[ECOS] Re: Problem with memory layout (.ldi file)
Fri Apr 3 07:17:00 GMT 2009
Himanshu Patel wrote:
> We are porting eCos onto board with LPC2458 processor. The board has
> segmented RAM memory speared across 32-bit address space.
> Segment 1: start address 0x40000000, Length = 0xFFE0
> Segment 2: Start address 0x7FE00000, Length = 0x4000
> We want to have .bss section mapped in section (Segment 1) and data and
> heap to be mapped in section(Segment 2). We tried to modify the .ldi and
> .h file. However we are getting error (heap.cxx: invalid operands of
> type "int" and "char" to binary operator).
A copy of the precise error message in context would help.
> SECTION_bss (sram, 0x40000540, FOLLOWING(.fixed_vectors))
The .bss section is not relocated from ROM, so the third parameter
should be LMA_EQ_VMA in the above line.
> .h file:
> #define CYGMEM_REGION_sram (0x40000000)
> #define CYGMEM_REGION_sram_SIZE (0x0000FFE0)
> #define CYGMEM_REGION_sram_ATTR (CYGMEM_REGION_ATTR_R | CYGMEM_REGION_ATTR_W)
You should add similar definitions to the .h file for memory region sram2.
I hope this helps
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