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1ff730b5 | 1 | /****************************************************************************** |
1ff730b5 IY |
2 | * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> |
3 | * VA Linux Systems Japan K.K. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | * | |
19 | */ | |
20 | ||
21 | #ifndef _ASM_IA64_PARAVIRT_PRIVOP_H | |
22 | #define _ASM_IA64_PARAVIRT_PRIVOP_H | |
23 | ||
24 | #ifdef CONFIG_PARAVIRT | |
25 | ||
26 | #ifndef __ASSEMBLY__ | |
27 | ||
28 | #include <linux/types.h> | |
29 | #include <asm/kregs.h> /* for IA64_PSR_I */ | |
30 | ||
31 | /****************************************************************************** | |
32 | * replacement of intrinsics operations. | |
33 | */ | |
34 | ||
35 | struct pv_cpu_ops { | |
36 | void (*fc)(unsigned long addr); | |
37 | unsigned long (*thash)(unsigned long addr); | |
38 | unsigned long (*get_cpuid)(int index); | |
39 | unsigned long (*get_pmd)(int index); | |
40 | unsigned long (*getreg)(int reg); | |
41 | void (*setreg)(int reg, unsigned long val); | |
42 | void (*ptcga)(unsigned long addr, unsigned long size); | |
43 | unsigned long (*get_rr)(unsigned long index); | |
44 | void (*set_rr)(unsigned long index, unsigned long val); | |
45 | void (*set_rr0_to_rr4)(unsigned long val0, unsigned long val1, | |
46 | unsigned long val2, unsigned long val3, | |
47 | unsigned long val4); | |
48 | void (*ssm_i)(void); | |
49 | void (*rsm_i)(void); | |
50 | unsigned long (*get_psr_i)(void); | |
51 | void (*intrin_local_irq_restore)(unsigned long flags); | |
52 | }; | |
53 | ||
54 | extern struct pv_cpu_ops pv_cpu_ops; | |
55 | ||
56 | extern void ia64_native_setreg_func(int regnum, unsigned long val); | |
57 | extern unsigned long ia64_native_getreg_func(int regnum); | |
58 | ||
59 | /************************************************/ | |
60 | /* Instructions paravirtualized for performance */ | |
61 | /************************************************/ | |
62 | ||
63 | /* mask for ia64_native_ssm/rsm() must be constant.("i" constraing). | |
64 | * static inline function doesn't satisfy it. */ | |
65 | #define paravirt_ssm(mask) \ | |
66 | do { \ | |
67 | if ((mask) == IA64_PSR_I) \ | |
68 | pv_cpu_ops.ssm_i(); \ | |
69 | else \ | |
70 | ia64_native_ssm(mask); \ | |
71 | } while (0) | |
72 | ||
73 | #define paravirt_rsm(mask) \ | |
74 | do { \ | |
75 | if ((mask) == IA64_PSR_I) \ | |
76 | pv_cpu_ops.rsm_i(); \ | |
77 | else \ | |
78 | ia64_native_rsm(mask); \ | |
79 | } while (0) | |
80 | ||
93fe10b6 IY |
81 | /* returned ip value should be the one in the caller, |
82 | * not in __paravirt_getreg() */ | |
83 | #define paravirt_getreg(reg) \ | |
84 | ({ \ | |
85 | unsigned long res; \ | |
86 | BUILD_BUG_ON(!__builtin_constant_p(reg)); \ | |
87 | if ((reg) == _IA64_REG_IP) \ | |
88 | res = ia64_native_getreg(_IA64_REG_IP); \ | |
89 | else \ | |
90 | res = pv_cpu_ops.getreg(reg); \ | |
91 | res; \ | |
92 | }) | |
93 | ||
4df8d22b IY |
94 | /****************************************************************************** |
95 | * replacement of hand written assembly codes. | |
96 | */ | |
97 | struct pv_cpu_asm_switch { | |
98 | unsigned long switch_to; | |
99 | unsigned long leave_syscall; | |
100 | unsigned long work_processed_syscall; | |
101 | unsigned long leave_kernel; | |
102 | }; | |
103 | void paravirt_cpu_asm_init(const struct pv_cpu_asm_switch *cpu_asm_switch); | |
104 | ||
1ff730b5 IY |
105 | #endif /* __ASSEMBLY__ */ |
106 | ||
4df8d22b IY |
107 | #define IA64_PARAVIRT_ASM_FUNC(name) paravirt_ ## name |
108 | ||
1ff730b5 IY |
109 | #else |
110 | ||
111 | /* fallback for native case */ | |
4df8d22b | 112 | #define IA64_PARAVIRT_ASM_FUNC(name) ia64_native_ ## name |
1ff730b5 IY |
113 | |
114 | #endif /* CONFIG_PARAVIRT */ | |
115 | ||
4df8d22b IY |
116 | /* these routines utilize privilege-sensitive or performance-sensitive |
117 | * privileged instructions so the code must be replaced with | |
118 | * paravirtualized versions */ | |
119 | #define ia64_switch_to IA64_PARAVIRT_ASM_FUNC(switch_to) | |
120 | #define ia64_leave_syscall IA64_PARAVIRT_ASM_FUNC(leave_syscall) | |
121 | #define ia64_work_processed_syscall \ | |
122 | IA64_PARAVIRT_ASM_FUNC(work_processed_syscall) | |
123 | #define ia64_leave_kernel IA64_PARAVIRT_ASM_FUNC(leave_kernel) | |
124 | ||
1ff730b5 | 125 | #endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */ |