LXR uboot/arch/avr32/include/asm/processor.h

   1/*
   2 * Copyright (C) 2006 Atmel Corporation
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6#ifndef __ASM_AVR32_PROCESSOR_H
   7#define __ASM_AVR32_PROCESSOR_H
   8
   9#ifndef __ASSEMBLY__
  10
  11#define current_text_addr() ({ void *pc; __asm__("mov %0,pc" : "=r"(pc)); pc; })
  12
  13struct avr32_cpuinfo {
  14        unsigned long loops_per_jiffy;
  15};
  16
  17extern struct avr32_cpuinfo boot_cpu_data;
  18
  19#ifdef CONFIG_SMP
  20extern struct avr32_cpuinfo cpu_data[];
  21#define current_cpu_data cpu_data[smp_processor_id()]
  22#else
  23#define cpu_data (&boot_cpu_data)
  24#define current_cpu_data boot_cpu_data
  25#endif
  26
  27/* TODO: Make configurable (2GB will serve as a reasonable default) */
  28#define TASK_SIZE       0x80000000
  29
  30/* This decides where the kernel will search for a free chunk of vm
  31 * space during mmap's
  32 */
  33#define TASK_UNMAPPED_BASE      (TASK_SIZE / 3)
  34
  35#define cpu_relax()             barrier()
  36#define cpu_sync_pipeline()     asm volatile("sub pc, -2" : : : "memory")
  37
  38/* This struct contains the CPU context as stored by switch_to() */
  39struct thread_struct {
  40        unsigned long pc;
  41        unsigned long ksp;      /* Kernel stack pointer */
  42        unsigned long r7;
  43        unsigned long r6;
  44        unsigned long r5;
  45        unsigned long r4;
  46        unsigned long r3;
  47        unsigned long r2;
  48        unsigned long r1;
  49        unsigned long r0;
  50};
  51
  52#define INIT_THREAD {                                           \
  53        .ksp = sizeof(init_stack) + (long)&init_stack,          \
  54}
  55
  56/*
  57 * Do necessary setup to start up a newly executed thread.
  58 */
  59#define start_thread(regs, new_pc, new_sp)       \
  60        set_fs(USER_DS);                         \
  61        regs->sr = 0;           /* User mode. */ \
  62        regs->gr[REG_PC] = new_pc;               \
  63        regs->gr[REG_SP] = new_sp
  64
  65struct task_struct;
  66
  67/* Free all resources held by a thread */
  68extern void release_thread(struct task_struct *);
  69
  70/* Create a kernel thread without removing it from tasklists */
  71extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
  72
  73/* Prepare to copy thread state - unlazy all lazy status */
  74#define prepare_to_copy(tsk) do { } while(0)
  75
  76/* Return saved PC of a blocked thread */
  77#define thread_saved_pc(tsk)    (tsk->thread.pc)
  78
  79#endif /* __ASSEMBLY__ */
  80
  81#endif /* __ASM_AVR32_PROCESSOR_H */
  82