summaryrefslogtreecommitdiff
path: root/arch/arc/mm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arc/mm')
-rw-r--r--arch/arc/mm/Makefile5
-rw-r--r--arch/arc/mm/cache.c5
-rw-r--r--arch/arc/mm/dma.c5
-rw-r--r--arch/arc/mm/extable.c5
-rw-r--r--arch/arc/mm/fault.c14
-rw-r--r--arch/arc/mm/highmem.c6
-rw-r--r--arch/arc/mm/init.c5
-rw-r--r--arch/arc/mm/ioremap.c5
-rw-r--r--arch/arc/mm/mmap.c5
-rw-r--r--arch/arc/mm/tlb.c18
-rw-r--r--arch/arc/mm/tlbex.S5
11 files changed, 22 insertions, 56 deletions
diff --git a/arch/arc/mm/Makefile b/arch/arc/mm/Makefile
index 3703a4969349..633a773369ca 100644
--- a/arch/arc/mm/Makefile
+++ b/arch/arc/mm/Makefile
@@ -1,10 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 as
-# published by the Free Software Foundation.
-#
obj-y := extable.o ioremap.o dma.o fault.o init.o
obj-y += tlb.o tlbex.o cache.o mmap.o
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 63e6e6504699..a2fbea3ee07c 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ARC Cache Management
*
* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/module.h>
diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c
index 1525ac00fd02..0bf1468c35a3 100644
--- a/arch/arc/mm/dma.c
+++ b/arch/arc/mm/dma.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/dma-noncoherent.h>
diff --git a/arch/arc/mm/extable.c b/arch/arc/mm/extable.c
index 72125a34e780..b06b09ddf924 100644
--- a/arch/arc/mm/extable.c
+++ b/arch/arc/mm/extable.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* Borrowed heavily from MIPS
*/
diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c
index 8df1638259f3..8cca03480bb2 100644
--- a/arch/arc/mm/fault.c
+++ b/arch/arc/mm/fault.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
/* Page Fault Handling for ARC (TLB Miss / ProtV)
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/signal.h>
@@ -66,7 +63,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
struct vm_area_struct *vma = NULL;
struct task_struct *tsk = current;
struct mm_struct *mm = tsk->mm;
- int si_code = 0;
+ int si_code = SEGV_MAPERR;
int ret;
vm_fault_t fault;
int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */
@@ -81,16 +78,14 @@ void do_page_fault(unsigned long address, struct pt_regs *regs)
* only copy the information from the master page table,
* nothing more.
*/
- if (address >= VMALLOC_START) {
+ if (address >= VMALLOC_START && !user_mode(regs)) {
ret = handle_kernel_vaddr_fault(address);
if (unlikely(ret))
- goto bad_area_nosemaphore;
+ goto no_context;
else
return;
}
- si_code = SEGV_MAPERR;
-
/*
* If we're in an interrupt or have no user
* context, we must not take the fault..
@@ -198,7 +193,6 @@ good_area:
bad_area:
up_read(&mm->mmap_sem);
-bad_area_nosemaphore:
/* User mode accesses just cause a SIGSEGV */
if (user_mode(regs)) {
tsk->thread.fault_address = address;
diff --git a/arch/arc/mm/highmem.c b/arch/arc/mm/highmem.c
index 11f57e2ced8a..a4856bfaedf3 100644
--- a/arch/arc/mm/highmem.c
+++ b/arch/arc/mm/highmem.c
@@ -1,10 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2015 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
*/
#include <linux/memblock.h>
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 02b7a3b20d7c..0920c969c466 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/kernel.h>
diff --git a/arch/arc/mm/ioremap.c b/arch/arc/mm/ioremap.c
index 9881bd740ccc..fac4adc90204 100644
--- a/arch/arc/mm/ioremap.c
+++ b/arch/arc/mm/ioremap.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/vmalloc.h>
diff --git a/arch/arc/mm/mmap.c b/arch/arc/mm/mmap.c
index 2e13683dfb24..722d26b94307 100644
--- a/arch/arc/mm/mmap.c
+++ b/arch/arc/mm/mmap.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* ARC700 mmap
*
* (started from arm version - for VIPT alias handling)
*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/fs.h>
diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c
index 4097764fea23..10025e199353 100644
--- a/arch/arc/mm/tlb.c
+++ b/arch/arc/mm/tlb.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* TLB Management (flush/create/diagnostics) for ARC700
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* vineetg: Aug 2011
* -Reintroduce duplicate PD fixup - some customer chips still have the issue
*
@@ -911,9 +908,11 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
struct pt_regs *regs)
{
struct cpuinfo_arc_mmu *mmu = &cpuinfo_arc700[smp_processor_id()].mmu;
- unsigned int pd0[mmu->ways];
unsigned long flags;
- int set;
+ int set, n_ways = mmu->ways;
+
+ n_ways = min(n_ways, 4);
+ BUG_ON(mmu->ways > 4);
local_irq_save(flags);
@@ -921,9 +920,10 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
for (set = 0; set < mmu->sets; set++) {
int is_valid, way;
+ unsigned int pd0[4];
/* read out all the ways of current set */
- for (way = 0, is_valid = 0; way < mmu->ways; way++) {
+ for (way = 0, is_valid = 0; way < n_ways; way++) {
write_aux_reg(ARC_REG_TLBINDEX,
SET_WAY_TO_IDX(mmu, set, way));
write_aux_reg(ARC_REG_TLBCOMMAND, TLBRead);
@@ -937,14 +937,14 @@ void do_tlb_overlap_fault(unsigned long cause, unsigned long address,
continue;
/* Scan the set for duplicate ways: needs a nested loop */
- for (way = 0; way < mmu->ways - 1; way++) {
+ for (way = 0; way < n_ways - 1; way++) {
int n;
if (!pd0[way])
continue;
- for (n = way + 1; n < mmu->ways; n++) {
+ for (n = way + 1; n < n_ways; n++) {
if (pd0[way] != pd0[n])
continue;
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S
index 0e1e47a67c73..471a97bf492d 100644
--- a/arch/arc/mm/tlbex.S
+++ b/arch/arc/mm/tlbex.S
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* TLB Exception Handling for ARC
*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
* Vineetg: April 2011 :
* -MMU v1: moved out legacy code into a seperate file
* -MMU v3: PD{0,1} bits layout changed: They don't overlap anymore,
generated by cgit (git 2.34.1) at 2024-05-02 13:03:52 +0000