arch/sparc/include/asm/upa.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/upa.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/upa.h
Extension
.h
Size
3810 bytes
Lines
111
Domain
Architecture Layer
Bucket
arch/sparc
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 _SPARC64_UPA_H
#define _SPARC64_UPA_H

#include <asm/asi.h>

/* UPA level registers and defines. */

/* UPA Config Register */
#define UPA_CONFIG_RESV		0xffffffffc0000000 /* Reserved.                    */
#define UPA_CONFIG_PCON		0x000000003fc00000 /* Depth of various sys queues. */
#define UPA_CONFIG_MID		0x00000000003e0000 /* Module ID.                   */
#define UPA_CONFIG_PCAP		0x000000000001ffff /* Port Capabilities.           */

/* UPA Port ID Register */
#define UPA_PORTID_FNP		0xff00000000000000 /* Hardcoded to 0xfc on ultra.  */
#define UPA_PORTID_RESV		0x00fffff800000000 /* Reserved.                    */
#define UPA_PORTID_ECCVALID     0x0000000400000000 /* Zero if mod can generate ECC */
#define UPA_PORTID_ONEREAD      0x0000000200000000 /* Set if mod generates P_RASB  */
#define UPA_PORTID_PINTRDQ      0x0000000180000000 /* # outstanding P_INT_REQ's    */
#define UPA_PORTID_PREQDQ       0x000000007e000000 /* slave-wr's to mod supported  */
#define UPA_PORTID_PREQRD       0x0000000001e00000 /* # incoming P_REQ's supported */
#define UPA_PORTID_UPACAP       0x00000000001f0000 /* UPA capabilities of mod      */
#define UPA_PORTID_ID           0x000000000000ffff /* Module Identification bits  */

/* UPA I/O space accessors */
#if defined(__KERNEL__) && !defined(__ASSEMBLER__)
static inline unsigned char _upa_readb(unsigned long addr)
{
	unsigned char ret;

	__asm__ __volatile__("lduba\t[%1] %2, %0\t/* upa_readb */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline unsigned short _upa_readw(unsigned long addr)
{
	unsigned short ret;

	__asm__ __volatile__("lduha\t[%1] %2, %0\t/* upa_readw */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline unsigned int _upa_readl(unsigned long addr)
{
	unsigned int ret;

	__asm__ __volatile__("lduwa\t[%1] %2, %0\t/* upa_readl */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline unsigned long _upa_readq(unsigned long addr)
{
	unsigned long ret;

	__asm__ __volatile__("ldxa\t[%1] %2, %0\t/* upa_readq */"
			     : "=r" (ret)
			     : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));

	return ret;
}

static inline void _upa_writeb(unsigned char b, unsigned long addr)
{
	__asm__ __volatile__("stba\t%0, [%1] %2\t/* upa_writeb */"
			     : /* no outputs */
			     : "r" (b), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void _upa_writew(unsigned short w, unsigned long addr)
{
	__asm__ __volatile__("stha\t%0, [%1] %2\t/* upa_writew */"
			     : /* no outputs */
			     : "r" (w), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

static inline void _upa_writel(unsigned int l, unsigned long addr)
{
	__asm__ __volatile__("stwa\t%0, [%1] %2\t/* upa_writel */"
			     : /* no outputs */
			     : "r" (l), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
}

Annotation

Implementation Notes