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_partition_id;
23EXPORT_SYMBOL(sn_partition_id);
24long sn_coherency_id;
25EXPORT_SYMBOL_GPL(sn_coherency_id);
26long sn_region_size;
27EXPORT_SYMBOL(sn_region_size);
28#endif
29
30struct redir_addr {
31	unsigned long redirect;
32	unsigned long alias;
33};
34
35#define DEST_SHIFT UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR_DEST_BASE_SHFT
36
37static __initdata struct redir_addr redir_addrs[] = {
38	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_0_MMR, UVH_SI_ALIAS0_OVERLAY_CONFIG},
39	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_1_MMR, UVH_SI_ALIAS1_OVERLAY_CONFIG},
40	{UVH_RH_GAM_ALIAS210_REDIRECT_CONFIG_2_MMR, UVH_SI_ALIAS2_OVERLAY_CONFIG},
41};
42
43static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
44{
45	union uvh_si_alias0_overlay_config_u alias;
46	union uvh_rh_gam_alias210_redirect_config_2_mmr_u redirect;
47	int i;
48
49	for (i = 0; i < ARRAY_SIZE(redir_addrs); i++) {
50		alias.v = uv_read_local_mmr(redir_addrs[i].alias);
51		if (alias.s.base == 0) {
52			*size = (1UL << alias.s.m_alias);
53			redirect.v = uv_read_local_mmr(redir_addrs[i].redirect);
54			*base = (unsigned long)redirect.s.dest_base << DEST_SHIFT;
55			return;
56		}
57	}
58	BUG();
59}
60
61void __init uv_setup(char **cmdline_p)
62{
63	union uvh_si_addr_map_config_u m_n_config;
64	union uvh_node_id_u node_id;
65	unsigned long gnode_upper;
66	int nid, cpu, m_val, n_val;
67	unsigned long mmr_base, lowmem_redir_base, lowmem_redir_size;
68
69	if (IS_MEDUSA()) {
70		lowmem_redir_base = 0;
71		lowmem_redir_size = 0;
72		node_id.v = 0;
73		m_n_config.s.m_skt = 37;
74		m_n_config.s.n_skt = 0;
75		mmr_base = 0;
76#if 0
77		/* Need BIOS calls - TDB */
78		if (!ia64_sn_is_fake_prom())
79			sn_prom_type = 1;
80		else
81#endif
82			sn_prom_type = 2;
83		printk(KERN_INFO "Running on medusa with %s PROM\n",
84					(sn_prom_type == 1) ? "real" : "fake");
85	} else {
86		get_lowmem_redirect(&lowmem_redir_base, &lowmem_redir_size);
87		node_id.v = uv_read_local_mmr(UVH_NODE_ID);
88		m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG);
89		mmr_base =
90			uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
91				~UV_MMR_ENABLE;
92	}
93
94	m_val = m_n_config.s.m_skt;
95	n_val = m_n_config.s.n_skt;
96	printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
97
98	gnode_upper = (((unsigned long)node_id.s.node_id) &
99		       ~((1 << n_val) - 1)) << m_val;
100
101	for_each_present_cpu(cpu) {
102		nid = cpu_to_node(cpu);
103		uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
104		uv_cpu_hub_info(cpu)->lowmem_remap_top =
105			lowmem_redir_base + lowmem_redir_size;
106		uv_cpu_hub_info(cpu)->m_val = m_val;
107		uv_cpu_hub_info(cpu)->n_val = n_val;
108		uv_cpu_hub_info(cpu)->pnode_mask = (1 << n_val) -1;
109		uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
110		uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
111		uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
112		uv_cpu_hub_info(cpu)->coherency_domain_number = 0;/* ZZZ */
113		printk(KERN_DEBUG "UV cpu %d, nid %d\n", cpu, nid);
114	}
115}
116
117