Add missing Blackfin files.

1 files changed, 174 insertions, 0 deletions

diff --git a/include/asm-blackfin/processor.h b/include/asm-blackfin/processor.h
new file mode 100644
index 0000000000..19bd720106
--- /dev/null
+++ b/include/asm-blackfin/processor.h
@@ -0,0 +1,174 @@
+/*
+ * U-boot - processor.h
+ *
+ * Copyright (c) 2005 blackfin.uclinux.org
+ *
+ * This file is based on
+ * include/asm-m68k/processor.h
+ * Changes made by Akbar Hussain Lineo, Inc, May 2001 for BLACKFIN
+ * Copyright (C) 1995 Hamish Macdonald
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __ASM_BLACKFIN_PROCESSOR_H
+#define __ASM_BLACKFIN_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr()	({ __label__ _l; _l: &&_l;})
+
+#include <linux/config.h>
+#include <asm/segment.h>
+#include <asm/ptrace.h>
+#include <asm/current.h>
+
+extern inline unsigned long rdusp(void)
+{
+	unsigned long usp;
+
+	__asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));
+	return usp;
+}
+
+extern inline void wrusp(unsigned long usp)
+{
+	__asm__ __volatile__("usp = %0;\n\t"::"da"(usp));
+}
+
+/*
+ * User space process size: 3.75GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+#define TASK_SIZE		(0xF0000000UL)
+
+/*
+ * Bus types
+ */
+#define EISA_bus		0
+#define MCA_bus			0
+
+/*  There is no pc register avaliable for BLACKFIN, so we are going to get
+ *  it indirectly
+ */
+
+#if 0
+inline unsigned long obtain_pc_indirectly(void)
+{
+	unsigned long pc;
+	__asm__ __volatile__("%0 = rets;\n":"=d"(pc));
+	return (pc - 4);	/* call pcrel24 is 4 bytes long  */
+}
+#endif
+
+/*
+ * if you change this structure, you must change the code and offsets
+ * in m68k/machasm.S
+ */
+
+struct thread_struct {
+	unsigned long ksp;	/* kernel stack pointer */
+	unsigned long usp;	/* user stack pointer */
+	unsigned short seqstat;	/* saved status register */
+	unsigned long esp0;	/* points to SR of stack frame pt_regs */
+	unsigned long pc;	/* instruction pointer */
+};
+
+#define INIT_MMAP { &init_mm, 0, 0x40000000, NULL, __pgprot(_PAGE_PRESENT|_PAGE_ACCESSED), VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }
+
+#define INIT_THREAD  { \
+	sizeof(init_stack) + (unsigned long) init_stack, 0, \
+	PS_S, 0\
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ *
+ * pass the data segment into user programs if it exists,
+ * it can't hurt anything as far as I can tell
+ */
+#define start_thread(_regs, _pc, _usp)           \
+do {                                             \
+	set_fs(USER_DS); /* reads from user space */ \
+	(_regs)->pc = (_pc);                         \
+	if (current->mm)                             \
+		(_regs)->r5 = current->mm->start_data;   \
+	(_regs)->seqstat &= ~0x0c00;                      \
+	wrusp(_usp);                                 \
+	/* Adde by HuTao, May 26, 2003 3:39PM */\
+	if ((_regs)->ipend & 0x8000) /* check whether system in supper mode - StChen */\
+		(_regs)->ipend = 0x0;\
+} while(0)
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+extern int kernel_thread(int (*fn) (void *), void *arg,
+			 unsigned long flags);
+
+#define copy_segments(tsk, mm)		do { } while (0)
+#define release_segments(mm)		do { } while (0)
+#define forget_segments()		do { } while (0)
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+/*
+ * Return saved PC of a blocked thread.
+ */
+extern inline unsigned long thread_saved_pc(struct thread_struct *t)
+{
+	extern void scheduling_functions_start_here(void);
+	extern void scheduling_functions_end_here(void);
+	return 0;
+}
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define	KSTK_EIP(tsk)	\
+	({			\
+	unsigned long eip = 0;	 \
+	if ((tsk)->thread.esp0 > PAGE_SIZE && \
+		MAP_NR((tsk)->thread.esp0) < max_mapnr) \
+		eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+	eip; })
+#define	KSTK_ESP(tsk)	((tsk) == current ? rdusp() : (tsk)->thread.usp)
+#define THREAD_SIZE	(2*PAGE_SIZE)
+
+/* Allocation and freeing of basic task resources. */
+#define alloc_task_struct() \
+	((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
+#define free_task_struct(p)	free_pages((unsigned long)(p),1)
+#define get_task_struct(tsk)	atomic_inc(&mem_map[MAP_NR(tsk)].count)
+
+#define init_task		(init_task_union.task)
+#define init_stack		(init_task_union.stack)
+
+#endif