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-rw-r--r--arch/sh/mm/Kconfig48
-rw-r--r--arch/sh/mm/Makefile12
-rw-r--r--arch/sh/mm/alignment.c189
-rw-r--r--arch/sh/mm/cache-debugfs.c7
-rw-r--r--arch/sh/mm/cache-sh2.c12
-rw-r--r--arch/sh/mm/cache-sh2a.c20
-rw-r--r--arch/sh/mm/cache-sh3.c6
-rw-r--r--arch/sh/mm/cache-sh4.c27
-rw-r--r--arch/sh/mm/cache-sh7705.c12
-rw-r--r--arch/sh/mm/cache.c13
-rw-r--r--arch/sh/mm/fault_32.c3
-rw-r--r--arch/sh/mm/init.c166
-rw-r--r--arch/sh/mm/ioremap.c (renamed from arch/sh/mm/ioremap_32.c)63
-rw-r--r--arch/sh/mm/ioremap_64.c326
-rw-r--r--arch/sh/mm/ioremap_fixed.c128
-rw-r--r--arch/sh/mm/nommu.c4
-rw-r--r--arch/sh/mm/pgtable.c56
-rw-r--r--arch/sh/mm/pmb.c586
-rw-r--r--arch/sh/mm/tlb-pteaex.c3
-rw-r--r--arch/sh/mm/tlb-sh3.c6
-rw-r--r--arch/sh/mm/tlb-sh4.c13
-rw-r--r--arch/sh/mm/tlb-sh5.c39
-rw-r--r--arch/sh/mm/tlb-urb.c81
-rw-r--r--arch/sh/mm/tlbflush_32.c4
-rw-r--r--arch/sh/mm/tlbflush_64.c2
-rw-r--r--arch/sh/mm/uncached.c34
26 files changed, 1189 insertions, 671 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 986a71b..1445ca6 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -75,52 +75,25 @@ config MEMORY_SIZE
config 29BIT
def_bool !32BIT
depends on SUPERH32
+ select UNCACHED_MAPPING
config 32BIT
bool
default y if CPU_SH5
-config PMB_ENABLE
- bool "Support 32-bit physical addressing through PMB"
- depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
- help
- If you say Y here, physical addressing will be extended to
- 32-bits through the SH-4A PMB. If this is not set, legacy
- 29-bit physical addressing will be used.
-
-choice
- prompt "PMB handling type"
- depends on PMB_ENABLE
- default PMB_FIXED
-
config PMB
- bool "PMB"
+ bool "Support 32-bit physical addressing through PMB"
depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
+ select 32BIT
+ select UNCACHED_MAPPING
help
If you say Y here, physical addressing will be extended to
32-bits through the SH-4A PMB. If this is not set, legacy
29-bit physical addressing will be used.
-config PMB_FIXED
- bool "fixed PMB"
- depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP
- select 32BIT
- help
- If this option is enabled, fixed PMB mappings are inherited
- from the boot loader, and the kernel does not attempt dynamic
- management. This is the closest to legacy 29-bit physical mode,
- and allows systems to support up to 512MiB of system memory.
-
-endchoice
-
config X2TLB
- bool "Enable extended TLB mode"
- depends on (CPU_SHX2 || CPU_SHX3) && MMU && EXPERIMENTAL
- help
- Selecting this option will enable the extended mode of the SH-X2
- TLB. For legacy SH-X behaviour and interoperability, say N. For
- all of the fun new features and a willingless to submit bug reports,
- say Y.
+ def_bool y
+ depends on (CPU_SHX2 || CPU_SHX3) && MMU
config VSYSCALL
bool "Support vsyscall page"
@@ -188,14 +161,19 @@ config ARCH_MEMORY_PROBE
def_bool y
depends on MEMORY_HOTPLUG
+config IOREMAP_FIXED
+ def_bool y
+ depends on X2TLB || SUPERH64
+
+config UNCACHED_MAPPING
+ bool
+
choice
prompt "Kernel page size"
- default PAGE_SIZE_8KB if X2TLB
default PAGE_SIZE_4KB
config PAGE_SIZE_4KB
bool "4kB"
- depends on !MMU || !X2TLB
help
This is the default page size used by all SuperH CPUs.
diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile
index 8a70535..3dc8a8a 100644
--- a/arch/sh/mm/Makefile
+++ b/arch/sh/mm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the Linux SuperH-specific parts of the memory manager.
#
-obj-y := cache.o init.o consistent.o mmap.o
+obj-y := alignment.o cache.o init.o consistent.o mmap.o
cacheops-$(CONFIG_CPU_SH2) := cache-sh2.o
cacheops-$(CONFIG_CPU_SH2A) := cache-sh2a.o
@@ -15,7 +15,7 @@ obj-y += $(cacheops-y)
mmu-y := nommu.o extable_32.o
mmu-$(CONFIG_MMU) := extable_$(BITS).o fault_$(BITS).o \
- ioremap_$(BITS).o kmap.o tlbflush_$(BITS).o
+ ioremap.o kmap.o pgtable.o tlbflush_$(BITS).o
obj-y += $(mmu-y)
obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
@@ -26,15 +26,17 @@ endif
ifdef CONFIG_MMU
tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o
-tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o
+tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o tlb-urb.o
tlb-$(CONFIG_CPU_SH5) := tlb-sh5.o
-tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o
+tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o tlb-urb.o
obj-y += $(tlb-y)
endif
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PMB_ENABLE) += pmb.o
+obj-$(CONFIG_PMB) += pmb.o
obj-$(CONFIG_NUMA) += numa.o
+obj-$(CONFIG_IOREMAP_FIXED) += ioremap_fixed.o
+obj-$(CONFIG_UNCACHED_MAPPING) += uncached.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.
diff --git a/arch/sh/mm/alignment.c b/arch/sh/mm/alignment.c
new file mode 100644
index 0000000..b2595b8
--- /dev/null
+++ b/arch/sh/mm/alignment.c
@@ -0,0 +1,189 @@
+/*
+ * Alignment access counters and corresponding user-space interfaces.
+ *
+ * Copyright (C) 2009 ST Microelectronics
+ * Copyright (C) 2009 - 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/module.h>
+#include <linux/kernel.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+#include <linux/uaccess.h>
+#include <asm/alignment.h>
+#include <asm/processor.h>
+
+static unsigned long se_user;
+static unsigned long se_sys;
+static unsigned long se_half;
+static unsigned long se_word;
+static unsigned long se_dword;
+static unsigned long se_multi;
+/* bitfield: 1: warn 2: fixup 4: signal -> combinations 2|4 && 1|2|4 are not
+ valid! */
+static int se_usermode = UM_WARN | UM_FIXUP;
+/* 0: no warning 1: print a warning message, disabled by default */
+static int se_kernmode_warn;
+
+core_param(alignment, se_usermode, int, 0600);
+
+void inc_unaligned_byte_access(void)
+{
+ se_half++;
+}
+
+void inc_unaligned_word_access(void)
+{
+ se_word++;
+}
+
+void inc_unaligned_dword_access(void)
+{
+ se_dword++;
+}
+
+void inc_unaligned_multi_access(void)
+{
+ se_multi++;
+}
+
+void inc_unaligned_user_access(void)
+{
+ se_user++;
+}
+
+void inc_unaligned_kernel_access(void)
+{
+ se_sys++;
+}
+
+/*
+ * This defaults to the global policy which can be set from the command
+ * line, while processes can overload their preferences via prctl().
+ */
+unsigned int unaligned_user_action(void)
+{
+ unsigned int action = se_usermode;
+
+ if (current->thread.flags & SH_THREAD_UAC_SIGBUS) {
+ action &= ~UM_FIXUP;
+ action |= UM_SIGNAL;
+ }
+
+ if (current->thread.flags & SH_THREAD_UAC_NOPRINT)
+ action &= ~UM_WARN;
+
+ return action;
+}
+
+int get_unalign_ctl(struct task_struct *tsk, unsigned long addr)
+{
+ return put_user(tsk->thread.flags & SH_THREAD_UAC_MASK,
+ (unsigned int __user *)addr);
+}
+
+int set_unalign_ctl(struct task_struct *tsk, unsigned int val)
+{
+ tsk->thread.flags = (tsk->thread.flags & ~SH_THREAD_UAC_MASK) |
+ (val & SH_THREAD_UAC_MASK);
+ return 0;
+}
+
+void unaligned_fixups_notify(struct task_struct *tsk, insn_size_t insn,
+ struct pt_regs *regs)
+{
+ if (user_mode(regs) && (se_usermode & UM_WARN) && printk_ratelimit())
+ pr_notice("Fixing up unaligned userspace access "
+ "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
+ tsk->comm, task_pid_nr(tsk),
+ (void *)instruction_pointer(regs), insn);
+ else if (se_kernmode_warn && printk_ratelimit())
+ pr_notice("Fixing up unaligned kernel access "
+ "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
+ tsk->comm, task_pid_nr(tsk),
+ (void *)instruction_pointer(regs), insn);
+}
+
+static const char *se_usermode_action[] = {
+ "ignored",
+ "warn",
+ "fixup",
+ "fixup+warn",
+ "signal",
+ "signal+warn"
+};
+
+static int alignment_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "User:\t\t%lu\n", se_user);
+ seq_printf(m, "System:\t\t%lu\n", se_sys);
+ seq_printf(m, "Half:\t\t%lu\n", se_half);
+ seq_printf(m, "Word:\t\t%lu\n", se_word);
+ seq_printf(m, "DWord:\t\t%lu\n", se_dword);
+ seq_printf(m, "Multi:\t\t%lu\n", se_multi);
+ seq_printf(m, "User faults:\t%i (%s)\n", se_usermode,
+ se_usermode_action[se_usermode]);
+ seq_printf(m, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
+ se_kernmode_warn ? "+warn" : "");
+ return 0;
+}
+
+static int alignment_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, alignment_proc_show, NULL);
+}
+
+static ssize_t alignment_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ int *data = PDE(file->f_path.dentry->d_inode)->data;
+ char mode;
+
+ if (count > 0) {
+ if (get_user(mode, buffer))
+ return -EFAULT;
+ if (mode >= '0' && mode <= '5')
+ *data = mode - '0';
+ }
+ return count;
+}
+
+static const struct file_operations alignment_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = alignment_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = alignment_proc_write,
+};
+
+/*
+ * This needs to be done after sysctl_init, otherwise sys/ will be
+ * overwritten. Actually, this shouldn't be in sys/ at all since
+ * it isn't a sysctl, and it doesn't contain sysctl information.
