diff options
Diffstat (limited to 'arch/frv/kernel/sysctl.c')
| -rw-r--r-- | arch/frv/kernel/sysctl.c | 221 |
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); |