* for more details.
*
* Copyright (C) 1994 Waldorf GMBH
- * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001 Ralf Baechle
+ * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
* Copyright (C) 1996 Paul M. Antoine
- * Copyright (C) 1999 Silicon Graphics, Inc.
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
#ifndef _ASM_PROCESSOR_H
#define _ASM_PROCESSOR_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
+ * Return current * instruction pointer ("program counter").
*/
-#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;
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
/*
- * 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.
+ * System setup and hardware flags..
*/
-#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
+extern void (*cpu_wait)(void);
-/*
- * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
- */
-#define IO_BITMAP_SIZE 32
+extern unsigned int vced_count, vcei_count;
#define NUM_FPU_REGS 32
-struct mips_fpu_hard_struct {
- double fp_regs[NUM_FPU_REGS];
- unsigned int control;
-};
+typedef __u64 fpureg_t;
/*
* It would be nice to add some more fields for emulator statistics, but there
* 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;
+struct mips_fpu_struct {
+ fpureg_t fpr[NUM_FPU_REGS];
+ unsigned int fcr31;
};
-#define INIT_FPU { \
- {{0,},} \
-}
+#define NUM_DSP_REGS 6
+
+typedef __u32 dspreg_t;
+
+struct mips_dsp_state {
+ dspreg_t dspr[NUM_DSP_REGS];
+ unsigned int dspcontrol;
+};
typedef struct {
unsigned long seg;
} mm_segment_t;
+#define ARCH_MIN_TASKALIGN 8
+
+struct mips_abi;
+
/*
* If you change thread_struct remember to change the #defines below too!
*/
unsigned long cp0_status;
/* Saved fpu/fpu emulator stuff. */
- union mips_fpu_union fpu;
+ struct mips_fpu_struct fpu;
+#ifdef CONFIG_MIPS_MT_FPAFF
+ /* Emulated instruction count */
+ unsigned long emulated_fp;
+ /* Saved per-thread scheduler affinity mask */
+ cpumask_t user_cpus_allowed;
+#endif /* CONFIG_MIPS_MT_FPAFF */
+
+ /* Saved state of the DSP ASE, if available. */
+ struct mips_dsp_state dsp;
/* 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;
+ struct mips_abi *abi;
};
-#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)
+struct task_struct;
/* 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)
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk) do { } 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__ */
+#define cpu_relax() barrier()
/*
* Return_address is a replacement for __builtin_return_address(count)
*/
#define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
+#ifdef CONFIG_CPU_HAS_PREFETCH
+
+#define ARCH_HAS_PREFETCH
+
+static inline void prefetch(const void *addr)
+{
+ __asm__ __volatile__(
+ " .set mips4 \n"
+ " pref %0, (%1) \n"
+ " .set mips0 \n"
+ :
+ : "i" (Pref_Load), "r" (addr));
+}
+
+#endif
+
#endif /* _ASM_PROCESSOR_H */
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