+ * We now locate it in /proc/cpu/alignment instead.
+ */
+static int __init alignment_init(void)
+{
+ struct proc_dir_entry *dir, *res;
+
+ dir = proc_mkdir("cpu", NULL);
+ if (!dir)
+ return -ENOMEM;
+
+ res = proc_create_data("alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_usermode);
+ if (!res)
+ return -ENOMEM;
+
+ res = proc_create_data("kernel_alignment", S_IWUSR | S_IRUGO, dir,
+ &alignment_proc_fops, &se_kernmode_warn);
+ if (!res)
+ return -ENOMEM;
+
+ return 0;
+}
+fs_initcall(alignment_init);
diff --git a/arch/sh/mm/cache-debugfs.c b/arch/sh/mm/cache-debugfs.c
index 5ba067b..690ed01 100644
--- a/arch/sh/mm/cache-debugfs.c
+++ b/arch/sh/mm/cache-debugfs.c
@@ -22,8 +22,7 @@ enum cache_type {
CACHE_TYPE_UNIFIED,
};
-static int __uses_jump_to_uncached cache_seq_show(struct seq_file *file,
- void *iter)
+static int cache_seq_show(struct seq_file *file, void *iter)
{
unsigned int cache_type = (unsigned int)file->private;
struct cache_info *cache;
@@ -37,7 +36,7 @@ static int __uses_jump_to_uncached cache_seq_show(struct seq_file *file,
*/
jump_to_uncached();
- ccr = ctrl_inl(CCR);
+ ccr = __raw_readl(CCR);
if ((ccr & CCR_CACHE_ENABLE) == 0) {
back_to_cached();
@@ -90,7 +89,7 @@ static int __uses_jump_to_uncached cache_seq_show(struct seq_file *file,
for (addr = addrstart, line = 0;
addr < addrstart + waysize;
addr += cache->linesz, line++) {
- unsigned long data = ctrl_inl(addr);
+ unsigned long data = __raw_readl(addr);
/* Check the V bit, ignore invalid cachelines */
if ((data & 1) == 0)
diff --git a/arch/sh/mm/cache-sh2.c b/arch/sh/mm/cache-sh2.c
index 699a71f..defcf71 100644
--- a/arch/sh/mm/cache-sh2.c
+++ b/arch/sh/mm/cache-sh2.c
@@ -28,10 +28,10 @@ static void sh2__flush_wback_region(void *start, int size)
unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0);
int way;
for (way = 0; way < 4; way++) {
- unsigned long data = ctrl_inl(addr | (way << 12));
+ unsigned long data = __raw_readl(addr | (way << 12));
if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
data &= ~SH_CACHE_UPDATED;
- ctrl_outl(data, addr | (way << 12));
+ __raw_writel(data, addr | (way << 12));
}
}
}
@@ -47,7 +47,7 @@ static void sh2__flush_purge_region(void *start, int size)
& ~(L1_CACHE_BYTES-1);
for (v = begin; v < end; v+=L1_CACHE_BYTES)
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
}
@@ -63,9 +63,9 @@ static void sh2__flush_invalidate_region(void *start, int size)
local_irq_save(flags);
jump_to_uncached();
- ccr = ctrl_inl(CCR);
+ ccr = __raw_readl(CCR);
ccr |= CCR_CACHE_INVALIDATE;
- ctrl_outl(ccr, CCR);
+ __raw_writel(ccr, CCR);
back_to_cached();
local_irq_restore(flags);
@@ -78,7 +78,7 @@ static void sh2__flush_invalidate_region(void *start, int size)
& ~(L1_CACHE_BYTES-1);
for (v = begin; v < end; v+=L1_CACHE_BYTES)
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
#endif
}
diff --git a/arch/sh/mm/cache-sh2a.c b/arch/sh/mm/cache-sh2a.c
index 975899d..1f51225 100644
--- a/arch/sh/mm/cache-sh2a.c
+++ b/arch/sh/mm/cache-sh2a.c
@@ -32,10 +32,10 @@ static void sh2a__flush_wback_region(void *start, int size)
unsigned long addr = CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0);
int way;
for (way = 0; way < 4; way++) {
- unsigned long data = ctrl_inl(addr | (way << 11));
+ unsigned long data = __raw_readl(addr | (way << 11));
if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
data &= ~SH_CACHE_UPDATED;
- ctrl_outl(data, addr | (way << 11));
+ __raw_writel(data, addr | (way << 11));
}
}
}
@@ -58,7 +58,7 @@ static void sh2a__flush_purge_region(void *start, int size)
jump_to_uncached();
for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
}
back_to_cached();
@@ -78,17 +78,17 @@ static void sh2a__flush_invalidate_region(void *start, int size)
jump_to_uncached();
#ifdef CONFIG_CACHE_WRITEBACK
- ctrl_outl(ctrl_inl(CCR) | CCR_OCACHE_INVALIDATE, CCR);
+ __raw_writel(__raw_readl(CCR) | CCR_OCACHE_INVALIDATE, CCR);
/* I-cache invalidate */
for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
}
#else
for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_IC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
- ctrl_outl((v & CACHE_PHYSADDR_MASK),
+ __raw_writel((v & CACHE_PHYSADDR_MASK),
CACHE_OC_ADDRESS_ARRAY | (v & 0x000007f0) | 0x00000008);
}
#endif
@@ -115,14 +115,14 @@ static void sh2a_flush_icache_range(void *args)
int way;
/* O-Cache writeback */
for (way = 0; way < 4; way++) {
- unsigned long data = ctrl_inl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
+ unsigned long data = __raw_readl(CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
if ((data & CACHE_PHYSADDR_MASK) == (v & CACHE_PHYSADDR_MASK)) {
data &= ~SH_CACHE_UPDATED;
- ctrl_outl(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
+ __raw_writel(data, CACHE_OC_ADDRESS_ARRAY | addr | (way << 11));
}
}
/* I-Cache invalidate */
- ctrl_outl(addr,
+ __raw_writel(addr,
CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
}
diff --git a/arch/sh/mm/cache-sh3.c b/arch/sh/mm/cache-sh3.c
index faef80c..e37523f 100644
--- a/arch/sh/mm/cache-sh3.c
+++ b/arch/sh/mm/cache-sh3.c
@@ -50,12 +50,12 @@ static void sh3__flush_wback_region(void *start, int size)
p = __pa(v);
addr = addrstart | (v & current_cpu_data.dcache.entry_mask);
local_irq_save(flags);
- data = ctrl_inl(addr);
+ data = __raw_readl(addr);
if ((data & CACHE_PHYSADDR_MASK) ==
(p & CACHE_PHYSADDR_MASK)) {
data &= ~SH_CACHE_UPDATED;
- ctrl_outl(data, addr);
+ __raw_writel(data, addr);
local_irq_restore(flags);
break;
}
@@ -86,7 +86,7 @@ static void sh3__flush_purge_region(void *start, int size)
data = (v & 0xfffffc00); /* _Virtual_ address, ~U, ~V */
addr = CACHE_OC_ADDRESS_ARRAY |
(v & current_cpu_data.dcache.entry_mask) | SH_CACHE_ASSOC;
- ctrl_outl(data, addr);
+ __raw_writel(data, addr);
}
}
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 560ddb6..2cfae81 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -36,7 +36,7 @@ static void __flush_cache_one(unsigned long addr, unsigned long phys,
* Called from kernel/module.c:sys_init_module and routine for a.out format,
* signal handler code and kprobes code
*/
-static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
+static void sh4_flush_icache_range(void *args)
{
struct flusher_data *data = args;
unsigned long start, end;
@@ -109,6 +109,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys)
static void sh4_flush_dcache_page(void *arg)
{
struct page *page = arg;
+ unsigned long addr = (unsigned long)page_address(page);
#ifndef CONFIG_SMP
struct address_space *mapping = page_mapping(page);
@@ -116,22 +117,14 @@ static void sh4_flush_dcache_page(void *arg)
set_bit(PG_dcache_dirty, &page->flags);
else
#endif
- {
- unsigned long phys = page_to_phys(page);
- unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
- int i, n;
-
- /* Loop all the D-cache */
- n = boot_cpu_data.dcache.n_aliases;
- for (i = 0; i < n; i++, addr += PAGE_SIZE)
- flush_cache_one(addr, phys);
- }
+ flush_cache_one(CACHE_OC_ADDRESS_ARRAY |
+ (addr & shm_align_mask), page_to_phys(page));
wmb();
}
/* TODO: Selective icache invalidation through IC address array.. */
-static void __uses_jump_to_uncached flush_icache_all(void)
+static void flush_icache_all(void)
{
unsigned long flags, ccr;
@@ -139,9 +132,9 @@ static void __uses_jump_to_uncached flush_icache_all(void)
jump_to_uncached();
/* Flush I-cache */
- ccr = ctrl_inl(CCR);
+ ccr = __raw_readl(CCR);
ccr |= CCR_CACHE_ICI;
- ctrl_outl(ccr, CCR);
+ __raw_writel(ccr, CCR);
/*
* back_to_cached() will take care of the barrier for us, don't add
@@ -384,9 +377,9 @@ extern void __weak sh4__flush_region_init(void);
void __init sh4_cache_init(void)
{
printk("PVR=%08x CVR=%08x PRR=%08x\n",
- ctrl_inl(CCN_PVR),
- ctrl_inl(CCN_CVR),
- ctrl_inl(CCN_PRR));
+ __raw_readl(CCN_PVR),
+ __raw_readl(CCN_CVR),
+ __raw_readl(CCN_PRR));
local_flush_icache_range = sh4_flush_icache_range;
local_flush_dcache_page = sh4_flush_dcache_page;
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index f527fb7..f498da1 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -48,10 +48,10 @@ static inline void cache_wback_all(void)
unsigned long data;
int v = SH_CACHE_UPDATED | SH_CACHE_VALID;
- data = ctrl_inl(addr);
+ data = __raw_readl(addr);
if ((data & v) == v)
- ctrl_outl(data & ~v, addr);
+ __raw_writel(data & ~v, addr);
}
@@ -78,7 +78,7 @@ static void sh7705_flush_icache_range(void *args)
/*
* Writeback&Invalidate the D-cache of the page
*/
-static void __uses_jump_to_uncached __flush_dcache_page(unsigned long phys)
+static void __flush_dcache_page(unsigned long phys)
{
unsigned long ways, waysize, addrstart;
unsigned long flags;
@@ -115,10 +115,10 @@ static void __uses_jump_to_uncached __flush_dcache_page(unsigned long phys)
addr += current_cpu_data.dcache.linesz) {
unsigned long data;
- data = ctrl_inl(addr) & (0x1ffffC00 | SH_CACHE_VALID);
+ data = __raw_readl(addr) & (0x1ffffC00 | SH_CACHE_VALID);
if (data == phys) {
data &= ~(SH_CACHE_VALID | SH_CACHE_UPDATED);
- ctrl_outl(data, addr);
+ __raw_writel(data, addr);
}
}
@@ -144,7 +144,7 @@ static void sh7705_flush_dcache_page(void *arg)
__flush_dcache_page(__pa(page_address(page)));
}
-static void __uses_jump_to_uncached sh7705_flush_cache_all(void *args)
+static void sh7705_flush_cache_all(void *args)
{
unsigned long flags;
diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c
index b8607fa..0f4095d 100644
--- a/arch/sh/mm/cache.c
+++ b/arch/sh/mm/cache.c
@@ -2,7 +2,7 @@
* arch/sh/mm/cache.c
*
* Copyright (C) 1999, 2000, 2002 Niibe Yutaka
- * Copyright (C) 2002 - 2009 Paul Mundt
+ * Copyright (C) 2002 - 2010 Paul Mundt
*
* Released under the terms of the GNU GPL v2.0.
