Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef _ASM_IA64_PROCESSOR_H |
| 2 | #define _ASM_IA64_PROCESSOR_H |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 1998-2004 Hewlett-Packard Co |
| 6 | * David Mosberger-Tang <davidm@hpl.hp.com> |
| 7 | * Stephane Eranian <eranian@hpl.hp.com> |
| 8 | * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> |
| 9 | * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> |
| 10 | * |
| 11 | * 11/24/98 S.Eranian added ia64_set_iva() |
| 12 | * 12/03/99 D. Mosberger implement thread_saved_pc() via kernel unwind API |
| 13 | * 06/16/00 A. Mallick added csd/ssd/tssd for ia32 support |
| 14 | */ |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
| 17 | #include <asm/intrinsics.h> |
| 18 | #include <asm/kregs.h> |
| 19 | #include <asm/ptrace.h> |
| 20 | #include <asm/ustack.h> |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define IA64_NUM_DBG_REGS 8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #define DEFAULT_MAP_BASE __IA64_UL_CONST(0x2000000000000000) |
| 25 | #define DEFAULT_TASK_SIZE __IA64_UL_CONST(0xa000000000000000) |
| 26 | |
| 27 | /* |
| 28 | * TASK_SIZE really is a mis-named. It really is the maximum user |
| 29 | * space address (plus one). On IA-64, there are five regions of 2TB |
| 30 | * each (assuming 8KB page size), for a total of 8TB of user virtual |
| 31 | * address space. |
| 32 | */ |
| 33 | #define TASK_SIZE (current->thread.task_size) |
| 34 | |
| 35 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * This decides where the kernel will search for a free chunk of vm |
| 37 | * space during mmap's. |
| 38 | */ |
| 39 | #define TASK_UNMAPPED_BASE (current->thread.map_base) |
| 40 | |
| 41 | #define IA64_THREAD_FPH_VALID (__IA64_UL(1) << 0) /* floating-point high state valid? */ |
| 42 | #define IA64_THREAD_DBG_VALID (__IA64_UL(1) << 1) /* debug registers valid? */ |
| 43 | #define IA64_THREAD_PM_VALID (__IA64_UL(1) << 2) /* performance registers valid? */ |
| 44 | #define IA64_THREAD_UAC_NOPRINT (__IA64_UL(1) << 3) /* don't log unaligned accesses */ |
| 45 | #define IA64_THREAD_UAC_SIGBUS (__IA64_UL(1) << 4) /* generate SIGBUS on unaligned acc. */ |
Brent Casavant | e08e6c5 | 2006-01-26 15:55:52 -0800 | [diff] [blame] | 46 | #define IA64_THREAD_MIGRATION (__IA64_UL(1) << 5) /* require migration |
| 47 | sync at ctx sw */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #define IA64_THREAD_FPEMU_NOPRINT (__IA64_UL(1) << 6) /* don't log any fpswa faults */ |
| 49 | #define IA64_THREAD_FPEMU_SIGFPE (__IA64_UL(1) << 7) /* send a SIGFPE for fpswa faults */ |
| 50 | |
| 51 | #define IA64_THREAD_UAC_SHIFT 3 |
| 52 | #define IA64_THREAD_UAC_MASK (IA64_THREAD_UAC_NOPRINT | IA64_THREAD_UAC_SIGBUS) |
| 53 | #define IA64_THREAD_FPEMU_SHIFT 6 |
| 54 | #define IA64_THREAD_FPEMU_MASK (IA64_THREAD_FPEMU_NOPRINT | IA64_THREAD_FPEMU_SIGFPE) |
| 55 | |
| 56 | |
| 57 | /* |
| 58 | * This shift should be large enough to be able to represent 1000000000/itc_freq with good |
| 59 | * accuracy while being small enough to fit 10*1000000000<<IA64_NSEC_PER_CYC_SHIFT in 64 bits |
| 60 | * (this will give enough slack to represent 10 seconds worth of time as a scaled number). |
| 61 | */ |
| 62 | #define IA64_NSEC_PER_CYC_SHIFT 30 |
| 63 | |
| 64 | #ifndef __ASSEMBLY__ |
| 65 | |
| 66 | #include <linux/cache.h> |
