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#!/usr/bin/perl
# IBM_PROLOG_BEGIN_TAG
# This is an automatically generated prolog.
#
# $Source: src/build/debug/Hostboot/Dump.pm $
#
# IBM CONFIDENTIAL
#
# COPYRIGHT International Business Machines Corp. 2011,2013
#
# p1
#
# Object Code Only (OCO) source materials
# Licensed Internal Code Source Materials
# IBM HostBoot Licensed Internal Code
#
# The source code for this program is not published or otherwise
# divested of its trade secrets, irrespective of what has been
# deposited with the U.S. Copyright Office.
#
# Origin: 30
#
# IBM_PROLOG_END_TAG
use strict;
package Hostboot::Dump;
use Exporter;
our @EXPORT_OK = ('main');
use Fcntl qw(SEEK_SET);
use constant MEMSTATE_NO_MEM => 0x0;
use constant MEMSTATE_HALF_CACHE => 0x4;
use constant MEMSTATE_FULL_CACHE => 0x8;
use constant MEMSTATE_MS_32MEG => 0x20;
use constant MEMSTATE_PRE_SECURE_BOOT => 0xff;
use constant _KB => 1024;
use constant _MB => 1024 * 1024;
# Map the available memory at each state.
our %memory_maps = (
MEMSTATE_NO_MEM() =>
# No memory has been initialized so we can only dump our static
# code load up to 512 - 4k. The 4k is a reserved space for the
# Secureboot Header.
[ 0, (512 - 4) * _KB
],
MEMSTATE_PRE_SECURE_BOOT() =>
# Until the early secureboot operations have been done, we can
# only access the top 512k of each 1MB column. Need to avoid
# the hole for the MBOX DMA buffers (64K @ 3MB + 256K).
[ (512 - 4) * _KB, 4 * _KB,
1 * _MB, 512 * _KB,
2 * _MB, 512 * _KB,
3 * _MB, 256 * _KB,
3 * _MB + (256 + 64) * _KB, (256 - 64) * _KB
],
MEMSTATE_HALF_CACHE() =>
# All of the first 4MB can now be read (except reserved MBOX).
[ 512 * _KB, 512 * _KB,
1 * _MB + 512 * _KB, 512 * _KB,
2 * _MB + 512 * _KB, 512 * _KB,
3 * _MB + 512 * _KB, 512 * _KB
],
MEMSTATE_FULL_CACHE() =>
# Add next full 4MB after we expand to the full cache.
[ 4 * _MB, 1 * _MB,
5 * _MB, 1 * _MB,
6 * _MB, 1 * _MB,
7 * _MB, 1 * _MB
],
MEMSTATE_MS_32MEG() =>
# Add next 24MB after we expand to memory.
[ 8 * _MB, 24 * _MB
]
);
# Map the current state to the combined states available.
our %memory_states = (
MEMSTATE_NO_MEM() => [ MEMSTATE_NO_MEM ],
MEMSTATE_PRE_SECURE_BOOT() => [ MEMSTATE_NO_MEM, MEMSTATE_PRE_SECURE_BOOT ],
MEMSTATE_HALF_CACHE() => [ MEMSTATE_NO_MEM, MEMSTATE_PRE_SECURE_BOOT,
MEMSTATE_HALF_CACHE ],
MEMSTATE_FULL_CACHE() => [ MEMSTATE_NO_MEM, MEMSTATE_PRE_SECURE_BOOT,
MEMSTATE_HALF_CACHE, MEMSTATE_FULL_CACHE ],
MEMSTATE_MS_32MEG() => [ MEMSTATE_NO_MEM, MEMSTATE_PRE_SECURE_BOOT,
MEMSTATE_HALF_CACHE, MEMSTATE_FULL_CACHE,
MEMSTATE_MS_32MEG ]
);
sub main
{
my ($packName,$args) = @_;
# Parse 'debug' option.
my $debug = 0;
if (defined $args->{"debug"})
{
$debug = 1;
}
# Read the current memory state.
my $memstate_addr = ::read64(0x2000 + 0x8); # Read descriptor address.
$memstate_addr += 0x10; # Memory state is 3rd entry into descriptor.
my $memstate = ::read32($memstate_addr + 4); # only need bottom 32 bits
::userDisplay (sprintf "Current state is %x\n", $memstate) if $debug;
#Get current timestamp and open a corresponding file.
my $timeStamp = `date +%Y%m%d%H%M`;
chomp $timeStamp;
my $hbDumpFile = "hbdump.$timeStamp";
::userDisplay "Dumping Hostboot to Open output file $hbDumpFile\n";
open( OUTFH, ">$hbDumpFile" ) or die "can't open $hbDumpFile: $!\n";
binmode(OUTFH);
# Read memory regions and output to file.
foreach my $state (@{$memory_states{int $memstate}})
{
my $regions = $memory_maps{int $state};
while (scalar(@{$regions}))
{
my $start = shift @{$regions};
my $length = shift @{$regions};
::userDisplay (sprintf "\t%x@%x\n", $length, $start) if $debug;
my $data = ::readData($start, $length);
seek OUTFH, $start, SEEK_SET;
print OUTFH $data;
}
}
# Close file.
close OUTFH;
#Check if hbDumpFile exists and is not empty
if (-s "$hbDumpFile" )
{
::userDisplay "\nHostBoot dump saved to $hbDumpFile.\n";
::userDisplay "Use the hb-dump-debug program to parse the dump.\n";
}
else
{
::userDisplay "\nWARNING: Cannot dump HB. Did you stop instructions?\n\n";
unlink $hbDumpFile;
}
}
sub helpInfo
{
my %info = (
name => "Dump",
intro => ["Dumps the entire Hostboot buffer to a file."],
);
}
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