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