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/* SPDX-License-Identifier: GPL-2.0 */
// Copyright (C) 2005-2017 Andes Technology Corporation
#ifndef __ASM_NDS32_PROCESSOR_H
#define __ASM_NDS32_PROCESSOR_H
#ifdef __KERNEL__
#include <asm/ptrace.h>
#include <asm/types.h>
#include <asm/sigcontext.h>
#define KERNEL_STACK_SIZE PAGE_SIZE
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX TASK_SIZE
struct cpu_context {
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r9;
unsigned long r10;
unsigned long r11;
unsigned long r12;
unsigned long r13;
unsigned long r14;
unsigned long fp;
unsigned long pc;
unsigned long sp;
};
struct thread_struct {
struct cpu_context cpu_context; /* cpu context */
/* fault info */
unsigned long address;
unsigned long trap_no;
unsigned long error_code;
struct fpu_struct fpu;
};
#define INIT_THREAD { }
#ifdef __NDS32_EB__
#define PSW_DE PSW_mskBE
#else
#define PSW_DE 0x0
#endif
#ifdef CONFIG_WBNA
#define PSW_valWBNA PSW_mskWBNA
#else
#define PSW_valWBNA 0x0
#endif
#ifdef CONFIG_HWZOL
#define PSW_valINIT (PSW_CPL_ANY | PSW_mskAEN | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
#else
#define PSW_valINIT (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
#endif
#define start_thread(regs,pc,stack) \
({ \
memzero(regs, sizeof(struct pt_regs)); \
forget_syscall(regs); \
regs->ipsw = PSW_valINIT; \
regs->ir0 = (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_SYSTEM | PSW_INTL_1); \
regs->ipc = pc; \
regs->sp = stack; \
})
/* Forward declaration, a strange C thing */
struct task_struct;
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
#if IS_ENABLED(CONFIG_FPU)
#if !IS_ENABLED(CONFIG_UNLAZU_FPU)
extern struct task_struct *last_task_used_math;
#endif
#endif
/* Prepare to copy thread state - unlazy all lazy status */
#define prepare_to_copy(tsk) do { } while (0)
unsigned long get_wchan(struct task_struct *p);
#define cpu_relax() barrier()
#define task_pt_regs(task) \
((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
- 8) - 1)
/*
* Create a new kernel thread
*/
extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
#define KSTK_EIP(tsk) instruction_pointer(task_pt_regs(tsk))
#define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk))
#endif
#endif /* __ASM_NDS32_PROCESSOR_H */
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