/* 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 */