tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
ARC: Fundamental ARCH data-types/defines
* L1_CACHE_SHIFT
* PAGE_SIZE, PAGE_OFFSET
* struct pt_regs, struct user_regs_struct
* struct thread_struct, cpu_relax(), task_pt_regs(), start_thread(), ...
* struct thread_info, THREAD_SIZE, INIT_THREAD_INFO(), TIF_*, ...
* BUG()
* ELF_*
* Elf_*
To disallow user-space visibility into some of the core kernel data-types
such as struct pt_regs, #ifdef __KERNEL__ which also makes the UAPI header
spit (further patch in the series) to NOT export it to asm/uapi/ptrace.h
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Jonas Bonn <jonas.bonn@gmail.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Arnd Bergmann <arnd@arndb.de>
+685
+37
arch/arc/include/asm/bug.h
+37
arch/arc/include/asm/bug.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef _ASM_ARC_BUG_H
10
+
#define _ASM_ARC_BUG_H
11
+
12
+
#ifndef __ASSEMBLY__
13
+
14
+
#include <asm/ptrace.h>
15
+
16
+
struct task_struct;
17
+
18
+
void show_regs(struct pt_regs *regs);
19
+
void show_stacktrace(struct task_struct *tsk, struct pt_regs *regs);
20
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void show_kernel_fault_diag(const char *str, struct pt_regs *regs,
21
+
unsigned long address, unsigned long cause_reg);
22
+
void die(const char *str, struct pt_regs *regs, unsigned long address,
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+
unsigned long cause_reg);
24
+
25
+
#define BUG() do { \
26
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dump_stack(); \
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pr_warn("Kernel BUG in %s: %s: %d!\n", \
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+
__FILE__, __func__, __LINE__); \
29
+
} while (0)
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+
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#define HAVE_ARCH_BUG
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+
33
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#include <asm-generic/bug.h>
34
+
35
+
#endif /* !__ASSEMBLY__ */
36
+
37
+
#endif
+21
arch/arc/include/asm/cache.h
+21
arch/arc/include/asm/cache.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
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*
4
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* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef __ARC_ASM_CACHE_H
10
+
#define __ARC_ASM_CACHE_H
11
+
12
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/* In case $$ not config, setup a dummy number for rest of kernel */
13
+
#ifndef CONFIG_ARC_CACHE_LINE_SHIFT
14
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#define L1_CACHE_SHIFT 6
15
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#else
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#define L1_CACHE_SHIFT CONFIG_ARC_CACHE_LINE_SHIFT
17
+
#endif
18
+
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#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
20
+
21
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#endif /* _ASM_CACHE_H */
+97
arch/arc/include/asm/elf.h
+97
arch/arc/include/asm/elf.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef __ASM_ARC_ELF_H
10
+
#define __ASM_ARC_ELF_H
11
+
12
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#include <asm/ptrace.h>
13
+
14
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#define EM_ARCOMPACT 93
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+
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/* Machine specific ELF Hdr flags */
17
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#define EF_ARC_OSABI_MSK 0x00000f00
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#define EF_ARC_OSABI_ORIG 0x00000000 /* MUST be zero for back-compat */
19
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#define EF_ARC_OSABI_V2 0x00000200
20
+
21
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/* ARC Relocations (kernel Modules only) */
22
+
#define R_ARC_32 0x4
23
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#define R_ARC_32_ME 0x1B
24
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#define R_ARC_S25H_PCREL 0x10
25
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#define R_ARC_S25W_PCREL 0x11
26
+
27
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typedef unsigned long elf_greg_t;
28
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typedef unsigned long elf_fpregset_t;
29
+
30
+
31
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/* core dump regs is in the order pt_regs, callee_regs, stop_pc (for gdb) */
32
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#define ELF_NGREG ((sizeof(struct pt_regs) + sizeof(struct callee_regs) \
33
+
+ sizeof(unsigned long)) / sizeof(elf_greg_t))
34
+
35
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
36
+
37
+
/*
38
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* To ensure that
39
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* -we don't load something for the wrong architecture.
40
+
* -The userspace is using the correct syscall ABI
41
+
*/
42
+
struct elf32_hdr;
43
+
extern int elf_check_arch(const struct elf32_hdr *);
44
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#define elf_check_arch elf_check_arch
45
+
46
+
/*
47
+
* These are used to set parameters in the core dumps.
