85 lines
2.5 KiB
Plaintext
85 lines
2.5 KiB
Plaintext
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#ifdef INCLUDE_PROC
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process(PROC_IDLE, #idle, #idle_recv)
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#endif
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/******************************************************************************
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* IDLE data segment
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*****************************************************************************/
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#ifdef INCLUDE_DATA
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#endif
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/******************************************************************************
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* IDLE code segment
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*****************************************************************************/
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#ifdef INCLUDE_CODE
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// description
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//
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// $r15 - current (idle)
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// $r14 - message
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// $r0 - zero
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idle_recv:
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ret
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// description
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//
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// $r15 - current (idle)
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// $r0 - zero
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idle:
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// set our "no interrupt has occurred during our execution" flag
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bset $flags $p0
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// count IDLE invocations for debugging purposes
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nv_iord($r1, NV_PPWR_DSCRATCH(1))
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add b32 $r1 1
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nv_iowr(NV_PPWR_DSCRATCH(1), $r1)
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// keep looping while there's pending messages for any process
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idle_loop:
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mov $r1 #proc_list_head
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bclr $flags $p2
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idle_proc:
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// process the process' messages until there's none left
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idle_proc_exec:
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push $r1
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mov b32 $r14 $r1
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call(recv)
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pop $r1
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bra not $p1 #idle_proc_next
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bset $flags $p2
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bra #idle_proc_exec
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// next process!
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idle_proc_next:
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add b32 $r1 #proc_size
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cmp b32 $r1 $r15
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bra ne #idle_proc
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bra $p2 #idle_loop
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// sleep if no interrupts have occurred
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sleep $p0
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bra #idle
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#endif
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