*/
@@ -41,8 +41,17 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info,
int wait)
{
preempt_disable();
- smp_call_function(func, info, wait);
+
+ /*
+ * It's possible that this gets called early on when IRQs are
+ * still disabled due to ioremapping by the boot CPU, so don't
+ * even attempt IPIs unless there are other CPUs online.
+ */
+ if (num_online_cpus() > 1)
+ smp_call_function(func, info, wait);
+
func(info);
+
preempt_enable();
}
diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 4753010..28e2283 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -53,6 +53,9 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
if (!pud_present(*pud_k))
return NULL;
+ if (!pud_present(*pud))
+ set_pud(pud, *pud_k);
+
pmd = pmd_offset(pud, address);
pmd_k = pmd_offset(pud_k, address);
if (!pmd_present(*pmd_k))
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 432acd0..68028e8 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -21,25 +21,13 @@
#include <asm/cacheflush.h>
#include <asm/sections.h>
#include <asm/cache.h>
+#include <asm/sizes.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
pgd_t swapper_pg_dir[PTRS_PER_PGD];
-#ifdef CONFIG_SUPERH32
-/*
- * Handle trivial transitions between cached and uncached
- * segments, making use of the 1:1 mapping relationship in
- * 512MB lowmem.
- *
- * This is the offset of the uncached section from its cached alias.
- * Default value only valid in 29 bit mode, in 32bit mode will be
- * overridden in pmb_init.
- */
-unsigned long cached_to_uncached = P2SEG - P1SEG;
-#endif
-
#ifdef CONFIG_MMU
-static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
+static pte_t *__get_pte_phys(unsigned long addr)
{
pgd_t *pgd;
pud_t *pud;
@@ -49,22 +37,30 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
pgd = pgd_offset_k(addr);
if (pgd_none(*pgd)) {
pgd_ERROR(*pgd);
- return;
+ return NULL;
}
pud = pud_alloc(NULL, pgd, addr);
if (unlikely(!pud)) {
pud_ERROR(*pud);
- return;
+ return NULL;
}
pmd = pmd_alloc(NULL, pud, addr);
if (unlikely(!pmd)) {
pmd_ERROR(*pmd);
- return;
+ return NULL;
}
pte = pte_offset_kernel(pmd, addr);
+ return pte;
+}
+
+static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
+{
+ pte_t *pte;
+
+ pte = __get_pte_phys(addr);
if (!pte_none(*pte)) {
pte_ERROR(*pte);
return;
@@ -72,23 +68,24 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot));
local_flush_tlb_one(get_asid(), addr);
+
+ if (pgprot_val(prot) & _PAGE_WIRED)
+ tlb_wire_entry(NULL, addr, *pte);
+}
+
+static void clear_pte_phys(unsigned long addr, pgprot_t prot)
+{
+ pte_t *pte;
+
+ pte = __get_pte_phys(addr);
+
+ if (pgprot_val(prot) & _PAGE_WIRED)
+ tlb_unwire_entry();
+
+ set_pte(pte, pfn_pte(0, __pgprot(0)));
+ local_flush_tlb_one(get_asid(), addr);
}
-/*
- * As a performance optimization, other platforms preserve the fixmap mapping
- * across a context switch, we don't presently do this, but this could be done
- * in a similar fashion as to the wired TLB interface that sh64 uses (by way
- * of the memory mapped UTLB configuration) -- this unfortunately forces us to
- * give up a TLB entry for each mapping we want to preserve. While this may be
- * viable for a small number of fixmaps, it's not particularly useful for
- * everything and needs to be carefully evaluated. (ie, we may want this for
- * the vsyscall page).
- *
- * XXX: Perhaps add a _PAGE_WIRED flag or something similar that we can pass
- * in at __set_fixmap() time to determine the appropriate behavior to follow.
- *
- * -- PFM.
- */
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
unsigned long address = __fix_to_virt(idx);
@@ -101,6 +98,18 @@ void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
set_pte_phys(address, phys, prot);
}
+void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
+{
+ unsigned long address = __fix_to_virt(idx);
+
+ if (idx >= __end_of_fixed_addresses) {
+ BUG();
+ return;
+ }
+
+ clear_pte_phys(address, prot);
+}
+
void __init page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
@@ -120,7 +129,13 @@ 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 += k;
+#endif
for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
if (pmd_none(*pmd)) {
pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
@@ -182,9 +197,6 @@ void __init paging_init(void)
}
free_area_init_nodes(max_zone_pfns);
-
- /* Set up the uncached fixmap */
- set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start));
}
/*
@@ -195,6 +207,8 @@ static void __init iommu_init(void)
no_iommu_init();
}
+unsigned int mem_init_done = 0;
+
void __init mem_init(void)
{
int codesize, datasize, initsize;
@@ -231,6 +245,8 @@ void __init mem_init(void)
memset(empty_zero_page, 0, PAGE_SIZE);
__flush_wback_region(empty_zero_page, PAGE_SIZE);
+ vsyscall_init();
+
codesize = (unsigned long) &_etext - (unsigned long) &_text;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
@@ -243,8 +259,48 @@ void __init mem_init(void)
datasize >> 10,
initsize >> 10);
- /* Initialize the vDSO */
- vsyscall_init();
+ printk(KERN_INFO "virtual kernel memory layout:\n"
+ " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+#ifdef CONFIG_HIGHMEM
+ " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
+#endif
+ " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
+ " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n"
+#ifdef CONFIG_UNCACHED_MAPPING
+ " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n"
+#endif
+ " .init : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ " .data : 0x%08lx - 0x%08lx (%4ld kB)\n"
+ " .text : 0x%08lx - 0x%08lx (%4ld kB)\n",
+ FIXADDR_START, FIXADDR_TOP,
+ (FIXADDR_TOP - FIXADDR_START) >> 10,
+
+#ifdef CONFIG_HIGHMEM
+ PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
+ (LAST_PKMAP*PAGE_SIZE) >> 10,
+#endif
+
+ (unsigned long)VMALLOC_START, VMALLOC_END,
+ (VMALLOC_END - VMALLOC_START) >> 20,
+
+ (unsigned long)memory_start, (unsigned long)high_memory,
+ ((unsigned long)high_memory - (unsigned long)memory_start) >> 20,
+
+#ifdef CONFIG_UNCACHED_MAPPING
+ uncached_start, uncached_end, uncached_size >> 20,
+#endif
+
+ (unsigned long)&__init_begin, (unsigned long)&__init_end,
+ ((unsigned long)&__init_end -
+ (unsigned long)&__init_begin) >> 10,
+
+ (unsigned long)&_etext, (unsigned long)&_edata,
+ ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
+
+ (unsigned long)&_text, (unsigned long)&_etext,
+ ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
+
+ mem_init_done = 1;
}
void free_initmem(void)
@@ -277,35 +333,6 @@ void free_initrd_mem(unsigned long start, unsigned long end)
}
#endif
-#if THREAD_SHIFT < PAGE_SHIFT
-static struct kmem_cache *thread_info_cache;
-
-struct thread_info *alloc_thread_info(struct task_struct *tsk)
-{
- struct thread_info *ti;
-
- ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL);
- if (unlikely(ti == NULL))
- return NULL;
-#ifdef CONFIG_DEBUG_STACK_USAGE
- memset(ti, 0, THREAD_SIZE);
-#endif
- return ti;
-}
-
-void free_thread_info(struct thread_info *ti)
-{
- kmem_cache_free(thread_info_cache, ti);
-}
-
-void thread_info_cache_init(void)
-{
- thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE,
- THREAD_SIZE, 0, NULL);
- BUG_ON(thread_info_cache == NULL);
-}
-#endif /* THREAD_SHIFT < PAGE_SHIFT */
-
#ifdef CONFIG_MEMORY_HOTPLUG
int arch_add_memory(int nid, u64 start, u64 size)
{
@@ -336,10 +363,3 @@ EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
#endif /* CONFIG_MEMORY_HOTPLUG */
-
-#ifdef CONFIG_PMB
-int __in_29bit_mode(void)
-{
- return !(ctrl_inl(PMB_PASCR) & PASCR_SE);
-}
-#endif /* CONFIG_PMB */
diff --git a/arch/sh/mm/ioremap_32.c b/arch/sh/mm/ioremap.c
index 2141bef..c68d2d7 100644
--- a/arch/sh/mm/ioremap_32.c
+++ b/arch/sh/mm/ioremap.c
@@ -1,13 +1,13 @@
/*
* arch/sh/mm/ioremap.c
*
+ * (C) Copyright 1995 1996 Linus Torvalds
+ * (C) Copyright 2005 - 2010 Paul Mundt
+ *
* Re-map IO memory to kernel address space so that we can access it.
