/hw/avr/boot.h b/hw/avr/boot.h
new file mode 100644
index 0000000..62bc10c
--- /dev/null
+++ b/hw/avr/boot.h
@@ -0,0 +1,33 @@
+/*
+ * AVR loader helpers
+ *
+ * Copyright (c) 2019 Philippe Mathieu-Daudé
+ *
+ * This work is licensed under the terms of the GNU GPLv2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_AVR_BOOT_H
+#define HW_AVR_BOOT_H
+
+#include "hw/boards.h"
+#include "cpu.h"
+
+/**
+ * avr_load_firmware: load an image into a memory region
+ *
+ * @cpu: Handle a AVR CPU object
+ * @ms: A MachineState
+ * @mr: Memory Region to load into
+ * @firmware: Path to the firmware file (raw binary or ELF format)
+ *
+ * Load a firmware supplied by the machine or by the user with the
+ * '-bios' command line option, and put it in target memory.
+ *
+ * Returns: true on success, false on error.
+ */
+bool avr_load_firmware(AVRCPU *cpu, MachineState *ms,
+ MemoryRegion *mr, const char *firmware);
+
+#endif
diff --git a/include/elf.h b/include/elf.h
index 8fbfe60..3f08f68 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -202,6 +202,8 @@ typedef struct mips_elf_abiflags_v0 {
#define EM_MOXIE 223 /* Moxie processor family */
#define EM_MOXIE_OLD 0xFEED
+#define EM_AVR 83 /* AVR 8-bit microcontroller */
