Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 698 insertions, 0 deletions

diff --git a/include/asm-ia64/processor.h b/include/asm-ia64/processor.h
new file mode 100644
index 000000000000..8769dd9df369
--- /dev/null
+++ b/include/asm-ia64/processor.h
@@ -0,0 +1,698 @@
+#ifndef _ASM_IA64_PROCESSOR_H
+#define _ASM_IA64_PROCESSOR_H
+
+/*
+ * Copyright (C) 1998-2004 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ *	Stephane Eranian <eranian@hpl.hp.com>
+ * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com>
+ * Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
+ *
+ * 11/24/98	S.Eranian	added ia64_set_iva()
+ * 12/03/99	D. Mosberger	implement thread_saved_pc() via kernel unwind API
+ * 06/16/00	A. Mallick	added csd/ssd/tssd for ia32 support
+ */
+
+#include <linux/config.h>
+
+#include <asm/intrinsics.h>
+#include <asm/kregs.h>
+#include <asm/ptrace.h>
+#include <asm/ustack.h>
+
+/* Our arch specific arch_init_sched_domain is in arch/ia64/kernel/domain.c */
+#define ARCH_HAS_SCHED_DOMAIN
+
+#define IA64_NUM_DBG_REGS	8
+/*
+ * Limits for PMC and PMD are set to less than maximum architected values
+ * but should be sufficient for a while
+ */
+#define IA64_NUM_PMC_REGS	32
+#define IA64_NUM_PMD_REGS	32
+
+#define DEFAULT_MAP_BASE	__IA64_UL_CONST(0x2000000000000000)
+#define DEFAULT_TASK_SIZE	__IA64_UL_CONST(0xa000000000000000)
+
+/*
+ * TASK_SIZE really is a mis-named.  It really is the maximum user
+ * space address (plus one).  On IA-64, there are five regions of 2TB
+ * each (assuming 8KB page size), for a total of 8TB of user virtual
+ * address space.
+ */
+#define TASK_SIZE		(current->thread.task_size)
+
+/*
+ * MM_VM_SIZE(mm) gives the maximum address (plus 1) which may contain a mapping for
+ * address-space MM.  Note that with 32-bit tasks, this is still DEFAULT_TASK_SIZE,
+ * because the kernel may have installed helper-mappings above TASK_SIZE.  For example,
+ * for x86 emulation, the LDT and GDT are mapped above TASK_SIZE.
+ */
+#define MM_VM_SIZE(mm)		DEFAULT_TASK_SIZE
+
+/*
+ * This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE	(current->thread.map_base)
+
+#define IA64_THREAD_FPH_VALID	(__IA64_UL(1) << 0)	/* floating-point high state valid? */
+#define IA64_THREAD_DBG_VALID	(__IA64_UL(1) << 1)	/* debug registers valid? */
+#define IA64_THREAD_PM_VALID	(__IA64_UL(1) << 2)	/* performance registers valid? */
+#define IA64_THREAD_UAC_NOPRINT	(__IA64_UL(1) << 3)	/* don't log unaligned accesses */
+#define IA64_THREAD_UAC_SIGBUS	(__IA64_UL(1) << 4)	/* generate SIGBUS on unaligned acc. */
+							/* bit 5 is currently unused */
+#define IA64_THREAD_FPEMU_NOPRINT (__IA64_UL(1) << 6)	/* don't log any fpswa faults */
+#define IA64_THREAD_FPEMU_SIGFPE  (__IA64_UL(1) << 7)	/* send a SIGFPE for fpswa faults */
+
+#define IA64_THREAD_UAC_SHIFT	3
+#define IA64_THREAD_UAC_MASK	(IA64_THREAD_UAC_NOPRINT | IA64_THREAD_UAC_SIGBUS)
+#define IA64_THREAD_FPEMU_SHIFT	6
+#define IA64_THREAD_FPEMU_MASK	(IA64_THREAD_FPEMU_NOPRINT | IA64_THREAD_FPEMU_SIGFPE)
+
+
+/*
+ * This shift should be large enough to be able to represent 1000000000/itc_freq with good
+ * accuracy while being small enough to fit 10*1000000000<<IA64_NSEC_PER_CYC_SHIFT in 64 bits
+ * (this will give enough slack to represent 10 seconds worth of time as a scaled number).
