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linux/arch/arm/mach-mvebu/pmsu.h

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arm: mvebu: Add initial support for power managmement service unit The Armada 370 and Armada XP SOCs have a power management service unit which is responsible for powering down and waking up CPUs and other SOC units. This patch adds support for this unit. Signed-off-by: Yehuda Yitschak <yehuday@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2012-08-02 12:17:51 +04:00
/*
* Power Management Service Unit (PMSU) support for Armada 370/XP platforms.
*
* Copyright (C) 2012 Marvell
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __MACH_MVEBU_PMSU_H
#define __MACH_MVEBU_PMSU_H
int armada_xp_boot_cpu(unsigned int cpu_id, void *phys_addr);
ARM: mvebu: add a common function for the boot address work around On some of the mvebu SoCs and due to internal BootROM issue, the CPU initial jump code must be placed in the SRAM memory of the SoC. In order to achieve this, we have to unmap the BootROM and at some specific location where the BootROM was placed, create a dedicated MBus window for the SRAM. This SRAM is initialized with a few instructions of code that allows to jump to the real secondary CPU boot address. The SRAM used is the Crypto engine one. This work around is currently needed for booting SMP on Armada 375 Z1 and will be needed for cpuidle support on Armada 370. Instead of duplicating the same code, this commit introduces a common function to handle it: mvebu_setup_boot_addr_wa(). Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1406120453-29291-4-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-07-23 17:00:40 +04:00
int mvebu_setup_boot_addr_wa(unsigned int crypto_eng_target,
unsigned int crypto_eng_attribute,
phys_addr_t resume_addr_reg);
arm: mvebu: Add initial support for power managmement service unit The Armada 370 and Armada XP SOCs have a power management service unit which is responsible for powering down and waking up CPUs and other SOC units. This patch adds support for this unit. Signed-off-by: Yehuda Yitschak <yehuday@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2012-08-02 12:17:51 +04:00
ARM: mvebu: rename the armada_370_xp symbols to mvebu_v7 in pmsu.c Most of the function related to the PMSU are not specific to the Armada 370 or Armada XP SoCs. They can also be used for most of the other mvebu ARMv7 SoCs, and will actually be used to support cpuidle on Armada 38x. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1406120453-29291-6-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-07-23 17:00:42 +04:00
void mvebu_v7_pmsu_idle_exit(void);
ARM: mvebu: implement suspend/resume support for Armada XP This commit implements the core of the platform code to enable suspend/resume on Armada XP. It registers the platform_suspend_ops structure, and implements the ->enter() hook of this structure. It is worth mentioning that this commit only provides the SoC-level part of suspend/resume, which calls into some board-specific code provided in a follow-up commit. The most important thing that this SoC-level code has to do is to build an in-memory structure that contains a magic number, the return address in the kernel after resume, and a set of address/value pairs. This structure is used by the bootloader to restore a certain number of registers (according to the set of address/value pairs) and then jump back into the kernel at the provided location. The code also puts the SDRAM into self-refresh mode, before calling into board-specific code to actually enter the suspend to RAM state. [ jac - add email exchange between Andrew Lunn and Thomas Petazzoni to better describe who consumes the address/value pairs ] > > Is this a well defined mechanism supported by mainline uboot, barebox > > etc. Or is it some Marvell extension to their uboot? > > As far as I know, it is a Marvell extension to their "binary header", > so it's done even before U-Boot starts. Since the hardware needs > assistance from the bootloader to do suspend/resume, there is > necessarily a certain amount of cooperation/agreement needed by what > the kernel does and what the bootloader expects. I'm not sure there's > any "standard" mechanism here. Do you know of any? > > I know the suspend/resume on the Blackfin architecture works the same > way (at least it used to work that way years ago when I did a bit of > Blackfin stuff). And here as well, there was some cooperation between > the kernel and the bootloader. See > arch/blackfin/mach-common/dpmc_modes.S, function do_hibernate() at the > end. > Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1416585613-2113-10-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-11-21 19:00:06 +03:00
void armada_370_xp_cpu_resume(void);
ARM: mvebu: rename the armada_370_xp symbols to mvebu_v7 in pmsu.c Most of the function related to the PMSU are not specific to the Armada 370 or Armada XP SoCs. They can also be used for most of the other mvebu ARMv7 SoCs, and will actually be used to support cpuidle on Armada 38x. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1406120453-29291-6-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-07-23 17:00:42 +04:00
ARM: mvebu: Clean-up the Armada XP support This patch removes the unneeded include of the armada-370-xp.h header. It also moves some declarations from this file into more accurate places. Finally, it also adds a comment explaining that we can't remove yet the smp field in the dt machine struct due to backward compatibly of the device tree. In a few releases, when the old device tree will be obsolete, we will be able to remove the smp field and then the armada-370-xp.h header. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1414669184-16785-2-git-send-email-gregory.clement@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-10-30 14:39:41 +03:00
int armada_370_xp_pmsu_idle_enter(unsigned long deepidle);
ARM: mvebu: Implement the CPU hotplug support for the Armada 38x SoCs This commit implements the CPU hotplug support for the Marvell Armada 38x platform. Similarly to what was done for the Armada XP, this commit: * Implements the ->cpu_die() function of SMP operations by calling armada_38x_do_cpu_suspend() to enter the deep idle state for CPUs going offline. * Implements a dummy ->cpu_kill() function, simply needed for the kernel to know we have CPU hotplug support. * The mvebu_cortex_a9_boot_secondary() function makes sure to wake up the CPU if waiting in deep idle state by sending an IPI before deasserting the CPUs from reset. This is because mvebu_cortex_a9_boot_secondary() is now used in two different situations: for the initial boot of secondary CPUs (where CPU reset deassert is used to wake up CPUs) and for CPU hotplug (where an IPI is used to take CPU out of deep idle). * At boot time, we exit from the idle state in the ->smp_secondary_init() hook. This commit has been tested using CPU hotplug through sysfs (/sys/devices/system/cpu/cpuX/online) and using kexec. Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1414669184-16785-5-git-send-email-gregory.clement@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-10-30 14:39:44 +03:00
int armada_38x_do_cpu_suspend(unsigned long deepidle);
arm: mvebu: Add initial support for power managmement service unit The Armada 370 and Armada XP SOCs have a power management service unit which is responsible for powering down and waking up CPUs and other SOC units. This patch adds support for this unit. Signed-off-by: Yehuda Yitschak <yehuday@marvell.com> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2012-08-02 12:17:51 +04:00
#endif /* __MACH_370_XP_PMSU_H */
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