[IA64] Add header files for SGI UV platform

Add new UV-specific header files.
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

include/asm-ia64/uv/uv_hub.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.
+ *
+ * SGI UV architectural definitions
+ *
+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef __ASM_IA64_UV_HUB_H__
+#define __ASM_IA64_UV_HUB_H__
+
+#include <linux/numa.h>
+#include <linux/percpu.h>
+#include <asm/types.h>
+#include <asm/percpu.h>
+
+
+/*
+ * Addressing Terminology
+ *
+ *	M       - The low M bits of a physical address represent the offset
+ *		  into the blade local memory. RAM memory on a blade is physically
+ *		  contiguous (although various IO spaces may punch holes in
+ *		  it)..
+ *
+ * 	N	- Number of bits in the node portion of a socket physical
+ * 		  address.
+ *
+ * 	NASID   - network ID of a router, Mbrick or Cbrick. Nasid values of
+ * 	 	  routers always have low bit of 1, C/MBricks have low bit
+ * 		  equal to 0. Most addressing macros that target UV hub chips
+ * 		  right shift the NASID by 1 to exclude the always-zero bit.
+ * 		  NASIDs contain up to 15 bits.
+ *
+ *	GNODE   - NASID right shifted by 1 bit. Most mmrs contain gnodes instead
+ *		  of nasids.
+ *
+ * 	PNODE   - the low N bits of the GNODE. The PNODE is the most useful variant
+ * 		  of the nasid for socket usage.
+ *
+ *
+ *  NumaLink Global Physical Address Format:
+ *  +--------------------------------+---------------------+
+ *  |00..000|      GNODE             |      NodeOffset     |
+ *  +--------------------------------+---------------------+
+ *          |<-------53 - M bits --->|<--------M bits ----->
+ *
+ *	M - number of node offset bits (35 .. 40)
+ *
+ *
+ *  Memory/UV-HUB Processor Socket Address Format:
+ *  +----------------+---------------+---------------------+
+ *  |00..000000000000|   PNODE       |      NodeOffset     |
+ *  +----------------+---------------+---------------------+
+ *                   <--- N bits --->|<--------M bits ----->
+ *
+ *	M - number of node offset bits (35 .. 40)
+ *	N - number of PNODE bits (0 .. 10)
+ *
+ *		Note: M + N cannot currently exceed 44 (x86_64) or 46 (IA64).
+ *		The actual values are configuration dependent and are set at
+ *		boot time. M & N values are set by the hardware/BIOS at boot.
+ */
+
+
+/*
+ * Maximum number of bricks in all partitions and in all coherency domains.
+ * This is the total number of bricks accessible in the numalink fabric. It
+ * includes all C & M bricks. Routers are NOT included.
+ *
+ * This value is also the value of the maximum number of non-router NASIDs
+ * in the numalink fabric.
+ *
+ * NOTE: a brick may contain 1 or 2 OS nodes. Don't get these confused.
+ */
+#define UV_MAX_NUMALINK_BLADES	16384
+
+/*
+ * Maximum number of C/Mbricks within a software SSI (hardware may support
+ * more).
+ */
+#define UV_MAX_SSI_BLADES	1
+
+/*
+ * The largest possible NASID of a C or M brick (+ 2)
+ */
+#define UV_MAX_NASID_VALUE	(UV_MAX_NUMALINK_NODES * 2)
+
+/*
+ * The following defines attributes of the HUB chip. These attributes are
+ * frequently referenced and are kept in the per-cpu data areas of each cpu.
+ * They are kept together in a struct to minimize cache misses.
+ */
+struct uv_hub_info_s {
+	unsigned long	global_mmr_base;
+	unsigned long	gpa_mask;
+	unsigned long	gnode_upper;
+	unsigned long	lowmem_remap_top;
+	unsigned long	lowmem_remap_base;
+	unsigned short	pnode;
+	unsigned short	pnode_mask;
+	unsigned short	coherency_domain_number;
+	unsigned short	numa_blade_id;
+	unsigned char	blade_processor_id;
+	unsigned char	m_val;
+	unsigned char	n_val;
+};
+DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
+#define uv_hub_info 		(&__get_cpu_var(__uv_hub_info))
+#define uv_cpu_hub_info(cpu)	(&per_cpu(__uv_hub_info, cpu))
+
+/*
+ * Local & Global MMR space macros.
+ * 	Note: macros are intended to be used ONLY by inline functions
+ * 	in this file - not by other kernel code.
+ * 		n -  NASID (full 15-bit global nasid)
+ * 		g -  GNODE (full 15-bit global nasid, right shifted 1)
+ * 		p -  PNODE (local part of nsids, right shifted 1)
+ */
+#define UV_NASID_TO_PNODE(n)		(((n) >> 1) & uv_hub_info->pnode_mask)
+#define UV_PNODE_TO_NASID(p)		(((p) << 1) | uv_hub_info->gnode_upper)
+
+#define UV_LOCAL_MMR_BASE		0xf4000000UL
+#define UV_GLOBAL_MMR32_BASE		0xf8000000UL
+#define UV_GLOBAL_MMR64_BASE		(uv_hub_info->global_mmr_base)
+
+#define UV_GLOBAL_MMR32_PNODE_SHIFT	15
+#define UV_GLOBAL_MMR64_PNODE_SHIFT	26
+
+#define UV_GLOBAL_MMR32_PNODE_BITS(p)	((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))
+
+#define UV_GLOBAL_MMR64_PNODE_BITS(p)					\
+	((unsigned long)(p) << UV_GLOBAL_MMR64_PNODE_SHIFT)
+
+/*
+ * Macros for converting between kernel virtual addresses, socket local physical
+ * addresses, and UV global physical addresses.
