[14/22] ARM: omap1: use pci_ioremap_io() for omap_cf

Message ID 20190808212234.2213262-15-arnd@arndb.de
State New
Headers show
Series
  • ARM: omap1 multiplatform support
Related show

Commit Message

Arnd Bergmann Aug. 8, 2019, 9:22 p.m.
The ISA I/O space handling in omap_cf is incompatible with
PCI drivers in a multiplatform kernel, and requires a custom
mach/io.h.

Change the driver to use pci_ioremap_io() like PCI drivers do,
so the generic ioport access can work across platforms.

To actually use that code, we have to select CONFIG_PCI
here.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
 arch/arm/Kconfig                      |  2 +-
 arch/arm/mach-omap1/include/mach/io.h | 45 ---------------------------
 drivers/pcmcia/omap_cf.c              |  9 ++----
 3 files changed, 4 insertions(+), 52 deletions(-)
 delete mode 100644 arch/arm/mach-omap1/include/mach/io.h

-- 
2.20.0

Comments

Tony Lindgren Aug. 13, 2019, 10:36 a.m. | #1
Hi,

* Arnd Bergmann <arnd@arndb.de> [190808 21:34]:
> The ISA I/O space handling in omap_cf is incompatible with

> PCI drivers in a multiplatform kernel, and requires a custom

> mach/io.h.

> 

> Change the driver to use pci_ioremap_io() like PCI drivers do,

> so the generic ioport access can work across platforms.

> 

> To actually use that code, we have to select CONFIG_PCI

> here.

> 

> Signed-off-by: Arnd Bergmann <arnd@arndb.de>


Looks like this series boots for me on 5912osk up to this
patch, but this patch breaks booting somehow.

Any ideas for fixes?

Regards,

Tony

> ---

>  arch/arm/Kconfig                      |  2 +-

>  arch/arm/mach-omap1/include/mach/io.h | 45 ---------------------------

>  drivers/pcmcia/omap_cf.c              |  9 ++----

>  3 files changed, 4 insertions(+), 52 deletions(-)

>  delete mode 100644 arch/arm/mach-omap1/include/mach/io.h

> 

> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig

> index b7162ac8d756..8263fe7a5e64 100644

> --- a/arch/arm/Kconfig

> +++ b/arch/arm/Kconfig

> @@ -496,13 +496,13 @@ config ARCH_OMAP1

>  	select ARCH_OMAP

>  	select CLKDEV_LOOKUP

>  	select CLKSRC_MMIO

> +	select FORCE_PCI if PCCARD

>  	select GENERIC_CLOCKEVENTS

>  	select GENERIC_IRQ_CHIP

>  	select GENERIC_IRQ_MULTI_HANDLER

>  	select GPIOLIB

>  	select HAVE_IDE

>  	select IRQ_DOMAIN

> -	select NEED_MACH_IO_H if PCCARD

>  	select NEED_MACH_MEMORY_H

>  	select SPARSE_IRQ

>  	help

> diff --git a/arch/arm/mach-omap1/include/mach/io.h b/arch/arm/mach-omap1/include/mach/io.h

> deleted file mode 100644

> index ce4f8005b26f..000000000000

> --- a/arch/arm/mach-omap1/include/mach/io.h

> +++ /dev/null

> @@ -1,45 +0,0 @@

> -/*

> - * arch/arm/mach-omap1/include/mach/io.h

> - *

> - * IO definitions for TI OMAP processors and boards

> - *

> - * Copied from arch/arm/mach-sa1100/include/mach/io.h

> - * Copyright (C) 1997-1999 Russell King

> - *

> - * This program is free software; you can redistribute it and/or modify it

> - * under the terms of the GNU General Public License as published by the

> - * Free Software Foundation; either version 2 of the License, or (at your

> - * option) any later version.

> - *

> - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED

> - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

> - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN

> - * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

> - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

> - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

> - * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

> - * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

> - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

> - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

> - *

> - * You should have received a copy of the GNU General Public License along

> - * with this program; if not, write to the Free Software Foundation, Inc.,

> - * 675 Mass Ave, Cambridge, MA 02139, USA.

> - *

> - * Modifications:

> - *  06-12-1997	RMK	Created.

> - *  07-04-1999	RMK	Major cleanup

> - */

> -

> -#ifndef __ASM_ARM_ARCH_IO_H

> -#define __ASM_ARM_ARCH_IO_H

> -

> -#define IO_SPACE_LIMIT 0xffffffff

> -

> -/*

> - * We don't actually have real ISA nor PCI buses, but there is so many

> - * drivers out there that might just work if we fake them...

> - */

> -#define __io(a)		__typesafe_io(a)

> -

> -#endif

> diff --git a/drivers/pcmcia/omap_cf.c b/drivers/pcmcia/omap_cf.c

> index 98df6473034d..9f8ad82f5fce 100644

> --- a/drivers/pcmcia/omap_cf.c

> +++ b/drivers/pcmcia/omap_cf.c

> @@ -235,9 +235,9 @@ static int __init omap_cf_probe(struct platform_device *pdev)

>  	cf->phys_cf = res->start;

>  

>  	/* pcmcia layer only remaps "real" memory */

> -	cf->socket.io_offset = (unsigned long)

> -			ioremap(cf->phys_cf + SZ_4K, SZ_2K);

> -	if (!cf->socket.io_offset)

> +	cf->socket.io_offset = 0x10000;

> +	status = pci_ioremap_io(cf->socket.io_offset, cf->phys_cf + SZ_4K);

> +	if (status)

>  		goto fail1;

>  

>  	if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))

> @@ -281,8 +281,6 @@ static int __init omap_cf_probe(struct platform_device *pdev)

>  fail2:

>  	release_mem_region(cf->phys_cf, SZ_8K);

>  fail1:

> -	if (cf->socket.io_offset)

> -		iounmap((void __iomem *) cf->socket.io_offset);

>  	free_irq(irq, cf);

>  fail0:

>  	kfree(cf);

> @@ -296,7 +294,6 @@ static int __exit omap_cf_remove(struct platform_device *pdev)

>  	cf->active = 0;

>  	pcmcia_unregister_socket(&cf->socket);

>  	del_timer_sync(&cf->timer);

> -	iounmap((void __iomem *) cf->socket.io_offset);

>  	release_mem_region(cf->phys_cf, SZ_8K);

>  	free_irq(cf->irq, cf);

>  	kfree(cf);

> -- 

> 2.20.0

>
Aaro Koskinen Aug. 13, 2019, 6:11 p.m. | #2
Hi,

On Tue, Aug 13, 2019 at 01:02:16PM +0200, Arnd Bergmann wrote:
> On Tue, Aug 13, 2019 at 12:36 PM Tony Lindgren <tony@atomide.com> wrote:

> > * Arnd Bergmann <arnd@arndb.de> [190808 21:34]:

> > > The ISA I/O space handling in omap_cf is incompatible with

> > > PCI drivers in a multiplatform kernel, and requires a custom

> > > mach/io.h.

> > >

> > > Change the driver to use pci_ioremap_io() like PCI drivers do,

> > > so the generic ioport access can work across platforms.

> > >

> > > To actually use that code, we have to select CONFIG_PCI

> > > here.

