Ap_rst/ap_rst_n , not affect bram's reset signal

Question

Hi ,
    Is this a bug or not? I am using Vivado HLS 2014.2 .
When I change the reset polarity , it won't change the output signal of BRAM's reset.
for example
   when I set reset 's polority to negtive (ap_rst_n)  and pull the ap_rst_n high to let my function run , 
   the reset of BRAM's output singnal will be pulled high too . 
   For this problem , I can only set reset 's polarity to high (ap_rst) , but when I use port as AXI, vivado hls
force to set reset's polarity to low(ap_rst_n). . I can't use BRAM and AXI at the same time ! 
my code is here:
void sample_generator(ap_int<24> vp_in[1920] , ap_axis &vp_out){
#pragma HLS INTERFACE bram port=vp_in
#pragma HLS INTERFACE axis port=vp_out
         for(int x=0;x<1920;x++)
                vp_out = vp_in[x];
regards

Answer 1

I make a demo to demo this bug
the hls function
#include <stdio.h>
#include "ap_int.h"
void sample_generator(ap_int<24> vp_in[1920] ,ap_int<24> &vp_out){
#pragma HLS INTERFACE bram port=vp_in
#pragma HLS INTERFACE axis port=vp_out
        for(int x=0;x<1920;x++)
            vp_out=vp_in[x];
The design
the testbench code
module sample_generator_tb(
   reg ap_clk = 0;
    design_1 design_1_i
             (.ap_clk(ap_clk));
        always
          #1 ap_clk = ~ap_clk;
endmodule
the waveform of simulation result
we can notice that when I let ap_rst_n pull high, vp_in_V_Rst_A will be pulled high too. This will reset my bram.
Do anybody know how to fix this problem in hls? any directive ?