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authorGuanXuetao <gxt@mprc.pku.edu.cn>2011-01-15 05:13:50 -0500
committerGuanXuetao <gxt@mprc.pku.edu.cn>2011-03-16 21:19:05 -0400
commit87c1a3fb7c07322dfd63a63dd6d42339ad52ddee (patch)
treec090cce270aa4ca455bbfadb975f35f3eb01ccab /arch/unicore32
parent790edb61c0d87d1f1daafcaaa8f7c66b7b82bdad (diff)
unicore32 core architecture: generic elf and ksyms stuff
This patch includes some generic stuff including elf and ksyms. Because all one-line asm-generic headers are auto-generated by ASM_GENERIC_HEADERS in arch/unicore32/Makefile, so the rest seems very little. ELF handling functions and module handling functions are also here. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/unicore32')
-rw-r--r--arch/unicore32/include/asm/elf.h94
-rw-r--r--arch/unicore32/include/asm/string.h38
-rw-r--r--arch/unicore32/kernel/asm-offsets.c112
-rw-r--r--arch/unicore32/kernel/elf.c38
-rw-r--r--arch/unicore32/kernel/ksyms.c99
-rw-r--r--arch/unicore32/kernel/ksyms.h15
-rw-r--r--arch/unicore32/kernel/module.c152
-rw-r--r--arch/unicore32/mm/proc-syms.c23
8 files changed, 571 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/elf.h b/arch/unicore32/include/asm/elf.h
new file mode 100644
index 000000000000..829042d07722
--- /dev/null
+++ b/arch/unicore32/include/asm/elf.h
@@ -0,0 +1,94 @@
1/*
2 * linux/arch/unicore32/include/asm/elf.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __UNICORE_ELF_H__
14#define __UNICORE_ELF_H__
15
16#include <asm/hwcap.h>
17
18/*
19 * ELF register definitions..
20 */
21#include <asm/ptrace.h>
22
23typedef unsigned long elf_greg_t;
24typedef unsigned long elf_freg_t[3];
25
26#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
27typedef elf_greg_t elf_gregset_t[ELF_NGREG];
28
29typedef struct fp_state elf_fpregset_t;
30
31#define EM_UNICORE 110
32
33#define R_UNICORE_NONE 0
34#define R_UNICORE_PC24 1
35#define R_UNICORE_ABS32 2
36#define R_UNICORE_CALL 28
37#define R_UNICORE_JUMP24 29
38
39/*
40 * These are used to set parameters in the core dumps.
41 */
42#define ELF_CLASS ELFCLASS32
43#define ELF_DATA ELFDATA2LSB
44#define ELF_ARCH EM_UNICORE
45
46/*
47 * This yields a string that ld.so will use to load implementation
48 * specific libraries for optimization. This is more specific in
49 * intent than poking at uname or /proc/cpuinfo.
50 *
51 */
52#define ELF_PLATFORM_SIZE 8
53#define ELF_PLATFORM (elf_platform)
54
55extern char elf_platform[];
56
57struct elf32_hdr;
58
59/*
60 * This is used to ensure we don't load something for the wrong architecture.
61 */
62extern int elf_check_arch(const struct elf32_hdr *);
63#define elf_check_arch elf_check_arch
64
65struct task_struct;
66int dump_task_regs(struct task_struct *t, elf_gregset_t *elfregs);
67#define ELF_CORE_COPY_TASK_REGS dump_task_regs
68
69#define ELF_EXEC_PAGESIZE 4096
70
71/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
72 use of this is to invoke "./ld.so someprog" to test out a new version of
73 the loader. We need to make sure that it is out of the way of the program
74 that it will "exec", and that there is sufficient room for the brk. */
75
76#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
77
78/* When the program starts, a1 contains a pointer to a function to be
79 registered with atexit, as per the SVR4 ABI. A value of 0 means we
80 have no such handler. */
81#define ELF_PLAT_INIT(_r, load_addr) {(_r)->UCreg_00 = 0; }
82
83extern void elf_set_personality(const struct elf32_hdr *);
84#define SET_PERSONALITY(ex) elf_set_personality(&(ex))
85
86struct mm_struct;
87extern unsigned long arch_randomize_brk(struct mm_struct *mm);
88#define arch_randomize_brk arch_randomize_brk
89
90extern int vectors_user_mapping(void);
91#define arch_setup_additional_pages(bprm, uses_interp) vectors_user_mapping()
92#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
93
94#endif
diff --git a/arch/unicore32/include/asm/string.h b/arch/unicore32/include/asm/string.h
new file mode 100644
index 000000000000..55264c84369a
--- /dev/null
+++ b/arch/unicore32/include/asm/string.h
@@ -0,0 +1,38 @@
1/*
2 * linux/arch/unicore32/include/asm/string.h
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#ifndef __UNICORE_STRING_H__
13#define __UNICORE_STRING_H__
14
15/*
16 * We don't do inline string functions, since the
17 * optimised inline asm versions are not small.
18 */
19
20#define __HAVE_ARCH_STRRCHR
21extern char *strrchr(const char *s, int c);
22
23#define __HAVE_ARCH_STRCHR
24extern char *strchr(const char *s, int c);
25
26#define __HAVE_ARCH_MEMCPY
27extern void *memcpy(void *, const void *, __kernel_size_t);
28
29#define __HAVE_ARCH_MEMMOVE
30extern void *memmove(void *, const void *, __kernel_size_t);
31
32#define __HAVE_ARCH_MEMCHR
33extern void *memchr(const void *, int, __kernel_size_t);
34
35#define __HAVE_ARCH_MEMSET
36extern void *memset(void *, int, __kernel_size_t);
37
38#endif
diff --git a/arch/unicore32/kernel/asm-offsets.c b/arch/unicore32/kernel/asm-offsets.c
new file mode 100644
index 000000000000..ffcbe7536ca7
--- /dev/null
+++ b/arch/unicore32/kernel/asm-offsets.c
@@ -0,0 +1,112 @@
1/*
2 * linux/arch/unicore32/kernel/asm-offsets.c
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * Generate definitions needed by assembly language modules.
9 * This code generates raw asm output which is post-processed to extract
10 * and format the required data.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16#include <linux/sched.h>
17#include <linux/mm.h>
18#include <linux/dma-mapping.h>
19#include <linux/kbuild.h>
20#include <linux/suspend.h>
21#include <linux/thread_info.h>
22#include <asm/memory.h>
23#include <asm/suspend.h>
24
25/*
26 * GCC 3.0, 3.1: general bad code generation.
27 * GCC 3.2.0: incorrect function argument offset calculation.
28 * GCC 3.2.x: miscompiles NEW_AUX_ENT in fs/binfmt_elf.c
29 * (http://gcc.gnu.org/PR8896) and incorrect structure
30 * initialisation in fs/jffs2/erase.c
31 */
32#if (__GNUC__ < 4)
33#error Your compiler should upgrade to uc4
34#error Known good compilers: 4.2.2
35#endif
36
37int main(void)
38{
39 DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
40 BLANK();
41 DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
42 DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
43 DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
44 DEFINE(TI_TASK, offsetof(struct thread_info, task));
45 DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
46 DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
47 DEFINE(TI_CPU_SAVE, offsetof(struct thread_info, cpu_context));
48 DEFINE(TI_USED_CP, offsetof(struct thread_info, used_cp));
49#ifdef CONFIG_UNICORE_FPU_F64
50 DEFINE(TI_FPSTATE, offsetof(struct thread_info, fpstate));
51#endif
52 BLANK();
53 DEFINE(S_R0, offsetof(struct pt_regs, UCreg_00));
54 DEFINE(S_R1, offsetof(struct pt_regs, UCreg_01));
55 DEFINE(S_R2, offsetof(struct pt_regs, UCreg_02));
56 DEFINE(S_R3, offsetof(struct pt_regs, UCreg_03));
57 DEFINE(S_R4, offsetof(struct pt_regs, UCreg_04));
58 DEFINE(S_R5, offsetof(struct pt_regs, UCreg_05));
59 DEFINE(S_R6, offsetof(struct pt_regs, UCreg_06));
60 DEFINE(S_R7, offsetof(struct pt_regs, UCreg_07));
61 DEFINE(S_R8, offsetof(struct pt_regs, UCreg_08));
62 DEFINE(S_R9, offsetof(struct pt_regs, UCreg_09));
63 DEFINE(S_R10, offsetof(struct pt_regs, UCreg_10));
64 DEFINE(S_R11, offsetof(struct pt_regs, UCreg_11));
65 DEFINE(S_R12, offsetof(struct pt_regs, UCreg_12));
66 DEFINE(S_R13, offsetof(struct pt_regs, UCreg_13));
67 DEFINE(S_R14, offsetof(struct pt_regs, UCreg_14));
68 DEFINE(S_R15, offsetof(struct pt_regs, UCreg_15));
69 DEFINE(S_R16, offsetof(struct pt_regs, UCreg_16));
70 DEFINE(S_R17, offsetof(struct pt_regs, UCreg_17));
71 DEFINE(S_R18, offsetof(struct pt_regs, UCreg_18));
72 DEFINE(S_R19, offsetof(struct pt_regs, UCreg_19));
73 DEFINE(S_R20, offsetof(struct pt_regs, UCreg_20));
74 DEFINE(S_R21, offsetof(struct pt_regs, UCreg_21));
75 DEFINE(S_R22, offsetof(struct pt_regs, UCreg_22));
76 DEFINE(S_R23, offsetof(struct pt_regs, UCreg_23));
77 DEFINE(S_R24, offsetof(struct pt_regs, UCreg_24));
78 DEFINE(S_R25, offsetof(struct pt_regs, UCreg_25));
79 DEFINE(S_R26, offsetof(struct pt_regs, UCreg_26));
80 DEFINE(S_FP, offsetof(struct pt_regs, UCreg_fp));
81 DEFINE(S_IP, offsetof(struct pt_regs, UCreg_ip));
82 DEFINE(S_SP, offsetof(struct pt_regs, UCreg_sp));
83 DEFINE(S_LR, offsetof(struct pt_regs, UCreg_lr));
84 DEFINE(S_PC, offsetof(struct pt_regs, UCreg_pc));
85 DEFINE(S_PSR, offsetof(struct pt_regs, UCreg_asr));
86 DEFINE(S_OLD_R0, offsetof(struct pt_regs, UCreg_ORIG_00));
87 DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
88 BLANK();
89 DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
90 DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
91 BLANK();
92 DEFINE(VM_EXEC, VM_EXEC);
93 BLANK();
94 DEFINE(PAGE_SZ, PAGE_SIZE);
95 BLANK();
96 DEFINE(SYS_ERROR0, 0x9f0000);
97 BLANK();
98 DEFINE(PBE_ADDRESS, offsetof(struct pbe, address));
99 DEFINE(PBE_ORIN_ADDRESS, offsetof(struct pbe, orig_address));
100 DEFINE(PBE_NEXT, offsetof(struct pbe, next));
101 DEFINE(SWSUSP_CPU, offsetof(struct swsusp_arch_regs, \
102 cpu_context));
103#ifdef CONFIG_UNICORE_FPU_F64
104 DEFINE(SWSUSP_FPSTATE, offsetof(struct swsusp_arch_regs, \
105 fpstate));
106#endif
107 BLANK();
108 DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL);
109 DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE);
110 DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE);
111 return 0;
112}
diff --git a/arch/unicore32/kernel/elf.c b/arch/unicore32/kernel/elf.c
new file mode 100644
index 000000000000..0a176734fefa
--- /dev/null
+++ b/arch/unicore32/kernel/elf.c
@@ -0,0 +1,38 @@
1/*
2 * linux/arch/unicore32/kernel/elf.c
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/module.h>
13#include <linux/sched.h>
14#include <linux/personality.h>
15#include <linux/binfmts.h>
16#include <linux/elf.h>
17
18int elf_check_arch(const struct elf32_hdr *x)
19{
20 /* Make sure it's an UniCore executable */
21 if (x->e_machine != EM_UNICORE)
22 return 0;
23
24 /* Make sure the entry address is reasonable */
25 if (x->e_entry & 3)
26 return 0;
27
28 return 1;
29}
30EXPORT_SYMBOL(elf_check_arch);
31
32void elf_set_personality(const struct elf32_hdr *x)
33{
34 unsigned int personality = PER_LINUX;
35
36 set_personality(personality);
37}
38EXPORT_SYMBOL(elf_set_personality);
diff --git a/arch/unicore32/kernel/ksyms.c b/arch/unicore32/kernel/ksyms.c
new file mode 100644
index 000000000000..a8970809428a
--- /dev/null
+++ b/arch/unicore32/kernel/ksyms.c
@@ -0,0 +1,99 @@
1/*
2 * linux/arch/unicore32/kernel/ksyms.c
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/module.h>
13#include <linux/sched.h>
14#include <linux/string.h>
15#include <linux/cryptohash.h>
16#include <linux/delay.h>
17#include <linux/in6.h>
18#include <linux/syscalls.h>
19#include <linux/uaccess.h>
20#include <linux/io.h>
21
22#include <asm/checksum.h>
23#include <asm/system.h>
24
25#include "ksyms.h"
26
27EXPORT_SYMBOL(__uc32_find_next_zero_bit);
28EXPORT_SYMBOL(__uc32_find_next_bit);
29
30EXPORT_SYMBOL(__backtrace);
31
32 /* platform dependent support */
33EXPORT_SYMBOL(__udelay);
34EXPORT_SYMBOL(__const_udelay);
35
36 /* networking */
37EXPORT_SYMBOL(csum_partial);
38EXPORT_SYMBOL(csum_partial_copy_from_user);
39EXPORT_SYMBOL(csum_partial_copy_nocheck);
40EXPORT_SYMBOL(__csum_ipv6_magic);
41
42 /* io */
43#ifndef __raw_readsb
44EXPORT_SYMBOL(__raw_readsb);
45#endif
46#ifndef __raw_readsw
47EXPORT_SYMBOL(__raw_readsw);
48#endif
49#ifndef __raw_readsl
50EXPORT_SYMBOL(__raw_readsl);
51#endif
52#ifndef __raw_writesb
53EXPORT_SYMBOL(__raw_writesb);
54#endif
55#ifndef __raw_writesw
56EXPORT_SYMBOL(__raw_writesw);
57#endif
58#ifndef __raw_writesl
59EXPORT_SYMBOL(__raw_writesl);
60#endif
61
62 /* string / mem functions */
63EXPORT_SYMBOL(strchr);
64EXPORT_SYMBOL(strrchr);
65EXPORT_SYMBOL(memset);
66EXPORT_SYMBOL(memcpy);
67EXPORT_SYMBOL(memmove);
68EXPORT_SYMBOL(memchr);
69
70 /* user mem (segment) */
71EXPORT_SYMBOL(__strnlen_user);
72EXPORT_SYMBOL(__strncpy_from_user);
73
74EXPORT_SYMBOL(copy_page);
75
76EXPORT_SYMBOL(__copy_from_user);
77EXPORT_SYMBOL(__copy_to_user);
78EXPORT_SYMBOL(__clear_user);
79
80EXPORT_SYMBOL(__get_user_1);
81EXPORT_SYMBOL(__get_user_2);
82EXPORT_SYMBOL(__get_user_4);
83
84EXPORT_SYMBOL(__put_user_1);
85EXPORT_SYMBOL(__put_user_2);
86EXPORT_SYMBOL(__put_user_4);
87EXPORT_SYMBOL(__put_user_8);
88
89EXPORT_SYMBOL(__ashldi3);
90EXPORT_SYMBOL(__ashrdi3);
91EXPORT_SYMBOL(__divsi3);
92EXPORT_SYMBOL(__lshrdi3);
93EXPORT_SYMBOL(__modsi3);
94EXPORT_SYMBOL(__muldi3);
95EXPORT_SYMBOL(__ucmpdi2);
96EXPORT_SYMBOL(__udivsi3);
97EXPORT_SYMBOL(__umodsi3);
98EXPORT_SYMBOL(__bswapsi2);
99
diff --git a/arch/unicore32/kernel/ksyms.h b/arch/unicore32/kernel/ksyms.h
new file mode 100644
index 000000000000..185cdc712d03
--- /dev/null
+++ b/arch/unicore32/kernel/ksyms.h
@@ -0,0 +1,15 @@
1/*
2 * libgcc functions - functions that are used internally by the
3 * compiler... (prototypes are not correct though, but that
4 * doesn't really matter since they're not versioned).