> > >

> > > Signed-off-by: Arnd Bergmann <arnd@arndb.de>

> >

> > Looks like this series boots for me on 5912osk up to this

> > patch

> 

> Ok, that's something. Thanks for testing!

> 

> >, but this patch breaks booting somehow.

> >

> > Any ideas for fixes?

> 

> I can think of multiple possible issues:

> 

> - I force CONFIG_PCI to be enabled here in order to keep the

>   asm/io.h logic unchanged. If PCI support in itself is an issue,

>   then turning on CONFIG_PCI without the rest of this patch

>   should also break.


The board dies early, probably in pci_reserve_io():

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.3.0-rc4-osk-los_80efa+-00028-g09f6f22a63e9 (aaro@amd-fx-6350) (gcc version 8.3.0 (GCC)) #1 Tue Aug 13 20:50:11 EEST 2019
[    0.000000] CPU: ARM926EJ-S [41069263] revision 3 (ARMv5TEJ), cr=0005317f
[    0.000000] CPU: VIVT data cache, VIVT instruction cache
[    0.000000] Machine: TI-OSK
[    0.000000] Ignoring tag cmdline (using the default kernel command line)
[    0.000000] printk: bootconsole [earlycon0] enabled
[    0.000000] Memory policy: Data cache writeback
[    0.000000] Internal error: Oops - undefined instruction: 0 [#1] ARM
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.3.0-rc4-osk-los_80efa+-00028-g09f6f22a63e9 #1
[    0.000000] Hardware name: TI-OSK
[    0.000000] PC is at vm_area_add_early+0x1c/0x74
[    0.000000] LR is at 0x200000
[    0.000000] pc : [<c0419310>]    lr : [<00200000>]    psr: 800000d3
[    0.000000] sp : c05b5f14  ip : ff000000  fp : c05bad68
[    0.000000] r10: fefb0000  r9 : ffe00000  r8 : 001fffff
[    0.000000] r7 : c05bad88  r6 : c05db3d4  r5 : c05ca678  r4 : c1ffcf60
[    0.000000] r3 : c1ffcfd8  r2 : c1ffcfb0  r1 : fefb0000  r0 : c1ffcf60
[    0.000000] Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32  ISA ARM  Segment none
[    0.000000] Control: 0005317f  Table: 10004000  DAC: 00000053
[    0.000000] Process swapper (pid: 0, stack limit = 0x(ptrval))
[    0.000000] Stack: (0xc05b5f14 to 0xc05b6000)
[    0.000000] 5f00:                                              c0411724 ff000000 c041260c
[    0.000000] 5f20: 00010000 00010600 c0428794 c05b7008 c042b000 00600000 00000000 ffff1000
[    0.000000] 5f40: 00011fff 00001000 00000007 00000000 00000000 c0428794 c0008000 c060ba7c
[    0.000000] 5f60: c0429a38 c05b5fc4 c05ca818 00053177 00000001 c04101fc 0000006c 0005317f
[    0.000000] 5f80: 00000000 00000000 00000053 00003135 c05b7008 c05b7000 41069263 00053177
[    0.000000] 5fa0: 00000001 c040da10 00000000 00000000 00000000 00000000 00000000 00000000
[    0.000000] 5fc0: 00000000 c0429a38 00000000 00000000 00000000 c040d330 00000053 00003135
[    0.000000] 5fe0: 00000203 10000100 41069263 00053177 00000000 00000000 00000000 00000000
[    0.000000] [<c0419310>] (vm_area_add_early) from [<c0411724>] (add_static_vm_early+0xc/0x5c)
[    0.000000] [<c0411724>] (add_static_vm_early) from [<c041260c>] (paging_init+0x2e0/0x5b4)
[    0.000000] [<c041260c>] (paging_init) from [<c04101fc>] (setup_arch+0x4c8/0x7cc)
[    0.000000] [<c04101fc>] (setup_arch) from [<c040da10>] (start_kernel+0x58/0x478)
[    0.000000] [<c040da10>] (start_kernel) from [<00000000>] (0x0)
[    0.000000] Code: e3530000 059f2058 05923000 0a000006 (e7f001f2) 
[    0.000000] random: get_random_bytes called from init_oops_id+0x20/0x3c with crng_init=0
[    0.000000] ---[ end trace 0000000000000000 ]---
[    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
[    0.000000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---

A.
Tony Lindgren Aug. 14, 2019, 7:49 a.m. | #3
* Arnd Bergmann <arnd@arndb.de> [190813 19:34]:
> On Tue, Aug 13, 2019 at 8:12 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > On Tue, Aug 13, 2019 at 01:02:16PM +0200, Arnd Bergmann wrote:

> > > On Tue, Aug 13, 2019 at 12:36 PM Tony Lindgren <tony@atomide.com> wrote:

> >

> > > - I force CONFIG_PCI to be enabled here in order to keep the

> > >   asm/io.h logic unchanged. If PCI support in itself is an issue,

> > >   then turning on CONFIG_PCI without the rest of this patch

> > >   should also break.

> >

> > The board dies early, probably in pci_reserve_io():

> >

> > Starting kernel ...

> >

> > [    0.000000] Booting Linux on physical CPU 0x0

> > [    0.000000] Linux version 5.3.0-rc4-osk-los_80efa+-00028-g09f6f22a63e9 (aaro@amd-fx-6350) (gcc version 8.3.0 (GCC)) #1 Tue Aug 13 20:50:11 EEST 2019

> > [    0.000000] CPU: ARM926EJ-S [41069263] revision 3 (ARMv5TEJ), cr=0005317f

> > [    0.000000] CPU: VIVT data cache, VIVT instruction cache

> > [    0.000000] Machine: TI-OSK

> > [    0.000000] Ignoring tag cmdline (using the default kernel command line)

> > [    0.000000] printk: bootconsole [earlycon0] enabled

> > [    0.000000] Memory policy: Data cache writeback

> > [    0.000000] Internal error: Oops - undefined instruction: 0 [#1] ARM

> > [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 5.3.0-rc4-osk-los_80efa+-00028-g09f6f22a63e9 #1

> > [    0.000000] Hardware name: TI-OSK

> > [    0.000000] PC is at vm_area_add_early+0x1c/0x74

> 

> That sounds like an address conflict in the virtual addres space.

> 

> In multiplatform kernels, PCI I/O space is hardwired to addresses

> 0xfee00000-0xfeffffff,

> which happened to be available on all the other machines that needed it so far.

> 

> OMAP1_IO_VIRT is 0xfefb0000-0xfefeffff, which clearly overlaps with the end of

> the PCI I/O area.

> 

> We only really need 4KB of I/O space rather than the full 2MB, but it

> would also be

> good not to make this too machine specific.

> 

> Could we change OMAP1_IO_OFFSET to stay out of that area? Something like

> 

> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug

> index 97c114c1ef80..3b66d203dc98 100644

> --- a/arch/arm/Kconfig.debug

> +++ b/arch/arm/Kconfig.debug

> @@ -1794,9 +1794,9 @@ config DEBUG_UART_VIRT

>         default 0xfef00000 if ARCH_IXP4XX && !CPU_BIG_ENDIAN

>         default 0xfef00003 if ARCH_IXP4XX && CPU_BIG_ENDIAN

>         default 0xfef36000 if DEBUG_HIGHBANK_UART

> -       default 0xfefb0000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1

> -       default 0xfefb0800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2

> -       default 0xfefb9800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3

> +       default 0xff000000 if DEBUG_OMAP1UART1 || DEBUG_OMAP7XXUART1

> +       default 0xff000800 if DEBUG_OMAP1UART2 || DEBUG_OMAP7XXUART2

> +       default 0xff009800 if DEBUG_OMAP1UART3 || DEBUG_OMAP7XXUART3

>         default 0xff003000 if DEBUG_U300_UART

>         default 0xffd01000 if DEBUG_HIP01_UART

>         default DEBUG_UART_PHYS if !MMU

> diff --git a/arch/arm/mach-omap1/hardware.h b/arch/arm/mach-omap1/hardware.h

> index 232b8deef907..9fc76a3c9e57 100644

> --- a/arch/arm/mach-omap1/hardware.h

> +++ b/arch/arm/mach-omap1/hardware.h

> @@ -61,7 +61,7 @@ static inline u32 omap_cs3_phys(void)

> 

>  #endif /* ifndef __ASSEMBLER__ */

> 

> -#define OMAP1_IO_OFFSET                0x01000000      /* Virtual IO

> = 0xfefb0000 */

> +#define OMAP1_IO_OFFSET                0x00fb0000      /* Virtual IO

> = 0xff000000 */

>  #define OMAP1_IO_ADDRESS(pa)   IOMEM((pa) - OMAP1_IO_OFFSET)

> 

>  #include "serial.h"


Oh OK yeah sounds like that's the issue.

> There may be additional locations that hardcode the virtual address.


Those should be in mach-omap1/io.c, and I recall innovator had some
hardcoded fpga address that should also be checked.

Regards,

Tony
Arnd Bergmann Aug. 14, 2019, 10:36 a.m. | #4
On Wed, Aug 14, 2019 at 9:49 AM Tony Lindgren <tony@atomide.com> wrote:
> * Arnd Bergmann <arnd@arndb.de> [190813 19:34]:

> > On Tue, Aug 13, 2019 at 8:12 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > diff --git a/arch/arm/mach-omap1/hardware.h b/arch/arm/mach-omap1/hardware.h

> > index 232b8deef907..9fc76a3c9e57 100644

> > --- a/arch/arm/mach-omap1/hardware.h

> > +++ b/arch/arm/mach-omap1/hardware.h

> > @@ -61,7 +61,7 @@ static inline u32 omap_cs3_phys(void)

> >

> >  #endif /* ifndef __ASSEMBLER__ */

> >

> > -#define OMAP1_IO_OFFSET                0x01000000      /* Virtual IO

> > = 0xfefb0000 */

> > +#define OMAP1_IO_OFFSET                0x00fb0000      /* Virtual IO

> > = 0xff000000 */

> >  #define OMAP1_IO_ADDRESS(pa)   IOMEM((pa) - OMAP1_IO_OFFSET)

> >

> >  #include "serial.h"

>

> Oh OK yeah sounds like that's the issue.

>

> > There may be additional locations that hardcode the virtual address.

>

> Those should be in mach-omap1/io.c, and I recall innovator had some

> hardcoded fpga address that should also be checked.


I see four boards with hardcoded I/O addresses, but they are all below
the PCI I/O virtual address range, and are not affected by that change.

For the innovator FPGA access, this was ok, it uses the correct address
in the OMAP1_IO_OFFSET range.

        Arnd
Tony Lindgren Aug. 14, 2019, 1:40 p.m. | #5
* Arnd Bergmann <arnd@arndb.de> [190814 10:37]:
> On Wed, Aug 14, 2019 at 9:49 AM Tony Lindgren <tony@atomide.com> wrote:

> > * Arnd Bergmann <arnd@arndb.de> [190813 19:34]:

> > > On Tue, Aug 13, 2019 at 8:12 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > > diff --git a/arch/arm/mach-omap1/hardware.h b/arch/arm/mach-omap1/hardware.h

> > > index 232b8deef907..9fc76a3c9e57 100644

> > > --- a/arch/arm/mach-omap1/hardware.h

> > > +++ b/arch/arm/mach-omap1/hardware.h

> > > @@ -61,7 +61,7 @@ static inline u32 omap_cs3_phys(void)

> > >

> > >  #endif /* ifndef __ASSEMBLER__ */

> > >

> > > -#define OMAP1_IO_OFFSET                0x01000000      /* Virtual IO

> > > = 0xfefb0000 */

> > > +#define OMAP1_IO_OFFSET                0x00fb0000      /* Virtual IO

> > > = 0xff000000 */

> > >  #define OMAP1_IO_ADDRESS(pa)   IOMEM((pa) - OMAP1_IO_OFFSET)

> > >

> > >  #include "serial.h"

> >

> > Oh OK yeah sounds like that's the issue.

> >

> > > There may be additional locations that hardcode the virtual address.

> >

> > Those should be in mach-omap1/io.c, and I recall innovator had some

> > hardcoded fpga address that should also be checked.

> 

> I see four boards with hardcoded I/O addresses, but they are all below

> the PCI I/O virtual address range, and are not affected by that change.

> 

> For the innovator FPGA access, this was ok, it uses the correct address

> in the OMAP1_IO_OFFSET range.


OK thanks for checking. I tried to apply your virtual address patch to
test boot it, but could not get it to apply. What tree is it against?

Regards,

Tony
Aaro Koskinen Aug. 16, 2019, 8:34 a.m. | #6
Hi,

On Wed, Aug 14, 2019 at 12:36:40PM +0200, Arnd Bergmann wrote:
> On Wed, Aug 14, 2019 at 9:49 AM Tony Lindgren <tony@atomide.com> wrote:

> > * Arnd Bergmann <arnd@arndb.de> [190813 19:34]:

> > > -#define OMAP1_IO_OFFSET                0x01000000      /* Virtual IO

> > > = 0xfefb0000 */

> > > +#define OMAP1_IO_OFFSET                0x00fb0000      /* Virtual IO

> > > = 0xff000000 */

> > >  #define OMAP1_IO_ADDRESS(pa)   IOMEM((pa) - OMAP1_IO_OFFSET)

> >

> > Oh OK yeah sounds like that's the issue.

> >

> > > There may be additional locations that hardcode the virtual address.

> >

> > Those should be in mach-omap1/io.c, and I recall innovator had some

> > hardcoded fpga address that should also be checked.

> 

> I see four boards with hardcoded I/O addresses, but they are all below

> the PCI I/O virtual address range, and are not affected by that change.

> 

> For the innovator FPGA access, this was ok, it uses the correct address

> in the OMAP1_IO_OFFSET range.


I tried testing this on OSK board. If I boot with earlyprintk disabled,
it boots OK and everything works (also CF card) with your playground
commit 5723b6686943.

However with earlyprintk it seems to hang as soon as kernel tries to print
something. So something goes wrong with early DEBUG_LL mapping code when
CONFIG_DEBUG_UART_VIRT=0xff000000 is used?

