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02b4e2756e
linux/arch/arm/mach-imx
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Russell King 02b4e2756e ARM: v7 setup function should invalidate L1 cache 
All ARMv5 and older CPUs invalidate their caches in the early assembly
setup function, prior to enabling the MMU.  This is because the L1
cache should not contain any data relevant to the execution of the
kernel at this point; all data should have been flushed out to memory.

This requirement should also be true for ARMv6 and ARMv7 CPUs - indeed,
these typically do not search their caches when caching is disabled (as
it needs to be when the MMU is disabled) so this change should be safe.

ARMv7 allows there to be CPUs which search their caches while caching is
disabled, and it's permitted that the cache is uninitialised at boot;
for these, the architecture reference manual requires that an
implementation specific code sequence is used immediately after reset
to ensure that the cache is placed into a sane state.  Such
functionality is definitely outside the remit of the Linux kernel, and
must be done by the SoC's firmware before _any_ CPU gets to the Linux
kernel.

Changing the data cache clean+invalidate to a mere invalidate allows us
to get rid of a lot of platform specific hacks around this issue for
their secondary CPU bringup paths - some of which were buggy.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Tested-by: Wei Xu <xuwei5@hisilicon.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-06-01 11:30:26 +01:00
..
devices ARM: mx25: Remove imxdi_rtc platform code 2015-03-13 22:14:58 +08:00
3ds_debugboard.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
3ds_debugboard.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
anatop.c ARM: imx: add anatop settings for LPDDR2 when enter DSM mode 2014-11-23 14:56:17 +08:00
avic.c ARM: imx: avic: Convert to handle_domain_irq 2014-09-03 13:10:56 +00:00
board-mx31lilly.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
board-mx31lite.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
board-mx31moboard.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
clk-busy.c ARM: arm-soc non-critical fixes for 3.10 2013-05-02 08:56:55 -07:00
clk-cpu.c ARM: imx: add CPU clock type 2014-11-23 14:56:19 +08:00
clk-fixup-div.c ARM: imx: add common clock support for fixup div 2013-08-16 13:11:24 +08:00
clk-fixup-mux.c ARM: imx: initialize clk_init_data.flags for clk-fixup-mux 2013-09-17 10:04:23 +08:00
clk-gate2.c ARM: imx: correct the hardware clock gate setting for shared nodes 2015-01-05 20:53:05 +08:00
clk-gate-exclusive.c ARM: imx: add an exclusive gate clock type 2014-09-16 10:06:48 +08:00
clk-imx1.c ARM: i.MX: Use CLOCKSOURCE_OF_DECLARE() for DT targets 2014-07-18 16:11:39 +08:00
clk-imx6q.c ARM: imx6q: clk: Add support for mipi_ipg clock as a shared clock gate 2015-03-02 20:52:16 +08:00
clk-imx6sl.c ARM: imx: fix register offset of pll7_usb_host gate clock 2014-09-16 10:09:40 +08:00
clk-imx6sx.c ARM: Show proper respect for Heinrich Hertz by using the correct unit for frequency 2015-05-14 16:22:05 +01:00
clk-imx21.c ARM: i.MX: Use CLOCKSOURCE_OF_DECLARE() for DT targets 2014-07-18 16:11:39 +08:00
clk-imx25.c ARM: mx25: Remove mx25_clocks_init() 2015-03-13 22:06:30 +08:00
clk-imx27.c ARM: i.MX: Use CLOCKSOURCE_OF_DECLARE() for DT targets 2014-07-18 16:11:39 +08:00
clk-imx31.c ARM: i.MX clk: Move clock check function in common location 2014-07-18 16:10:12 +08:00
clk-imx35.c ARM: i.MX clk: Move clock check function in common location 2014-07-18 16:10:12 +08:00
clk-imx51-imx53.c ARM: imx53: clk: add ARM clock 2014-11-23 14:56:20 +08:00
clk-pfd.c ARM: imx: add necessary interface for pfd 2013-12-31 09:36:45 +08:00
clk-pllv1.c ARM: imx: pllv1: Fix PLL calculation for i.MX27 2013-12-31 09:36:29 +08:00
clk-pllv2.c ARM: mach-imx: clk-pllv2: Staticize clk_pllv2_ops 2013-04-01 16:17:50 +08:00
clk-pllv3.c ARM: imx: pllv3: add shift for frequency multiplier 2015-01-05 20:53:05 +08:00
clk-vf610.c ARM: imx: clk-vf610: Add clock for SNVS 2015-01-13 19:16:26 +08:00
clk.c ARM: i.MX clk: Move clock check function in common location 2014-07-18 16:10:12 +08:00
clk.h ARM: imx: pllv3: add shift for frequency multiplier 2015-01-05 20:53:05 +08:00