* This is needed for high PCI addresses that aren't mapped in the
* 640k-1MB IO memory area on PC's
*
- * (C) Copyright 1995 1996 Linus Torvalds
- * (C) Copyright 2005, 2006 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.
@@ -33,12 +33,12 @@
* have to convert them into an offset in a page-aligned mapping, but the
* caller shouldn't need to know that small detail.
*/
-void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
- unsigned long flags, void *caller)
+void __iomem * __init_refok
+__ioremap_caller(unsigned long phys_addr, unsigned long size,
+ pgprot_t pgprot, void *caller)
{
struct vm_struct *area;
unsigned long offset, last_addr, addr, orig_addr;
- pgprot_t pgprot;
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
@@ -46,18 +46,6 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
return NULL;
/*
- * If we're in the fixed PCI memory range, mapping through page
- * tables is not only pointless, but also fundamentally broken.
- * Just return the physical address instead.
- *
- * For boards that map a small PCI memory aperture somewhere in
- * P1/P2 space, ioremap() will already do the right thing,
- * and we'll never get this far.
- */
- if (is_pci_memory_fixed_range(phys_addr, size))
- return (void __iomem *)phys_addr;
-
- /*
* Mappings have to be page-aligned
*/
offset = phys_addr & ~PAGE_MASK;
@@ -65,6 +53,12 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
size = PAGE_ALIGN(last_addr+1) - phys_addr;
/*
+ * If we can't yet use the regular approach, go the fixmap route.
+ */
+ if (!mem_init_done)
+ return ioremap_fixed(phys_addr, offset, size, pgprot);
+
+ /*
* Ok, go for it..
*/
area = get_vm_area_caller(size, VM_IOREMAP, caller);
@@ -84,8 +78,9 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
* PMB entries are all pre-faulted.
*/
if (unlikely(phys_addr >= P1SEG)) {
- unsigned long mapped = pmb_remap(addr, phys_addr, size, flags);
+ unsigned long mapped;
+ mapped = pmb_remap(addr, phys_addr, size, pgprot);
if (likely(mapped)) {
addr += mapped;
phys_addr += mapped;
@@ -94,7 +89,6 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
}
#endif
- pgprot = __pgprot(pgprot_val(PAGE_KERNEL_NOCACHE) | flags);
if (likely(size))
if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) {
vunmap((void *)orig_addr);
@@ -105,15 +99,38 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
}
EXPORT_SYMBOL(__ioremap_caller);
+/*
+ * Simple checks for non-translatable mappings.
+ */
+static inline int iomapping_nontranslatable(unsigned long offset)
+{
+#ifdef CONFIG_29BIT
+ /*
+ * In 29-bit mode this includes the fixed P1/P2 areas, as well as
+ * parts of P3.
+ */
+ if (PXSEG(offset) < P3SEG || offset >= P3_ADDR_MAX)
+ return 1;
+#endif
+
+ return 0;
+}
+
void __iounmap(void __iomem *addr)
{
unsigned long vaddr = (unsigned long __force)addr;
- unsigned long seg = PXSEG(vaddr);
struct vm_struct *p;
- if (seg < P3SEG || vaddr >= P3_ADDR_MAX)
+ /*
+ * Nothing to do if there is no translatable mapping.
+ */
+ if (iomapping_nontranslatable(vaddr))
return;
- if (is_pci_memory_fixed_range(vaddr, 0))
+
+ /*
+ * There's no VMA if it's from an early fixed mapping.
+ */
+ if (iounmap_fixed(addr) == 0)
return;
#ifdef CONFIG_PMB
diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c
deleted file mode 100644
index ef43465..0000000
--- a/arch/sh/mm/ioremap_64.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * arch/sh/mm/ioremap_64.c
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- * Copyright (C) 2003 - 2007 Paul Mundt
- *
- * Mostly derived from arch/sh/mm/ioremap.c which, in turn is mostly
- * derived from arch/i386/mm/ioremap.c .
- *
- * (C) Copyright 1995 1996 Linus Torvalds
- *
- * 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/vmalloc.h>
-#include <linux/ioport.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/io.h>
-#include <linux/bootmem.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/addrspace.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-#include <asm/mmu.h>
-
-static struct resource shmedia_iomap = {
- .name = "shmedia_iomap",
- .start = IOBASE_VADDR + PAGE_SIZE,
- .end = IOBASE_END - 1,
-};
-
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
- unsigned long flags);
-static void shmedia_unmapioaddr(unsigned long vaddr);
-static void __iomem *shmedia_ioremap(struct resource *res, u32 pa,
- int sz, unsigned long flags);
-
-/*
- * We have the same problem as the SPARC, so lets have the same comment:
- * Our mini-allocator...
- * Boy this is gross! We need it because we must map I/O for
- * timers and interrupt controller before the kmalloc is available.
- */
-
-#define XNMLN 15
-#define XNRES 10
-
-struct xresource {
- struct resource xres; /* Must be first */
- int xflag; /* 1 == used */
- char xname[XNMLN+1];
-};
-
-static struct xresource xresv[XNRES];
-
-static struct xresource *xres_alloc(void)
-{
- struct xresource *xrp;
- int n;
-
- xrp = xresv;
- for (n = 0; n < XNRES; n++) {
- if (xrp->xflag == 0) {
- xrp->xflag = 1;
- return xrp;
- }
- xrp++;
- }
- return NULL;
-}
-
-static void xres_free(struct xresource *xrp)
-{
- xrp->xflag = 0;
-}
-
-static struct resource *shmedia_find_resource(struct resource *root,
- unsigned long vaddr)
-{
- struct resource *res;
-
- for (res = root->child; res; res = res->sibling)
- if (res->start <= vaddr && res->end >= vaddr)
- return res;
-
- return NULL;
-}
-
-static void __iomem *shmedia_alloc_io(unsigned long phys, unsigned long size,
- const char *name, unsigned long flags)
-{
- struct xresource *xres;
- struct resource *res;
- char *tack;
- int tlen;
-
- if (name == NULL)
- name = "???";
-
- xres = xres_alloc();
- if (xres != 0) {
- tack = xres->xname;
- res = &xres->xres;
- } else {
- printk_once(KERN_NOTICE "%s: done with statics, "
- "switching to kmalloc\n", __func__);
- tlen = strlen(name);
- tack = kmalloc(sizeof(struct resource) + tlen + 1, GFP_KERNEL);
- if (!tack)
- return NULL;
- memset(tack, 0, sizeof(struct resource));
- res = (struct resource *) tack;
- tack += sizeof(struct resource);
- }
-
- strncpy(tack, name, XNMLN);
- tack[XNMLN] = 0;
- res->name = tack;
-
- return shmedia_ioremap(res, phys, size, flags);
-}
-
-static void __iomem *shmedia_ioremap(struct resource *res, u32 pa, int sz,
- unsigned long flags)
-{
- unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);
- unsigned long round_sz = (offset + sz + PAGE_SIZE-1) & PAGE_MASK;
- unsigned long va;
- unsigned int psz;
-
- if (allocate_resource(&shmedia_iomap, res, round_sz,
- shmedia_iomap.start, shmedia_iomap.end,
- PAGE_SIZE, NULL, NULL) != 0) {
- panic("alloc_io_res(%s): cannot occupy\n",
- (res->name != NULL) ? res->name : "???");
- }
-
- va = res->start;
- pa &= PAGE_MASK;
-
- psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
-
- for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) {
- shmedia_mapioaddr(pa, va, flags);
- va += PAGE_SIZE;
- pa += PAGE_SIZE;
- }
-
- return (void __iomem *)(unsigned long)(res->start + offset);
-}
-
-static void shmedia_free_io(struct resource *res)
-{
- unsigned long len = res->end - res->start + 1;
-
- BUG_ON((len & (PAGE_SIZE - 1)) != 0);
-
- while (len) {
- len -= PAGE_SIZE;
- shmedia_unmapioaddr(res->start + len);
- }
-
- release_resource(res);
-}
-
-static __init_refok void *sh64_get_page(void)
-{
- void *page;
-
- if (slab_is_available())
- page = (void *)get_zeroed_page(GFP_KERNEL);
- else
- page = alloc_bootmem_pages(PAGE_SIZE);
-
- if (!page || ((unsigned long)page & ~PAGE_MASK))
- panic("sh64_get_page: Out of memory already?\n");
-
- return page;
-}
-
-static void shmedia_mapioaddr(unsigned long pa, unsigned long va,
- unsigned long flags)
-{
- pgd_t *pgdp;
- pud_t *pudp;
- pmd_t *pmdp;
- pte_t *ptep, pte;
- pgprot_t prot;
