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7b64fef3 WD |
1 | /* |
2 | * Copyright (C) 2006 Atmel Corporation | |
3 | * | |
1a459660 | 4 | * SPDX-License-Identifier: GPL-2.0+ |
7b64fef3 WD |
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 */ |