| /* |
| * 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 |
