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Commit7232398abc("ARM: tegra: Convert PMC to a driver") changed tegra_resume() location storing from late to early and, as a result, broke suspend on Tegra20. PMC scratch register 41 is used by tegra LP1 resume code for retrieving stored physical memory address of common resume function and in the same time used by tegra20_cpu_shutdown() (shared by Tegra20 cpuidle driver and platform SMP code), which is storing CPU1 "resettable" status. It implies strict order of scratch register usage, otherwise resume function address is lost on Tegra20 after disabling non-boot CPU's on suspend. Fix it by storing "resettable" status in IRAM instead of PMC scratch register. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Fixes:7232398abc(ARM: tegra: Convert PMC to a driver) Cc: <stable@vger.kernel.org> # v3.17+ Signed-off-by: Thierry Reding <treding@nvidia.com>
155 lines
4.2 KiB
C
155 lines
4.2 KiB
C
/*
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* Copyright (c) 2010-2013, 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 "iomap.h"
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#include "irammap.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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#define TEGRA_APB_MISC_VIRT (TEGRA_APB_MISC_BASE - IO_APB_PHYS \
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+ IO_APB_VIRT)
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#define TEGRA_PMC_VIRT (TEGRA_PMC_BASE - IO_APB_PHYS + IO_APB_VIRT)
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#define TEGRA_IRAM_RESET_BASE_VIRT (IO_IRAM_VIRT + \
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TEGRA_IRAM_RESET_HANDLER_OFFSET)
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/* PMC_SCRATCH37-39 and 41 are used for tegra_pen_lock and idle */
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#define PMC_SCRATCH37 0x130
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#define PMC_SCRATCH38 0x134
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#define PMC_SCRATCH39 0x138
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#define PMC_SCRATCH41 0x140
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#ifdef CONFIG_ARCH_TEGRA_2x_SOC
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#define CPU_RESETTABLE 2
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#define CPU_RESETTABLE_SOON 1
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#define CPU_NOT_RESETTABLE 0
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#endif
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/* flag of tegra_disable_clean_inv_dcache to do LoUIS or all */
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#define TEGRA_FLUSH_CACHE_LOUIS 0
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#define TEGRA_FLUSH_CACHE_ALL 1
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#ifdef __ASSEMBLY__
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/* waits until the microsecond counter (base) is > rn */
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.macro wait_until, rn, base, tmp
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add \rn, \rn, #1
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1001: ldr \tmp, [\base]
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cmp \tmp, \rn
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bmi 1001b
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.endm
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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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/* Marco to check CPU part num */
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.macro check_cpu_part_num part_num, tmp1, tmp2
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mrc p15, 0, \tmp1, c0, c0, 0
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ubfx \tmp1, \tmp1, #4, #12
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mov32 \tmp2, \part_num
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cmp \tmp1, \tmp2
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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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#ifdef CONFIG_HAVE_ARM_SCU
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check_cpu_part_num 0xc09, \tmp1, \tmp2
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mrceq p15, 0, \tmp1, c0, c0, 5
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andeq \tmp1, \tmp1, #0xF
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moveq \tmp1, \tmp1, lsl #2
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moveq \tmp2, #0xf
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moveq \tmp2, \tmp2, lsl \tmp1
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ldreq \tmp1, =(TEGRA_ARM_PERIF_VIRT + 0xC)
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streq \tmp2, [\tmp1] @ invalidate SCU tags for CPU
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dsb
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#endif
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.endm
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/* Macro to check Tegra revision */
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#define APB_MISC_GP_HIDREV 0x804
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.macro tegra_get_soc_id base, tmp1
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mov32 \tmp1, \base
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ldr \tmp1, [\tmp1, #APB_MISC_GP_HIDREV]
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and \tmp1, \tmp1, #0xff00
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mov \tmp1, \tmp1, lsr #8
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.endm
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#else
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void tegra_pen_lock(void);
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void tegra_pen_unlock(void);
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void tegra_resume(void);
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int tegra_sleep_cpu_finish(unsigned long);
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void tegra_disable_clean_inv_dcache(u32 flag);
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#ifdef CONFIG_HOTPLUG_CPU
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void tegra20_hotplug_shutdown(void);
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void tegra30_hotplug_shutdown(void);
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#endif
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void tegra20_cpu_shutdown(int cpu);
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int tegra20_cpu_is_resettable_soon(void);
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void tegra20_cpu_clear_resettable(void);
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#ifdef CONFIG_ARCH_TEGRA_2x_SOC
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void tegra20_cpu_set_resettable_soon(void);
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#else
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static inline void tegra20_cpu_set_resettable_soon(void) {}
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#endif
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int tegra20_sleep_cpu_secondary_finish(unsigned long);
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void tegra20_tear_down_cpu(void);
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int tegra30_sleep_cpu_secondary_finish(unsigned long);
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void tegra30_tear_down_cpu(void);
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#endif
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#endif
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