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 [off-list ref] wrote:

quoted

* Arnd Bergmann [off-list ref] [190808 21:34]:

quoted

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!

quoted

, 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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