A.
Aaro Koskinen Aug. 27, 2019, 7:04 p.m. | #7
Hi,

On Tue, Aug 27, 2019 at 06:33:01PM +0200, Arnd Bergmann wrote:
> On Fri, Aug 16, 2019 at 10:34 AM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > On Wed, Aug 14, 2019 at 12:36:40PM +0200, Arnd Bergmann wrote:

> > > On Wed, Aug 14, 2019 at 9:49 AM Tony Lindgren <tony@atomide.com> wrote:

> > > > * Arnd Bergmann <arnd@arndb.de> [190813 19:34]:

> > > > > -#define OMAP1_IO_OFFSET                0x01000000      /* Virtual IO

> > > > > = 0xfefb0000 */

> > > > > +#define OMAP1_IO_OFFSET                0x00fb0000      /* Virtual IO

> > > > > = 0xff000000 */

> > > > >  #define OMAP1_IO_ADDRESS(pa)   IOMEM((pa) - OMAP1_IO_OFFSET)

> > > >

> > > > Oh OK yeah sounds like that's the issue.

> > > >

> > > > > There may be additional locations that hardcode the virtual address.

> > > >

> > > > Those should be in mach-omap1/io.c, and I recall innovator had some

> > > > hardcoded fpga address that should also be checked.

> > >

> > > I see four boards with hardcoded I/O addresses, but they are all below

> > > the PCI I/O virtual address range, and are not affected by that change.

> > >

> > > For the innovator FPGA access, this was ok, it uses the correct address

> > > in the OMAP1_IO_OFFSET range.

> >

> > I tried testing this on OSK board. If I boot with earlyprintk disabled,

> > it boots OK and everything works (also CF card) with your playground

> > commit 5723b6686943.

> >

> > However with earlyprintk it seems to hang as soon as kernel tries to print

> > something. So something goes wrong with early DEBUG_LL mapping code when

> > CONFIG_DEBUG_UART_VIRT=0xff000000 is used?

> 

> I just redid the calculation and came out with the same address, so I

> don't think I put the wrong one there. The address also does not

> conflict with the PCI mapping, and the address is the same one that

> is installed later, so that should also be fine.

> 

> Are you sure you used the correct address in the .config file? If you

> ran 'make oldconfig', the virtual address would not be changed here

> as I just modify the default for a fresh 'make omap1_defconfig'

> run or similar.


Yes... You should be able to try this out also in QEMU to see the hang:

$ qemu-system-arm -M sx1 -kernel sx1-zImage -nographic

[ Hangs silently, press Ctrl-a c to enter monitor. ]

QEMU 4.1.0 monitor - type 'help' for more information
(qemu) info registers
R00=c0379de1 R01=0000005b R02=00000000 R03=ff000000
R04=00000000 R05=00000031 R06=c038f119 R07=00000000
R08=00000000 R09=c038f50e R10=600001d3 R11=00000001
R12=00000010 R13=c0379de0 R14=c000e07c R15=c000dfcc
PSR=000001d3 ---- A svc32
FPSCR: 00000000

from System.map:
c000df7c T printascii
c000dfe0 T printch

.config below:

#
# Automatically generated file; DO NOT EDIT.
# Linux/arm 5.3.0-rc6 Kernel Configuration
#

#
# Compiler: arm-linux-gnueabi-gcc (GCC) 8.3.0
#
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=80300
CONFIG_CLANG_VERSION=0
CONFIG_CC_CAN_LINK=y
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CC_HAS_WARN_MAYBE_UNINITIALIZED=y
CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_EXTABLE_SORT=y

#
# General setup
#
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_HEADER_TEST is not set
CONFIG_LOCALVERSION="-sx1"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_HAVE_KERNEL_LZ4=y
# CONFIG_KERNEL_GZIP is not set
# CONFIG_KERNEL_LZMA is not set
CONFIG_KERNEL_XZ=y
# CONFIG_KERNEL_LZO is not set
# CONFIG_KERNEL_LZ4 is not set
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
# CONFIG_SYSVIPC is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
# CONFIG_USELIB is not set
CONFIG_HAVE_ARCH_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_IRQ_DOMAIN=y
CONFIG_HANDLE_DOMAIN_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# end of IRQ subsystem

CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
CONFIG_ARCH_CLOCKSOURCE_DATA=y
CONFIG_GENERIC_CLOCKEVENTS=y

#
# Timers subsystem
#
CONFIG_HZ_PERIODIC=y
# CONFIG_NO_HZ_IDLE is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
# end of Timers subsystem

CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

#
# RCU Subsystem
#
CONFIG_TINY_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TINY_SRCU=y
# end of RCU Subsystem

# CONFIG_IKCONFIG is not set
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=14
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13
CONFIG_GENERIC_SCHED_CLOCK=y

#
# Scheduler features
#
# end of Scheduler features

# CONFIG_CGROUPS is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
# CONFIG_INITRAMFS_FORCE is not set
# CONFIG_RD_GZIP is not set
# CONFIG_RD_BZIP2 is not set
# CONFIG_RD_LZMA is not set
CONFIG_RD_XZ=y
# CONFIG_RD_LZO is not set
# CONFIG_RD_LZ4 is not set
# CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_HAVE_UID16=y
CONFIG_EXPERT=y
# CONFIG_MULTIUSER is not set
# CONFIG_SGETMASK_SYSCALL is not set
# CONFIG_SYSFS_SYSCALL is not set
# CONFIG_SYSCTL_SYSCALL is not set
# CONFIG_FHANDLE is not set
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
# CONFIG_BASE_FULL is not set
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set
# CONFIG_TIMERFD is not set
# CONFIG_EVENTFD is not set
# CONFIG_SHMEM is not set
# CONFIG_AIO is not set
CONFIG_IO_URING=y
# CONFIG_ADVISE_SYSCALLS is not set
# CONFIG_MEMBARRIER is not set
# CONFIG_KALLSYMS is not set
# CONFIG_BPF_SYSCALL is not set
# CONFIG_USERFAULTFD is not set
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
# CONFIG_RSEQ is not set
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y
# CONFIG_PC104 is not set

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# end of Kernel Performance Events And Counters

# CONFIG_VM_EVENT_COUNTERS is not set
CONFIG_COMPAT_BRK=y
# CONFIG_SLAB is not set
# CONFIG_SLUB is not set
CONFIG_SLOB=y
CONFIG_SLAB_MERGE_DEFAULT=y
# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
# CONFIG_PROFILING is not set
# end of General setup

CONFIG_ARM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_HAVE_PROC_CPU=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
# CONFIG_ARM_PATCH_PHYS_VIRT is not set
CONFIG_NEED_MACH_MEMORY_H=y
CONFIG_PHYS_OFFSET=0x10000000
CONFIG_GENERIC_BUG=y
CONFIG_PGTABLE_LEVELS=2

#
# System Type
#
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MIN=8
CONFIG_ARCH_MMAP_RND_BITS_MAX=16
# CONFIG_ARCH_MULTIPLATFORM is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_DOVE is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_W90X900 is not set
# CONFIG_ARCH_LPC32XX is not set
# CONFIG_ARCH_PXA is not set
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C24XX is not set
# CONFIG_ARCH_DAVINCI is not set
CONFIG_ARCH_OMAP1=y
CONFIG_ARCH_OMAP=y

