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-rw-r--r--arch/sh/Kconfig.debug4
-rw-r--r--arch/sh/kernel/process_64.c39
-rw-r--r--arch/sh/mm/Makefile_321
-rw-r--r--arch/sh/mm/Makefile_641
-rw-r--r--arch/sh/mm/asids-debugfs.c79
5 files changed, 81 insertions, 43 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index e6d2c8b..8f0c1fb 100644
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -180,10 +180,6 @@ endmenu
if SUPERH64
-config SH64_PROC_ASIDS
- bool "Debug: report ASIDs through /proc/asids"
- depends on PROC_FS && MMU
-
config SH64_SR_WATCH
bool "Debug: set SR.WATCH to enable hardware watchpoints and trace"
diff --git a/arch/sh/kernel/process_64.c b/arch/sh/kernel/process_64.c
index e9bf254..a7e5f2e 100644
--- a/arch/sh/kernel/process_64.c
+++ b/arch/sh/kernel/process_64.c
@@ -23,7 +23,6 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/module.h>
-#include <linux/proc_fs.h>
#include <linux/io.h>
#include <asm/syscalls.h>
#include <asm/uaccess.h>
@@ -590,41 +589,3 @@ unsigned long get_wchan(struct task_struct *p)
#endif
return pc;
}
-
-/* Provide a /proc/asids file that lists out the
- ASIDs currently associated with the processes. (If the DM.PC register is
- examined through the debug link, this shows ASID + PC. To make use of this,
- the PID->ASID relationship needs to be known. This is primarily for
- debugging.)
- */
-
-#if defined(CONFIG_SH64_PROC_ASIDS)
-static int
-asids_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, void *data)
-{
- int len=0;
- struct task_struct *p;
- read_lock(&tasklist_lock);
- for_each_process(p) {
- int pid = p->pid;
-
- if (!pid)
- continue;
- if (p->mm)
- len += sprintf(buf+len, "%5d : %02lx\n", pid,
- asid_cache(smp_processor_id()));
- else
- len += sprintf(buf+len, "%5d : (none)\n", pid);
- }
- read_unlock(&tasklist_lock);
- *eof = 1;
- return len;
-}
-
-static int __init register_proc_asids(void)
-{
- create_proc_read_entry("asids", 0, NULL, asids_proc_info, NULL);
- return 0;
-}
-__initcall(register_proc_asids);
-#endif
diff --git a/arch/sh/mm/Makefile_32 b/arch/sh/mm/Makefile_32
index f066e76..cb2f3f2 100644
--- a/arch/sh/mm/Makefile_32
+++ b/arch/sh/mm/Makefile_32
@@ -18,6 +18,7 @@ mmu-y := tlb-nommu.o pg-nommu.o
mmu-$(CONFIG_MMU) := fault_32.o tlbflush_32.o ioremap_32.o
obj-y += $(mmu-y)
+obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
ifdef CONFIG_DEBUG_FS
obj-$(CONFIG_CPU_SH4) += cache-debugfs.o
diff --git a/arch/sh/mm/Makefile_64 b/arch/sh/mm/Makefile_64
index 9481d0f..2863ffb 100644
--- a/arch/sh/mm/Makefile_64
+++ b/arch/sh/mm/Makefile_64
@@ -13,6 +13,7 @@ obj-y += cache-sh5.o
endif
obj-y += $(mmu-y)
+obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_NUMA) += numa.o
diff --git a/arch/sh/mm/asids-debugfs.c b/arch/sh/mm/asids-debugfs.c
new file mode 100644
index 0000000..0678a10
--- /dev/null
+++ b/arch/sh/mm/asids-debugfs.c
@@ -0,0 +1,79 @@
+/*
+ * debugfs ops for process ASIDs
+ *
+ * Copyright (C) 2000, 2001 Paolo Alberelli
+ * Copyright (C) 2003 - 2008 Paul Mundt
+ * Copyright (C) 2003, 2004 Richard Curnow
+ *
+ * Provides a debugfs file that lists out the ASIDs currently associated
+ * with the processes.
+ *
+ * In the SH-5 case, if the DM.PC register is examined through the debug
+ * link, this shows ASID + PC. To make use of this, the PID->ASID
+ * relationship needs to be known. This is primarily for debugging.
+ *
+ * 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/module.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+#include <asm/processor.h>
+#include <asm/mmu_context.h>
+
+static int asids_seq_show(struct seq_file *file, void *iter)
+{
+ struct task_struct *p;
+
+ read_lock(&tasklist_lock);
+
+ for_each_process(p) {
+ int pid = p->pid;
+
+ if (unlikely(!pid))
+ continue;
+
+ if (p->mm)
+ seq_printf(file, "%5d : %02x\n", pid,
+ cpu_asid(smp_processor_id(), p->mm));
+ else
+ seq_printf(file, "%5d : (none)\n", pid);
+ }
+
+ read_unlock(&tasklist_lock);
+
+ return 0;
+}
+
+static int asids_debugfs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, asids_seq_show, inode->i_private);
+}
+
+static const struct file_operations asids_debugfs_fops = {
+ .owner = THIS_MODULE,
+ .open = asids_debugfs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init asids_debugfs_init(void)
+{
+ struct dentry *asids_dentry;
+
+ asids_dentry = debugfs_create_file("asids", S_IRUSR, sh_debugfs_root,
+ NULL, &asids_debugfs_fops);
+ if (!asids_dentry)
+ return -ENOMEM;
+ if (IS_ERR(asids_dentry))
+ return PTR_ERR(asids_dentry);
+
+ return 0;
+}
+module_init(asids_debugfs_init);
+
+MODULE_LICENSE("GPL v2");
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