src/patches/suse-2.6.27.25/patches.arch/x2APIC_PATCH_12_of_41_d94d93ca5cc36cd78c532def62772c98fe8ba5d7

   1 From: Suresh Siddha <suresh.b.siddha@intel.com>
   2 Subject: x64, x2apic/intr-remap: 8259 specific mask/unmask routines
   3 References: fate #303948 and fate #303984
   4 Patch-Mainline: queued for .28
   5 Commit-ID: d94d93ca5cc36cd78c532def62772c98fe8ba5d7
   6
   7 Signed-off-by: Thomas Renninger <trenn@suse.de>
   8
   9 8259 specific mask/unmask routines which be used later while enabling
  10 interrupt-remapping.
  11
  12 Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
  13 Cc: akpm@linux-foundation.org
  14 Cc: arjan@linux.intel.com
  15 Cc: andi@firstfloor.org
  16 Cc: ebiederm@xmission.com
  17 Cc: jbarnes@virtuousgeek.org
  18 Cc: steiner@sgi.com
  19 Signed-off-by: Ingo Molnar <mingo@elte.hu>
  20
  21 ---
  22  arch/x86/kernel/i8259.c |   24 ++++++++++++++++++++++++
  23  include/asm-x86/i8259.h |    3 +++
  24  2 files changed, 27 insertions(+)
  25
  26 Index: linux-2.6.26/arch/x86/kernel/i8259.c
  27 ===================================================================
  28 --- linux-2.6.26.orig/arch/x86/kernel/i8259.c
  29 +++ linux-2.6.26/arch/x86/kernel/i8259.c
  30 @@ -282,6 +282,30 @@ static int __init i8259A_init_sysfs(void
  31
  32  device_initcall(i8259A_init_sysfs);
  33
  34 +void mask_8259A(void)
  35 +{
  36 +       unsigned long flags;
  37 +
  38 +       spin_lock_irqsave(&i8259A_lock, flags);
  39 +
  40 +       outb(0xff, PIC_MASTER_IMR);     /* mask all of 8259A-1 */
  41 +       outb(0xff, PIC_SLAVE_IMR);      /* mask all of 8259A-2 */
  42 +
  43 +       spin_unlock_irqrestore(&i8259A_lock, flags);
  44 +}
  45 +
  46 +void unmask_8259A(void)
  47 +{
  48 +       unsigned long flags;
  49 +
  50 +       spin_lock_irqsave(&i8259A_lock, flags);
  51 +
  52 +       outb(cached_master_mask, PIC_MASTER_IMR); /* restore master IRQ mask */
  53 +       outb(cached_slave_mask, PIC_SLAVE_IMR);   /* restore slave IRQ mask */
  54 +
  55 +       spin_unlock_irqrestore(&i8259A_lock, flags);
  56 +}
  57 +
  58  void init_8259A(int auto_eoi)
  59  {
  60         unsigned long flags;
  61 Index: linux-2.6.26/include/asm-x86/i8259.h
  62 ===================================================================
  63 --- linux-2.6.26.orig/include/asm-x86/i8259.h
  64 +++ linux-2.6.26/include/asm-x86/i8259.h
  65 @@ -57,4 +57,7 @@ static inline void outb_pic(unsigned cha
  66
  67  extern struct irq_chip i8259A_chip;
  68
  69 +extern void mask_8259A(void);
  70 +extern void unmask_8259A(void);
  71 +
  72  #endif /* __ASM_I8259_H__ */