+ */
+#define IA64_NSEC_PER_CYC_SHIFT	30
+
+#ifndef __ASSEMBLY__
+
+#include <linux/cache.h>
+#include <linux/compiler.h>
+#include <linux/threads.h>
+#include <linux/types.h>
+
+#include <asm/fpu.h>
+#include <asm/page.h>
+#include <asm/percpu.h>
+#include <asm/rse.h>
+#include <asm/unwind.h>
+#include <asm/atomic.h>
+#ifdef CONFIG_NUMA
+#include <asm/nodedata.h>
+#endif
+
+/* like above but expressed as bitfields for more efficient access: */
+struct ia64_psr {
+	__u64 reserved0 : 1;
+	__u64 be : 1;
+	__u64 up : 1;
+	__u64 ac : 1;
+	__u64 mfl : 1;
+	__u64 mfh : 1;
+	__u64 reserved1 : 7;
+	__u64 ic : 1;
+	__u64 i : 1;
+	__u64 pk : 1;
+	__u64 reserved2 : 1;
+	__u64 dt : 1;
+	__u64 dfl : 1;
+	__u64 dfh : 1;
+	__u64 sp : 1;
+	__u64 pp : 1;
+	__u64 di : 1;
+	__u64 si : 1;
+	__u64 db : 1;
+	__u64 lp : 1;
+	__u64 tb : 1;
+	__u64 rt : 1;
+	__u64 reserved3 : 4;
+	__u64 cpl : 2;
+	__u64 is : 1;
+	__u64 mc : 1;
+	__u64 it : 1;
+	__u64 id : 1;
+	__u64 da : 1;
+	__u64 dd : 1;
+	__u64 ss : 1;
+	__u64 ri : 2;
+	__u64 ed : 1;
+	__u64 bn : 1;
+	__u64 reserved4 : 19;
+};
+
+/*
+ * CPU type, hardware bug flags, and per-CPU state.  Frequently used
+ * state comes earlier:
+ */
+struct cpuinfo_ia64 {
+	__u32 softirq_pending;
+	__u64 itm_delta;	/* # of clock cycles between clock ticks */
+	__u64 itm_next;		/* interval timer mask value to use for next clock tick */
+	__u64 nsec_per_cyc;	/* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
+	__u64 unimpl_va_mask;	/* mask of unimplemented virtual address bits (from PAL) */
+	__u64 unimpl_pa_mask;	/* mask of unimplemented physical address bits (from PAL) */
+	__u64 *pgd_quick;
+	__u64 *pmd_quick;
+	__u64 pgtable_cache_sz;
+	__u64 itc_freq;		/* frequency of ITC counter */
+	__u64 proc_freq;	/* frequency of processor */
+	__u64 cyc_per_usec;	/* itc_freq/1000000 */
+	__u64 ptce_base;
+	__u32 ptce_count[2];
+	__u32 ptce_stride[2];
+	struct task_struct *ksoftirqd;	/* kernel softirq daemon for this CPU */
+
+#ifdef CONFIG_SMP
+	__u64 loops_per_jiffy;
+	int cpu;
+#endif
+
+	/* CPUID-derived information: */
+	__u64 ppn;
+	__u64 features;
+	__u8 number;
+	__u8 revision;
+	__u8 model;
+	__u8 family;
+	__u8 archrev;
+	char vendor[16];
+
+#ifdef CONFIG_NUMA
+	struct ia64_node_data *node_data;
+#endif
+};
+
+DECLARE_PER_CPU(struct cpuinfo_ia64, cpu_info);
+
+/*
+ * The "local" data variable.  It refers to the per-CPU data of the currently executing
+ * CPU, much like "current" points to the per-task data of the currently executing task.
