include/asm-mips/processor.h - kernel/msm-4.9 - Gitiles

 /*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * Copyright (C) 1994 Waldorf GMBH
  * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
  * Copyright (C) 1996 Paul M. Antoine
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  */
 #ifndef _ASM_PROCESSOR_H
 #define _ASM_PROCESSOR_H

 #include <linux/cpumask.h>
 #include <linux/threads.h>

 #include <asm/cachectl.h>
 #include <asm/cpu.h>
 #include <asm/cpu-info.h>
 #include <asm/mipsregs.h>
 #include <asm/prefetch.h>
 #include <asm/system.h>

 /*
  * Return current * instruction pointer ("program counter").
  */
 #define current_text_addr() ({ __label__ _l; _l: &&_l;})

 /*
  * System setup and hardware flags..
  */
 extern void (*cpu_wait)(void);

 extern unsigned int vced_count, vcei_count;

 #ifdef CONFIG_32BIT
 /*
  * User space process size: 2GB. This is hardcoded into a few places,
  * so don't change it unless you know what you are doing.
  */
 #define TASK_SIZE	0x7fff8000UL

 /*
  * This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
 #define TASK_UNMAPPED_BASE	(PAGE_ALIGN(TASK_SIZE / 3))
 #endif

 #ifdef CONFIG_64BIT
 /*
  * User space process size: 1TB. This is hardcoded into a few places,
  * so don't change it unless you know what you are doing.  TASK_SIZE
  * is limited to 1TB by the R4000 architecture; R10000 and better can
  * support 16TB; the architectural reserve for future expansion is
  * 8192EB ...
  */
 #define TASK_SIZE32	0x7fff8000UL
 #define TASK_SIZE	0x10000000000UL

 /*
  * This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
 #define TASK_UNMAPPED_BASE	((current->thread.mflags & MF_32BIT_ADDR) ? \
 	PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3))
 #endif

 #define NUM_FPU_REGS	32

 typedef __u64 fpureg_t;

 /*
  * It would be nice to add some more fields for emulator statistics, but there
  * are a number of fixed offsets in offset.h and elsewhere that would have to
  * be recalculated by hand.  So the additional information will be private to
  * the FPU emulator for now.  See asm-mips/fpu_emulator.h.
  */

 struct mips_fpu_struct {
 	fpureg_t	fpr[NUM_FPU_REGS];
 	unsigned int	fcr31;
 };

 #define NUM_DSP_REGS   6

 typedef __u32 dspreg_t;

 struct mips_dsp_state {
 	dspreg_t        dspr[NUM_DSP_REGS];
 	unsigned int    dspcontrol;
 };

 #define INIT_CPUMASK { \
 	{0,} \
 }

 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!
  */
 struct thread_struct {
 	/* Saved main processor registers. */
 	unsigned long reg16;
 	unsigned long reg17, reg18, reg19, reg20, reg21, reg22, reg23;
 	unsigned long reg29, reg30, reg31;

 	/* Saved cp0 stuff. */
 	unsigned long cp0_status;

 	/* Saved fpu/fpu emulator stuff. */
 	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 */
 #define MF_32BIT_REGS	4		/* also implies 16/32 fprs */
 #define MF_32BIT_ADDR	8		/* 32-bit address space (o32/n32) */
 #define MF_FPUBOUND	0x10		/* thread bound to FPU-full CPU set */
 	unsigned long mflags;
 	unsigned long irix_trampoline;  /* Wheee... */
 	unsigned long irix_oldctx;
 	struct mips_abi *abi;
 };

 #define MF_ABI_MASK	(MF_32BIT_REGS | MF_32BIT_ADDR)
 #define MF_O32		(MF_32BIT_REGS | MF_32BIT_ADDR)
 #define MF_N32		MF_32BIT_ADDR
 #define MF_N64		0

 #ifdef CONFIG_MIPS_MT_FPAFF
 #define FPAFF_INIT						\
 	.emulated_fp			= 0,			\
 	.user_cpus_allowed		= INIT_CPUMASK,
 #else
 #define FPAFF_INIT
 #endif /* CONFIG_MIPS_MT_FPAFF */

