| Wolfgang Denk | 83c1585 | 2006-10-24 14:21:16 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 Atmel Corporation |
| 3 | * |
| Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 4 | * SPDX-License-Identifier: GPL-2.0+ |
| Wolfgang Denk | 83c1585 | 2006-10-24 14:21:16 +0200 | [diff] [blame] | 5 | */ |
| 6 | #ifndef __ASM_AVR32_PROCESSOR_H |
| 7 | #define __ASM_AVR32_PROCESSOR_H |
| 8 | |
| 9 | #ifndef __ASSEMBLY__ |
| 10 | |
| 11 | #define current_text_addr() ({ void *pc; __asm__("mov %0,pc" : "=r"(pc)); pc; }) |
| 12 | |
| 13 | struct avr32_cpuinfo { |
| 14 | unsigned long loops_per_jiffy; |
| 15 | }; |
| 16 | |
| 17 | extern struct avr32_cpuinfo boot_cpu_data; |
| 18 | |
| 19 | #ifdef CONFIG_SMP |
| 20 | extern struct avr32_cpuinfo cpu_data[]; |
| 21 | #define current_cpu_data cpu_data[smp_processor_id()] |
| 22 | #else |
| 23 | #define cpu_data (&boot_cpu_data) |
| 24 | #define current_cpu_data boot_cpu_data |
| 25 | #endif |
| 26 | |
| 27 | /* TODO: Make configurable (2GB will serve as a reasonable default) */ |
| 28 | #define TASK_SIZE 0x80000000 |
| 29 | |
| 30 | /* This decides where the kernel will search for a free chunk of vm |
| 31 | * space during mmap's |
| 32 | */ |
| 33 | #define TASK_UNMAPPED_BASE (TASK_SIZE / 3) |
| 34 | |
| 35 | #define cpu_relax() barrier() |
| 36 | #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") |
| 37 | |
| 38 | /* This struct contains the CPU context as stored by switch_to() */ |
| 39 | struct thread_struct { |
| 40 | unsigned long pc; |
| 41 | unsigned long ksp; /* Kernel stack pointer */ |
| 42 | unsigned long r7; |
| 43 | unsigned long r6; |
| 44 | unsigned long r5; |
| 45 | unsigned long r4; |
| 46 | unsigned long r3; |
| 47 | unsigned long r2; |
| 48 | unsigned long r1; |
| 49 | unsigned long r0; |
| 50 | }; |
| 51 | |
| 52 | #define INIT_THREAD { \ |
| 53 | .ksp = sizeof(init_stack) + (long)&init_stack, \ |
| 54 | } |
| 55 | |
| 56 | /* |
| 57 | * Do necessary setup to start up a newly executed thread. |
| 58 | */ |
| 59 | #define start_thread(regs, new_pc, new_sp) \ |
| 60 | set_fs(USER_DS); \ |
| 61 | regs->sr = 0; /* User mode. */ \ |
| 62 | regs->gr[REG_PC] = new_pc; \ |
| 63 | regs->gr[REG_SP] = new_sp |
| 64 | |
| 65 | struct task_struct; |
| 66 | |
| 67 | /* Free all resources held by a thread */ |
| 68 | extern void release_thread(struct task_struct *); |
| 69 | |
| 70 | /* Create a kernel thread without removing it from tasklists */ |
| 71 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 72 | |
| 73 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 74 | #define prepare_to_copy(tsk) do { } while(0) |
| 75 | |
| 76 | /* Return saved PC of a blocked thread */ |
| 77 | #define thread_saved_pc(tsk) (tsk->thread.pc) |
| 78 | |
| 79 | #endif /* __ASSEMBLY__ */ |
| 80 | |
| 81 | #endif /* __ASM_AVR32_PROCESSOR_H */ |