mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-30 13:38:40 +00:00
6e83557c38
r0_ram pool was used for saving/restoring register content if hw exception happen. This poll was replaced by pt_pool_space with PT_SIZE size. Based on this change SAVE_STATE_ARG_SPACE was removed which caused that PTO offset is zero that's why is also removed. r0_ram space was used as scratchpad by v850. In early Microblaze Linux developing phase was this part of code blindly copied. Signed-off-by: Michal Simek <monstr@monstr.eu>
175 lines
4.8 KiB
C
175 lines
4.8 KiB
C
/*
|
|
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2008-2009 PetaLogix
|
|
* Copyright (C) 2006 Atmark Techno, Inc.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#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 cpu_sleep() do {} while (0)
|
|
# define prepare_to_copy(tsk) do {} while (0)
|
|
|
|
#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);
|
|
|
|
# endif /* __ASSEMBLY__ */
|
|
|
|
# ifndef CONFIG_MMU
|
|
/*
|
|
* User space process size: memory size
|
|
*
|
|
* TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
|
|
* user processes and the kernel is on the same memory region. They
|
|
* both share the memory space and that is limited by the amount of
|
|
* physical memory. thus, we set TASK_SIZE == amount of total memory.
|
|
*/
|
|
# define TASK_SIZE (0x81000000 - 0x80000000)
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
# define current_text_addr() ({ __label__ _l; _l: &&_l; })
|
|
|
|
/*
|
|
* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's. We won't be using it
|
|
*/
|
|
# define TASK_UNMAPPED_BASE 0
|
|
|
|
/* definition in include/linux/sched.h */
|
|
struct task_struct;
|
|
|
|
/* thread_struct is gone. use thread_info instead. */
|
|
struct thread_struct { };
|
|
# define INIT_THREAD { }
|
|
|
|
/* Free all resources held by a thread. */
|
|
static inline void release_thread(struct task_struct *dead_task)
|
|
{
|
|
}
|
|
|
|
/* Free all resources held by a thread. */
|
|
static inline void exit_thread(void)
|
|
{
|
|
}
|
|
|
|
extern unsigned long thread_saved_pc(struct task_struct *t);
|
|
|
|
extern unsigned long get_wchan(struct task_struct *p);
|
|
|
|
/*
|
|
* create a kernel thread without removing it from tasklists
|
|
*/
|
|
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
# define KSTK_EIP(tsk) (0)
|
|
# define KSTK_ESP(tsk) (0)
|
|
|
|
# else /* CONFIG_MMU */
|
|
|
|
/*
|
|
* 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__
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
# define current_text_addr() ({ __label__ _l; _l: &&_l; })
|
|
|
|
/* 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, \
|
|
}
|
|
|
|
/* Do necessary setup to start up a newly executed thread. */
|
|
void start_thread(struct pt_regs *regs,
|
|
unsigned long pc, unsigned long usp);
|
|
|
|
/* Free all resources held by a thread. */
|
|
extern inline void release_thread(struct task_struct *dead_task)
|
|
{
|
|
}
|
|
|
|
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
/* Free current thread data structures etc. */
|
|
static inline void exit_thread(void)
|
|
{
|
|
}
|
|
|
|
/* Return saved (kernel) PC of a blocked thread. */
|
|
# define thread_saved_pc(tsk) \
|
|
((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
|
|
|
|
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))
|
|
|
|
/* FIXME */
|
|
# define deactivate_mm(tsk, mm) do { } while (0)
|
|
|
|
# define STACK_TOP TASK_SIZE
|
|
# define STACK_TOP_MAX STACK_TOP
|
|
|
|
# endif /* __ASSEMBLY__ */
|
|
# endif /* CONFIG_MMU */
|
|
#endif /* _ASM_MICROBLAZE_PROCESSOR_H */
|