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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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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) * * vineetg: March 2009 * -Implemented task_pt_regs( ) * * Amit Bhor, Sameer Dhavale, Ashwin Chaugule: Codito Technologies 2004 */
#ifndef __ASM_ARC_PROCESSOR_H#define __ASM_ARC_PROCESSOR_H
#ifndef __ASSEMBLER__
#include <asm/ptrace.h>#include <asm/dsp.h>#include <asm/fpu.h>
/* Arch specific stuff which needs to be saved per task. * However these items are not so important so as to earn a place in * struct thread_info */struct thread_struct { unsigned long callee_reg; /* pointer to callee regs */ unsigned long fault_address; /* dbls as brkpt holder as well */#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS struct dsp_callee_regs dsp;#endif#ifdef CONFIG_ARC_FPU_SAVE_RESTORE struct arc_fpu fpu;#endif};
#define INIT_THREAD { }
/* Forward declaration, a strange C thing */struct task_struct;
#define task_pt_regs(p) \ ((struct pt_regs *)(THREAD_SIZE + (void *)task_stack_page(p)) - 1)
/* * A lot of busy-wait loops in SMP are based off of non-volatile data otherwise * get optimised away by gcc */#define cpu_relax() barrier()
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret)#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp)
/* * Where about of Task's sp, fp, blink when it was last seen in kernel mode. * Look in process.c for details of kernel stack layout */#define TSK_K_ESP(tsk) (task_thread_info(tsk)->ksp)
#define TSK_K_REG(tsk, off) (*((unsigned long *)(TSK_K_ESP(tsk) + \ sizeof(struct callee_regs) + off)))
#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0)
extern void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp);
extern unsigned int __get_wchan(struct task_struct *p);
#endif /* !__ASSEMBLER__ */
/* * Default System Memory Map on ARC * * ---------------------------- (lower 2G, Translated) ------------------------- * 0x0000_0000 0x5FFF_FFFF (user vaddr: TASK_SIZE) * 0x6000_0000 0x6FFF_FFFF (reserved gutter between U/K) * 0x7000_0000 0x7FFF_FFFF (kvaddr: vmalloc/modules/pkmap..) * * PAGE_OFFSET ---------------- (Upper 2G, Untranslated) ----------------------- * 0x8000_0000 0xBFFF_FFFF (kernel direct mapped) * 0xC000_0000 0xFFFF_FFFF (peripheral uncached space) * ----------------------------------------------------------------------------- */
#define TASK_SIZE 0x60000000
#define VMALLOC_START (PAGE_OFFSET - (CONFIG_ARC_KVADDR_SIZE << 20))
/* 1 PGDIR_SIZE each for fixmap/pkmap, 2 PGDIR_SIZE gutter (see asm/highmem.h) */#define VMALLOC_SIZE ((CONFIG_ARC_KVADDR_SIZE << 20) - PMD_SIZE * 4)
#define VMALLOC_END (VMALLOC_START + VMALLOC_SIZE)
#define USER_KERNEL_GUTTER (VMALLOC_START - TASK_SIZE)
#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 (TASK_SIZE / 3)
#endif /* __ASM_ARC_PROCESSOR_H */