-
- pr_debug("shmedia_mapiopage pa %08lx va %08lx\n", pa, va);
-
- if (!flags)
- flags = 1; /* 1 = CB0-1 device */
-
- pgdp = pgd_offset_k(va);
- if (pgd_none(*pgdp) || !pgd_present(*pgdp)) {
- pudp = (pud_t *)sh64_get_page();
- set_pgd(pgdp, __pgd((unsigned long)pudp | _KERNPG_TABLE));
- }
-
- pudp = pud_offset(pgdp, va);
- if (pud_none(*pudp) || !pud_present(*pudp)) {
- pmdp = (pmd_t *)sh64_get_page();
- set_pud(pudp, __pud((unsigned long)pmdp | _KERNPG_TABLE));
- }
-
- pmdp = pmd_offset(pudp, va);
- if (pmd_none(*pmdp) || !pmd_present(*pmdp)) {
- ptep = (pte_t *)sh64_get_page();
- set_pmd(pmdp, __pmd((unsigned long)ptep + _PAGE_TABLE));
- }
-
- prot = __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE |
- _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SHARED | flags);
-
- pte = pfn_pte(pa >> PAGE_SHIFT, prot);
- ptep = pte_offset_kernel(pmdp, va);
-
- if (!pte_none(*ptep) &&
- pte_val(*ptep) != pte_val(pte))
- pte_ERROR(*ptep);
-
- set_pte(ptep, pte);
-
- flush_tlb_kernel_range(va, PAGE_SIZE);
-}
-
-static void shmedia_unmapioaddr(unsigned long vaddr)
-{
- pgd_t *pgdp;
- pud_t *pudp;
- pmd_t *pmdp;
- pte_t *ptep;
-
- pgdp = pgd_offset_k(vaddr);
- if (pgd_none(*pgdp) || pgd_bad(*pgdp))
- return;
-
- pudp = pud_offset(pgdp, vaddr);
- if (pud_none(*pudp) || pud_bad(*pudp))
- return;
-
- pmdp = pmd_offset(pudp, vaddr);
- if (pmd_none(*pmdp) || pmd_bad(*pmdp))
- return;
-
- ptep = pte_offset_kernel(pmdp, vaddr);
-
- if (pte_none(*ptep) || !pte_present(*ptep))
- return;
-
- clear_page((void *)ptep);
- pte_clear(&init_mm, vaddr, ptep);
-}
-
-void __iomem *__ioremap_caller(unsigned long offset, unsigned long size,
- unsigned long flags, void *caller)
-{
- char name[14];
-
- sprintf(name, "phys_%08x", (u32)offset);
- return shmedia_alloc_io(offset, size, name, flags);
-}
-EXPORT_SYMBOL(__ioremap_caller);
-
-void __iounmap(void __iomem *virtual)
-{
- unsigned long vaddr = (unsigned long)virtual & PAGE_MASK;
- struct resource *res;
- unsigned int psz;
-
- res = shmedia_find_resource(&shmedia_iomap, vaddr);
- if (!res) {
- printk(KERN_ERR "%s: Failed to free 0x%08lx\n",
- __func__, vaddr);
- return;
- }
-
- psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE;
-
- shmedia_free_io(res);
-
- if ((char *)res >= (char *)xresv &&
- (char *)res < (char *)&xresv[XNRES]) {
- xres_free((struct xresource *)res);
- } else {
- kfree(res);
- }
-}
-EXPORT_SYMBOL(__iounmap);
-
-static int
-ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof,
- void *data)
-{
- char *p = buf, *e = buf + length;
- struct resource *r;
- const char *nm;
-
- for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
- if (p + 32 >= e) /* Better than nothing */
- break;
- nm = r->name;
- if (nm == NULL)
- nm = "???";
-
- p += sprintf(p, "%08lx-%08lx: %s\n",
- (unsigned long)r->start,
- (unsigned long)r->end, nm);
- }
-
- return p-buf;
-}
-
-static int __init register_proc_onchip(void)
-{
- create_proc_read_entry("io_map", 0, 0, ioremap_proc_info,
- &shmedia_iomap);
- return 0;
-}
-late_initcall(register_proc_onchip);
diff --git a/arch/sh/mm/ioremap_fixed.c b/arch/sh/mm/ioremap_fixed.c
new file mode 100644
index 0000000..0b78b1e
--- /dev/null
+++ b/arch/sh/mm/ioremap_fixed.c
@@ -0,0 +1,128 @@
+/*
+ * Re-map IO memory to kernel address space so that we can access it.
+ *
+ * These functions should only be used when it is necessary to map a
+ * physical address space into the kernel address space before ioremap()
+ * can be used, e.g. early in boot before paging_init().
+ *
+ * Copyright (C) 2009 Matt Fleming
+ */
+
+#include <linux/vmalloc.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/io.h>
+#include <linux/bootmem.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <asm/fixmap.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/addrspace.h>
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+#include <asm/mmu.h>
+#include <asm/mmu_context.h>
+
+struct ioremap_map {
+ void __iomem *addr;
+ unsigned long size;
+ unsigned long fixmap_addr;
+};
+
+static struct ioremap_map ioremap_maps[FIX_N_IOREMAPS];
+
+void __init ioremap_fixed_init(void)
+{
+ struct ioremap_map *map;
+ int i;
+
+ for (i = 0; i < FIX_N_IOREMAPS; i++) {
+ map = &ioremap_maps[i];
+ map->fixmap_addr = __fix_to_virt(FIX_IOREMAP_BEGIN + i);
+ }
+}
+
+void __init __iomem *
+ioremap_fixed(resource_size_t phys_addr, unsigned long offset,
+ unsigned long size, pgprot_t prot)
+{
+ enum fixed_addresses idx0, idx;
+ struct ioremap_map *map;
+ unsigned int nrpages;
+ int i, slot;
+
+ slot = -1;
+ for (i = 0; i < FIX_N_IOREMAPS; i++) {
+ map = &ioremap_maps[i];
+ if (!map->addr) {
+ map->size = size;
+ slot = i;
+ break;
+ }
+ }
+
+ if (slot < 0)
+ return NULL;
+
+ /*
+ * Mappings have to fit in the FIX_IOREMAP area.
+ */
+ nrpages = size >> PAGE_SHIFT;
+ if (nrpages > FIX_N_IOREMAPS)
+ return NULL;
+
+ /*
+ * Ok, go for it..
+ */
+ idx0 = FIX_IOREMAP_BEGIN + slot;
+ idx = idx0;
+ while (nrpages > 0) {
+ pgprot_val(prot) |= _PAGE_WIRED;
+ __set_fixmap(idx, phys_addr, prot);
+ phys_addr += PAGE_SIZE;
+ idx++;
+ --nrpages;
+ }
+
+ map->addr = (void __iomem *)(offset + map->fixmap_addr);
+ return map->addr;
+}
+
+int iounmap_fixed(void __iomem *addr)
+{
+ enum fixed_addresses idx;
+ struct ioremap_map *map;
+ unsigned int nrpages;
+ int i, slot;
+
+ slot = -1;
+ for (i = 0; i < FIX_N_IOREMAPS; i++) {
+ map = &ioremap_maps[i];
+ if (map->addr == addr) {
+ slot = i;
+ break;
+ }
+ }
+
+ /*
+ * If we don't match, it's not for us.
+ */
+ if (slot < 0)
+ return -EINVAL;
+
+ nrpages = map->size >> PAGE_SHIFT;
+
+ idx = FIX_IOREMAP_BEGIN + slot + nrpages - 1;
+ while (nrpages > 0) {
+ __clear_fixmap(idx, __pgprot(_PAGE_WIRED));
+ --idx;
+ --nrpages;
+ }
+
+ map->size = 0;
+ map->addr = NULL;
+
+ return 0;
+}
diff --git a/arch/sh/mm/nommu.c b/arch/sh/mm/nommu.c
index ac16c05..7694f50 100644
--- a/arch/sh/mm/nommu.c
+++ b/arch/sh/mm/nommu.c
@@ -94,3 +94,7 @@ void __init page_table_range_init(unsigned long start, unsigned long end,
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
}
+
+void pgtable_cache_init(void)
+{
+}
diff --git a/arch/sh/mm/pgtable.c b/arch/sh/mm/pgtable.c
new file mode 100644
index 0000000..6f21fb1
--- /dev/null
+++ b/arch/sh/mm/pgtable.c
@@ -0,0 +1,56 @@
+#include <linux/mm.h>
+
+#define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO
+
+static struct kmem_cache *pgd_cachep;
+#if PAGETABLE_LEVELS > 2
+static struct kmem_cache *pmd_cachep;
+#endif
+
+void pgd_ctor(void *x)
+{
+ pgd_t *pgd = x;
+
+ memcpy(pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+}
+
+void pgtable_cache_init(void)
+{
+ pgd_cachep = kmem_cache_create("pgd_cache",
+ PTRS_PER_PGD * (1<<PTE_MAGNITUDE),
+ PAGE_SIZE, SLAB_PANIC, pgd_ctor);
+#if PAGETABLE_LEVELS > 2
+ pmd_cachep = kmem_cache_create("pmd_cache",
+ PTRS_PER_PMD * (1<<PTE_MAGNITUDE),
+ PAGE_SIZE, SLAB_PANIC, NULL);
+#endif
+}
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP);
+}
+
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ kmem_cache_free(pgd_cachep, pgd);
+}
+
+#if PAGETABLE_LEVELS > 2
+void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
+{
+ set_pud(pud, __pud((unsigned long)pmd));
+}
+
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP);
+}
+
+void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+ kmem_cache_free(pmd_cachep, pmd);
+}
+#endif /* PAGETABLE_LEVELS > 2 */
diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c
index 280f6a1..198bcff 100644
--- a/arch/sh/mm/pmb.c
+++ b/arch/sh/mm/pmb.c
@@ -3,11 +3,8 @@
*
* Privileged Space Mapping Buffer (PMB) Support.
*
- * Copyright (C) 2005, 2006, 2007 Paul Mundt
- *
- * P1/P2 Section mapping definitions from map32.h, which was:
- *
- * Copyright 2003 (c) Lineo Solutions,Inc.
