processor.h revision 9f9c0382cda2334b35b40b00f4ed9d6f89f37a7b
1867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 2867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Copyright 2010 Tilera Corporation. All Rights Reserved. 3867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * 4867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * This program is free software; you can redistribute it and/or 5867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * modify it under the terms of the GNU General Public License 6867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * as published by the Free Software Foundation, version 2. 7867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * 8867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * This program is distributed in the hope that it will be useful, but 9867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * WITHOUT ANY WARRANTY; without even the implied warranty of 10867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * NON INFRINGEMENT. See the GNU General Public License for 12867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * more details. 13867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 14867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 15867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifndef _ASM_TILE_PROCESSOR_H 16867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define _ASM_TILE_PROCESSOR_H 17867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 18867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifndef __ASSEMBLY__ 19867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 20867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 21867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * NOTE: we don't include <linux/ptrace.h> or <linux/percpu.h> as one 22867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * normally would, due to #include dependencies. 23867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 249f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf#include <linux/types.h> 25867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#include <asm/ptrace.h> 26867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#include <asm/percpu.h> 27867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 28867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#include <arch/chip.h> 29867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#include <arch/spr_def.h> 30867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 31867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct task_struct; 32867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct thread_struct; 33867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 34867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalftypedef struct { 35867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long seg; 36867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf} mm_segment_t; 37867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 38867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 39867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Default implementation of macro that returns current 40867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * instruction pointer ("program counter"). 41867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 42867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfvoid *current_text_addr(void); 43867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 44867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_TILE_DMA() 45867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Capture the state of a suspended DMA. */ 46867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct tile_dma_state { 47867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf int enabled; 48867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long src; 49867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long dest; 50867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long strides; 51867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long chunk_size; 52867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long src_chunk; 53867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long dest_chunk; 54867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long byte; 55867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long status; 56867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf}; 57867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 58867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 59867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * A mask of the DMA status register for selecting only the 'running' 60867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * and 'done' bits. 61867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 62867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define DMA_STATUS_MASK \ 63867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf (SPR_DMA_STATUS__RUNNING_MASK | SPR_DMA_STATUS__DONE_MASK) 64867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 65867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 66867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 67867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Track asynchronous TLB events (faults and access violations) 68867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * that occur while we are in kernel mode from DMA or the SN processor. 69867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 70867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct async_tlb { 71867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf short fault_num; /* original fault number; 0 if none */ 72867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf char is_fault; /* was it a fault (vs an access violation) */ 73867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf char is_write; /* for fault: was it caused by a write? */ 74867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long address; /* what address faulted? */ 75867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf}; 76867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 779f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf#ifdef CONFIG_HARDWALL 789f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalfstruct hardwall_info; 799f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf#endif 80867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 81867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct thread_struct { 82867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* kernel stack pointer */ 83867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long ksp; 84867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* kernel PC */ 85867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long pc; 86867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* starting user stack pointer (for page migration) */ 87867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long usp0; 88867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* pid of process that created this one */ 89867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf pid_t creator_pid; 90867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_TILE_DMA() 91867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* DMA info for suspended threads (byte == 0 means no DMA state) */ 92867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf struct tile_dma_state tile_dma_state; 93867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 94867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* User EX_CONTEXT registers */ 95867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long ex_context[2]; 96867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* User SYSTEM_SAVE registers */ 97867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long system_save[4]; 98867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* User interrupt mask */ 99867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long long interrupt_mask; 100867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* User interrupt-control 0 state */ 101867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long intctrl_0; 102867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_PROC_STATUS_SPR() 103867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* Any other miscellaneous processor state bits */ 104867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long proc_status; 105867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 1069f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf#ifdef CONFIG_HARDWALL 1079f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf /* Is this task tied to an activated hardwall? */ 1089f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf struct hardwall_info *hardwall; 1099f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf /* Chains this task into the list at hardwall->list. */ 1109f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf struct list_head hardwall_list; 1119f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf#endif 112867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_TILE_DMA() 113867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* Async DMA TLB fault information */ 114867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf struct async_tlb dma_async_tlb; 115867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 116867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_SN_PROC() 117867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* Was static network processor when we were switched out? */ 118867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf int sn_proc_running; 119867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* Async SNI TLB fault information */ 120867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf struct async_tlb sn_async_tlb; 121867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 122867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf}; 123867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 124867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif /* !