1 files changed, 117 insertions, 0 deletions
diff --git a/kexec/arch/loongarch/kexec-pei-loongarch.c b/kexec/arch/loongarch/kexec-pei-loongarch.c
new file mode 100644
index 0000000..f86ac61
--- /dev/null
+++ b/kexec/arch/loongarch/kexec-pei-loongarch.c
@@ -0,0 +1,117 @@
+/*
+ * LoongArch kexec PE format binary image support.
+ *
+ * Copyright (C) 2022 Loongson Technology Corporation Limited.
+ *   Youling Tang <tangyouling@loongson.cn>
+ *
+ * derived from kexec-image-arm64.c
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2.  See the file COPYING for more details.
+ */
+
+#define _GNU_SOURCE
+
+#include <limits.h>
+#include <errno.h>
+#include <elf.h>
+
+#include "kexec.h"
+#include "kexec-elf.h"
+#include "image-header.h"
+#include "kexec-syscall.h"
+#include "crashdump-loongarch.h"
+#include "kexec-loongarch.h"
+#include "arch/options.h"
+
+int pei_loongarch_probe(const char *kernel_buf, off_t kernel_size)
+{
+	const struct loongarch_image_header *h;
+
+	if (kernel_size < sizeof(struct loongarch_image_header)) {
+		dbgprintf("%s: No loongarch image header.\n", __func__);
+		return -1;
+	}
+
+	h = (const struct loongarch_image_header *)(kernel_buf);
+
+	if (!loongarch_header_check_pe_sig(h)) {
+		dbgprintf("%s: Bad loongarch PE image header.\n", __func__);
+		return -1;
+	}
+
+	return 0;
+}
+
+int pei_loongarch_load(int argc, char **argv, const char *buf,
+	off_t len, struct kexec_info *info)
+{
+	int result;
+	unsigned long hole_min = 0;
+	unsigned long kernel_segment, kernel_entry;
+	const struct loongarch_image_header *header;
+
+	header = (const struct loongarch_image_header *)(buf);
+
+	if (loongarch_process_image_header(header))
+		return EFAILED;
+
+	kernel_segment = loongarch_locate_kernel_segment(info);
+
+	if (kernel_segment == ULONG_MAX) {
+		dbgprintf("%s: Kernel segment is not allocated\n", __func__);
+		result = EFAILED;
+		goto exit;
+	}
+
+	kernel_entry = virt_to_phys(loongarch_header_kernel_entry(header));
+
+	dbgprintf("%s: kernel_segment: %016lx\n", __func__, kernel_segment);
+	dbgprintf("%s: kernel_entry:   %016lx\n", __func__, kernel_entry);
+	dbgprintf("%s: image_size:     %016lx\n", __func__,
+		loongarch_mem.image_size);
+	dbgprintf("%s: text_offset:    %016lx\n", __func__,
+		loongarch_mem.text_offset);
+	dbgprintf("%s: phys_offset:    %016lx\n", __func__,
+		loongarch_mem.phys_offset);
+	dbgprintf("%s: PE format:      %s\n", __func__,
+		(loongarch_header_check_pe_sig(header) ? "yes" : "no"));
+
+	/* Get kernel entry point */
+	info->entry = (void *)kernel_entry;
+
+	hole_min = kernel_segment + loongarch_mem.image_size;
+
+	/* Create and initialize elf core header segment */
+	if (info->kexec_flags & KEXEC_ON_CRASH) {
+		result = load_crashdump_segments(info);
+		if (result) {
+			dbgprintf("%s: Creating eflcorehdr failed.\n",
+								__func__);
+			goto exit;
+		}
+	}
+
+	/* Load the kernel */
+	add_segment(info, buf, len, kernel_segment, loongarch_mem.image_size);
+
+	/* Prepare and load dtb and initrd data */
+	result = loongarch_load_other_segments(info, hole_min);
+	if (result) {
+		fprintf(stderr, "kexec: Load dtb and initrd segments failed.\n");
+		goto exit;
+	}
+
+exit:
+	if (result)
+		fprintf(stderr, "kexec: load failed.\n");
+
+	return result;
+}
+
+void pei_loongarch_usage(void)
+{
+	printf(
+"     An LoongArch PE format binary image, uncompressed, little endian.\n"
+"     Typically a vmlinux.efi file.\n\n");
+}