x86, uv: update macros used by UV platform

Update the UV address macros to better describe the
fields of UV physical addresses. Improve comments
in the header files. Add additional MMR definitions.

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

1 files changed, 128 insertions, 60 deletions

diff --git a/include/asm-x86/uv/uv_hub.h b/include/asm-x86/uv/uv_hub.h
index 26b9240d1e23..65004881de5f 100644
--- a/include/asm-x86/uv/uv_hub.h
+++ b/include/asm-x86/uv/uv_hub.h
@@ -5,7 +5,7 @@
  *
  * SGI UV architectural definitions
  *
- * Copyright (C) 2007 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2008 Silicon Graphics, Inc. All rights reserved.
  */
 
 #ifndef __ASM_X86_UV_HUB_H__
@@ -20,26 +20,49 @@
 /*
  * 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.
+ *      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)..
  *
- *      SNASID - NASID right shifted by 1 bit.
+ *      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..0000|    SNASID     |      NodeOffset     |
- *  +--------+---------------+---------------------+
- *           <--- N bits --->|<--------M bits ----->
+ *  +----------------+---------------+---------------------+
+ *  |00..000000000000|   PNODE       |      NodeOffset     |
+ *  +----------------+---------------+---------------------+
+ *                   <--- N bits --->|<--------M bits ----->
  *
- *      M number of node offset bits (35 .. 40)
- *      N number of SNASID bits (0 .. 10)
+ *      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
+ *              boot time. M & N values are set by the hardware/BIOS at boot.
+ *
  *
  * APICID format
  *      NOTE!!!!!! This is the current format of the APICID. However, code
@@ -48,14 +71,14 @@
  *
  *              1111110000000000
  *              5432109876543210
- *              nnnnnnnnnnlc0cch
+ *              pppppppppplc0cch
  *              sssssssssss
  *
- *                      n  = snasid bits
+ *                      p  = pnode bits
  *                      l =  socket number on board
  *                      c  = core
  *                      h  = hyperthread
- *                      s  = bits that are in the socket CSR
+ *                      s  = bits that are in the SOCKET_ID 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.
@@ -74,7 +97,7 @@
  * 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.
+ * NOTE: a brick may contain 1 or 2 OS nodes. Don't get these confused.
  */
 #define UV_MAX_NUMALINK_BLADES  16384
 
@@ -96,8 +119,12 @@
  */
 struct uv_hub_info_s {
         unsigned long   global_mmr_base;
-        unsigned short  local_nasid;
-        unsigned short  gnode_upper;
+        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;
@@ -112,83 +139,124 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  * 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_SNASID(n)                    ((n) >> 1)
-#define UV_NASID(n)                     ((n) << 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_SNASID_MASK     0x3ff
-#define UV_GLOBAL_MMR32_SNASID_SHIFT    15
-#define UV_GLOBAL_MMR64_SNASID_SHIFT    26
+#define UV_GLOBAL_MMR32_PNODE_SHIFT     15
+#define UV_GLOBAL_MMR64_PNODE_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_MMR32_PNODE_BITS(p)   ((p) << (UV_GLOBAL_MMR32_PNODE_SHIFT))
 
-#define UV_GLOBAL_MMR64_NASID_BITS(n)                                   \
-        ((unsigned long)UV_SNASID(n) << UV_GLOBAL_MMR64_SNASID_SHIFT)
+#define UV_GLOBAL_MMR64_PNODE_BITS(p)                                   \
+        ((unsigned long)(p) << UV_GLOBAL_MMR64_PNODE_SHIFT)
+
+#define UV_APIC_PNODE_SHIFT     6
+
+/*
+ * 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);
+}
 
-#define UV_APIC_NASID_SHIFT     6
 
 /*
- * Extract a NASID from an APICID (full apicid, not processor subset)
+ * Extract a PNODE from an APICID (full apicid, not processor subset)
  */
-static inline int uv_apicid_to_nasid(int apicid)
+static inline int uv_apicid_to_pnode(int apicid)
 {
-        return (UV_NASID(apicid >> UV_APIC_NASID_SHIFT));
+        return (apicid >> UV_APIC_PNODE_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,
+static inline unsigned long *uv_global_mmr32_address(int pnode,
                                 unsigned long offset)
 {
         return __va(UV_GLOBAL_MMR32_BASE |
-                       UV_GLOBAL_MMR32_NASID_BITS(nasid) | offset);
+                       UV_GLOBAL_MMR32_PNODE_BITS(pnode) | offset);
 }
 
