From: santosh.shilimkar@ti•com (Santosh)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 14/25] OMAP4: PM: Add CPUX OFF mode support
Date: Fri, 09 Sep 2011 13:39:51 +0530 [thread overview]
Message-ID: <4E69C9CF.6090709@ti.com> (raw)
In-Reply-To: <20110909080416.GF31581@S2100-06.ap.freescale.net>
On Friday 09 September 2011 01:34 PM, Shawn Guo wrote:
> Hi Santosh,
>
> On Sun, Sep 04, 2011 at 07:24:15PM +0530, Santosh Shilimkar wrote:
>> This patch adds the CPU0 and CPU1 off mode support. CPUX close switch
>> retention (CSWR) is not supported by hardware design.
>>
>> The CPUx OFF mode isn't supported on OMAP4430 ES1.0
>>
>> CPUx sleep code is common for hotplug, suspend and CPUilde.
>>
>> Signed-off-by: Santosh Shilimkar<santosh.shilimkar@ti•com>
>> Cc: Kevin Hilman<khilman@ti•com>
>> ---
>> arch/arm/mach-omap2/Makefile | 3 +-
>> arch/arm/mach-omap2/include/mach/omap-secure.h | 8 +
>> arch/arm/mach-omap2/include/mach/omap4-common.h | 25 +++
>> arch/arm/mach-omap2/omap-mpuss-lowpower.c | 249 +++++++++++++++++++++++
>> arch/arm/mach-omap2/omap-smp.c | 6 +
>> arch/arm/mach-omap2/omap4-sar-layout.h | 9 +
>> arch/arm/mach-omap2/pm44xx.c | 6 +
>> arch/arm/mach-omap2/sleep44xx.S | 213 +++++++++++++++++++
>> 8 files changed, 518 insertions(+), 1 deletions(-)
>> create mode 100644 arch/arm/mach-omap2/omap-mpuss-lowpower.c
>>
>
> [...]
>
>> diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
>> index 049f426..230ab8c 100644
>> --- a/arch/arm/mach-omap2/sleep44xx.S
>> +++ b/arch/arm/mach-omap2/sleep44xx.S
>> @@ -11,8 +11,221 @@
>>
>> #include<linux/linkage.h>
>> #include<asm/system.h>
>> +#include<asm/smp_scu.h>
>> +#include<asm/memory.h>
>> +#include<asm/hardware/cache-l2x0.h>
>>
>> +#include<plat/omap44xx.h>
>> #include<mach/omap4-common.h>
>> +#include<mach/omap-secure.h>
>> +
>> +#include "omap4-sar-layout.h"
>> +
>> +#ifdef CONFIG_SMP
>> +
>> +.macro DO_SMC
>> + dsb
>> + smc #0
>> + dsb
>> +.endm
>> +
>> +ppa_zero_params:
>> + .word 0x0
>> +
>> +/*
>> + * =============================
>> + * == CPU suspend finisher ==
>> + * =============================
>> + *
>> + * void omap4_finish_suspend(unsigned long cpu_state)
>> + *
>> + * This function code saves the CPU context and performs the CPU
>> + * power down sequence. Calling WFI effectively changes the CPU
>> + * power domains states to the desired target power state.
>> + *
>> + * @cpu_state : contains context save state (r0)
>> + * 0 - No context lost
>> + * 1 - CPUx L1 and logic lost: MPUSS CSWR
>> + * 2 - CPUx L1 and logic lost + GIC lost: MPUSS OSWR
>> + * 3 - CPUx L1 and logic lost + GIC + L2 lost: MPUSS OFF
>
> I was told by rmk that same as imx6q, omap44xx will retain L2 content
> across suspen/resume cycle. Then what does "L2 lost" mean here? Or
> what rmk meant is the case cpu_state == 2?
>
Yes.
The last case is entire SOC OFF. We call Device OFF in OMAP.
All voltages will scale to 0 V. This isn't supported by this
series.
