diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/idle.fuc')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/idle.fuc | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/idle.fuc b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/idle.fuc new file mode 100644 index 000000000000..98f1c3738b42 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/pmu/fuc/idle.fuc @@ -0,0 +1,84 @@ +/* + * 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 |