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-rw-r--r--arch/powerpc/platforms/cell/interrupt.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/interrupt.h b/arch/powerpc/platforms/cell/interrupt.h
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+++ b/arch/powerpc/platforms/cell/interrupt.h
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+#ifndef ASM_CELL_PIC_H
+#define ASM_CELL_PIC_H
+#ifdef __KERNEL__
+/*
+ * Mapping of IIC pending bits into per-node
+ * interrupt numbers.
+ *
+ * IRQ FF CC SS PP FF CC SS PP Description
+ *
+ * 00-3f 80 02 +0 00 - 80 02 +0 3f South Bridge
+ * 00-3f 80 02 +b 00 - 80 02 +b 3f South Bridge
+ * 41-4a 80 00 +1 ** - 80 00 +a ** SPU Class 0
+ * 51-5a 80 01 +1 ** - 80 01 +a ** SPU Class 1
+ * 61-6a 80 02 +1 ** - 80 02 +a ** SPU Class 2
+ * 70-7f C0 ** ** 00 - C0 ** ** 0f IPI
+ *
+ * F flags
+ * C class
+ * S source
+ * P Priority
+ * + node number
+ * * don't care
+ *
+ * A node consists of a Cell Broadband Engine and an optional
+ * south bridge device providing a maximum of 64 IRQs.
+ * The south bridge may be connected to either IOIF0
+ * or IOIF1.
+ * Each SPE is represented as three IRQ lines, one per
+ * interrupt class.
+ * 16 IRQ numbers are reserved for inter processor
+ * interruptions, although these are only used in the
+ * range of the first node.
+ *
+ * This scheme needs 128 IRQ numbers per BIF node ID,
+ * which means that with the total of 512 lines
+ * available, we can have a maximum of four nodes.
+ */
+
+enum {
+ IIC_EXT_OFFSET = 0x00, /* Start of south bridge IRQs */
+ IIC_NUM_EXT = 0x40, /* Number of south bridge IRQs */
+ IIC_SPE_OFFSET = 0x40, /* Start of SPE interrupts */
+ IIC_CLASS_STRIDE = 0x10, /* SPE IRQs per class */
+ IIC_IPI_OFFSET = 0x70, /* Start of IPI IRQs */
+ IIC_NUM_IPIS = 0x10, /* IRQs reserved for IPI */
+ IIC_NODE_STRIDE = 0x80, /* Total IRQs per node */
+};
+
+extern void iic_init_IRQ(void);
+extern int iic_get_irq(struct pt_regs *regs);
+extern void iic_cause_IPI(int cpu, int mesg);
+extern void iic_request_IPIs(void);
+extern void iic_setup_cpu(void);
+extern void iic_local_enable(void);
+extern void iic_local_disable(void);
+
+
+extern void spider_init_IRQ(void);
+extern int spider_get_irq(unsigned long int_pending);
+
+#endif
+#endif /* ASM_CELL_PIC_H */

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