arch/mips/include/asm/sn/intr.h

Source file repositories/reference/linux-study-clean/arch/mips/include/asm/sn/intr.h

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/sn/intr.h
Extension
.h
Size
2663 bytes
Lines
113
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ASM_SN_INTR_H
#define __ASM_SN_INTR_H

/*
 * Macros to manipulate the interrupt register on the calling hub chip.
 */

#define LOCAL_HUB_SEND_INTR(level)				\
	LOCAL_HUB_S(PI_INT_PEND_MOD, (0x100 | (level)))
#define REMOTE_HUB_SEND_INTR(hub, level)			\
	REMOTE_HUB_S((hub), PI_INT_PEND_MOD, (0x100 | (level)))

/*
 * When clearing the interrupt, make sure this clear does make it
 * to the hub. Otherwise we could end up losing interrupts.
 * We do an uncached load of the int_pend0 register to ensure this.
 */

#define LOCAL_HUB_CLR_INTR(level)				\
do {								\
	LOCAL_HUB_S(PI_INT_PEND_MOD, (level));			\
	LOCAL_HUB_L(PI_INT_PEND0);				\
} while (0);

#define REMOTE_HUB_CLR_INTR(hub, level)				\
do {								\
	nasid_t	 __hub = (hub);					\
								\
	REMOTE_HUB_S(__hub, PI_INT_PEND_MOD, (level));		\
	REMOTE_HUB_L(__hub, PI_INT_PEND0);			\
} while (0);

/*
 * Hard-coded interrupt levels:
 */

/*
 *	L0 = SW1
 *	L1 = SW2
 *	L2 = INT_PEND0
 *	L3 = INT_PEND1
 *	L4 = RTC
 *	L5 = Profiling Timer
 *	L6 = Hub Errors
 *	L7 = Count/Compare (T5 counters)
 */


/*
 * INT_PEND0 hard-coded bits.
 */

/*
 * INT_PEND0 bits determined by hardware:
 */
#define RESERVED_INTR		 0	/* What is this bit? */
#define GFX_INTR_A		 1
#define GFX_INTR_B		 2
#define PG_MIG_INTR		 3
#define UART_INTR		 4
#define CC_PEND_A		 5
#define CC_PEND_B		 6

/*
 * INT_PEND0 used by the kernel for itself ...
 */
#define CPU_RESCHED_A_IRQ	 7
#define CPU_RESCHED_B_IRQ	 8
#define CPU_CALL_A_IRQ		 9
#define CPU_CALL_B_IRQ		10

/*
 * INT_PEND1 hard-coded bits:
 */
#define NI_BRDCAST_ERR_A	39
#define NI_BRDCAST_ERR_B	40

#define LLP_PFAIL_INTR_A	41	/* see ml/SN/SN0/sysctlr.c */
#define LLP_PFAIL_INTR_B	42

#define TLB_INTR_A		43	/* used for tlb flush random */
#define TLB_INTR_B		44

#define IP27_INTR_0		45	/* Reserved for PROM use */
#define IP27_INTR_1		46	/* do not use in Kernel */
#define IP27_INTR_2		47
#define IP27_INTR_3		48
#define IP27_INTR_4		49
#define IP27_INTR_5		50
#define IP27_INTR_6		51

Annotation

Implementation Notes