#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 <asm/reg.h> #ifdef CONFIG_VSX#define TS_FPRWIDTH 2#else#define TS_FPRWIDTH 1#endif #ifndef __ASSEMBLY__#include <linux/compiler.h>#include <linux/cache.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. */ /* 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 _CHRP_briq	0x07	/* TotalImpact's briQ */ #if defined(__KERNEL__) && defined(CONFIG_PPC32) extern int _chrp_type; #ifdef CONFIG_PPC_PREP /* what kind of prep workstation we are */extern int _prep_type; #endif /* CONFIG_PPC_PREP */ #endif /* defined(__KERNEL__) && defined(CONFIG_PPC32) */ /* * 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__ 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_vsx;extern struct task_struct *last_task_used_spe; #ifdef CONFIG_PPC32 #if CONFIG_TASK_SIZE > CONFIG_KERNEL_START#error User TASK_SIZE overlaps with KERNEL_START address#endif#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_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \		TASK_SIZE_USER32 : TASK_SIZE_USER64)#define TASK_SIZE	  TASK_SIZE_OF(current) /* 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 ((is_32bit_task()) ? \		TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )#endif #ifdef __powerpc64__ #define STACK_TOP_USER64 TASK_SIZE_USER64#define STACK_TOP_USER32 TASK_SIZE_USER32 #define STACK_TOP (is_32bit_task() ? \		   STACK_TOP_USER32 : STACK_TOP_USER64) #define STACK_TOP_MAX STACK_TOP_USER64 #else /* __powerpc64__ */ #define STACK_TOP TASK_SIZE#define STACK_TOP_MAX	STACK_TOP #endif /* __powerpc64__ */ typedef struct {	unsigned long seg;} mm_segment_t; #define TS_FPROFFSET 0#define TS_VSRLOWOFFSET 1#define TS_FPR(i) fpr[i][TS_FPROFFSET] struct thread_struct {	unsigned long	ksp;		/* Kernel stack pointer */	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */ #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_BOOKE	/* BookE base exception scratch space; align on cacheline */	unsigned long	normsave[8] ____cacheline_aligned;#endif#ifdef CONFIG_PPC32	void		*pgdir;		/* root of page-table tree */#endif#ifdef CONFIG_PPC_ADV_DEBUG_REGS	/*	 * The following help to manage the use of Debug Control Registers	 * om the BookE platforms.	 */	unsigned long	dbcr0;	unsigned long	dbcr1;#ifdef CONFIG_BOOKE	unsigned long	dbcr2;#endif	/*	 * The stored value of the DBSR register will be the value at the	 * last debug interrupt. This register can only be read from the	 * user (will never be written to) and has value while helping to	 * describe the reason for the last debug trap.  Torez	 */	unsigned long	dbsr;	/*	 * The following will contain addresses used by debug applications	 * to help trace and trap on particular address locations.	 * The bits in the Debug Control Registers above help define which	 * of the following registers will contain valid data and/or addresses.	 */	unsigned long	iac1;	unsigned long	iac2;#if CONFIG_PPC_ADV_DEBUG_IACS > 2	unsigned long	iac3;	unsigned long	iac4;#endif	unsigned long	dac1;	unsigned long	dac2;#if CONFIG_PPC_ADV_DEBUG_DVCS > 0	unsigned long	dvc1;	unsigned long	dvc2;#endif#endif	/* FP and VSX 0-31 register set */	double		fpr[32][TS_FPRWIDTH];	struct { 		unsigned int pad;		unsigned int val;	/* Floating point status */	} fpscr;	int		fpexc_mode;	/* floating-point exception mode */	unsigned int	align_ctl;	/* alignment handling control */#ifdef CONFIG_PPC64	unsigned long	start_tb;	/* Start purr when proc switched in */	unsigned long	accum_tb;	/* Total accumilated purr for process */#ifdef CONFIG_HAVE_HW_BREAKPOINT	struct perf_event *ptrace_bps[HBP_NUM];	/*	 * Helps identify source of single-step exception and subsequent	 * hw-breakpoint enablement	 */	struct perf_event *last_hit_ubp;#endif /* CONFIG_HAVE_HW_BREAKPOINT */#endif	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_VSX	/* VSR status */	int		used_vsr;	/* set if process has used altivec */#endif /* CONFIG_VSX */#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 */#ifdef CONFIG_KVM_BOOK3S_32_HANDLER	void*		kvm_shadow_vcpu; /* KVM internal data */#endif /* CONFIG_KVM_BOOK3S_32_HANDLER */#ifdef CONFIG_PPC64	unsigned long	dscr;	int		dscr_inherit;#endif}; #define ARCH_MIN_TASKALIGN 16 #define INIT_SP		(sizeof(init_stack) + (unsigned long) &init_stack)#define INIT_SP_LIMIT \	(_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack) #ifdef CONFIG_SPE#define SPEFSCR_INIT .spefscr = SPEFSCR_FINVE | SPEFSCR_FDBZE | SPEFSCR_FUNFE | SPEFSCR_FOVFE,#else#define SPEFSCR_INIT#endif #ifdef CONFIG_PPC32#define INIT_THREAD { \	.ksp = INIT_SP, \	.ksp_limit = INIT_SP_LIMIT, \	.fs = KERNEL_DS, \	.pgdir = swapper_pg_dir, \	.fpexc_mode = MSR_FE0 | MSR_FE1, \	SPEFSCR_INIT \}#else#define INIT_THREAD  { \	.ksp = INIT_SP, \	.ksp_limit = INIT_SP_LIMIT, \	.regs = (struct pt_regs *)INIT_SP - 1, /* XXX bogus, I think */ \	.fs = KERNEL_DS, \	.fpr = {{0}}, \	.fpscr = { .val = 0, }, \	.fpexc_mode = 0, \}#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) #define task_pt_regs(tsk)	((struct pt_regs *)(tsk)->thread.regs) 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); #define GET_ENDIAN(tsk, adr) get_endian((tsk), (adr))#define SET_ENDIAN(tsk, val) set_endian((tsk), (val)) extern int get_endian(struct task_struct *tsk, unsigned long adr);extern int set_endian(struct task_struct *tsk, unsigned int val); #define GET_UNALIGN_CTL(tsk, adr)	get_unalign_ctl((tsk), (adr))#define SET_UNALIGN_CTL(tsk, val)	set_unalign_ctl((tsk), (val)) extern int get_unalign_ctl(struct task_struct *tsk, unsigned long adr);extern int set_unalign_ctl(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 /* Check that a certain kernel stack pointer is valid in task_struct p */int validate_sp(unsigned long sp, struct task_struct *p,                       unsigned long nbytes); /* * 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 #ifdef CONFIG_PPC64static inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32){	unsigned long sp; 	if (is_32)		sp = regs->gpr[1] & 0x0ffffffffUL;	else		sp = regs->gpr[1]; 	return sp;}#elsestatic inline unsigned long get_clean_sp(struct pt_regs *regs, int is_32){	return regs->gpr[1];}#endif extern unsigned long cpuidle_disable;enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF}; extern int powersave_nap;	/* set if nap mode can be used in idle loop */void cpu_idle_wait(void); #ifdef CONFIG_PSERIES_IDLEextern void update_smt_snooze_delay(int snooze);extern int pseries_notify_cpuidle_add_cpu(int cpu);#elsestatic inline void update_smt_snooze_delay(int snooze) {}static inline int pseries_notify_cpuidle_add_cpu(int cpu) { return 0; }#endif extern void flush_instruction_cache(void);extern void hard_reset_now(void);extern void poweroff_now(void);extern int fix_alignment(struct pt_regs *);extern void cvt_fd(float *from, double *to);extern void cvt_df(double *from, float *to);extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); #ifdef CONFIG_PPC64/* * We handle most unaligned accesses in hardware. On the other hand  * unaligned DMA can be very expensive on some ppc64 IO chips (it does * powers of 2 writes until it reaches sufficient alignment). * * Based on this we disable the IP header alignment in network drivers. */#define NET_IP_ALIGN	0#endif #endif /* __KERNEL__ */#endif /* __ASSEMBLY__ */#endif /* _ASM_POWERPC_PROCESSOR_H */