453689e407
Hotplug function put CPU in offline or online mode at runtime. When the CPU been put into offline, it was been clock gated. The offline CPU can be power gated, when the remaining CPU goes into LP2. Based on the worked by: Colin Cross <ccross@android.com> Gary King <gking@nvidia.com> Signed-off-by: Joseph Lo <josephl@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*
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* Copyright (c) 2010-2012, 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MACH_TEGRA_SLEEP_H
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#define __MACH_TEGRA_SLEEP_H
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#include <mach/iomap.h>
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#define TEGRA_ARM_PERIF_VIRT (TEGRA_ARM_PERIF_BASE - IO_CPU_PHYS \
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+ IO_CPU_VIRT)
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#define TEGRA_FLOW_CTRL_VIRT (TEGRA_FLOW_CTRL_BASE - IO_PPSB_PHYS \
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+ IO_PPSB_VIRT)
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#define TEGRA_CLK_RESET_VIRT (TEGRA_CLK_RESET_BASE - IO_PPSB_PHYS \
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+ IO_PPSB_VIRT)
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#ifdef __ASSEMBLY__
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/* returns the offset of the flow controller halt register for a cpu */
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.macro cpu_to_halt_reg rd, rcpu
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cmp \rcpu, #0
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subne \rd, \rcpu, #1
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movne \rd, \rd, lsl #3
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addne \rd, \rd, #0x14
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moveq \rd, #0
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.endm
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/* returns the offset of the flow controller csr register for a cpu */
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.macro cpu_to_csr_reg rd, rcpu
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cmp \rcpu, #0
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subne \rd, \rcpu, #1
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movne \rd, \rd, lsl #3
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addne \rd, \rd, #0x18
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moveq \rd, #8
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.endm
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/* returns the ID of the current processor */
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.macro cpu_id, rd
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mrc p15, 0, \rd, c0, c0, 5
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and \rd, \rd, #0xF
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.endm
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/* loads a 32-bit value into a register without a data access */
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.macro mov32, reg, val
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movw \reg, #:lower16:\val
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movt \reg, #:upper16:\val
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.endm
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/* Macro to exit SMP coherency. */
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.macro exit_smp, tmp1, tmp2
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mrc p15, 0, \tmp1, c1, c0, 1 @ ACTLR
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bic \tmp1, \tmp1, #(1<<6) | (1<<0) @ clear ACTLR.SMP | ACTLR.FW
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mcr p15, 0, \tmp1, c1, c0, 1 @ ACTLR
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isb
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cpu_id \tmp1
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mov \tmp1, \tmp1, lsl #2
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mov \tmp2, #0xf
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mov \tmp2, \tmp2, lsl \tmp1
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mov32 \tmp1, TEGRA_ARM_PERIF_VIRT + 0xC
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str \tmp2, [\tmp1] @ invalidate SCU tags for CPU
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dsb
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.endm
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#else
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#ifdef CONFIG_HOTPLUG_CPU
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void tegra20_hotplug_init(void);
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void tegra30_hotplug_init(void);
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#else
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static inline void tegra20_hotplug_init(void) {}
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static inline void tegra30_hotplug_init(void) {}
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#endif
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#endif
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#endif
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