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-rw-r--r--arch/sh/include/asm/mmu.h4
-rw-r--r--arch/sh/kernel/head_32.S2
-rw-r--r--arch/sh/mm/pmb.c83
3 files changed, 42 insertions, 47 deletions
diff --git a/arch/sh/include/asm/mmu.h b/arch/sh/include/asm/mmu.h
index 151bc922701b..44c904341414 100644
--- a/arch/sh/include/asm/mmu.h
+++ b/arch/sh/include/asm/mmu.h
@@ -11,7 +11,9 @@
#define PMB_ADDR 0xf6100000
#define PMB_DATA 0xf7100000
-#define PMB_ENTRY_MAX 16
+
+#define NR_PMB_ENTRIES 16
+
#define PMB_E_MASK 0x0000000f
#define PMB_E_SHIFT 8
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index 83f2b84b58da..91ae76277d8f 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -236,7 +236,7 @@ ENTRY(_stext)
* r10 = number of entries we've setup so far
*/
mov #0, r1
- mov #PMB_ENTRY_MAX, r0
+ mov #NR_PMB_ENTRIES, r0
.Lagain:
mov.l r1, @r3 /* Clear PMB_ADDR entry */
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 509a444a30ab..924f3e4b3a82 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -21,32 +21,31 @@
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/err.h>
+#include <linux/io.h>
+#include <asm/sizes.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/mmu.h>
-#include <asm/io.h>
#include <asm/mmu_context.h>
-#define NR_PMB_ENTRIES 16
-
-static void __pmb_unmap(struct pmb_entry *);
+static void pmb_unmap_entry(struct pmb_entry *);
static struct pmb_entry pmb_entry_list[NR_PMB_ENTRIES];
-static unsigned long pmb_map;
+static DECLARE_BITMAP(pmb_map, NR_PMB_ENTRIES);
-static inline unsigned long mk_pmb_entry(unsigned int entry)
+static __always_inline unsigned long mk_pmb_entry(unsigned int entry)
{
return (entry & PMB_E_MASK) << PMB_E_SHIFT;
}
-static inline unsigned long mk_pmb_addr(unsigned int entry)
+static __always_inline unsigned long mk_pmb_addr(unsigned int entry)
{
return mk_pmb_entry(entry) | PMB_ADDR;
}
-static inline unsigned long mk_pmb_data(unsigned int entry)
+static __always_inline unsigned long mk_pmb_data(unsigned int entry)
{
return mk_pmb_entry(entry) | PMB_DATA;
}
@@ -56,12 +55,12 @@ static int pmb_alloc_entry(void)
unsigned int pos;
repeat:
- pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES);
+ pos = find_first_zero_bit(pmb_map, NR_PMB_ENTRIES);
if (unlikely(pos > NR_PMB_ENTRIES))
return -ENOSPC;
- if (test_and_set_bit(pos, &pmb_map))
+ if (test_and_set_bit(pos, pmb_map))
goto repeat;
return pos;
@@ -78,7 +77,7 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
if (pos < 0)
return ERR_PTR(pos);
} else {
- if (test_and_set_bit(entry, &pmb_map))
+ if (test_and_set_bit(entry, pmb_map))
return ERR_PTR(-ENOSPC);
pos = entry;
}
@@ -104,16 +103,17 @@ static void pmb_free(struct pmb_entry *pmbe)
pmbe->flags = 0;
pmbe->entry = 0;
- clear_bit(pos, &pmb_map);
+ clear_bit(pos, pmb_map);
}
/*
- * Must be in P2 for __set_pmb_entry()
+ * Must be run uncached.
*/
-static void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
- unsigned long flags, int pos)
+static void set_pmb_entry(struct pmb_entry *pmbe)
{
- __raw_writel(vpn | PMB_V, mk_pmb_addr(pos));
+ jump_to_uncached();
+
+ __raw_writel(pmbe->vpn | PMB_V, mk_pmb_addr(pmbe->entry));
#ifdef CONFIG_CACHE_WRITETHROUGH
/*
@@ -121,17 +121,12 @@ static void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
* invalid, so care must be taken to manually adjust cacheable
* translations.
