summaryrefslogtreecommitdiffstats
path: root/arch/sh/mm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/mm')
-rw-r--r--arch/sh/mm/Kconfig4
-rw-r--r--arch/sh/mm/Makefile3
-rw-r--r--arch/sh/mm/asids-debugfs.c2
-rw-r--r--arch/sh/mm/cache-debugfs.c10
-rw-r--r--arch/sh/mm/consistent.c3
-rw-r--r--arch/sh/mm/init.c52
-rw-r--r--arch/sh/mm/nommu.c4
-rw-r--r--arch/sh/mm/pmb.c35
-rw-r--r--arch/sh/mm/sram.c34
-rw-r--r--arch/sh/mm/tlb-debugfs.c11
-rw-r--r--arch/sh/mm/tlbflush_32.c16
-rw-r--r--arch/sh/mm/tlbflush_64.c5
12 files changed, 126 insertions, 53 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 1445ca6257d..09370392aff 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -168,6 +168,10 @@ config IOREMAP_FIXED
config UNCACHED_MAPPING
bool
+config HAVE_SRAM_POOL
+ bool
+ select GENERIC_ALLOCATOR
+
choice
prompt "Kernel page size"
default PAGE_SIZE_4KB
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index 53f7c684afb..ab89ea4f941 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_PMB) += pmb.o
obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_IOREMAP_FIXED) += ioremap_fixed.o
obj-$(CONFIG_UNCACHED_MAPPING) += uncached.o
+obj-$(CONFIG_HAVE_SRAM_POOL) += sram.o
# Special flags for fault_64.o. This puts restrictions on the number of
# caller-save registers that the compiler can target when building this file.
@@ -66,4 +67,4 @@ CFLAGS_fault_64.o += -ffixed-r7 \
-ffixed-r60 -ffixed-r61 -ffixed-r62 \
-fomit-frame-pointer
-EXTRA_CFLAGS += -Werror
+ccflags-y := -Werror
diff --git a/arch/sh/mm/asids-debugfs.c b/arch/sh/mm/asids-debugfs.c
index cd8c3bf39b5..74c03ecc487 100644
--- a/arch/sh/mm/asids-debugfs.c
+++ b/arch/sh/mm/asids-debugfs.c
@@ -63,7 +63,7 @@ static int __init asids_debugfs_init(void)
{
struct dentry *asids_dentry;
- asids_dentry = debugfs_create_file("asids", S_IRUSR, sh_debugfs_root,
+ asids_dentry = debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir,
NULL, &asids_debugfs_fops);
if (!asids_dentry)
return -ENOMEM;
diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c
index 690ed010d00..52411462c40 100644
--- a/arch/sh/mm/cache-debugfs.c
+++ b/arch/sh/mm/cache-debugfs.c
@@ -126,25 +126,19 @@ static int __init cache_debugfs_init(void)
{
struct dentry *dcache_dentry, *icache_dentry;
- dcache_dentry = debugfs_create_file("dcache", S_IRUSR, sh_debugfs_root,
+ dcache_dentry = debugfs_create_file("dcache", S_IRUSR, arch_debugfs_dir,
(unsigned int *)CACHE_TYPE_DCACHE,
&cache_debugfs_fops);
if (!dcache_dentry)
return -ENOMEM;
- if (IS_ERR(dcache_dentry))
- return PTR_ERR(dcache_dentry);
- icache_dentry = debugfs_create_file("icache", S_IRUSR, sh_debugfs_root,
+ icache_dentry = debugfs_create_file("icache", S_IRUSR, arch_debugfs_dir,
(unsigned int *)CACHE_TYPE_ICACHE,
&cache_debugfs_fops);
if (!icache_dentry) {
debugfs_remove(dcache_dentry);
return -ENOMEM;
}
- if (IS_ERR(icache_dentry)) {
- debugfs_remove(dcache_dentry);
- return PTR_ERR(icache_dentry);
- }
return 0;
}
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index c86a0854025..03879328699 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -38,11 +38,12 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size,
void *ret, *ret_nocache;
int order = get_order(size);
+ gfp |= __GFP_ZERO;
+
ret = (void *)__get_free_pages(gfp, order);
if (!ret)
return NULL;
- memset(ret, 0, size);
/*
* Pages from the page allocator may have data present in
* cache. So flush the cache before using uncached memory.