 #define INIT_THREAD  {						\
         /*							\
          * Saved main processor registers			\
          */							\
 	.reg16			= 0,				\
 	.reg17			= 0,				\
 	.reg18			= 0,				\
 	.reg19			= 0,				\
 	.reg20			= 0,				\
 	.reg21			= 0,				\
 	.reg22			= 0,				\
 	.reg23			= 0,				\
 	.reg29			= 0,				\
 	.reg30			= 0,				\
 	.reg31			= 0,				\
 	/*							\
 	 * Saved cp0 stuff					\
 	 */							\
 	.cp0_status		= 0,				\
 	/*							\
 	 * Saved FPU/FPU emulator stuff				\
 	 */							\
 	.fpu			= {				\
 		.fpr		= {0,},				\
 		.fcr31		= 0,				\
 	},							\
 	/*							\
 	 * FPU affinity state (null if not FPAFF)		\
 	 */							\
 	FPAFF_INIT						\
 	/*							\
 	 * Saved DSP stuff					\
 	 */							\
 	.dsp			= {				\
 		.dspr		= {0, },			\
 		.dspcontrol	= 0,				\
 	},							\
 	/*							\
 	 * Other stuff associated with the process		\
 	 */							\
 	.cp0_badvaddr		= 0,				\
 	.cp0_baduaddr		= 0,				\
 	.error_code		= 0,				\
 	.trap_no		= 0,				\
 	/*							\
 	 * For now the default is to fix address errors		\
 	 */							\
 	.mflags			= MF_FIXADE,			\
 	.irix_trampoline	= 0,				\
 	.irix_oldctx		= 0,				\
 }

 struct task_struct;

 /* Free all resources held by a thread. */
 #define release_thread(thread) do { } while(0)

 /* Prepare to copy thread state - unlazy all lazy status */
 #define prepare_to_copy(tsk)	do { } while (0)

 extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);

 extern unsigned long thread_saved_pc(struct task_struct *tsk);

 /*
  * Do necessary setup to start up a newly executed thread.
  */
 extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp);

 unsigned long get_wchan(struct task_struct *p);

 #define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
 #define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk) - 1)
 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
 #define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)

 #define cpu_relax()	barrier()

 /*
  * Return_address is a replacement for __builtin_return_address(count)
  * which on certain architectures cannot reasonably be implemented in GCC
  * (MIPS, Alpha) or is unuseable with -fomit-frame-pointer (i386).
  * Note that __builtin_return_address(x>=1) is forbidden because GCC
  * aborts compilation on some CPUs.  It's simply not possible to unwind
  * some CPU's stackframes.
  *
  * __builtin_return_address works only for non-leaf functions.  We avoid the
  * overhead of a function call by forcing the compiler to save the return
  * address register on the stack.
  */
 #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 */
	/*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*
	* Copyright (C) 1994 Waldorf GMBH
	* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003 Ralf Baechle
	* Copyright (C) 1996 Paul M. Antoine
	* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
	*/
	#ifndef _ASM_PROCESSOR_H
	#define _ASM_PROCESSOR_H

	#include <linux/cpumask.h>
	#include <linux/threads.h>

	#include <asm/cachectl.h>
	#include <asm/cpu.h>
	#include <asm/cpu-info.h>
	#include <asm/mipsregs.h>
	#include <asm/prefetch.h>
	#include <asm/system.h>

	/*
	* Return current * instruction pointer ("program counter").
	*/
	#define current_text_addr() ({ __label__ _l; _l: &&_l;})

	/*
	* System setup and hardware flags..
	*/
	extern void (*cpu_wait)(void);

	extern unsigned int vced_count, vcei_count;

	#ifdef CONFIG_32BIT
	/*
	* User space process size: 2GB. This is hardcoded into a few places,
	* so don't change it unless you know what you are doing.
	*/
	#define TASK_SIZE 0x7fff8000UL

	/*
	* This decides where the kernel will search for a free chunk of vm
	* space during mmap's.
	*/
	#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
	#endif

	#ifdef CONFIG_64BIT
	/*
	* User space process size: 1TB. This is hardcoded into a few places,
	* so don't change it unless you know what you are doing. TASK_SIZE
	* is limited to 1TB by the R4000 architecture; R10000 and better can
	* support 16TB; the architectural reserve for future expansion is
	* 8192EB ...
	*/
	#define TASK_SIZE32 0x7fff8000UL
	#define TASK_SIZE 0x10000000000UL

	/*
	* This decides where the kernel will search for a free chunk of vm
	* space during mmap's.
	*/
	#define TASK_UNMAPPED_BASE ((current->thread.mflags & MF_32BIT_ADDR) ? \
	PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3))
	#endif

	#define NUM_FPU_REGS 32

	typedef __u64 fpureg_t;

	/*
	* It would be nice to add some more fields for emulator statistics, but there
	* are a number of fixed offsets in offset.h and elsewhere that would have to
	* be recalculated by hand. So the additional information will be private to
	* the FPU emulator for now. See asm-mips/fpu_emulator.h.
	*/

	struct mips_fpu_struct {
	fpureg_t fpr[NUM_FPU_REGS];
	unsigned int fcr31;
	};