+ * Copyright (C) 2005 - 2010 Paul Mundt
+ * Copyright (C) 2010 Matt Fleming
*
* 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
@@ -24,47 +21,67 @@
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/rwlock.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
+struct pmb_entry;
+
+struct pmb_entry {
+ unsigned long vpn;
+ unsigned long ppn;
+ unsigned long flags;
+ unsigned long size;
-static void __pmb_unmap(struct pmb_entry *);
+ spinlock_t lock;
+
+ /*
+ * 0 .. NR_PMB_ENTRIES for specific entry selection, or
+ * PMB_NO_ENTRY to search for a free one
+ */
+ int entry;
+ /* Adjacent entry link for contiguous multi-entry mappings */
+ struct pmb_entry *link;
+};
+
+static void pmb_unmap_entry(struct pmb_entry *, int depth);
+
+static DEFINE_RWLOCK(pmb_rwlock);
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;
}
static int pmb_alloc_entry(void)
{
- unsigned int pos;
-
-repeat:
- pos = find_first_zero_bit(&pmb_map, NR_PMB_ENTRIES);
-
- if (unlikely(pos > NR_PMB_ENTRIES))
- return -ENOSPC;
+ int pos;
- if (test_and_set_bit(pos, &pmb_map))
- goto repeat;
+ pos = find_first_zero_bit(pmb_map, NR_PMB_ENTRIES);
+ if (pos >= 0 && pos < NR_PMB_ENTRIES)
+ __set_bit(pos, pmb_map);
+ else
+ pos = -ENOSPC;
return pos;
}
@@ -73,21 +90,34 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
unsigned long flags, int entry)
{
struct pmb_entry *pmbe;
+ unsigned long irqflags;
+ void *ret = NULL;
int pos;
+ write_lock_irqsave(&pmb_rwlock, irqflags);
+
if (entry == PMB_NO_ENTRY) {
pos = pmb_alloc_entry();
- if (pos < 0)
- return ERR_PTR(pos);
+ if (unlikely(pos < 0)) {
+ ret = ERR_PTR(pos);
+ goto out;
+ }
} else {
- if (test_bit(entry, &pmb_map))
- return ERR_PTR(-ENOSPC);
+ if (__test_and_set_bit(entry, pmb_map)) {
+ ret = ERR_PTR(-ENOSPC);
+ goto out;
+ }
+
pos = entry;
}
+ write_unlock_irqrestore(&pmb_rwlock, irqflags);
+
pmbe = &pmb_entry_list[pos];
- if (!pmbe)
- return ERR_PTR(-ENOMEM);
+
+ memset(pmbe, 0, sizeof(struct pmb_entry));
+
+ spin_lock_init(&pmbe->lock);
pmbe->vpn = vpn;
pmbe->ppn = ppn;
@@ -95,101 +125,113 @@ static struct pmb_entry *pmb_alloc(unsigned long vpn, unsigned long ppn,
pmbe->entry = pos;
return pmbe;
+
+out:
+ write_unlock_irqrestore(&pmb_rwlock, irqflags);
+ return ret;
}
static void pmb_free(struct pmb_entry *pmbe)
{
- int pos = pmbe->entry;
-
- pmbe->vpn = 0;
- pmbe->ppn = 0;
- pmbe->flags = 0;
- pmbe->entry = 0;
+ __clear_bit(pmbe->entry, pmb_map);
- clear_bit(pos, &pmb_map);
+ pmbe->entry = PMB_NO_ENTRY;
+ pmbe->link = NULL;
}
/*
- * Must be in P2 for __set_pmb_entry()
+ * Ensure that the PMB entries match our cache configuration.
+ *
+ * When we are in 32-bit address extended mode, CCR.CB becomes
+ * invalid, so care must be taken to manually adjust cacheable
+ * translations.
*/
-static void __set_pmb_entry(unsigned long vpn, unsigned long ppn,
- unsigned long flags, int pos)
+static __always_inline unsigned long pmb_cache_flags(void)
{
- ctrl_outl(vpn | PMB_V, mk_pmb_addr(pos));
+ unsigned long flags = 0;
-#ifdef CONFIG_CACHE_WRITETHROUGH
- /*
- * When we are in 32-bit address extended mode, CCR.CB becomes
- * invalid, so care must be taken to manually adjust cacheable
- * translations.
- */
- if (likely(flags & PMB_C))
- flags |= PMB_WT;
+#if defined(CONFIG_CACHE_WRITETHROUGH)
+ flags |= PMB_C | PMB_WT | PMB_UB;
+#elif defined(CONFIG_CACHE_WRITEBACK)
+ flags |= PMB_C;
#endif
- ctrl_outl(ppn | flags | PMB_V, mk_pmb_data(pos));
+ return flags;
}
-static void __uses_jump_to_uncached set_pmb_entry(struct pmb_entry *pmbe)
+/*
+ * Must be run uncached.
+ */
+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();
+ writel_uncached(pmbe->vpn | PMB_V, mk_pmb_addr(pmbe->entry));
+ writel_uncached(pmbe->ppn | pmbe->flags | PMB_V,
+ mk_pmb_data(pmbe->entry));
}
-static void __uses_jump_to_uncached clear_pmb_entry(struct pmb_entry *pmbe)
+static void __clear_pmb_entry(struct pmb_entry *pmbe)
{
- unsigned int entry = pmbe->entry;
- unsigned long addr;
+ unsigned long addr, data;
+ unsigned long addr_val, data_val;
- if (unlikely(entry >= NR_PMB_ENTRIES))
- return;
+ addr = mk_pmb_addr(pmbe->entry);
+ data = mk_pmb_data(pmbe->entry);
- jump_to_uncached();
+ addr_val = __raw_readl(addr);
+ data_val = __raw_readl(data);
/* Clear V-bit */
- addr = mk_pmb_addr(entry);
- ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr);
+ writel_uncached(addr_val & ~PMB_V, addr);
+ writel_uncached(data_val & ~PMB_V, data);
+}
- addr = mk_pmb_data(entry);
- ctrl_outl(ctrl_inl(addr) & ~PMB_V, addr);
+static void set_pmb_entry(struct pmb_entry *pmbe)
+{
+ unsigned long flags;
- back_to_cached();
+ spin_lock_irqsave(&pmbe->lock, flags);
+ __set_pmb_entry(pmbe);
+ spin_unlock_irqrestore(&pmbe->lock, flags);
}
-
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,
- unsigned long size, unsigned long flags)
+ unsigned long size, pgprot_t prot)
{
struct pmb_entry *pmbp, *pmbe;
unsigned long wanted;
int pmb_flags, i;
long err;
+ u64 flags;
+
+ flags = pgprot_val(prot);
+
+ pmb_flags = PMB_WT | PMB_UB;
/* Convert typical pgprot value to the PMB equivalent */
if (flags & _PAGE_CACHABLE) {
- if (flags & _PAGE_WT)
- pmb_flags = PMB_WT;
- else
- pmb_flags = PMB_C;
- } else
- pmb_flags = PMB_WT | PMB_UB;
+ pmb_flags |= PMB_C;
+
+ if ((flags & _PAGE_WT) == 0)
+ pmb_flags &= ~(PMB_WT | PMB_UB);
+ }
pmbp = NULL;
wanted = size;
again:
for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++) {
+ unsigned long flags;
+
if (size < pmb_sizes[i].size)
continue;
@@ -200,18 +242,25 @@ again:
goto out;
}
- set_pmb_entry(pmbe);
+ spin_lock_irqsave(&pmbe->lock, flags);
+
+ __set_pmb_entry(pmbe);
phys += pmb_sizes[i].size;
vaddr += pmb_sizes[i].size;
size -= pmb_sizes[i].size;
+ pmbe->size = pmb_sizes[i].size;
+
/*
* Link adjacent entries that span multiple PMB entries
* for easier tear-down.
*/
- if (likely(pmbp))
+ if (likely(pmbp)) {
+ spin_lock(&pmbp->lock);
pmbp->link = pmbe;
+ spin_unlock(&pmbp->lock);
+ }
pmbp = pmbe;
@@ -221,16 +270,17 @@ again:
* pmb_sizes[i].size again.
*/
i--;
+
+ spin_unlock_irqrestore(&pmbe->lock, flags);
}
- if (size >= 0x1000000)
+ if (size >= SZ_16M)
goto again;
return wanted - size;
out:
- if (pmbp)
- __pmb_unmap(pmbp);
+ pmb_unmap_entry(pmbp, NR_PMB_ENTRIES);
return err;
}
@@ -240,24 +290,52 @@ void pmb_unmap(unsigned long addr)
struct pmb_entry *pmbe = NULL;
int i;
+ read_lock(&pmb_rwlock);
+
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)
break;
}
}
- if (unlikely(!pmbe))
- return;
+ read_unlock(&pmb_rwlock);
- __pmb_unmap(pmbe);
+ pmb_unmap_entry(pmbe, NR_PMB_ENTRIES);
}
-static void __pmb_unmap(struct pmb_entry *pmbe)
+static bool pmb_can_merge(struct pmb_entry *a, struct pmb_entry *b)
{
- BUG_ON(!test_bit(pmbe->entry, &pmb_map));
+ return (b->vpn == (a->vpn + a->size)) &&
+ (b->ppn == (a->ppn + a->size)) &&
+ (b->flags == a->flags);
+}
+static bool pmb_size_valid(unsigned long size)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
+ if (pmb_sizes[i].size == size)
+ return true;
+
+ return false;
+}
+
+static int pmb_size_to_flags(unsigned long size)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(pmb_sizes); i++)
+ if (pmb_sizes[i].size == size)
+ return pmb_sizes[i].flag;
+
+ return 0;
+}
+
+static void __pmb_unmap_entry(struct pmb_entry *pmbe, int depth)
+{
do {
struct pmb_entry *pmblink = pmbe;
@@ -268,102 +346,312 @@ static void __pmb_unmap(struct pmb_entry *pmbe)
* this entry in pmb_alloc() (even if we haven't filled
* it yet).
*
- * Therefore, calling clear_pmb_entry() is safe as no
+ * Therefore, calling __clear_pmb_entry() is safe as no
* other mapping can be using that slot.
*/
- clear_pmb_entry(pmbe);
+ __clear_pmb_entry(pmbe);
pmbe = pmblink->link;
pmb_free(pmblink);
- } while (pmbe);
+ } while (pmbe && --depth);
+}
+
+static void pmb_unmap_entry(struct pmb_entry *pmbe, int depth)
+{
+ unsigned long flags;
+
+ if (unlikely(!pmbe))
+ return;
+
+ write_lock_irqsave(&pmb_rwlock, flags);
+ __pmb_unmap_entry(pmbe, depth);
+ write_unlock_irqrestore(&pmb_rwlock, flags);
+}
+
+static __always_inline unsigned int pmb_ppn_in_range(unsigned long ppn)
+{
+ return ppn >= __pa(memory_start) && ppn < __pa(memory_end);
}
-#ifdef CONFIG_PMB
-int __uses_jump_to_uncached pmb_init(void)
+static void __init pmb_notify(void)
{
- unsigned int i;
- long size, ret;
+ int i;
- jump_to_uncached();
+ pr_info("PMB: boot mappings:\n");
+
+ read_lock(&pmb_rwlock);
+
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
+ struct pmb_entry *pmbe;
+
+ if (!test_bit(i, pmb_map))
+ continue;
+
+ pmbe = &pmb_entry_list[i];
+
+ pr_info(" 0x%08lx -> 0x%08lx [ %4ldMB %2scached ]\n",
+ pmbe->vpn >> PAGE_SHIFT, pmbe->ppn >> PAGE_SHIFT,
+ pmbe->size >> 20, (pmbe->flags & PMB_C) ? "" : "un");
+ }
+
+ read_unlock(&pmb_rwlock);
+}
+
+/*
+ * Sync our software copy of the PMB mappings with those in hardware. The
+ * mappings in the hardware PMB were either set up by the bootloader or
+ * very early on by the kernel.