+ * 	Note: use the standard __pa() & __va() macros for converting
+ * 	      between socket virtual and socket physical addresses.
+ */
+
+/* socket phys RAM --> UV global physical address */
+static inline unsigned long uv_soc_phys_ram_to_gpa(unsigned long paddr)
+{
+	if (paddr < uv_hub_info->lowmem_remap_top)
+		paddr += uv_hub_info->lowmem_remap_base;
+	return paddr | uv_hub_info->gnode_upper;
+}
+
+
+/* socket virtual --> UV global physical address */
+static inline unsigned long uv_gpa(void *v)
+{
+	return __pa(v) | uv_hub_info->gnode_upper;
+}
+
+/* socket virtual --> UV global physical address */
+static inline void *uv_vgpa(void *v)
+{
+	return (void *)uv_gpa(v);
+}
+
+/* UV global physical address --> socket virtual */
+static inline void *uv_va(unsigned long gpa)
+{
+	return __va(gpa & uv_hub_info->gpa_mask);
+}
+
+/* pnode, offset --> socket virtual */
+static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
+{
+	return __va(((unsigned long)pnode << uv_hub_info->m_val) | offset);
+}
+
+
+/*
+ * Access global MMRs using the low memory MMR32 space. This region supports
+ * faster MMR access but not all MMRs are accessible in this space.
+ */
+static inline unsigned long *uv_global_mmr32_address(int pnode,
+				unsigned long offset)
+{
+	return __va(UV_GLOBAL_MMR32_BASE |
+		       UV_GLOBAL_MMR32_PNODE_BITS(pnode) | offset);
+}
+
+static inline void uv_write_global_mmr32(int pnode, unsigned long offset,
+				 unsigned long val)
+{
+	*uv_global_mmr32_address(pnode, offset) = val;
+}
+
+static inline unsigned long uv_read_global_mmr32(int pnode,
+						 unsigned long offset)
+{
+	return *uv_global_mmr32_address(pnode, offset);
+}
+
+/*
+ * Access Global MMR space using the MMR space located at the top of physical
+ * memory.
+ */
+static inline unsigned long *uv_global_mmr64_address(int pnode,
+				unsigned long offset)
+{
+	return __va(UV_GLOBAL_MMR64_BASE |
+		    UV_GLOBAL_MMR64_PNODE_BITS(pnode) | offset);
+}
+
+static inline void uv_write_global_mmr64(int pnode, unsigned long offset,
+				unsigned long val)
+{
+	*uv_global_mmr64_address(pnode, offset) = val;
+}
+
+static inline unsigned long uv_read_global_mmr64(int pnode,
+						 unsigned long offset)
+{
+	return *uv_global_mmr64_address(pnode, offset);
+}
+
+/*
+ * Access hub local MMRs. Faster than using global space but only local MMRs
+ * are accessible.
+ */
+static inline unsigned long *uv_local_mmr_address(unsigned long offset)
+{
+	return __va(UV_LOCAL_MMR_BASE | offset);
+}
+
+static inline unsigned long uv_read_local_mmr(unsigned long offset)
+{
+	return *uv_local_mmr_address(offset);
+}
+
+static inline void uv_write_local_mmr(unsigned long offset, unsigned long val)
+{
+	*uv_local_mmr_address(offset) = val;
+}
+
+/*
+ * Structures and definitions for converting between cpu, node, pnode, and blade
+ * numbers.
+ */
+
+/* Blade-local cpu number of current cpu. Numbered 0 .. <# cpus on the blade> */
+static inline int uv_blade_processor_id(void)
+{
+	return smp_processor_id();
+}
+
+/* Blade number of current cpu. Numnbered 0 .. <#blades -1> */
+static inline int uv_numa_blade_id(void)
+{
+	return 0;
+}
+
+/* Convert a cpu number to the the UV blade number */
+static inline int uv_cpu_to_blade_id(int cpu)
+{
+	return 0;
+}
+
+/* Convert linux node number to the UV blade number */
+static inline int uv_node_to_blade_id(int nid)
+{
+	return 0;
+}
+
+/* Convert a blade id to the PNODE of the blade */
+static inline int uv_blade_to_pnode(int bid)
+{
+	return 0;
+}
+
+/* Determine the number of possible cpus on a blade */
+static inline int uv_blade_nr_possible_cpus(int bid)
+{
+	return num_possible_cpus();
+}
+
+/* Determine the number of online cpus on a blade */
+static inline int uv_blade_nr_online_cpus(int bid)
+{
+	return num_online_cpus();
+}
+
+/* Convert a cpu id to the PNODE of the blade containing the cpu */
+static inline int uv_cpu_to_pnode(int cpu)
+{
+	return 0;
+}
+
+/* Convert a linux node number to the PNODE of the blade */
+static inline int uv_node_to_pnode(int nid)
+{
+	return 0;
+}
+
+/* Maximum possible number of blades */
+static inline int uv_num_possible_blades(void)
+{
+	return 1;
+}
+
+#endif /* __ASM_IA64_UV_HUB__ */
+