Specifications

• hal.linker.allow_code_at_reset
• hal.linker.enable_alt_load_copy_rodata
• hal.linker.enable_alt_load_copy_rwdata
• hal.linker.enable_alt_load_copy_exceptions
For more information about these settings, refer to the Nios II Software Build Tools Reference chapter of
the Nios II Software Developer’s Handbook.
Related Information
Nios II Software Build Tools Reference on page 15-1
Boot Loader Dependent Settings
The script examines the .text section mapping and the Nios II reset slave port. If the .text section is
mapped to the same memory as the Nios II reset slave port and the reset slave port is a flash memory
device, the script assumes that a boot loader is being used. You can override this behavior by passing the
enable_bootloader option to the default Tcl script.
If a boot loader is enabled, the assumption is that the boot loader is located at the reset address and
handles the copying of sections on reset. If there is no boot loader, the BSP might need to provide code to
handle these functions. You can use the alt_load() function to implement a boot loader.
Table 4-10: Boot Loader-Dependent Settings
Setting name
(5)
Value When
Boot Loader
Enabled
Value When Boot Loader
Disabled
hal.linker.allow_code_at_reset 0
hal.linker.enable_alt_load_copy_rodata 0 if .rodata memory different
than .text memory
and .rodata memory is
volatile; 0 otherwise
hal.linker.enable_alt_load_copy_rwdata 0 if .rwdata memory different
than .text memory; 0
otherwise
hal.linker.enable_alt_load_copy_exceptions 0 if .exceptions memory
different than .text memory
and .exceptions memory is
volatile; 0 otherwise
Related Information
Nios II Software Build Tools Reference on page 15-1
Using Individual Default Tcl Procedures
The default Tcl script consists of the top-level bsp-call-proc.tcl script plus the helper scripts listed in the
"Default Tcl Script Components" table (Table 4-8). The procedure call Tcl script allows you to call a
(5)
For more information about the settings in this table, refer to the Nios II Software Build Tools Reference
chapter of the Nios II Software Developer’s Handbook.
4-38
Boot Loader Dependent Settings
NII5V2
2015.05.14
Altera Corporation
Nios II Software Build Tools
Send Feedback