48
+
*/
49
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#define ELF_ARCH EM_ARCOMPACT
50
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#define ELF_CLASS ELFCLASS32
51
+
52
+
#ifdef CONFIG_CPU_BIG_ENDIAN
53
+
#define ELF_DATA ELFDATA2MSB
54
+
#else
55
+
#define ELF_DATA ELFDATA2LSB
56
+
#endif
57
+
58
+
#ifdef __KERNEL__
59
+
60
+
#define CORE_DUMP_USE_REGSET
61
+
62
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
63
+
64
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/*
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* This is the location that an ET_DYN program is loaded if exec'ed. Typical
66
+
* use of this is to invoke "./ld.so someprog" to test out a new version of
67
+
* the loader. We need to make sure that it is out of the way of the program
68
+
* that it will "exec", and that there is sufficient room for the brk.
69
+
*/
70
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#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
71
+
72
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/*
73
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* When the program starts, a1 contains a pointer to a function to be
74
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* registered with atexit, as per the SVR4 ABI. A value of 0 means we
75
+
* have no such handler.
76
+
*/
77
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#define ELF_PLAT_INIT(_r, load_addr) ((_r)->r0 = 0)
78
+
79
+
/*
80
+
* This yields a mask that user programs can use to figure out what
81
+
* instruction set this cpu supports.
82
+
*/
83
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#define ELF_HWCAP (0)
84
+
85
+
/*
86
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* This yields a string that ld.so will use to load implementation
87
+
* specific libraries for optimization. This is more specific in
88
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* intent than poking at uname or /proc/cpuinfo.
89
+
*/
90
+
#define ELF_PLATFORM (NULL)
91
+
92
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#define SET_PERSONALITY(ex) \
93
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set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
94
+
95
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#endif /* __KERNEL__ */
96
+
97
+
#endif
+15
arch/arc/include/asm/exec.h
+15
arch/arc/include/asm/exec.h
···
1
+
/*
2
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
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#ifndef __ASM_ARC_EXEC_H
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#define __ASM_ARC_EXEC_H
11
+
12
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/* Align to 16b */
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#define arch_align_stack(p) ((unsigned long)(p) & ~0xf)
14
+
15
+
#endif
+19
arch/arc/include/asm/kdebug.h
+19
arch/arc/include/asm/kdebug.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef _ASM_ARC_KDEBUG_H
10
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#define _ASM_ARC_KDEBUG_H
11
+
12
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enum die_val {
13
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DIE_UNUSED,
14
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DIE_TRAP,
15
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DIE_IERR,
16
+
DIE_OOPS
17
+
};
18
+
19
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#endif
+30
arch/arc/include/asm/linkage.h
+30
arch/arc/include/asm/linkage.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef __ASM_LINKAGE_H
10
+
#define __ASM_LINKAGE_H
11
+
12
+
#ifdef __ASSEMBLY__
13
+
14
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/* Can't use the ENTRY macro in linux/linkage.h
15
+
* gas considers ';' as comment vs. newline
16
+
*/
17
+
.macro ARC_ENTRY name
18
+
.global \name
19
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.align 4
20
+
\name:
21
+
.endm
22
+
23
+
.macro ARC_EXIT name
24
+
#define ASM_PREV_SYM_ADDR(name) .-##name
25
+
.size \ name, ASM_PREV_SYM_ADDR(\name)
26
