Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 1 | /****************************************************************************** |
Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 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 | |
Isaku Yamahata | 93fe10b | 2008-11-18 19:19:50 +0900 | [diff] [blame^] | 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 | |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 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 | |
Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 105 | #endif /* __ASSEMBLY__ */ |
| 106 | |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 107 | #define IA64_PARAVIRT_ASM_FUNC(name) paravirt_ ## name |
| 108 | |
Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 109 | #else |
| 110 | |
| 111 | /* fallback for native case */ |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 112 | #define IA64_PARAVIRT_ASM_FUNC(name) ia64_native_ ## name |
Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 113 | |
| 114 | #endif /* CONFIG_PARAVIRT */ |
| 115 | |
Isaku Yamahata | 4df8d22 | 2008-05-27 15:08:01 -0700 | [diff] [blame] | 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 | |
Isaku Yamahata | 1ff730b5 | 2008-05-19 22:13:34 +0900 | [diff] [blame] | 125 | #endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */ |