-/*
- * rse_switch_context
- *
- * 1. Save old RSC onto the new stack frame
- * 2. Save PFS onto new stack frame
- * 3. Cover the old frame and start a new frame.
- * 4. Save IFS onto new stack frame
- * 5. Save the old BSPSTORE on the new stack frame
- * 6. Save the old RNAT on the new stack frame
- * 7. Write BSPSTORE with the new backing store pointer
- * 8. Read and save the new BSP to calculate the #dirty registers
- * NOTE: Look at pages 11-10, 11-11 in PRM Vol 2
- */
-#define rse_switch_context(temp,p_stackframe,p_bspstore) \
- ;; \
- mov temp=ar.rsc;; \
- st8 [p_stackframe]=temp,8;; \
- mov temp=ar.pfs;; \
- st8 [p_stackframe]=temp,8; \
- cover ;; \
- mov temp=cr.ifs;; \
- st8 [p_stackframe]=temp,8;; \
- mov temp=ar.bspstore;; \
- st8 [p_stackframe]=temp,8;; \
- mov temp=ar.rnat;; \
- st8 [p_stackframe]=temp,8; \
- mov ar.bspstore=p_bspstore;; \
- mov temp=ar.bsp;; \
- sub temp=temp,p_bspstore;; \
- st8 [p_stackframe]=temp,8;;
-
-/*
- * rse_return_context
- * 1. Allocate a zero-sized frame
- * 2. Store the number of dirty registers RSC.loadrs field
- * 3. Issue a loadrs to insure that any registers from the interrupted
- * context which were saved on the new stack frame have been loaded
- * back into the stacked registers
- * 4. Restore BSPSTORE
- * 5. Restore RNAT
- * 6. Restore PFS
- * 7. Restore IFS
- * 8. Restore RSC
- * 9. Issue an RFI
- */
-#define rse_return_context(psr_mask_reg,temp,p_stackframe) \
- ;; \
- alloc temp=ar.pfs,0,0,0,0; \
- add p_stackframe=rse_ndirty_offset,p_stackframe;; \
- ld8 temp=[p_stackframe];; \
- shl temp=temp,16;; \
- mov ar.rsc=temp;; \
- loadrs;; \
- add p_stackframe=-rse_ndirty_offset+rse_bspstore_offset,p_stackframe;;\
- ld8 temp=[p_stackframe];; \
- mov ar.bspstore=temp;; \
- add p_stackframe=-rse_bspstore_offset+rse_rnat_offset,p_stackframe;;\
- ld8 temp=[p_stackframe];; \
- mov ar.rnat=temp;; \
- add p_stackframe=-rse_rnat_offset+rse_pfs_offset,p_stackframe;; \
- ld8 temp=[p_stackframe];; \
- mov ar.pfs=temp;; \
- add p_stackframe=-rse_pfs_offset+rse_ifs_offset,p_stackframe;; \
- ld8 temp=[p_stackframe];; \
- mov cr.ifs=temp;; \
- add p_stackframe=-rse_ifs_offset+rse_rsc_offset,p_stackframe;; \
- ld8 temp=[p_stackframe];; \
- mov ar.rsc=temp ; \
- mov temp=psr;; \
- or temp=temp,psr_mask_reg;; \
- mov cr.ipsr=temp;; \
- mov temp=ip;; \
- add temp=0x30,temp;; \
- mov cr.iip=temp;; \
- srlz.i;; \
- rfi;;