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1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24 25#ifdef INCLUDE_PROC26process(PROC_IDLE, #idle, #idle_recv)27#endif28 29/******************************************************************************30 * IDLE data segment31 *****************************************************************************/32#ifdef INCLUDE_DATA33#endif34 35/******************************************************************************36 * IDLE code segment37 *****************************************************************************/38#ifdef INCLUDE_CODE39// description40//41// $r15 - current (idle)42// $r14 - message43// $r0 - zero44idle_recv:45 ret46 47// description48//49// $r15 - current (idle)50// $r0 - zero51idle:52 // set our "no interrupt has occurred during our execution" flag53 bset $flags $p054 55 // count IDLE invocations for debugging purposes56 nv_iord($r1, NV_PPWR_DSCRATCH(1))57 add b32 $r1 158 nv_iowr(NV_PPWR_DSCRATCH(1), $r1)59 60 // keep looping while there's pending messages for any process61 idle_loop:62 mov $r1 #proc_list_head63 bclr $flags $p264 idle_proc:65 // process the process' messages until there's none left66 idle_proc_exec:67 push $r168 mov b32 $r14 $r169 call(recv)70 pop $r171 bra not $p1 #idle_proc_next72 bset $flags $p273 bra #idle_proc_exec74 // next process!75 idle_proc_next:76 add b32 $r1 #proc_size77 cmp b32 $r1 $r1578 bra ne #idle_proc79 bra $p2 #idle_loop80 81 // sleep if no interrupts have occurred82 sleep $p083 bra #idle84#endif85