1 files changed, 60 insertions, 0 deletions
diff --git a/arch/powerpc/boot/xz_config.h b/arch/powerpc/boot/xz_config.h
new file mode 100644
index 000000000..ebfadd39e
--- /dev/null
+++ b/arch/powerpc/boot/xz_config.h
@@ -0,0 +1,60 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __XZ_CONFIG_H__
+#define __XZ_CONFIG_H__
+
+/*
+ * most of this is copied from lib/xz/xz_private.h, we can't use their defines
+ * since the boot wrapper is not built in the same environment as the rest of
+ * the kernel.
+ */
+
+#include "types.h"
+#include "swab.h"
+
+static inline uint32_t swab32p(void *p)
+{
+	uint32_t *q = p;
+
+	return swab32(*q);
+}
+
+#ifdef __LITTLE_ENDIAN__
+#define get_le32(p) (*((uint32_t *) (p)))
+#define cpu_to_be32(x) swab32(x)
+static inline u32 be32_to_cpup(const u32 *p)
+{
+	return swab32p((u32 *)p);
+}
+#else
+#define get_le32(p) swab32p(p)
+#define cpu_to_be32(x) (x)
+static inline u32 be32_to_cpup(const u32 *p)
+{
+	return *p;
+}
+#endif
+
+static inline uint32_t get_unaligned_be32(const void *p)
+{
+	return be32_to_cpup(p);
+}
+
+static inline void put_unaligned_be32(u32 val, void *p)
+{
+	*((u32 *)p) = cpu_to_be32(val);
+}
+
+#define memeq(a, b, size) (memcmp(a, b, size) == 0)
+#define memzero(buf, size) memset(buf, 0, size)
+
+/* prevent the inclusion of the xz-preboot MM headers */
+#define DECOMPR_MM_H
+#define memmove memmove
+#define XZ_EXTERN static
+
+/* xz.h needs to be included directly since we need enum xz_mode */
+#include "../../../include/linux/xz.h"
+
+#undef XZ_EXTERN
+
+#endif