addrs.h

linux-2.6.15.6

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1992 - 1997, 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 1999, 2000 by Ralf Baechle
 */
#ifndef _ASM_SN_ADDRS_H
#define _ASM_SN_ADDRS_H

#include <linux/config.h>

#ifndef __ASSEMBLY__
#include <linux/types.h>
#endif /* !__ASSEMBLY__ */

#include <asm/addrspace.h>
#include <asm/sn/kldir.h>

#if defined(CONFIG_SGI_IP27)
#include <asm/sn/sn0/addrs.h>
#elif defined(CONFIG_SGI_IP35)
#include <asm/sn/sn1/addrs.h>
#endif


#ifndef __ASSEMBLY__

#if defined(CONFIG_SGI_IO)	/* FIXME */
#define PS_UINT_CAST		(__psunsigned_t)
#define UINT64_CAST		(__uint64_t)
#else	/* CONFIG_SGI_IO */
#define PS_UINT_CAST		(unsigned long)
#define UINT64_CAST		(unsigned long)
#endif	/* CONFIG_SGI_IO */

#define HUBREG_CAST		(volatile hubreg_t *)

#else /* __ASSEMBLY__ */

#define PS_UINT_CAST
#define UINT64_CAST
#define HUBREG_CAST

#endif /* __ASSEMBLY__ */


#define NASID_GET_META(_n)	((_n) >> NASID_LOCAL_BITS)
#ifdef CONFIG_SGI_IP27
#define NASID_GET_LOCAL(_n)	((_n) & 0xf)
#endif
#define NASID_MAKE(_m, _l)	(((_m) << NASID_LOCAL_BITS) | (_l))

#define NODE_ADDRSPACE_MASK	(NODE_ADDRSPACE_SIZE - 1)
#define TO_NODE_ADDRSPACE(_pa)	(UINT64_CAST (_pa) & NODE_ADDRSPACE_MASK)

#define CHANGE_ADDR_NASID(_pa, _nasid)	\
		((UINT64_CAST (_pa) & ~NASID_MASK) | \
		 (UINT64_CAST(_nasid) <<  NASID_SHFT))


/*
 * The following macros are used to index to the beginning of a specific
 * node's address space.
 */

#define NODE_OFFSET(_n)		(UINT64_CAST (_n) << NODE_SIZE_BITS)

#define NODE_CAC_BASE(_n)	(CAC_BASE   + NODE_OFFSET(_n))
#define NODE_HSPEC_BASE(_n)	(HSPEC_BASE + NODE_OFFSET(_n))
#define NODE_IO_BASE(_n)	(IO_BASE    + NODE_OFFSET(_n))
#define NODE_MSPEC_BASE(_n)	(MSPEC_BASE + NODE_OFFSET(_n))
#define NODE_UNCAC_BASE(_n)	(UNCAC_BASE + NODE_OFFSET(_n))

#define TO_NODE(_n, _x)		(NODE_OFFSET(_n)     | ((_x)		   ))
#define TO_NODE_CAC(_n, _x)	(NODE_CAC_BASE(_n)   | ((_x) & TO_PHYS_MASK))
#define TO_NODE_UNCAC(_n, _x)	(NODE_UNCAC_BASE(_n) | ((_x) & TO_PHYS_MASK))
#define TO_NODE_MSPEC(_n, _x)	(NODE_MSPEC_BASE(_n) | ((_x) & TO_PHYS_MASK))
#define TO_NODE_HSPEC(_n, _x)	(NODE_HSPEC_BASE(_n) | ((_x) & TO_PHYS_MASK))


#define RAW_NODE_SWIN_BASE(nasid, widget)				\
	(NODE_IO_BASE(nasid) + (UINT64_CAST (widget) << SWIN_SIZE_BITS))

#define WIDGETID_GET(addr)	((unsigned char)((addr >> SWIN_SIZE_BITS) & 0xff))

/*
 * The following definitions pertain to the IO special address
 * space.  They define the location of the big and little windows
 * of any given node.
 */

#define SWIN_SIZE_BITS		24
#define SWIN_SIZE		(UINT64_CAST 1 << 24)
#define	SWIN_SIZEMASK		(SWIN_SIZE - 1)
#define	SWIN_WIDGET_MASK	0xF

/*
 * Convert smallwindow address to xtalk address.
 *
 * 'addr' can be physical or virtual address, but will be converted
 * to Xtalk address in the range 0 -> SWINZ_SIZEMASK
 */
#define	SWIN_WIDGETADDR(addr)	((addr) & SWIN_SIZEMASK)
#define	SWIN_WIDGETNUM(addr)	(((addr)  >> SWIN_SIZE_BITS) & SWIN_WIDGET_MASK)
/*
 * Verify if addr belongs to small window address on node with "nasid"
 *
 *
 * NOTE: "addr" is expected to be XKPHYS address, and NOT physical
 * address
 *
 *
 */
#define	NODE_SWIN_ADDR(nasid, addr)	\
		(((addr) >= NODE_SWIN_BASE(nasid, 0))  && \
		 ((addr) <  (NODE_SWIN_BASE(nasid, HUB_NUM_WIDGET) + SWIN_SIZE)\
		 ))

/*
 * The following define the major position-independent aliases used
 * in SN.
 *	UALIAS -- 256MB in size, reads in the UALIAS result in
 *			uncached references to the memory of the reader's node.
 *	CPU_UALIAS -- 128kb in size, the bottom part of UALIAS is flipped
 *			depending on which CPU does the access to provide
 *			all CPUs with unique uncached memory at low addresses.
 *	LBOOT  -- 256MB in size, reads in the LBOOT area result in
 *			uncached references to the local hub's boot prom and
 *			other directory-bus connected devices.
 *	IALIAS -- 8MB in size, reads in the IALIAS result in uncached
 *			references to the local hub's registers.
 */

