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@@ -4,9 +4,9 @@
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* for more details.
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*
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* Copyright (C) 1994 Waldorf GMBH
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- * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001 Ralf Baechle
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+ * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
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* Copyright (C) 1996 Paul M. Antoine
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- * Copyright (C) 1999 Silicon Graphics, Inc.
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+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PROCESSOR_H
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#define _ASM_PROCESSOR_H
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@@ -15,92 +15,26 @@
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#include <asm/isadep.h>
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-/*
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- * Default implementation of macro that returns current
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- * instruction pointer ("program counter").
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- */
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-#define current_text_addr() ({ __label__ _l; _l: &&_l;})
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-
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-#if !defined (_LANGUAGE_ASSEMBLY)
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-#if 0
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-#include <linux/threads.h>
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-#endif
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#include <asm/cachectl.h>
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#include <asm/mipsregs.h>
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#include <asm/reg.h>
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#include <asm/system.h>
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-struct mips_cpuinfo {
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- unsigned long udelay_val;
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- unsigned long *pgd_quick;
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- unsigned long *pte_quick;
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- unsigned long pgtable_cache_sz;
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-};
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-
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-/*
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- * System setup and hardware flags..
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- * XXX: Should go into mips_cpuinfo.
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- */
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-extern void (*cpu_wait)(void); /* only available on R4[26]00 and R3081 */
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-extern void r3081_wait(void);
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-extern void r4k_wait(void);
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-extern char cyclecounter_available; /* only available from R4000 upwards. */
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-
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-extern struct mips_cpuinfo boot_cpu_data;
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-extern unsigned int vced_count, vcei_count;
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-
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-#ifdef CONFIG_SMP
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-extern struct mips_cpuinfo cpu_data[];
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-#define current_cpu_data cpu_data[smp_processor_id()]
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-#else
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-#define cpu_data &boot_cpu_data
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-#define current_cpu_data boot_cpu_data
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-#endif
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-
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-/*
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- * Bus types (default is ISA, but people can check others with these..)
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- * MCA_bus hardcoded to 0 for now.
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- *
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- * This needs to be extended since MIPS systems are being delivered with
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- * numerous different types of bus systems.
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- */
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-extern int EISA_bus;
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-#define MCA_bus 0
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-#define MCA_bus__is_a_macro /* for versions in ksyms.c */
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-
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/*
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- * MIPS has no problems with write protection
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+ * Return current * instruction pointer ("program counter").
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*/
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-#define wp_works_ok 1
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-#define wp_works_ok__is_a_macro /* for versions in ksyms.c */
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-
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-/* Lazy FPU handling on uni-processor */
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-extern struct task_struct *last_task_used_math;
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+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
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/*
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- * User space process size: 2GB. This is hardcoded into a few places,
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- * so don't change it unless you know what you are doing. TASK_SIZE
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- * for a 64 bit kernel expandable to 8192EB, of which the current MIPS
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- * implementations will "only" be able to use 1TB ...
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- */
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-#define TASK_SIZE (0x7fff8000UL)
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-
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-/* This decides where the kernel will search for a free chunk of vm
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- * space during mmap's.
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+ * System setup and hardware flags..
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*/
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-#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
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+extern void (*cpu_wait)(void);
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-/*
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- * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
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- */
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-#define IO_BITMAP_SIZE 32
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+extern unsigned int vced_count, vcei_count;
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#define NUM_FPU_REGS 32
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-struct mips_fpu_hard_struct {
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- double fp_regs[NUM_FPU_REGS];
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- unsigned int control;
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-};
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+typedef __u64 fpureg_t;
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/*
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* It would be nice to add some more fields for emulator statistics, but there
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@@ -108,25 +42,29 @@ struct mips_fpu_hard_struct {
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* be recalculated by hand. So the additional information will be private to
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* the FPU emulator for now. See asm-mips/fpu_emulator.h.
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*/
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-typedef u64 fpureg_t;
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-struct mips_fpu_soft_struct {
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- fpureg_t regs[NUM_FPU_REGS];
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- unsigned int sr;
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-};
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-union mips_fpu_union {
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- struct mips_fpu_hard_struct hard;
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- struct mips_fpu_soft_struct soft;
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+struct mips_fpu_struct {
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+ fpureg_t fpr[NUM_FPU_REGS];
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+ unsigned int fcr31;
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};
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-#define INIT_FPU { \
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- {{0,},} \
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-}
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+#define NUM_DSP_REGS 6
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+
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+typedef __u32 dspreg_t;
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+
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+struct mips_dsp_state {
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+ dspreg_t dspr[NUM_DSP_REGS];
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+ unsigned int dspcontrol;
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+};
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typedef struct {
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unsigned long seg;
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} mm_segment_t;
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+#define ARCH_MIN_TASKALIGN 8
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+
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+struct mips_abi;
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+
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/*
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* If you change thread_struct remember to change the #defines below too!
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*/
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@@ -140,131 +78,36 @@ struct thread_struct {
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unsigned long cp0_status;
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/* Saved fpu/fpu emulator stuff. */
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- union mips_fpu_union fpu;
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+ struct mips_fpu_struct fpu;
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+#ifdef CONFIG_MIPS_MT_FPAFF
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+ /* Emulated instruction count */
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+ unsigned long emulated_fp;
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+ /* Saved per-thread scheduler affinity mask */
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+ cpumask_t user_cpus_allowed;
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+#endif /* CONFIG_MIPS_MT_FPAFF */
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+
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+ /* Saved state of the DSP ASE, if available. */
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+ struct mips_dsp_state dsp;
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/* Other stuff associated with the thread. */
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unsigned long cp0_badvaddr; /* Last user fault */
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unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */
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unsigned long error_code;
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unsigned long trap_no;
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-#define MF_FIXADE 1 /* Fix address errors in software */
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-#define MF_LOGADE 2 /* Log address errors to syslog */
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- unsigned long mflags;
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- mm_segment_t current_ds;
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unsigned long irix_trampoline; /* Wheee... */
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unsigned long irix_oldctx;
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-
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- /*
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- * These are really only needed if the full FPU emulator is configured.