	#define NUM_DSP_REGS 6

	typedef __u32 dspreg_t;

	struct mips_dsp_state {
	dspreg_t dspr[NUM_DSP_REGS];
	unsigned int dspcontrol;
	};

	#define INIT_CPUMASK { \
	{0,} \
	}

	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!
	*/
	struct thread_struct {
	/* Saved main processor registers. */
	unsigned long reg16;
	unsigned long reg17, reg18, reg19, reg20, reg21, reg22, reg23;
	unsigned long reg29, reg30, reg31;

	/* Saved cp0 stuff. */
	unsigned long cp0_status;

	/* Saved fpu/fpu emulator stuff. */
	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 */
	#define MF_32BIT_REGS 4 /* also implies 16/32 fprs */
	#define MF_32BIT_ADDR 8 /* 32-bit address space (o32/n32) */
	#define MF_FPUBOUND 0x10 /* thread bound to FPU-full CPU set */
	unsigned long mflags;
	unsigned long irix_trampoline; /* Wheee... */
	unsigned long irix_oldctx;
	struct mips_abi *abi;
	};

	#define MF_ABI_MASK (MF_32BIT_REGS \| MF_32BIT_ADDR)
	#define MF_O32 (MF_32BIT_REGS \| MF_32BIT_ADDR)
	#define MF_N32 MF_32BIT_ADDR
	#define MF_N64 0

	#ifdef CONFIG_MIPS_MT_FPAFF
	#define FPAFF_INIT \
	.emulated_fp = 0, \
	.user_cpus_allowed = INIT_CPUMASK,
	#else
	#define FPAFF_INIT
	#endif /* CONFIG_MIPS_MT_FPAFF */

	#define INIT_THREAD { \
	/* \
	* Saved main processor registers \
	*/ \
	.reg16 = 0, \
	.reg17 = 0, \
	.reg18 = 0, \
	.reg19 = 0, \
	.reg20 = 0, \
	.reg21 = 0, \
	.reg22 = 0, \
	.reg23 = 0, \
	.reg29 = 0, \
	.reg30 = 0, \
	.reg31 = 0, \
	/* \
	* Saved cp0 stuff \
	*/ \
	.cp0_status = 0, \
	/* \
	* Saved FPU/FPU emulator stuff \
	*/ \
	.fpu = { \
	.fpr = {0,}, \
	.fcr31 = 0, \
	}, \
	/* \
	* FPU affinity state (null if not FPAFF) \
	*/ \
	FPAFF_INIT \
	/* \
	* Saved DSP stuff \
	*/ \
	.dsp = { \
	.dspr = {0, }, \
	.dspcontrol = 0, \
	}, \
	/* \
	* Other stuff associated with the process \
	*/ \
	.cp0_badvaddr = 0, \
	.cp0_baduaddr = 0, \
	.error_code = 0, \
	.trap_no = 0, \
	/* \
	* For now the default is to fix address errors \
	*/ \
	.mflags = MF_FIXADE, \
	.irix_trampoline = 0, \
	.irix_oldctx = 0, \
	}

	struct task_struct;

	/* Free all resources held by a thread. */
	#define release_thread(thread) do { } while(0)

	/* Prepare to copy thread state - unlazy all lazy status */
	#define prepare_to_copy(tsk) do { } while (0)

	extern long kernel_thread(int (fn)(void ), void * arg, unsigned long flags);

	extern unsigned long thread_saved_pc(struct task_struct *tsk);

	/*
	* Do necessary setup to start up a newly executed thread.
	*/
	extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp);

	unsigned long get_wchan(struct task_struct *p);

	#define __KSTK_TOS(tsk) ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
	#define task_pt_regs(tsk) ((struct pt_regs *)__KSTK_TOS(tsk) - 1)
	#define KSTK_EIP(tsk) (task_pt_regs(tsk)->cp0_epc)
	#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[29])
	#define KSTK_STATUS(tsk) (task_pt_regs(tsk)->cp0_status)

	#define cpu_relax() barrier()

	/*
	* Return_address is a replacement for __builtin_return_address(count)
	* which on certain architectures cannot reasonably be implemented in GCC
	* (MIPS, Alpha) or is unuseable with -fomit-frame-pointer (i386).
	* Note that __builtin_return_address(x>=1) is forbidden because GCC
	* aborts compilation on some CPUs. It's simply not possible to unwind
	* some CPU's stackframes.
	*
	* __builtin_return_address works only for non-leaf functions. We avoid the
	* overhead of a function call by forcing the compiler to save the return
	* address register on the stack.
	*/
	#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 */