1 /* SPDX-License-Identifier: GPL-2.0-only */ 1
2 /*
3 * Copyright (C) 2004, 2007-2010, 2011-2012 Sy
4 *
5 * vineetg: March 2009
6 * -Implemented task_pt_regs( )
7 *
8 * Amit Bhor, Sameer Dhavale, Ashwin Chaugule:
9 */
10
11 #ifndef __ASM_ARC_PROCESSOR_H
12 #define __ASM_ARC_PROCESSOR_H
13
14 #ifndef __ASSEMBLY__
15
16 #include <asm/ptrace.h>
17 #include <asm/dsp.h>
18 #include <asm/fpu.h>
19
20 /* Arch specific stuff which needs to be saved
21 * However these items are not so important so
22 * struct thread_info
23 */
24 struct thread_struct {
25 unsigned long ksp; /* kernel mode
26 unsigned long callee_reg; /* poi
27 unsigned long fault_address; /* dbl
28 #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS
29 struct dsp_callee_regs dsp;
30 #endif
31 #ifdef CONFIG_ARC_FPU_SAVE_RESTORE
32 struct arc_fpu fpu;
33 #endif
34 };
35
36 #define INIT_THREAD {
37 .ksp = sizeof(init_stack) + (unsigned
38 }
39
40 /* Forward declaration, a strange C thing */
41 struct task_struct;
42
43 #define task_pt_regs(p) \
44 ((struct pt_regs *)(THREAD_SIZE + (voi
45
46 /*
47 * A lot of busy-wait loops in SMP are based o
48 * get optimised away by gcc
49 */
50 #define cpu_relax() barrier()
51
52 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->re
53 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp
54
55 /*
56 * Where about of Task's sp, fp, blink when it
57 * Look in process.c for details of kernel sta
58 */
59 #define TSK_K_ESP(tsk) (tsk->thread.k
60
61 #define TSK_K_REG(tsk, off) (*((unsigned l
62 sizeof
63
64 #define TSK_K_BLINK(tsk) TSK_K_REG(tsk,
65 #define TSK_K_FP(tsk) TSK_K_REG(tsk,
66
67 extern void start_thread(struct pt_regs * regs
68 unsigned long usp);
69
70 extern unsigned int __get_wchan(struct task_st
71
72 #endif /* !__ASSEMBLY__ */
73
74 /*
75 * Default System Memory Map on ARC
76 *
77 * ---------------------------- (lower 2G, Tra
78 * 0x0000_0000 0x5FFF_FFFF (user
79 * 0x6000_0000 0x6FFF_FFFF (reser
80 * 0x7000_0000 0x7FFF_FFFF (kvadd
81 *
82 * PAGE_OFFSET ---------------- (Upper 2G, Unt
83 * 0x8000_0000 0xBFFF_FFFF (kerne
84 * 0xC000_0000 0xFFFF_FFFF (perip
85 * -------------------------------------------
86 */
87
88 #define TASK_SIZE 0x60000000
89
90 #define VMALLOC_START (PAGE_OFFSET - (CONFIG
91
92 /* 1 PGDIR_SIZE each for fixmap/pkmap, 2 PGDIR
93 #define VMALLOC_SIZE ((CONFIG_ARC_KVADDR_SI
94
95 #define VMALLOC_END (VMALLOC_START + VMALL
96
97 #define USER_KERNEL_GUTTER (VMALLOC_START -
98
99 #define STACK_TOP TASK_SIZE
100 #define STACK_TOP_MAX STACK_TOP
101
102 /* This decides where the kernel will search f
103 * space during mmap's.
104 */
105 #define TASK_UNMAPPED_BASE (TASK_SIZE / 3
106
107 #endif /* __ASM_ARC_PROCESSOR_H */
108
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