common.h ARM: imx6: Warn when an old DT is detected 2015-03-30 16:43:51 +08:00
cpu-imx5.c ARM: imx5: retrieve iim base from device tree 2014-07-18 16:10:07 +08:00
cpu-imx25.c ARM: mx25: Retrieve IIM base from dt 2015-03-13 22:06:35 +08:00
cpu-imx27.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
cpu-imx31.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
cpu-imx35.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
cpu.c ARM: i.MX: allow disabling supervisor protect via DT 2014-07-18 16:11:39 +08:00
cpuidle-imx5.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
cpuidle-imx6q.c ARM: cpuidle: Remove duplicate header inclusion 2015-03-23 18:03:11 +01:00
cpuidle-imx6sl.c ARM: cpuidle: Remove duplicate header inclusion 2015-03-23 18:03:11 +01:00
cpuidle-imx6sx.c ARM: cpuidle: Remove duplicate header inclusion 2015-03-23 18:03:11 +01:00
cpuidle.h ARM: imx: support arm power off in cpuidle for i.mx6sx 2015-01-05 21:34:29 +08:00
crmregs-imx3.h ARM i.MX3: Make ccm base address a variable 2012-04-25 17:03:45 +02:00
devices-imx1.h ARM: imx: move platform device code into mach-imx 2012-10-15 09:18:15 +08:00
devices-imx21.h ARM: imx: move platform device code into mach-imx 2012-10-15 09:18:15 +08:00
devices-imx27.h ARM : i.MX27 : split code for allocation of ressources of camera and eMMA 2012-11-16 16:21:48 +01:00
devices-imx31.h ARM: imx: move platform device code into mach-imx 2012-10-15 09:18:15 +08:00
devices-imx35.h ARM: imx: prepare for removal of flexcan_platform_data 2013-06-27 15:15:08 +02:00
ehci-imx27.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci-imx31.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci-imx35.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci.h ARM: imx5: remove imx51 non-DT support files 2014-07-18 16:10:05 +08:00
epit.c ARM: imx: remove IRQF_DISABLED 2013-10-21 09:11:05 +08:00
eukrea_mbimxsd35-baseboard.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
eukrea-baseboards.h ARM: i.MX: Remove mach-cpuimx27sd board file 2014-09-01 22:00:01 +08:00
gpc.c ARM: imx6: Warn when an old DT is detected 2015-03-30 16:43:51 +08:00
hardware.h ARM: mx25: Remove "mx25.h" header file 2015-03-13 22:14:58 +08:00
headsmp.S ARM: v7 setup function should invalidate L1 cache 2015-06-01 11:30:26 +01:00
hotplug.c ARM: imx: do not return from imx_cpu_die() call 2013-10-21 09:37:31 +08:00
iim.h ARM: imx: include iim.h rather than mach/iim.h 2012-10-15 10:03:10 +08:00
imx1-dt.c ARM: i.MX1: Add devicetree support 2014-09-16 10:06:44 +08:00
imx27-dt.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
imx31-dt.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
imx35-dt.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
iomux-imx31.c ARM: imx: refactor mxc_iomux_mode() 2014-11-22 07:39:36 +08:00
iomux-mx1.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx2x.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx3.h ARM: imx: Fix trivial typo in comments 2015-03-03 12:05:46 +08:00
iomux-mx21.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx27.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx35.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-v1.c ARM: imx: iomux: Do not export symbol without public declaration 2014-09-01 22:00:01 +08:00
iomux-v1.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-v3.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
iomux-v3.h ARM: imx: Fix trivial typo in comments 2015-03-03 12:05:46 +08:00
irq-common.c ARM: imx: irq-common: Include header to avoid sparse warning 2013-06-17 15:45:14 +08:00
irq-common.h ARM: imx: drop support for irq priorisation 2013-12-09 13:18:25 +08:00
Kconfig ARM: SoC platform updates for v4.1 2015-04-22 09:08:39 -07:00
mach-apf9328.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-armadillo5x0.c arm: mach-imx: Convert pr_warning to pr_warn 2014-09-16 10:09:41 +08:00
mach-bug.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-cpuimx35.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
mach-imx6q.c ARM: SoC late changes for v4.1 2015-04-22 09:24:55 -07:00
mach-imx6sl.c ARM: imx6: Warn when an old DT is detected 2015-03-30 16:43:51 +08:00
mach-imx6sx.c ARM: imx6: Warn when an old DT is detected 2015-03-30 16:43:51 +08:00