#
# TI OMAP Common Features
#

#
# OMAP Feature Selections
#
CONFIG_OMAP_RESET_CLOCKS=y
CONFIG_OMAP_MPU_TIMER=y
CONFIG_OMAP_SERIAL_WAKE=y
# end of TI OMAP Common Features

#
# TI OMAP1 specific features
#

#
# OMAP Core Type
#
# CONFIG_ARCH_OMAP730 is not set
# CONFIG_ARCH_OMAP850 is not set
CONFIG_ARCH_OMAP15XX=y
# CONFIG_ARCH_OMAP16XX is not set
CONFIG_OMAP_MUX=y
CONFIG_OMAP_MUX_DEBUG=y
# CONFIG_OMAP_MUX_WARNINGS is not set

#
# OMAP Board Type
#
# CONFIG_MACH_OMAP_INNOVATOR is not set
# CONFIG_MACH_OMAP_PALMTE is not set
# CONFIG_MACH_OMAP_PALMZ71 is not set
# CONFIG_MACH_OMAP_PALMTT is not set
CONFIG_MACH_SX1=y
# CONFIG_MACH_AMS_DELTA is not set
# CONFIG_MACH_OMAP_GENERIC is not set
# end of TI OMAP1 specific features

#
# Processor Type
#
CONFIG_CPU_ARM925T=y
CONFIG_CPU_THUMB_CAPABLE=y
CONFIG_CPU_32v4T=y
CONFIG_CPU_ABRT_EV4T=y
CONFIG_CPU_PABRT_LEGACY=y
CONFIG_CPU_CACHE_V4WT=y
CONFIG_CPU_CACHE_VIVT=y
CONFIG_CPU_COPY_V4WB=y
CONFIG_CPU_TLB_V4WBI=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y
CONFIG_CPU_USE_DOMAINS=y

#
# Processor Features
#
# CONFIG_ARM_THUMB is not set
# CONFIG_CPU_ICACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_WRITETHROUGH is not set
CONFIG_NEED_KUSER_HELPERS=y
CONFIG_KUSER_HELPERS=y
CONFIG_ARM_L1_CACHE_SHIFT=5
# end of System Type

#
# Bus support
#
# end of Bus support

#
# Kernel Features
#
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_3G_OPT is not set
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_ARCH_NR_GPIO=0
CONFIG_HZ_FIXED=0
CONFIG_HZ_100=y
# CONFIG_HZ_200 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_500 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_AEABI=y
# CONFIG_OABI_COMPAT is not set
CONFIG_ARCH_HAS_HOLES_MEMORYMODEL=y
CONFIG_HAVE_ARCH_PFN_VALID=y
# CONFIG_HIGHMEM is not set
# CONFIG_CPU_SW_DOMAIN_PAN is not set
CONFIG_ARCH_WANT_GENERAL_HUGETLB=y
CONFIG_FORCE_MAX_ZONEORDER=11
CONFIG_ALIGNMENT_TRAP=y
# CONFIG_UACCESS_WITH_MEMCPY is not set
# CONFIG_SECCOMP is not set
# CONFIG_PARAVIRT is not set
# CONFIG_PARAVIRT_TIME_ACCOUNTING is not set
# end of Kernel Features

#
# Boot options
#
# CONFIG_USE_OF is not set
CONFIG_ATAGS=y
# CONFIG_DEPRECATED_PARAM_STRUCT is not set
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE="mem=32M console=ttyS0,115200n8 earlyprintk"
# CONFIG_CMDLINE_FROM_BOOTLOADER is not set
# CONFIG_CMDLINE_EXTEND is not set
CONFIG_CMDLINE_FORCE=y
# CONFIG_XIP_KERNEL is not set
# CONFIG_KEXEC is not set
# CONFIG_CRASH_DUMP is not set
# CONFIG_AUTO_ZRELADDR is not set
# end of Boot options

#
# CPU Power Management
#

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
# end of CPU Frequency scaling

#
# CPU Idle
#
# CONFIG_CPU_IDLE is not set
# end of CPU Idle
# end of CPU Power Management

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
# end of Floating point emulation

#
# Power management options
#
# CONFIG_PM is not set
# CONFIG_APM_EMULATION is not set
# end of Power management options

#
# Firmware Drivers
#
# CONFIG_FIRMWARE_MEMMAP is not set
# CONFIG_FW_CFG_SYSFS is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

# CONFIG_VIRTUALIZATION is not set

#
# General architecture-dependent options
#
CONFIG_HAVE_OPROFILE=y
# CONFIG_JUMP_LABEL is not set
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_CONTIGUOUS=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_GENERIC_IDLE_POLL_SETUP=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_KEEPINITRD=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_HAVE_ARCH_THREAD_STRUCT_WHITELIST=y
CONFIG_ARCH_32BIT_OFF_T=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
# CONFIG_STACKPROTECTOR is not set
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_REL=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_HAVE_EXIT_THREAD=y
CONFIG_ARCH_MMAP_RND_BITS=8
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND3=y
CONFIG_OLD_SIGACTION=y
CONFIG_64BIT_TIME=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_CPU_NO_EFFICIENT_FFS=y
CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
# CONFIG_STRICT_KERNEL_RWX is not set
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_ARCH_HAS_PHYS_TO_DMA=y
CONFIG_REFCOUNT_FULL=y

#
# GCOV-based kernel profiling
#
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling

CONFIG_PLUGIN_HOSTCC="g++"
CONFIG_HAVE_GCC_PLUGINS=y
CONFIG_GCC_PLUGINS=y

#
# GCC plugins
#
# CONFIG_GCC_PLUGIN_CYC_COMPLEXITY is not set
# CONFIG_GCC_PLUGIN_LATENT_ENTROPY is not set
# CONFIG_GCC_PLUGIN_RANDSTRUCT is not set
# end of GCC plugins
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=1
# CONFIG_MODULES is not set
CONFIG_BLOCK=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_SED_OPAL is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
# CONFIG_EFI_PARTITION is not set
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
# end of Partition Types

#
# IO Schedulers
#
# CONFIG_MQ_IOSCHED_DEADLINE is not set
# CONFIG_MQ_IOSCHED_KYBER is not set
CONFIG_IOSCHED_BFQ=y
# end of IO Schedulers

CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
# CONFIG_BINFMT_ELF_FDPIC is not set
CONFIG_ELFCORE=y
CONFIG_BINFMT_SCRIPT=y
CONFIG_ARCH_HAS_BINFMT_FLAT=y
# CONFIG_BINFMT_FLAT is not set
CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK=y
# CONFIG_BINFMT_MISC is not set
# CONFIG_COREDUMP is not set
# end of Executable file formats

#
# Memory Management options
#
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_ARCH_KEEP_MEMBLOCK=y
CONFIG_SPLIT_PTLOCK_CPUS=999999
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CLEANCACHE is not set
# CONFIG_FRONTSWAP is not set
# CONFIG_CMA is not set
# CONFIG_ZPOOL is not set
# CONFIG_ZBUD is not set
# CONFIG_ZSMALLOC is not set
CONFIG_GENERIC_EARLY_IOREMAP=y
# CONFIG_IDLE_PAGE_TRACKING is not set
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_BENCHMARK is not set
# end of Memory Management options

