Re: [ECOS] Stand-alone application working from RAM

[Jesper Skov <jskov at redhat dot com>]

>>>>> "Jurica" == Jurica Baricevic <jura@INTESIS.hr> writes:

Jurica> forgot to write it?). So, now I am going to link my
Jurica> application to 0x80000000 (my rom_vectors section is at the
Jurica> beginning of code) and hope that it will work.  Otherwise, I
Jurica> will have to go deeper into HAL...  Anyway, I wonder is there
Jurica> maybe anything else that I should care about?

Yes, that might do it.

Alternatively have the hal_memc_init macro copy the vectors there. I
have the below (in a still not published platform HAL):

(from platform.inc)

#if !defined(CYG_HAL_STARTUP_RAM) || !defined(CYGSEM_HAL_USE_ROM_MONITOR)
        .macro  hal_memc_init
        <possibly init memory controllers here!>
#if !defined(CYGSEM_HAL_USE_ROM_MONITOR)
        // If we don't play nice with a ROM monitor, copy the required
        // vectors into the proper location.
        la      t0,0x80000000           # dest addr
        la      t1,utlb_vector          # source addr
        la      t3,utlb_vector_end      # end dest addr
1:      
        lw      v0,0(t1)                # get word
        addi    t1,t1,4
        sw      v0,0(t0)                # write word
        addi    t0,t0,4
        bne     t1,t3,1b
        nop

        la      t0,0x80000180           # dest addr
        la      t1,other_vector         # source addr
        la      t3,other_vector_end     # end dest addr
1:      
        lw      v0,0(t1)                # get word
        addi    t1,t1,4
        sw      v0,0(t0)                # write word
        addi    t0,t0,4
        bne     t1,t3,1b
        nop
#endif
        .endm
#define CYGPKG_HAL_MIPS_MEMC_DEFINED        
#endif


Jesper