-static inline void uv_write_global_mmr32(int nasid, unsigned long offset,
+static inline void uv_write_global_mmr32(int pnode, unsigned long offset,
                                  unsigned long val)
 {
-        *uv_global_mmr32_address(nasid, offset) = val;
+        *uv_global_mmr32_address(pnode, offset) = val;
 }
 
-static inline unsigned long uv_read_global_mmr32(int nasid,
+static inline unsigned long uv_read_global_mmr32(int pnode,
                                                  unsigned long offset)
 {
-        return *uv_global_mmr32_address(nasid, 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 nasid,
+static inline unsigned long *uv_global_mmr64_address(int pnode,
                                 unsigned long offset)
 {
         return __va(UV_GLOBAL_MMR64_BASE |
-                       UV_GLOBAL_MMR64_NASID_BITS(nasid) | offset);
+                    UV_GLOBAL_MMR64_PNODE_BITS(pnode) | offset);
 }
 
-static inline void uv_write_global_mmr64(int nasid, unsigned long offset,
+static inline void uv_write_global_mmr64(int pnode, unsigned long offset,
                                 unsigned long val)
 {
-        *uv_global_mmr64_address(nasid, offset) = val;
+        *uv_global_mmr64_address(pnode, offset) = val;
 }
 
-static inline unsigned long uv_read_global_mmr64(int nasid,
+static inline unsigned long uv_read_global_mmr64(int pnode,
                                                  unsigned long offset)
 {
-        return *uv_global_mmr64_address(nasid, offset);
+        return *uv_global_mmr64_address(pnode, offset);
 }
 
 /*
- * Access node local MMRs. Faster than using global space but only local MMRs
+ * 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)
@@ -207,15 +275,15 @@ static inline void uv_write_local_mmr(unsigned long offset, unsigned long val)
 }
 
 /*
- * Structures and definitions for converting between cpu, node, and blade
+ * Structures and definitions for converting between cpu, node, pnode, and blade
  * numbers.
  */
 struct uv_blade_info {
-        unsigned short  nr_posible_cpus;
+        unsigned short  nr_possible_cpus;
         unsigned short  nr_online_cpus;
-        unsigned short  nasid;
+        unsigned short  pnode;
 };
-struct uv_blade_info *uv_blade_info;
+extern struct uv_blade_info *uv_blade_info;
 extern short *uv_node_to_blade;
 extern short *uv_cpu_to_blade;
 extern short uv_possible_blades;
@@ -244,16 +312,16 @@ static inline int uv_node_to_blade_id(int nid)
         return uv_node_to_blade[nid];
 }
 
-/* Convert a blade id to the NASID of the blade */
-static inline int uv_blade_to_nasid(int bid)
+/* Convert a blade id to the PNODE of the blade */
+static inline int uv_blade_to_pnode(int bid)
 {
-        return uv_blade_info[bid].nasid;
+        return uv_blade_info[bid].pnode;
 }
 
 /* Determine the number of possible cpus on a blade */
 static inline int uv_blade_nr_possible_cpus(int bid)
 {
-        return uv_blade_info[bid].nr_posible_cpus;
+        return uv_blade_info[bid].nr_possible_cpus;
 }
 
 /* Determine the number of online cpus on a blade */
@@ -262,16 +330,16 @@ static inline int uv_blade_nr_online_cpus(int bid)
         return uv_blade_info[bid].nr_online_cpus;
 }
 
-/* Convert a cpu id to the NASID of the blade containing the cpu */
-static inline int uv_cpu_to_nasid(int cpu)
+/* Convert a cpu id to the PNODE of the blade containing the cpu */
+static inline int uv_cpu_to_pnode(int cpu)
 {
-        return uv_blade_info[uv_cpu_to_blade_id(cpu)].nasid;
+        return uv_blade_info[uv_cpu_to_blade_id(cpu)].pnode;
 }
 
-/* Convert a node number to the NASID of the blade */
-static inline int uv_node_to_nasid(int nid)
+/* Convert a linux node number to the PNODE of the blade */
+static inline int uv_node_to_pnode(int nid)
 {
-        return uv_blade_info[uv_node_to_blade_id(nid)].nasid;
+        return uv_blade_info[uv_node_to_blade_id(nid)].pnode;
 }
 
 /* Maximum possible number of blades */