# CONFIG_NET is not set
CONFIG_HAVE_EBPF_JIT=y

#
# Device Drivers
#
# CONFIG_PCCARD is not set

#
# Generic Driver Options
#
# CONFIG_UEVENT_HELPER is not set
CONFIG_DEVTMPFS=y
# CONFIG_DEVTMPFS_MOUNT is not set
CONFIG_STANDALONE=y
# CONFIG_PREVENT_FIRMWARE_BUILD is not set

#
# Firmware loader
#
# CONFIG_FW_LOADER is not set
# end of Firmware loader

# CONFIG_ALLOW_DEV_COREDUMP is not set
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=y
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_BRCMSTB_GISB_ARB is not set
# end of Bus devices

# CONFIG_GNSS is not set
# CONFIG_MTD is not set
# CONFIG_OF is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
# CONFIG_BLK_DEV is not set

#
# NVME Support
#
# CONFIG_NVME_FC is not set
# end of NVME Support

#
# Misc devices
#
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_SRAM is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# end of EEPROM support

#
# Texas Instruments shared transport line discipline
#
# end of Texas Instruments shared transport line discipline

# CONFIG_ALTERA_STAPL is not set

#
# Intel MIC & related support
#

#
# Intel MIC Bus Driver
#

#
# SCIF Bus Driver
#

#
# VOP Bus Driver
#
# CONFIG_VOP_BUS is not set

#
# Intel MIC Host Driver
#

#
# Intel MIC Card Driver
#

#
# SCIF Driver
#

#
# Intel MIC Coprocessor State Management (COSM) Drivers
#

#
# VOP Driver
#
# end of Intel MIC & related support

# CONFIG_ECHO is not set
# end of Misc devices

CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# end of SCSI device support

# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_NVM is not set

#
# Input device support
#
# CONFIG_INPUT is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
# CONFIG_VT is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_TRACE_SINK is not set
# CONFIG_NULL_TTY is not set
CONFIG_LDISC_AUTOLOAD=y
# CONFIG_DEVMEM is not set
# CONFIG_DEVKMEM is not set

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_NR_UARTS=3
CONFIG_SERIAL_8250_RUNTIME_UARTS=3
# CONFIG_SERIAL_8250_EXTENDED is not set
CONFIG_SERIAL_8250_FSL=y
# CONFIG_SERIAL_8250_DW is not set
# CONFIG_SERIAL_8250_EM is not set
# CONFIG_SERIAL_8250_RT288X is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_EARLYCON_ARM_SEMIHOST is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_BCM63XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_ST_ASC is not set
# end of Serial drivers

CONFIG_SERIAL_MCTRL_GPIO=y
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_HVC_DCC is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
# end of Character devices

#
# I2C support
#
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=y
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
# CONFIG_I2C_DESIGNWARE_PLATFORM is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
# CONFIG_I2C_OCORES is not set
CONFIG_I2C_OMAP=y
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set

#
# Other I2C/SMBus bus drivers
#
# end of I2C Hardware Bus support

# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# end of I2C support

# CONFIG_I3C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
# CONFIG_PPS is not set

#
# PTP clock support
#

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# end of PTP clock support

# CONFIG_PINCTRL is not set
CONFIG_ARCH_HAVE_CUSTOM_GPIO_H=y
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_GPIOLIB_IRQCHIP=y
# CONFIG_DEBUG_GPIO is not set
# CONFIG_GPIO_SYSFS is not set

#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_MPC8XXX is not set
CONFIG_GPIO_OMAP=y
# CONFIG_GPIO_XILINX is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers

#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set
# end of I2C GPIO expanders

#
# MFD GPIO expanders
#
# CONFIG_HTC_EGPIO is not set
# end of MFD GPIO expanders

# CONFIG_GPIO_MOCKUP is not set
# CONFIG_W1 is not set
# CONFIG_POWER_AVS is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_AS3711 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_CROS_EC is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_MFD_ASIC3 is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_PM8XXX is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_SEC_CORE is not set
# CONFIG_MFD_SI476X_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SKY81452 is not set
# CONFIG_MFD_SMSC is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_T7L66XB is not set
# CONFIG_MFD_TC6387XB is not set
# CONFIG_MFD_TC6393XB is not set
# CONFIG_MFD_TQMX86 is not set
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_DRM is not set
# CONFIG_DRM_DP_CEC is not set

#
# ARM devices
#
# end of ARM devices

#
# ACP (Audio CoProcessor) Configuration
#
# end of ACP (Audio CoProcessor) Configuration

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
# CONFIG_LCD_CLASS_DEVICE is not set
# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
# end of Backlight & LCD device support
# end of Graphics support

# CONFIG_SOUND is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_SUPPORT is not set
# CONFIG_UWB is not set
CONFIG_MMC=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_MINORS=8
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_SDHCI is not set
CONFIG_MMC_OMAP=y
# CONFIG_MMC_DW is not set
# CONFIG_MMC_USDHI6ROL0 is not set
# CONFIG_MMC_CQHCI is not set
# CONFIG_MMC_MTK is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_SYSTOHC is not set
# CONFIG_RTC_DEBUG is not set
# CONFIG_RTC_NVMEM is not set

#
# RTC interfaces
#
# CONFIG_RTC_INTF_SYSFS is not set
# CONFIG_RTC_INTF_PROC is not set
# CONFIG_RTC_INTF_DEV is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABEOZ9 is not set
# CONFIG_RTC_DRV_ABX80X is not set
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8523 is not set
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BD70528 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8010 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3028 is not set
# CONFIG_RTC_DRV_RV8803 is not set
# CONFIG_RTC_DRV_SD3078 is not set

#
# SPI RTC drivers
#
CONFIG_RTC_I2C_AND_SPI=y

#
# SPI and I2C RTC drivers
#
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_PCF2127 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_DS2404 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_FTRTC010 is not set

#
# HID Sensor RTC drivers
#
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y
CONFIG_DMA_VIRTUAL_CHANNELS=y
# CONFIG_ALTERA_MSGDMA is not set
# CONFIG_FSL_QDMA is not set
# CONFIG_INTEL_IDMA64 is not set
# CONFIG_NBPFAXI_DMA is not set
# CONFIG_QCOM_HIDMA_MGMT is not set
# CONFIG_QCOM_HIDMA is not set
# CONFIG_DW_DMAC is not set
# CONFIG_TI_CPPI41 is not set
# CONFIG_TI_EDMA is not set
CONFIG_DMA_OMAP=y

#
# DMA Clients
#
# CONFIG_ASYNC_TX_DMA is not set
# CONFIG_DMATEST is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# end of DMABUF options

# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_VIRTIO_MENU is not set

#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support

# CONFIG_STAGING is not set
# CONFIG_GOLDFISH is not set
# CONFIG_CHROME_PLATFORMS is not set
# CONFIG_MELLANOX_PLATFORM is not set
CONFIG_CLKDEV_LOOKUP=y
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
CONFIG_CLKSRC_MMIO=y
# end of Clock Source drivers

# CONFIG_MAILBOX is not set
# CONFIG_IOMMU_SUPPORT is not set

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Aspeed SoC drivers
#
# end of Aspeed SoC drivers

