#!/usr/bin/perl
#
# Generate the smd_rpc_sym.c symbol file for ONCRPC SMEM Logging
#
# Copyright (c) 2009, The Linux Foundation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following
#       disclaimer in the documentation and/or other materials provided
#       with the distribution.
#     * Neither the name of The Linux Foundation nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

use strict;
use POSIX;

my $base_fn = "smd_rpc_sym";
my %prog_table;
my ($in, $out) = @ARGV;
my $max_table_size = 1024;

my $header = <<"EOF";
/* Autogenerated by mkrpcsym.pl.  Do not edit */
EOF

sub smd_rpc_gen_files() {
	my $c_fp;
	my $h_fp;
	my @table;
	my $tbl_index;
	my $num_undefined=0;

	# Process the input hash table into an array
	# Any duplicate items will be combined, missing items will
	# become "UNKNOWN"  We end-up with a fully-qualified table
	# from 0 to n.

	$prog_table{"UNDEFINED"}{'name'}="UNDEFINED";
	$prog_table{"UNDEFINED"}{'prog'}=-1;
	my $hex_num = 0xFFFF;
	foreach my $api_prog (sort {$a cmp $b} keys %prog_table ) {
		$tbl_index = hex($api_prog) & hex("0000FFFF");
		if($prog_table{$api_prog}{'prog'} >= 0) {
			if($tbl_index < $max_table_size) {
				$table[$tbl_index]=$prog_table{$api_prog};
			} else {
				print "Skipping table item $tbl_index, larger ",
					"than max:$max_table_size \n";
			}
		}
	}
	for (my $i=0; $i<=$#table; $i++) {
		if (!exists $table[$i]) {
			$table[$i]=$prog_table{"UNDEFINED"};
		$num_undefined++;
		}
	}


	open($c_fp, ">", $out) or die  $!;
	print $c_fp $header;
	print $c_fp "\n\n\n";
	print $c_fp <<"EOF";
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/module.h>

struct sym {
	const char *str;
};

EOF

# Each API is named starts with "CB " to allow both the forward and
# callback names of the API to be returned from a common database.
# By convention, program names starting with 0x30 are forward APIS,
# API names starting with 0x31 are callback apis.
	print $c_fp "const char *smd_rpc_syms[] = {\n";

	for (my $i=0; $i<= $#table; $i++) {
		my $l = length($table[$i]{'name'});
		my $t = floor((45 - $l - 4)/8);
		print $c_fp "\t\"CB ".uc($table[$i]{'name'})."\",";
		if($table[$i]{'name'} ne "UNDEFINED") {
			for (my $i=0;$i<$t;$i++) {
				print $c_fp "\t";
			}
			print $c_fp "/*".$table[$i]{'prog'}."*/\n";
		} else {
			print $c_fp "\n";
		}
	}

	print $c_fp "};\n";
	print $c_fp <<"EOF";

static struct sym_tbl {
	const char **data;
	int size;
} tbl = { smd_rpc_syms, ARRAY_SIZE(smd_rpc_syms)};

const char *smd_rpc_get_sym(uint32_t val)
{
	int idx = val & 0xFFFF;
	if (idx < tbl.size) {
		if (val & 0x01000000)
			return tbl.data[idx];
		else
			return tbl.data[idx] + 3;
	}
	return 0;
}
EXPORT_SYMBOL(smd_rpc_get_sym);

EOF
	close $c_fp;
}

sub read_smd_rpc_table() {
	my $fp;
	my $line;
	open($fp, "<", $in) or die  "$! File:$in";
	while ($line = <$fp>) {
		chomp($line);
		if($line =~ /([^\s]+)\s+([\w]+)$/) {
			if(defined $prog_table{$1}) {
				print "Error entry already defined $1,",
				      " in $prog_table{$1}{name} \n";
			} else {
				$prog_table{$1}{'name'}=$2;
				$prog_table{$1}{'prog'}=$1;
			}
		} else {
			if($line =~ /\w/) {
				print "Error parsing error >>$line<< \n";
			}
		}
	}
	close $fp;
}

read_smd_rpc_table();
smd_rpc_gen_files();