diff options
Diffstat (limited to 'include/asm-mips/processor.h')
| -rw-r--r-- | include/asm-mips/processor.h | 249 |
1 files changed, 54 insertions, 195 deletions
diff --git a/include/asm-mips/processor.h b/include/asm-mips/processor.h index 6838aee..24858dd 100644 --- a/include/asm-mips/processor.h +++ b/include/asm-mips/processor.h @@ -4,9 +4,9 @@ * 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 @@ -15,92 +15,26 @@ #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 @@ -108,25 +42,29 @@ struct mips_fpu_hard_struct { * 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! */ @@ -140,131 +78,36 @@ struct thread_struct { 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) @@ -280,4 +123,20 @@ unsigned long get_wchan(struct task_struct *p); */ #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 */ |