| Wolfgang Denk | 83c1585 | 2006-10-24 14:21:16 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 Atmel Corporation |
| 3 | * |
| 4 | * See file CREDITS for list of people who contributed to this |
| 5 | * project. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | */ |
| 22 | #ifndef __ASM_AVR32_PROCESSOR_H |
| 23 | #define __ASM_AVR32_PROCESSOR_H |
| 24 | |
| 25 | #ifndef __ASSEMBLY__ |
| 26 | |
| 27 | #define current_text_addr() ({ void *pc; __asm__("mov %0,pc" : "=r"(pc)); pc; }) |
| 28 | |
| 29 | struct avr32_cpuinfo { |
| 30 | unsigned long loops_per_jiffy; |
| 31 | }; |
| 32 | |
| 33 | extern struct avr32_cpuinfo boot_cpu_data; |
| 34 | |
| 35 | #ifdef CONFIG_SMP |
| 36 | extern struct avr32_cpuinfo cpu_data[]; |
| 37 | #define current_cpu_data cpu_data[smp_processor_id()] |
| 38 | #else |
| 39 | #define cpu_data (&boot_cpu_data) |
| 40 | #define current_cpu_data boot_cpu_data |
| 41 | #endif |
| 42 | |
| 43 | /* TODO: Make configurable (2GB will serve as a reasonable default) */ |
| 44 | #define TASK_SIZE 0x80000000 |
| 45 | |
| 46 | /* This decides where the kernel will search for a free chunk of vm |
| 47 | * space during mmap's |
| 48 | */ |
| 49 | #define TASK_UNMAPPED_BASE (TASK_SIZE / 3) |
| 50 | |
| 51 | #define cpu_relax() barrier() |
| 52 | #define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory") |
| 53 | |
| 54 | /* This struct contains the CPU context as stored by switch_to() */ |
| 55 | struct thread_struct { |
| 56 | unsigned long pc; |
| 57 | unsigned long ksp; /* Kernel stack pointer */ |
| 58 | unsigned long r7; |
| 59 | unsigned long r6; |
| 60 | unsigned long r5; |
| 61 | unsigned long r4; |
| 62 | unsigned long r3; |
| 63 | unsigned long r2; |
| 64 | unsigned long r1; |
| 65 | unsigned long r0; |
| 66 | }; |
| 67 | |
| 68 | #define INIT_THREAD { \ |
| 69 | .ksp = sizeof(init_stack) + (long)&init_stack, \ |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * Do necessary setup to start up a newly executed thread. |
| 74 | */ |
| 75 | #define start_thread(regs, new_pc, new_sp) \ |
| 76 | set_fs(USER_DS); \ |
| 77 | regs->sr = 0; /* User mode. */ \ |
| 78 | regs->gr[REG_PC] = new_pc; \ |
| 79 | regs->gr[REG_SP] = new_sp |
| 80 | |
| 81 | struct task_struct; |
| 82 | |
| 83 | /* Free all resources held by a thread */ |
| 84 | extern void release_thread(struct task_struct *); |
| 85 | |
| 86 | /* Create a kernel thread without removing it from tasklists */ |
| 87 | extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| 88 | |
| 89 | /* Prepare to copy thread state - unlazy all lazy status */ |
| 90 | #define prepare_to_copy(tsk) do { } while(0) |
| 91 | |
| 92 | /* Return saved PC of a blocked thread */ |
| 93 | #define thread_saved_pc(tsk) (tsk->thread.pc) |
| 94 | |
| 95 | #endif /* __ASSEMBLY__ */ |
| 96 | |
| 97 | #endif /* __ASM_AVR32_PROCESSOR_H */ |