Regards
Santosh
next prev parent reply other threads:[~2011-09-09 8:09 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-04 13:54 [PATCH 00/25] OMAP4: PM: suspend, CPU-hotplug and CPUilde support Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 01/25] ARM: mm: Add strongly ordered descriptor support Santosh Shilimkar
2011-09-13 20:23 ` Tony Lindgren
2011-09-14 5:36 ` Shilimkar, Santosh
2011-09-04 13:54 ` [PATCH 02/25] OMAP4: Redefine mandatory barriers for OMAP to include interconnect barriers Santosh Shilimkar
2011-09-13 20:27 ` Tony Lindgren
2011-09-14 5:39 ` Shilimkar, Santosh
2011-09-14 10:24 ` Santosh
2011-09-15 17:17 ` Kevin Hilman
2011-09-15 17:24 ` Shilimkar, Santosh
2011-09-15 17:53 ` Tony Lindgren
2011-09-15 18:22 ` Shilimkar, Santosh
2011-09-15 19:43 ` Tony Lindgren
2011-09-15 20:00 ` Shilimkar, Santosh
2011-09-16 12:01 ` Shilimkar, Santosh
2011-09-04 13:54 ` [PATCH 03/25] OMAP4: PM: Use custom omap_do_wfi() for suspend and default idle Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 04/25] OMAP4: Remove un-used do_wfi() macro Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 05/25] OMAP4: Use WARN_ON() instead of BUG_ON() with graceful exit Santosh Shilimkar
2011-09-05 10:11 ` Sergei Shtylyov
2011-09-05 10:42 ` Santosh
2011-09-05 10:47 ` Russell King - ARM Linux
2011-09-05 10:51 ` Santosh
2011-09-08 18:51 ` Jean Pihet
2011-09-04 13:54 ` [PATCH 06/25] OMAP4: Export omap4_get_base*() rather than global address pointers Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 07/25] OMAP4: PM: Add SAR RAM support Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 08/25] OMAP4: PM: Keep static dep between MPUSS-EMIF and MPUSS-L3 and DUCATI-L3 Santosh Shilimkar
2011-09-08 18:06 ` Kevin Hilman
2011-09-09 4:21 ` Santosh
2011-09-04 13:54 ` [PATCH 09/25] OMAP4: PM: Avoid omap4_pm_init() on OMAP4430 ES1.0 Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 10/25] OMAP4: PM: Initialise all the clockdomains to supported states Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 11/25] OMAP: Add Secure HAL and monitor mode API infrastructure Santosh Shilimkar
2011-09-08 18:58 ` Jean Pihet
2011-09-09 4:22 ` Santosh
2011-09-04 13:54 ` [PATCH 12/25] OMAP: Add support to allocate the memory for secure RAM Santosh Shilimkar
2011-09-08 19:19 ` Jean Pihet
2011-09-09 9:43 ` Santosh
2011-09-09 12:54 ` Jean Pihet
2011-09-09 14:09 ` Shilimkar, Santosh
2011-09-04 13:54 ` [PATCH 13/25] OMAP4: PM: Add WakeupGen module as OMAP gic_arch_extn Santosh Shilimkar
2011-09-08 18:27 ` Kevin Hilman
2011-09-09 4:29 ` Santosh
2011-09-09 7:19 ` Thomas Gleixner
2011-09-09 8:07 ` Santosh
2011-09-09 8:18 ` Thomas Gleixner
2011-09-09 9:05 ` Santosh
2011-09-12 7:56 ` Thomas Gleixner
2011-09-12 8:44 ` Santosh
2011-09-08 19:16 ` Jean Pihet
2011-09-09 4:23 ` Santosh
2011-09-13 20:36 ` Tony Lindgren
2011-09-14 5:34 ` Shilimkar, Santosh
2011-09-14 15:21 ` Tony Lindgren
2011-09-14 16:49 ` Santosh
2011-09-14 17:08 ` Tony Lindgren