+ */
+static void __init pmb_synchronize(void)
+{
+ struct pmb_entry *pmbp = NULL;
+ int i, j;
/*
- * Insert PMB entries for the P1 and P2 areas so that, after
- * we've switched the MMU to 32-bit mode, the semantics of P1
- * and P2 are the same as in 29-bit mode, e.g.
+ * Run through the initial boot mappings, log the established
+ * ones, and blow away anything that falls outside of the valid
+ * PPN range. Specifically, we only care about existing mappings
+ * that impact the cached/uncached sections.
*
- * P1 - provides a cached window onto physical memory
- * P2 - provides an uncached window onto physical memory
+ * Note that touching these can be a bit of a minefield; the boot
+ * loader can establish multi-page mappings with the same caching
+ * attributes, so we need to ensure that we aren't modifying a
+ * mapping that we're presently executing from, or may execute
+ * from in the case of straddling page boundaries.
+ *
+ * In the future we will have to tidy up after the boot loader by
+ * jumping between the cached and uncached mappings and tearing
+ * down alternating mappings while executing from the other.
*/
- size = __MEMORY_START + __MEMORY_SIZE;
+ for (i = 0; i < NR_PMB_ENTRIES; i++) {
+ unsigned long addr, data;
+ unsigned long addr_val, data_val;
+ unsigned long ppn, vpn, flags;
+ unsigned long irqflags;
+ unsigned int size;
+ struct pmb_entry *pmbe;
- ret = pmb_remap(P1SEG, 0x00000000, size, PMB_C);
- BUG_ON(ret != size);
+ addr = mk_pmb_addr(i);
+ data = mk_pmb_data(i);
- ret = pmb_remap(P2SEG, 0x00000000, size, PMB_WT | PMB_UB);
- BUG_ON(ret != size);
+ addr_val = __raw_readl(addr);
+ data_val = __raw_readl(data);
- ctrl_outl(0, PMB_IRMCR);
+ /*
+ * Skip over any bogus entries
+ */
+ if (!(data_val & PMB_V) || !(addr_val & PMB_V))
+ continue;
- /* PMB.SE and UB[7] */
- ctrl_outl(PASCR_SE | (1 << 7), PMB_PASCR);
+ ppn = data_val & PMB_PFN_MASK;
+ vpn = addr_val & PMB_PFN_MASK;
- /* Flush out the TLB */
- i = ctrl_inl(MMUCR);
- i |= MMUCR_TI;
- ctrl_outl(i, MMUCR);
+ /*
+ * Only preserve in-range mappings.
+ */
+ if (!pmb_ppn_in_range(ppn)) {
+ /*
+ * Invalidate anything out of bounds.
+ */
+ writel_uncached(addr_val & ~PMB_V, addr);
+ writel_uncached(data_val & ~PMB_V, data);
+ continue;
+ }
- back_to_cached();
+ /*
+ * Update the caching attributes if necessary
+ */
+ if (data_val & PMB_C) {
+ data_val &= ~PMB_CACHE_MASK;
+ data_val |= pmb_cache_flags();
- return 0;
+ writel_uncached(data_val, data);
+ }
+
+ size = data_val & PMB_SZ_MASK;
+ flags = size | (data_val & PMB_CACHE_MASK);
+
+ pmbe = pmb_alloc(vpn, ppn, flags, i);
+ if (IS_ERR(pmbe)) {
+ WARN_ON_ONCE(1);
+ continue;
+ }
+
+ 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);
+
+ /*
+ * Compare the previous entry against the current one to
+ * see if the entries span a contiguous mapping. If so,
+ * setup the entry links accordingly. Compound mappings
+ * are later coalesced.
+ */
+ if (pmb_can_merge(pmbp, pmbe))
+ pmbp->link = pmbe;
+
+ spin_unlock(&pmbp->lock);
+ }
+
+ pmbp = pmbe;
+
+ spin_unlock_irqrestore(&pmbe->lock, irqflags);
+ }
+}
+
+static void __init pmb_merge(struct pmb_entry *head)
+{
+ unsigned long span, newsize;
+ struct pmb_entry *tail;
+ int i = 1, depth = 0;
+
+ span = newsize = head->size;
+
+ tail = head->link;
+ while (tail) {
+ span += tail->size;
+
+ if (pmb_size_valid(span)) {
+ newsize = span;
+ depth = i;
+ }
+
+ /* This is the end of the line.. */
+ if (!tail->link)
+ break;
+
+ tail = tail->link;
+ i++;
+ }
+
+ /*
+ * The merged page size must be valid.
+ */
+ if (!pmb_size_valid(newsize))
+ return;
+
+ head->flags &= ~PMB_SZ_MASK;
+ head->flags |= pmb_size_to_flags(newsize);
+
+ head->size = newsize;
+
+ __pmb_unmap_entry(head->link, depth);
+ __set_pmb_entry(head);
}
-#else
-int __uses_jump_to_uncached pmb_init(void)
+
+static void __init pmb_coalesce(void)
{
+ unsigned long flags;
int i;
- unsigned long addr, data;
- jump_to_uncached();
+ write_lock_irqsave(&pmb_rwlock, flags);
- for (i = 0; i < PMB_ENTRY_MAX; i++) {
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
struct pmb_entry *pmbe;
- unsigned long vpn, ppn, flags;
- addr = PMB_DATA + (i << PMB_E_SHIFT);
- data = ctrl_inl(addr);
- if (!(data & PMB_V))
+ if (!test_bit(i, pmb_map))
continue;
- if (data & PMB_C) {
-#if defined(CONFIG_CACHE_WRITETHROUGH)
- data |= PMB_WT;
-#elif defined(CONFIG_CACHE_WRITEBACK)
- data &= ~PMB_WT;
-#else
- data &= ~(PMB_C | PMB_WT);
-#endif
- }
- ctrl_outl(data, addr);
+ pmbe = &pmb_entry_list[i];
- ppn = data & PMB_PFN_MASK;
+ /*
+ * We're only interested in compound mappings
+ */
+ if (!pmbe->link)
+ continue;
- flags = data & (PMB_C | PMB_WT | PMB_UB);
- flags |= data & PMB_SZ_MASK;
+ /*
+ * Nothing to do if it already uses the largest possible
+ * page size.
+ */
+ if (pmbe->size == SZ_512M)
+ continue;
- addr = PMB_ADDR + (i << PMB_E_SHIFT);
- data = ctrl_inl(addr);
+ pmb_merge(pmbe);
+ }
- vpn = data & PMB_PFN_MASK;
+ write_unlock_irqrestore(&pmb_rwlock, flags);
+}
- pmbe = pmb_alloc(vpn, ppn, flags, i);
- WARN_ON(IS_ERR(pmbe));
+#ifdef CONFIG_UNCACHED_MAPPING
+static void __init pmb_resize(void)
+{
+ int i;
+
+ /*
+ * If the uncached mapping was constructed by the kernel, it will
+ * already be a reasonable size.
+ */
+ if (uncached_size == SZ_16M)
+ return;
+
+ read_lock(&pmb_rwlock);
+
+ for (i = 0; i < ARRAY_SIZE(pmb_entry_list); i++) {
+ struct pmb_entry *pmbe;
+ unsigned long flags;
+
+ if (!test_bit(i, pmb_map))
+ continue;
+
+ pmbe = &pmb_entry_list[i];
+
+ if (pmbe->vpn != uncached_start)
+ continue;
+
+ /*
+ * Found it, now resize it.
+ */
+ spin_lock_irqsave(&pmbe->lock, flags);
+
+ pmbe->size = SZ_16M;
+ pmbe->flags &= ~PMB_SZ_MASK;
+ pmbe->flags |= pmb_size_to_flags(pmbe->size);
+
+ uncached_resize(pmbe->size);
+
+ __set_pmb_entry(pmbe);
+
+ spin_unlock_irqrestore(&pmbe->lock, flags);
}
- back_to_cached();
+ read_lock(&pmb_rwlock);
+}
+#endif
+
+void __init pmb_init(void)
+{
+ /* Synchronize software state */
+ pmb_synchronize();
- return 0;
+ /* Attempt to combine compound mappings */
+ pmb_coalesce();
+
+#ifdef CONFIG_UNCACHED_MAPPING
+ /* Resize initial mappings, if necessary */
+ pmb_resize();
+#endif
+
+ /* Log them */
+ pmb_notify();
+
+ writel_uncached(0, PMB_IRMCR);
+
+ /* Flush out the TLB */
+ __raw_writel(__raw_readl(MMUCR) | MMUCR_TI, MMUCR);
+ ctrl_barrier();
+}
+
+bool __in_29bit_mode(void)
+{
+ return (__raw_readl(PMB_PASCR) & PASCR_SE) == 0;
}
-#endif /* CONFIG_PMB */
static int pmb_seq_show(struct seq_file *file, void *iter)
{
@@ -378,8 +666,8 @@ static int pmb_seq_show(struct seq_file *file, void *iter)
unsigned int size;
char *sz_str = NULL;
- addr = ctrl_inl(mk_pmb_addr(i));
- data = ctrl_inl(mk_pmb_data(i));
+ addr = __raw_readl(mk_pmb_addr(i));
+ data = __raw_readl(mk_pmb_data(i));
size = data & PMB_SZ_MASK;
sz_str = (size == PMB_SZ_16M) ? " 16MB":
@@ -437,14 +725,21 @@ static int pmb_sysdev_suspend(struct sys_device *dev, pm_message_t state)
if (state.event == PM_EVENT_ON &&
prev_state.event == PM_EVENT_FREEZE) {
struct pmb_entry *pmbe;
+
+ read_lock(&pmb_rwlock);
+
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);
}
}
+
+ read_unlock(&pmb_rwlock);
}
+
prev_state = state;
+
return 0;
}
@@ -462,6 +757,5 @@ static int __init pmb_sysdev_init(void)
{
return sysdev_driver_register(&cpu_sysdev_class, &pmb_sysdev_driver);
}
-
subsys_initcall(pmb_sysdev_init);
#endif
diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c
index 409b7c2..32dc674 100644
--- a/arch/sh/mm/tlb-pteaex.c
+++ b/arch/sh/mm/tlb-pteaex.c
@@ -68,8 +68,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
* in extended mode, the legacy 8-bit ASID field in address array 1 has
* undefined behaviour.