#define UALIAS_BASE		HSPEC_BASE
#define UALIAS_SIZE		0x10000000	/* 256 Megabytes */
#define UALIAS_LIMIT		(UALIAS_BASE + UALIAS_SIZE)

/*
 * The bottom of ualias space is flipped depending on whether you're
 * processor 0 or 1 within a node.
 */
#ifdef CONFIG_SGI_IP27
#define UALIAS_FLIP_BASE	UALIAS_BASE
#define UALIAS_FLIP_SIZE	0x20000
#define UALIAS_FLIP_BIT		0x10000
#define UALIAS_FLIP_ADDR(_x)	(cputoslice(smp_processor_id()) ? \
				 (_x) ^ UALIAS_FLIP_BIT : (_x))

#define LBOOT_BASE		(HSPEC_BASE + 0x10000000)
#define LBOOT_SIZE		0x10000000
#define LBOOT_LIMIT		(LBOOT_BASE + LBOOT_SIZE)
#define LBOOT_STRIDE		0		/* IP27 has only one CPU PROM */

#endif

#define	HUB_REGISTER_WIDGET	1
#define IALIAS_BASE		NODE_SWIN_BASE(0, HUB_REGISTER_WIDGET)
#define IALIAS_SIZE		0x800000	/* 8 Megabytes */
#define IS_IALIAS(_a)		(((_a) >= IALIAS_BASE) &&		\
				 ((_a) < (IALIAS_BASE + IALIAS_SIZE)))

/*
 * Macro for referring to Hub's RBOOT space
 */

#ifdef CONFIG_SGI_IP27
#define RBOOT_SIZE		0x10000000	/* 256 Megabytes */
#define NODE_RBOOT_BASE(_n)	(NODE_HSPEC_BASE(_n) + 0x30000000)
#define NODE_RBOOT_LIMIT(_n)	(NODE_RBOOT_BASE(_n) + RBOOT_SIZE)

#endif

/*
 * Macros for referring the Hub's back door space
 *
 *   These macros correctly process addresses in any node's space.
 *   WARNING: They won't work in assembler.
 *
 *   BDDIR_ENTRY_LO returns the address of the low double-word of the dir
 *                  entry corresponding to a physical (Cac or Uncac) address.
 *   BDDIR_ENTRY_HI returns the address of the high double-word of the entry.
 *   BDPRT_ENTRY    returns the address of the double-word protection entry
 *                  corresponding to the page containing the physical address.
 *   BDPRT_ENTRY_S  Stores the value into the protection entry.
 *   BDPRT_ENTRY_L  Load the value from the protection entry.
 *   BDECC_ENTRY    returns the address of the ECC byte corresponding to a
 *                  double-word at a specified physical address.
 *   BDECC_ENTRY_H  returns the address of the two ECC bytes corresponding to a
 *                  quad-word at a specified physical address.
 */
#define NODE_BDOOR_BASE(_n)	(NODE_HSPEC_BASE(_n) + (NODE_ADDRSPACE_SIZE/2))

#define NODE_BDECC_BASE(_n)	(NODE_BDOOR_BASE(_n))
#define NODE_BDDIR_BASE(_n)	(NODE_BDOOR_BASE(_n) + (NODE_ADDRSPACE_SIZE/4))
#ifdef CONFIG_SGI_IP27
#define BDDIR_ENTRY_LO(_pa)	((HSPEC_BASE +				      \
				  NODE_ADDRSPACE_SIZE * 3 / 4 +		      \
				  0x200)				    | \
				 UINT64_CAST (_pa)	 & NASID_MASK	    | \
				 UINT64_CAST (_pa) >> 2 & BDDIR_UPPER_MASK  | \
				 UINT64_CAST (_pa) >> 3 & 0x1f << 4)

#define BDDIR_ENTRY_HI(_pa)	((HSPEC_BASE +				      \
				  NODE_ADDRSPACE_SIZE * 3 / 4 +		      \
				  0x208)				    | \
				 UINT64_CAST (_pa)	 & NASID_MASK	    | \
				 UINT64_CAST (_pa) >> 2 & BDDIR_UPPER_MASK  | \
				 UINT64_CAST (_pa) >> 3 & 0x1f << 4)

#define BDPRT_ENTRY(_pa, _rgn)	((HSPEC_BASE +				      \
				  NODE_ADDRSPACE_SIZE * 3 / 4)		    | \
				 UINT64_CAST (_pa)	 & NASID_MASK	    | \
				 UINT64_CAST (_pa) >> 2 & BDDIR_UPPER_MASK  | \
				 (_rgn) << 3)
#define BDPRT_ENTRY_ADDR(_pa,_rgn) (BDPRT_ENTRY((_pa),(_rgn)))
#define BDPRT_ENTRY_S(_pa,_rgn,_val) (*(__psunsigned_t *)BDPRT_ENTRY((_pa),(_rgn))=(_val))
#define BDPRT_ENTRY_L(_pa,_rgn)	(*(__psunsigned_t *)BDPRT_ENTRY((_pa),(_rgn)))

#define BDECC_ENTRY(_pa)	((HSPEC_BASE +				      \
				  NODE_ADDRSPACE_SIZE / 2)		    | \
				 UINT64_CAST (_pa)	 & NASID_MASK	    | \
				 UINT64_CAST (_pa) >> 2 & BDECC_UPPER_MASK  | \
				 UINT64_CAST (_pa) >> 3 & 3)

/*
 * Macro to convert a back door directory or protection address into the
 *   raw physical address of the associated cache line or protection page.
 */