2011-09-14 17:13 ` Santosh
2011-09-14 17:18 ` Tony Lindgren
2011-09-14 17:21 ` Santosh
2011-09-14 17:22 ` Santosh
2011-09-14 19:04 ` Tony Lindgren
2011-09-15 2:57 ` Santosh
2011-09-15 9:36 ` Cousson, Benoit
2011-09-15 12:02 ` Shilimkar, Santosh
2011-09-15 13:29 ` Woodruff, Richard
2011-09-04 13:54 ` [PATCH 14/25] OMAP4: PM: Add CPUX OFF mode support Santosh Shilimkar
2011-09-08 19:39 ` Jean Pihet
2011-09-09 9:59 ` Santosh
2011-09-09 8:04 ` Shawn Guo
2011-09-09 8:09 ` Santosh [this message]
2011-09-09 14:13 ` Shawn Guo
2011-09-09 14:11 ` Shilimkar, Santosh
2011-09-09 15:27 ` Shawn Guo
2011-09-09 16:59 ` Santosh
2011-09-09 18:34 ` Kevin Hilman
2011-09-10 3:39 ` Shilimkar, Santosh
2011-09-09 23:34 ` Shawn Guo
2011-09-10 3:38 ` Shilimkar, Santosh
2011-09-10 4:54 ` Shawn Guo
2011-09-10 5:51 ` Santosh
2011-09-12 21:06 ` Kevin Hilman
2011-09-13 5:39 ` Santosh
2011-09-13 17:33 ` Kevin Hilman
2011-09-14 5:26 ` Shilimkar, Santosh
2011-09-04 13:54 ` [PATCH 15/25] OMAP4: Remove __INIT from omap_secondary_startup() to re-use it for hotplug Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 16/25] OMAP4: PM: Program CPU1 to hit OFF when off-lined Santosh Shilimkar
2011-09-12 21:12 ` Kevin Hilman
2011-09-13 5:35 ` Santosh
2011-09-04 13:54 ` [PATCH 17/25] OMAP4: PM: CPU1 wakeup workaround from Low power modes Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 18/25] OMAP4: suspend: Add MPUSS power domain RETENTION support Santosh Shilimkar
2011-09-15 0:27 ` Kevin Hilman
2011-09-15 3:19 ` Santosh
2011-09-04 13:54 ` [PATCH 19/25] OMAP4: PM: Add WakeupGen and secure GIC low power support Santosh Shilimkar
2011-09-04 13:54 ` [PATCH 20/25] OMAP4: PM: Add L2X0 cache lowpower support Santosh Shilimkar
2011-09-05 14:01 ` Lorenzo Pieralisi
2011-09-05 14:13 ` Santosh
2011-09-16 17:23 ` Kevin Hilman
2011-09-18 8:46 ` Santosh
2011-09-04 13:54 ` [PATCH 21/25] OMAP4: PM: Add MPUSS power domain OSWR support Santosh Shilimkar
2011-09-12 18:52 ` Kevin Hilman
2011-09-13 5:37 ` Santosh
2011-09-13 7:39 ` Jean Pihet
2011-09-13 8:25 ` Santosh
2011-09-04 13:54 ` [PATCH 22/25] OMAP4: PM: Add power domain statistics support Santosh Shilimkar
2011-09-05 10:08 ` Sergei Shtylyov
2011-09-05 10:43 ` Santosh
2011-09-04 13:54 ` [PATCH 23/25] OMAP4: PM: Add CPUidle support Santosh Shilimkar
2011-09-16 17:45 ` Kevin Hilman
2011-09-18 8:47 ` Santosh
2011-09-04 13:54 ` [PATCH 24/25] OMAP4: cpuidle: Switch to gptimer from twd in deeper C-states Santosh Shilimkar
2011-09-16 17:51 ` Kevin Hilman
2011-09-18 8:48 ` Santosh
2011-09-04 13:54 ` [PATCH 25/25] OMAP3: CPUidle: Make use of CPU PM notifiers Santosh Shilimkar
2011-09-08 17:57 ` Kevin Hilman
2011-09-09 4:20 ` Santosh
2011-09-09 7:17 ` Santosh
2011-09-08 20:15 ` [PATCH 00/25] OMAP4: PM: suspend, CPU-hotplug and CPUilde support Jean Pihet
2011-09-09 4:25 ` Santosh
2011-09-20 11:24 ` Vishwanath Sripathy
2011-09-20 11:37 ` Santosh
2011-09-20 11:57 ` Santosh
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