#ifndef _ASM_POWERPC_PROCESSOR_H#define _ASM_POWERPC_PROCESSOR_H /* * Copyright (C) 2001 PPC 64 Team, IBM Corp * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/config.h>#include <asm/reg.h> #ifndef __ASSEMBLY__#include <linux/compiler.h>#include <asm/ptrace.h>#include <asm/types.h> /* We do _not_ want to define new machine types at all, those must die * in favor of using the device-tree * -- BenH. */ /* Platforms codes (to be obsoleted) */#define PLATFORM_PSERIES	0x0100#define PLATFORM_PSERIES_LPAR	0x0101#define PLATFORM_ISERIES_LPAR	0x0201#define PLATFORM_LPAR		0x0001#define PLATFORM_POWERMAC	0x0400#define PLATFORM_MAPLE		0x0500#define PLATFORM_PREP		0x0600#define PLATFORM_CHRP		0x0700#define PLATFORM_CELL		0x1000 /* Compat platform codes for 32 bits */#define _MACH_prep	PLATFORM_PREP#define _MACH_Pmac	PLATFORM_POWERMAC#define _MACH_chrp	PLATFORM_CHRP /* PREP sub-platform types see residual.h for these */#define _PREP_Motorola	0x01	/* motorola prep */#define _PREP_Firm	0x02	/* firmworks prep */#define _PREP_IBM	0x00	/* ibm prep */#define _PREP_Bull	0x03	/* bull prep */ /* CHRP sub-platform types. These are arbitrary */#define _CHRP_Motorola	0x04	/* motorola chrp, the cobra */#define _CHRP_IBM	0x05	/* IBM chrp, the longtrail and longtrail 2 */#define _CHRP_Pegasos	0x06	/* Genesi/bplan's Pegasos and Pegasos2 */ #define platform_is_pseries()	(_machine == PLATFORM_PSERIES || \				 _machine == PLATFORM_PSERIES_LPAR)#define platform_is_lpar()	(!!(_machine & PLATFORM_LPAR)) #if defined(CONFIG_PPC_MULTIPLATFORM)extern int _machine; #ifdef CONFIG_PPC32 /* what kind of prep workstation we are */extern int _prep_type;extern int _chrp_type; /* * This is used to identify the board type from a given PReP board * vendor. Board revision is also made available. This will be moved * elsewhere soon */extern unsigned char ucSystemType;extern unsigned char ucBoardRev;extern unsigned char ucBoardRevMaj, ucBoardRevMin; #endif /* CONFIG_PPC32 */ #elif defined(CONFIG_PPC_ISERIES)/* * iSeries is soon to become MULTIPLATFORM hopefully ... */#define _machine PLATFORM_ISERIES_LPAR#else#define _machine 0#endif /* CONFIG_PPC_MULTIPLATFORM */ /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ __label__ _l; _l: &&_l;}) /* Macros for adjusting thread priority (hardware multi-threading) */#define HMT_very_low()   asm volatile("or 31,31,31   # very low priority")#define HMT_low()	 asm volatile("or 1,1,1	     # low priority")#define HMT_medium_low() asm volatile("or 6,6,6      # medium low priority")#define HMT_medium()	 asm volatile("or 2,2,2	     # medium priority")#define HMT_medium_high() asm volatile("or 5,5,5      # medium high priority")#define HMT_high()	 asm volatile("or 3,3,3	     # high priority") #ifdef __KERNEL__ extern int have_of; struct task_struct;void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);void release_thread(struct task_struct *); /* Prepare to copy thread state - unlazy all lazy status */extern void prepare_to_copy(struct task_struct *tsk); /* Create a new kernel thread. */extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); /* Lazy FPU handling on uni-processor */extern struct task_struct *last_task_used_math;extern struct task_struct *last_task_used_altivec;extern struct task_struct *last_task_used_spe; #ifdef CONFIG_PPC32#define TASK_SIZE	(CONFIG_TASK_SIZE) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3)#endif #ifdef CONFIG_PPC64/* 64-bit user address space is 44-bits (16TB user VM) */#define TASK_SIZE_USER64 (0x0000100000000000UL) /*  * 32-bit user address space is 4GB - 1 page  * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT */#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE)) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \		TASK_SIZE_USER32 : TASK_SIZE_USER64) /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(TASK_SIZE_USER64 / 4)) #define TASK_UNMAPPED_BASE ((test_thread_flag(TIF_32BIT)) ? \		TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )#endif typedef struct {	unsigned long seg;} mm_segment_t; struct thread_struct {	unsigned long	ksp;		/* Kernel stack pointer */#ifdef CONFIG_PPC64	unsigned long	ksp_vsid;#endif	struct pt_regs	*regs;		/* Pointer to saved register state */	mm_segment_t	fs;		/* for get_fs() validation */#ifdef CONFIG_PPC32	void		*pgdir;		/* root of page-table tree */	signed long	last_syscall;#endif#if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)	unsigned long	dbcr0;		/* debug control register values */	unsigned long	dbcr1;#endif	double		fpr[32];	/* Complete floating point set */	struct {			/* fpr ... fpscr must be contiguous */ 		unsigned int pad;		unsigned int val;	/* Floating point status */	} fpscr;	int		fpexc_mode;	/* floating-point exception mode */#ifdef CONFIG_PPC64	unsigned long	start_tb;	/* Start purr when proc switched in */	unsigned long	accum_tb;	/* Total accumilated purr for process */#endif	unsigned long	vdso_base;	/* base of the vDSO library */	unsigned long	dabr;		/* Data address breakpoint register */#ifdef CONFIG_ALTIVEC	/* Complete AltiVec register set */	vector128	vr[32] __attribute((aligned(16)));	/* AltiVec status */	vector128	vscr __attribute((aligned(16)));	unsigned long	vrsave;	int		used_vr;	/* set if process has used altivec */#endif /* CONFIG_ALTIVEC */#ifdef CONFIG_SPE	unsigned long	evr[32];	/* upper 32-bits of SPE regs */	u64		acc;		/* Accumulator */	unsigned long	spefscr;	/* SPE & eFP status */	int		used_spe;	/* set if process has used spe */#endif /* CONFIG_SPE */}; #define ARCH_MIN_TASKALIGN 16 #define INIT_SP		(sizeof(init_stack) + (unsigned long) &init_stack)  #ifdef CONFIG_PPC32#define INIT_THREAD { \	.ksp = INIT_SP, \	.fs = KERNEL_DS, \	.pgdir = swapper_pg_dir, \	.fpexc_mode = MSR_FE0 | MSR_FE1, \}#else#define INIT_THREAD  { \	.ksp = INIT_SP, \	.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \	.fs = KERNEL_DS, \	.fpr = {0}, \	.fpscr = { .val = 0, }, \	.fpexc_mode = MSR_FE0|MSR_FE1, \}#endif /* * Return saved PC of a blocked thread. For now, this is the "user" PC */#define thread_saved_pc(tsk)    \        ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0) unsigned long get_wchan(struct task_struct *p); #define KSTK_EIP(tsk)  ((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)#define KSTK_ESP(tsk)  ((tsk)->thread.regs? (tsk)->thread.regs->gpr[1]: 0) /* Get/set floating-point exception mode */#define GET_FPEXC_CTL(tsk, adr) get_fpexc_mode((tsk), (adr))#define SET_FPEXC_CTL(tsk, val) set_fpexc_mode((tsk), (val)) extern int get_fpexc_mode(struct task_struct *tsk, unsigned long adr);extern int set_fpexc_mode(struct task_struct *tsk, unsigned int val); static inline unsigned int __unpack_fe01(unsigned long msr_bits){	return ((msr_bits & MSR_FE0) >> 10) | ((msr_bits & MSR_FE1) >> 8);} static inline unsigned long __pack_fe01(unsigned int fpmode){	return ((fpmode << 10) & MSR_FE0) | ((fpmode << 8) & MSR_FE1);} #ifdef CONFIG_PPC64#define cpu_relax()	do { HMT_low(); HMT_medium(); barrier(); } while (0)#else#define cpu_relax()	barrier()#endif /* * Prefetch macros. */#define ARCH_HAS_PREFETCH#define ARCH_HAS_PREFETCHW#define ARCH_HAS_SPINLOCK_PREFETCH static inline void prefetch(const void *x){	if (unlikely(!x))		return; 	__asm__ __volatile__ ("dcbt 0,%0" : : "r" (x));} static inline void prefetchw(const void *x){	if (unlikely(!x))		return; 	__asm__ __volatile__ ("dcbtst 0,%0" : : "r" (x));} #define spin_lock_prefetch(x)	prefetchw(x) #ifdef CONFIG_PPC64#define HAVE_ARCH_PICK_MMAP_LAYOUT#endif #endif /* __KERNEL__ */#endif /* __ASSEMBLY__ */#endif /* _ASM_POWERPC_PROCESSOR_H */