+ * Do not use the address of local_cpu_data, since it will be different from
+ * cpu_data(smp_processor_id())!
+ */
+#define local_cpu_data		(&__ia64_per_cpu_var(cpu_info))
+#define cpu_data(cpu)		(&per_cpu(cpu_info, cpu))
+
+extern void identify_cpu (struct cpuinfo_ia64 *);
+extern void print_cpu_info (struct cpuinfo_ia64 *);
+
+typedef struct {
+	unsigned long seg;
+} mm_segment_t;
+
+#define SET_UNALIGN_CTL(task,value)								\
+({												\
+	(task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_UAC_MASK)			\
+				| (((value) << IA64_THREAD_UAC_SHIFT) & IA64_THREAD_UAC_MASK));	\
+	0;											\
+})
+#define GET_UNALIGN_CTL(task,addr)								\
+({												\
+	put_user(((task)->thread.flags & IA64_THREAD_UAC_MASK) >> IA64_THREAD_UAC_SHIFT,	\
+		 (int __user *) (addr));							\
+})
+
+#define SET_FPEMU_CTL(task,value)								\
+({												\
+	(task)->thread.flags = (((task)->thread.flags & ~IA64_THREAD_FPEMU_MASK)		\
+			  | (((value) << IA64_THREAD_FPEMU_SHIFT) & IA64_THREAD_FPEMU_MASK));	\
+	0;											\
+})
+#define GET_FPEMU_CTL(task,addr)								\
+({												\
+	put_user(((task)->thread.flags & IA64_THREAD_FPEMU_MASK) >> IA64_THREAD_FPEMU_SHIFT,	\
+		 (int __user *) (addr));							\
+})
+
+#ifdef CONFIG_IA32_SUPPORT
+struct desc_struct {
+	unsigned int a, b;
+};
+
+#define desc_empty(desc)		(!((desc)->a + (desc)->b))
+#define desc_equal(desc1, desc2)	(((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
+
+#define GDT_ENTRY_TLS_ENTRIES	3
+#define GDT_ENTRY_TLS_MIN	6
+#define GDT_ENTRY_TLS_MAX 	(GDT_ENTRY_TLS_MIN + GDT_ENTRY_TLS_ENTRIES - 1)
+
+#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8)
+
+struct partial_page_list;
+#endif
+
+struct thread_struct {
+	__u32 flags;			/* various thread flags (see IA64_THREAD_*) */
+	/* writing on_ustack is performance-critical, so it's worth spending 8 bits on it... */
+	__u8 on_ustack;			/* executing on user-stacks? */
+	__u8 pad[3];
+	__u64 ksp;			/* kernel stack pointer */
+	__u64 map_base;			/* base address for get_unmapped_area() */
+	__u64 task_size;		/* limit for task size */
+	__u64 rbs_bot;			/* the base address for the RBS */
+	int last_fph_cpu;		/* CPU that may hold the contents of f32-f127 */
+
+#ifdef CONFIG_IA32_SUPPORT
+	__u64 eflag;			/* IA32 EFLAGS reg */
+	__u64 fsr;			/* IA32 floating pt status reg */
+	__u64 fcr;			/* IA32 floating pt control reg */
+	__u64 fir;			/* IA32 fp except. instr. reg */
+	__u64 fdr;			/* IA32 fp except. data reg */
+	__u64 old_k1;			/* old value of ar.k1 */
+	__u64 old_iob;			/* old IOBase value */
+	struct partial_page_list *ppl;	/* partial page list for 4K page size issue */
+        /* cached TLS descriptors. */
+	struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
+
+# define INIT_THREAD_IA32	.eflag =	0,			\
+				.fsr =		0,			\
+				.fcr =		0x17800000037fULL,	\
+				.fir =		0,			\
+				.fdr =		0,			\
+				.old_k1 =	0,			\
+				.old_iob =	0,			\
+				.ppl =		NULL,
+#else
+# define INIT_THREAD_IA32
+#endif /* CONFIG_IA32_SUPPORT */
+#ifdef CONFIG_PERFMON
+	__u64 pmcs[IA64_NUM_PMC_REGS];
+	__u64 pmds[IA64_NUM_PMD_REGS];
+	void *pfm_context;		     /* pointer to detailed PMU context */
+	unsigned long pfm_needs_checking;    /* when >0, pending perfmon work on kernel exit */
+# define INIT_THREAD_PM		.pmcs =			{0UL, },  \
+				.pmds =			{0UL, },  \
+				.pfm_context =		NULL,     \
+				.pfm_needs_checking =	0UL,
+#else
+# define INIT_THREAD_PM
+#endif
+	__u64 dbr[IA64_NUM_DBG_REGS];
+	__u64 ibr[IA64_NUM_DBG_REGS];
+	struct ia64_fpreg fph[96];	/* saved/loaded on demand */
+};
+
+#define INIT_THREAD {						\
+	.flags =	0,					\
+	.on_ustack =	0,					\
+	.ksp =		0,					\
+	.map_base =	DEFAULT_MAP_BASE,			\
+	.rbs_bot =	STACK_TOP - DEFAULT_USER_STACK_SIZE,	\
+	.task_size =	DEFAULT_TASK_SIZE,			\
+	.last_fph_cpu =  -1,					\
+	INIT_THREAD_IA32					\
+	INIT_THREAD_PM						\
+	.dbr =		{0, },					\
+	.ibr =		{0, },					\
+	.fph =		{{{{0}}}, }				\
+}
+
+#define start_thread(regs,new_ip,new_sp) do {							\
+	set_fs(USER_DS);									\
+	regs->cr_ipsr = ((regs->cr_ipsr | (IA64_PSR_BITS_TO_SET | IA64_PSR_CPL))		\
+			 & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_RI | IA64_PSR_IS));		\
+	regs->cr_iip = new_ip;									\
+	regs->ar_rsc = 0xf;		/* eager mode, privilege level 3 */			\
+	regs->ar_rnat = 0;									\
+	regs->ar_bspstore = current->thread.rbs_bot;						\
+	regs->ar_fpsr = FPSR_DEFAULT;								\
+	regs->loadrs = 0;									\
+	regs->r8 = current->mm->dumpable;	/* set "don't zap registers" flag */		\
+	regs->r12 = new_sp - 16;	/* allocate 16 byte scratch area */			\
+	if (unlikely(!current->mm->dumpable)) {							\
+		/*										\
+		 * Zap scratch regs to avoid leaking bits between processes with different	\
+		 * uid/privileges.								\
+		 */										\
+		regs->ar_pfs = 0; regs->b0 = 0; regs->pr = 0;					\
+		regs->r1 = 0; regs->r9  = 0; regs->r11 = 0; regs->r13 = 0; regs->r15 = 0;	\
+	}											\
+} while (0)
+
+/* Forward declarations, a strange C thing... */
+struct mm_struct;
+struct task_struct;
+
+/*
+ * Free all resources held by a thread. This is called after the
+ * parent of DEAD_TASK has collected the exit status of the task via
+ * wait().
+ */
+#define release_thread(dead_task)
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)	do { } while (0)
+
+/*
+ * This is the mechanism for creating a new kernel thread.
+ *
+ * NOTE 1: Only a kernel-only process (ie the swapper or direct
+ * descendants who haven't done an "execve()") should use this: it
+ * will work within a system call from a "real" process, but the
+ * process memory space will not be free'd until both the parent and
+ * the child have exited.
+ *
+ * NOTE 2: This MUST NOT be an inlined function.  Otherwise, we get
+ * into trouble in init/main.c when the child thread returns to
+ * do_basic_setup() and the timing is such that free_initmem() has
+ * been called already.
+ */
+extern pid_t kernel_thread (int (*fn)(void *), void *arg, unsigned long flags);
+
+/* Get wait channel for task P.  */
+extern unsigned long get_wchan (struct task_struct *p);
+
+/* Return instruction pointer of blocked task TSK.  */
+#define KSTK_EIP(tsk)					\
+  ({							\
+	struct pt_regs *_regs = ia64_task_regs(tsk);	\
+	_regs->cr_iip + ia64_psr(_regs)->ri;		\
+  })
+
+/* Return stack pointer of blocked task TSK.  */
+#define KSTK_ESP(tsk)  ((tsk)->thread.ksp)
+
+extern void ia64_getreg_unknown_kr (void);
+extern void ia64_setreg_unknown_kr (void);
+
+#define ia64_get_kr(regnum)					\
+({								\
+	unsigned long r = 0;					\
+								\
+	switch (regnum) {					\
+	    case 0: r = ia64_getreg(_IA64_REG_AR_KR0); break;	\
+	    case 1: r = ia64_getreg(_IA64_REG_AR_KR1); break;	\
+	    case 2: r = ia64_getreg(_IA64_REG_AR_KR2); break;	\
+	    case 3: r = ia64_getreg(_IA64_REG_AR_KR3); break;	\
+	    case 4: r = ia64_getreg(_IA64_REG_AR_KR4); break;	\
+	    case 5: r = ia64_getreg(_IA64_REG_AR_KR5); break;	\
+	    case 6: r = ia64_getreg(_IA64_REG_AR_KR6); break;	\
+	    case 7: r = ia64_getreg(_IA64_REG_AR_KR7); break;	\
+	    default: ia64_getreg_unknown_kr(); break;		\
+	}							\
+	r;							\
+})
+
+#define ia64_set_kr(regnum, r) 					\
+({								\
+	switch (regnum) {					\
+	    case 0: ia64_setreg(_IA64_REG_AR_KR0, r); break;	\
+	    case 1: ia64_setreg(_IA64_REG_AR_KR1, r); break;	\
+	    case 2: ia64_setreg(_IA64_REG_AR_KR2, r); break;	\
+	    case 3: ia64_setreg(_IA64_REG_AR_KR3, r); break;	\
+	    case 4: ia64_setreg(_IA64_REG_AR_KR4, r); break;	\
+	    case 5: ia64_setreg(_IA64_REG_AR_KR5, r); break;	\
+	    case 6: ia64_setreg(_IA64_REG_AR_KR6, r); break;	\
+	    case 7: ia64_setreg(_IA64_REG_AR_KR7, r); break;	\
+	    default: ia64_setreg_unknown_kr(); break;		\
+	}							\
+})
+
+/*
+ * The following three macros can't be inline functions because we don't have struct
+ * task_struct at this point.
+ */
+
+/* Return TRUE if task T owns the fph partition of the CPU we're running on. */
+#define ia64_is_local_fpu_owner(t)								\
+({												\
+	struct task_struct *__ia64_islfo_task = (t);						\
+	(__ia64_islfo_task->thread.last_fph_cpu == smp_processor_id()				\
+	 && __ia64_islfo_task == (struct task_struct *) ia64_get_kr(IA64_KR_FPU_OWNER));	\
+})
+
+/* Mark task T as owning the fph partition of the CPU we're running on. */
+#define ia64_set_local_fpu_owner(t) do {						\
+	struct task_struct *__ia64_slfo_task = (t);					\
+	__ia64_slfo_task->thread.last_fph_cpu = smp_processor_id();			\
+	ia64_set_kr(IA64_KR_FPU_OWNER, (unsigned long) __ia64_slfo_task);		\
+} while (0)
+
+/* Mark the fph partition of task T as being invalid on all CPUs.  */
+#define ia64_drop_fpu(t)	((t)->thread.last_fph_cpu = -1)
+
+extern void __ia64_init_fpu (void);
+extern void __ia64_save_fpu (struct ia64_fpreg *fph);
+extern void __ia64_load_fpu (struct ia64_fpreg *fph);
+extern void ia64_save_debug_regs (unsigned long *save_area);
+extern void ia64_load_debug_regs (unsigned long *save_area);
+
+#ifdef CONFIG_IA32_SUPPORT
+extern void ia32_save_state (struct task_struct *task);
+extern void ia32_load_state (struct task_struct *task);