*/
- if (likely(flags & PMB_C))
- flags |= PMB_WT;
+ if (likely(pmbe->flags & PMB_C))
+ pmbe->flags |= PMB_WT;
#endif
- __raw_writel(ppn | flags | PMB_V, mk_pmb_data(pos));
-}
+ __raw_writel(pmbe->ppn | pmbe->flags | PMB_V, mk_pmb_data(pmbe->entry));
-static void set_pmb_entry(struct pmb_entry *pmbe)
-{
- jump_to_uncached();
- __set_pmb_entry(pmbe->vpn, pmbe->ppn, pmbe->flags, pmbe->entry);
back_to_cached();
}
@@ -140,9 +135,6 @@ static void clear_pmb_entry(struct pmb_entry *pmbe)
unsigned int entry = pmbe->entry;
unsigned long addr;
- if (unlikely(entry >= NR_PMB_ENTRIES))
- return;
-
jump_to_uncached();
/* Clear V-bit */
@@ -155,15 +147,14 @@ static void clear_pmb_entry(struct pmb_entry *pmbe)
back_to_cached();
}
-
static struct {
unsigned long size;
int flag;
} pmb_sizes[] = {
- { .size = 0x20000000, .flag = PMB_SZ_512M, },
- { .size = 0x08000000, .flag = PMB_SZ_128M, },
- { .size = 0x04000000, .flag = PMB_SZ_64M, },
- { .size = 0x01000000, .flag = PMB_SZ_16M, },
+ { .size = SZ_512M, .flag = PMB_SZ_512M, },
+ { .size = SZ_128M, .flag = PMB_SZ_128M, },
+ { .size = SZ_64M, .flag = PMB_SZ_64M, },
+ { .size = SZ_16M, .flag = PMB_SZ_16M, },
};
long pmb_remap(unsigned long vaddr, unsigned long phys,
@@ -230,34 +221,36 @@ again:
return wanted - size;
out:
- if (pmbp)
- __pmb_unmap(pmbp);
+ pmb_unmap_entry(pmbp);
return err;
}
void pmb_unmap(unsigned long addr)
{
- struct pmb_entry *pmbe = NULL;
+ struct pmb_entry *pmbe;
int i;
for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
- if (test_bit(i, &pmb_map)) {
+ if (test_bit(i, pmb_map)) {
pmbe = &pmb_entry_list[i];
- if (pmbe->vpn == addr)
+ if (pmbe->vpn == addr) {
+ pmb_unmap_entry(pmbe);
break;
+ }
}
}
+}
+static void pmb_unmap_entry(struct pmb_entry *pmbe)
+{
if (unlikely(!pmbe))
return;
- __pmb_unmap(pmbe);
-}
-
-static void __pmb_unmap(struct pmb_entry *pmbe)
-{
- BUG_ON(!test_bit(pmbe->entry, &pmb_map));
+ if (!test_bit(pmbe->entry, pmb_map)) {
+ WARN_ON(1);
+ return;
+ }
do {
struct pmb_entry *pmblink = pmbe;
@@ -326,7 +319,7 @@ static int pmb_synchronize_mappings(void)
* jumping between the cached and uncached mappings and tearing
* down alternating mappings while executing from the other.
*/
- for (i = 0; i < PMB_ENTRY_MAX; i++) {
+ for (i = 0; i < NR_PMB_ENTRIES; i++) {
unsigned long addr, data;
unsigned long addr_val, data_val;
unsigned long ppn, vpn, flags;
@@ -494,7 +487,7 @@ static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state)
prev_state.event == PM_EVENT_FREEZE) {
struct pmb_entry *pmbe;
for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
- if (test_bit(i, &pmb_map)) {
+ if (test_bit(i, pmb_map)) {
pmbe = &pmb_entry_list[i];
set_pmb_entry(pmbe);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 20:46:23 +0000