#
# Broadcom SoC drivers
#
# CONFIG_SOC_BRCMSTB is not set
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# IXP4xx SoC drivers
#
# CONFIG_IXP4XX_QMGR is not set
# CONFIG_IXP4XX_NPE is not set
# end of IXP4xx SoC drivers

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# CONFIG_XILINX_VCU is not set
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# end of PHY Subsystem

# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
# CONFIG_RAS is not set

#
# Android
#
# CONFIG_ANDROID is not set
# end of Android

# CONFIG_DAX is not set
# CONFIG_NVMEM is not set

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# end of Device Drivers

#
# File systems
#
CONFIG_VALIDATE_FS_PARSER=y
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT3_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY_USER is not set
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set
# end of Caches

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set
# end of CD-ROM/DVD Filesystems

#
# DOS/FAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_NTFS_FS is not set
# end of DOS/FAT/NT Filesystems

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
# CONFIG_CONFIGFS_FS is not set
# end of Pseudo filesystems

# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NLS is not set
# CONFIG_UNICODE is not set
# end of File systems

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITYFS is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="yama,loadpin,safesetid,integrity"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_INIT_STACK_NONE=y
# CONFIG_GCC_PLUGIN_STRUCTLEAK_USER is not set
# CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF is not set
# CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL is not set
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# end of Memory initialization
# end of Kernel hardening options
# end of Security options

# CONFIG_CRYPTO is not set

#
# Library routines
#
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
# CONFIG_CORDIC is not set
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_XZ=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_DMA_DECLARE_COHERENT=y
CONFIG_ARCH_HAS_SETUP_DMA_OPS=y
CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS=y
CONFIG_DMA_REMAP=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_IRQ_POLL is not set
# CONFIG_DIMLIB is not set
CONFIG_ARCH_NO_SG_CHAIN=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set
# end of Library routines

#
# Kernel hacking
#

#
# printk and dmesg options
#
CONFIG_PRINTK_TIME=y
# CONFIG_PRINTK_CALLER is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_BOOT_PRINTK_DELAY is not set
# end of printk and dmesg options

#
# Compile-time checks and compiler options
#
# CONFIG_DEBUG_INFO is not set
# CONFIG_ENABLE_MUST_CHECK is not set
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_DEBUG_FS is not set
# CONFIG_HEADERS_INSTALL is not set
# CONFIG_OPTIMIZE_INLINING is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options

# CONFIG_MAGIC_SYSRQ is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_MISC is not set

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_OBJECTS is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_VM is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN_STACK=1
# end of Memory Debugging

CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
# CONFIG_DEBUG_SHIRQ is not set

#
# Debug Lockups and Hangs
#
# CONFIG_SOFTLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_WQ_WATCHDOG is not set
# end of Debug Lockups and Hangs

# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_PANIC_TIMEOUT=0
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_STACKTRACE is not set
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
# CONFIG_RCU_PERF_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging

# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_RUNTIME_TESTING_MENU is not set
# CONFIG_MEMTEST is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_UBSAN is not set
CONFIG_UBSAN_ALIGNMENT=y
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
# CONFIG_ARM_PTDUMP_DEBUGFS is not set
# CONFIG_DEBUG_WX is not set
# CONFIG_UNWINDER_FRAME_POINTER is not set
CONFIG_UNWINDER_ARM=y
CONFIG_ARM_UNWIND=y
# CONFIG_DEBUG_USER is not set
CONFIG_DEBUG_LL=y
CONFIG_DEBUG_OMAP1UART1=y
# CONFIG_DEBUG_OMAP1UART2 is not set
# CONFIG_DEBUG_OMAP1UART3 is not set
# CONFIG_DEBUG_ICEDCC is not set
# CONFIG_DEBUG_SEMIHOSTING is not set
# CONFIG_DEBUG_LL_UART_8250 is not set
# CONFIG_DEBUG_LL_UART_PL01X is not set
CONFIG_DEBUG_LL_INCLUDE="debug/8250.S"
CONFIG_DEBUG_UART_8250=y
CONFIG_DEBUG_UART_PHYS=0xfffb0000
CONFIG_DEBUG_UART_VIRT=0xff000000
CONFIG_DEBUG_UART_8250_SHIFT=2
# CONFIG_DEBUG_UART_8250_WORD is not set
# CONFIG_DEBUG_UART_8250_PALMCHIP is not set
# CONFIG_DEBUG_UART_8250_FLOW_CONTROL is not set
CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h"
CONFIG_EARLY_PRINTK=y
# end of Kernel hacking

A.
Arnd Bergmann Aug. 28, 2019, 1:02 p.m. | #8
On Tue, Aug 27, 2019 at 9:05 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:
> On Tue, Aug 27, 2019 at 06:33:01PM +0200, Arnd Bergmann wrote:

> > On Fri, Aug 16, 2019 at 10:34 AM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > > However with earlyprintk it seems to hang as soon as kernel tries to print

> > > something. So something goes wrong with early DEBUG_LL mapping code when

> > > CONFIG_DEBUG_UART_VIRT=0xff000000 is used?

> >

> > I just redid the calculation and came out with the same address, so I

> > don't think I put the wrong one there. The address also does not

> > conflict with the PCI mapping, and the address is the same one that

> > is installed later, so that should also be fine.

> >

> > Are you sure you used the correct address in the .config file? If you

> > ran 'make oldconfig', the virtual address would not be changed here

> > as I just modify the default for a fresh 'make omap1_defconfig'

> > run or similar.

>

> Yes... You should be able to try this out also in QEMU to see the hang:


Haven't tried yet, but I took a look at the dump:

> $ qemu-system-arm -M sx1 -kernel sx1-zImage -nographic

>

> [ Hangs silently, press Ctrl-a c to enter monitor. ]

>

> QEMU 4.1.0 monitor - type 'help' for more information

> (qemu) info registers

> R00=c0379de1 R01=0000005b R02=00000000 R03=ff000000

> R04=00000000 R05=00000031 R06=c038f119 R07=00000000

> R08=00000000 R09=c038f50e R10=600001d3 R11=00000001

> R12=00000010 R13=c0379de0 R14=c000e07c R15=c000dfcc

> PSR=000001d3 ---- A svc32

> FPSCR: 00000000

>

> from System.map:

> c000df7c T printascii

> c000dfe0 T printch


Ok, that is clearly the "busyloop" macro in
arch/arm/include/debug/8250.S, checking if the data got sent.

The 'r2' register contains zero, so UART_LSR_TEMT and
UART_LSR_THRE are not set, but presumably the mapping
was installed right since you did not get a page fault.

I assume you checked that the uart output wasn't already broken
by one of the earlier patches, right?

Also, looking at arch/arm/mach-omap1/include/mach/uncompress.h
it seems that SX1 normally uses UART3, not UART1.
Is that different in qemu?

