x86: define the macros and tables for the basic UV infrastructure.

Define the macros and tables for the basic UV infrastructure.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 210 insertions, 0 deletions

diff --git a/include/asm-x86/uv/uv_hub.h b/include/asm-x86/uv/uv_hub.h
new file mode 100644
index 000000000000..b4fcf9cf8951
--- /dev/null
+++ b/include/asm-x86/uv/uv_hub.h
@@ -0,0 +1,210 @@
+/*
+ * 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))
+
+/*
+ * 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     6
+
+/*
+ * 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 __va(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 __va(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 __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;
+}
+
+#endif /* __ASM_X86_UV_HUB__ */
+