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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#ifndef __ASM_SH_PROCESSOR_32_H#define __ASM_SH_PROCESSOR_32_H
#include <linux/compiler.h>#include <linux/linkage.h>#include <asm/page.h>#include <asm/types.h>#include <asm/hw_breakpoint.h>
/* Core Processor Version Register */#define CCN_PVR 0xff000030#define CCN_CVR 0xff000040#define CCN_PRR 0xff000044
/* * User space process size: 2GB. * * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff */#define TASK_SIZE 0x7c000000UL
#define STACK_TOP TASK_SIZE#define STACK_TOP_MAX STACK_TOP
/* 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)
/* * Bit of SR register * * FD-bit: * When it's set, it means the processor doesn't have right to use FPU, * and it results exception when the floating operation is executed. * * IMASK-bit: * Interrupt level mask */#define SR_DSP 0x00001000#define SR_IMASK 0x000000f0#define SR_FD 0x00008000#define SR_MD 0x40000000
#define SR_USER_MASK 0x00000303 // M, Q, S, T bits/* * DSP structure and data */struct sh_dsp_struct { unsigned long dsp_regs[14]; long status;};
/* * FPU structure and data */
struct sh_fpu_hard_struct { unsigned long fp_regs[16]; unsigned long xfp_regs[16]; unsigned long fpscr; unsigned long fpul;
long status; /* software status information */};
/* Dummy fpu emulator */struct sh_fpu_soft_struct { unsigned long fp_regs[16]; unsigned long xfp_regs[16]; unsigned long fpscr; unsigned long fpul;
unsigned char lookahead; unsigned long entry_pc;};
union thread_xstate { struct sh_fpu_hard_struct hardfpu; struct sh_fpu_soft_struct softfpu;};
struct thread_struct { /* Saved registers when thread is descheduled */ unsigned long sp; unsigned long pc;
/* Various thread flags, see SH_THREAD_xxx */ unsigned long flags;
/* Save middle states of ptrace breakpoints */ struct perf_event *ptrace_bps[HBP_NUM];
#ifdef CONFIG_SH_DSP /* Dsp status information */ struct sh_dsp_struct dsp_status;#endif
/* Extended processor state */ union thread_xstate *xstate;
/* * fpu_counter contains the number of consecutive context switches * that the FPU is used. If this is over a threshold, the lazy fpu * saving becomes unlazy to save the trap. This is an unsigned char * so that after 256 times the counter wraps and the behavior turns * lazy again; this to deal with bursty apps that only use FPU for * a short time */ unsigned char fpu_counter;};
#define INIT_THREAD { \ .sp = sizeof(init_stack) + (long) &init_stack, \ .flags = 0, \}
/* Forward declaration, a strange C thing */struct task_struct;
extern void start_thread(struct pt_regs *regs, unsigned long new_pc, unsigned long new_sp);
/* * FPU lazy state save handling. */
static __inline__ void disable_fpu(void){ unsigned long __dummy;
/* Set FD flag in SR */ __asm__ __volatile__("stc sr, %0\n\t" "or %1, %0\n\t" "ldc %0, sr" : "=&r" (__dummy) : "r" (SR_FD));}
static __inline__ void enable_fpu(void){ unsigned long __dummy;
/* Clear out FD flag in SR */ __asm__ __volatile__("stc sr, %0\n\t" "and %1, %0\n\t" "ldc %0, sr" : "=&r" (__dummy) : "r" (~SR_FD));}
/* Double presision, NANS as NANS, rounding to nearest, no exceptions */#define FPSCR_INIT 0x00080000
#define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */#define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
/* * Return saved PC of a blocked thread. */#define thread_saved_pc(tsk) (tsk->thread.pc)
void show_trace(struct task_struct *tsk, unsigned long *sp, struct pt_regs *regs, const char *loglvl);
#ifdef CONFIG_DUMP_CODEvoid show_code(struct pt_regs *regs);#elsestatic inline void show_code(struct pt_regs *regs){}#endif
extern unsigned long __get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)#define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15])
#if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH4)
#define PREFETCH_STRIDE L1_CACHE_BYTES#define ARCH_HAS_PREFETCH#define ARCH_HAS_PREFETCHW
static inline void prefetch(const void *x){ __builtin_prefetch(x, 0, 3);}
static inline void prefetchw(const void *x){ __builtin_prefetch(x, 1, 3);}#endif
#endif /* __ASM_SH_PROCESSOR_32_H */