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Message-ID: <20080324182118.GA21758@sgi.com>
Date: Mon, 24 Mar 2008 13:21:18 -0500
From: Jack Steiner <steiner@....com>
To: mingo@...e.hu, tglx@...utronix.de
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: [RFC 6/8] x86_64: Define the macros and tables for the basic UV infrastructure.
Define the macros and tables for the basic UV infrastructure.
(NOTE: a work-in-progress. Pieces missing....)
Signed-off-by: Jack Steiner <steiner@....com>
---
include/asm-x86/uv_hub.h | 217 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 217 insertions(+)
Index: linux/include/asm-x86/uv_hub.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux/include/asm-x86/uv_hub.h 2008-03-21 15:48:18.000000000 -0500
@@ -0,0 +1,217 @@
+/*
+ * 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) 2007 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef __ASM_X86_UV_HUB_H__
+#define __ASM_X86_UV_HUB_H__
+
+#include <linux/numa.h>
+#include <linux/percpu.h>
+#include <asm/types.h>
+#include <asm/percpu.h>
+
+
+/*
+ * Addressing Terminology
+ *
+ * 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.
+ *
+ * SNASID - NASID right shifted by 1 bit.
+ *
+ *
+ * Memory/UV-HUB Processor Socket Address Format:
+ * +--------+---------------+---------------------+
+ * |00..0000| SNASID | NodeOffset |
+ * +--------+---------------+---------------------+
+ * <--- N bits --->|<--------M bits ----->
+ *
+ * M number of node offset bits (35 .. 40)
+ * N number of SNASID 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
+ *
+ * APICID format
+ * NOTE!!!!!! This is the current format of the APICID. However, code
+ * should assume that this will change in the future. Use functions
+ * in this file for all APICID bit manipulations and conversion.
+ *
+ * 1111110000000000
+ * 5432109876543210
+ * nnnnnnnnnnlc0cch
+ * sssssssssss
+ *
+ * n = snasid bits
+ * l = socket number on board
+ * c = core
+ * h = hyperthread
+ * s = bits that are in the socket CSR
+ *
+ * Note: Processor only supports 12 bits in the APICID register. The ACPI
+ * tables hold all 16 bits. Software needs to be aware of this.
+ *
+ * Unless otherwise specified, all references to APICID refer to
+ * the FULL value contained in ACPI tables, not the subset in the
+ * processor APICID register.
+ */
+
+
+/*
+ * 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 be 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 256
+
+/*
+ * 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 short local_nasid;
+ unsigned short gnode_upper;
+ 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))
+
+/* This header file is used in BIOS code that runs in physical mode */
+#ifdef __BIOS__
+#define UV_ADDR(x) ((unsigned long *)(x))
+#else
+#define UV_ADDR(x) ((unsigned long *)__va(x))
+#endif
+
+/*
+ * Local & Global MMR space macros.
+ * Note: macros are intended to be used ONLY by inline functions
+ * in this file - not by other kernel code.
+ */
+#define UV_SNASID(n) ((n) >> 1)
+#define UV_NASID(n) ((n) << 1)
+
+#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_SNASID_MASK 0x3ff
+#define UV_GLOBAL_MMR32_SNASID_SHIFT 15
+#define UV_GLOBAL_MMR64_SNASID_SHIFT 26
+
+#define UV_GLOBAL_MMR32_NASID_BITS(n) \
+ (((UV_SNASID(n) & UV_GLOBAL_MMR32_SNASID_MASK)) << \
+ (UV_GLOBAL_MMR32_SNASID_SHIFT))
+
+#define UV_GLOBAL_MMR64_NASID_BITS(n) \
+ ((unsigned long)UV_SNASID(n) << UV_GLOBAL_MMR64_SNASID_SHIFT)
+
+#define UV_APIC_NASID_SHIFT 7
+
+/*
+ * Extract a NASID from an APICID (full apicid, not processor subset)
+ */
+static inline int uv_apicid_to_nasid(int apicid)
+{
+ return (UV_NASID(apicid >> UV_APIC_NASID_SHIFT));
+}
+
+/*
+ * 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 nasid,
+ unsigned long offset)
+{
+ return UV_ADDR(UV_GLOBAL_MMR32_BASE |
+ UV_GLOBAL_MMR32_NASID_BITS(nasid) | offset);
+}
+
+static inline void uv_write_global_mmr32(int nasid, unsigned long offset,
+ unsigned long val)
+{
+ *uv_global_mmr32_address(nasid, offset) = val;
+}
+
+static inline unsigned long uv_read_global_mmr32(int nasid,
+ unsigned long offset)
+{
+ return *uv_global_mmr32_address(nasid, 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 nasid,
+ unsigned long offset)
+{
+ return UV_ADDR(UV_GLOBAL_MMR64_BASE |
+ UV_GLOBAL_MMR64_NASID_BITS(nasid) | offset);
+}
+
+static inline void uv_write_global_mmr64(int nasid, unsigned long offset,
+ unsigned long val)
+{
+ *uv_global_mmr64_address(nasid, offset) = val;
+}
+
+static inline unsigned long uv_read_global_mmr64(int nasid,
+ unsigned long offset)
+{
+ return *uv_global_mmr64_address(nasid, offset);
+}
+
+/*
+ * Access node 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 UV_ADDR(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;
+}
+
+#endif /* __ASM_X86_UV_HUB__ */
+
--
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