| 67 | #include <linux/compiler.h> |
| 68 | #include <linux/threads.h> |
| 69 | #include <linux/types.h> |
| 70 | |
| 71 | #include <asm/fpu.h> |
| 72 | #include <asm/page.h> |
| 73 | #include <asm/percpu.h> |
| 74 | #include <asm/rse.h> |
| 75 | #include <asm/unwind.h> |
| 76 | #include <asm/atomic.h> |
| 77 | #ifdef CONFIG_NUMA |
| 78 | #include <asm/nodedata.h> |
| 79 | #endif |
| 80 | |
| 81 | /* like above but expressed as bitfields for more efficient access: */ |
| 82 | struct ia64_psr { |
| 83 | __u64 reserved0 : 1; |
| 84 | __u64 be : 1; |
| 85 | __u64 up : 1; |
| 86 | __u64 ac : 1; |
| 87 | __u64 mfl : 1; |
| 88 | __u64 mfh : 1; |
| 89 | __u64 reserved1 : 7; |
| 90 | __u64 ic : 1; |
| 91 | __u64 i : 1; |
| 92 | __u64 pk : 1; |
| 93 | __u64 reserved2 : 1; |
| 94 | __u64 dt : 1; |
| 95 | __u64 dfl : 1; |
| 96 | __u64 dfh : 1; |
| 97 | __u64 sp : 1; |
| 98 | __u64 pp : 1; |
| 99 | __u64 di : 1; |
| 100 | __u64 si : 1; |
| 101 | __u64 db : 1; |
| 102 | __u64 lp : 1; |
| 103 | __u64 tb : 1; |
| 104 | __u64 rt : 1; |
| 105 | __u64 reserved3 : 4; |
| 106 | __u64 cpl : 2; |
| 107 | __u64 is : 1; |
| 108 | __u64 mc : 1; |
| 109 | __u64 it : 1; |
| 110 | __u64 id : 1; |
| 111 | __u64 da : 1; |
| 112 | __u64 dd : 1; |
| 113 | __u64 ss : 1; |
| 114 | __u64 ri : 2; |
| 115 | __u64 ed : 1; |
| 116 | __u64 bn : 1; |
| 117 | __u64 reserved4 : 19; |
| 118 | }; |
| 119 | |
| 120 | /* |
| 121 | * CPU type, hardware bug flags, and per-CPU state. Frequently used |
| 122 | * state comes earlier: |
| 123 | */ |
| 124 | struct cpuinfo_ia64 { |
| 125 | __u32 softirq_pending; |
| 126 | __u64 itm_delta; /* # of clock cycles between clock ticks */ |
| 127 | __u64 itm_next; /* interval timer mask value to use for next clock tick */ |
| 128 | __u64 nsec_per_cyc; /* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */ |
| 129 | __u64 unimpl_va_mask; /* mask of unimplemented virtual address bits (from PAL) */ |
| 130 | __u64 unimpl_pa_mask; /* mask of unimplemented physical address bits (from PAL) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | __u64 itc_freq; /* frequency of ITC counter */ |
| 132 | __u64 proc_freq; /* frequency of processor */ |
| 133 | __u64 cyc_per_usec; /* itc_freq/1000000 */ |
| 134 | __u64 ptce_base; |
| 135 | __u32 ptce_count[2]; |
| 136 | __u32 ptce_stride[2]; |
| 137 | struct task_struct *ksoftirqd; /* kernel softirq daemon for this CPU */ |
| 138 | |
| 139 | #ifdef CONFIG_SMP |
| 140 | __u64 loops_per_jiffy; |
| 141 | int cpu; |
Suresh Siddha | e927ecb | 2005-04-25 13:25:06 -0700 | [diff] [blame] | 142 | __u32 socket_id; /* physical processor socket id */ |
| 143 | __u16 core_id; /* core id */ |
| 144 | __u16 thread_id; /* thread id */ |
| 145 | __u16 num_log; /* Total number of logical processors on |
| 146 | * this socket that were successfully booted */ |
| 147 | __u8 cores_per_socket; /* Cores per processor socket */ |
| 148 | __u8 threads_per_core; /* Threads per core */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | #endif |
| 150 | |
| 151 | /* CPUID-derived information: */ |
| 152 | __u64 ppn; |
| 153 | __u64 features; |
| 154 | __u8 number; |
| 155 | __u8 revision; |
| 156 | __u8 model; |
| 157 | __u8 family; |
| 158 | __u8 archrev; |
| 159 | char vendor[16]; |
Tony Luck | 76d08bb | 2006-06-05 13:54:14 -0700 | [diff] [blame] | 160 | char *model_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
