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Diffstat (limited to 'arch/sh/include/asm/processor_64.h')
| -rw-r--r-- | arch/sh/include/asm/processor_64.h | 212 |
1 files changed, 0 insertions, 212 deletions
diff --git a/arch/sh/include/asm/processor_64.h b/arch/sh/include/asm/processor_64.h deleted file mode 100644 index 53efc9f51ef1..000000000000 --- a/arch/sh/include/asm/processor_64.h +++ /dev/null @@ -1,212 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef __ASM_SH_PROCESSOR_64_H -#define __ASM_SH_PROCESSOR_64_H - -/* - * include/asm-sh/processor_64.h - * - * Copyright (C) 2000, 2001 Paolo Alberelli - * Copyright (C) 2003 Paul Mundt - * Copyright (C) 2004 Richard Curnow - */ -#ifndef __ASSEMBLY__ - -#include <linux/compiler.h> -#include <asm/page.h> -#include <asm/types.h> -#include <cpu/registers.h> - -#endif - -/* - * User space process size: 2GB - 4k. - */ -#define TASK_SIZE 0x7ffff000UL - -#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 - * - * STEP-bit: - * Single step bit - * - */ -#if defined(CONFIG_SH64_SR_WATCH) -#define SR_MMU 0x84000000 -#else -#define SR_MMU 0x80000000 -#endif - -#define SR_IMASK 0x000000f0 -#define SR_FD 0x00008000 -#define SR_SSTEP 0x08000000 - -#ifndef __ASSEMBLY__ - -/* - * FPU structure and data : require 8-byte alignment as we need to access it - with fld.p, fst.p - */ - -struct sh_fpu_hard_struct { - unsigned long fp_regs[64]; - unsigned int fpscr; - /* long status; * software status information */ -}; - -/* Dummy fpu emulator */ -struct sh_fpu_soft_struct { - unsigned long fp_regs[64]; - unsigned int fpscr; - unsigned char lookahead; - unsigned long entry_pc; -}; - -union thread_xstate { - struct sh_fpu_hard_struct hardfpu; - struct sh_fpu_soft_struct softfpu; - /* - * The structure definitions only produce 32 bit alignment, yet we need - * to access them using 64 bit load/store as well. - */ - unsigned long long alignment_dummy; -}; - -struct thread_struct { - unsigned long sp; - unsigned long pc; - - /* Various thread flags, see SH_THREAD_xxx */ - unsigned long flags; - - /* This stores the address of the pt_regs built during a context - switch, or of the register save area built for a kernel mode - exception. It is used for backtracing the stack of a sleeping task - or one that traps in kernel mode. */ - struct pt_regs *kregs; - /* This stores the address of the pt_regs constructed on entry from - user mode. It is a fixed value over the lifetime of a process, or - NULL for a kernel thread. */ - struct pt_regs *uregs; - - unsigned long address; - /* Hardware debugging registers may come here */ - - /* floating point info */ - 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_MMAP \ -{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } - -#define INIT_THREAD { \ - .sp = sizeof(init_stack) + \ - (long) &init_stack, \ - .pc = 0, \ - .kregs = &fake_swapper_regs, \ - .uregs = NULL, \ - .address = 0, \ - .flags = 0, \ -} - -/* - * Do necessary setup to start up a newly executed thread. - */ -#define SR_USER (SR_MMU | SR_FD) - -#define start_thread(_regs, new_pc, new_sp) \ - _regs->sr = SR_USER; /* User mode. */ \ - _regs->pc = new_pc - 4; /* Compensate syscall exit */ \ - _regs->pc |= 1; /* Set SHmedia ! */ \ - _regs->regs[18] = 0; \ - _regs->regs[15] = new_sp - -/* Forward declaration, a strange C thing */ -struct task_struct; -struct mm_struct; - -/* Free all resources held by a thread. */ -extern void release_thread(struct task_struct *); - -/* - * FPU lazy state save handling. - */ - -static inline void disable_fpu(void) -{ - unsigned long long __dummy; - - /* Set FD flag in SR */ - __asm__ __volatile__("getcon " __SR ", %0\n\t" - "or %0, %1, %0\n\t" - "putcon %0, " __SR "\n\t" - : "=&r" (__dummy) - : "r" (SR_FD)); -} - -static inline void enable_fpu(void) -{ - unsigned long long __dummy; - - /* Clear out FD flag in SR */ - __asm__ __volatile__("getcon " __SR ", %0\n\t" - "and %0, %1, %0\n\t" - "putcon %0, " __SR "\n\t" - : "=&r" (__dummy) - : "r" (~SR_FD)); -} - -/* Round to nearest, no exceptions on inexact, overflow, underflow, - zero-divide, invalid. Configure option for whether to flush denorms to - zero, or except if a denorm is encountered. */ -#if defined(CONFIG_SH64_FPU_DENORM_FLUSH) -#define FPSCR_INIT 0x00040000 -#else -#define FPSCR_INIT 0x00000000 -#endif - -#ifdef CONFIG_SH_FPU -/* Initialise the FP state of a task */ -void fpinit(struct sh_fpu_hard_struct *fpregs); -#else -#define fpinit(fpregs) do { } while (0) -#endif - -extern struct task_struct *last_task_used_math; - -/* - * Return saved PC of a blocked thread. - */ -#define thread_saved_pc(tsk) (tsk->thread.pc) - -extern unsigned long get_wchan(struct task_struct *p); - -#define KSTK_EIP(tsk) ((tsk)->thread.pc) -#define KSTK_ESP(tsk) ((tsk)->thread.sp) - -#endif /* __ASSEMBLY__ */ -#endif /* __ASM_SH_PROCESSOR_64_H */ |