Re: Try to Disable PPC Interrupt
On Thu, 2007-03-29 at 13:41 -0500, Kumar Gala wrote: > > It seems the 16th bit (EE) has been set to 0, but what should I do > > to make sure whether the external interrupt is disabled or not? > > Thank you very much. > > What exactly are you asking? If MSR[EE] = 0, interrupts are disabled. Since you're on a 405, you can actually test this from within your code still. Use the SRS bits in the UICs to generate a spurious interrupt at the UIC level for something that is currently enabled in the ER register. If you still get an interrupt at the CPU with MSR[EE] == 0, then you've found a very odd bug indeed. But as Kumar says, if MSR[EE] == 0, external interrupts are disabled. Of course, that doesn't mean that debug, machine check, or critical interrupts are. (How to use the SRS bits in the UICs is an exercise left up to the reader.) josh ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Re: Try to Disable PPC Interrupt
On Mar 28, 2007, at 11:20 PM, Zhou Rui wrote: > Hi > Sorry for my silly mistake, and I modify it like this: > #ifndef MODULE > #define MODULE > #endif > > #ifndef __KERNEL__ > #define __KERNEL__ > #endif > > #include > #include > #include > #include > > void hw_disable_irq (void) { > int c; > __asm__ __volatile__( > "mfmsr %%r0; \ > wrteei 0; \ > mfmsr %0;":"=r"(c) : ); > Why don't use use local_irq_disable() ? > printk("%x\n",c); > } > > int init_module(void) > { > hw_disable_irq(); > } > > void cleanup_module(void) > { > } > > MODULE_LICENSE("GPL"); > > > I can get the output is 0x21030. But I also use BDI2000 here and > when I halt the board from BDI2000, I get > 405EP>halt > Core number: 0 > Core state : debug mode > Debug entry cause : JTAG stop request > Current PC : 0xc00042d8 > Current CR : 0x22004082 > Current MSR : 0x00029030 > Current LR : 0xc00042d8 > Hope my understanding for big endian is right. It seems 0x00029030 > in MSR is > 0010 1001 0011, but 0x21030 is > 0010 0001 0011. > It seems the 16th bit (EE) has been set to 0, but what should I do > to make sure whether the external interrupt is disabled or not? > Thank you very much. What exactly are you asking? If MSR[EE] = 0, interrupts are disabled. - k ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Re: Try to Disable PPC Interrupt
Hi Sorry for my silly mistake, and I modify it like this: #ifndef MODULE #define MODULE #endif #ifndef __KERNEL__ #define __KERNEL__ #endif #include #include #include #include void hw_disable_irq (void) { int c; __asm__ __volatile__( "mfmsr %%r0; \ wrteei 0; \ mfmsr %0;":"=r"(c) : ); printk("%x\n",c); } int init_module(void) { hw_disable_irq(); } void cleanup_module(void) { } MODULE_LICENSE("GPL"); I can get the output is 0x21030. But I also use BDI2000 here and when I halt the board from BDI2000, I get 405EP>halt Core number: 0 Core state : debug mode Debug entry cause : JTAG stop request Current PC : 0xc00042d8 Current CR : 0x22004082 Current MSR : 0x00029030 Current LR : 0xc00042d8 Hope my understanding for big endian is right. It seems 0x00029030 in MSR is 0010 1001 0011, but 0x21030 is 0010 0001 0011. It seems the 16th bit (EE) has been set to 0, but what should I do to make sure whether the external interrupt is disabled or not? Thank you very much. Grant Likely <[EMAIL PROTECTED]> 写道: On 3/28/07, Zhou Rui wrote: > Hi, all > I am trying to disable interrupt on a PPC405EP board. I have checked > from the 405 maunual that once the EE bit of MSR is set to 0, the external > interrupt will be disabled. So I write a simple test module for that: > > #ifndef MODULE > #define MODULE > #endif > > #ifndef __KERNEL__ > #define __KERNEL__ > #endif > > #include > #include > #include > #include > > void hw_disable_irq (void) { > int c; > __asm__ __volatile__( > "mfmsr %%r0; \ > wrteei 0; \ > mfmsr %0;":"=r"(c) : ); > > printk("%h\n",c); > } > > int init_module(void) > { > } > > void cleanup_module(void) > { > } > > MODULE_LICENSE("GPL"); > > When I insert this module, it seems nothing happens and there is no output > of the varible "c". So would you like to tell me what the problem is here? > Thank you very much. Umm, because this modules doesn't do anything perhaps? You've declared init and cleanup routines, but there are two problems with them. 1. You haven't used the module_init and module_exit macros to actually register them as init/exit routines. 