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 552bea5113f..3385b28acaa 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -47,7 +47,6 @@ static pte_t *__get_pte_phys(unsigned long addr)
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
pgd = pgd_offset_k(addr);
if (pgd_none(*pgd)) {
@@ -67,8 +66,7 @@ static pte_t *__get_pte_phys(unsigned long addr)
return NULL;
}
- pte = pte_offset_kernel(pmd, addr);
- return pte;
+ return pte_offset_kernel(pmd, addr);
}
static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
@@ -125,13 +123,45 @@ void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
clear_pte_phys(address, prot);
}
+static pmd_t * __init one_md_table_init(pud_t *pud)
+{
+ if (pud_none(*pud)) {
+ pmd_t *pmd;
+
+ pmd = alloc_bootmem_pages(PAGE_SIZE);
+ pud_populate(&init_mm, pud, pmd);
+ BUG_ON(pmd != pmd_offset(pud, 0));
+ }
+
+ return pmd_offset(pud, 0);
+}
+
+static pte_t * __init one_page_table_init(pmd_t *pmd)
+{
+ if (pmd_none(*pmd)) {
+ pte_t *pte;
+
+ pte = alloc_bootmem_pages(PAGE_SIZE);
+ pmd_populate_kernel(&init_mm, pmd, pte);
+ BUG_ON(pte != pte_offset_kernel(pmd, 0));
+ }
+
+ return pte_offset_kernel(pmd, 0);
+}
+
+static pte_t * __init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
+ unsigned long vaddr, pte_t *lastpte)
+{
+ return pte;
+}
+
void __init page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
+ pte_t *pte = NULL;
int i, j, k;
unsigned long vaddr;
@@ -144,19 +174,13 @@ void __init page_table_range_init(unsigned long start, unsigned long end,
for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
pud = (pud_t *)pgd;
for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
-#ifdef __PAGETABLE_PMD_FOLDED
- pmd = (pmd_t *)pud;
-#else
- pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
- pud_populate(&init_mm, pud, pmd);
+ pmd = one_md_table_init(pud);
+#ifndef __PAGETABLE_PMD_FOLDED
pmd += k;
#endif
for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
- if (pmd_none(*pmd)) {
- pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
- pmd_populate_kernel(&init_mm, pmd, pte);
- BUG_ON(pte != pte_offset_kernel(pmd, 0));
- }
+ pte = page_table_kmap_check(one_page_table_init(pmd),
+ pmd, vaddr, pte);
vaddr += PMD_SIZE;
}
k = 0;
diff --git a/arch/sh/mm/nommu.c b/arch/sh/mm/nommu.c
index 7694f50c903..36312d254fa 100644
--- a/arch/sh/mm/nommu.c
+++ b/arch/sh/mm/nommu.c
@@ -67,6 +67,10 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
BUG();
}
+void __flush_tlb_global(void)
+{
+}
+
void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
}
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 6379091a164..b20b1b3eee4 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -40,7 +40,7 @@ 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
@@ -265,7 +265,7 @@ 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;
@@ -327,9 +327,9 @@ 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 */
@@ -368,7 +368,7 @@ 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;
@@ -383,9 +383,10 @@ 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;
@@ -398,7 +399,7 @@ 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);
@@ -627,15 +628,14 @@ 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,
@@ -644,13 +644,12 @@ 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);
}
}
@@ -757,7 +756,7 @@ 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;
@@ -767,7 +766,7 @@ static void __init pmb_resize(void)
__set_pmb_entry(pmbe);
- spin_unlock_irqrestore(&pmbe->lock, flags);
+ raw_spin_unlock_irqrestore(&pmbe->lock, flags);
}
read_unlock(&pmb_rwlock);
@@ -866,11 +865,9 @@ 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;
}
diff --git a/arch/sh/mm/sram.c b/arch/sh/mm/sram.c
new file mode 100644
index 00000000000..bc156ec4545
--- /dev/null
+++ b/arch/sh/mm/sram.c
@@ -0,0 +1,34 @@
+/*
+ * SRAM pool for tiny memories not otherwise managed.
