setup.c

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/*
 * 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 Core Functions
 *
 * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
 */

#include <linux/module.h>
#include <linux/percpu.h>
#include <asm/sn/simulator.h>
#include <asm/uv/uv_mmrs.h>
#include <asm/uv/uv_hub.h>

DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);
EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

#ifdef CONFIG_IA64_SGI_UV
int sn_prom_type;
long sn_partition_id;
EXPORT_SYMBOL(sn_partition_id);
long sn_coherency_id;
EXPORT_SYMBOL_GPL(sn_coherency_id);
long sn_region_size;
EXPORT_SYMBOL(sn_region_size);
#endif

struct redir_addr {
    unsigned long redirect;
    unsigned long alias;
};

#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT

static __initdata struct redir_addr redir_addrs[] = {
    {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
    {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
    {UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
};

static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
{
    union uvh_si_alias0_overlay_config_u alias;
    union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
    int i;

    for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
        alias.v = uv_read_local_mmr(redir_addrs[i].alias);
        if (alias.s.base == 0) {
            *size = (1UL << alias.s.m_alias);
            redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
            *base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
            return;
        }
    }
    BUG();
}

void __init uv_setup(char **cmdline_p)
{
    union uvh_si_addr_map_config_u m_n_config;
    union uvh_node_id_u node_id;
    unsigned long gnode_upper;
    int nid, cpu, m_val, n_val;
    unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;

    if (IS_MEDUSA()) {
        lowmem_redir_base = 0;
        lowmem_redir_size = 0;
        node_id.v = 0;
        m_n_config.s.m_skt = 37;
        m_n_config.s.n_skt = 0;
        mmr_base = 0;
#if 0
        /* Need BIOS calls - TDB */
        if (!ia64_sn_is_fake_prom())
            sn_prom_type = 1;
        else
#endif
            sn_prom_type = 2;
        printk(KERN_INFO "Running on medusa with %s PROM\n",
                    (sn_prom_type == 1) ? "real" : "fake");
    } else {
        get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
        node_id.v = uv_read_local_mmr(UVH_NODE_ID);
        m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
        mmr_base =
            uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
                ~UV_MMR_ENABLE;
    }

    m_val = m_n_config.s.m_skt;
    n_val = m_n_config.s.n_skt;
    printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

    gnode_upper = (((unsigned long)node_id.s.node_id) &
               ~((1 << n_val) - 1)) << m_val;

    for_each_present_cpu(cpu) {
        nid = cpu_to_node(cpu);
        uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
        uv_cpu_hub_info(cpu)->lowmem_remap_top =
            lowmem_redir_base + lowmem_redir_size;
        uv_cpu_hub_info(cpu)->m_val = m_val;
        uv_cpu_hub_info(cpu)->n_val = n_val;
        uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
        uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
        uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
        uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
        uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
        printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
    }
}