Andreas Schmidt

52235 - moving vector table to RAM

Discussion created by Andreas Schmidt on Jan 12, 2007
Latest reply on Jan 13, 2007 by Paolo Alcantara Cadillo
in the sysinit code, the vector table is copied to RAM

/* Copy the vector table to RAM */
if (__VECTOR_RAM != VECTOR_TABLE)
{
for (n = 0; n 256; n++)
__VECTOR_RAM[n] = VECTOR_TABLE[n];
}
mcf5xxx_wr_vbr((uint32)__VECTOR_RAM);



why does it has to like this. I tried to do just
mcf5xxx_wr_vbr((uint32)VECTOR_TABLE);
to use the vector table in flash, but this does not work at all.

I do not need to remap any irq vectors at runtime, so I hoped to use a fixed vector table undestroyable by errounous ram accesses.

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