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22#include <linux/efi.h>
23#include <linux/export.h>
24#include <asm/efi.h>
25#include <linux/io.h>
26#include <asm/uv/bios.h>
27#include <asm/uv/uv_hub.h>
28
29static struct uv_systab uv_systab;
30
31s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
32{
33 struct uv_systab *tab = &uv_systab;
34 s64 ret;
35
36 if (!tab->function)
37
38
39
40 return BIOS_STATUS_UNIMPLEMENTED;
41
42 ret = efi_call((void *)__va(tab->function), (u64)which,
43 a1, a2, a3, a4, a5);
44 return ret;
45}
46EXPORT_SYMBOL_GPL(uv_bios_call);
47
48s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
49 u64 a4, u64 a5)
50{
51 unsigned long bios_flags;
52 s64 ret;
53
54 local_irq_save(bios_flags);
55 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
56 local_irq_restore(bios_flags);
57
58 return ret;
59}
60
61s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
62 u64 a4, u64 a5)
63{
64 s64 ret;
65
66 preempt_disable();
67 ret = uv_bios_call(which, a1, a2, a3, a4, a5);
68 preempt_enable();
69
70 return ret;
71}
72
73
74long sn_partition_id;
75EXPORT_SYMBOL_GPL(sn_partition_id);
76long sn_coherency_id;
77EXPORT_SYMBOL_GPL(sn_coherency_id);
78long sn_region_size;
79EXPORT_SYMBOL_GPL(sn_region_size);
80long system_serial_number;
81EXPORT_SYMBOL_GPL(system_serial_number);
82int uv_type;
83EXPORT_SYMBOL_GPL(uv_type);
84
85
86s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
87 long *region, long *ssn)
88{
89 s64 ret;
90 u64 v0, v1;
91 union partition_info_u part;
92
93 ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
94 (u64)(&v0), (u64)(&v1), 0, 0);
95 if (ret != BIOS_STATUS_SUCCESS)
96 return ret;
97
98 part.val = v0;
99 if (uvtype)
100 *uvtype = part.hub_version;
101 if (partid)
102 *partid = part.partition_id;
103 if (coher)
104 *coher = part.coherence_id;
105 if (region)
106 *region = part.region_size;
107 if (ssn)
108 *ssn = v1;
109 return ret;
110}
111EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
112
113int
114uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
115 unsigned long *intr_mmr_offset)
116{
117 u64 watchlist;
118 s64 ret;
119
120
121
122
123 ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
124 mq_size, (u64)intr_mmr_offset,
125 (u64)&watchlist, 0);
126 if (ret < BIOS_STATUS_SUCCESS)
127 return ret;
128
129 return watchlist;
130}
131EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
132
133int
134uv_bios_mq_watchlist_free(int blade, int watchlist_num)
135{
136 return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
137 blade, watchlist_num, 0, 0, 0);
138}
139EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
140
141s64
142uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
143{
144 return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
145 perms, 0, 0);
146}
147EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
148
149s64
150uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
151{
152 s64 ret;
153
154 ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
155 (u64)addr, buf, (u64)len, 0);
156 return ret;
157}
158EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
159
160s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
161{
162 return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
163 (u64)ticks_per_second, 0, 0, 0);
164}
165EXPORT_SYMBOL_GPL(uv_bios_freq_base);
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178
179int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
180{
181 return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
182 (u64)decode, (u64)domain, (u64)bus, 0, 0);
183}
184EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
185
186
187#ifdef CONFIG_EFI
188void uv_bios_init(void)
189{
190 struct uv_systab *tab;
191
192 if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
193 (efi.uv_systab == (unsigned long)NULL)) {
194 printk(KERN_CRIT "No EFI UV System Table.\n");
195 uv_systab.function = (unsigned long)NULL;
196 return;
197 }
198
199 tab = (struct uv_systab *)ioremap(efi.uv_systab,
200 sizeof(struct uv_systab));
201 if (strncmp(tab->signature, "UVST", 4) != 0)
202 printk(KERN_ERR "bad signature in UV system table!");
203
204
205
206
207 memcpy(&uv_systab, tab, sizeof(struct uv_systab));
208 iounmap(tab);
209
210 printk(KERN_INFO "EFI UV System Table Revision %d\n",
211 uv_systab.revision);
212}
213#else
214
215void uv_bios_init(void) { }
216#endif
217