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Diffstat (limited to 'arch/frv/kernel/sysctl.c')
-rw-r--r--arch/frv/kernel/sysctl.c221
1 files changed, 0 insertions, 221 deletions
diff --git a/arch/frv/kernel/sysctl.c b/arch/frv/kernel/sysctl.c
deleted file mode 100644
index b54a64971cf1..000000000000
--- a/arch/frv/kernel/sysctl.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/* sysctl.c: implementation of /proc/sys files relating to FRV specifically
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-#include <linux/uaccess.h>
-
-static const char frv_cache_wback[] = "wback";
-static const char frv_cache_wthru[] = "wthru";
-
-static void frv_change_dcache_mode(unsigned long newmode)
-{
- unsigned long flags, hsr0;
-
- local_irq_save(flags);
-
- hsr0 = __get_HSR(0);
- hsr0 &= ~HSR0_DCE;
- __set_HSR(0, hsr0);
-
- asm volatile(" dcef @(gr0,gr0),#1 \n"
- " membar \n"
- : : : "memory"
- );
-
- hsr0 = (hsr0 & ~HSR0_CBM) | newmode;
- __set_HSR(0, hsr0);
- hsr0 |= HSR0_DCE;
- __set_HSR(0, hsr0);
-
- local_irq_restore(flags);
-
- //printk("HSR0 now %08lx\n", hsr0);
-}
-
-/*****************************************************************************/
-/*
- * handle requests to dynamically switch the write caching mode delivered by /proc
- */
-static int procctl_frv_cachemode(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
-{
- unsigned long hsr0;
- char buff[8];
- int len;
-
- len = *lenp;
-
- if (write) {
- /* potential state change */
- if (len <= 1 || len > sizeof(buff) - 1)
- return -EINVAL;
-
- if (copy_from_user(buff, buffer, len) != 0)
- return -EFAULT;
-
- if (buff[len - 1] == '\n')
- buff[len - 1] = '\0';
- else
- buff[len] = '\0';
-
- if (strcmp(buff, frv_cache_wback) == 0) {
- /* switch dcache into write-back mode */
- frv_change_dcache_mode(HSR0_CBM_COPY_BACK);
- return 0;
- }
-
- if (strcmp(buff, frv_cache_wthru) == 0) {
- /* switch dcache into write-through mode */
- frv_change_dcache_mode(HSR0_CBM_WRITE_THRU);
- return 0;
- }
-
- return -EINVAL;
- }
-
- /* read the state */
- if (*ppos > 0) {
- *lenp = 0;
- return 0;
- }
-
- hsr0 = __get_HSR(0);
- switch (hsr0 & HSR0_CBM) {
- case HSR0_CBM_WRITE_THRU:
- memcpy(buff, frv_cache_wthru, sizeof(frv_cache_wthru) - 1);
- buff[sizeof(frv_cache_wthru) - 1] = '\n';
- len = sizeof(frv_cache_wthru);
- break;
- default:
- memcpy(buff, frv_cache_wback, sizeof(frv_cache_wback) - 1);
- buff[sizeof(frv_cache_wback) - 1] = '\n';
- len = sizeof(frv_cache_wback);
- break;
- }
-
- if (len > *lenp)
- len = *lenp;
-
- if (copy_to_user(buffer, buff, len) != 0)
- return -EFAULT;
-
- *lenp = len;
- *ppos = len;
- return 0;
-
-} /* end procctl_frv_cachemode() */
-
-/*****************************************************************************/
-/*
- * permit the mm_struct the nominated process is using have its MMU context ID pinned
- */
-#ifdef CONFIG_MMU
-static int procctl_frv_pin_cxnr(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
-{
- pid_t pid;
- char buff[16], *p;
- int len;
-
- len = *lenp;
-
- if (write) {
- /* potential state change */
- if (len <= 1 || len > sizeof(buff) - 1)
- return -EINVAL;
-
- if (copy_from_user(buff, buffer, len) != 0)
- return -EFAULT;
-
- if (buff[len - 1] == '\n')
- buff[len - 1] = '\0';
- else
- buff[len] = '\0';
-
- pid = simple_strtoul(buff, &p, 10);
- if (*p)
- return -EINVAL;
-
- return cxn_pin_by_pid(pid);
- }
-
- /* read the currently pinned CXN */
- if (*ppos > 0) {
- *lenp = 0;
- return 0;
- }
-
- len = snprintf(buff, sizeof(buff), "%d\n", cxn_pinned);
- if (len > *lenp)
- len = *lenp;
-
- if (copy_to_user(buffer, buff, len) != 0)
- return -EFAULT;
-
- *lenp = len;
- *ppos = len;
- return 0;
-
-} /* end procctl_frv_pin_cxnr() */
-#endif
-
-/*
- * FR-V specific sysctls
- */
-static struct ctl_table frv_table[] =
-{
- {
- .procname = "cache-mode",
- .data = NULL,
- .maxlen = 0,
- .mode = 0644,
- .proc_handler = procctl_frv_cachemode,
- },
-#ifdef CONFIG_MMU
- {
- .procname = "pin-cxnr",
- .data = NULL,
- .maxlen = 0,
- .mode = 0644,
- .proc_handler = procctl_frv_pin_cxnr
- },
-#endif
- {}
-};
-
-/*
- * Use a temporary sysctl number. Horrid, but will be cleaned up in 2.6
- * when all the PM interfaces exist nicely.
- */
-static struct ctl_table frv_dir_table[] =
-{
- {
- .procname = "frv",
- .mode = 0555,
- .child = frv_table
- },
- {}
-};
-
-/*
- * Initialize power interface
- */
-static int __init frv_sysctl_init(void)
-{
- register_sysctl_table(frv_dir_table);
- return 0;
-}
-
-__initcall(frv_sysctl_init);