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-rw-r--r--arch/unicore32/Kconfig7
-rw-r--r--arch/unicore32/include/asm/Kbuild1
-rw-r--r--arch/unicore32/include/asm/bug.h5
-rw-r--r--arch/unicore32/include/asm/cmpxchg.h2
-rw-r--r--arch/unicore32/include/asm/kvm_para.h1
-rw-r--r--arch/unicore32/include/asm/processor.h5
-rw-r--r--arch/unicore32/include/asm/ptrace.h76
-rw-r--r--arch/unicore32/include/uapi/asm/Kbuild7
-rw-r--r--arch/unicore32/include/uapi/asm/byteorder.h (renamed from arch/unicore32/include/asm/byteorder.h)0
-rw-r--r--arch/unicore32/include/uapi/asm/ptrace.h90
-rw-r--r--arch/unicore32/include/uapi/asm/sigcontext.h (renamed from arch/unicore32/include/asm/sigcontext.h)0
-rw-r--r--arch/unicore32/include/uapi/asm/unistd.h (renamed from arch/unicore32/include/asm/unistd.h)1
-rw-r--r--arch/unicore32/kernel/entry.S20
-rw-r--r--arch/unicore32/kernel/process.c58
-rw-r--r--arch/unicore32/kernel/setup.h6
-rw-r--r--arch/unicore32/kernel/sys.c63
-rw-r--r--arch/unicore32/mm/fault.c37
17 files changed, 160 insertions, 219 deletions
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index e5c5473e69ce..c4fbb21e802b 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -16,6 +16,8 @@ config UNICORE32
16 select ARCH_WANT_FRAME_POINTERS 16 select ARCH_WANT_FRAME_POINTERS
17 select GENERIC_IOMAP 17 select GENERIC_IOMAP
18 select MODULES_USE_ELF_REL 18 select MODULES_USE_ELF_REL
19 select GENERIC_KERNEL_THREAD
20 select GENERIC_KERNEL_EXECVE
19 help 21 help
20 UniCore-32 is 32-bit Instruction Set Architecture, 22 UniCore-32 is 32-bit Instruction Set Architecture,
21 including a series of low-power-consumption RISC chip 23 including a series of low-power-consumption RISC chip
@@ -64,6 +66,9 @@ config GENERIC_CALIBRATE_DELAY
64config ARCH_MAY_HAVE_PC_FDC 66config ARCH_MAY_HAVE_PC_FDC
65 bool 67 bool
66 68
69config ZONE_DMA
70 def_bool y
71
67config NEED_DMA_MAP_STATE 72config NEED_DMA_MAP_STATE
68 def_bool y 73 def_bool y
69 74
@@ -216,7 +221,7 @@ config PUV3_GPIO
216 bool 221 bool
217 depends on !ARCH_FPGA 222 depends on !ARCH_FPGA
218 select GENERIC_GPIO 223 select GENERIC_GPIO
219 select GPIO_SYSFS if EXPERIMENTAL 224 select GPIO_SYSFS
220 default y 225 default y
221 226
222if PUV3_NB0916 227if PUV3_NB0916
diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild
index c910c9857e11..601e92f18af6 100644
--- a/arch/unicore32/include/asm/Kbuild
+++ b/arch/unicore32/include/asm/Kbuild
@@ -1,4 +1,3 @@
1include include/asm-generic/Kbuild.asm
2 1
3generic-y += atomic.h 2generic-y += atomic.h
4generic-y += auxvec.h 3generic-y += auxvec.h
diff --git a/arch/unicore32/include/asm/bug.h b/arch/unicore32/include/asm/bug.h
index b1ff8cadb086..93a56f3e2344 100644
--- a/arch/unicore32/include/asm/bug.h
+++ b/arch/unicore32/include/asm/bug.h
@@ -19,9 +19,4 @@ extern void die(const char *msg, struct pt_regs *regs, int err);
19extern void uc32_notify_die(const char *str, struct pt_regs *regs, 19extern void uc32_notify_die(const char *str, struct pt_regs *regs,
