From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wf-out-1314.google.com (wf-out-1314.google.com [209.85.200.168]) by ozlabs.org (Postfix) with ESMTP id 02979DDDA1 for ; Tue, 24 Feb 2009 04:04:26 +1100 (EST) Received: by wf-out-1314.google.com with SMTP id 27so2213203wfd.15 for ; Mon, 23 Feb 2009 09:04:25 -0800 (PST) MIME-Version: 1.0 In-Reply-To: <85a5c2010902230648m72b63eeds70b4e7a5ec4d8c51@mail.gmail.com> References: <85a5c2010902230439n1096196dr519462513bc3910d@mail.gmail.com> <85a5c2010902230648m72b63eeds70b4e7a5ec4d8c51@mail.gmail.com> Date: Mon, 23 Feb 2009 22:34:25 +0530 Message-ID: Subject: Re: Problem with decrementer interrupt From: sumedh tirodkar To: Matt Gessner Content-Type: text/plain; charset=ISO-8859-1 Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Alright...I am trying to develop a system of my own.. Consider that i am not using any linux kernel...I m writing some program right from scratch......... The major steps that i have taken are... 1. Started with a assembly file... 2. Have relocated the interrupt handlers to there respective positions...The interrupt handlers are written in assembly language... 3. Initialised Decrementer register to get an interrupt after some interval... 4. Jump to some function using bl function_name_main which will have a infinite while loop.. This works fine i.e. the interrupts(decrementer interrupt to be more specific) work fine...I have initialised serial port to get the output... Now, the problem that i am facing.... If in interrupt handler of the decrementer, i make a call to some C function in some other C file...using the follwing statement... Dec_handler: /* I have relocated this to interrupt vector address of decrementer interrupt*/ /*code to print using serial port*/ bla /*code to call some function in C file*/ /*code to print using serial port---but i m never able to see this output*/ RFI This starts creating a problem...somehow we dont return to this code after the end of the function_name_handler... Consider the following code for the function_name_handler: void function_name_handler(void) { /*Some action*/ } So, if its possible for anyone to help me with this...please reply... Regards, Sumedh On Mon, Feb 23, 2009 at 8:18 PM, Matt Gessner wrote: > > > On Mon, Feb 23, 2009 at 8:03 AM, sumedh tirodkar > wrote: >> >> I am using PowerPC 7447A...I am trying to port SA-RTL on PowerPC... > > What I said earlier was: You need to tell people what cpu you're using, what > linux kernel, etc etc etc. > > Fine, we know the CPU. What kernel are you using? Is it ancient? > > I doubt the information below is going to be useful... > >> >> I am using >> >> bla >> >> from the assembly code to call the function in C file...This i am >> doing from interrupt handler of the decrementer... >> If any more details are required, please let me know... > >