From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from p15137414.pureserver.info (matrixvision.de [217.160.213.229]) by ozlabs.org (Postfix) with ESMTP id 9180FDE4A9 for ; Wed, 30 Apr 2008 02:44:13 +1000 (EST) Received: from pandora.intern.matrix-vision.de (g1.matrix-vision.com [217.7.222.190]) by p15137414.pureserver.info (Postfix) with ESMTP id 455A93CC067 for ; Tue, 29 Apr 2008 18:44:10 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by pandora.intern.matrix-vision.de (Postfix) with ESMTP id C3179E3C09 for ; Tue, 29 Apr 2008 18:41:42 +0200 (CEST) Received: from hegemone (hegemone.intern.matrix-vision.de [192.168.5.77]) by pandora.intern.matrix-vision.de (Postfix) with ESMTP id A9DDCE3C09 for ; Tue, 29 Apr 2008 18:41:42 +0200 (CEST) Received: from [192.168.65.5] (unknown [192.168.65.5]) by hegemone (Postfix) with ESMTP id D34CF536 for ; Tue, 29 Apr 2008 18:44:09 +0200 (CEST) Message-ID: <48175059.9080001@matrix-vision.de> Date: Tue, 29 Apr 2008 18:44:09 +0200 From: Andre Schwarz MIME-Version: 1.0 To: linux-ppc list Subject: EXT_IRQ0 @ MPC834x Content-Type: text/plain; charset=ISO-8859-15 List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , All, actually I'm having trouble getting the IRQ0 work on a MPC8343 with 2.6.25-rc8. There's an external PCI device connected to it .... Regarding to the manual IRQ0 is somewhat special and has Vector 48 assigned. Therefore my dts entry for this device looks like : interrupt-map = <0x5800 0 0 1 &ipic 0x30 0x8 ... >; Having a look on virq mapping gives : mvBL-M7> cat /sys/kernel/debug/powerpc/virq_mapping virq hwirq chip name host name 16 0x0000e IPIC /soc@e0000000/pic@700 17 0x0000f IPIC /soc@e0000000/pic@700 18 0x00009 IPIC /soc@e0000000/pic@700 20 0x00010 IPIC /soc@e0000000/pic@700 32 0x00020 IPIC /soc@e0000000/pic@700 33 0x00021 IPIC /soc@e0000000/pic@700 34 0x00022 IPIC /soc@e0000000/pic@700 38 0x00026 IPIC /soc@e0000000/pic@700 48 0x00030 IPIC /soc@e0000000/pic@700 After loading the device driver (=mvbcdma) the irq shows up correctly. mvBL-M7> cat /proc/interrupts CPU0 16: 603 IPIC Level i2c-mpc 17: 8 IPIC Level i2c-mpc 18: 295 IPIC Level serial 20: 341 IPIC Level mpc83xx_spi 32: 2 IPIC Level enet_tx 33: 3 IPIC Level enet_rx 34: 0 IPIC Level enet_error 38: 0 IPIC Level ehci_hcd:usb1 48: 0 IPIC Level mvbcdma0 BAD: 0 As soon as the device generates an interrupt I get : irq 48: nobody cared (try booting with the "irqpoll" option) handlers: [] (mvbcdma_irq+0x0/0x180 [mvbcdma]) Disabling IRQ #48 The handler _would_ have returned IRQ_RETVAL(1). Obviously the handler isn't called at all - but why ? Using "nm" on the kernel module gives : 000006e8 t mvbcdma_irq ->offset 0x6e8 inside module matches with output regarding handler. Any help is welcome ! regards, Andre Schwarz MATRIX VISION GmbH, Talstraße 16, DE-71570 Oppenweiler - Registergericht: Amtsgericht Stuttgart, HRB 271090 Geschäftsführer: Gerhard Thullner, Werner Armingeon, Uwe Furtner