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81 lines
2.3 KiB
81 lines
2.3 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* OpenRISC Linux |
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* |
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* Linux architectural port borrowing liberally from similar works of |
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* others. All original copyrights apply as per the original source |
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* declaration. |
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* |
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* OpenRISC implementation: |
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* Copyright (C) 2003 Matjaz Breskvar <[email protected]> |
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* Copyright (C) 2010-2011 Jonas Bonn <[email protected]> |
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* et al. |
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*/ |
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#ifndef __ASM_OPENRISC_PROCESSOR_H |
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#define __ASM_OPENRISC_PROCESSOR_H |
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#include <asm/spr_defs.h> |
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#include <asm/page.h> |
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#include <asm/ptrace.h> |
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#define STACK_TOP TASK_SIZE |
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#define STACK_TOP_MAX STACK_TOP |
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/* Kernel and user SR register setting */ |
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#define KERNEL_SR (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \ |
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| SPR_SR_DCE | SPR_SR_SM) |
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#define USER_SR (SPR_SR_DME | SPR_SR_IME | SPR_SR_ICE \ |
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| SPR_SR_DCE | SPR_SR_IEE | SPR_SR_TEE) |
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/* |
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* User space process size. This is hardcoded into a few places, |
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* so don't change it unless you know what you are doing. |
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*/ |
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#define TASK_SIZE (0x80000000UL) |
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/* This decides where the kernel will search for a free chunk of vm |
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* space during mmap's. |
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*/ |
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#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) |
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#ifndef __ASSEMBLY__ |
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struct task_struct; |
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struct thread_struct { |
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}; |
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/* |
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* At user->kernel entry, the pt_regs struct is stacked on the top of the |
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* kernel-stack. This macro allows us to find those regs for a task. |
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* Notice that subsequent pt_regs stackings, like recursive interrupts |
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* occurring while we're in the kernel, won't affect this - only the first |
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* user->kernel transition registers are reached by this (i.e. not regs |
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* for running signal handler) |
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*/ |
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#define user_regs(thread_info) (((struct pt_regs *)((unsigned long)(thread_info) + THREAD_SIZE - STACK_FRAME_OVERHEAD)) - 1) |
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/* |
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* Dito but for the currently running task |
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*/ |
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#define task_pt_regs(task) user_regs(task_thread_info(task)) |
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#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) |
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#define INIT_THREAD { } |
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#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) |
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#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp) |
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void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp); |
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void release_thread(struct task_struct *); |
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unsigned long get_wchan(struct task_struct *p); |
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#define cpu_relax() barrier() |
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#endif /* __ASSEMBLY__ */ |
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#endif /* __ASM_OPENRISC_PROCESSOR_H */
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