# # Copyright (c) 2005 Jakub Jermar # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # - Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # - Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # - The name of the author may not be used to endorse or promote products # derived from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # #include #include #include #include .text /* * context_save_arch() is required not to create its own stack frame. See the * generic context.h for explanation. */ FUNCTION_BEGIN(context_save_arch) # # Force all our active register windows to memory so that we can find # them there even if e.g. the thread is migrated to another processor. # flushw stx %sp, [%o0 + CONTEXT_OFFSET_SP] stx %o7, [%o0 + CONTEXT_OFFSET_PC] stx %i0, [%o0 + CONTEXT_OFFSET_I0] stx %i1, [%o0 + CONTEXT_OFFSET_I1] stx %i2, [%o0 + CONTEXT_OFFSET_I2] stx %i3, [%o0 + CONTEXT_OFFSET_I3] stx %i4, [%o0 + CONTEXT_OFFSET_I4] stx %i5, [%o0 + CONTEXT_OFFSET_I5] stx %fp, [%o0 + CONTEXT_OFFSET_FP] stx %i7, [%o0 + CONTEXT_OFFSET_I7] stx %l0, [%o0 + CONTEXT_OFFSET_L0] stx %l1, [%o0 + CONTEXT_OFFSET_L1] stx %l2, [%o0 + CONTEXT_OFFSET_L2] stx %l3, [%o0 + CONTEXT_OFFSET_L3] stx %l4, [%o0 + CONTEXT_OFFSET_L4] stx %l5, [%o0 + CONTEXT_OFFSET_L5] stx %l6, [%o0 + CONTEXT_OFFSET_L6] stx %l7, [%o0 + CONTEXT_OFFSET_L7] stx %g7, [%o0 + CONTEXT_OFFSET_TP] retl mov 1, %o0 ! context_save_arch returns 1 FUNCTION_END(context_save_arch) FUNCTION_BEGIN(context_restore_arch) # # Forget all previous windows, they are not going to be needed again. # Enforce a window fill on the next RESTORE instruction by setting # CANRESTORE to zero and other window configuration registers # accordingly. Note that the same can be achieved by executing the # FLUSHW instruction, but since we don't need to remember the previous # windows, we do the former and save thus some unnecessary window # spills. # rdpr %pstate, %l0 andn %l0, PSTATE_IE_BIT, %l1 wrpr %l1, %pstate wrpr %g0, 0, %canrestore wrpr %g0, 0, %otherwin wrpr %g0, NWINDOWS - 2, %cansave wrpr %l0, %pstate ldx [%o0 + CONTEXT_OFFSET_SP], %sp ldx [%o0 + CONTEXT_OFFSET_PC], %o7 ldx [%o0 + CONTEXT_OFFSET_I0], %i0 ldx [%o0 + CONTEXT_OFFSET_I1], %i1 ldx [%o0 + CONTEXT_OFFSET_I2], %i2 ldx [%o0 + CONTEXT_OFFSET_I3], %i3 ldx [%o0 + CONTEXT_OFFSET_I4], %i4 ldx [%o0 + CONTEXT_OFFSET_I5], %i5 ldx [%o0 + CONTEXT_OFFSET_FP], %fp ldx [%o0 + CONTEXT_OFFSET_I7], %i7 ldx [%o0 + CONTEXT_OFFSET_L0], %l0 ldx [%o0 + CONTEXT_OFFSET_L1], %l1 ldx [%o0 + CONTEXT_OFFSET_L2], %l2 ldx [%o0 + CONTEXT_OFFSET_L3], %l3 ldx [%o0 + CONTEXT_OFFSET_L4], %l4 ldx [%o0 + CONTEXT_OFFSET_L5], %l5 ldx [%o0 + CONTEXT_OFFSET_L6], %l6 ldx [%o0 + CONTEXT_OFFSET_L7], %l7 ldx [%o0 + CONTEXT_OFFSET_TP], %g7 retl xor %o0, %o0, %o0 ! context_restore_arch returns 0 FUNCTION_END(context_restore_arch)