| 162 | #ifdef CONFIG_NUMA |
| 163 | struct ia64_node_data *node_data; |
| 164 | #endif |
| 165 | }; |
| 166 | |
| 167 | DECLARE_PER_CPU(struct cpuinfo_ia64, cpu_info); |
| 168 | |
| 169 | /* |
| 170 | * The "local" data variable. It refers to the per-CPU data of the currently executing |
| 171 | * CPU, much like "current" points to the per-task data of the currently executing task. |
| 172 | * Do not use the address of local_cpu_data, since it will be different from |
| 173 | * cpu_data(smp_processor_id())! |
| 174 | */ |
| 175 | #define local_cpu_data (&__ia64_per_cpu_var(cpu_info)) |
| 176 | #define cpu_data(cpu) (&per_cpu(cpu_info, cpu)) |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | extern void print_cpu_info (struct cpuinfo_ia64 *); |
| 179 | |
| 180 | typedef struct { |
| 181 | unsigned long seg; |
| 182 | } mm_segment_t; |
| 183 | |
| 184 | #define SET_UNALIGN_CTL(task,value) \ |
| 185 | ({ \ |
| 186 | (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_UAC_MASK) \ |
| 187 | | (((value) << IA64_THREAD_UAC_SHIFT) & IA64_THREAD_UAC_MASK)); \ |
| 188 | 0; \ |
| 189 | }) |
| 190 | #define GET_UNALIGN_CTL(task,addr) \ |
| 191 | ({ \ |
| 192 | put_user(((task)->thread.flags & IA64_THREAD_UAC_MASK) >> IA64_THREAD_UAC_SHIFT, \ |
| 193 | (int __user *) (addr)); \ |
| 194 | }) |
| 195 | |
| 196 | #define SET_FPEMU_CTL(task,value) \ |
| 197 | ({ \ |
| 198 | (task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_FPEMU_MASK) \ |
| 199 | | (((value) << IA64_THREAD_FPEMU_SHIFT) & IA64_THREAD_FPEMU_MASK)); \ |
| 200 | 0; \ |
| 201 | }) |
| 202 | #define GET_FPEMU_CTL(task,addr) \ |
| 203 | ({ \ |
| 204 | put_user(((task)->thread.flags & IA64_THREAD_FPEMU_MASK) >> IA64_THREAD_FPEMU_SHIFT, \ |
| 205 | (int __user *) (addr)); \ |
| 206 | }) |
| 207 | |
| 208 | #ifdef CONFIG_IA32_SUPPORT |
| 209 | struct desc_struct { |
| 210 | unsigned int a, b; |
| 211 | }; |
| 212 | |
Maciej Zenczykowski | 58e9491 | 2007-04-04 19:08:27 -0700 | [diff] [blame] | 213 | #define desc_empty(desc) (!((desc)->a | (desc)->b)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | #define desc_equal(desc1, desc2) (((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b)) |
| 215 | |
| 216 | #define GDT_ENTRY_TLS_ENTRIES 3 |
| 217 | #define GDT_ENTRY_TLS_MIN 6 |
| 218 | #define GDT_ENTRY_TLS_MAX (GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1) |
| 219 | |
| 220 | #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) |
| 221 | |
| 222 | struct partial_page_list; |
| 223 | #endif |
| 224 | |
| 225 | struct thread_struct { |
| 226 | __u32 flags; /* various thread flags (see IA64_THREAD_*) */ |
| 227 | /* writing on_ustack is performance-critical, so it's worth spending 8 bits on it... */ |
| 228 | __u8 on_ustack; /* executing on user-stacks? */ |
| 229 | __u8 pad[3]; |
| 230 | __u64 ksp; /* kernel stack pointer */ |
| 231 | __u64 map_base; /* base address for get_unmapped_area() */ |
| 232 | __u64 task_size; /* limit for task size */ |
| 233 | __u64 rbs_bot; /* the base address for the RBS */ |
| 234 | int last_fph_cpu; /* CPU that may hold the contents of f32-f127 */ |
| 235 | |
| 236 | #ifdef CONFIG_IA32_SUPPORT |
| 237 | __u64 eflag; /* IA32 EFLAGS reg */ |
| 238 | __u64 fsr; /* IA32 floating pt status reg */ |
| 239 | __u64 fcr; /* IA32 floating pt control reg */ |
