arch/ia64/uv/kernel/setup.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * SGI UV Core Functions
   7  *
   8  * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/percpu.h>
  13 #include <asm/sn/simulator.h>
  14 #include <asm/uv/uv_mmrs.h>
  15 #include <asm/uv/uv_hub.h>
  16
  17 DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  18 EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  19
  20
  21 struct redir_addr {
  22         unsigned long redirect;
  23         unsigned long alias;
  24 };
  25
  26 #define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
  27
  28 static __initdata struct redir_addr redir_addrs[] = {
  29         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
  30         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
  31         {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
  32 };
  33
  34 static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
  35 {
  36         union uvh_si_alias0_overlay_config_u alias;
  37         union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
  38         int i;
  39
  40         for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
  41                 alias.v = uv_read_local_mmr(redir_addrs[i].alias);
  42                 if (alias.s.base == 0) {
  43                         *size = (1UL << alias.s.m_alias);
  44                         redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
  45                         *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
  46                         return;
  47                 }
  48         }
  49         BUG();
  50 }
  51
  52 void __init uv_setup(char **cmdline_p)
  53 {
  54         union uvh_si_addr_map_config_u m_n_config;
  55         union uvh_node_id_u node_id;
  56         unsigned long gnode_upper;
  57         int nid, cpu, m_val, n_val;
  58         unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
  59
  60         if (IS_MEDUSA()) {
  61                 lowmem_redir_base = 0;
  62                 lowmem_redir_size = 0;
  63                 node_id.v = 0;
  64                 m_n_config.s.m_skt = 37;
  65                 m_n_config.s.n_skt = 0;
  66                 mmr_base = 0;
  67         } else {
  68                 get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
  69                 node_id.v = uv_read_local_mmr(UVH_NODE_ID);
  70                 m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
  71                 mmr_base =
  72                         uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
  73                                 ~UV_MMR_ENABLE;
  74         }
  75
  76         m_val = m_n_config.s.m_skt;
  77         n_val = m_n_config.s.n_skt;
  78         printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
  79
  80         gnode_upper = (((unsigned long)node_id.s.node_id) &
  81                        ~((1 << n_val) - 1)) << m_val;
  82
  83         for_each_present_cpu(cpu) {
  84                 nid = cpu_to_node(cpu);
  85                 uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
  86                 uv_cpu_hub_info(cpu)->lowmem_remap_top =
  87                         lowmem_redir_base + lowmem_redir_size;
  88                 uv_cpu_hub_info(cpu)->m_val = m_val;
  89                 uv_cpu_hub_info(cpu)->n_val = m_val;
  90                 uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
  91                 uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
  92                 uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
  93                 uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
  94                 uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
  95                 printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
  96         }
  97 }
  98