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Add missing Blackfin files.
This commit is contained in:
Wolfgang Denk
174
include/asm-blackfin/processor.h
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174
include/asm-blackfin/processor.h
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/*
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* U-boot - processor.h
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*
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* Copyright (c) 2005 blackfin.uclinux.org
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*
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* This file is based on
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* include/asm-m68k/processor.h
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* Changes made by Akbar Hussain Lineo, Inc, May 2001 for BLACKFIN
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* Copyright (C) 1995 Hamish Macdonald
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __ASM_BLACKFIN_PROCESSOR_H
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#define __ASM_BLACKFIN_PROCESSOR_H
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter").
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*/
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#define current_text_addr() ({ __label__ _l; _l: &&_l;})
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#include <linux/config.h>
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#include <asm/segment.h>
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#include <asm/ptrace.h>
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#include <asm/current.h>
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extern inline unsigned long rdusp(void)
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{
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unsigned long usp;
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__asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));
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return usp;
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}
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extern inline void wrusp(unsigned long usp)
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{
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__asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
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}
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/*
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* User space process size: 3.75GB. 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 (0xF0000000UL)
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/*
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* Bus types
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*/
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#define EISA_bus 0
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#define MCA_bus 0
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/* There is no pc register avaliable for BLACKFIN, so we are going to get
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* it indirectly
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*/
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#if 0
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inline unsigned long obtain_pc_indirectly(void)
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{
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unsigned long pc;
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__asm__ __volatile__("%0 = rets;\n":"=d"(pc));
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return (pc - 4); /* call pcrel24 is 4 bytes long */
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}
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#endif
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/*
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* if you change this structure, you must change the code and offsets
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* in m68k/machasm.S
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*/
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struct thread_struct {
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unsigned long ksp; /* kernel stack pointer */
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unsigned long usp; /* user stack pointer */
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unsigned short seqstat; /* saved status register */
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unsigned long esp0; /* points to SR of stack frame pt_regs */
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unsigned long pc; /* instruction pointer */
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};
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#define INIT_MMAP { &init_mm, 0, 0x40000000, NULL, __pgprot(_PAGE_PRESENT|_PAGE_ACCESSED), VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
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#define INIT_THREAD { \
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sizeof(init_stack) + (unsigned long) init_stack, 0, \
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PS_S, 0\
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}
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/*
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* Do necessary setup to start up a newly executed thread.
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*
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* pass the data segment into user programs if it exists,
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* it can't hurt anything as far as I can tell
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*/
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#define start_thread(_regs, _pc, _usp) \
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do { \
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set_fs(USER_DS); /* reads from user space */ \
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(_regs)->pc = (_pc); \
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if (current->mm) \
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(_regs)->r5 = current->mm->start_data; \
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(_regs)->seqstat &= ~0x0c00; \
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wrusp(_usp); \
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/* Adde by HuTao, May 26, 2003 3:39PM */\
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if ((_regs)->ipend & 0x8000) /* check whether system in supper mode - StChen */\
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(_regs)->ipend = 0x0;\
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} while(0)
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/* Forward declaration, a strange C thing */
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struct task_struct;
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/* Free all resources held by a thread. */
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static inline void release_thread(struct task_struct *dead_task)
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{
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}
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extern int kernel_thread(int (*fn) (void *), void *arg,
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unsigned long flags);
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#define copy_segments(tsk, mm) do { } while (0)
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#define release_segments(mm) do { } while (0)
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#define forget_segments() do { } while (0)
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/*
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* Free current thread data structures etc..
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*/
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static inline void exit_thread(void)
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{
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}
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/*
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* Return saved PC of a blocked thread.
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*/
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extern inline unsigned long thread_saved_pc(struct thread_struct *t)
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{
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extern void scheduling_functions_start_here(void);
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extern void scheduling_functions_end_here(void);
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return 0;
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}
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unsigned long get_wchan(struct task_struct *p);
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#define KSTK_EIP(tsk) \
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({ \
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unsigned long eip = 0; \
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if ((tsk)->thread.esp0 > PAGE_SIZE && \
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MAP_NR((tsk)->thread.esp0) < max_mapnr) \
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eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
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eip; })
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#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
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#define THREAD_SIZE (2*PAGE_SIZE)
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/* Allocation and freeing of basic task resources. */
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#define alloc_task_struct() \
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((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
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#define free_task_struct(p) free_pages((unsigned long)(p),1)
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#define get_task_struct(tsk) atomic_inc(&mem_map[MAP_NR(tsk)].count)
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#define init_task (init_task_union.task)
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#define init_stack (init_task_union.stack)
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#endif
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