+#endif
+
+#define ia64_fph_enable()	do { ia64_rsm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
+#define ia64_fph_disable()	do { ia64_ssm(IA64_PSR_DFH); ia64_srlz_d(); } while (0)
+
+/* load fp 0.0 into fph */
+static inline void
+ia64_init_fpu (void) {
+	ia64_fph_enable();
+	__ia64_init_fpu();
+	ia64_fph_disable();
+}
+
+/* save f32-f127 at FPH */
+static inline void
+ia64_save_fpu (struct ia64_fpreg *fph) {
+	ia64_fph_enable();
+	__ia64_save_fpu(fph);
+	ia64_fph_disable();
+}
+
+/* load f32-f127 from FPH */
+static inline void
+ia64_load_fpu (struct ia64_fpreg *fph) {
+	ia64_fph_enable();
+	__ia64_load_fpu(fph);
+	ia64_fph_disable();
+}
+
+static inline __u64
+ia64_clear_ic (void)
+{
+	__u64 psr;
+	psr = ia64_getreg(_IA64_REG_PSR);
+	ia64_stop();
+	ia64_rsm(IA64_PSR_I | IA64_PSR_IC);
+	ia64_srlz_i();
+	return psr;
+}
+
+/*
+ * Restore the psr.
+ */
+static inline void
+ia64_set_psr (__u64 psr)
+{
+	ia64_stop();
+	ia64_setreg(_IA64_REG_PSR_L, psr);
+	ia64_srlz_d();
+}
+
+/*
+ * Insert a translation into an instruction and/or data translation
+ * register.
+ */
+static inline void
+ia64_itr (__u64 target_mask, __u64 tr_num,
+	  __u64 vmaddr, __u64 pte,
+	  __u64 log_page_size)
+{
+	ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
+	ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
+	ia64_stop();
+	if (target_mask & 0x1)
+		ia64_itri(tr_num, pte);
+	if (target_mask & 0x2)
+		ia64_itrd(tr_num, pte);
+}
+
+/*
+ * Insert a translation into the instruction and/or data translation
+ * cache.
+ */
+static inline void
+ia64_itc (__u64 target_mask, __u64 vmaddr, __u64 pte,
+	  __u64 log_page_size)
+{
+	ia64_setreg(_IA64_REG_CR_ITIR, (log_page_size << 2));
+	ia64_setreg(_IA64_REG_CR_IFA, vmaddr);
+	ia64_stop();
+	/* as per EAS2.6, itc must be the last instruction in an instruction group */
+	if (target_mask & 0x1)
+		ia64_itci(pte);
+	if (target_mask & 0x2)
+		ia64_itcd(pte);
+}
+
+/*
+ * Purge a range of addresses from instruction and/or data translation
+ * register(s).
+ */
+static inline void
+ia64_ptr (__u64 target_mask, __u64 vmaddr, __u64 log_size)
+{
+	if (target_mask & 0x1)
+		ia64_ptri(vmaddr, (log_size << 2));
+	if (target_mask & 0x2)
+		ia64_ptrd(vmaddr, (log_size << 2));
+}
+
+/* Set the interrupt vector address.  The address must be suitably aligned (32KB).  */
+static inline void
+ia64_set_iva (void *ivt_addr)
+{
+	ia64_setreg(_IA64_REG_CR_IVA, (__u64) ivt_addr);
+	ia64_srlz_i();
+}
+
+/* Set the page table address and control bits.  */
+static inline void
+ia64_set_pta (__u64 pta)
+{
+	/* Note: srlz.i implies srlz.d */
+	ia64_setreg(_IA64_REG_CR_PTA, pta);
+	ia64_srlz_i();
+}
+
+static inline void
+ia64_eoi (void)
+{
+	ia64_setreg(_IA64_REG_CR_EOI, 0);
+	ia64_srlz_d();
+}
+
+#define cpu_relax()	ia64_hint(ia64_hint_pause)
+
+static inline void
+ia64_set_lrr0 (unsigned long val)
+{
+	ia64_setreg(_IA64_REG_CR_LRR0, val);
+	ia64_srlz_d();
+}
+
+static inline void
+ia64_set_lrr1 (unsigned long val)
+{
+	ia64_setreg(_IA64_REG_CR_LRR1, val);
+	ia64_srlz_d();
+}
+
+
+/*
+ * Given the address to which a spill occurred, return the unat bit
+ * number that corresponds to this address.
