putting code functions from flash into RAM

I’m working with a F28335 and observe some abnormal issue during my debugging.

My setup as below: CCS version: 6.2.0.00050   Compiler Version: V15.12.3.LTS

I have many computations to perform in a short period of time, so I want put as much math functions and tables into RAM to execute as possible.

i used  HVPM_Sensorless_2833X. project as a startup.

i got #pragma CODE_SECTION(); into RAM, the  project runs normally

the map as below. 

name            origin    length      used     unused   attr    fill

RAML0                 00008000   00004000  00001d50  000022b0  RWIX

FLASHA                00338000   00007f80  00003b6a  00004416  RWIX

The issue is that, When I put more functions into ram, For example, ten functions,

Program would stuck in the AD initialization part, in DELAY function, as below

DELAY_US(ADC_usDELAY);

#define ADC_usDELAY 50000L

#define DELAY_US(A)  DSP28x_usDelay(((((long double)A*1000.0L)/(long double) CPU_CLOCK_SPEED)-9.0)/5.0L)

the map as below

name            origin    length      used     unused   attr    fill

RAML0                 00008000   00004000  00001d50  000022b0  RWIX

FLASHA                00338000   00007f80  00003b6a  00004416  RWIX

Any suggestion how to solve this problem, appreicated thanks.