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@@ -1,5 +1,170 @@
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-#ifdef __uClinux__
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-#include "processor_no.h"
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+/*
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+ * include/asm-m68k/processor.h
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+ *
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+ * Copyright (C) 1995 Hamish Macdonald
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+ */
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+
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+#ifndef __ASM_M68K_PROCESSOR_H
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+#define __ASM_M68K_PROCESSOR_H
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+
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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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+
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+#include <linux/thread_info.h>
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+#include <asm/segment.h>
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+#include <asm/fpu.h>
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+#include <asm/ptrace.h>
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+
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+static inline unsigned long rdusp(void)
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+{
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+#ifdef CONFIG_COLDFIRE
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+ extern unsigned int sw_usp;
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+ return sw_usp;
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#else
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-#include "processor_mm.h"
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+ unsigned long usp;
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+ __asm__ __volatile__("move %/usp,%0" : "=a" (usp));
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+ return usp;
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+#endif
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+}
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+
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+static inline void wrusp(unsigned long usp)
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+{
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+#ifdef CONFIG_COLDFIRE
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+ extern unsigned int sw_usp;
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+ sw_usp = usp;
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+#else
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+ __asm__ __volatile__("move %0,%/usp" : : "a" (usp));
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+#endif
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+}
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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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+#ifndef CONFIG_SUN3
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+#define TASK_SIZE (0xF0000000UL)
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+#else
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+#define TASK_SIZE (0x0E000000UL)
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+#endif
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+
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+#ifdef __KERNEL__
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+#define STACK_TOP TASK_SIZE
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+#define STACK_TOP_MAX STACK_TOP
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+#endif
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+
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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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+#ifdef CONFIG_MMU
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+#ifndef CONFIG_SUN3
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+#define TASK_UNMAPPED_BASE 0xC0000000UL
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+#else
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+#define TASK_UNMAPPED_BASE 0x0A000000UL
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+#endif
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+#define TASK_UNMAPPED_ALIGN(addr, off) PAGE_ALIGN(addr)
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+#else
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+#define TASK_UNMAPPED_BASE 0
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+#endif
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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 sr; /* saved status register */
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+ unsigned short fs; /* saved fs (sfc, dfc) */
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+ unsigned long crp[2]; /* cpu root pointer */
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+ unsigned long esp0; /* points to SR of stack frame */
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+ unsigned long faddr; /* info about last fault */
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+ int signo, code;
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+ unsigned long fp[8*3];
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+ unsigned long fpcntl[3]; /* fp control regs */
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+ unsigned char fpstate[FPSTATESIZE]; /* floating point state */
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+ struct thread_info info;
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+};
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+
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+#define INIT_THREAD { \
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+ .ksp = sizeof(init_stack) + (unsigned long) init_stack, \
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+ .sr = PS_S, \
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+ .fs = __KERNEL_DS, \
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+ .info = INIT_THREAD_INFO(init_task), \
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+}
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+
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+#ifdef CONFIG_MMU
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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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+static inline void start_thread(struct pt_regs * regs, unsigned long pc,
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+ unsigned long usp)
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+{
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+ /* reads from user space */
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+ set_fs(USER_DS);
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+
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+ regs->pc = pc;
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+ regs->sr &= ~0x2000;
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+ wrusp(usp);
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+}
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+
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+#else
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+
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+/*
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+ * Coldfire stacks need to be re-aligned on trap exit, conventional
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+ * 68k can handle this case cleanly.
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+ */
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+#ifdef CONFIG_COLDFIRE
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+#define reformat(_regs) do { (_regs)->format = 0x4; } while(0)
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+#else
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+#define reformat(_regs) do { } while (0)
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+#endif
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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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+ ((struct switch_stack *)(_regs))[-1].a6 = 0; \
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+ reformat(_regs); \
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+ if (current->mm) \
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+ (_regs)->d5 = current->mm->start_data; \
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+ (_regs)->sr &= ~0x2000; \
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+ wrusp(_usp); \
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+} while(0)
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+
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+#endif
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+
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+/* Forward declaration, a strange C thing */
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+struct task_struct;
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+
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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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+
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+/* Prepare to copy thread state - unlazy all lazy status */
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+#define prepare_to_copy(tsk) do { } while (0)
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+
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+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
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+
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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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+extern unsigned long thread_saved_pc(struct task_struct *tsk);
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+
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+unsigned long get_wchan(struct task_struct *p);
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+
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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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+ (virt_addr_valid((tsk)->thread.esp0))) \
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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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+
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+#define cpu_relax() barrier()
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+
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#endif
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Greg Ungerer