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[PATCH] Initial generic hypertransport interrupt support

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This patch implements two functions ht_create_irq and ht_destroy_irq for
use by drivers.  Several other functions are implemented as helpers for
arch specific irq_chip handlers.

The driver for the card I tested this on isn't yet ready to be merged.
However this code is and hypertransport irqs are in use in a few other
places in the kernel.  Not that any of this will get merged before 2.6.19

Because the ipath-ht400 is slightly out of spec this code will need to be
generalized to work there.

I think all of the powerpc uses are for a plain interrupt controller in a
chipset so support for native hypertransport devices is a little less
interesting.

However I think this is a half way decent model on how to separate arch
specific and generic helper code, and I think this is a functional model of
how to get the architecture dependencies out of the msi code.

[[email protected]: Kconfig fix]
Signed-off-by: Eric W. Biederman <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Eric W. Biederman 2006-10-04 02:16:55 -07:00 • committed by Linus Torvalds
commit 8b955b0ddd
8 changed files with 486 additions and 0 deletions
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42
include/asm-i386/hypertransport.h Normal file
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#ifndef ASM_HYPERTRANSPORT_H
#define ASM_HYPERTRANSPORT_H
/*
* Constants for x86 Hypertransport Interrupts.
*/
#define HT_IRQ_LOW_BASE 0xf8000000
#define HT_IRQ_LOW_VECTOR_SHIFT 16
#define HT_IRQ_LOW_VECTOR_MASK 0x00ff0000
#define HT_IRQ_LOW_VECTOR(v) (((v) << HT_IRQ_LOW_VECTOR_SHIFT) & HT_IRQ_LOW_VECTOR_MASK)
#define HT_IRQ_LOW_DEST_ID_SHIFT 8
#define HT_IRQ_LOW_DEST_ID_MASK 0x0000ff00
#define HT_IRQ_LOW_DEST_ID(v) (((v) << HT_IRQ_LOW_DEST_ID_SHIFT) & HT_IRQ_LOW_DEST_ID_MASK)
#define HT_IRQ_LOW_DM_PHYSICAL 0x0000000
#define HT_IRQ_LOW_DM_LOGICAL 0x0000040
#define HT_IRQ_LOW_RQEOI_EDGE 0x0000000
#define HT_IRQ_LOW_RQEOI_LEVEL 0x0000020
#define HT_IRQ_LOW_MT_FIXED 0x0000000
#define HT_IRQ_LOW_MT_ARBITRATED 0x0000004
#define HT_IRQ_LOW_MT_SMI 0x0000008
#define HT_IRQ_LOW_MT_NMI 0x000000c
#define HT_IRQ_LOW_MT_INIT 0x0000010
#define HT_IRQ_LOW_MT_STARTUP 0x0000014
#define HT_IRQ_LOW_MT_EXTINT 0x0000018
#define HT_IRQ_LOW_MT_LINT1 0x000008c
#define HT_IRQ_LOW_MT_LINT0 0x0000098
#define HT_IRQ_LOW_IRQ_MASKED 0x0000001
#define HT_IRQ_HIGH_DEST_ID_SHIFT 0
#define HT_IRQ_HIGH_DEST_ID_MASK 0x00ffffff
#define HT_IRQ_HIGH_DEST_ID(v) ((((v) >> 8) << HT_IRQ_HIGH_DEST_ID_SHIFT) & HT_IRQ_HIGH_DEST_ID_MASK)
#endif /* ASM_HYPERTRANSPORT_H */