20 struct siginfo *info, unsigned long err, unsigned long trap); 20 struct siginfo *info, unsigned long err, unsigned long trap);
21 21
22extern asmlinkage void __backtrace(void);
23extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
24
25extern void __show_regs(struct pt_regs *);
26
27#endif /* __UNICORE_BUG_H__ */ 22#endif /* __UNICORE_BUG_H__ */
diff --git a/arch/unicore32/include/asm/cmpxchg.h b/arch/unicore32/include/asm/cmpxchg.h
index df4d5acfd19f..8e797ad4fa24 100644
--- a/arch/unicore32/include/asm/cmpxchg.h
+++ b/arch/unicore32/include/asm/cmpxchg.h
@@ -35,7 +35,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
35 : "memory", "cc"); 35 : "memory", "cc");
36 break; 36 break;
37 default: 37 default:
38 ret = __xchg_bad_pointer(); 38 __xchg_bad_pointer();
39 } 39 }
40 40
41 return ret; 41 return ret;
diff --git a/arch/unicore32/include/asm/kvm_para.h b/arch/unicore32/include/asm/kvm_para.h
deleted file mode 100644
index 14fab8f0b957..000000000000
--- a/arch/unicore32/include/asm/kvm_para.h
+++ /dev/null
@@ -1 +0,0 @@
1#include <asm-generic/kvm_para.h>
diff --git a/arch/unicore32/include/asm/processor.h b/arch/unicore32/include/asm/processor.h
index 14382cb09657..4eaa42167667 100644
--- a/arch/unicore32/include/asm/processor.h
+++ b/arch/unicore32/include/asm/processor.h
@@ -72,11 +72,6 @@ unsigned long get_wchan(struct task_struct *p);
72 72
73#define cpu_relax() barrier() 73#define cpu_relax() barrier()
74 74
75/*
76 * Create a new kernel thread
77 */
78extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
79
80#define task_pt_regs(p) \ 75#define task_pt_regs(p) \
81 ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) 76 ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
82 77
diff --git a/arch/unicore32/include/asm/ptrace.h b/arch/unicore32/include/asm/ptrace.h
index b9caf9b0997b..726749dab52f 100644
--- a/arch/unicore32/include/asm/ptrace.h
+++ b/arch/unicore32/include/asm/ptrace.h
@@ -12,80 +12,10 @@
12#ifndef __UNICORE_PTRACE_H__ 12#ifndef __UNICORE_PTRACE_H__
13#define __UNICORE_PTRACE_H__ 13#define __UNICORE_PTRACE_H__
14 14
15#define PTRACE_GET_THREAD_AREA 22 15#include <uapi/asm/ptrace.h>
16
17/*
18 * PSR bits
19 */
20#define USER_MODE 0x00000010
21#define REAL_MODE 0x00000011
22#define INTR_MODE 0x00000012
23#define PRIV_MODE 0x00000013
24#define ABRT_MODE 0x00000017
25#define EXTN_MODE 0x0000001b
26#define SUSR_MODE 0x0000001f
27#define MODE_MASK 0x0000001f
28#define PSR_R_BIT 0x00000040
29#define PSR_I_BIT 0x00000080
30#define PSR_V_BIT 0x10000000
31#define PSR_C_BIT 0x20000000
32#define PSR_Z_BIT 0x40000000
33#define PSR_S_BIT 0x80000000
34
35/*
36 * Groups of PSR bits
37 */
38#define PSR_f 0xff000000 /* Flags */
39#define PSR_c 0x000000ff /* Control */
40 16
41#ifndef __ASSEMBLY__ 17#ifndef __ASSEMBLY__
42 18
43/*
44 * This struct defines the way the registers are stored on the
45 * stack during a system call. Note that sizeof(struct pt_regs)
46 * has to be a multiple of 8.