| 240 | __u64 fir; /* IA32 fp except. instr. reg */ |
| 241 | __u64 fdr; /* IA32 fp except. data reg */ |
| 242 | __u64 old_k1; /* old value of ar.k1 */ |
| 243 | __u64 old_iob; /* old IOBase value */ |
| 244 | struct partial_page_list *ppl; /* partial page list for 4K page size issue */ |
| 245 | /* cached TLS descriptors. */ |
| 246 | struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; |
| 247 | |
| 248 | # define INIT_THREAD_IA32 .eflag = 0, \ |
| 249 | .fsr = 0, \ |
| 250 | .fcr = 0x17800000037fULL, \ |
| 251 | .fir = 0, \ |
| 252 | .fdr = 0, \ |
| 253 | .old_k1 = 0, \ |
| 254 | .old_iob = 0, \ |
| 255 | .ppl = NULL, |
| 256 | #else |
| 257 | # define INIT_THREAD_IA32 |
| 258 | #endif /* CONFIG_IA32_SUPPORT */ |
| 259 | #ifdef CONFIG_PERFMON |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | void *pfm_context; /* pointer to detailed PMU context */ |
| 261 | unsigned long pfm_needs_checking; /* when >0, pending perfmon work on kernel exit */ |
Keshavamurthy Anil S | 35589a8 | 2006-09-26 12:03:13 -0700 | [diff] [blame] | 262 | # define INIT_THREAD_PM .pfm_context = NULL, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | .pfm_needs_checking = 0UL, |
| 264 | #else |
| 265 | # define INIT_THREAD_PM |
| 266 | #endif |
| 267 | __u64 dbr[IA64_NUM_DBG_REGS]; |
| 268 | __u64 ibr[IA64_NUM_DBG_REGS]; |
| 269 | struct ia64_fpreg fph[96]; /* saved/loaded on demand */ |
| 270 | }; |
| 271 | |
| 272 | #define INIT_THREAD { \ |
| 273 | .flags = 0, \ |
| 274 | .on_ustack = 0, \ |
| 275 | .ksp = 0, \ |
| 276 | .map_base = DEFAULT_MAP_BASE, \ |
| 277 | .rbs_bot = STACK_TOP - DEFAULT_USER_STACK_SIZE, \ |
| 278 | .task_size = DEFAULT_TASK_SIZE, \ |
| 279 | .last_fph_cpu = -1, \ |
| 280 | INIT_THREAD_IA32 \ |
| 281 | INIT_THREAD_PM \ |
| 282 | .dbr = {0, }, \ |
| 283 | .ibr = {0, }, \ |
| 284 | .fph = {{{{0}}}, } \ |
| 285 | } |
| 286 | |
| 287 | #define start_thread(regs,new_ip,new_sp) do { \ |
| 288 | set_fs(USER_DS); \ |
| 289 | regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL)) \ |
| 290 | & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS)); \ |
| 291 | regs->cr_iip = new_ip; \ |
| 292 | regs->ar_rsc = 0xf; /* eager mode, privilege level 3 */ \ |
| 293 | regs->ar_rnat = 0; \ |
| 294 | regs->ar_bspstore = current->thread.rbs_bot; \ |
| 295 | regs->ar_fpsr = FPSR_DEFAULT; \ |
| 296 | regs->loadrs = 0; \ |
| 297 | regs->r8 = current->mm->dumpable; /* set "don't zap registers" flag */ \ |
| 298 | regs->r12 = new_sp - 16; /* allocate 16 byte scratch area */ \ |
| 299 | if (unlikely(!current->mm->dumpable)) { \ |
| 300 | /* \ |
| 301 | * Zap scratch regs to avoid leaking bits between processes with different \ |
| 302 | * uid/privileges. \ |
| 303 | */ \ |
| 304 | regs->ar_pfs = 0; regs->b0 = 0; regs->pr = 0; \ |
| 305 | regs->r1 = 0; regs->r9 = 0; regs->r11 = 0; regs->r13 = 0; regs->r15 = 0; \ |
| 306 | } \ |
| 307 | } while (0) |
| 308 | |
| 309 | /* Forward declarations, a strange C thing... */ |
| 310 | struct mm_struct; |
| 311 | struct task_struct; |
| 312 | |
| 313 | /* |
| 314 | * Free all resources held by a thread. This is called after the |
| 315 | * parent of DEAD_TASK has collected the exit status of the task via |
| 316 | * wait(). |
| 317 | */ |
| 318 | #define release_thread(dead_task) |
| 319 | |
