1 files changed, 168 insertions, 3 deletions

diff --git a/arch/m68k/include/asm/processor.h b/arch/m68k/include/asm/processor.h
index fc3f2c22f2b8..74fd674b15ad 100644
--- a/arch/m68k/include/asm/processor.h
+++ b/arch/m68k/include/asm/processor.h
@@ -1,5 +1,170 @@
-#ifdef __uClinux__
-#include "processor_no.h"
+/*
+ * include/asm-m68k/processor.h
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#ifndef __ASM_M68K_PROCESSOR_H
+#define __ASM_M68K_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#include <linux/thread_info.h>
+#include <asm/segment.h>
+#include <asm/fpu.h>
+#include <asm/ptrace.h>
+
+static inline unsigned long rdusp(void)
+{
+#ifdef CONFIG_COLDFIRE
+        extern unsigned int sw_usp;
+        return sw_usp;
 #else
-#include "processor_mm.h"
+        unsigned long usp;
+        __asm__ __volatile__("move %/usp,%0" : "=a" (usp));
+        return usp;
+#endif
+}
+
+static inline void wrusp(unsigned long usp)
+{
+#ifdef CONFIG_COLDFIRE
+        extern unsigned int sw_usp;
+        sw_usp = usp;
+#else
+        __asm__ __volatile__("move %0,%/usp" : : "a" (usp));
+#endif
+}
+
+/*
+ * 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.
+ */
+#ifndef CONFIG_SUN3
+#define TASK_SIZE       (0xF0000000UL)
+#else
+#define TASK_SIZE       (0x0E000000UL)
+#endif
+
+#ifdef __KERNEL__
+#define STACK_TOP       TASK_SIZE
+#define STACK_TOP_MAX   STACK_TOP
+#endif
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#ifdef CONFIG_MMU
+#ifndef CONFIG_SUN3
+#define TASK_UNMAPPED_BASE      0xC0000000UL
+#else
+#define TASK_UNMAPPED_BASE      0x0A000000UL
+#endif
+#define TASK_UNMAPPED_ALIGN(addr, off)  PAGE_ALIGN(addr)
+#else
+#define TASK_UNMAPPED_BASE      0
+#endif
+
+struct thread_struct {
+        unsigned long  ksp;             /* kernel stack pointer */
+        unsigned long  usp;             /* user stack pointer */
+        unsigned short sr;              /* saved status register */
+        unsigned short fs;              /* saved fs (sfc, dfc) */
+        unsigned long  crp[2];          /* cpu root pointer */
+        unsigned long  esp0;            /* points to SR of stack frame */
+        unsigned long  faddr;           /* info about last fault */
+        int            signo, code;
+        unsigned long  fp[8*3];
+        unsigned long  fpcntl[3];       /* fp control regs */
+        unsigned char  fpstate[FPSTATESIZE];  /* floating point state */
+        struct thread_info info;
+};
+
+#define INIT_THREAD  {                                                  \
+        .ksp    = sizeof(init_stack) + (unsigned long) init_stack,      \
+        .sr     = PS_S,                                                 \
+        .fs     = __KERNEL_DS,                                          \
+        .info   = INIT_THREAD_INFO(init_task),                          \
+}
+
+#ifdef CONFIG_MMU
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+static inline void start_thread(struct pt_regs * regs, unsigned long pc,
+                                unsigned long usp)
+{
+        /* reads from user space */
+        set_fs(USER_DS);
+
+        regs->pc = pc;
+        regs->sr &= ~0x2000;
+        wrusp(usp);
+}
+
+#else
+
+/*
+ * Coldfire stacks need to be re-aligned on trap exit, conventional
+ * 68k can handle this case cleanly.
+ */
+#ifdef CONFIG_COLDFIRE
+#define reformat(_regs)         do { (_regs)->format = 0x4; } while(0)
+#else
+#define reformat(_regs)         do { } while (0)
+#endif
+
+#define start_thread(_regs, _pc, _usp)                  \
+do {                                                    \
+        set_fs(USER_DS); /* reads from user space */    \
+        (_regs)->pc = (_pc);                            \
+        ((struct switch_stack *)(_regs))[-1].a6 = 0;    \
+        reformat(_regs);                                \
+        if (current->mm)                                \
+                (_regs)->d5 = current->mm->start_data;  \
+        (_regs)->sr &= ~0x2000;                         \
+        wrusp(_usp);                                    \
+} while(0)
+
+#endif
+
+/* 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)
+{
+}
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)    do { } while (0)
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk)   \
+    ({                  \
+        unsigned long eip = 0;   \
+        if ((tsk)->thread.esp0 > PAGE_SIZE && \
+            (virt_addr_valid((tsk)->thread.esp0))) \
+              eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+        eip; })
+#define KSTK_ESP(tsk)   ((tsk) == current ? rdusp() : (tsk)->thread.usp)
+
+#define cpu_relax()     barrier()
+
 #endif