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Date: Thu, 9 Dec 2010 17:38:26 +0800
From: "Guan Xuetao" <guanxuetao@...c.pku.edu.cn>
To: "Arnd Bergmann" <arnd@...db.de>
Cc: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCHv1 008/211] unicore32: new file arch/unicore32/boot/compressed/misc.c
From: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
decompress_kernel call wrapper in c function
Signed-off-by: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
---
arch/unicore32/boot/compressed/misc.c | 143
+++++++++++++++++++++++++++++++++
1 files changed, 143 insertions(+), 0 deletions(-)
diff --git a/arch/unicore32/boot/compressed/misc.c
b/arch/unicore32/boot/compressed/misc.c
new file mode 100644
index 0000000..28dda37
--- /dev/null
+++ b/arch/unicore32/boot/compressed/misc.c
@@ -0,0 +1,143 @@
+/*
+ * linux/arch/unicore32/boot/compressed/misc.c
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/unaligned.h>
+#include <asm/mach/uncompress.h>
+
+/*
+ * gzip delarations
+ */
+unsigned char *output_data;
+unsigned long output_ptr;
+
+unsigned int free_mem_ptr;
+unsigned int free_mem_end_ptr;
+
+#define STATIC static
+#define STATIC_RW_DATA /* non-static please */
+
+/*
+ * arch-dependent implementations
+ */
+#ifndef ARCH_HAVE_DECOMP_ERROR
+#define arch_decomp_error(x)
+#endif
+
+#ifndef ARCH_HAVE_DECOMP_SETUP
+#define arch_decomp_setup()
+#endif
+
+#ifndef ARCH_HAVE_DECOMP_PUTS
+#define arch_decomp_puts(p)
+#endif
+
+/* Diagnostic functions */
+#ifdef DEBUG
+# define Assert(cond, msg) { if (!(cond)) error(msg); }
+# define Trace(x) fprintf x
+# define Tracev(x) { if (verbose) fprintf x; }
+# define Tracevv(x) { if (verbose > 1) fprintf x; }
+# define Tracec(c, x) { if (verbose && (c)) fprintf x; }
+# define Tracecv(c, x) { if ((verbose > 1) && (c))
fprintf x; }
+#else
+# define Assert(cond, msg)
+# define Trace(x)
+# define Tracev(x)
+# define Tracevv(x)
+# define Tracec(c, x)
+# define Tracecv(c, x)
+#endif
+
+void *memcpy(void *__dest, __const void *__src, size_t __n)
+{
+ int i = 0;
+ unsigned char *d = (unsigned char *)__dest, *s = (unsigned char
*)__src;
+
+ for (i = __n >> 3; i > 0; i--) {
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ }
+
+ if (__n & 1 << 2) {
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ *d++ = *s++;
+ }
+
+ if (__n & 1 << 1) {
+ *d++ = *s++;
+ *d++ = *s++;
+ }
+
+ if (__n & 1)
+ *d++ = *s++;
+
+ return __dest;
+}
+
+void error(char *x)
+{
+
+ arch_decomp_puts("\n\n");
+ arch_decomp_puts(x);
+ arch_decomp_puts("\n\n -- System halted");
+
+ arch_decomp_error(x);
+
+ do { } while (1); /* Halt */
+}
+
+/* Heap size should be adjusted for different decompress method */
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_BZIP2
+#include "../../../../lib/decompress_bunzip2.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZMA
+#include "../../../../lib/decompress_unlzma.c"
+#endif
+
+unsigned long
+decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
+ unsigned long free_mem_ptr_end_p)
+{
+ unsigned char *tmp;
+
+ output_data = (unsigned char *)output_start;
+ free_mem_ptr = free_mem_ptr_p;
+ free_mem_end_ptr = free_mem_ptr_end_p;
+
+ arch_decomp_setup();
+
+ tmp = (unsigned char *) (((unsigned long)input_data_end) - 4);
+ output_ptr = get_unaligned_le32(tmp);
+
+ arch_decomp_puts("Uncompressing Linux...");
+ decompress(input_data, input_data_end - input_data, NULL, NULL,
+ output_data, NULL, error);
+ arch_decomp_puts(" done, booting the kernel.\n");
+ return output_ptr;
+}
--
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