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

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