        Arnd
Aaro Koskinen Aug. 28, 2019, 6:23 p.m. | #9
Hi,

On Wed, Aug 28, 2019 at 03:02:36PM +0200, Arnd Bergmann wrote:
> On Tue, Aug 27, 2019 at 9:05 PM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > On Tue, Aug 27, 2019 at 06:33:01PM +0200, Arnd Bergmann wrote:

> > > On Fri, Aug 16, 2019 at 10:34 AM Aaro Koskinen <aaro.koskinen@iki.fi> wrote:

> > > > However with earlyprintk it seems to hang as soon as kernel tries to print

> > > > something. So something goes wrong with early DEBUG_LL mapping code when

> > > > CONFIG_DEBUG_UART_VIRT=0xff000000 is used?

> > >

> > > I just redid the calculation and came out with the same address, so I

> > > don't think I put the wrong one there. The address also does not

> > > conflict with the PCI mapping, and the address is the same one that

> > > is installed later, so that should also be fine.

> > >

> > > Are you sure you used the correct address in the .config file? If you

> > > ran 'make oldconfig', the virtual address would not be changed here

> > > as I just modify the default for a fresh 'make omap1_defconfig'

> > > run or similar.

> >

> > Yes... You should be able to try this out also in QEMU to see the hang:

> 

> Haven't tried yet, but I took a look at the dump:

> 

> > $ qemu-system-arm -M sx1 -kernel sx1-zImage -nographic

> >

> > [ Hangs silently, press Ctrl-a c to enter monitor. ]

> >

> > QEMU 4.1.0 monitor - type 'help' for more information

> > (qemu) info registers

> > R00=c0379de1 R01=0000005b R02=00000000 R03=ff000000

> > R04=00000000 R05=00000031 R06=c038f119 R07=00000000

> > R08=00000000 R09=c038f50e R10=600001d3 R11=00000001

> > R12=00000010 R13=c0379de0 R14=c000e07c R15=c000dfcc

> > PSR=000001d3 ---- A svc32

> > FPSCR: 00000000

> >

> > from System.map:

> > c000df7c T printascii

> > c000dfe0 T printch

> 

> Ok, that is clearly the "busyloop" macro in

> arch/arm/include/debug/8250.S, checking if the data got sent.

> 

> The 'r2' register contains zero, so UART_LSR_TEMT and

> UART_LSR_THRE are not set, but presumably the mapping

> was installed right since you did not get a page fault.

> 

> I assume you checked that the uart output wasn't already broken

> by one of the earlier patches, right?


Correct, it's only with the mapping change patch it hangs.

> Also, looking at arch/arm/mach-omap1/include/mach/uncompress.h

> it seems that SX1 normally uses UART3, not UART1.

> Is that different in qemu?


In QEMU all uarts can be used, trying with UART3 as early console
hangs as well. (It prints Uncompressing... done. but I guess that's
done with the physical address.)

A.
Tony Lindgren Aug. 28, 2019, 6:45 p.m. | #10
* Aaro Koskinen <aaro.koskinen@iki.fi> [190828 18:23]:
> On Wed, Aug 28, 2019 at 03:02:36PM +0200, Arnd Bergmann wrote:

> > I assume you checked that the uart output wasn't already broken

> > by one of the earlier patches, right?

> 

> Correct, it's only with the mapping change patch it hangs.

> 

> > Also, looking at arch/arm/mach-omap1/include/mach/uncompress.h

> > it seems that SX1 normally uses UART3, not UART1.

> > Is that different in qemu?

> 

> In QEMU all uarts can be used, trying with UART3 as early console

> hangs as well. (It prints Uncompressing... done. but I guess that's

> done with the physical address.)


Hmm maybe we now need to get rid of the machine based
detection code for DEBUGLL like we did for mach-omap2.

Just get rid of arch_decomp_setup() in mach-omap1
uncompress.h file and make sure the assembly code
only relies on the the Kconfig options only.

That needs to be done at least for device tree based
support since we use a generic machine ID. But maybe
with multiarch support we need to rely on generic
uncompress.h and assembly.

Regards,

Tony

Patch

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b7162ac8d756..8263fe7a5e64 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -496,13 +496,13 @@  config ARCH_OMAP1
 	select ARCH_OMAP
 	select CLKDEV_LOOKUP
 	select CLKSRC_MMIO
+	select FORCE_PCI if PCCARD
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_IRQ_CHIP
 	select GENERIC_IRQ_MULTI_HANDLER
 	select GPIOLIB
 	select HAVE_IDE
 	select IRQ_DOMAIN
-	select NEED_MACH_IO_H if PCCARD
 	select NEED_MACH_MEMORY_H
 	select SPARSE_IRQ
 	help
diff --git a/arch/arm/mach-omap1/include/mach/io.h b/arch/arm/mach-omap1/include/mach/io.h
deleted file mode 100644
index ce4f8005b26f..000000000000
--- a/arch/arm/mach-omap1/include/mach/io.h
+++ /dev/null
@@ -1,45 +0,0 @@ 
-/*
- * arch/arm/mach-omap1/include/mach/io.h
- *
- * IO definitions for TI OMAP processors and boards
- *
- * Copied from arch/arm/mach-sa1100/include/mach/io.h
- * Copyright (C) 1997-1999 Russell King
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Modifications:
- *  06-12-1997	RMK	Created.
- *  07-04-1999	RMK	Major cleanup
- */
-
-#ifndef __ASM_ARM_ARCH_IO_H
-#define __ASM_ARM_ARCH_IO_H
-
-#define IO_SPACE_LIMIT 0xffffffff
-
-/*
- * We don't actually have real ISA nor PCI buses, but there is so many
- * drivers out there that might just work if we fake them...
- */
-#define __io(a)		__typesafe_io(a)
-
-#endif
diff --git a/drivers/pcmcia/omap_cf.c b/drivers/pcmcia/omap_cf.c
index 98df6473034d..9f8ad82f5fce 100644
--- a/drivers/pcmcia/omap_cf.c
+++ b/drivers/pcmcia/omap_cf.c
@@ -235,9 +235,9 @@  static int __init omap_cf_probe(struct platform_device *pdev)
 	cf->phys_cf = res->start;
 
 	/* pcmcia layer only remaps "real" memory */
-	cf->socket.io_offset = (unsigned long)
-			ioremap(cf->phys_cf + SZ_4K, SZ_2K);
-	if (!cf->socket.io_offset)
+	cf->socket.io_offset = 0x10000;
+	status = pci_ioremap_io(cf->socket.io_offset, cf->phys_cf + SZ_4K);
+	if (status)
 		goto fail1;
 
 	if (!request_mem_region(cf->phys_cf, SZ_8K, driver_name))
@@ -281,8 +281,6 @@  static int __init omap_cf_probe(struct platform_device *pdev)
 fail2:
 	release_mem_region(cf->phys_cf, SZ_8K);
 fail1:
-	if (cf->socket.io_offset)
-		iounmap((void __iomem *) cf->socket.io_offset);
 	free_irq(irq, cf);
 fail0:
 	kfree(cf);
@@ -296,7 +294,6 @@  static int __exit omap_cf_remove(struct platform_device *pdev)
 	cf->active = 0;
 	pcmcia_unregister_socket(&cf->socket);
 	del_timer_sync(&cf->timer);
-	iounmap((void __iomem *) cf->socket.io_offset);
 	release_mem_region(cf->phys_cf, SZ_8K);
 	free_irq(cf->irq, cf);
 	kfree(cf);