| 320 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 321 | #define prepare_to_copy(tsk) do { } while (0) |
| 322 | |
| 323 | /* |
| 324 | * This is the mechanism for creating a new kernel thread. |
| 325 | * |
| 326 | * NOTE 1: Only a kernel-only process (ie the swapper or direct |
| 327 | * descendants who haven't done an "execve()") should use this: it |
| 328 | * will work within a system call from a "real" process, but the |
| 329 | * process memory space will not be free'd until both the parent and |
| 330 | * the child have exited. |
| 331 | * |
| 332 | * NOTE 2: This MUST NOT be an inlined function. Otherwise, we get |
| 333 | * into trouble in init/main.c when the child thread returns to |
| 334 | * do_basic_setup() and the timing is such that free_initmem() has |
| 335 | * been called already. |
| 336 | */ |
| 337 | extern pid_t kernel_thread (int (*fn)(void *), void *arg, unsigned long flags); |
| 338 | |
| 339 | /* Get wait channel for task P. */ |
| 340 | extern unsigned long get_wchan (struct task_struct *p); |
| 341 | |
| 342 | /* Return instruction pointer of blocked task TSK. */ |
| 343 | #define KSTK_EIP(tsk) \ |
| 344 | ({ \ |
Al Viro | 6450578 | 2006-01-12 01:06:06 -0800 | [diff] [blame] | 345 | struct pt_regs *_regs = task_pt_regs(tsk); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | _regs->cr_iip + ia64_psr(_regs)->ri; \ |
| 347 | }) |
| 348 | |
| 349 | /* Return stack pointer of blocked task TSK. */ |
| 350 | #define KSTK_ESP(tsk) ((tsk)->thread.ksp) |
| 351 | |
| 352 | extern void ia64_getreg_unknown_kr (void); |
| 353 | extern void ia64_setreg_unknown_kr (void); |
| 354 | |
| 355 | #define ia64_get_kr(regnum) \ |
| 356 | ({ \ |
| 357 | unsigned long r = 0; \ |
| 358 | \ |
| 359 | switch (regnum) { \ |
| 360 | case 0: r = ia64_getreg(_IA64_REG_AR_KR0); break; \ |
| 361 | case 1: r = ia64_getreg(_IA64_REG_AR_KR1); break; \ |
| 362 | case 2: r = ia64_getreg(_IA64_REG_AR_KR2); break; \ |
| 363 | case 3: r = ia64_getreg(_IA64_REG_AR_KR3); break; \ |
| 364 | case 4: r = ia64_getreg(_IA64_REG_AR_KR4); break; \ |
| 365 | case 5: r = ia64_getreg(_IA64_REG_AR_KR5); break; \ |
| 366 | case 6: r = ia64_getreg(_IA64_REG_AR_KR6); break; \ |
| 367 | case 7: r = ia64_getreg(_IA64_REG_AR_KR7); break; \ |
| 368 | default: ia64_getreg_unknown_kr(); break; \ |
| 369 | } \ |
| 370 | r; \ |
| 371 | }) |
| 372 | |
| 373 | #define ia64_set_kr(regnum, r) \ |
| 374 | ({ \ |
| 375 | switch (regnum) { \ |
| 376 | case 0: ia64_setreg(_IA64_REG_AR_KR0, r); break; \ |
| 377 | case 1: ia64_setreg(_IA64_REG_AR_KR1, r); break; \ |
| 378 | case 2: ia64_setreg(_IA64_REG_AR_KR2, r); break; \ |
| 379 | case 3: ia64_setreg(_IA64_REG_AR_KR3, r); break; \ |
| 380 | case 4: ia64_setreg(_IA64_REG_AR_KR4, r); break; \ |
| 381 | case 5: ia64_setreg(_IA64_REG_AR_KR5, r); break; \ |
| 382 | case 6: ia64_setreg(_IA64_REG_AR_KR6, r); break; \ |
| 383 | case 7: ia64_setreg(_IA64_REG_AR_KR7, r); break; \ |
| 384 | default: ia64_setreg_unknown_kr(); break; \ |
| 385 | } \ |
| 386 | }) |
| 387 | |
| 388 | /* |
| 389 | * The following three macros can't be inline functions because we don't have struct |
| 390 | * task_struct at this point. |
| 391 | */ |
| 392 | |
Peter Chubb | 05062d9 | 2005-06-08 15:50:20 -0700 | [diff] [blame] | 393 | /* |
| 394 | * Return TRUE if task T owns the fph partition of the CPU we're running on. |
