Re: [PATCH] sh: Avoid using IRQ0 on SH3 and SH4

[Guenter Roeck]

On 7/8/23 13:52, Sergey Shtylyov wrote:
> On 7/6/23 7:38 PM, John Paul Adrian Glaubitz wrote:
> [...]
>
> > > Which sh4 platforms in particular?
> > >
> > > I booted a kernel with this patch on rts7751r2d (QEMU) and landisk
> > > (physical) two days ago.
> >
> > I gave it a try with the command line Guenter suggested and indeed the kernel locks
> > up right here with the patch applied and boots fine without it:
> >
> > Creating 4 MTD partitions on "physmap-flash":
> > 0x000000000000-0x000000040000 : "U-Boot"
> > 0x000000040000-0x000000080000 : "Environment"
> > 0x000000080000-0x000000240000 : "Kernel"
> > 0x000000240000-0x000001000000 : "Flash_FS"
> > 8139too: 8139too Fast Ethernet driver 0.9.28
> > 8139too 0000:00:01.0: This (id 10ec:8139 rev 20) is an enhanced 8139C+ chip, use 8139cp
> > sm501-usb sm501-usb: SM501 OHCI
> > sm501-usb sm501-usb: new USB bus registered, assigned bus number 1
> > sm501-usb sm501-usb: irq 116, io mem 0x13e40000
>
>     I guess it was irq 100 before my patch. What if you undo the following
> part of my patch?

No, that doesn't help.

Guenter

> Index: linux/arch/sh/include/mach-common/mach/r2d.h
> ===================================================================
> --- linux.orig/arch/sh/include/mach-common/mach/r2d.h
> +++ linux/arch/sh/include/mach-common/mach/r2d.h
> @@ -47,7 +47,7 @@
>   
>   #define IRLCNTR1	(PA_BCR + 0)	/* Interrupt Control Register1 */
>   
> -#define R2D_FPGA_IRQ_BASE	100
> +#define R2D_FPGA_IRQ_BASE	(100 + 16)
>   
>   #define IRQ_VOYAGER		(R2D_FPGA_IRQ_BASE + 0)
>   #define IRQ_EXT			(R2D_FPGA_IRQ_BASE + 1)
>
> > usb usb1: New USB device found, idVendor=1d6b, idProduct=0001, bcdDevice= 6.04
> > usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> > usb usb1: Product: SM501 OHCI
> > usb usb1: Manufacturer: Linux 6.4.0-12069-gc17414a273b8 ohci_hcd
> > usb usb1: SerialNumber: sm501-usb
> > hub 1-0:1.0: USB hub found
> > hub 1-0:1.0: 2 ports detected
> > usbcore: registered new interface driver usb-storage
> > rtc-r9701 spi0.0: cannot read RTC register
> > usbcore: registered new interface driver usbhid
> > usbhid: USB HID core driver
> > NET: Registered PF_PACKET protocol family
> > heartbeat: version 0.1.2 loaded
> > ata1: found unknown device (class 0)
> [...]
>
> > Adrian
>
> MBR, Sergey