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- * Would be made conditional on MIPS_FPU_EMULATOR if it weren't for the
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- * fact that having offset.h rebuilt differently for different config
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- * options would be asking for trouble.
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- *
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- * Saved EPC during delay-slot emulation (see math-emu/cp1emu.c)
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- */
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- unsigned long dsemul_epc;
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-
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- /*
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- * Pointer to instruction used to induce address error
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- */
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- unsigned long dsemul_aerpc;
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+ struct mips_abi *abi;
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};
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-#endif /* !defined (_LANGUAGE_ASSEMBLY) */
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-
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-#define INIT_THREAD { \
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- /* \
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- * saved main processor registers \
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- */ \
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- 0, 0, 0, 0, 0, 0, 0, 0, \
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- 0, 0, 0, \
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- /* \
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- * saved cp0 stuff \
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- */ \
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- 0, \
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- /* \
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- * saved fpu/fpu emulator stuff \
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- */ \
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- INIT_FPU, \
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- /* \
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- * Other stuff associated with the process \
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- */ \
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- 0, 0, 0, 0, \
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- /* \
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- * For now the default is to fix address errors \
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- */ \
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- MF_FIXADE, { 0 }, 0, 0, \
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- /* \
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- * dsemul_epc and dsemul_aerpc should never be used uninitialized, \
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- * but... \
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- */ \
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- 0 ,0 \
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-}
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-
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-#ifdef __KERNEL__
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-
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-#define KERNEL_STACK_SIZE 8192
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-
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-#if !defined (_LANGUAGE_ASSEMBLY)
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+struct task_struct;
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/* Free all resources held by a thread. */
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#define release_thread(thread) do { } while(0)
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-extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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-
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-/* Copy and release all segment info associated with a VM */
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-#define copy_segments(p, mm) do { } while(0)
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-#define release_segments(mm) do { } while(0)
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-
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-/*
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- * Return saved PC of a blocked thread.
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- */
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-extern inline unsigned long thread_saved_pc(struct thread_struct *t)
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-{
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- extern void ret_from_fork(void);
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-
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- /* New born processes are a special case */
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- if (t->reg31 == (unsigned long) ret_from_fork)
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- return t->reg31;
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-
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- return ((unsigned long *)t->reg29)[10];
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-}
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-
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-/*
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- * Do necessary setup to start up a newly executed thread.
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- */
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-#define start_thread(regs, new_pc, new_sp) do { \
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- /* New thread looses kernel privileges. */ \
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- regs->cp0_status = (regs->cp0_status & ~(ST0_CU0|ST0_KSU)) | KU_USER;\
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- regs->cp0_epc = new_pc; \
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- regs->regs[29] = new_sp; \
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- current->thread.current_ds = USER_DS; \
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-} while (0)
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+/* Prepare to copy thread state - unlazy all lazy status */
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+#define prepare_to_copy(tsk) do { } while (0)
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-unsigned long get_wchan(struct task_struct *p);
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-
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-#define __PT_REG(reg) ((long)&((struct pt_regs *)0)->reg - sizeof(struct pt_regs))
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-#define __KSTK_TOS(tsk) ((unsigned long)(tsk) + KERNEL_STACK_SIZE - 32)
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-#define KSTK_EIP(tsk) (*(unsigned long *)(__KSTK_TOS(tsk) + __PT_REG(cp0_epc)))
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-#define KSTK_ESP(tsk) (*(unsigned long *)(__KSTK_TOS(tsk) + __PT_REG(regs[29])))
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-
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-/* Allocation and freeing of basic task resources. */
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-/*
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- * NOTE! The task struct and the stack go together
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- */
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-#define THREAD_SIZE (2*PAGE_SIZE)
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-#define alloc_task_struct() \
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- ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
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-#define free_task_struct(p) free_pages((unsigned long)(p),1)
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-#define get_task_struct(tsk) atomic_inc(&virt_to_page(tsk)->count)
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-
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-#define init_task (init_task_union.task)
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-#define init_stack (init_task_union.stack)
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-
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-#define cpu_relax() do { } while (0)
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-
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-#endif /* !defined (_LANGUAGE_ASSEMBLY) */
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-#endif /* __KERNEL__ */
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+#define cpu_relax() barrier()
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/*
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* Return_address is a replacement for __builtin_return_address(count)
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@@ -280,4 +123,20 @@ unsigned long get_wchan(struct task_struct *p);
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*/
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#define return_address() ({__asm__ __volatile__("":::"$31");__builtin_return_address(0);})
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+#ifdef CONFIG_CPU_HAS_PREFETCH
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+
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+#define ARCH_HAS_PREFETCH
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+
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+static inline void prefetch(const void *addr)
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+{
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+ __asm__ __volatile__(
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+ " .set mips4 \n"
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+ " pref %0, (%1) \n"
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+ " .set mips0 \n"
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+ :
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+ : "i" (Pref_Load), "r" (addr));
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+}
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+
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+#endif
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+
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#endif /* _ASM_PROCESSOR_H */
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Shinya Kuribayashi