This source file includes following definitions.
- esi_init
- ia64_esi_call
- ia64_esi_call_phys
- esi_exit
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8 #include <linux/kernel.h>
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/string.h>
12
13 #include <asm/esi.h>
14 #include <asm/sal.h>
15
16 MODULE_AUTHOR("Alex Williamson <alex.williamson@hp.com>");
17 MODULE_DESCRIPTION("Extensible SAL Interface (ESI) support");
18 MODULE_LICENSE("GPL");
19
20 #define MODULE_NAME "esi"
21
22 #define ESI_TABLE_GUID \
23 EFI_GUID(0x43EA58DC, 0xCF28, 0x4b06, 0xB3, \
24 0x91, 0xB7, 0x50, 0x59, 0x34, 0x2B, 0xD4)
25
26 enum esi_systab_entry_type {
27 ESI_DESC_ENTRY_POINT = 0
28 };
29
30
31
32
33
34 #define ESI_DESC_SIZE(type) "\060"[(unsigned) (type)]
35
36 typedef struct ia64_esi_desc_entry_point {
37 u8 type;
38 u8 reserved1[15];
39 u64 esi_proc;
40 u64 gp;
41 efi_guid_t guid;
42 } ia64_esi_desc_entry_point_t;
43
44 struct pdesc {
45 void *addr;
46 void *gp;
47 };
48
49 static struct ia64_sal_systab *esi_systab;
50
51 static int __init esi_init (void)
52 {
53 efi_config_table_t *config_tables;
54 struct ia64_sal_systab *systab;
55 unsigned long esi = 0;
56 char *p;
57 int i;
58
59 config_tables = __va(efi.systab->tables);
60
61 for (i = 0; i < (int) efi.systab->nr_tables; ++i) {
62 if (efi_guidcmp(config_tables[i].guid, ESI_TABLE_GUID) == 0) {
63 esi = config_tables[i].table;
64 break;
65 }
66 }
67
68 if (!esi)
69 return -ENODEV;
70
71 systab = __va(esi);
72
73 if (strncmp(systab->signature, "ESIT", 4) != 0) {
74 printk(KERN_ERR "bad signature in ESI system table!");
75 return -ENODEV;
76 }
77
78 p = (char *) (systab + 1);
79 for (i = 0; i < systab->entry_count; i++) {
80
81
82
83
84 switch (*p) {
85 case ESI_DESC_ENTRY_POINT:
86 break;
87 default:
88 printk(KERN_WARNING "Unknown table type %d found in "
89 "ESI table, ignoring rest of table\n", *p);
90 return -ENODEV;
91 }
92
93 p += ESI_DESC_SIZE(*p);
94 }
95
96 esi_systab = systab;
97 return 0;
98 }
99
100
101 int ia64_esi_call (efi_guid_t guid, struct ia64_sal_retval *isrvp,
102 enum esi_proc_type proc_type, u64 func,
103 u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6,
104 u64 arg7)
105 {
106 struct ia64_fpreg fr[6];
107 unsigned long flags = 0;
108 int i;
109 char *p;
110
111 if (!esi_systab)
112 return -1;
113
114 p = (char *) (esi_systab + 1);
115 for (i = 0; i < esi_systab->entry_count; i++) {
116 if (*p == ESI_DESC_ENTRY_POINT) {
117 ia64_esi_desc_entry_point_t *esi = (void *)p;
118 if (!efi_guidcmp(guid, esi->guid)) {
119 ia64_sal_handler esi_proc;
120 struct pdesc pdesc;
121
122 pdesc.addr = __va(esi->esi_proc);
123 pdesc.gp = __va(esi->gp);
124
125 esi_proc = (ia64_sal_handler) &pdesc;
126
127 ia64_save_scratch_fpregs(fr);
128 if (proc_type == ESI_PROC_SERIALIZED)
129 spin_lock_irqsave(&sal_lock, flags);
130 else if (proc_type == ESI_PROC_MP_SAFE)
131 local_irq_save(flags);
132 else
133 preempt_disable();
134 *isrvp = (*esi_proc)(func, arg1, arg2, arg3,
135 arg4, arg5, arg6, arg7);
136 if (proc_type == ESI_PROC_SERIALIZED)
137 spin_unlock_irqrestore(&sal_lock,
138 flags);
139 else if (proc_type == ESI_PROC_MP_SAFE)
140 local_irq_restore(flags);
141 else
142 preempt_enable();
143 ia64_load_scratch_fpregs(fr);
144 return 0;
145 }
146 }
147 p += ESI_DESC_SIZE(*p);
148 }
149 return -1;
150 }
151 EXPORT_SYMBOL_GPL(ia64_esi_call);
152
153 int ia64_esi_call_phys (efi_guid_t guid, struct ia64_sal_retval *isrvp,
154 u64 func, u64 arg1, u64 arg2, u64 arg3, u64 arg4,
155 u64 arg5, u64 arg6, u64 arg7)
156 {
157 struct ia64_fpreg fr[6];
158 unsigned long flags;
159 u64 esi_params[8];
160 char *p;
161 int i;
162
163 if (!esi_systab)
164 return -1;
165
166 p = (char *) (esi_systab + 1);
167 for (i = 0; i < esi_systab->entry_count; i++) {
168 if (*p == ESI_DESC_ENTRY_POINT) {
169 ia64_esi_desc_entry_point_t *esi = (void *)p;
170 if (!efi_guidcmp(guid, esi->guid)) {
171 ia64_sal_handler esi_proc;
172 struct pdesc pdesc;
173
174 pdesc.addr = (void *)esi->esi_proc;
175 pdesc.gp = (void *)esi->gp;
176
177 esi_proc = (ia64_sal_handler) &pdesc;
178
179 esi_params[0] = func;
180 esi_params[1] = arg1;
181 esi_params[2] = arg2;
182 esi_params[3] = arg3;
183 esi_params[4] = arg4;
184 esi_params[5] = arg5;
185 esi_params[6] = arg6;
186 esi_params[7] = arg7;
187 ia64_save_scratch_fpregs(fr);
188 spin_lock_irqsave(&sal_lock, flags);
189 *isrvp = esi_call_phys(esi_proc, esi_params);
190 spin_unlock_irqrestore(&sal_lock, flags);
191 ia64_load_scratch_fpregs(fr);
192 return 0;
193 }
194 }
195 p += ESI_DESC_SIZE(*p);
196 }
197 return -1;
198 }
199 EXPORT_SYMBOL_GPL(ia64_esi_call_phys);
200
201 static void __exit esi_exit (void)
202 {
203 }
204
205 module_init(esi_init);
206 module_exit(esi_exit);