+
.endm
27
+
28
+
#endif /* __ASSEMBLY__ */
29
+
30
+
#endif
+17
arch/arc/include/asm/module.h
+17
arch/arc/include/asm/module.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*
8
+
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
9
+
10
+
*/
11
+
12
+
#ifndef _ASM_ARC_MODULE_H
13
+
#define _ASM_ARC_MODULE_H
14
+
15
+
#include <asm-generic/module.h>
16
+
17
+
#endif /* _ASM_ARC_MODULE_H */
+42
arch/arc/include/asm/page.h
+42
arch/arc/include/asm/page.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef __ASM_ARC_PAGE_H
10
+
#define __ASM_ARC_PAGE_H
11
+
12
+
/* PAGE_SHIFT determines the page size */
13
+
#if defined(CONFIG_ARC_PAGE_SIZE_16K)
14
+
#define PAGE_SHIFT 14
15
+
#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
16
+
#define PAGE_SHIFT 12
17
+
#else
18
+
/*
19
+
* Default 8k
20
+
* done this way (instead of under CONFIG_ARC_PAGE_SIZE_8K) because adhoc
21
+
* user code (busybox appletlib.h) expects PAGE_SHIFT to be defined w/o
22
+
* using the correct uClibc header and in their build our autoconf.h is
23
+
* not available
24
+
*/
25
+
#define PAGE_SHIFT 13
26
+
#endif
27
+
28
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#ifdef __ASSEMBLY__
29
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#define PAGE_SIZE (1 << PAGE_SHIFT)
30
+
#define PAGE_OFFSET (0x80000000)
31
+
#else
32
+
#define PAGE_SIZE (1UL << PAGE_SHIFT) /* Default 8K */
33
+
#define PAGE_OFFSET (0x80000000UL) /* Kernel starts at 2G onwards */
34
+
#endif
35
+
36
+
#define PAGE_MASK (~(PAGE_SIZE-1))
37
+
38
+
#endif /* !__ASSEMBLY__ */
39
+
40
+
#endif /* __KERNEL__ */
41
+
42
+
#endif
+143
arch/arc/include/asm/processor.h
+143
arch/arc/include/asm/processor.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*
8
+
* vineetg: March 2009
9
+
* -Implemented task_pt_regs( )
10
+
*
11
+
* Amit Bhor, Sameer Dhavale, Ashwin Chaugule: Codito Technologies 2004
12
+
*/
13
+
14
+
#ifndef __ASM_ARC_PROCESSOR_H
15
+
#define __ASM_ARC_PROCESSOR_H
16
+
17
+
#ifdef __KERNEL__
18
+
19
+
#ifndef __ASSEMBLY__
20
+
21
+
#include <asm/arcregs.h> /* for STATUS_E1_MASK et all */
22
+
23
+
/* Arch specific stuff which needs to be saved per task.
24
+
* However these items are not so important so as to earn a place in
25
+
* struct thread_info
26
+
*/
27
+
struct thread_struct {
28
+
unsigned long ksp; /* kernel mode stack pointer */
29
+
unsigned long callee_reg; /* pointer to callee regs */
30
+
unsigned long fault_address; /* dbls as brkpt holder as well */
31
+
unsigned long cause_code; /* Exception Cause Code (ECR) */
32
+
};
33
+
34
+
#define INIT_THREAD { \
35
+
.ksp = sizeof(init_stack) + (unsigned long) init_stack, \
36
+
}
37
+
38
+
/* Forward declaration, a strange C thing */
39
+
struct task_struct;
40
+
41
+
/*
42
+
* Return saved PC of a blocked thread.
43
+
*/
44
+
unsigned long thread_saved_pc(struct task_struct *t);
45
+
46
+
#define task_pt_regs(p) \
47
+
((struct pt_regs *)(THREAD_SIZE - 4 + (void *)task_stack_page(p)) - 1)
48
+
49
+
/* Free all resources held by a thread. */
50
+
#define release_thread(thread) do { } while (0)
51
+
52
+
/* Prepare to copy thread state - unlazy all lazy status */
53
+
#define prepare_to_copy(tsk) do { } while (0)
54
+
55
+
#define cpu_relax() do { } while (0)
56
+
57
+
/*
58
+
* Create a new kernel thread
59
+
*/
60
+
61
+
extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags);
62
+
63
+
#define copy_segments(tsk, mm) do { } while (0)
64
+
#define release_segments(mm) do { } while (0)
65
+
66
+
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->ret)
67
+
68
+
/*
69
+
* Where abouts of Task's sp, fp, blink when it was last seen in kernel mode.
70
+
* These can't be derived from pt_regs as that would give correp user-mode val
71
+
*/
72
+
#define KSTK_ESP(tsk) (tsk->thread.ksp)
73
+
#define KSTK_BLINK(tsk) (*((unsigned int *)((KSTK_ESP(tsk)) + (13+1+1)*4)))
74
+
#define KSTK_FP(tsk) (*((unsigned int *)((KSTK_ESP(tsk)) + (13+1)*4)))
75
+
76
+
/*
77
+
* Do necessary setup to start up a newly executed thread.
