[IA64] machvec support for SGI UV platform
[linux-2.6.git] / 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