1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (C) 2005-2017 Andes Technology Corporation
4 #ifndef __ASM_NDS32_PROCESSOR_H
5 #define __ASM_NDS32_PROCESSOR_H
9 #include <asm/ptrace.h>
10 #include <asm/types.h>
11 #include <asm/sigcontext.h>
13 #define KERNEL_STACK_SIZE PAGE_SIZE
14 #define STACK_TOP TASK_SIZE
15 #define STACK_TOP_MAX TASK_SIZE
32 struct thread_struct {
33 struct cpu_context cpu_context; /* cpu context */
35 unsigned long address;
36 unsigned long trap_no;
37 unsigned long error_code;
40 #define INIT_THREAD { }
43 #define PSW_DE PSW_mskBE
49 #define PSW_valWBNA PSW_mskWBNA
51 #define PSW_valWBNA 0x0
55 #define PSW_valINIT (PSW_CPL_ANY | PSW_mskAEN | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
57 #define PSW_valINIT (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE)
60 #define start_thread(regs,pc,stack) \
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); \
70 /* Forward declaration, a strange C thing */
73 /* Free all resources held by a thread. */
74 #define release_thread(thread) do { } while(0)
76 /* Prepare to copy thread state - unlazy all lazy status */
77 #define prepare_to_copy(tsk) do { } while (0)
79 unsigned long get_wchan(struct task_struct *p);
81 #define cpu_relax() barrier()
83 #define task_pt_regs(task) \
84 ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \
88 * Create a new kernel thread
90 extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
92 #define KSTK_EIP(tsk) instruction_pointer(task_pt_regs(tsk))
93 #define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk))
97 #endif /* __ASM_NDS32_PROCESSOR_H */