/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. */ #ifndef _ASM_MICROBLAZE_PROCESSOR_H #define _ASM_MICROBLAZE_PROCESSOR_H #include <asm/ptrace.h> #include <asm/setup.h> #include <asm/registers.h> #include <asm/entry.h> #include <asm/current.h> # ifndef __ASSEMBLY__ /* from kernel/cpu/mb.c */ extern const struct seq_operations cpuinfo_op; # define cpu_relax() barrier() #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) /* Do necessary setup to start up a newly executed thread. */ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); extern void ret_from_fork(void); extern void ret_from_kernel_thread(void); # endif /* __ASSEMBLY__ */ /* * This is used to define STACK_TOP, and with MMU it must be below * kernel base to select the correct PGD when handling MMU exceptions. */ # define TASK_SIZE (CONFIG_KERNEL_START) /* * 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) # define THREAD_KSP 0 # ifndef __ASSEMBLY__ /* If you change this, you must change the associated assembly-languages * constants defined below, THREAD_*. */ struct thread_struct { /* kernel stack pointer (must be first field in structure) */ unsigned long ksp; unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ void *pgdir; /* root of page-table tree */ struct pt_regs *regs; /* Pointer to saved register state */ }; # define INIT_THREAD { \ .ksp = sizeof init_stack + (unsigned long)init_stack, \ .pgdir = swapper_pg_dir, \ } /* Free all resources held by a thread. */ static inline void release_thread(struct task_struct *dead_task) { } unsigned long get_wchan(struct task_struct *p); /* The size allocated for kernel stacks. This _must_ be a power of two! */ # define KERNEL_STACK_SIZE 0x2000 /* Return some info about the user process TASK. */ # define task_tos(task) ((unsigned long)(task) + KERNEL_STACK_SIZE) # define task_regs(task) ((struct pt_regs *)task_tos(task) - 1) # define task_pt_regs_plus_args(tsk) \ ((void *)task_pt_regs(tsk)) # define task_sp(task) (task_regs(task)->r1) # define task_pc(task) (task_regs(task)->pc) /* Grotty old names for some. */ # define KSTK_EIP(task) (task_pc(task)) # define KSTK_ESP(task) (task_sp(task)) # define STACK_TOP TASK_SIZE # define STACK_TOP_MAX STACK_TOP #ifdef CONFIG_DEBUG_FS extern struct dentry *of_debugfs_root; #endif # endif /* __ASSEMBLY__ */ #endif /* _ASM_MICROBLAZE_PROCESSOR_H */