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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/ia64/uv/kernel/setup.c
15118 views
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/*

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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 Core Functions

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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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#include <linux/module.h>

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#include <linux/percpu.h>

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#include <asm/sn/simulator.h>

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#include <asm/uv/uv_mmrs.h>

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#include <asm/uv/uv_hub.h>

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DEFINE_PER_CPU(struct uv_hub_info_s, __uv_hub_info);

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EXPORT_PER_CPU_SYMBOL_GPL(__uv_hub_info);

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#ifdef CONFIG_IA64_SGI_UV

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int sn_prom_type;

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long sn_partition_id;

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EXPORT_SYMBOL(sn_partition_id);

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long sn_coherency_id;

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EXPORT_SYMBOL_GPL(sn_coherency_id);

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long sn_region_size;

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EXPORT_SYMBOL(sn_region_size);

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#endif

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struct redir_addr {

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	unsigned long redirect;

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	unsigned long alias;

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};

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#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT

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static __initdata struct redir_addr redir_addrs[] = {

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	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},

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	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},

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	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},

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};

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static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)

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{

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	union uvh_si_alias0_overlay_config_u alias;

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	union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;

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	int i;

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	for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {

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		alias.v = uv_read_local_mmr(redir_addrs[i].alias);

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		if (alias.s.base == 0) {

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			*size = (1UL << alias.s.m_alias);

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			redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);

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			*base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;

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			return;

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		}

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	}

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	BUG();

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}

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void __init uv_setup(char **cmdline_p)

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{

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	union uvh_si_addr_map_config_u m_n_config;

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	union uvh_node_id_u node_id;

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	unsigned long gnode_upper;

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	int nid, cpu, m_val, n_val;

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	unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;

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	if (IS_MEDUSA()) {

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		lowmem_redir_base = 0;

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		lowmem_redir_size = 0;

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		node_id.v = 0;

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		m_n_config.s.m_skt = 37;

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		m_n_config.s.n_skt = 0;

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		mmr_base = 0;

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#if 0

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		/* Need BIOS calls - TDB */

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		if (!ia64_sn_is_fake_prom())

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			sn_prom_type = 1;

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		else

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#endif

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			sn_prom_type = 2;

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		printk(KERN_INFO "Running on medusa with %s PROM\n",

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					(sn_prom_type == 1) ? "real" : "fake");

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	} else {

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		get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);

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		node_id.v = uv_read_local_mmr(UVH_NODE_ID);

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		m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);

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		mmr_base =

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			uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &

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				~UV_MMR_ENABLE;

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	}

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	m_val = m_n_config.s.m_skt;

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	n_val = m_n_config.s.n_skt;

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	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);

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	gnode_upper = (((unsigned long)node_id.s.node_id) &

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		       ~((1 << n_val) - 1)) << m_val;

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	for_each_present_cpu(cpu) {

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		nid = cpu_to_node(cpu);

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		uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;

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		uv_cpu_hub_info(cpu)->lowmem_remap_top =

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			lowmem_redir_base + lowmem_redir_size;

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		uv_cpu_hub_info(cpu)->m_val = m_val;

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		uv_cpu_hub_info(cpu)->n_val = n_val;

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		uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;

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		uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;

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		uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;

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		uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;

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		uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */

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		printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);

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	}

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}

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