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Diffstat (limited to 'arch/ppc64/kernel/pSeries_nvram.c')
-rw-r--r--arch/ppc64/kernel/pSeries_nvram.c148
1 files changed, 0 insertions, 148 deletions
diff --git a/arch/ppc64/kernel/pSeries_nvram.c b/arch/ppc64/kernel/pSeries_nvram.c
deleted file mode 100644
index 18abfb1f4e2..00000000000
--- a/arch/ppc64/kernel/pSeries_nvram.c
+++ /dev/null
@@ -1,148 +0,0 @@
-/*
- * c 2001 PPC 64 Team, IBM Corp
- *
- * 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.
- *
- * /dev/nvram driver for PPC64
- *
- * This perhaps should live in drivers/char
- */
-
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <asm/uaccess.h>
-#include <asm/nvram.h>
-#include <asm/rtas.h>
-#include <asm/prom.h>
-#include <asm/machdep.h>
-
-static unsigned int nvram_size;
-static int nvram_fetch, nvram_store;
-static char nvram_buf[NVRW_CNT]; /* assume this is in the first 4GB */
-static DEFINE_SPINLOCK(nvram_lock);
-
-
-static ssize_t pSeries_nvram_read(char *buf, size_t count, loff_t *index)
-{
- unsigned int i;
- unsigned long len;
- int done;
- unsigned long flags;
- char *p = buf;
-
-
- if (nvram_size == 0 || nvram_fetch == RTAS_UNKNOWN_SERVICE)
- return -ENODEV;
-
- if (*index >= nvram_size)
- return 0;
-
- i = *index;
- if (i + count > nvram_size)
- count = nvram_size - i;
-
- spin_lock_irqsave(&nvram_lock, flags);
-
- for (; count != 0; count -= len) {
- len = count;
- if (len > NVRW_CNT)
- len = NVRW_CNT;
-
- if ((rtas_call(nvram_fetch, 3, 2, &done, i, __pa(nvram_buf),
- len) != 0) || len != done) {
- spin_unlock_irqrestore(&nvram_lock, flags);
- return -EIO;
- }
-
- memcpy(p, nvram_buf, len);
-
- p += len;
- i += len;
- }
-
- spin_unlock_irqrestore(&nvram_lock, flags);
-
- *index = i;
- return p - buf;
-}
-
-static ssize_t pSeries_nvram_write(char *buf, size_t count, loff_t *index)
-{
- unsigned int i;
- unsigned long len;
- int done;
- unsigned long flags;
- const char *p = buf;
-
- if (nvram_size == 0 || nvram_store == RTAS_UNKNOWN_SERVICE)
- return -ENODEV;
-
- if (*index >= nvram_size)
- return 0;
-
- i = *index;
- if (i + count > nvram_size)
- count = nvram_size - i;
-
- spin_lock_irqsave(&nvram_lock, flags);
-
- for (; count != 0; count -= len) {
- len = count;
- if (len > NVRW_CNT)
- len = NVRW_CNT;
-
- memcpy(nvram_buf, p, len);
-
- if ((rtas_call(nvram_store, 3, 2, &done, i, __pa(nvram_buf),
- len) != 0) || len != done) {
- spin_unlock_irqrestore(&nvram_lock, flags);
- return -EIO;
- }
-
- p += len;
- i += len;
- }
- spin_unlock_irqrestore(&nvram_lock, flags);
-
- *index = i;
- return p - buf;
-}
-
-static ssize_t pSeries_nvram_get_size(void)
-{
- return nvram_size ? nvram_size : -ENODEV;
-}
-
-int __init pSeries_nvram_init(void)
-{
- struct device_node *nvram;
- unsigned int *nbytes_p, proplen;
-
- nvram = of_find_node_by_type(NULL, "nvram");
- if (nvram == NULL)
- return -ENODEV;
-
- nbytes_p = (unsigned int *)get_property(nvram, "#bytes", &proplen);
- if (nbytes_p == NULL || proplen != sizeof(unsigned int))
- return -EIO;
-
- nvram_size = *nbytes_p;
-
- nvram_fetch = rtas_token("nvram-fetch");
- nvram_store = rtas_token("nvram-store");
- printk(KERN_INFO "PPC64 nvram contains %d bytes\n", nvram_size);
- of_node_put(nvram);
-
- ppc_md.nvram_read = pSeries_nvram_read;
- ppc_md.nvram_write = pSeries_nvram_write;
- ppc_md.nvram_size = pSeries_nvram_get_size;
-
- return 0;
-}