PT_SP
stw sp, PT_SP(r24) /* Save user stack before changing */
stw r24, PT_SP(sp)
ldw sp, PT_SP(sp) /* Restore sp last */
OFFSET(PT_SP, pt_regs, sp);
REG_L sp, (SUSPEND_CONTEXT_REGS + PT_SP)(a0)
OFFSET(PT_SP, pt_regs, sp);