[PATCH] Initial generic hypertransport interrupt support
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.
[akpm@osdl.org: Kconfig fix]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Greg KH <greg@kroah.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-i386/hypertransport.h b/include/asm-i386/hypertransport.h
new file mode 100644
index 0000000..c16c6ff
--- /dev/null
+++ b/include/asm-i386/hypertransport.h
@@ -0,0 +1,42 @@
+#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 */