Is there a way to use external matlab struct variables and object variables in simulink matlab function block ?

Dear all,

I am trying to implement a simulink matlab function, that has to use only those input arguments required for the function. However, I have few extra struct and object type parameters that are to be used for complete execution of my function.

for e.g. I have a svmpredict function to be called within this matlab function which use a structure variable as one of the argument. I also have neural network net function or sim function to be used within this simulink function block, which also uses a class object variable.

at the end of this question i have posted my code snippet for reference what is not clear to me is, how can i make these workspace objects available within my simulink function block without explicitly passing as argument ? I really hope there is a way to make this happen, i kindly require your assistance in this regard.

Any help is appreciated and Thanks.

function y = fcn(SOC,Qd,Tamb,Batt_Cap,switch_in)
%#codegen
coder.extrinsic('svmpredict','net','polyvaln')
Cd = Qd*Batt_Cap;%Batt_Cap in Ah
soc_test = SOC;
current = Cd*ones(1,length(soc_test));
temp = Tamb*ones(1,length(soc_test));
dv = 0.0005*ones(1,length(soc_test));
soc_testn = mapminmax('apply',soc_test,pssoc);
tempn = mapminmax('apply',temp,pstemp);
currentn = mapminmax('apply',current,pscur);

xtestn = [soc_testn',currentn',tempn',dv'];
xtest = [soc_test',current',temp'];
y = 1*ones(length(soc_test),1);

switch switch_in
    case 1
        %'model' is the output structure of svmtrain and svmpredict is
        %external function
        [estimate_out, Acc, projection] = svmpredict(y,xtestn, model); 
    case 2
        %function net uses an object named 'net' which is ouput of the 
        %neural net training 
        [estimate_out] = net(xtest'); 
    case 3
        %function polyvaln uses an external struct parameter 'poly_mdl'
        % as input
        [estimate_out] = polyvaln(poly_mdl,xtest);
    case 4
        disp('positive number');
    otherwise
        disp('Please use numbers between 1, 2, or 3 for selection');
        error('myApp:argChk', 'Wrong choice selection for static model selection')
end