1 files changed, 74 insertions, 0 deletions
diff --git a/arch/riscv/boot/uncompress.c b/arch/riscv/boot/uncompress.c
new file mode 100644
index 0000000000..cf268bece1
--- /dev/null
+++ b/arch/riscv/boot/uncompress.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: 2010-2013 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+// SPDX-FileCopyrightText: 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+
+/* uncompress.c - uncompressor code for self extracing pbl image */
+
+#define pr_fmt(fmt) "uncompress.c: " fmt
+
+#include <common.h>
+#include <init.h>
+#include <linux/sizes.h>
+#include <pbl.h>
+#include <asm/barebox-riscv.h>
+#include <asm-generic/memory_layout.h>
+#include <asm/sections.h>
+#include <asm/unaligned.h>
+
+#include <debug_ll.h>
+
+#include "entry.h"
+
+unsigned long free_mem_ptr;
+unsigned long free_mem_end_ptr;
+
+extern unsigned char input_data[];
+extern unsigned char input_data_end[];
+
+void __noreturn barebox_pbl_start(unsigned long membase, unsigned long memsize,
+				  void *fdt)
+{
+	uint32_t pg_len, uncompressed_len;
+	void __noreturn (*barebox)(unsigned long, unsigned long, void *);
+	unsigned long endmem = membase + memsize;
+	unsigned long barebox_base;
+	void *pg_start, *pg_end;
+	unsigned long pc = get_pc();
+
+	pg_start = input_data + get_runtime_offset();
+	pg_end = input_data_end + get_runtime_offset();
+
+	/*
+	 * If we run from inside the memory just relocate the binary
+	 * to the current address. Otherwise it may be a readonly location.
+	 * Copy and relocate to the start of the memory in this case.
+	 */
+	if (pc > membase && pc - membase < memsize)
+		relocate_to_current_adr();
+	else
+		relocate_to_adr(membase);
+
+	pg_len = pg_end - pg_start;
+	uncompressed_len = get_unaligned((const u32 *)(pg_start + pg_len - 4));
+
+	barebox_base = riscv_mem_barebox_image(membase, endmem,
+					       uncompressed_len + MAX_BSS_SIZE);
+
+	setup_c();
+
+	pr_debug("memory at 0x%08lx, size 0x%08lx\n", membase, memsize);
+
+	free_mem_ptr = riscv_mem_early_malloc(membase, endmem);
+	free_mem_end_ptr = riscv_mem_early_malloc_end(membase, endmem);
+
+	pr_debug("uncompressing barebox binary at 0x%p (size 0x%08x) to 0x%08lx (uncompressed size: 0x%08x)\n",
+			pg_start, pg_len, barebox_base, uncompressed_len);
+
+	pbl_barebox_uncompress((void*)barebox_base, pg_start, pg_len);
+
+	barebox = (void *)barebox_base;
+
+	pr_debug("jumping to uncompressed image at 0x%p. dtb=0x%p\n", barebox, fdt);
+
+	barebox(membase, memsize, fdt);
+}