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