3.5.1.21.3 Scalar Argument Driver Functions

When a scalar argument is configured to use AXI4 target interface (see Scalar Argument), SmartHLS™ generates the following driver functions for the CPU to write and read the argument into and from the SmartHLS module, respectively.
Table 3-9. Scalar Argument Driver Functions
Operating SystemFunction SignatureDescription
Linuxvoid <TopFunc>_write_<ArgName>(TYPE val, void *virt_addr);This function writes the value 'val' to the scalar argument <ArgName>. This essentially causes an AXI Memory Map write transaction into the SmartHLS module's on-chip storage.
Baremetalvoid <TopFunc>_write_<ArgName>(TYPE val, uint32_t base_addr = <TopFunc>_BASE_ADDR);
LinuxRETYPE <TopFunc>_read_<ArgName>(void *virt_addr);This function reads the value of the <ArgName>. This is causes an AXI Memory Map read transaction from the SmartHLS module's on-chip storage.
BaremetalRETYPE <TopFunc>_read_<ArgName>(uint32_t base_addr = MYTOPFUNC_BASE_ADDR);