+ *
+ * Copyright (C) 2010 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/sram.h>
+
+/*
+ * This provides a standard SRAM pool for tiny memories that can be
+ * added either by the CPU or the platform code. Typical SRAM sizes
+ * to be inserted in to the pool will generally be less than the page
+ * size, with anything more reasonably sized handled as a NUMA memory
+ * node.
+ */
+struct gen_pool *sram_pool;
+
+static int __init sram_pool_init(void)
+{
+ /*
+ * This is a global pool, we don't care about node locality.
+ */
+ sram_pool = gen_pool_create(1, -1);
+ if (unlikely(!sram_pool))
+ return -ENOMEM;
+
+ return 0;
+}
+core_initcall(sram_pool_init);
diff --git a/arch/sh/mm/tlb-debugfs.c b/arch/sh/mm/tlb-debugfs.c
index 229bf75f28d..dea637a0924 100644
--- a/arch/sh/mm/tlb-debugfs.c
+++ b/arch/sh/mm/tlb-debugfs.c
@@ -151,15 +151,13 @@ static int __init tlb_debugfs_init(void)
{
struct dentry *itlb, *utlb;
- itlb = debugfs_create_file("itlb", S_IRUSR, sh_debugfs_root,
+ itlb = debugfs_create_file("itlb", S_IRUSR, arch_debugfs_dir,
(unsigned int *)TLB_TYPE_ITLB,
&tlb_debugfs_fops);
if (unlikely(!itlb))
return -ENOMEM;
- if (IS_ERR(itlb))
- return PTR_ERR(itlb);
- utlb = debugfs_create_file("utlb", S_IRUSR, sh_debugfs_root,
+ utlb = debugfs_create_file("utlb", S_IRUSR, arch_debugfs_dir,
(unsigned int *)TLB_TYPE_UTLB,
&tlb_debugfs_fops);
if (unlikely(!utlb)) {
@@ -167,11 +165,6 @@ static int __init tlb_debugfs_init(void)
return -ENOMEM;
}
- if (IS_ERR(utlb)) {
- debugfs_remove(itlb);
- return PTR_ERR(utlb);
- }
-
return 0;
}
module_init(tlb_debugfs_init);
diff --git a/arch/sh/mm/tlbflush_32.c b/arch/sh/mm/tlbflush_32.c
index 3fbe03ce8fe..a6a20d6de4c 100644
--- a/arch/sh/mm/tlbflush_32.c
+++ b/arch/sh/mm/tlbflush_32.c
@@ -119,3 +119,19 @@ void local_flush_tlb_mm(struct mm_struct *mm)
local_irq_restore(flags);
}
}
+
+void __flush_tlb_global(void)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ /*
+ * This is the most destructive of the TLB flushing options,
+ * and will tear down all of the UTLB/ITLB mappings, including
+ * wired entries.
+ */
+ __raw_writel(__raw_readl(MMUCR) | MMUCR_TI, MMUCR);
+
+ local_irq_restore(flags);
+}
diff --git a/arch/sh/mm/tlbflush_64.c b/arch/sh/mm/tlbflush_64.c
index 03db41cc126..7f5810f5dfd 100644
--- a/arch/sh/mm/tlbflush_64.c
+++ b/arch/sh/mm/tlbflush_64.c
@@ -455,6 +455,11 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
flush_tlb_all();
}
+void __flush_tlb_global(void)
+{
+ flush_tlb_all();
+}
+
void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-30 21:13:46 +0000