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List:       osdl-fastboot
Subject:    Re: [Fastboot] Some problems when build kexec-tools on ppc64	machine
From:       Mohan Kumar M <mohan () in ! ibm ! com>
Date:       2005-12-28 9:59:00
Message-ID: 1135763220.6042.6.camel () explorer ! in ! ibm ! com
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On Wed, 2005-12-28 at 13:32, Jin Qi Huang wrote:
> Any opinion? If no, I will submit a patch to the kernel maillist to
> solve the problem.
> 
> Best Regards,
> 
> Huang Jin Qi(黄谨奇) 
> LTC and Power Linux Test, China Development Lab, Beijing
> Tel: 86-10-82782244 Ext. 3250 Email: huangjq@cn.ibm.com
> 

Hi Huang,

The pSeries_discover_pic patch is already submitted to Paulus by Haren,
but it is not yet integrated with the mainline kernel.

Regards,
Mohan.

> 
> Jin Qi Huang/China/Contr/IBM
> 
> 2005-12-28 13:43
>                To
> fastboot@lists.osdl.org
>                cc
> mohan@in.ibm.com,
> rende@cn.ibm.com
>           Subject
> Re: [Fastboot]
> Some problems
> when build
> kexec-tools on
> ppc64      
> machineLink
> 
> 
> 
> On the ppc64 machine, there are total three interrupt controllers got
> from Open Firmware device tree:
> IBM,ppc-xicp
> ibm,ppc-xics
> ibm,ppc-xics
> this is the sequence provided by Open Firmware device tree after the
> normal boot, but after execute "kexec -l /boot/vmlinux-2.6.15-rc7
> --append="root=/dev/sda2 selinux=0 elevator=cfq console=tty0
> console=hvsi0,9600" -f" to boot another kernel, the sequence is
> changed to:
> ibm,ppc-xics
> ibm,ppc-xics
> IBM,ppc-xicp
> 
> the pSeries_discover_pic function only check the first interrupt
> controller will get error, I do not know why the sequence is changed,
> but we can modify the pSeries_discover_pic function to solve the
> problem:
> static  void __init pSeries_discover_pic(void)
> {
>         struct device_node *np;
>         char *typep;
> 
>         /*
>          * Setup interrupt mapping options that are needed for
> finish_device_tree
>          * to properly parse the OF interrupt tree & do the virtual
> irq mapping
>          */
>         __irq_offset_value = NUM_ISA_INTERRUPTS;
>         ppc64_interrupt_controller = IC_INVALID;
>         for (np = NULL; (np = of_find_node_by_name(np,
> "interrupt-controller"));) {
>                 typep = (char *)get_property(np, "compatible", NULL);
>                 if (strstr(typep, "open-pic"))
>                 {
>                         ppc64_interrupt_controller = IC_OPEN_PIC;
>                         break;
>                 }
>                 else if (strstr(typep, "ppc-xicp"))
>                 {
>                         ppc64_interrupt_controller = IC_PPC_XIC;
>                         break;
>                 }
>         }
>         
>         if(ppc64_interrupt_controller == IC_INVALID)
>                 printk("pSeries_discover_pic: failed to recognize"
>                         " interrupt-controller\n");
> }
> 
> Best Regards,
> 
> Huang Jin Qi(黄谨奇) 
> LTC and Power Linux Test, China Development Lab, Beijing
> Tel: 86-10-82782244 Ext. 3250 Email: huangjq@cn.ibm.com




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