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diff --git a/include/asm-mips/processor.h b/include/asm-mips/processor.h
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+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 Waldorf GMBH
+ * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001 Ralf Baechle
+ * Copyright (C) 1996 Paul M. Antoine
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PROCESSOR_H
+#define _ASM_PROCESSOR_H
+
+#include <linux/config.h>
+
+#include <asm/isadep.h>
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#if !defined (_LANGUAGE_ASSEMBLY)
+#if 0
+#include <linux/threads.h>
+#endif
+#include <asm/cachectl.h>
+#include <asm/mipsregs.h>
+#include <asm/reg.h>
+#include <asm/system.h>
+
+struct mips_cpuinfo {
+ unsigned long udelay_val;
+ unsigned long *pgd_quick;
+ unsigned long *pte_quick;
+ unsigned long pgtable_cache_sz;
+};
+
+/*
+ * System setup and hardware flags..
+ * XXX: Should go into mips_cpuinfo.
+ */
+extern void (*cpu_wait)(void); /* only available on R4[26]00 and R3081 */
+extern void r3081_wait(void);
+extern void r4k_wait(void);
+extern char cyclecounter_available; /* only available from R4000 upwards. */
+
+extern struct mips_cpuinfo boot_cpu_data;
+extern unsigned int vced_count, vcei_count;
+
+#ifdef CONFIG_SMP
+extern struct mips_cpuinfo cpu_data[];
+#define current_cpu_data cpu_data[smp_processor_id()]
+#else
+#define cpu_data &boot_cpu_data
+#define current_cpu_data boot_cpu_data
+#endif
+
+/*
+ * Bus types (default is ISA, but people can check others with these..)
+ * MCA_bus hardcoded to 0 for now.
+ *
+ * This needs to be extended since MIPS systems are being delivered with
+ * numerous different types of bus systems.
+ */
+extern int EISA_bus;
+#define MCA_bus 0
+#define MCA_bus__is_a_macro /* for versions in ksyms.c */
+
+/*
+ * MIPS has no problems with write protection
+ */
+#define wp_works_ok 1
+#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
+
+/* Lazy FPU handling on uni-processor */
+extern struct task_struct *last_task_used_math;
+
+/*
+ * User space process size: 2GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing. TASK_SIZE
+ * for a 64 bit kernel expandable to 8192EB, of which the current MIPS
+ * implementations will "only" be able to use 1TB ...
+ */
+#define TASK_SIZE (0x7fff8000UL)
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+
+/*
+ * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
+ */
+#define IO_BITMAP_SIZE 32
+
+#define NUM_FPU_REGS 32
+
+struct mips_fpu_hard_struct {
+ double fp_regs[NUM_FPU_REGS];
+ unsigned int control;
+};
+
+/*
+ * It would be nice to add some more fields for emulator statistics, but there
+ * are a number of fixed offsets in offset.h and elsewhere that would have to
+ * be recalculated by hand. So the additional information will be private to
+ * the FPU emulator for now. See asm-mips/fpu_emulator.h.
+ */
+typedef u64 fpureg_t;
+struct mips_fpu_soft_struct {
+ fpureg_t regs[NUM_FPU_REGS];
+ unsigned int sr;
+};
+
+union mips_fpu_union {
+ struct mips_fpu_hard_struct hard;
+ struct mips_fpu_soft_struct soft;
+};
+
+#define INIT_FPU { \
+ {{0,},} \
+}
+
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+/*
+ * If you change thread_struct remember to change the #defines below too!
+ */
+struct thread_struct {
+ /* Saved main processor registers. */
+ unsigned long reg16;
+ unsigned long reg17, reg18, reg19, reg20, reg21, reg22, reg23;
+ unsigned long reg29, reg30, reg31;
+
+ /* Saved cp0 stuff. */
+ unsigned long cp0_status;
+
+ /* Saved fpu/fpu emulator stuff. */
+ union mips_fpu_union fpu;
+
+ /* Other stuff associated with the thread. */
+ unsigned long cp0_badvaddr; /* Last user fault */
+ unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
+ unsigned long error_code;
+ unsigned long trap_no;
+#define MF_FIXADE 1 /* Fix address errors in software */
+#define MF_LOGADE 2 /* Log address errors to syslog */
+ unsigned long mflags;
+ mm_segment_t current_ds;
+ unsigned long irix_trampoline; /* Wheee... */
+ unsigned long irix_oldctx;
+
+ /*
+ * These are really only needed if the full FPU emulator is configured.