| 395 | * Must be called from code that has preemption disabled. |
| 396 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | #define ia64_is_local_fpu_owner(t) \ |
| 398 | ({ \ |
| 399 | struct task_struct *__ia64_islfo_task = (t); \ |
| 400 | (__ia64_islfo_task->thread.last_fph_cpu == smp_processor_id() \ |
| 401 | && __ia64_islfo_task == (struct task_struct *) ia64_get_kr(IA64_KR_FPU_OWNER)); \ |
| 402 | }) |
| 403 | |
Peter Chubb | 05062d9 | 2005-06-08 15:50:20 -0700 | [diff] [blame] | 404 | /* |
| 405 | * Mark task T as owning the fph partition of the CPU we're running on. |
| 406 | * Must be called from code that has preemption disabled. |
| 407 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | #define ia64_set_local_fpu_owner(t) do { \ |
| 409 | struct task_struct *__ia64_slfo_task = (t); \ |
| 410 | __ia64_slfo_task->thread.last_fph_cpu = smp_processor_id(); \ |
| 411 | ia64_set_kr(IA64_KR_FPU_OWNER, (unsigned long) __ia64_slfo_task); \ |
| 412 | } while (0) |
| 413 | |
| 414 | /* Mark the fph partition of task T as being invalid on all CPUs. */ |
| 415 | #define ia64_drop_fpu(t) ((t)->thread.last_fph_cpu = -1) |
| 416 | |
| 417 | extern void __ia64_init_fpu (void); |
| 418 | extern void __ia64_save_fpu (struct ia64_fpreg *fph); |
| 419 | extern void __ia64_load_fpu (struct ia64_fpreg *fph); |
| 420 | extern void ia64_save_debug_regs (unsigned long *save_area); |
| 421 | extern void ia64_load_debug_regs (unsigned long *save_area); |
| 422 | |
| 423 | #ifdef CONFIG_IA32_SUPPORT |
| 424 | extern void ia32_save_state (struct task_struct *task); |
| 425 | extern void ia32_load_state (struct task_struct *task); |
| 426 | #endif |
| 427 | |
| 428 | #define ia64_fph_enable() do { ia64_rsm(IA64_PSR_DFH); ia64_srlz_d(); } while (0) |
| 429 | #define ia64_fph_disable() do { ia64_ssm(IA64_PSR_DFH); ia64_srlz_d(); } while (0) |
| 430 | |
| 431 | /* load fp 0.0 into fph */ |
| 432 | static inline void |
| 433 | ia64_init_fpu (void) { |
| 434 | ia64_fph_enable(); |
| 435 | __ia64_init_fpu(); |
| 436 | ia64_fph_disable(); |
| 437 | } |
| 438 | |
| 439 | /* save f32-f127 at FPH */ |
| 440 | static inline void |
| 441 | ia64_save_fpu (struct ia64_fpreg *fph) { |
| 442 | ia64_fph_enable(); |
| 443 | __ia64_save_fpu(fph); |
| 444 | ia64_fph_disable(); |
| 445 | } |
| 446 | |
| 447 | /* load f32-f127 from FPH */ |
| 448 | static inline void |
| 449 | ia64_load_fpu (struct ia64_fpreg *fph) { |
| 450 | ia64_fph_enable(); |
| 451 | __ia64_load_fpu(fph); |
| 452 | ia64_fph_disable(); |
| 453 | } |
| 454 | |
| 455 | static inline __u64 |
| 456 | ia64_clear_ic (void) |
| 457 | { |
| 458 | __u64 psr; |
| 459 | psr = ia64_getreg(_IA64_REG_PSR); |
| 460 | ia64_stop(); |
| 461 | ia64_rsm(IA64_PSR_I | IA64_PSR_IC); |
| 462 | ia64_srlz_i(); |
| 463 | return psr; |
| 464 | } |
| 465 | |
| 466 | /* |
| 467 | * Restore the psr. |
| 468 | */ |
| 469 | static inline void |
| 470 | ia64_set_psr (__u64 psr) |
| 471 | { |
| 472 | ia64_stop(); |
| 473 | ia64_setreg(_IA64_REG_PSR_L, psr); |
| 474 | ia64_srlz_d(); |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * Insert a translation into an instruction and/or data translation |
| 479 | * register. |
| 480 | */ |
| 481 | static inline void |
| 482 | ia64_itr (__u64 target_mask, __u64 tr_num, |
| 483 | __u64 vmaddr, __u64 pte, |
| 484 | __u64 log_page_size) |
