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Diffstat (limited to 'arch/sh/mm/pmb.c')
-rw-r--r--arch/sh/mm/pmb.c90
1 files changed, 37 insertions, 53 deletions
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index a4662e2782c..7160c9fd6fe 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -3,7 +3,7 @@
*
* Privileged Space Mapping Buffer (PMB) Support.
*
- * Copyright (C) 2005 - 2010 Paul Mundt
+ * Copyright (C) 2005 - 2011 Paul Mundt
* Copyright (C) 2010 Matt Fleming
*
* This file is subject to the terms and conditions of the GNU General Public
@@ -12,10 +12,9 @@
*/
#include <linux/init.h>
#include <linux/kernel.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
#include <linux/cpu.h>
#include <linux/module.h>
-#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/debugfs.h>
#include <linux/fs.h>
@@ -26,7 +25,6 @@
#include <linux/vmalloc.h>
#include <asm/cacheflush.h>
#include <asm/sizes.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
@@ -41,7 +39,7 @@ struct pmb_entry {
unsigned long flags;
unsigned long size;
- spinlock_t lock;
+ raw_spinlock_t lock;
/*
* 0 .. NR_PMB_ENTRIES for specific entry selection, or
@@ -266,7 +264,7 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
memset(pmbe, 0, sizeof(struct pmb_entry));
- spin_lock_init(&pmbe->lock);
+ raw_spin_lock_init(&pmbe->lock);
pmbe->vpn = vpn;
pmbe->ppn = ppn;
@@ -323,14 +321,16 @@ static void __clear_pmb_entry(struct pmb_entry *pmbe)
writel_uncached(data_val & ~PMB_V, data);
}
+#ifdef CONFIG_PM
static void set_pmb_entry(struct pmb_entry *pmbe)
{
unsigned long flags;
- spin_lock_irqsave(&pmbe->lock, flags);
+ raw_spin_lock_irqsave(&pmbe->lock, flags);
__set_pmb_entry(pmbe);
- spin_unlock_irqrestore(&pmbe->lock, flags);
+ raw_spin_unlock_irqrestore(&pmbe->lock, flags);
}
+#endif /* CONFIG_PM */
int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
unsigned long size, pgprot_t prot)
@@ -340,6 +340,8 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
unsigned long flags, pmb_flags;
int i, mapped;
+ if (size < SZ_16M)
+ return -EINVAL;
if (!pmb_addr_valid(vaddr, size))
return -EFAULT;
if (pmb_mapping_exists(vaddr, phys, size))
@@ -365,7 +367,7 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
return PTR_ERR(pmbe);
}
- spin_lock_irqsave(&pmbe->lock, flags);
+ raw_spin_lock_irqsave(&pmbe->lock, flags);
pmbe->size = pmb_sizes[i].size;
@@ -380,9 +382,10 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
* entries for easier tear-down.
*/
if (likely(pmbp)) {
- spin_lock(&pmbp->lock);
+ raw_spin_lock_nested(&pmbp->lock,
+ SINGLE_DEPTH_NESTING);
pmbp->link = pmbe;
- spin_unlock(&pmbp->lock);
+ raw_spin_unlock(&pmbp->lock);
}
pmbp = pmbe;
@@ -395,7 +398,7 @@ int pmb_bolt_mapping(unsigned long vaddr, phys_addr_t phys,
i--;
mapped++;
- spin_unlock_irqrestore(&pmbe->lock, flags);
+ raw_spin_unlock_irqrestore(&pmbe->lock, flags);
}
} while (size >= SZ_16M);
@@ -624,15 +627,14 @@ static void __init pmb_synchronize(void)
continue;
}
- spin_lock_irqsave(&pmbe->lock, irqflags);
+ raw_spin_lock_irqsave(&pmbe->lock, irqflags);
for (j = 0; j < ARRAY_SIZE(pmb_sizes); j++)
if (pmb_sizes[j].flag == size)
pmbe->size = pmb_sizes[j].size;
if (pmbp) {
- spin_lock(&pmbp->lock);
-
+ raw_spin_lock_nested(&pmbp->lock, SINGLE_DEPTH_NESTING);
/*
* Compare the previous entry against the current one to
* see if the entries span a contiguous mapping. If so,
@@ -641,13 +643,12 @@ static void __init pmb_synchronize(void)
*/
if (pmb_can_merge(pmbp, pmbe))
pmbp->link = pmbe;
-
- spin_unlock(&pmbp->lock);
+ raw_spin_unlock(&pmbp->lock);
}
pmbp = pmbe;
- spin_unlock_irqrestore(&pmbe->lock, irqflags);
+ raw_spin_unlock_irqrestore(&pmbe->lock, irqflags);
}
}
@@ -679,7 +680,7 @@ static void __init pmb_merge(struct pmb_entry *head)
/*
* The merged page size must be valid.
