diff options
Diffstat (limited to 'picosoc/sections.lds')
-rw-r--r-- | picosoc/sections.lds | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/picosoc/sections.lds b/picosoc/sections.lds new file mode 100644 index 0000000..f38d813 --- /dev/null +++ b/picosoc/sections.lds @@ -0,0 +1,71 @@ +#ifdef ICEBREAKER +# define MEM_TOTAL 0x20000 /* 128 KB */ +#elif HX8KDEMO +# define MEM_TOTAL 0x200 /* 2 KB */ +#else +# error "Set -DICEBREAKER or -DHX8KDEMO when compiling firmware.c" +#endif + +MEMORY +{ + FLASH (rx) : ORIGIN = 0x00100000, LENGTH = 0x400000 /* entire flash, 4 MiB */ + RAM (xrw) : ORIGIN = 0x00000000, LENGTH = MEM_TOTAL +} + +SECTIONS { + /* The program code and other data goes into FLASH */ + .text : + { + . = ALIGN(4); + *(.text) /* .text sections (code) */ + *(.text*) /* .text* sections (code) */ + *(.rodata) /* .rodata sections (constants, strings, etc.) */ + *(.rodata*) /* .rodata* sections (constants, strings, etc.) */ + *(.srodata) /* .rodata sections (constants, strings, etc.) */ + *(.srodata*) /* .rodata* sections (constants, strings, etc.) */ + . = ALIGN(4); + _etext = .; /* define a global symbol at end of code */ + _sidata = _etext; /* This is used by the startup in order to initialize the .data secion */ + } >FLASH + + + /* This is the initialized data section + The program executes knowing that the data is in the RAM + but the loader puts the initial values in the FLASH (inidata). + It is one task of the startup to copy the initial values from FLASH to RAM. */ + .data : AT ( _sidata ) + { + . = ALIGN(4); + _sdata = .; /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */ + _ram_start = .; /* create a global symbol at ram start for garbage collector */ + . = ALIGN(4); + *(.data) /* .data sections */ + *(.data*) /* .data* sections */ + *(.sdata) /* .sdata sections */ + *(.sdata*) /* .sdata* sections */ + . = ALIGN(4); + _edata = .; /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */ + } >RAM + + /* Uninitialized data section */ + .bss : + { + . = ALIGN(4); + _sbss = .; /* define a global symbol at bss start; used by startup code */ + *(.bss) + *(.bss*) + *(.sbss) + *(.sbss*) + *(COMMON) + + . = ALIGN(4); + _ebss = .; /* define a global symbol at bss end; used by startup code */ + } >RAM + + /* this is to define the start of the heap, and make sure we have a minimum size */ + .heap : + { + . = ALIGN(4); + _heap_start = .; /* define a global symbol at heap start */ + } >RAM +} |