| 485 | { |
| 486 | ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2)); |
| 487 | ia64_setreg(_IA64_REG_CR_IFA, vmaddr); |
| 488 | ia64_stop(); |
| 489 | if (target_mask & 0x1) |
| 490 | ia64_itri(tr_num, pte); |
| 491 | if (target_mask & 0x2) |
| 492 | ia64_itrd(tr_num, pte); |
| 493 | } |
| 494 | |
| 495 | /* |
| 496 | * Insert a translation into the instruction and/or data translation |
| 497 | * cache. |
| 498 | */ |
| 499 | static inline void |
| 500 | ia64_itc (__u64 target_mask, __u64 vmaddr, __u64 pte, |
| 501 | __u64 log_page_size) |
| 502 | { |
| 503 | ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2)); |
| 504 | ia64_setreg(_IA64_REG_CR_IFA, vmaddr); |
| 505 | ia64_stop(); |
| 506 | /* as per EAS2.6, itc must be the last instruction in an instruction group */ |
| 507 | if (target_mask & 0x1) |
| 508 | ia64_itci(pte); |
| 509 | if (target_mask & 0x2) |
| 510 | ia64_itcd(pte); |
| 511 | } |
| 512 | |
| 513 | /* |
| 514 | * Purge a range of addresses from instruction and/or data translation |
| 515 | * register(s). |
| 516 | */ |
| 517 | static inline void |
| 518 | ia64_ptr (__u64 target_mask, __u64 vmaddr, __u64 log_size) |
| 519 | { |
| 520 | if (target_mask & 0x1) |
| 521 | ia64_ptri(vmaddr, (log_size << 2)); |
| 522 | if (target_mask & 0x2) |
| 523 | ia64_ptrd(vmaddr, (log_size << 2)); |
| 524 | } |
| 525 | |
| 526 | /* Set the interrupt vector address. The address must be suitably aligned (32KB). */ |
| 527 | static inline void |
| 528 | ia64_set_iva (void *ivt_addr) |
| 529 | { |
| 530 | ia64_setreg(_IA64_REG_CR_IVA, (__u64) ivt_addr); |
| 531 | ia64_srlz_i(); |
| 532 | } |
| 533 | |
| 534 | /* Set the page table address and control bits. */ |
| 535 | static inline void |
| 536 | ia64_set_pta (__u64 pta) |
| 537 | { |
| 538 | /* Note: srlz.i implies srlz.d */ |
| 539 | ia64_setreg(_IA64_REG_CR_PTA, pta); |
| 540 | ia64_srlz_i(); |
| 541 | } |
| 542 | |
| 543 | static inline void |
| 544 | ia64_eoi (void) |
| 545 | { |
| 546 | ia64_setreg(_IA64_REG_CR_EOI, 0); |
| 547 | ia64_srlz_d(); |
| 548 | } |
| 549 | |
| 550 | #define cpu_relax() ia64_hint(ia64_hint_pause) |
| 551 | |
Bjorn Helgaas | a587869 | 2006-01-30 16:32:31 -0700 | [diff] [blame] | 552 | static inline int |
| 553 | ia64_get_irr(unsigned int vector) |
| 554 | { |
| 555 | unsigned int reg = vector / 64; |
| 556 | unsigned int bit = vector % 64; |
| 557 | u64 irr; |
| 558 | |
| 559 | switch (reg) { |
| 560 | case 0: irr = ia64_getreg(_IA64_REG_CR_IRR0); break; |
| 561 | case 1: irr = ia64_getreg(_IA64_REG_CR_IRR1); break; |
| 562 | case 2: irr = ia64_getreg(_IA64_REG_CR_IRR2); break; |
| 563 | case 3: irr = ia64_getreg(_IA64_REG_CR_IRR3); break; |
| 564 | } |
| 565 | |
| 566 | return test_bit(bit, &irr); |
| 567 | } |
| 568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | static inline void |
| 570 | ia64_set_lrr0 (unsigned long val) |
| 571 | { |
| 572 | ia64_setreg(_IA64_REG_CR_LRR0, val); |
| 573 | ia64_srlz_d(); |
| 574 | } |
| 575 | |
| 576 | static inline void |
| 577 | ia64_set_lrr1 (unsigned long val) |
| 578 | { |
| 579 | ia64_setreg(_IA64_REG_CR_LRR1, val); |
| 580 | ia64_srlz_d(); |
| 581 | } |
| 582 | |
| 583 | |
| 584 | /* |
| 585 | * Given the address to which a spill occurred, return the unat bit |
| 586 | * number that corresponds to this address. |
| 587 | */ |
