direct-io.hg

changeset 12944:d6ec02744592

[XEN][POWERPC] New interface ATTN() to conact the HW probe
Sometimes it is useful to have your code contact the HW probe directly
rather than call BUG().
Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
author Jimi Xenidis <jimix@watson.ibm.com>
date Tue Oct 10 09:11:32 2006 -0400 (2006-10-10)
parents 96670c42df39
children 0ff8b14fb530
files xen/arch/powerpc/setup.c xen/include/asm-powerpc/debugger.h
line diff
     1.1 --- a/xen/arch/powerpc/setup.c	Tue Oct 10 09:09:38 2006 -0400
     1.2 +++ b/xen/arch/powerpc/setup.c	Tue Oct 10 09:11:32 2006 -0400
     1.3 @@ -111,12 +111,20 @@ static void __init do_initcalls(void)
     1.4      }
     1.5  }
     1.6  
     1.7 -static void hw_probe_attn(unsigned char key, struct cpu_user_regs *regs)
     1.8 +
     1.9 +void noinline __attn(void)
    1.10  {
    1.11      /* To continue the probe will step over the ATTN instruction.  The
    1.12       * NOP is there to make sure there is something sane to "step
    1.13       * over" to. */
    1.14 -    asm volatile(".long 0x00000200; nop");
    1.15 +    console_start_sync();
    1.16 +    asm volatile("attn");
    1.17 +    console_end_sync();
    1.18 +}
    1.19 +
    1.20 +static void hw_probe_attn(unsigned char key, struct cpu_user_regs *regs)
    1.21 +{
    1.22 +    __attn();
    1.23  }
    1.24  
    1.25  static void percpu_init_areas(void)
     2.1 --- a/xen/include/asm-powerpc/debugger.h	Tue Oct 10 09:09:38 2006 -0400
     2.2 +++ b/xen/include/asm-powerpc/debugger.h	Tue Oct 10 09:11:32 2006 -0400
     2.3 @@ -68,6 +68,9 @@ extern void __warn(char *file, int line)
     2.4  #define WARN() __warn(__FILE__, __LINE__)
     2.5  #define WARN_ON(_p) do { if (_p) WARN(); } while ( 0 )
     2.6  
     2.7 +extern void __attn(void);
     2.8 +#define ATTN() __attn();
     2.9 +
    2.10  #define FORCE_CRASH() __force_crash()
    2.11  
    2.12  #ifdef CRASH_DEBUG