+ * Would be made conditional on MIPS_FPU_EMULATOR if it weren't for the
+ * fact that having offset.h rebuilt differently for different config
+ * options would be asking for trouble.
+ *
+ * Saved EPC during delay-slot emulation (see math-emu/cp1emu.c)
+ */
+ unsigned long dsemul_epc;
+
+ /*
+ * Pointer to instruction used to induce address error
+ */
+ unsigned long dsemul_aerpc;
+};
+
+#endif /* !defined (_LANGUAGE_ASSEMBLY) */
+
+#define INIT_THREAD { \
+ /* \
+ * saved main processor registers \
+ */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, \
+ 0, 0, 0, \
+ /* \
+ * saved cp0 stuff \
+ */ \
+ 0, \
+ /* \
+ * saved fpu/fpu emulator stuff \
+ */ \
+ INIT_FPU, \
+ /* \
+ * Other stuff associated with the process \
+ */ \
+ 0, 0, 0, 0, \
+ /* \
+ * For now the default is to fix address errors \
+ */ \
+ MF_FIXADE, { 0 }, 0, 0, \
+ /* \
+ * dsemul_epc and dsemul_aerpc should never be used uninitialized, \
+ * but... \
+ */ \
+ 0 ,0 \
+}
+
+#ifdef __KERNEL__
+
+#define KERNEL_STACK_SIZE 8192
+
+#if !defined (_LANGUAGE_ASSEMBLY)
+
+/* Free all resources held by a thread. */
+#define release_thread(thread) do { } while(0)
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/* Copy and release all segment info associated with a VM */
+#define copy_segments(p, mm) do { } while(0)
+#define release_segments(mm) do { } while(0)
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+extern inline unsigned long thread_saved_pc(struct thread_struct *t)
+{
+ extern void ret_from_fork(void);
+
+ /* New born processes are a special case */
+ if (t->reg31 == (unsigned long) ret_from_fork)
+ return t->reg31;
+
+ return ((unsigned long *)t->reg29)[10];
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+#define start_thread(regs, new_pc, new_sp) do { \
+ /* New thread looses kernel privileges. */ \
+ regs->cp0_status = (regs->cp0_status & ~(ST0_CU0|ST0_KSU)) | KU_USER;\
+ regs->cp0_epc = new_pc; \
+ regs->regs[29] = new_sp; \
+ current->thread.current_ds = USER_DS; \
+} while (0)
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define __PT_REG(reg) ((long)&((struct pt_regs *)0)->reg - sizeof(struct pt_regs))
+#define __KSTK_TOS(tsk) ((unsigned long)(tsk) + KERNEL_STACK_SIZE - 32)
+#define KSTK_EIP(tsk) (*(unsigned long *)(__KSTK_TOS(tsk) + __PT_REG(cp0_epc)))
+#define KSTK_ESP(tsk) (*(unsigned long *)(__KSTK_TOS(tsk) + __PT_REG(regs[29])))
+
+/* Allocation and freeing of basic task resources. */
+/*
+ * NOTE! The task struct and the stack go together
+ */
+#define THREAD_SIZE (2*PAGE_SIZE)
+#define alloc_task_struct() \
+ ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
+#define free_task_struct(p) free_pages((unsigned long)(p),1)
+#define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
+
+#define init_task (init_task_union.task)
+#define init_stack (init_task_union.stack)
+
+#define cpu_relax() do { } while (0)
+
+#endif /* !defined (_LANGUAGE_ASSEMBLY) */
+#endif /* __KERNEL__ */
+
+/*
+ * Return_address is a replacement for __builtin_return_address(count)
+ * which on certain architectures cannot reasonably be implemented in GCC
+ * (MIPS, Alpha) or is unuseable with -fomit-frame-pointer (i386).
+ * Note that __builtin_return_address(x>=1) is forbidden because GCC
+ * aborts compilation on some CPUs. It's simply not possible to unwind
+ * some CPU's stackframes.
+ *
+ * __builtin_return_address works only for non-leaf functions. We avoid the
+ * overhead of a function call by forcing the compiler to save the return
+ * address register on the stack.
+ */
+#define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
+
+#endif /* _ASM_PROCESSOR_H */