path: root/arch/ia64/include/asm/processor.h

#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 <asm/intrinsics.h>
#include <asm/kregs.h>
#include <asm/ptrace.h>
#include <asm/ustack.h>

#define __ARCH_WANT_UNLOCKED_CTXSW
#define ARCH_HAS_PREFETCH_SWITCH_STACK

#define IA64_NUM_PHYS_STACK_REG	96
#define IA64_NUM_DBG_REGS	8

#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_OF(tsk)	((tsk)->thread.task_size)
#define TASK_SIZE       	TASK_SIZE_OF(current)

/*
 * 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. */
#define IA64_THREAD_MIGRATION	(__IA64_UL(1) << 5)	/* require migration
							   sync at ctx sw */
#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 <linux/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;
};

union ia64_isr {
	__u64  val;
	struct {
		__u64 code : 16;
		__u64 vector : 8;
		__u64 reserved1 : 8;
		__u64 x : 1;
		__u64 w : 1;
		__u64 r : 1;
		__u64 na : 1;
		__u64 sp : 1;
		__u64 rs : 1;
		__u64 ir : 1;
		__u64 ni : 1;
		__u64 so : 1;
		__u64 ei : 2;
		__u64 ed : 1;
		__u64 reserved2 : 20;
	};
};

union ia64_lid {
	__u64 val;
	struct {
		__u64  rv  : 16;
		__u64  eid : 8;
		__u64  id  : 8;
		__u64  ig  : 32;
	};
};

union ia64_tpr {
	__u64 val;
	struct {
		__u64 ig0 : 4;
		__u64 mic : 4;
		__u64 rsv : 8;
		__u64 mmi : 1;
		__u64 ig1 : 47;
	};
};

union ia64_itir {
	__u64 val;
	struct {
		__u64 rv3  :  2; /* 0-1 */
		__u64 ps   :  6; /* 2-7 */
		__u64 key  : 24; /* 8-31 */
		__u64 rv4  : 32; /* 32-63 */
	};
};

union  ia64_rr {
	__u64 val;
	struct {
		__u64  ve	:  1;  /* enable hw walker */
		__u64  reserved0:  1;  /* reserved */
		__u64  ps	:  6;  /* log page size */
		__u64  rid	: 24;  /* region id */
		__u64  reserved1: 32;  /* reserved */
	};
};

/*
 * CPU type, hardware bug flags, and per-CPU state.  Frequently used
 * state comes earlier:
 */
struct cpuinfo_ia64 {
	unsigned int softirq_pending;
	unsigned long itm_delta;	/* # of clock cycles between clock ticks */
	unsigned long itm_next;		/* interval timer mask value to use for next clock tick */
	unsigned long nsec_per_cyc;	/* (1000000000<<IA64_NSEC_PER_CYC_SHIFT)/itc_freq */
	unsigned long unimpl_va_mask;	/* mask of unimplemented virtual address bits (from PAL) */
	unsigned long unimpl_pa_mask;	/* mask of unimplemented physical address bits (from PAL) */
	unsigned long itc_freq;		/* frequency of ITC counter */
	unsigned long proc_freq;	/* frequency of processor */
	unsigned long cyc_per_usec;	/* itc_freq/1000000 */
	unsigned long ptce_base;
	unsigned int ptce_count[2];
	unsigned int ptce_stride[2];
	struct task_struct *ksoftirqd;	/* kernel softirq daemon for this CPU */

#ifdef CONFIG_SMP
	unsigned long loops_per_jiffy;
	int cpu;
	unsigned int socket_id;	/* physical processor socket id */
	unsigned short core_id;	/* core id */
	unsigned short thread_id; /* thread id */
	unsigned short num_log;	/* Total number of logical processors on
				 * this socket that were successfully booted */
	unsigned char cores_per_socket;	/* Cores per processor socket */
	unsigned char threads_per_core;	/* Threads per core */
#endif

	/* CPUID-derived information: */
	unsigned long ppn;
	unsigned long features;
	unsigned char number;
	unsigned char revision;
	unsigned char model;
	unsigned char family;
	unsigned char archrev;
	char vendor[16];
	char *model_name;

#ifdef CONFIG_NUMA
	struct ia64_node_data *node_data;
#endif
};

DECLARE_PER_CPU(struct cpuinfo_ia64