Hi,
I have two separate RAM area for two level functions (L2 and L3).
The requirement is to give permission for L2 function to access only L2 RAM area, same for L3.
I wrote SMPU code in MPC5746R for setting permission for two RAM areas,by setting R/W access to L2 and L3 area as follows.
L2
-----------
//L2 RAM start address
SMPU_REG.RGD[0].WORD0 = SMPU_L2_RAM_STARTADDRESS;
//L2 RAM end address
SMPU_REG.RGD[0].WORD1 = SMPU_L2_RAM_ENDADDRESS;
/*Read write set for all masters */
SMPU_REG.RGD[0].WORD2 = SMPU_RW_ACCESS;
SMPU_REG.RGD[0].WORD3.REGFIELD = SMPU_RGD_VALID;
L3
-----------------
//L3 RAM start address
SMPU_REG.RGD[1].WORD0 = SMPU_L3_RAM_STARTADDRESS;
//L3 RAM end address
SMPU_REG.RGD[1].WORD1 = SMPU_L3_RAM_ENDADDRESS;
/*Read write set for all masters */
SMPU_REG.RGD[1].WORD2 = SMPU_RW_ACCESS;
SMPU_REG.RGD[1].WORD3.REGFIELD = SMPU_RGD_VALID;
I need to test whether L3 RAM area try to access L2 RAM area will cause violation and vice versa..?
Please give me a suggestion whether this method is correct..?
Thanks & Regards,
RR