mach-imx25.c ARM: mx25: Remove static memory mapping 2015-03-13 22:14:57 +08:00
mach-imx27_visstrim_m10.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
mach-imx50.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
mach-imx51.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
mach-imx53.c ARM: SoC platform changes for 3.19 2014-12-09 14:38:28 -08:00
mach-kzm_arm11_01.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-ls1021a.c ARM: imx: Add Freescale LS1021A SMP support 2014-11-23 14:56:21 +08:00
mach-mx21ads.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-mx27_3ds.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
mach-mx27ads.c platform: Remove most references to platform_bus device 2014-07-23 19:09:03 -07:00
mach-mx31_3ds.c arm: mach-imx: Convert pr_warning to pr_warn 2014-09-16 10:09:41 +08:00
mach-mx31ads.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-mx31lilly.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
mach-mx31lite.c arm: mach-imx: Convert pr_warning to pr_warn 2014-09-16 10:09:41 +08:00
mach-mx31moboard.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mach-mx35_3ds.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
mach-pca100.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
mach-pcm037_eet.c ARM: imx: include common.h rather than mach/common.h 2012-10-15 10:03:10 +08:00
mach-pcm037.c arm: mach-imx: Convert pr_warning to pr_warn 2014-09-16 10:09:41 +08:00
mach-pcm043.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
mach-qong.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-scb9328.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-vf610.c ARM vf610: add compatibilty strings of supported Vybrid SoC's 2015-01-05 20:53:05 +08:00
mach-vpr200.c ARM: imx/iomux-v3: allow pad_list to be const 2015-03-03 12:04:41 +08:00
Makefile ARM: mx25: Remove static memory mapping 2015-03-13 22:14:57 +08:00
mm-imx1.c ARM: imx: move clk_prepare() out from mxc_restart() 2013-06-17 15:45:10 +08:00
mm-imx3.c Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-07-03 09:46:29 -07:00
mm-imx21.c ARM: imx: move clk_prepare() out from mxc_restart() 2013-06-17 15:45:10 +08:00
mm-imx27.c ARM: imx: move clk_prepare() out from mxc_restart() 2013-06-17 15:45:10 +08:00
mmdc.c ARM: make of_device_ids const 2015-02-19 09:44:25 +01:00
mx1.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx2x.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx3x.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx21.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx27.h ARM: i.MX27: Typo fix 2013-07-15 08:28:07 +08:00
mx31.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx31lilly-db.c ARM: imx: remove IRQF_DISABLED 2013-10-21 09:11:05 +08:00
mx31lite-db.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx31moboard-devboard.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx31moboard-marxbot.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx31moboard-smartbot.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx35.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mxc.h ARM: imx: replace cpu type check with ddr type check 2014-11-23 14:56:17 +08:00
pcm037.h ARM: imx: use machine specific hook for late init 2012-05-08 20:36:16 +08:00
platsmp.c ARM: imx: Add Freescale LS1021A SMP support 2014-11-23 14:56:21 +08:00
pm-imx3.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
pm-imx5.c ARM: imx5: use dynamic mapping for Cortex and GPC block 2014-07-18 16:10:09 +08:00
pm-imx6.c ARM: imx6: convert GPC to stacked domains 2015-03-30 16:42:15 +08:00
pm-imx27.c ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
src.c ARM: imx: remove imx_src_prepare_restart() call 2013-11-11 22:58:43 +08:00
ssi-fiq-ksym.c ARM: imx: merge plat-mxc into mach-imx 2012-10-15 10:02:19 +08:00
ssi-fiq.S ARM: imx: merge plat-mxc into mach-imx 2012-10-15 10:02:19 +08:00
suspend-imx6.S ARM: imx: replace cpu type check with ddr type check 2014-11-23 14:56:17 +08:00
system.c ARM: imx: clean up machine mxc_arch_reset_init_dt reset init 2014-11-22 07:39:36 +08:00
time.c ARM: imx: source gpt per clk from OSC for system timer 2014-09-16 10:09:41 +08:00
tzic.c ARM: imx: tzic: Convert to handle_domain_irq 2014-09-03 13:10:57 +00:00
ulpi.h ARM: imx: Remove mxc specific ulpi access ops 2013-06-17 15:45:16 +08:00