arch/ia64/include/asm/paravirt.h

   1 /******************************************************************************
   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
  22 #ifndef __ASM_PARAVIRT_H
  23 #define __ASM_PARAVIRT_H
  24
  25 #ifndef __ASSEMBLY__
  26 /******************************************************************************
  27  * fsys related addresses
  28  */
  29 struct pv_fsys_data {
  30         unsigned long *fsyscall_table;
  31         void *fsys_bubble_down;
  32 };
  33
  34 extern struct pv_fsys_data pv_fsys_data;
  35
  36 unsigned long *paravirt_get_fsyscall_table(void);
  37 char *paravirt_get_fsys_bubble_down(void);
  38
  39 /******************************************************************************
  40  * patchlist addresses for gate page
  41  */
  42 enum pv_gate_patchlist {
  43         PV_GATE_START_FSYSCALL,
  44         PV_GATE_END_FSYSCALL,
  45
  46         PV_GATE_START_BRL_FSYS_BUBBLE_DOWN,
  47         PV_GATE_END_BRL_FSYS_BUBBLE_DOWN,
  48
  49         PV_GATE_START_VTOP,
  50         PV_GATE_END_VTOP,
  51
  52         PV_GATE_START_MCKINLEY_E9,
  53         PV_GATE_END_MCKINLEY_E9,
  54 };
  55
  56 struct pv_patchdata {
  57         unsigned long start_fsyscall_patchlist;
  58         unsigned long end_fsyscall_patchlist;
  59         unsigned long start_brl_fsys_bubble_down_patchlist;
  60         unsigned long end_brl_fsys_bubble_down_patchlist;
  61         unsigned long start_vtop_patchlist;
  62         unsigned long end_vtop_patchlist;
  63         unsigned long start_mckinley_e9_patchlist;
  64         unsigned long end_mckinley_e9_patchlist;
  65
  66         void *gate_section;
  67 };
  68
  69 extern struct pv_patchdata pv_patchdata;
  70
  71 unsigned long paravirt_get_gate_patchlist(enum pv_gate_patchlist type);
  72 void *paravirt_get_gate_section(void);
  73 #endif
  74
  75 #ifdef CONFIG_PARAVIRT_GUEST
  76
  77 #define PARAVIRT_HYPERVISOR_TYPE_DEFAULT        0
  78 #define PARAVIRT_HYPERVISOR_TYPE_XEN            1
  79
  80 #ifndef __ASSEMBLY__
  81
  82 #include <asm/hw_irq.h>
  83 #include <asm/meminit.h>
  84
  85 /******************************************************************************
  86  * general info
  87  */
  88 struct pv_info {
  89         unsigned int kernel_rpl;
  90         int paravirt_enabled;
  91         const char *name;
  92 };
  93
  94 extern struct pv_info pv_info;
  95
  96 static inline int paravirt_enabled(void)
  97 {
  98         return pv_info.paravirt_enabled;
  99 }
 100
 101 static inline unsigned int get_kernel_rpl(void)
 102 {
 103         return pv_info.kernel_rpl;
 104 }
 105
 106 /******************************************************************************
 107  * initialization hooks.
 108  */
 109 struct rsvd_region;
 110
 111 struct pv_init_ops {
 112         void (*banner)(void);
 113
 114         int (*reserve_memory)(struct rsvd_region *region);
 115
 116         void (*arch_setup_early)(void);
 117         void (*arch_setup_console)(char **cmdline_p);
 118         int (*arch_setup_nomca)(void);
 119
 120         void (*post_smp_prepare_boot_cpu)(void);
 121 };
 122
 123 extern struct pv_init_ops pv_init_ops;
 124
 125 static inline void paravirt_banner(void)
 126 {
 127         if (pv_init_ops.banner)
 128                 pv_init_ops.banner();
 129 }
 130
 131 static inline int paravirt_reserve_memory(struct rsvd_region *region)
 132 {
 133         if (pv_init_ops.reserve_memory)
 134                 return pv_init_ops.reserve_memory(region);
 135         return 0;
 136 }
 137
 138 static inline void paravirt_arch_setup_early(void)
 139 {
 140         if (pv_init_ops.arch_setup_early)
 141                 pv_init_ops.arch_setup_early();
 142 }
 143
 144 static inline void paravirt_arch_setup_console(char **cmdline_p)
 145 {
 146         if (pv_init_ops.arch_setup_console)
 147                 pv_init_ops.arch_setup_console(cmdline_p);
 148 }
 149
 150 static inline int paravirt_arch_setup_nomca(void)
 151 {
 152         if (pv_init_ops.arch_setup_nomca)
 153                 return pv_init_ops.arch_setup_nomca();
 154         return 0;
 155 }
 156
 157 static inline void paravirt_post_smp_prepare_boot_cpu(void)
 158 {
 159         if (pv_init_ops.post_smp_prepare_boot_cpu)
 160                 pv_init_ops.post_smp_prepare_boot_cpu();
 161 }
 162
 163 /******************************************************************************
 164  * replacement of iosapic operations.
