nds32: Enable the function of passing parameters to Linux

Add a header file, setup.h, which copy from Linux source code,
this file contain structures are used to pass initialisation parameters
to Linux. Enable this function on adp-ag101/adp-ag101p target

Signed-off-by: Kuan-Yu Kuo <ken.kuoky@gmail.com>
Cc: Macpaul Lin <macpaul@gmail.com>

arch/nds32/include/asm/setup.h

@@ -0,0 +1,192 @@
+/*
+ *  linux/arch/nds32/include/asm/setup.h
+ *
+ *  Copyright (C) 1997-1999 Russell King
+ *  Copyright (C) 2008 Andes Technology Corporation
+ *	Copyright (C) 2013 Ken Kuo (ken_kuo@andestech.com)
+ *
+ * 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.
+ *
+ *  Structure passed to kernel to tell it about the
+ *  hardware it's running on.  See Documentation/arm/Setup
+ *  for more info.
+ */
+#ifndef __ASMNDS32_SETUP_H
+#define __ASMNDS32_SETUP_H
+
+#define COMMAND_LINE_SIZE 256
+
+/* The list ends with an ATAG_NONE node. */
+#define ATAG_NONE	0x00000000
+
+struct tag_header {
+	u32 size;
+	u32 tag;
+};
+
+/* The list must start with an ATAG_CORE node */
+#define ATAG_CORE	0x54410001
+
+struct tag_core {
+	u32 flags;		/* bit 0 = read-only */
+	u32 pagesize;
+	u32 rootdev;
+};
+
+/* it is allowed to have multiple ATAG_MEM nodes */
+#define ATAG_MEM	0x54410002
+
+struct tag_mem32 {
+	u32	size;
+	u32	start;	/* physical start address */
+};
+
+/* VGA text type displays */
+#define ATAG_VIDEOTEXT	0x54410003
+
+struct tag_videotext {
+	u8		x;
+	u8		y;
+	u16		video_page;
+	u8		video_mode;
+	u8		video_cols;
+	u16		video_ega_bx;
+	u8		video_lines;
+	u8		video_isvga;
+	u16		video_points;
+};
+
+/* describes how the ramdisk will be used in kernel */
+#define ATAG_RAMDISK	0x54410004
+
+struct tag_ramdisk {
+	u32 flags;	/* bit 0 = load, bit 1 = prompt */
+	u32 size;	/* decompressed ramdisk size in _kilo_ bytes */
+	u32 start;	/* starting block of floppy-based RAM disk image */
+};
+
+/*
+ * this one accidentally used virtual addresses - as such,
+ * it's deprecated.
+ * describes where the compressed ramdisk image lives (virtual address)
+ */
+#define ATAG_INITRD		0x54410005
+
+/* describes where the compressed ramdisk image lives (physical address) */
+#define ATAG_INITRD2	0x54420005
+
+struct tag_initrd {
+	u32 start;	/* physical start address */
+	u32 size;	/* size of compressed ramdisk image in bytes */
+};
+
+/* board serial number. "64 bits should be enough for everybody" */
+#define ATAG_SERIAL		0x54410006
+
+struct tag_serialnr {
+	u32 low;
+	u32 high;
+};
+
+/* board revision */
+#define ATAG_REVISION	0x54410007
+
+struct tag_revision {
+	u32 rev;
+};
+
+/* initial values for vesafb-type framebuffers. see struct screen_info
+ * in include/linux/tty.h
+ */
+#define ATAG_VIDEOLFB	0x54410008
+
+struct tag_videolfb {
+	u16		lfb_width;
+	u16		lfb_height;
+	u16		lfb_depth;
+	u16		lfb_linelength;
+	u32		lfb_base;
+	u32		lfb_size;
+	u8		red_size;
+	u8		red_pos;
+	u8		green_size;
+	u8		green_pos;
+	u8		blue_size;
+	u8		blue_pos;
+	u8		rsvd_size;
+	u8		rsvd_pos;
+};
+
+/* command line: \0 terminated string */
+#define ATAG_CMDLINE	0x54410009
+
+struct tag_cmdline {
+	char	cmdline[COMMAND_LINE_SIZE];
+};
+
+struct tag {
+	struct tag_header hdr;
+	union {
+		struct tag_core		core;
+		struct tag_mem32	mem;
+		struct tag_videotext	videotext;
+		struct tag_ramdisk	ramdisk;
+		struct tag_initrd	initrd;
+		struct tag_serialnr	serialnr;
+		struct tag_revision	revision;
+		struct tag_videolfb	videolfb;
+		struct tag_cmdline	cmdline;
+	} u;
+};
+
+struct tagtable {
+	u32 tag;
+	int (*parse)(const struct tag *);
+};
+
+#define tag_member_present(tag, member)				\
+	((unsigned long)(&((struct tag *)0L)->member + 1)	\
+		<= (tag)->hdr.size * 4)
+
+#define tag_next(t)	((struct tag *)((u32 *)(t) + (t)->hdr.size))
+#define tag_size(type)	((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
+
+#define for_each_tag(t, base) \
+	for (t = base; t->hdr.size; t = tag_next(t))
+
+#ifdef __KERNEL__
+
+#define __tag __used __attribute__((__section__(".taglist")))
+#define __tagtable(tag, fn) \
+static struct tagtable __tagtable_##fn __tag = { tag, fn }
+
+/*
+ * Memory map description
+ */
+#define NR_BANKS 8
+
+struct meminfo {
+	int nr_banks;
+	struct {
+		unsigned long start;
+		unsigned long size;
+		int           node;
+	} bank[NR_BANKS];
+};
+
+/*
+ * Early command line parameters.
+ */
+struct early_params {
+	const char *arg;
+	void (*fn)(char **p);
+};
+
+#define __early_param(name, fn)					\
+static struct early_params __early_##fn __used	\
+__attribute__((__section__("__early_param"))) = { name, fn }
+
+#endif
+#endif

include/common.h

@@ -421,6 +421,7 @@ static inline int setenv_addr(const char *varname, const void *addr)
 #endif
 #ifdef CONFIG_NDS32
 # include <asm/mach-types.h>
+# include <asm/setup.h>
 # include <asm/u-boot-nds32.h>
 #endif /* CONFIG_NDS32 */
 #ifdef CONFIG_MIPS

include/configs/adp-ag101.h

@@ -35,6 +35,13 @@
 
 #define CONFIG_SKIP_LOWLEVEL_INIT
 
+/*
+ * Definitions related to passing arguments to kernel.
+ */
+#define CONFIG_CMDLINE_TAG			/* send commandline to Kernel */
+#define CONFIG_SETUP_MEMORY_TAGS	/* send memory definition to kernel */
+#define CONFIG_INITRD_TAG			/* send initrd params */
+
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 #define CONFIG_MEM_REMAP
 #endif

include/configs/adp-ag101p.h

@@ -35,6 +35,13 @@
 
 #define CONFIG_SKIP_LOWLEVEL_INIT
 
+/*
+ * Definitions related to passing arguments to kernel.
+ */
+#define CONFIG_CMDLINE_TAG			/* send commandline to Kernel */
+#define CONFIG_SETUP_MEMORY_TAGS	/* send memory definition to kernel */
+#define CONFIG_INITRD_TAG			/* send initrd params */
+
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
 #define CONFIG_MEM_REMAP
 #endif