2. They're empty There is no possible way for your hw_disable_irq() routine to get called. Cheers, g. -- Grant Likely, B.Sc. P.Eng. Secret Lab Technologies Ltd. [EMAIL PROTECTED] (403) 399-0195 Sorry for my silly mistake, and I modify it like this: #ifndef MODULE #define MODULE #endif #ifndef __KERNEL__ #define __KERNEL__ #endif #include #include #include #include void hw_disable_irq (void) { int c; __asm__ __volatile__( "mfmsr %%r0; \ wrteei 0; \ mfmsr %0;":"=r"(c) : ); printk("%x\n",c); } int init_module(void) { hw_disable_irq(); } void cleanup_module(void) { } MODULE_LICENSE("GPL"); I can get the output is 0x21030. But I also use BDI2000 here and when I halt the board from BDI2000, I get 405EP>halt Core number: 0 Core state : debug mode Debug entry cause : JTAG stop request Current PC : 0xc00042d8 Current CR : 0x22004082 Current MSR : 0x00029030 Current LR : 0xc00042d8 Hope my understanding for big endian is right. It seems 0x00029030 in MSR is 0010 1001 0011, but 0x21030 is 0010 0001 0011. It seems the 16th bit (EE) has been set to 0, but what should I do to make sure whether the external interrupt is disabled or not? Thank you very much. Best wishes Zhou Rui Distributed and Embedded System Lab Room 532, Information Building School of Information Science - 抢注雅虎免费邮箱-3.5G容量,20M附件! ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Re: Try to Disable PPC Interrupt
On 3/28/07, Zhou Rui <[EMAIL PROTECTED]> wrote: > Hi, all > I am trying to disable interrupt on a PPC405EP board. I have checked > from the 405 maunual that once the EE bit of MSR is set to 0, the external > interrupt will be disabled. So I write a simple test module for that: > > #ifndef MODULE > #define MODULE > #endif > > #ifndef __KERNEL__ > #define __KERNEL__ > #endif > > #include > #include > #include > #include > > void hw_disable_irq (void) { > int c; > __asm__ __volatile__( > "mfmsr %%r0; \ > wrteei 0; \ > mfmsr %0;":"=r"(c) : ); > > printk("%h\n",c); > } > > int init_module(void) > { > } > > void cleanup_module(void) > { > } > > MODULE_LICENSE("GPL"); > > When I insert this module, it seems nothing happens and there is no output > of the varible "c". So would you like to tell me what the problem is here? > Thank you very much. Umm, because this modules doesn't do anything perhaps? You've declared init and cleanup routines, but there are two problems with them. 1. You haven't used the module_init and module_exit macros to actually register them as init/exit routines. 2. They're empty There is no possible way for your hw_disable_irq() routine to get called. Cheers, g. -- Grant Likely, B.Sc. P.Eng. Secret Lab Technologies Ltd. [EMAIL PROTECTED] (403) 399-0195 ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Try to Disable PPC Interrupt
Hi, all I am trying to disable interrupt on a PPC405EP board. I have checked from the 405 maunual that once the EE bit of MSR is set to 0, the external interrupt will be disabled. So I write a simple test module for that: #ifndef MODULE #define MODULE #endif #ifndef __KERNEL__ #define __KERNEL__ #endif #include #include #include #include void hw_disable_irq (void) { int c; __asm__ __volatile__( "mfmsr %%r0; \ wrteei 0; \ mfmsr %0;":"=r"(c) : ); printk("%h\n",c); } int init_module(void) { } void cleanup_module(void) { } MODULE_LICENSE("GPL"); When I insert this module, it seems nothing happens and there is no output of the varible "c". So would you like to tell me what the problem is here? Thank you very much. Best wishes Zhou Rui Distributed & Embedded System Lab School of Information Science & Engineering Lanzhou University, P. R. China http://dslab.lzu.edu.cn/~zr/ - Mp3疯狂搜-新歌热歌高速下 ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded