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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc64/irq.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-sparc64/irq.h')
-rw-r--r-- | include/asm-sparc64/irq.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h new file mode 100644 index 0000000..3aef0ca --- /dev/null +++ b/include/asm-sparc64/irq.h @@ -0,0 +1,157 @@ +/* $Id: irq.h,v 1.21 2002/01/23 11:27:36 davem Exp $ + * irq.h: IRQ registers on the 64-bit Sparc. + * + * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) + */ + +#ifndef _SPARC64_IRQ_H +#define _SPARC64_IRQ_H + +#include <linux/config.h> +#include <linux/linkage.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <asm/pil.h> +#include <asm/ptrace.h> + +/* You should not mess with this directly. That's the job of irq.c. + * + * If you make changes here, please update hand coded assembler of + * SBUS/floppy interrupt handler in entry.S -DaveM + * + * This is currently one DCACHE line, two buckets per L2 cache + * line. Keep this in mind please. + */ +struct ino_bucket { + /* Next handler in per-CPU PIL worklist. We know that + * bucket pointers have the high 32-bits clear, so to + * save space we only store the bits we need. + */ +/*0x00*/unsigned int irq_chain; + + /* PIL to schedule this IVEC at. */ +/*0x04*/unsigned char pil; + + /* If an IVEC arrives while irq_info is NULL, we + * set this to notify request_irq() about the event. + */ +/*0x05*/unsigned char pending; + + /* Miscellaneous flags. */ +/*0x06*/unsigned char flags; + + /* This is used to deal with IBF_DMA_SYNC on + * Sabre systems. + */ +/*0x07*/unsigned char synctab_ent; + + /* Reference to handler for this IRQ. If this is + * non-NULL this means it is active and should be + * serviced. Else the pending member is set to one + * and later registry of the interrupt checks for + * this condition. + * + * Normally this is just an irq_action structure. + * But, on PCI, if multiple interrupt sources behind + * a bridge have multiple interrupt sources that share + * the same INO bucket, this points to an array of + * pointers to four IRQ action structures. + */ +/*0x08*/void *irq_info; + + /* Sun5 Interrupt Clear Register. */ +/*0x10*/unsigned long iclr; + + /* Sun5 Interrupt Mapping Register. */ +/*0x18*/unsigned long imap; + +}; + +#ifdef CONFIG_PCI +extern unsigned long pci_dma_wsync; +extern unsigned long dma_sync_reg_table[256]; +extern unsigned char dma_sync_reg_table_entry; +#endif + +/* IMAP/ICLR register defines */ +#define IMAP_VALID 0x80000000 /* IRQ Enabled */ +#define IMAP_TID_UPA 0x7c000000 /* UPA TargetID */ +#define IMAP_TID_JBUS 0x7c000000 /* JBUS TargetID */ +#define IMAP_AID_SAFARI 0x7c000000 /* Safari AgentID */ +#define IMAP_NID_SAFARI 0x03e00000 /* Safari NodeID */ +#define IMAP_IGN 0x000007c0 /* IRQ Group Number */ +#define IMAP_INO 0x0000003f /* IRQ Number */ +#define IMAP_INR 0x000007ff /* Full interrupt number*/ + +#define ICLR_IDLE 0x00000000 /* Idle state */ +#define ICLR_TRANSMIT 0x00000001 /* Transmit state */ +#define ICLR_PENDING 0x00000003 /* Pending state */ + +/* Only 8-bits are available, be careful. -DaveM */ +#define IBF_DMA_SYNC 0x01 /* DMA synchronization behind PCI bridge needed. */ +#define IBF_PCI 0x02 /* Indicates PSYCHO/SABRE/SCHIZO PCI interrupt. */ +#define IBF_ACTIVE 0x04 /* This interrupt is active and has a handler. */ +#define IBF_MULTI 0x08 /* On PCI, indicates shared bucket. */ +#define IBF_INPROGRESS 0x10 /* IRQ is being serviced. */ + +#define NUM_IVECS (IMAP_INR + 1) +extern struct ino_bucket ivector_table[NUM_IVECS]; + +#define __irq_ino(irq) \ + (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0]) +#define __irq_pil(irq) ((struct ino_bucket *)(unsigned long)(irq))->pil +#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq)) +#define __irq(bucket) ((unsigned int)(unsigned long)(bucket)) + +static __inline__ char *__irq_itoa(unsigned int irq) +{ + static char buff[16]; + + sprintf(buff, "%d,%x", __irq_pil(irq), (unsigned int)__irq_ino(irq)); + return buff; +} + +#define NR_IRQS 16 + +#define irq_canonicalize(irq) (irq) +extern void disable_irq(unsigned int); +#define disable_irq_nosync disable_irq +extern void enable_irq(unsigned int); +extern unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long imap); +extern unsigned int sbus_build_irq(void *sbus, unsigned int ino); + +extern int request_fast_irq(unsigned int irq, + irqreturn_t (*handler)(int, void *, struct pt_regs *), + unsigned long flags, __const__ char *devname, + void *dev_id); + +static __inline__ void set_softint(unsigned long bits) +{ + __asm__ __volatile__("wr %0, 0x0, %%set_softint" + : /* No outputs */ + : "r" (bits)); +} + +static __inline__ void clear_softint(unsigned long bits) +{ + __asm__ __volatile__("wr %0, 0x0, %%clear_softint" + : /* No outputs */ + : "r" (bits)); +} + +static __inline__ unsigned long get_softint(void) +{ + unsigned long retval; + + __asm__ __volatile__("rd %%softint, %0" + : "=r" (retval)); + return retval; +} + +struct irqaction; +struct pt_regs; +int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *); + +#endif |