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use strict;
package Hostboot::CallFunc;
use Exporter;
our @EXPORT_OK = ('main');
use constant CALLFUNC_DEBUG_READY_OFFSET => 0;
use constant CALLFUNC_DEBUG_RUNNING_OFFSET => CALLFUNC_DEBUG_READY_OFFSET + 1;
use constant CALLFUNC_DEBUG_COMPLETE_OFFSET => CALLFUNC_DEBUG_READY_OFFSET + 2;
use constant CALLFUNC_DEBUG_ENTRY_OFFSET => CALLFUNC_DEBUG_READY_OFFSET + 8;
use constant CALLFUNC_DEBUG_RETVAL_OFFSET => CALLFUNC_DEBUG_ENTRY_OFFSET + 8;
use constant CALLFUNC_DEBUG_PARMS_OFFSET => CALLFUNC_DEBUG_RETVAL_OFFSET + 8;
use constant CALLFUNC_DEBUG_PARMS => 8;
sub main
{
my ($packName,$args) = @_;
# Parse 'debug' option.
my $debug = 0;
if (defined $args->{"debug"})
{
$debug = 1;
}
# Parse function name from options.
my $function = "";
if (defined $args->{"function"})
{
$function = $args->{"function"};
}
elsif (defined $args->{"func"})
{
$function = $args->{"func"};
}
else
{
::userDisplay "Must give a function to execute.\n";
return;
}
# Parse function arguments from options.
my @parms = ();
my $parms_string = "";
if (defined $args->{"arguments"})
{
$parms_string = $args->{"arguments"}
}
elsif (defined $args->{"args"})
{
$parms_string = $args->{"args"};
}
elsif (defined $args->{"parameters"})
{
$parms_string = $args->{"parameters"};
}
elsif (defined $args->{"parms"})
{
$parms_string = $args->{"parms"};
}
@parms = map eval, split /,/, $parms_string;
# Parse 'force' argument.
my $force = 0;
if (defined $args->{"force"})
{
$force = 1;
}
# Ensure environment is in the proper state for running instructions.
if (!::readyForInstructions())
{
::userDisplay "Cannot execute while unable to run instructions.\n";
return;
}
# Find symbol's TOC address.
my $toc = ::findSymbolTOCAddress($function);
if ($debug)
{
::userDisplay("Symbol $function TOC at $toc.\n");
}
# Find interactive debug structure in the kernel.
my $address = (::findSymbolAddress("CpuManager::cv_interactive_debug"))[0];
if ((not defined $toc) || (not defined $address))
{
::userDisplay "Cannot find symbol to execute $function.\n";
return;
}
# Verify kernel isn't busy with an outstanding request.
if ((0 != ::read16 ($address + CALLFUNC_DEBUG_READY_OFFSET)) &&
(0 == $force))
{
::userDisplay "Another command is still pending.\n";
return;
}
# Write entry point (function TOC) and parameters into debug structure.
::write64(($address + CALLFUNC_DEBUG_ENTRY_OFFSET), $toc);
while(($#parms + 1) != CALLFUNC_DEBUG_PARMS)
{
push @parms, 0x0;
}
my $i = 0;
while ($i != CALLFUNC_DEBUG_PARMS)
{
if ($debug)
{
::userDisplay "Param $i = ".$parms[$i]."\n";
}
::write64(($address + CALLFUNC_DEBUG_PARMS_OFFSET + 8*$i), $parms[$i]);
$i = $i + 1;
}
# Set ready state.
::write32(($address + CALLFUNC_DEBUG_READY_OFFSET), 0x01000000);
# Clock forward until kernel marks 'complete' state.
my $i = 0;
while((0 != ::read16($address + CALLFUNC_DEBUG_READY_OFFSET)) &&
(0 == ::read8($address + CALLFUNC_DEBUG_COMPLETE_OFFSET)) &&
($i < 50))
{
::executeInstrCycles(100000);
$i = $i + 1;
if ($debug)
{
::userDisplay("Loop $i.\n");
}
}
# Verify successful execution ('complete' state set).
if (0 == ::read8($address + CALLFUNC_DEBUG_COMPLETE_OFFSET))
{
::userDisplay "Command failed to complete.\n";
return;
}
# Display return value.
::userDisplay ::read64($address + CALLFUNC_DEBUG_RETVAL_OFFSET)."\n";
}
sub help
{
::userDisplay "Tool: CallFunc\n";
::userDisplay "\tInteractively execute a function.\n";
::userDisplay "\n Options:\n";
::userDisplay "\tfunction='function name' - Function to execute.\n";
::userDisplay "\targuments=arg0,arg1... - List of arguments to pass.\n";
::userDisplay "\tforce - Run command even if state doesn't not appear ".
"correct.\n";
::userDisplay "\n\tfunc can be used as a short-name for 'function'.\n";
::userDisplay "\targs, parameters, or parms can be used as a short-name ";
::userDisplay "for arguments.\n";
}
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