| 588 | static inline __u64 |
| 589 | ia64_unat_pos (void *spill_addr) |
| 590 | { |
| 591 | return ((__u64) spill_addr >> 3) & 0x3f; |
| 592 | } |
| 593 | |
| 594 | /* |
| 595 | * Set the NaT bit of an integer register which was spilled at address |
| 596 | * SPILL_ADDR. UNAT is the mask to be updated. |
| 597 | */ |
| 598 | static inline void |
| 599 | ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat) |
| 600 | { |
| 601 | __u64 bit = ia64_unat_pos(spill_addr); |
| 602 | __u64 mask = 1UL << bit; |
| 603 | |
| 604 | *unat = (*unat & ~mask) | (nat << bit); |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * Return saved PC of a blocked thread. |
| 609 | * Note that the only way T can block is through a call to schedule() -> switch_to(). |
| 610 | */ |
| 611 | static inline unsigned long |
| 612 | thread_saved_pc (struct task_struct *t) |
| 613 | { |
| 614 | struct unw_frame_info info; |
| 615 | unsigned long ip; |
| 616 | |
| 617 | unw_init_from_blocked_task(&info, t); |
| 618 | if (unw_unwind(&info) < 0) |
| 619 | return 0; |
| 620 | unw_get_ip(&info, &ip); |
| 621 | return ip; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * Get the current instruction/program counter value. |
| 626 | */ |
| 627 | #define current_text_addr() \ |
| 628 | ({ void *_pc; _pc = (void *)ia64_getreg(_IA64_REG_IP); _pc; }) |
| 629 | |
| 630 | static inline __u64 |
| 631 | ia64_get_ivr (void) |
| 632 | { |
| 633 | __u64 r; |
| 634 | ia64_srlz_d(); |
| 635 | r = ia64_getreg(_IA64_REG_CR_IVR); |
| 636 | ia64_srlz_d(); |
| 637 | return r; |
| 638 | } |
| 639 | |
| 640 | static inline void |
| 641 | ia64_set_dbr (__u64 regnum, __u64 value) |
| 642 | { |
| 643 | __ia64_set_dbr(regnum, value); |
| 644 | #ifdef CONFIG_ITANIUM |
| 645 | ia64_srlz_d(); |
| 646 | #endif |
| 647 | } |
| 648 | |
| 649 | static inline __u64 |
| 650 | ia64_get_dbr (__u64 regnum) |
| 651 | { |
| 652 | __u64 retval; |
| 653 | |
| 654 | retval = __ia64_get_dbr(regnum); |
| 655 | #ifdef CONFIG_ITANIUM |
| 656 | ia64_srlz_d(); |
| 657 | #endif |
| 658 | return retval; |
| 659 | } |
| 660 | |
| 661 | static inline __u64 |
| 662 | ia64_rotr (__u64 w, __u64 n) |
| 663 | { |
| 664 | return (w >> n) | (w << (64 - n)); |
| 665 | } |
| 666 | |
| 667 | #define ia64_rotl(w,n) ia64_rotr((w), (64) - (n)) |
| 668 | |
| 669 | /* |
| 670 | * Take a mapped kernel address and return the equivalent address |
| 671 | * in the region 7 identity mapped virtual area. |
| 672 | */ |
| 673 | static inline void * |
| 674 | ia64_imva (void *addr) |
| 675 | { |
| 676 | void *result; |
| 677 | result = (void *) ia64_tpa(addr); |
| 678 | return __va(result); |
| 679 | } |
| 680 | |
| 681 | #define ARCH_HAS_PREFETCH |
| 682 | #define ARCH_HAS_PREFETCHW |
| 683 | #define ARCH_HAS_SPINLOCK_PREFETCH |
| 684 | #define PREFETCH_STRIDE L1_CACHE_BYTES |
| 685 | |
| 686 | static inline void |
| 687 | prefetch (const void *x) |
| 688 | { |
| 689 | ia64_lfetch(ia64_lfhint_none, x); |
| 690 | } |
| 691 | |
| 692 | static inline void |
| 693 | prefetchw (const void *x) |
| 694 | { |
| 695 | ia64_lfetch_excl(ia64_lfhint_none, x); |
| 696 | } |
| 697 | |
| 698 | #define spin_lock_prefetch(x) prefetchw(x) |
| 699 | |
| 700 | extern unsigned long boot_option_idle_override; |
| 701 | |
| 702 | #endif /* !__ASSEMBLY__ */ |
| 703 | |
| 704 | #endif /* _ASM_IA64_PROCESSOR_H */ |