IoReadMmReg8(), IoReadMmReg16(), IoReadMmReg32()

These functions are declared in the coresrv/io/mmio.h file.

rtl_uint8_t IoReadMmReg8(volatile void *reg);

rtl_uint16_t IoReadMmReg16(volatile void *reg);

rtl_uint32_t IoReadMmReg32(volatile void *reg);

These functions read one, two, or four bytes, respectively, from the register mapped to the reg address and return the read value.