| Greentime Hu | a15e9ff | 2017-10-24 15:47:50 +0800 | [diff] [blame] | 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 | /* |
| 8 | * Default implementation of macro that returns current |
| 9 | * instruction pointer ("program counter"). |
| 10 | */ |
| 11 | #define current_text_addr() ({ __label__ _l; _l: &&_l;}) |
| 12 | |
| 13 | #ifdef __KERNEL__ |
| 14 | |
| 15 | #include <asm/ptrace.h> |
| 16 | #include <asm/types.h> |
| 17 | #include <asm/sigcontext.h> |
| 18 | |
| 19 | #define KERNEL_STACK_SIZE PAGE_SIZE |
| 20 | #define STACK_TOP TASK_SIZE |
| 21 | #define STACK_TOP_MAX TASK_SIZE |
| 22 | |
| 23 | struct cpu_context { |
| 24 | unsigned long r6; |
| 25 | unsigned long r7; |
| 26 | unsigned long r8; |
| 27 | unsigned long r9; |
| 28 | unsigned long r10; |
| 29 | unsigned long r11; |
| 30 | unsigned long r12; |
| 31 | unsigned long r13; |
| 32 | unsigned long r14; |
| 33 | unsigned long fp; |
| 34 | unsigned long pc; |
| 35 | unsigned long sp; |
| 36 | }; |
| 37 | |
| 38 | struct thread_struct { |
| 39 | struct cpu_context cpu_context; /* cpu context */ |
| 40 | /* fault info */ |
| 41 | unsigned long address; |
| 42 | unsigned long trap_no; |
| 43 | unsigned long error_code; |
| 44 | }; |
| 45 | |
| 46 | #define INIT_THREAD { } |
| 47 | |
| 48 | #ifdef __NDS32_EB__ |
| 49 | #define PSW_DE PSW_mskBE |
| 50 | #else |
| 51 | #define PSW_DE 0x0 |
| 52 | #endif |
| 53 | |
| 54 | #ifdef CONFIG_WBNA |
| 55 | #define PSW_valWBNA PSW_mskWBNA |
| 56 | #else |
| 57 | #define PSW_valWBNA 0x0 |
| 58 | #endif |
| 59 | |
| 60 | #ifdef CONFIG_HWZOL |
| 61 | #define PSW_valINIT (PSW_CPL_ANY | PSW_mskAEN | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE) |
| 62 | #else |
| 63 | #define PSW_valINIT (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE) |
| 64 | #endif |
| 65 | |
| 66 | #define start_thread(regs,pc,stack) \ |
| 67 | ({ \ |
| 68 | memzero(regs, sizeof(struct pt_regs)); \ |
| 69 | forget_syscall(regs); \ |
| 70 | regs->ipsw = PSW_valINIT; \ |
| 71 | regs->ir0 = (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_SYSTEM | PSW_INTL_1); \ |
| 72 | regs->ipc = pc; \ |
| 73 | regs->sp = stack; \ |
| 74 | }) |
| 75 | |
| 76 | /* Forward declaration, a strange C thing */ |
| 77 | struct task_struct; |
| 78 | |
| 79 | /* Free all resources held by a thread. */ |
| 80 | #define release_thread(thread) do { } while(0) |
| 81 | |
| 82 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 83 | #define prepare_to_copy(tsk) do { } while (0) |
| 84 | |
| 85 | unsigned long get_wchan(struct task_struct *p); |
| 86 | |
| 87 | #define cpu_relax() barrier() |
| 88 | |
| 89 | #define task_pt_regs(task) \ |
| 90 | ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \ |
| 91 | - 8) - 1) |
| 92 | |
| 93 | /* |
| 94 | * Create a new kernel thread |
| 95 | */ |
| 96 | extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags); |
| 97 | |
| 98 | #define KSTK_EIP(tsk) instruction_pointer(task_pt_regs(tsk)) |
| 99 | #define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk)) |
| 100 | |
| 101 | #endif |
| 102 | |
| 103 | #endif /* __ASM_NDS32_PROCESSOR_H */ |