LXR linux/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
  17DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
  18EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);
  19
  20#ifdef CONFIG_IA64_SGI_UV
  21int sn_prom_type;
  22long sn_coherency_id;
  23EXPORT_SYMBOL_GPL(sn_coherency_id);
  24#endif
  25
  26struct redir_addr {
  27        unsigned long redirect;
  28        unsigned long alias;
  29};
  30
  31#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
  32
  33static __initdata struct redir_addr redir_addrs[] = {
  34        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
  35        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
  36        {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
  37};
  38
  39static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
  40{
  41        union uvh_si_alias0_overlay_config_u alias;
  42        union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
  43        int i;
  44
  45        for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
  46                alias.v = uv_read_local_mmr(redir_addrs[i].alias);
  47                if (alias.s.base == 0) {
  48                        *size = (1UL << alias.s.m_alias);
  49                        redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
  50                        *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
  51                        return;
  52                }
  53        }
  54        BUG();
  55}
  56
  57void __init uv_setup(char **cmdline_p)
  58{
  59        union uvh_si_addr_map_config_u m_n_config;
  60        union uvh_node_id_u node_id;
  61        unsigned long gnode_upper;
  62        int nid, cpu, m_val, n_val;
  63        unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
  64
  65        if (IS_MEDUSA()) {
  66                lowmem_redir_base = 0;
  67                lowmem_redir_size = 0;
  68                node_id.v = 0;
  69                m_n_config.s.m_skt = 37;
  70                m_n_config.s.n_skt = 0;
  71                mmr_base = 0;
  72#if 0
  73                /* Need BIOS calls - TDB */
  74                if (!ia64_sn_is_fake_prom())
  75                        sn_prom_type = 1;
  76                else
  77#endif
  78                        sn_prom_type = 2;
  79                printk(KERN_INFO "Running on medusa with %s PROM\n",
  80                                        (sn_prom_type == 1) ? "real" : "fake");
  81        } else {
  82                get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
  83                node_id.v = uv_read_local_mmr(UVH_NODE_ID);
  84                m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
  85                mmr_base =
  86                        uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
  87                                ~UV_MMR_ENABLE;
  88        }
  89
  90        m_val = m_n_config.s.m_skt;
  91        n_val = m_n_config.s.n_skt;
  92        printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
  93
  94        gnode_upper = (((unsigned long)node_id.s.node_id) &
  95                       ~((1 << n_val) - 1)) << m_val;
  96
  97        for_each_present_cpu(cpu) {
  98                nid = cpu_to_node(cpu);
  99                uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
 100                uv_cpu_hub_info(cpu)->lowmem_remap_top =
 101                        lowmem_redir_base + lowmem_redir_size;
 102                uv_cpu_hub_info(cpu)->m_val = m_val;
 103                uv_cpu_hub_info(cpu)->n_val = n_val;
 104                uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
 105                uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
 106                uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
 107                uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
 108                uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
 109                printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
 110        }
 111}
 112
 113