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