GuanXuetao | 79725df | 2011-01-15 18:15:01 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/unicore32/include/asm/processor.h |
| 3 | * |
| 4 | * Code specific to PKUnity SoC and UniCore ISA |
| 5 | * |
| 6 | * Copyright (C) 2001-2010 GUAN Xue-tao |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #ifndef __UNICORE_PROCESSOR_H__ |
| 14 | #define __UNICORE_PROCESSOR_H__ |
| 15 | |
| 16 | /* |
| 17 | * Default implementation of macro that returns current |
| 18 | * instruction pointer ("program counter"). |
| 19 | */ |
| 20 | #define current_text_addr() ({ __label__ _l; _l: &&_l; }) |
| 21 | |
| 22 | #ifdef __KERNEL__ |
| 23 | |
| 24 | #include <asm/ptrace.h> |
| 25 | #include <asm/types.h> |
| 26 | |
| 27 | #ifdef __KERNEL__ |
| 28 | #define STACK_TOP TASK_SIZE |
| 29 | #define STACK_TOP_MAX TASK_SIZE |
| 30 | #endif |
| 31 | |
| 32 | struct debug_entry { |
| 33 | u32 address; |
| 34 | u32 insn; |
| 35 | }; |
| 36 | |
| 37 | struct debug_info { |
| 38 | int nsaved; |
| 39 | struct debug_entry bp[2]; |
| 40 | }; |
| 41 | |
| 42 | struct thread_struct { |
| 43 | /* fault info */ |
| 44 | unsigned long address; |
| 45 | unsigned long trap_no; |
| 46 | unsigned long error_code; |
| 47 | /* debugging */ |
| 48 | struct debug_info debug; |
| 49 | }; |
| 50 | |
| 51 | #define INIT_THREAD { } |
| 52 | |
| 53 | #define start_thread(regs, pc, sp) \ |
| 54 | ({ \ |
| 55 | unsigned long *stack = (unsigned long *)sp; \ |
GuanXuetao | 79725df | 2011-01-15 18:15:01 +0800 | [diff] [blame] | 56 | memset(regs->uregs, 0, sizeof(regs->uregs)); \ |
| 57 | regs->UCreg_asr = USER_MODE; \ |
| 58 | regs->UCreg_pc = pc & ~1; /* pc */ \ |
| 59 | regs->UCreg_sp = sp; /* sp */ \ |
| 60 | regs->UCreg_02 = stack[2]; /* r2 (envp) */ \ |
| 61 | regs->UCreg_01 = stack[1]; /* r1 (argv) */ \ |
| 62 | regs->UCreg_00 = stack[0]; /* r0 (argc) */ \ |
| 63 | }) |
| 64 | |
| 65 | /* Forward declaration, a strange C thing */ |
| 66 | struct task_struct; |
| 67 | |
| 68 | /* Free all resources held by a thread. */ |
| 69 | extern void release_thread(struct task_struct *); |
| 70 | |
GuanXuetao | 79725df | 2011-01-15 18:15:01 +0800 | [diff] [blame] | 71 | unsigned long get_wchan(struct task_struct *p); |
| 72 | |
| 73 | #define cpu_relax() barrier() |
Davidlohr Bueso | 3a6bfbc | 2014-06-29 15:09:33 -0700 | [diff] [blame] | 74 | #define cpu_relax_lowlatency() cpu_relax() |
GuanXuetao | 79725df | 2011-01-15 18:15:01 +0800 | [diff] [blame] | 75 | |
GuanXuetao | 79725df | 2011-01-15 18:15:01 +0800 | [diff] [blame] | 76 | #define task_pt_regs(p) \ |
| 77 | ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) |
| 78 | |
| 79 | #define KSTK_EIP(tsk) (task_pt_regs(tsk)->UCreg_pc) |
| 80 | #define KSTK_ESP(tsk) (task_pt_regs(tsk)->UCreg_sp) |
| 81 | |
| 82 | #endif |
| 83 | |
| 84 | #endif /* __UNICORE_PROCESSOR_H__ */ |