*/
- if (!pmb_size_valid(newsize))
+ if (!depth || !pmb_size_valid(newsize))
return;
head->flags &= ~PMB_SZ_MASK;
@@ -754,7 +755,7 @@ static void __init pmb_resize(void)
/*
* Found it, now resize it.
*/
- spin_lock_irqsave(&pmbe->lock, flags);
+ raw_spin_lock_irqsave(&pmbe->lock, flags);
pmbe->size = SZ_16M;
pmbe->flags &= ~PMB_SZ_MASK;
@@ -764,10 +765,10 @@ static void __init pmb_resize(void)
__set_pmb_entry(pmbe);
- spin_unlock_irqrestore(&pmbe->lock, flags);
+ raw_spin_unlock_irqrestore(&pmbe->lock, flags);
}
- read_lock(&pmb_rwlock);
+ read_unlock(&pmb_rwlock);
}
#endif
@@ -802,7 +803,7 @@ void __init pmb_init(void)
writel_uncached(0, PMB_IRMCR);
/* Flush out the TLB */
- __raw_writel(__raw_readl(MMUCR) | MMUCR_TI, MMUCR);
+ local_flush_tlb_all();
ctrl_barrier();
}
@@ -863,57 +864,40 @@ static int __init pmb_debugfs_init(void)
struct dentry *dentry;
dentry = debugfs_create_file("pmb", S_IFREG | S_IRUGO,
- sh_debugfs_root, NULL, &pmb_debugfs_fops);
+ arch_debugfs_dir, NULL, &pmb_debugfs_fops);
if (!dentry)
return -ENOMEM;
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
return 0;
}
subsys_initcall(pmb_debugfs_init);
#ifdef CONFIG_PM
-static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state)
+static void pmb_syscore_resume(void)
{
- static pm_message_t prev_state;
+ struct pmb_entry *pmbe;
int i;
- /* Restore the PMB after a resume from hibernation */
- if (state.event == PM_EVENT_ON &&
- prev_state.event == PM_EVENT_FREEZE) {
- struct pmb_entry *pmbe;
-
- read_lock(&pmb_rwlock);
+ read_lock(&pmb_rwlock);
- for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
- if (test_bit(i, pmb_map)) {
- pmbe = &pmb_entry_list[i];
- set_pmb_entry(pmbe);
- }
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
+ if (test_bit(i, pmb_map)) {
+ pmbe = &pmb_entry_list[i];
+ set_pmb_entry(pmbe);
}
-
- read_unlock(&pmb_rwlock);
}
- prev_state = state;
-
- return 0;
-}
-
-static int pmb_sysdev_resume(struct sys_device *dev)
-{
- return pmb_sysdev_suspend(dev, PMSG_ON);
+ read_unlock(&pmb_rwlock);
}
-static struct sysdev_driver pmb_sysdev_driver = {
- .suspend = pmb_sysdev_suspend,
- .resume = pmb_sysdev_resume,
+static struct syscore_ops pmb_syscore_ops = {
+ .resume = pmb_syscore_resume,
};
static int __init pmb_sysdev_init(void)
{
- return sysdev_driver_register(&cpu_sysdev_class, &pmb_sysdev_driver);
+ register_syscore_ops(&pmb_syscore_ops);
+ return 0;
}
subsys_initcall(pmb_sysdev_init);
#endif
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 20:40:06 +0000