+ */
+static inline __u64
+ia64_unat_pos (void *spill_addr)
+{
+	return ((__u64) spill_addr >> 3) & 0x3f;
+}
+
+/*
+ * Set the NaT bit of an integer register which was spilled at address
+ * SPILL_ADDR.  UNAT is the mask to be updated.
+ */
+static inline void
+ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat)
+{
+	__u64 bit = ia64_unat_pos(spill_addr);
+	__u64 mask = 1UL << bit;
+
+	*unat = (*unat & ~mask) | (nat << bit);
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ * Note that the only way T can block is through a call to schedule() -> switch_to().
+ */
+static inline unsigned long
+thread_saved_pc (struct task_struct *t)
+{
+	struct unw_frame_info info;
+	unsigned long ip;
+
+	unw_init_from_blocked_task(&info, t);
+	if (unw_unwind(&info) < 0)
+		return 0;
+	unw_get_ip(&info, &ip);
+	return ip;
+}
+
+/*
+ * Get the current instruction/program counter value.
+ */
+#define current_text_addr() \
+	({ void *_pc; _pc = (void *)ia64_getreg(_IA64_REG_IP); _pc; })
+
+static inline __u64
+ia64_get_ivr (void)
+{
+	__u64 r;
+	ia64_srlz_d();
+	r = ia64_getreg(_IA64_REG_CR_IVR);
+	ia64_srlz_d();
+	return r;
+}
+
+static inline void
+ia64_set_dbr (__u64 regnum, __u64 value)
+{
+	__ia64_set_dbr(regnum, value);
+#ifdef CONFIG_ITANIUM
+	ia64_srlz_d();
+#endif
+}
+
+static inline __u64
+ia64_get_dbr (__u64 regnum)
+{
+	__u64 retval;
+
+	retval = __ia64_get_dbr(regnum);
+#ifdef CONFIG_ITANIUM
+	ia64_srlz_d();
+#endif
+	return retval;
+}
+
+static inline __u64
+ia64_rotr (__u64 w, __u64 n)
+{
+	return (w >> n) | (w << (64 - n));
+}
+
+#define ia64_rotl(w,n)	ia64_rotr((w), (64) - (n))
+
+/*
+ * Take a mapped kernel address and return the equivalent address
+ * in the region 7 identity mapped virtual area.
+ */
+static inline void *
+ia64_imva (void *addr)
+{
+	void *result;
+	result = (void *) ia64_tpa(addr);
+	return __va(result);
+}
+
+#define ARCH_HAS_PREFETCH
+#define ARCH_HAS_PREFETCHW
+#define ARCH_HAS_SPINLOCK_PREFETCH
+#define PREFETCH_STRIDE			L1_CACHE_BYTES
+
+static inline void
+prefetch (const void *x)
+{
+	 ia64_lfetch(ia64_lfhint_none, x);
+}
+
+static inline void
+prefetchw (const void *x)
+{
+	ia64_lfetch_excl(ia64_lfhint_none, x);
+}
+
+#define spin_lock_prefetch(x)	prefetchw(x)
+
+extern unsigned long boot_option_idle_override;
+
+#endif /* !__ASSEMBLY__ */
+
+#endif /* _ASM_IA64_PROCESSOR_H */