path: root/scripts/dtc/flattree.c

/*
 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *                                                                   USA
 */

#include "dtc.h"
#include "srcpos.h"

#define FTF_FULLPATH	0x1
#define FTF_VARALIGN	0x2
#define FTF_NAMEPROPS	0x4
#define FTF_BOOTCPUID	0x8
#define FTF_STRTABSIZE	0x10
#define FTF_STRUCTSIZE	0x20
#define FTF_NOPS	0x40

static struct version_info {
	int version;
	int last_comp_version;
	int hdr_size;
	int flags;
} version_table[] = {
	{1, 1, FDT_V1_SIZE,
	 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS},
	{2, 1, FDT_V2_SIZE,
	 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID},
	{3, 1, FDT_V3_SIZE,
	 FTF_FULLPATH|FTF_VARALIGN|FTF_NAMEPROPS|FTF_BOOTCPUID|FTF_STRTABSIZE},
	{16, 16, FDT_V3_SIZE,
	 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_NOPS},
	{17, 16, FDT_V17_SIZE,
	 FTF_BOOTCPUID|FTF_STRTABSIZE|FTF_STRUCTSIZE|FTF_NOPS},
};

struct emitter {
	void (*cell)(void *, cell_t);
	void (*string)(void *, char *, int);
	void (*align)(void *, int);
	void (*data)(void *, struct data);
	void (*beginnode)(void *, struct label *labels);
	void (*endnode)(void *, struct label *labels);
	void (*property)(void *, struct label *labels);
};

static void bin_emit_cell(void *e, cell_t val)
{
	struct data *dtbuf = e;

	*dtbuf = data_append_cell(*dtbuf, val);
}

static void bin_emit_string(void *e, char *str, int len)
{
	struct data *dtbuf = e;

	if (len == 0)
		len = strlen(str);

	*dtbuf = data_append_data(*dtbuf, str, len);
	*dtbuf = data_append_byte(*dtbuf, '\0');
}

static void bin_emit_align(void *e, int a)
{
	struct data *dtbuf = e;

	*dtbuf = data_append_align(*dtbuf, a);
}

static void bin_emit_data(void *e, struct data d)
{
	struct data *dtbuf = e;

	*dtbuf = data_append_data(*dtbuf, d.val, d.len);
}

static void bin_emit_beginnode(void *e, struct label *labels)
{
	bin_emit_cell(e, FDT_BEGIN_NODE);
}

static void bin_emit_endnode(void *e, struct label *labels)
{
	bin_emit_cell(e, FDT_END_NODE);
}

static void bin_emit_property(void *e, struct label *labels)
{
	bin_emit_cell(e, FDT_PROP);
}

static struct emitter bin_emitter = {
	.cell = bin_emit_cell,
	.string = bin_emit_string,
	.align = bin_emit_align,
	.data = bin_emit_data,
	.beginnode = bin_emit_beginnode,
	.endnode = bin_emit_endnode,
	.property = bin_emit_property,
};

static void emit_label(FILE *f, const char *prefix, const char *label)
{
	fprintf(f, "\t.globl\t%s_%s\n", prefix, label);
	fprintf(f, "%s_%s:\n", prefix, label);
	fprintf(f, "_%s_%s:\n", prefix, label);
}

static void emit_offset_label(FILE *f, const char *label, int offset)
{
	fprintf(f, "\t.globl\t%s\n", label);
	fprintf(f, "%s\t= . + %d\n", label, offset);
}

#define ASM_EMIT_BELONG(f, fmt, ...) \
	{ \
		fprintf((f), "\t.byte\t((" fmt ") >> 24) & 0xff\n", __VA_ARGS__); \
		fprintf((f), "\t.byte\t((" fmt ") >> 16) & 0xff\n", __VA_ARGS__); \
		fprintf((f), "\t.byte\t((" fmt ") >> 8) & 0xff\n", __VA_ARGS__); \
		fprintf((f), "\t.byte\t(" fmt ") & 0xff\n", __VA_ARGS__); \
	}

static void asm_emit_cell(void *e, cell_t val)
{
	FILE *f = e;

	fprintf(f, "\t.byte 0x%02x; .byte 0x%02x; .byte 0x%02x; .byte 0x%02x\n",
		(val >> 24) & 0xff, (val >> 16) & 0xff,
		(val >> 8) & 0xff, val & 0xff);
}

static void asm_emit_string(void *e, char *str, <