patch-2.4.19 linux-2.4.19/include/asm-ia64/sn/sn2/mmzone_sn2.h

• Lines: 166
• Date: Fri Aug 2 17:39:45 2002
• Orig file: linux-2.4.18/include/asm-ia64/sn/sn2/mmzone_sn2.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/include/asm-ia64/sn/sn2/mmzone_sn2.h linux-2.4.19/include/asm-ia64/sn/sn2/mmzone_sn2.h
@@ -0,0 +1,165 @@
+#ifndef _ASM_IA64_SN_MMZONE_SN2_H
+#define _ASM_IA64_SN_MMZONE_SN2_H
+
+/*
+ * 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) 2000-2002 Silicon Graphics, Inc.  All rights reserved.
+ */
+
+#include <linux/config.h>
+
+
+/*
+ * SGI SN2 Arch defined values
+ *
+ * 	An SN2 physical address is broken down as follows:
+ *
+ *             +-----------------------------------------+
+ *             |         |      |    |   node offset     |
+ *             | unused  | node | AS |-------------------|
+ *             |         |      |    | cn | clump offset |
+ *             +-----------------------------------------+
+ *              6       4 4    3 3  3 3  3 3            0
+ *              3       9 8    8 7  6 5  4 3            0
+ *
+ *		bits 63-49	Unused - must be zero
+ *		bits 48-38	Node number. Note that some configurations do NOT
+ *				have a node zero.
+ *		bits 37-36	Address space ID. Cached memory has a value of 3 (!!!).
+ *				Chipset & IO addresses have other values.
+ *				  (Yikes!! The hardware folks hate us...)
+ *		bits 35-0	Node offset.
+ *
+ *	The node offset can be further broken down as:
+ *		bits 35-34	Clump (bank) number.
+ *		bits 33-0	Clump (bank) offset.
+ *
+ *	A node consists of up to 4 clumps (banks) of memory. A clump may be empty, or may be
+ *	populated with a single contiguous block of memory starting at clump
+ *	offset 0. The size of the block is (2**n) * 64MB, where 0<n<9.
+ *
+ *	Important notes:
+ *		- IO space addresses are embedded with the range of valid memory addresses.
+ *		- All cached memory addresses have bits 36 & 37 set to 1's.
+ *		- There is no physical address 0.
+ *
+ * NOTE: This file exports symbols prefixed with "PLAT_". Symbols prefixed with
+ *	 "SN_" are intended for internal use only and should not be used in
+ *	 any platform independent code. 
+ *
+ *	 This file is also responsible for exporting the following definitions:
+ *		cnodeid_t	Define a compact node id. 
+ */
+
+typedef signed short cnodeid_t;
+
+#define SN2_BANKS_PER_NODE		4
+#define SN2_NODE_SIZE			(64UL*1024*1024*1024)	/* 64GB per node */
+#define SN2_BANK_SIZE			(SN2_NODE_SIZE/SN2_BANKS_PER_NODE)
+#define SN2_NODE_SHIFT			38
+#define SN2_NODE_MASK			0x7ffUL
+#define SN2_NODE_OFFSET_MASK		(SN2_NODE_SIZE-1)
+#define SN2_NODE_NUMBER(addr)		(((unsigned long)(addr) >> SN2_NODE_SHIFT) & SN2_NODE_MASK)
+#define SN2_NODE_CLUMP_NUMBER(kaddr)	(((unsigned long)(kaddr) >>34) & 3)
+#define SN2_NODE_OFFSET(addr)		(((unsigned long)(addr)) & SN2_NODE_OFFSET_MASK)
+#define SN2_KADDR(nasid, offset)	(((unsigned long)(nasid)<<SN2_NODE_SHIFT) | (offset) | SN2_PAGE_OFFSET)
+#define SN2_PAGE_OFFSET			0xe000003000000000UL      /* Cacheable memory space */
+
+
+#define PLAT_MAX_NODE_NUMBER		2048			/* Maximum node number + 1 */
+#define PLAT_MAX_COMPACT_NODES		128			/* Maximum number of nodes in SSI system */
+
+#define PLAT_MAX_PHYS_MEMORY		(1UL << 49)
+
+
+
+/*
+ * On the SN platforms, a clump is the same as a memory bank.