5 */
6extern void __ashldi3(void);
7extern void __ashrdi3(void);
8extern void __divsi3(void);
9extern void __lshrdi3(void);
10extern void __modsi3(void);
11extern void __muldi3(void);
12extern void __ucmpdi2(void);
13extern void __udivsi3(void);
14extern void __umodsi3(void);
15extern void __bswapsi2(void);
diff --git a/arch/unicore32/kernel/module.c b/arch/unicore32/kernel/module.c
new file mode 100644
index 000000000000..3e5a38d71a1e
--- /dev/null
+++ b/arch/unicore32/kernel/module.c
@@ -0,0 +1,152 @@
1/*
2 * linux/arch/unicore32/kernel/module.c
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/module.h>
13#include <linux/moduleloader.h>
14#include <linux/kernel.h>
15#include <linux/mm.h>
16#include <linux/elf.h>
17#include <linux/vmalloc.h>
18#include <linux/fs.h>
19#include <linux/string.h>
20#include <linux/gfp.h>
21
22#include <asm/pgtable.h>
23#include <asm/sections.h>
24
25void *module_alloc(unsigned long size)
26{
27 struct vm_struct *area;
28
29 size = PAGE_ALIGN(size);
30 if (!size)
31 return NULL;
32
33 area = __get_vm_area(size, VM_ALLOC, MODULES_VADDR, MODULES_END);
34 if (!area)
35 return NULL;
36
37 return __vmalloc_area(area, GFP_KERNEL, PAGE_KERNEL_EXEC);
38}
39
40void module_free(struct module *module, void *region)
41{
42 vfree(region);
43}
44
45int module_frob_arch_sections(Elf_Ehdr *hdr,
46 Elf_Shdr *sechdrs,
47 char *secstrings,
48 struct module *mod)
49{
50 return 0;
51}
52
53int
54apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex,
55 unsigned int relindex, struct module *module)
56{
57 Elf32_Shdr *symsec = sechdrs + symindex;
58 Elf32_Shdr *relsec = sechdrs + relindex;
59 Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
60 Elf32_Rel *rel = (void *)relsec->sh_addr;
61 unsigned int i;
62
63 for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rel); i++, rel++) {
64 unsigned long loc;
65 Elf32_Sym *sym;
66 s32 offset;
67
68 offset = ELF32_R_SYM(rel->r_info);
69 if (offset < 0 || offset >
70 (symsec->sh_size / sizeof(Elf32_Sym))) {
71 printk(KERN_ERR "%s: bad relocation, "
72 "section %d reloc %d\n",
73 module->name, relindex, i);
74 return -ENOEXEC;
75 }
76
77 sym = ((Elf32_Sym *)symsec->sh_addr) + offset;
78
79 if (rel->r_offset < 0 || rel->r_offset >
80 dstsec->sh_size - sizeof(u32)) {
81 printk(KERN_ERR "%s: out of bounds relocation, "
82 "section %d reloc %d offset %d size %d\n",
83 module->name, relindex, i, rel->r_offset,
84 dstsec->sh_size);
85 return -ENOEXEC;
86 }
87
88 loc = dstsec->sh_addr + rel->r_offset;
89
90 switch (ELF32_R_TYPE(rel->r_info)) {
91 case R_UNICORE_NONE:
92 /* ignore */
93 break;
94
95 case R_UNICORE_ABS32:
96 *(u32 *)loc += sym->st_value;
97 break;
98
99 case R_UNICORE_PC24:
100 case R_UNICORE_CALL:
101 case R_UNICORE_JUMP24:
102 offset = (*(u32 *)loc & 0x00ffffff) << 2;
103 if (offset & 0x02000000)
104 offset -= 0x04000000;
105
106 offset += sym->st_value - loc;
107 if (offset & 3 ||
108 offset <= (s32)0xfe000000 ||
109 offset >= (s32)0x02000000) {
110 printk(KERN_ERR
111 "%s: relocation out of range, section "
112 "%d reloc %d sym '%s'\n", module->name,
113 relindex, i, strtab + sym->st_name);
114 return -ENOEXEC;
115 }
116
117 offset >>= 2;
118
119 *(u32 *)loc &= 0xff000000;
120 *(u32 *)loc |= offset & 0x00ffffff;
121 break;
122
123 default:
124 printk(KERN_ERR "%s: unknown relocation: %u\n",
125 module->name, ELF32_R_TYPE(rel->r_info));
126 return -ENOEXEC;
127 }
128 }
129 return 0;
130}
131
132int
133apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
134 unsigned int symindex, unsigned int relsec,
135 struct module *module)
136{
137 printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n",
138 module->name);
139 return -ENOEXEC;
140}
141
142int
143module_finalize(const Elf32_Ehdr *hdr, const Elf_Shdr *sechdrs,
144 struct module *module)
145{
146 return 0;
147}
148
149void
150module_arch_cleanup(struct module *mod)
151{
152}
diff --git a/arch/unicore32/mm/proc-syms.c b/arch/unicore32/mm/proc-syms.c
new file mode 100644
index 000000000000..f30071e3665d
--- /dev/null
+++ b/arch/unicore32/mm/proc-syms.c
@@ -0,0 +1,23 @@
1/*
2 * linux/arch/unicore32/mm/proc-syms.c
3 *
4 * Code specific to PKUnity SoC and UniCore ISA
5 *
6 * Copyright (C) 2001-2010 GUAN Xue-tao
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/module.h>
13#include <linux/mm.h>
14
15#include <asm/cacheflush.h>
16#include <asm/tlbflush.h>
17#include <asm/page.h>
18
19EXPORT_SYMBOL(cpu_dcache_clean_area);
20EXPORT_SYMBOL(cpu_set_pte);
21
22EXPORT_SYMBOL(__cpuc_dma_flush_range);
23EXPORT_SYMBOL(__cpuc_dma_clean_range);
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