58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
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/*
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* drivers/video/tegra/host/t124/cpuaccess_t124.c
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*
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* Tegra Graphics Host Cpu Register Access
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*
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* Copyright (c) 2011-2016, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "../nvhost_cpuaccess.h"
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#include "../dev.h"
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#include "t124.h"
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#include "hardware_t124.h"
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static int t124_cpuaccess_mutex_try_lock(struct nvhost_cpuaccess *ctx,
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unsigned int idx)
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{
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struct nvhost_master *dev = cpuaccess_to_dev(ctx);
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nvhost_dbg_fn("");
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/* mlock registers returns 0 when the lock is aquired.
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* writing 0 clears the lock. */
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return !!host1x_sync_readl(dev, (host1x_sync_mlock_0_0_r() + idx * 4));
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}
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static void t124_cpuaccess_mutex_unlock(struct nvhost_cpuaccess *ctx,
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unsigned int idx)
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{
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struct nvhost_master *dev = cpuaccess_to_dev(ctx);
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nvhost_dbg_fn("");
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host1x_sync_writel(dev, (host1x_sync_mlock_0_0_r() + idx * 4), 0);
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}
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int nvhost_init_t124_cpuaccess_support(struct nvhost_master *host,
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struct nvhost_chip_support *op)
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{
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host->nb_modules = NVHOST_MODULE_NUM;
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op->cpuaccess.mutex_try_lock = t124_cpuaccess_mutex_try_lock;
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op->cpuaccess.mutex_unlock = t124_cpuaccess_mutex_unlock;
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return 0;
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}
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