78
+
*
79
+
* E1,E2 so that Interrupts are enabled in user mode
80
+
* L set, so Loop inhibited to begin with
81
+
* lp_start and lp_end seeded with bogus non-zero values so to easily catch
82
+
* the ARC700 sr to lp_start hardware bug
83
+
*/
84
+
#define start_thread(_regs, _pc, _usp) \
85
+
do { \
86
+
set_fs(USER_DS); /* reads from user space */ \
87
+
(_regs)->ret = (_pc); \
88
+
/* Interrupts enabled in User Mode */ \
89
+
(_regs)->status32 = STATUS_U_MASK | STATUS_L_MASK \
90
+
| STATUS_E1_MASK | STATUS_E2_MASK; \
91
+
(_regs)->sp = (_usp); \
92
+
/* bogus seed values for debugging */ \
93
+
(_regs)->lp_start = 0x10; \
94
+
(_regs)->lp_end = 0x80; \
95
+
} while (0)
96
+
97
+
extern unsigned int get_wchan(struct task_struct *p);
98
+
99
+
/*
100
+
* Default implementation of macro that returns current
101
+
* instruction pointer ("program counter").
102
+
* Should the PC register be read instead ? This macro does not seem to
103
+
* be used in many places so this wont be all that bad.
104
+
*/
105
+
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
106
+
107
+
#endif /* !__ASSEMBLY__ */
108
+
109
+
/* Kernels Virtual memory area.
110
+
* Unlike other architectures(MIPS, sh, cris ) ARC 700 does not have a
111
+
* "kernel translated" region (like KSEG2 in MIPS). So we use a upper part
112
+
* of the translated bottom 2GB for kernel virtual memory and protect
113
+
* these pages from user accesses by disabling Ru, Eu and Wu.
114
+
*/
115
+
#define VMALLOC_SIZE (0x10000000) /* 256M */
116
+
#define VMALLOC_START (PAGE_OFFSET - VMALLOC_SIZE)
117
+
#define VMALLOC_END (PAGE_OFFSET)
118
+
119
+
/* Most of the architectures seem to be keeping some kind of padding between
120
+
* userspace TASK_SIZE and PAGE_OFFSET. i.e TASK_SIZE != PAGE_OFFSET.
121
+
*/
122
+
#define USER_KERNEL_GUTTER 0x10000000
123
+
124
+
/* User address space:
125
+
* On ARC700, CPU allows the entire lower half of 32 bit address space to be
126
+
* translated. Thus potentially 2G (0:0x7FFF_FFFF) could be User vaddr space.
127
+
* However we steal 256M for kernel addr (0x7000_0000:0x7FFF_FFFF) and another
128
+
* 256M (0x6000_0000:0x6FFF_FFFF) is gutter between user/kernel spaces
129
+
* Thus total User vaddr space is (0:0x5FFF_FFFF)
130
+
*/
131
+
#define TASK_SIZE (PAGE_OFFSET - VMALLOC_SIZE - USER_KERNEL_GUTTER)
132
+
133
+
#define STACK_TOP TASK_SIZE
134
+
#define STACK_TOP_MAX STACK_TOP
135
+
136
+
/* This decides where the kernel will search for a free chunk of vm
137
+
* space during mmap's.
138
+
*/
139
+
#define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
140
+
141
+
#endif /* __KERNEL__ */
142
+
143
+
#endif /* __ASM_ARC_PROCESSOR_H */
+126
arch/arc/include/asm/ptrace.h
+126
arch/arc/include/asm/ptrace.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*
8
+
* Amit Bhor, Sameer Dhavale: Codito Technologies 2004
9
+
*/
10
+
11
+
#ifndef __ASM_ARC_PTRACE_H
12
+
#define __ASM_ARC_PTRACE_H
13
+
14
+
#ifdef __KERNEL__
15
+
16
+
#ifndef __ASSEMBLY__
17
+
18
+
/* THE pt_regs: Defines how regs are saved during entry into kernel */
19
+
20
+
struct pt_regs {
21
+
/*
22
+
* 1 word gutter after reg-file has been saved
23
+
* Technically not needed, Since SP always points to a "full" location
24
+
* (vs. "empty"). But pt_regs is shared with tools....
25
+
*/
26
+
long res;
27
+
28
+
/* Real registers */
29
+
long bta; /* bta_l1, bta_l2, erbta */
30
+
long lp_start;
31
+
long lp_end;
32
+
long lp_count;
33
+
long status32; /* status32_l1, status32_l2, erstatus */
34
+
long ret; /* ilink1, ilink2 or eret */
35
+
long blink;
36
+
long fp;
37
+
long r26; /* gp */
38
+
long r12;
39
+
long r11;
40
+
long r10;
41
+
long r9;
42
+
long r8;
43
+
long r7;
44
+
long r6;
45
+
long r5;
46
+
long r4;
47
+
long r3;
48
+
long r2;
49
+
long r1;
50
+
long r0;
51
+
long sp; /* user/kernel sp depending on where we came from */
52
+
long orig_r0;
53
+
long orig_r8; /*to distinguish bet excp, sys call, int1 or int2 */
54
+
};
55
+
56
+
/* Callee saved registers - need to be saved only when you are scheduled out */
57
+
58
+
struct callee_regs {
59
+
long res; /* Again this is not needed */
60
+
long r25;
61
+
long r24;
62
+
long r23;
63
+
long r22;
64
+
long r21;
65
+
long r20;
66
+
long r19;
67
+
long r18;
68
+
long r17;
69
+
long r16;
70
+
long r15;
71
+
long r14;
72
+
long r13;
73
+
};
74
+
75
+
#define instruction_pointer(regs) ((regs)->ret)
76
+
#define profile_pc(regs) instruction_pointer(regs)
77
+
78
+
/* return 1 if user mode or 0 if kernel mode */
79
+
#define user_mode(regs) (regs->status32 & STATUS_U_MASK)
80
+
81
+
#define user_stack_pointer(regs)\
82
+
({ unsigned int sp; \
83
+
if (user_mode(regs)) \
84
+
sp = (regs)->sp;\
85
+
else \
86
+
sp = -1; \
87
+
sp; \
88
+
})
89
+
#endif /* !__ASSEMBLY__ */
90
+
91
+
#endif /* __KERNEL__ */
92
+
93
+
#ifndef __ASSEMBLY__
94
+
/*
95
+
* Userspace ABI: Register state needed by
96
+
* -ptrace (gdbserver)
97
+
* -sigcontext (SA_SIGNINFO signal frame)
98
+
*
99
+
* This is to decouple pt_regs from user-space ABI, to be able to change it
100
+
* w/o affecting the ABI.
101
+
* Although the layout (initial padding) is similar to pt_regs to have some
102
+
* optimizations when copying pt_regs to/from user_regs_struct.
103
+
*
104
+
* Also, sigcontext only care about the scratch regs as that is what we really
105
+
* save/restore for signal handling.
106
+
*/
107
+
struct user_regs_struct {
108
+
109
+
struct scratch {
110
+
long pad;
111
+
long bta, lp_start, lp_end, lp_count;
112
+
long status32, ret, blink, fp, gp;
113
+
long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
114
+
long sp;
115
+
} scratch;
116
+
struct callee {
117
+
long pad;
118
+
long r25, r24, r23, r22, r21, r20;
119
+
long r19, r18, r17, r16, r15, r14, r13;
120
+
} callee;
121
+
long efa; /* break pt addr, for break points in delay slots */
122
+
long stop_pc; /* give dbg stop_pc directly after checking orig_r8 */
123
+
};
124
+
#endif /* !__ASSEMBLY__ */
125
+
126
+
#endif /* __ASM_PTRACE_H */
+17
arch/arc/include/asm/sections.h
+17
arch/arc/include/asm/sections.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*/
8
+
9
+
#ifndef _ASM_ARC_SECTIONS_H
10
+
#define _ASM_ARC_SECTIONS_H
11
+
12
+
#include <asm-generic/sections.h>
13
+
14
+
extern char _int_vec_base_lds[];
15
+
extern char __arc_dccm_base[];
16
+
17
+
#endif
+121
arch/arc/include/asm/thread_info.h
+121
arch/arc/include/asm/thread_info.h
···
1
+
/*
2
+
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
3
+
*
4
+
* This program is free software; you can redistribute it and/or modify
5
+
* it under the terms of the GNU General Public License version 2 as
6
+
* published by the Free Software Foundation.
7
+
*
8
+
* Vineetg: Oct 2009
9
+
* No need for ARC specific thread_info allocator (kmalloc/free). This is
10
+
* anyways one page allocation, thus slab alloc can be short-circuited and
11
+
* the generic version (get_free_page) would be loads better.
