1 files changed, 83 insertions, 0 deletions
diff --git a/arch/s390/boot/decompressor.c b/arch/s390/boot/decompressor.c
new file mode 100644
index 000000000000..8d1bc25a6bf4
--- /dev/null
+++ b/arch/s390/boot/decompressor.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Definitions and wrapper functions for kernel decompressor
+ *
+ * Copyright IBM Corp. 2010
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <asm/boot_data.h>
+#include <asm/page.h>
+#include "decompressor.h"
+#include "boot.h"
+
+/*
+ * gzip declarations
+ */
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#undef memmove
+#define memmove memmove
+#define memzero(s, n) memset((s), 0, (n))
+
+#if defined(CONFIG_KERNEL_BZIP2)
+#define BOOT_HEAP_SIZE	0x400000
+#elif defined(CONFIG_KERNEL_ZSTD)
+#define BOOT_HEAP_SIZE	0x30000
+#else
+#define BOOT_HEAP_SIZE	0x10000
+#endif
+
+static unsigned long free_mem_ptr = (unsigned long) _end;
+static unsigned long free_mem_end_ptr = (unsigned long) _end + BOOT_HEAP_SIZE;
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZ4
+#include "../../../../lib/decompress_unlz4.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_XZ
+#include "../../../../lib/decompress_unxz.c"
+#endif
+
+#ifdef CONFIG_KERNEL_ZSTD
+#include "../../../../lib/decompress_unzstd.c"
+#endif
+
+static void decompress_error(char *m)
+{
+	if (bootdebug)
+		boot_rb_dump();
+	boot_panic("Decompression error: %s\n", m);
+}
+
+unsigned long mem_safe_offset(void)
+{
+	return ALIGN(free_mem_end_ptr, PAGE_SIZE);
+}
+
+void deploy_kernel(void *output)
+{
+	__decompress(_compressed_start, _compressed_end - _compressed_start,
+		     NULL, NULL, output, vmlinux.image_size, NULL, decompress_error);
+}