[fpc-devel] How can I distribute code in two different memory areas? (.section)
Jeppe Græsdal Johansen
jeppe at j-software.dk
Sun Jun 2 22:51:12 CEST 2013
Den 02-06-2013 22:41, Michael Ring skrev:
> Hi, perhaps I am overseeing a simple solution for my problem:
> On the pic32 there are two flash areas, one at 0x9d000000 for the main
> program and another at 0xbfc00000 that is called Boot Flash. On reset
> the program starts in the boot flash at the first address.
> I have written the startup code for the chips now but I need to
> distribute some procedures between the two memory areas, for obvious
> reasons I must have some code at address 0xbfc00000 or the chip will
> not boot correctly ;-).
> My thought was now to tweak the linker script in the same way the
> original linker scripts of pic32 work:
> kseg0_program_mem (rx) : ORIGIN = 0x9D000000, LENGTH = 0x80000
> kseg1_boot_mem : ORIGIN = 0xBFC00000, LENGTH = 0x490
> .reset _RESET_ADDR :
> } > kseg1_boot_mem
> In assembler I can then simply write:
> .section .reset,code and
> .section .reset.startup,code
> and then the code, this will automagically end up in the
> kseg1_boot_mem, but this does not work with the inline assembler. Any
> ideas on how to do this the correct way? Is there something more
> intelligent than to write a plain assembler file?
You should be able to use
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