LXR linux/arch/nds32/include/asm/processor.h

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (C) 2005-2017 Andes Technology Corporation
   3
   4#ifndef __ASM_NDS32_PROCESSOR_H
   5#define __ASM_NDS32_PROCESSOR_H
   6
   7#ifdef __KERNEL__
   8
   9#include <asm/ptrace.h>
  10#include <asm/types.h>
  11#include <asm/sigcontext.h>
  12
  13#define KERNEL_STACK_SIZE       PAGE_SIZE
  14#define STACK_TOP       TASK_SIZE
  15#define STACK_TOP_MAX   TASK_SIZE
  16
  17struct cpu_context {
  18        unsigned long r6;
  19        unsigned long r7;
  20        unsigned long r8;
  21        unsigned long r9;
  22        unsigned long r10;
  23        unsigned long r11;
  24        unsigned long r12;
  25        unsigned long r13;
  26        unsigned long r14;
  27        unsigned long fp;
  28        unsigned long pc;
  29        unsigned long sp;
  30};
  31
  32struct thread_struct {
  33        struct cpu_context cpu_context; /* cpu context */
  34        /* fault info     */
  35        unsigned long address;
  36        unsigned long trap_no;
  37        unsigned long error_code;
  38};
  39
  40#define INIT_THREAD  {  }
  41
  42#ifdef __NDS32_EB__
  43#define PSW_DE  PSW_mskBE
  44#else
  45#define PSW_DE  0x0
  46#endif
  47
  48#ifdef CONFIG_WBNA
  49#define PSW_valWBNA     PSW_mskWBNA
  50#else
  51#define PSW_valWBNA     0x0
  52#endif
  53
  54#ifdef CONFIG_HWZOL
  55#define PSW_valINIT (PSW_CPL_ANY | PSW_mskAEN | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
  56#else
  57#define PSW_valINIT (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
  58#endif
  59
  60#define start_thread(regs,pc,stack)                     \
  61({                                                      \
  62        memzero(regs, sizeof(struct pt_regs));          \
  63        forget_syscall(regs);                           \
  64        regs->ipsw = PSW_valINIT;                       \
  65        regs->ir0 = (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_SYSTEM | PSW_INTL_1);     \
  66        regs->ipc = pc;                                 \
  67        regs->sp = stack;                               \
  68})
  69
  70/* Forward declaration, a strange C thing */
  71struct task_struct;
  72
  73/* Free all resources held by a thread. */
  74#define release_thread(thread) do { } while(0)
  75
  76/* Prepare to copy thread state - unlazy all lazy status */
  77#define prepare_to_copy(tsk)    do { } while (0)
  78
  79unsigned long get_wchan(struct task_struct *p);
  80
  81#define cpu_relax()                     barrier()
  82
  83#define task_pt_regs(task) \
  84        ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
  85                - 8) - 1)
  86
  87/*
  88 * Create a new kernel thread
  89 */
  90extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
  91
  92#define KSTK_EIP(tsk)   instruction_pointer(task_pt_regs(tsk))
  93#define KSTK_ESP(tsk)   user_stack_pointer(task_pt_regs(tsk))
  94
  95#endif
  96
  97#endif /* __ASM_NDS32_PROCESSOR_H */
  98