47 */
48struct pt_regs {
49 unsigned long uregs[34];
50};
51
52#define UCreg_asr uregs[32]
53#define UCreg_pc uregs[31]
54#define UCreg_lr uregs[30]
55#define UCreg_sp uregs[29]
56#define UCreg_ip uregs[28]
57#define UCreg_fp uregs[27]
58#define UCreg_26 uregs[26]
59#define UCreg_25 uregs[25]
60#define UCreg_24 uregs[24]
61#define UCreg_23 uregs[23]
62#define UCreg_22 uregs[22]
63#define UCreg_21 uregs[21]
64#define UCreg_20 uregs[20]
65#define UCreg_19 uregs[19]
66#define UCreg_18 uregs[18]
67#define UCreg_17 uregs[17]
68#define UCreg_16 uregs[16]
69#define UCreg_15 uregs[15]
70#define UCreg_14 uregs[14]
71#define UCreg_13 uregs[13]
72#define UCreg_12 uregs[12]
73#define UCreg_11 uregs[11]
74#define UCreg_10 uregs[10]
75#define UCreg_09 uregs[9]
76#define UCreg_08 uregs[8]
77#define UCreg_07 uregs[7]
78#define UCreg_06 uregs[6]
79#define UCreg_05 uregs[5]
80#define UCreg_04 uregs[4]
81#define UCreg_03 uregs[3]
82#define UCreg_02 uregs[2]
83#define UCreg_01 uregs[1]
84#define UCreg_00 uregs[0]
85#define UCreg_ORIG_00 uregs[33]
86
87#ifdef __KERNEL__
88
89#define user_mode(regs) \ 19#define user_mode(regs) \
90 (processor_mode(regs) == USER_MODE) 20 (processor_mode(regs) == USER_MODE)
91 21
@@ -125,9 +55,5 @@ static inline int valid_user_regs(struct pt_regs *regs)
125 55
126#define instruction_pointer(regs) ((regs)->UCreg_pc) 56#define instruction_pointer(regs) ((regs)->UCreg_pc)
127 57
128#endif /* __KERNEL__ */
129
130#endif /* __ASSEMBLY__ */ 58#endif /* __ASSEMBLY__ */
131
132#endif 59#endif
133
diff --git a/arch/unicore32/include/uapi/asm/Kbuild b/arch/unicore32/include/uapi/asm/Kbuild
index baebb3da1d44..0514d7ad6855 100644
--- a/arch/unicore32/include/uapi/asm/Kbuild
+++ b/arch/unicore32/include/uapi/asm/Kbuild
@@ -1,3 +1,10 @@
1# UAPI Header export list 1# UAPI Header export list
2include include/uapi/asm-generic/Kbuild.asm 2include include/uapi/asm-generic/Kbuild.asm
3 3
4header-y += byteorder.h
5header-y += kvm_para.h
6header-y += ptrace.h
7header-y += sigcontext.h
8header-y += unistd.h
9
10generic-y += kvm_para.h
diff --git a/arch/unicore32/include/asm/byteorder.h b/arch/unicore32/include/uapi/asm/byteorder.h
index ebe1b3fef3e3..ebe1b3fef3e3 100644
--- a/arch/unicore32/include/asm/byteorder.h
+++ b/arch/unicore32/include/uapi/asm/byteorder.h
diff --git a/arch/unicore32/include/uapi/asm/ptrace.h b/arch/unicore32/include/uapi/asm/ptrace.h
new file mode 100644
index 000000000000..187aa2e98a53
--- /dev/null
+++ b/arch/unicore32/include/uapi/asm/ptrace.h
@@ -0,0 +1,90 @@
1/*
2 * linux/arch/unicore32/include/asm/ptrace.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 _UAPI__UNICORE_PTRACE_H__
13#define _UAPI__UNICORE_PTRACE_H__
14
15#define PTRACE_GET_THREAD_AREA 22
16
17/*
18 * PSR bits
19 */
20#define USER_MODE 0x00000010
21#define REAL_MODE 0x00000011
22#define INTR_MODE 0x00000012
23#define PRIV_MODE 0x00000013
24#define ABRT_MODE 0x00000017
25#define EXTN_MODE 0x0000001b
26#define SUSR_MODE 0x0000001f
27#define MODE_MASK 0x0000001f
28#define PSR_R_BIT 0x00000040
29#define PSR_I_BIT 0x00000080
30#define PSR_V_BIT 0x10000000
31#define PSR_C_BIT 0x20000000
32#define PSR_Z_BIT 0x40000000
33#define PSR_S_BIT 0x80000000
34
35/*
36 * Groups of PSR bits
37 */
38#define PSR_f 0xff000000 /* Flags */
39#define PSR_c 0x000000ff /* Control */
40
41#ifndef __ASSEMBLY__
42
43/*
44 * This struct defines the way the registers are stored on the
45 * stack during a system call. Note that sizeof(struct pt_regs)
46 * has to be a multiple of 8.
