From ef3548668c02cc8c3922f4423f32b53e662811c6 Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Mon, 9 Nov 2009 11:24:14 -0800 Subject: x86, pic: Introduce legacy_pic abstraction This patch makes i8259A like legacy programmable interrupt controller code into a driver so that legacy pic functions can be selected at runtime based on platform information, such as HW subarchitecure ID. Default structure of legacy_pic maintains the current code path for x86pc. Signed-off-by: Jacob Pan LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D03@orsmsx508.amr.corp.intel.com> Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/i8259.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch/x86/include') diff --git a/arch/x86/include/asm/i8259.h b/arch/x86/include/asm/i8259.h index 58d7091eeb1..e8a3e05c288 100644 --- a/arch/x86/include/asm/i8259.h +++ b/arch/x86/include/asm/i8259.h @@ -57,6 +57,19 @@ static inline void outb_pic(unsigned char value, unsigned int port) extern struct irq_chip i8259A_chip; +struct legacy_pic { + int nr_legacy_irqs; + struct irq_chip *chip; + void (*mask_all)(void); + void (*restore_mask)(void); + void (*init)(int auto_eoi); + int (*irq_pending)(unsigned int irq); + void (*make_irq)(unsigned int irq); +}; + +extern struct legacy_pic *legacy_pic; +extern struct legacy_pic null_legacy_pic; + extern void mask_8259A(void); extern void unmask_8259A(void); -- cgit v1.2.3-70-g09d2