 165  */
 166
 167 struct pv_iosapic_ops {
 168         void (*pcat_compat_init)(void);
 169
 170         struct irq_chip *(*__get_irq_chip)(unsigned long trigger);
 171
 172         unsigned int (*__read)(char __iomem *iosapic, unsigned int reg);
 173         void (*__write)(char __iomem *iosapic, unsigned int reg, u32 val);
 174 };
 175
 176 extern struct pv_iosapic_ops pv_iosapic_ops;
 177
 178 static inline void
 179 iosapic_pcat_compat_init(void)
 180 {
 181         if (pv_iosapic_ops.pcat_compat_init)
 182                 pv_iosapic_ops.pcat_compat_init();
 183 }
 184
 185 static inline struct irq_chip*
 186 iosapic_get_irq_chip(unsigned long trigger)
 187 {
 188         return pv_iosapic_ops.__get_irq_chip(trigger);
 189 }
 190
 191 static inline unsigned int
 192 __iosapic_read(char __iomem *iosapic, unsigned int reg)
 193 {
 194         return pv_iosapic_ops.__read(iosapic, reg);
 195 }
 196
 197 static inline void
 198 __iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
 199 {
 200         return pv_iosapic_ops.__write(iosapic, reg, val);
 201 }
 202
 203 /******************************************************************************
 204  * replacement of irq operations.
 205  */
 206
 207 struct pv_irq_ops {
 208         void (*register_ipi)(void);
 209
 210         int (*assign_irq_vector)(int irq);
 211         void (*free_irq_vector)(int vector);
 212
 213         void (*register_percpu_irq)(ia64_vector vec,
 214                                     struct irqaction *action);
 215
 216         void (*resend_irq)(unsigned int vector);
 217 };
 218
 219 extern struct pv_irq_ops pv_irq_ops;
 220
 221 static inline void
 222 ia64_register_ipi(void)
 223 {
 224         pv_irq_ops.register_ipi();
 225 }
 226
 227 static inline int
 228 assign_irq_vector(int irq)
 229 {
 230         return pv_irq_ops.assign_irq_vector(irq);
 231 }
 232
 233 static inline void
 234 free_irq_vector(int vector)
 235 {
 236         return pv_irq_ops.free_irq_vector(vector);
 237 }
 238
 239 static inline void
 240 register_percpu_irq(ia64_vector vec, struct irqaction *action)
 241 {
 242         pv_irq_ops.register_percpu_irq(vec, action);
 243 }
 244
 245 static inline void
 246 ia64_resend_irq(unsigned int vector)
 247 {
 248         pv_irq_ops.resend_irq(vector);
 249 }
 250
 251 /******************************************************************************
 252  * replacement of time operations.
 253  */
 254
 255 extern struct itc_jitter_data_t itc_jitter_data;
 256 extern volatile int time_keeper_id;
 257
 258 struct pv_time_ops {
 259         void (*init_missing_ticks_accounting)(int cpu);
 260         int (*do_steal_accounting)(unsigned long *new_itm);
 261
 262         void (*clocksource_resume)(void);
 263
 264         unsigned long long (*sched_clock)(void);
 265 };
 266
 267 extern struct pv_time_ops pv_time_ops;
 268
 269 static inline void
 270 paravirt_init_missing_ticks_accounting(int cpu)
 271 {
 272         if (pv_time_ops.init_missing_ticks_accounting)
 273                 pv_time_ops.init_missing_ticks_accounting(cpu);
 274 }
 275
 276 static inline int
 277 paravirt_do_steal_accounting(unsigned long *new_itm)
 278 {
 279         return pv_time_ops.do_steal_accounting(new_itm);
 280 }
 281
 282 static inline unsigned long long paravirt_sched_clock(void)
 283 {
 284         return pv_time_ops.sched_clock();
 285 }
 286
 287 #endif /* !__ASSEMBLY__ */
 288
 289 #else
 290 /* fallback for native case */
 291
 292 #ifndef __ASSEMBLY__
 293
 294 #define paravirt_banner()                               do { } while (0)
 295 #define paravirt_reserve_memory(region)                 0
 296
 297 #define paravirt_arch_setup_early()                     do { } while (0)
 298 #define paravirt_arch_setup_console(cmdline_p)          do { } while (0)
 299 #define paravirt_arch_setup_nomca()                     0
 300 #define paravirt_post_smp_prepare_boot_cpu()            do { } while (0)
 301
 302 #define paravirt_init_missing_ticks_accounting(cpu)     do { } while (0)
 303 #define paravirt_do_steal_accounting(new_itm)           0
 304
 305 #endif /* __ASSEMBLY__ */
 306
 307
 308 #endif /* CONFIG_PARAVIRT_GUEST */
 309
 310 #endif /* __ASM_PARAVIRT_H */