47 */
48struct pt_regs {
49 unsigned long uregs[34];
50};
51
52#define UCreg_asr uregs[32]
53#define UCreg_pc uregs[31]
54#define UCreg_lr uregs[30]
55#define UCreg_sp uregs[29]
56#define UCreg_ip uregs[28]
57#define UCreg_fp uregs[27]
58#define UCreg_26 uregs[26]
59#define UCreg_25 uregs[25]
60#define UCreg_24 uregs[24]
61#define UCreg_23 uregs[23]
62#define UCreg_22 uregs[22]
63#define UCreg_21 uregs[21]
64#define UCreg_20 uregs[20]
65#define UCreg_19 uregs[19]
66#define UCreg_18 uregs[18]
67#define UCreg_17 uregs[17]
68#define UCreg_16 uregs[16]
69#define UCreg_15 uregs[15]
70#define UCreg_14 uregs[14]
71#define UCreg_13 uregs[13]
72#define UCreg_12 uregs[12]
73#define UCreg_11 uregs[11]
74#define UCreg_10 uregs[10]
75#define UCreg_09 uregs[9]
76#define UCreg_08 uregs[8]
77#define UCreg_07 uregs[7]
78#define UCreg_06 uregs[6]
79#define UCreg_05 uregs[5]
80#define UCreg_04 uregs[4]
81#define UCreg_03 uregs[3]
82#define UCreg_02 uregs[2]
83#define UCreg_01 uregs[1]
84#define UCreg_00 uregs[0]
85#define UCreg_ORIG_00 uregs[33]
86
87
88#endif /* __ASSEMBLY__ */
89
90#endif /* _UAPI__UNICORE_PTRACE_H__ */
diff --git a/arch/unicore32/include/asm/sigcontext.h b/arch/unicore32/include/uapi/asm/sigcontext.h
index 6a2d7671c052..6a2d7671c052 100644
--- a/arch/unicore32/include/asm/sigcontext.h
+++ b/arch/unicore32/include/uapi/asm/sigcontext.h
diff --git a/arch/unicore32/include/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h
index 2abcf61c615d..d18a3be89b38 100644
--- a/arch/unicore32/include/asm/unistd.h
+++ b/arch/unicore32/include/uapi/asm/unistd.h
@@ -12,3 +12,4 @@
12 12
13/* Use the standard ABI for syscalls. */ 13/* Use the standard ABI for syscalls. */
14#include <asm-generic/unistd.h> 14#include <asm-generic/unistd.h>
15#define __ARCH_WANT_SYS_EXECVE
diff --git a/arch/unicore32/kernel/entry.S b/arch/unicore32/kernel/entry.S
index dcb87ab19ddd..7049350c790f 100644
--- a/arch/unicore32/kernel/entry.S
+++ b/arch/unicore32/kernel/entry.S
@@ -573,17 +573,16 @@ ENDPROC(ret_to_user)
573 */ 573 */
574ENTRY(ret_from_fork) 574ENTRY(ret_from_fork)
575 b.l schedule_tail 575 b.l schedule_tail
576 get_thread_info tsk
577 ldw r1, [tsk+], #TI_FLAGS @ check for syscall tracing
578 mov why, #1
579 cand.a r1, #_TIF_SYSCALL_TRACE @ are we tracing syscalls?