*/
-void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid,
- unsigned long page)
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
jump_to_uncached();
__raw_writel(page, MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT);
diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
index ace8e6d..4f5f7cb 100644
--- a/arch/sh/mm/tlb-sh3.c
+++ b/arch/sh/mm/tlb-sh3.c
@@ -41,14 +41,14 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
/* Set PTEH register */
vpn = (address & MMU_VPN_MASK) | get_asid();
- ctrl_outl(vpn, MMU_PTEH);
+ __raw_writel(vpn, MMU_PTEH);
pteval = pte_val(pte);
/* Set PTEL register */
pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
/* conveniently, we want all the software flags to be 0 anyway */
- ctrl_outl(pteval, MMU_PTEL);
+ __raw_writel(pteval, MMU_PTEL);
/* Load the TLB */
asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
@@ -75,5 +75,5 @@ void local_flush_tlb_one(unsigned long asid, unsigned long page)
}
for (i = 0; i < ways; i++)
- ctrl_outl(data, addr + (i << 8));
+ __raw_writel(data, addr + (i << 8));
}
diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c
index 8cf550e..ccac77f 100644
--- a/arch/sh/mm/tlb-sh4.c
+++ b/arch/sh/mm/tlb-sh4.c
@@ -29,7 +29,7 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
/* Set PTEH register */
vpn = (address & MMU_VPN_MASK) | get_asid();
- ctrl_outl(vpn, MMU_PTEH);
+ __raw_writel(vpn, MMU_PTEH);
pteval = pte.pte_low;
@@ -41,13 +41,13 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
* the protection bits (with the exception of the compat-mode SZ
* and PR bits, which are cleared) being written out in PTEL.
*/
- ctrl_outl(pte.pte_high, MMU_PTEA);
+ __raw_writel(pte.pte_high, MMU_PTEA);
#else
if (cpu_data->flags & CPU_HAS_PTEA) {
/* The last 3 bits and the first one of pteval contains
* the PTEA timing control and space attribute bits
*/
- ctrl_outl(copy_ptea_attributes(pteval), MMU_PTEA);
+ __raw_writel(copy_ptea_attributes(pteval), MMU_PTEA);
}
#endif
@@ -57,15 +57,14 @@ void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
pteval |= _PAGE_WT;
#endif
/* conveniently, we want all the software flags to be 0 anyway */
- ctrl_outl(pteval, MMU_PTEL);
+ __raw_writel(pteval, MMU_PTEL);
/* Load the TLB */
asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
local_irq_restore(flags);
}
-void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid,
- unsigned long page)
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
unsigned long addr, data;
@@ -78,6 +77,6 @@ void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid,
addr = MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT;
data = page | asid; /* VALID bit is off */
jump_to_uncached();
- ctrl_outl(data, addr);
+ __raw_writel(data, addr);
back_to_cached();
}
diff --git a/arch/sh/mm/tlb-sh5.c b/arch/sh/mm/tlb-sh5.c
index fdb64e4..f27dbe1 100644
--- a/arch/sh/mm/tlb-sh5.c
+++ b/arch/sh/mm/tlb-sh5.c
@@ -143,3 +143,42 @@ void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr,
*/
void sh64_teardown_tlb_slot(unsigned long long config_addr)
__attribute__ ((alias("__flush_tlb_slot")));
+
+static int dtlb_entry;
+static unsigned long long dtlb_entries[64];
+
+void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte)
+{
+ unsigned long long entry;
+ unsigned long paddr, flags;
+
+ BUG_ON(dtlb_entry == ARRAY_SIZE(dtlb_entries));
+
+ local_irq_save(flags);
+
+ entry = sh64_get_wired_dtlb_entry();
+ dtlb_entries[dtlb_entry++] = entry;
+
+ paddr = pte_val(pte) & _PAGE_FLAGS_HARDWARE_MASK;
+ paddr &= ~PAGE_MASK;
+
+ sh64_setup_tlb_slot(entry, addr, get_asid(), paddr);
+
+ local_irq_restore(flags);
+}
+
+void tlb_unwire_entry(void)
+{
+ unsigned long long entry;
+ unsigned long flags;
+
+ BUG_ON(!dtlb_entry);
+
+ local_irq_save(flags);
+ entry = dtlb_entries[dtlb_entry--];
+
+ sh64_teardown_tlb_slot(entry);
+ sh64_put_wired_dtlb_entry(entry);
+
+ local_irq_restore(flags);
+}
diff --git a/arch/sh/mm/tlb-urb.c b/arch/sh/mm/tlb-urb.c
new file mode 100644
index 0000000..bb5b909
--- /dev/null
+++ b/arch/sh/mm/tlb-urb.c
@@ -0,0 +1,81 @@
+/*
+ * arch/sh/mm/tlb-urb.c
+ *
+ * TLB entry wiring helpers for URB-equipped parts.
+ *
+ * Copyright (C) 2010 Matt Fleming
+ *
+ * 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/mm.h>
+#include <linux/io.h>
+#include <asm/tlb.h>
+#include <asm/mmu_context.h>
+
+/*
+ * Load the entry for 'addr' into the TLB and wire the entry.
+ */
+void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte)
+{
+ unsigned long status, flags;
+ int urb;
+
+ local_irq_save(flags);
+
+ /* Load the entry into the TLB */
+ __update_tlb(vma, addr, pte);
+
+ /* ... and wire it up. */
+ status = __raw_readl(MMUCR);
+ urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT;
+ status &= ~MMUCR_URB;
+
+ /*
+ * Make sure we're not trying to wire the last TLB entry slot.
+ */
+ BUG_ON(!--urb);
+
+ urb = urb % MMUCR_URB_NENTRIES;
+
+ status |= (urb << MMUCR_URB_SHIFT);
+ __raw_writel(status, MMUCR);
+ ctrl_barrier();
+
+ local_irq_restore(flags);
+}
+
+/*
+ * Unwire the last wired TLB entry.
+ *
+ * It should also be noted that it is not possible to wire and unwire
+ * TLB entries in an arbitrary order. If you wire TLB entry N, followed
+ * by entry N+1, you must unwire entry N+1 first, then entry N. In this
+ * respect, it works like a stack or LIFO queue.
+ */
+void tlb_unwire_entry(void)
+{
+ unsigned long status, flags;
+ int urb;
+
+ local_irq_save(flags);
+
+ status = __raw_readl(MMUCR);
+ urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT;
+ status &= ~MMUCR_URB;
+
+ /*
+ * Make sure we're not trying to unwire a TLB entry when none
+ * have been wired.
+ */
+ BUG_ON(urb++ == MMUCR_URB_NENTRIES);
+
+ urb = urb % MMUCR_URB_NENTRIES;
+
+ status |= (urb << MMUCR_URB_SHIFT);
+ __raw_writel(status, MMUCR);
+ ctrl_barrier();
+
+ local_irq_restore(flags);
+}
diff --git a/arch/sh/mm/tlbflush_32.c b/arch/sh/mm/tlbflush_32.c
index 6f45c1f..004bb3f 100644
--- a/arch/sh/mm/tlbflush_32.c
+++ b/arch/sh/mm/tlbflush_32.c
@@ -132,9 +132,9 @@ void local_flush_tlb_all(void)
* It's same position, bit #2.
*/
local_irq_save(flags);
- status = ctrl_inl(MMUCR);
+ status = __raw_readl(MMUCR);
status |= 0x04;
- ctrl_outl(status, MMUCR);
+ __raw_writel(status, MMUCR);
ctrl_barrier();
local_irq_restore(flags);
}
diff --git a/arch/sh/mm/tlbflush_64.c b/arch/sh/mm/tlbflush_64.c
index de0b0e88..706da1d 100644
--- a/arch/sh/mm/tlbflush_64.c
+++ b/arch/sh/mm/tlbflush_64.c
@@ -36,7 +36,7 @@ extern void die(const char *,struct pt_regs *,long);
static inline void print_prots(pgprot_t prot)
{
- printk("prot is 0x%08lx\n",pgprot_val(prot));
+ printk("prot is 0x%016llx\n",pgprot_val(prot));
printk("%s %s %s %s %s\n",PPROT(_PAGE_SHARED),PPROT(_PAGE_READ),
PPROT(_PAGE_EXECUTE),PPROT(_PAGE_WRITE),PPROT(_PAGE_USER));
diff --git a/arch/sh/mm/uncached.c b/arch/sh/mm/uncached.c
new file mode 100644
index 0000000..cf20a5c
--- /dev/null
+++ b/arch/sh/mm/uncached.c
@@ -0,0 +1,34 @@
+#include <linux/init.h>
+#include <asm/sizes.h>
+#include <asm/page.h>
+
+/*
+ * This is the offset of the uncached section from its cached alias.
+ *
+ * Legacy platforms handle trivial transitions between cached and
+ * uncached segments by making use of the 1:1 mapping relationship in
+ * 512MB lowmem, others via a special uncached mapping.
+ *
+ * Default value only valid in 29 bit mode, in 32bit mode this will be
+ * updated by the early PMB initialization code.
+ */
+unsigned long cached_to_uncached = SZ_512M;
+unsigned long uncached_size = SZ_512M;
+unsigned long uncached_start, uncached_end;
+
+int virt_addr_uncached(unsigned long kaddr)
+{
+ return (kaddr >= uncached_start) && (kaddr < uncached_end);
+}
+
+void __init uncached_init(void)
+{
+ uncached_start = memory_end;
+ uncached_end = uncached_start + uncached_size;
+}
+
+void __init uncached_resize(unsigned long size)
+{
+ uncached_size = size;
+ uncached_end = uncached_start + uncached_size;
+}
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