12
+
*
13
+
* Sameer Dhavale: Codito Technologies 2004
14
+
*/
15
+
16
+
#ifndef _ASM_THREAD_INFO_H
17
+
#define _ASM_THREAD_INFO_H
18
+
19
+
#ifdef __KERNEL__
20
+
21
+
#include <asm/page.h>
22
+
23
+
#ifdef CONFIG_16KSTACKS
24
+
#define THREAD_SIZE_ORDER 1
25
+
#else
26
+
#define THREAD_SIZE_ORDER 0
27
+
#endif
28
+
29
+
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
30
+
31
+
#ifndef __ASSEMBLY__
32
+
33
+
#include <linux/thread_info.h>
34
+
#include <asm/segment.h>
35
+
36
+
/*
37
+
* low level task data that entry.S needs immediate access to
38
+
* - this struct should fit entirely inside of one cache line
39
+
* - this struct shares the supervisor stack pages
40
+
* - if the contents of this structure are changed, the assembly constants
41
+
* must also be changed
42
+
*/
43
+
struct thread_info {
44
+
unsigned long flags; /* low level flags */
45
+
int preempt_count; /* 0 => preemptable, <0 => BUG */
46
+
struct task_struct *task; /* main task structure */
47
+
mm_segment_t addr_limit; /* thread address space */
48
+
struct exec_domain *exec_domain;/* execution domain */
49
+
__u32 cpu; /* current CPU */
50
+
unsigned long thr_ptr; /* TLS ptr */
51
+
struct restart_block restart_block;
52
+
};
53
+
54
+
/*
55
+
* macros/functions for gaining access to the thread information structure
56
+
*
57
+
* preempt_count needs to be 1 initially, until the scheduler is functional.
58
+
*/
59
+
#define INIT_THREAD_INFO(tsk) \
60
+
{ \
61
+
.task = &tsk, \
62
+
.exec_domain = &default_exec_domain, \
63
+
.flags = 0, \
64
+
.cpu = 0, \
65
+
.preempt_count = INIT_PREEMPT_COUNT, \
66
+
.addr_limit = KERNEL_DS, \
67
+
.restart_block = { \
68
+
.fn = do_no_restart_syscall, \
69
+
}, \
70
+
}
71
+
72
+
#define init_thread_info (init_thread_union.thread_info)
73
+
#define init_stack (init_thread_union.stack)
74
+
75
+
static inline __attribute_const__ struct thread_info *current_thread_info(void)
76
+
{
77
+
register unsigned long sp asm("sp");
78
+
return (struct thread_info *)(sp & ~(THREAD_SIZE - 1));
79
+
}
80
+
81
+
#endif /* !__ASSEMBLY__ */
82
+
83
+
#define PREEMPT_ACTIVE 0x10000000
84
+
85
+
/*
86
+
* thread information flags
87
+
* - these are process state flags that various assembly files may need to
88
+
* access
89
+
* - pending work-to-be-done flags are in LSW
90
+
* - other flags in MSW
91
+
*/
92
+
#define TIF_RESTORE_SIGMASK 0 /* restore sig mask in do_signal() */
93
+
#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
94
+
#define TIF_SIGPENDING 2 /* signal pending */
95
+
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
96
+
#define TIF_SYSCALL_AUDIT 4 /* syscall auditing active */
97
+
#define TIF_SYSCALL_TRACE 15 /* syscall trace active */
98
+
99
+
/* true if poll_idle() is polling TIF_NEED_RESCHED */
100
+
#define TIF_MEMDIE 16
101
+
102
+
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
103
+
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
104
+
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
105
+
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
106
+
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
107
+
#define _TIF_MEMDIE (1<<TIF_MEMDIE)
108
+
109
+
/* work to do on interrupt/exception return */
110
+
#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
111
+
_TIF_NOTIFY_RESUME)
112
+
113
+
/*
114
+
* _TIF_ALLWORK_MASK includes SYSCALL_TRACE, but we don't need it.
115
+
* SYSCALL_TRACE is anways seperately/unconditionally tested right after a
116
+
* syscall, so all that reamins to be tested is _TIF_WORK_MASK
117
+
*/
118
+
119
+
#endif /* __KERNEL__ */
120
+
121
+
#endif /* _ASM_THREAD_INFO_H */