580 beq ret_slow_syscall
581 mov r1, sp
582 mov r0, #1 @ trace exit [IP = 1]
583 b.l syscall_trace
584 b ret_slow_syscall 576 b ret_slow_syscall
585ENDPROC(ret_from_fork) 577ENDPROC(ret_from_fork)
586 578
579ENTRY(ret_from_kernel_thread)
580 b.l schedule_tail
581 mov r0, r5
582 adr lr, ret_slow_syscall
583 mov pc, r4
584ENDPROC(ret_from_kernel_thread)
585
587/*============================================================================= 586/*=============================================================================
588 * SWI handler 587 * SWI handler
589 *----------------------------------------------------------------------------- 588 *-----------------------------------------------------------------------------
@@ -669,11 +668,6 @@ __cr_alignment:
669#endif 668#endif
670 .ltorg 669 .ltorg
671 670
672ENTRY(sys_execve)
673 add r3, sp, #S_OFF
674 b __sys_execve
675ENDPROC(sys_execve)
676
677ENTRY(sys_clone) 671ENTRY(sys_clone)
678 add ip, sp, #S_OFF 672 add ip, sp, #S_OFF
679 stw ip, [sp+], #4 673 stw ip, [sp+], #4
diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c
index b008586dad75..a8fe265ce2c0 100644
--- a/arch/unicore32/kernel/process.c
+++ b/arch/unicore32/kernel/process.c
@@ -258,6 +258,7 @@ void release_thread(struct task_struct *dead_task)
258} 258}
259 259
260asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); 260asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
261asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread");
261 262
262int 263int
263copy_thread(unsigned long clone_flags, unsigned long stack_start, 264copy_thread(unsigned long clone_flags, unsigned long stack_start,
@@ -266,17 +267,22 @@ copy_thread(unsigned long clone_flags, unsigned long stack_start,
266 struct thread_info *thread = task_thread_info(p); 267 struct thread_info *thread = task_thread_info(p);
267 struct pt_regs *childregs = task_pt_regs(p); 268 struct pt_regs *childregs = task_pt_regs(p);
268 269
269 *childregs = *regs;
270 childregs->UCreg_00 = 0;
271 childregs->UCreg_sp = stack_start;
272
273 memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save)); 270 memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save));
274 thread->cpu_context.sp = (unsigned long)childregs; 271 thread->cpu_context.sp = (unsigned long)childregs;
275 thread->cpu_context.pc = (unsigned long)ret_from_fork; 272 if (unlikely(!regs)) {
276 273 thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread;
277 if (clone_flags & CLONE_SETTLS) 274 thread->cpu_context.r4 = stack_start;
278 childregs->UCreg_16 = regs->UCreg_03; 275 thread->cpu_context.r5 = stk_sz;
276 memset(childregs, 0, sizeof(struct pt_regs));
277 } else {
278 thread->cpu_context.pc = (unsigned long)ret_from_fork;
279 *childregs = *regs;
280 childregs->UCreg_00 = 0;
281 childregs->UCreg_sp = stack_start;
279 282
283 if (clone_flags & CLONE_SETTLS)
284 childregs->UCreg_16 = regs->UCreg_03;
285 }
280 return 0; 286 return 0;
281} 287}
282 288
@@ -305,42 +311,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fp)
305} 311}
306EXPORT_SYMBOL(dump_fpu); 312EXPORT_SYMBOL(dump_fpu);
307 313
308/*
309 * Shuffle the argument into the correct register before calling the
310 * thread function. r1 is the thread argument, r2 is the pointer to
311 * the thread function, and r3 points to the exit function.
312 */
313asm(".pushsection .text\n"
314" .align\n"
315" .type kernel_thread_helper, #function\n"
316"kernel_thread_helper:\n"
317" mov.a asr, r7\n"
318" mov r0, r4\n"
319" mov lr, r6\n"
320" mov pc, r5\n"
321" .size kernel_thread_helper, . - kernel_thread_helper\n"
322" .popsection");
323
324/*
325 * Create a kernel thread.
326 */
327pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
328{
329 struct pt_regs regs;
330
331 memset(&regs, 0, sizeof(regs));
332
333 regs.UCreg_04 = (unsigned long)arg;
334 regs.UCreg_05 = (unsigned long)fn;
335 regs.UCreg_06 = (unsigned long)do_exit;
336 regs.UCreg_07 = PRIV_MODE;
337 regs.UCreg_pc = (unsigned long)kernel_thread_helper;
338 regs.UCreg_asr = regs.UCreg_07 | PSR_I_BIT;
339
340 return do_fork(flags|CLONE_VM|CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
341}
342EXPORT_SYMBOL(kernel_thread);
343
344unsigned long get_wchan(struct task_struct *p) 314unsigned long get_wchan(struct task_struct *p)
345{ 315{
346 struct stackframe frame; 316 struct stackframe frame;
diff --git a/arch/unicore32/kernel/setup.h b/arch/unicore32/kernel/setup.h
index f23955028a18..30f749da8f73 100644
--- a/arch/unicore32/kernel/setup.h
+++ b/arch/unicore32/kernel/setup.h
@@ -30,4 +30,10 @@ extern char __vectors_start[], __vectors_end[];
30extern void kernel_thread_helper(void); 30extern void kernel_thread_helper(void);
31 31
32extern void __init early_signal_init(void); 32extern void __init early_signal_init(void);
33
34extern asmlinkage void __backtrace(void);
35extern asmlinkage void c_backtrace(unsigned long fp, int pmode);
36
37extern void __show_regs(struct pt_regs *);
38
33#endif 39#endif
diff --git a/arch/unicore32/kernel/sys.c b/arch/unicore32/kernel/sys.c
index fabdee96110b..9680134b31f0 100644
--- a/arch/unicore32/kernel/sys.c
+++ b/arch/unicore32/kernel/sys.c
@@ -42,69 +42,6 @@ asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp,
42 parent_tid, child_tid); 42 parent_tid, child_tid);
43} 43}
44 44
45/* sys_execve() executes a new program.
46 * This is called indirectly via a small wrapper
47 */
48asmlinkage long __sys_execve(const char __user *filename,
49 const char __user *const __user *argv,
50 const char __user *const __user *envp,
51 struct pt_regs *regs)
52{
53 int error;
54 struct filename *fn;
55
56 fn = getname(filename);
57 error = PTR_ERR(fn);
58 if (IS_ERR(fn))
59 goto out;
60 error = do_execve(fn->name, argv, envp, regs);
61 putname(fn);
62out:
63 return error;
64}
65
66int kernel_execve(const char *filename,
67 const char *const argv[],
68 const char *const envp[])
69{
70 struct pt_regs regs;
71 int ret;
72
73 memset(&regs, 0, sizeof(struct pt_regs));
74 ret = do_execve(filename,
75 (const char __user *const __user *)argv,
76 (const char __user *const __user *)envp, &regs);
77 if (ret < 0)
78 goto out;
79
80 /*
81 * Save argc to the register structure for userspace.
82 */
83 regs.UCreg_00 = ret;
84
85 /*
86 * We were successful. We won't be returning to our caller, but
87 * instead to user space by manipulating the kernel stack.
88 */
89 asm("add r0, %0, %1\n\t"
90 "mov r1, %2\n\t"
91 "mov r2, %3\n\t"
92 "mov r22, #0\n\t" /* not a syscall */
93 "mov r23, %0\n\t" /* thread structure */
94 "b.l memmove\n\t" /* copy regs to top of stack */
95 "mov sp, r0\n\t" /* reposition stack pointer */
96 "b ret_to_user"
97 :
98 : "r" (current_thread_info()),
99 "Ir" (THREAD_START_SP - sizeof(regs)),
100 "r" (&regs),
101 "Ir" (sizeof(regs))
102 : "r0", "r1", "r2", "r3", "ip", "lr", "memory");
103
104 out:
105 return ret;
106}
107
108/* Note: used by the compat code even in 64-bit Linux. */ 45/* Note: used by the compat code even in 64-bit Linux. */
109SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, 46SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len,
110 unsigned long, prot, unsigned long, flags, 47 unsigned long, prot, unsigned long, flags,
diff --git a/arch/unicore32/mm/fault.c b/arch/unicore32/mm/fault.c
index 2eeb9c04cab0..f9b5c10bccee 100644
--- a/arch/unicore32/mm/fault.c
+++ b/arch/unicore32/mm/fault.c
@@ -168,7 +168,7 @@ static inline bool access_error(unsigned int fsr, struct vm_area_struct *vma)
168} 168}
169 169
170static int __do_pf(struct mm_struct *mm, unsigned long addr, unsigned int fsr, 170static int __do_pf(struct mm_struct *mm, unsigned long addr, unsigned int fsr,
171 struct task_struct *tsk) 171 unsigned int flags, struct task_struct *tsk)
172{ 172{
173 struct vm_area_struct *vma; 173 struct vm_area_struct *vma;
174 int fault; 174 int fault;
@@ -194,14 +194,7 @@ good_area:
194 * If for any reason at all we couldn't handle the fault, make 194 * If for any reason at all we couldn't handle the fault, make
195 * sure we exit gracefully rather than endlessly redo the fault. 195 * sure we exit gracefully rather than endlessly redo the fault.
196 */ 196 */
197 fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, 197 fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, flags);
198 (!(fsr ^ 0x12)) ? FAULT_FLAG_WRITE : 0);
199 if (unlikely(fault & VM_FAULT_ERROR))
200 return fault;
201 if (fault & VM_FAULT_MAJOR)
202 tsk->maj_flt++;
203 else
204 tsk->min_flt++;
205 return fault; 198 return fault;
206 199
207check_stack: 200check_stack:
@@ -216,6 +209,8 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
216 struct task_struct *tsk; 209 struct task_struct *tsk;
217 struct mm_struct *mm; 210 struct mm_struct *mm;
218 int fault, sig, code; 211 int fault, sig, code;
212 unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
213 ((!(fsr ^ 0x12)) ? FAULT_FLAG_WRITE : 0);
219 214
220 tsk = current; 215 tsk = current;
221 mm = tsk->mm; 216 mm = tsk->mm;
@@ -236,6 +231,7 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
236 if (!user_mode(regs) 231 if (!user_mode(regs)
237 && !search_exception_tables(regs->UCreg_pc)) 232 && !search_exception_tables(regs->UCreg_pc))
238 goto no_context; 233 goto no_context;
234retry:
239 down_read(&mm->mmap_sem); 235 down_read(&mm->mmap_sem);
240 } else { 236 } else {
241 /* 237 /*
@@ -251,7 +247,28 @@ static int do_pf(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
251#endif 247#endif
252 } 248 }
253 249
254 fault = __do_pf(mm, addr, fsr, tsk); 250 fault = __do_pf(mm, addr, fsr, flags, tsk);
251
252 /* If we need to retry but a fatal signal is pending, handle the
253 * signal first. We do not need to release the mmap_sem because
254 * it would already be released in __lock_page_or_retry in
255 * mm/filemap.c. */
256 if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
257 return 0;
258
259 if (!(fault & VM_FAULT_ERROR) && (flags & FAULT_FLAG_ALLOW_RETRY)) {
260 if (fault & VM_FAULT_MAJOR)
261 tsk->maj_flt++;
262 else
263 tsk->min_flt++;
264 if (fault & VM_FAULT_RETRY) {
265 /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
266 * of starvation. */
267 flags &= ~FAULT_FLAG_ALLOW_RETRY;
268 goto retry;
269 }
270 }
271
255 up_read(&mm->mmap_sem); 272 up_read(&mm->mmap_sem);
256 273
257 /* 274 /*
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-28 07:40:05 -0500