__ASSEMBLY__ */ 125867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 126867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 127867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Start with "sp" this many bytes below the top of the kernel stack. 128867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * This preserves the invariant that a called function may write to *sp. 129867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 130867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define STACK_TOP_DELTA 8 131867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 132867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 133867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * When entering the kernel via a fault, start with the top of the 134867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * pt_regs structure this many bytes below the top of the page. 135867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * This aligns the pt_regs structure optimally for cache-line access. 136867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 137867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifdef __tilegx__ 138867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KSTK_PTREGS_GAP 48 139867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 140867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KSTK_PTREGS_GAP 56 141867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 142867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 143867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifndef __ASSEMBLY__ 144867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 145867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifdef __tilegx__ 146867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define TASK_SIZE_MAX (MEM_LOW_END + 1) 147867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 148867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define TASK_SIZE_MAX PAGE_OFFSET 149867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 150867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 151867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* TASK_SIZE and related variables are always checked in "current" context. */ 152867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifdef CONFIG_COMPAT 153867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define COMPAT_TASK_SIZE (1UL << 31) 154867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define TASK_SIZE ((current_thread_info()->status & TS_COMPAT) ?\ 155867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf COMPAT_TASK_SIZE : TASK_SIZE_MAX) 156867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 157867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define TASK_SIZE TASK_SIZE_MAX 158867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 159867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 160867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* We provide a minimal "vdso" a la x86; just the sigreturn code for now. */ 161867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define VDSO_BASE (TASK_SIZE - PAGE_SIZE) 162867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 163867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define STACK_TOP VDSO_BASE 164867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 165867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* STACK_TOP_MAX is used temporarily in execve and should not check COMPAT. */ 166867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define STACK_TOP_MAX TASK_SIZE_MAX 167867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 168867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 169867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * This decides where the kernel will search for a free chunk of vm 170867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * space during mmap's, if it is using bottom-up mapping. 171867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 172867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) 173867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 174867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define HAVE_ARCH_PICK_MMAP_LAYOUT 175867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 176867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define INIT_THREAD { \ 177867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf .ksp = (unsigned long)init_stack + THREAD_SIZE - STACK_TOP_DELTA, \ 178867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf .interrupt_mask = -1ULL \ 179867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf} 180867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 181867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Kernel stack top for the task that first boots on this cpu. */ 182867e359b97c970a60626d5d76bbe2a8fadbf38fbChris MetcalfDECLARE_PER_CPU(unsigned long, boot_sp); 183867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 184867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* PC to boot from on this cpu. */ 185867e359b97c970a60626d5d76bbe2a8fadbf38fbChris MetcalfDECLARE_PER_CPU(unsigned long, boot_pc); 186867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 187867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Do necessary setup to start up a newly executed thread. */ 188867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstatic inline void start_thread(struct pt_regs *regs, 189867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long pc, unsigned long usp) 190867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf{ 191867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf regs->pc = pc; 192867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf regs->sp = usp; 193867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf} 194867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 195867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Free all resources held by a thread. */ 196867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstatic inline void release_thread(struct task_struct *dead_task) 197867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf{ 198867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf /* Nothing for now */ 199867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf} 200867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 201867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Prepare to copy thread state - unlazy all lazy status. */ 202867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define prepare_to_copy(tsk) do { } while (0) 203867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 204867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); 205867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 206867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 207867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 208867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Return saved (kernel) PC of a blocked thread. 209867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Only used in a printk() in kernel/sched.c, so don't work too hard. 210867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 211867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define thread_saved_pc(t) ((t)->thread.pc) 212867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 213867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfunsigned long get_wchan(struct task_struct *p); 214867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 215867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Return initial ksp value for given task. */ 216867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define task_ksp0(task) ((unsigned long)(task)->stack + THREAD_SIZE) 217867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 218867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Return some info about the user process TASK. */ 219867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KSTK_TOP(task) (task_ksp0(task) - STACK_TOP_DELTA) 220867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define task_pt_regs(task) \ 221867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf ((struct pt_regs *)(task_ksp0(task) - KSTK_PTREGS_GAP) - 1) 222867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define task_sp(task) (task_pt_regs(task)->sp) 223867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define task_pc(task) (task_pt_regs(task)->pc) 224867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Aliases for pc and sp (used in fs/proc/array.c) */ 225867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KSTK_EIP(task) task_pc(task) 226867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KSTK_ESP(task) task_sp(task) 227867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 228867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Standard format for printing registers and other word-size data. */ 229867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifdef __tilegx__ 230867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf# define REGFMT "0x%016lx" 231867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 232867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf# define REGFMT "0x%08lx" 233867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 234867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 235867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 236867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Do some slow action (e.g. read a slow SPR). 237867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Note that this must also have compiler-barrier semantics since 238867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * it may be used in a busy loop reading memory. 