+ */
+#define PLAT_CLUMPS_PER_NODE		SN2_BANKS_PER_NODE
+#define PLAT_CLUMP_OFFSET(addr)		((unsigned long)(addr) & 0x3ffffffffUL)
+#define PLAT_CLUMPSIZE			(SN2_NODE_SIZE/PLAT_CLUMPS_PER_NODE)
+#define PLAT_MAXCLUMPS			(PLAT_CLUMPS_PER_NODE * PLAT_MAX_COMPACT_NODES)
+
+
+
+/*
+ * PLAT_VALID_MEM_KADDR returns a boolean to indicate if a kaddr is potentially a
+ * valid cacheable identity mapped RAM memory address.
+ * Note that the RAM may or may not actually be present!!
+ */
+#define SN2_VALID_KERN_ADDR_MASK	0xffff003000000000UL
+#define SN2_VALID_KERN_ADDR_VALUE	0xe000003000000000UL
+#define PLAT_VALID_MEM_KADDR(kaddr)	(((unsigned long)(kaddr) & SN2_VALID_KERN_ADDR_MASK) == SN2_VALID_KERN_ADDR_VALUE)
+
+
+
+/*
+ * Memory is conceptually divided into chunks. A chunk is either
+ * completely present, or else the kernel assumes it is completely
+ * absent. Each node consists of a number of possibly contiguous chunks.
+ */
+#define SN2_CHUNKSHIFT			25			/* 32 MB */
+#define PLAT_CHUNKSIZE			(1UL << SN2_CHUNKSHIFT)
+#define PLAT_CHUNKNUM(addr)		({unsigned long _p=(unsigned long)(addr);		\
+						(((_p&SN2_NODE_MASK)>>2) | 			\
+						(_p&SN2_NODE_OFFSET_MASK)) >>SN2_CHUNKSHIFT;})
+
+/*
+ * Given a kaddr, find the nid (compact nodeid)
+ */
+#ifdef CONFIG_IA64_SGI_SN_DEBUG
+#define DISCONBUG(kaddr)		panic("DISCONTIG BUG: line %d, %s. kaddr 0x%lx",	 	\
+						__LINE__, __FILE__, (long)(kaddr))
+
+#define KVADDR_TO_NID(kaddr)		({long _ktn=(long)(kaddr);					\
+						kern_addr_valid(_ktn) ? 				\
+						local_node_data->physical_node_map[SN2_NODE_NUMBER(_ktn)] :	\
+						(DISCONBUG(_ktn), 0UL);})
+#else
+#define KVADDR_TO_NID(kaddr)		(local_node_data->physical_node_map[SN2_NODE_NUMBER(kaddr)])
+#endif
+
+
+
+/*
+ * Given a kaddr, find the index into the clump_mem_map_base array of the page struct entry 
+ * for the first page of the clump.
+ */
+#define PLAT_CLUMP_MEM_MAP_INDEX(kaddr)		({long _kmmi=(long)(kaddr);				\
+							KVADDR_TO_NID(_kmmi) * PLAT_CLUMPS_PER_NODE +	\
+							SN2_NODE_CLUMP_NUMBER(_kmmi);})
+
+
+
+/*
+ * Calculate a "goal" value to be passed to __alloc_bootmem_node for allocating structures on
+ * nodes so that they dont alias to the same line in the cache as the previous allocated structure.
+ * This macro takes an address of the end of previous allocation, rounds it to a page boundary & 
+ * changes the node number.
+ */
+#define PLAT_BOOTMEM_ALLOC_GOAL(cnode,kaddr)	__pa(SN2_KADDR(PLAT_PXM_TO_PHYS_NODE_NUMBER(nid_to_pxm_map[cnode]),	       \
+						 (SN2_NODE_OFFSET(kaddr) + PAGE_SIZE - 1) >> PAGE_SHIFT << PAGE_SHIFT))
+
+
+
+
+/*
+ * Convert a proximity domain number (from the ACPI tables) into a physical node number.
+ *	Note: on SN2, the promity domain number is the same as bits [8:1] of the NASID. The following
+ *	algorithm relies on:
+ *		- bit 0 of the NASID for cpu nodes is always 0
+ *		- bits [10:9] of all NASIDs in a partition are always the same
+ *		- hard_smp_processor_id return the SAPIC of the current cpu &
+ *			bits 0..11 contain the NASID.
+ *
+ *	All of this complexity is because MS architectually limited proximity domain numbers to
+ *	8 bits. 
+ */
+
+#define PLAT_PXM_TO_PHYS_NODE_NUMBER(pxm)	(((pxm)<<1) | (hard_smp_processor_id() & 0x300))
+
+#endif /* _ASM_IA64_SN_MMZONE_SN2_H */