239867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 240867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstatic inline void cpu_relax(void) 241867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf{ 242867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf __insn_mfspr(SPR_PASS); 243867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf barrier(); 244867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf} 245867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 246867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfstruct siginfo; 247867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern void arch_coredump_signal(struct siginfo *, struct pt_regs *); 248867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define arch_coredump_signal arch_coredump_signal 249867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 2509f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf/* Info on this processor (see fs/proc/cpuinfo.c) */ 2519f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalfstruct seq_operations; 2529f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalfextern const struct seq_operations cpuinfo_op; 2539f9c0382cda2334b35b40b00f4ed9d6f89f37a7bChris Metcalf 254867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Provide information about the chip model. */ 255867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern char chip_model[64]; 256867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 257867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Data on which physical memory controller corresponds to which NUMA node. */ 258867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int node_controller[]; 259867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 260867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 261867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Do we dump information to the console when a user application crashes? */ 262867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int show_crashinfo; 263867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 264867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CHIP_HAS_CBOX_HOME_MAP() 265867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Does the heap allocator return hash-for-home pages by default? */ 266867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int hash_default; 267867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 268867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Should kernel stack pages be hash-for-home? */ 269867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int kstack_hash; 270867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 271867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define hash_default 0 272867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define kstack_hash 0 273867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 274867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 275867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Are we using huge pages in the TLB for kernel data? */ 276867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalfextern int kdata_huge; 277867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 278867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 279867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Note that with OLOC the prefetch will return an unused read word to 280867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * the issuing tile, which will cause some MDN traffic. Benchmarking 281867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * should be done to see whether this outweighs prefetching. 282867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 283867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define ARCH_HAS_PREFETCH 284867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define ARCH_HAS_PREFETCHW 285867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define ARCH_HAS_SPINLOCK_PREFETCH 286867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 287867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define prefetch(ptr) __builtin_prefetch((ptr), 0, 3) 288867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define prefetchw(ptr) __builtin_prefetch((ptr), 1, 3) 289867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 290867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#ifdef CONFIG_SMP 291867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define spin_lock_prefetch(ptr) prefetchw(ptr) 292867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else 293867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Nothing to prefetch. */ 294867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define spin_lock_prefetch(lock) do { } while (0) 295867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 296867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 297867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#else /* __ASSEMBLY__ */ 298867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 299867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Do some slow action (e.g. read a slow SPR). */ 300867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define CPU_RELAX mfspr zero, SPR_PASS 301867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 302867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif /* !__ASSEMBLY__ */ 303867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 304867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Assembly code assumes that the PL is in the low bits. */ 305867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if SPR_EX_CONTEXT_1_1__PL_SHIFT != 0 306867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf# error Fix assembly assumptions about PL 307867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 308867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 309867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* We sometimes use these macros for EX_CONTEXT_0_1 as well. */ 310867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if SPR_EX_CONTEXT_1_1__PL_SHIFT != SPR_EX_CONTEXT_0_1__PL_SHIFT || \ 311867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf SPR_EX_CONTEXT_1_1__PL_RMASK != SPR_EX_CONTEXT_0_1__PL_RMASK || \ 312867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf SPR_EX_CONTEXT_1_1__ICS_SHIFT != SPR_EX_CONTEXT_0_1__ICS_SHIFT || \ 313867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf SPR_EX_CONTEXT_1_1__ICS_RMASK != SPR_EX_CONTEXT_0_1__ICS_RMASK 314867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf# error Fix assumptions that EX1 macros work for both PL0 and PL1 315867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 316867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 317867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* Allow pulling apart and recombining the PL and ICS bits in EX_CONTEXT. */ 318867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define EX1_PL(ex1) \ 319867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf (((ex1) >> SPR_EX_CONTEXT_1_1__PL_SHIFT) & SPR_EX_CONTEXT_1_1__PL_RMASK) 320867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define EX1_ICS(ex1) \ 321867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf (((ex1) >> SPR_EX_CONTEXT_1_1__ICS_SHIFT) & SPR_EX_CONTEXT_1_1__ICS_RMASK) 322867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define PL_ICS_EX1(pl, ics) \ 323867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf (((pl) << SPR_EX_CONTEXT_1_1__PL_SHIFT) | \ 324867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf ((ics) << SPR_EX_CONTEXT_1_1__ICS_SHIFT)) 325867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 326867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* 327867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Provide symbolic constants for PLs. 328867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf * Note that assembly code assumes that USER_PL is zero. 329867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf */ 330867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define USER_PL 0 331867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define KERNEL_PL 1 332867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 333867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf/* SYSTEM_SAVE_1_0 holds the current cpu number ORed with ksp0. */ 334867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define CPU_LOG_MASK_VALUE 12 335867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define CPU_MASK_VALUE ((1 << CPU_LOG_MASK_VALUE) - 1) 336867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#if CONFIG_NR_CPUS > CPU_MASK_VALUE 337867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf# error Too many cpus! 338867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif 339867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define raw_smp_processor_id() \ 340867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf ((int)__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & CPU_MASK_VALUE) 341867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define get_current_ksp0() \ 342867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf (__insn_mfspr(SPR_SYSTEM_SAVE_1_0) & ~CPU_MASK_VALUE) 343867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#define next_current_ksp0(task) ({ \ 344867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf unsigned long __ksp0 = task_ksp0(task); \ 345867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf int __cpu = raw_smp_processor_id(); \ 346867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf BUG_ON(__ksp0 & CPU_MASK_VALUE); \ 347867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf __ksp0 | __cpu; \ 348867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf}) 349867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf 350867e359b97c970a60626d5d76bbe2a8fadbf38fbChris Metcalf#endif /* _ASM_TILE_PROCESSOR_H */ 351