summaryrefslogtreecommitdiff
path: root/arch/ppc/syslib/prep_nvram.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/syslib/prep_nvram.c')
-rw-r--r--arch/ppc/syslib/prep_nvram.c135
1 files changed, 0 insertions, 135 deletions
diff --git a/arch/ppc/syslib/prep_nvram.c b/arch/ppc/syslib/prep_nvram.c
deleted file mode 100644
index 474dccbc4a8a..000000000000
--- a/arch/ppc/syslib/prep_nvram.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*
- * Copyright (C) 1998 Corey Minyard
- *
- * This reads the NvRAM on PReP compliant machines (generally from IBM or
- * Motorola). Motorola kept the format of NvRAM in their ROM, PPCBUG, the
- * same, long after they had stopped producing PReP compliant machines. So
- * this code is useful in those cases as well.
- *
- */
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-
-#include <asm/sections.h>
-#include <asm/io.h>
-#include <asm/machdep.h>
-#include <asm/prep_nvram.h>
-
-static char nvramData[MAX_PREP_NVRAM];
-static NVRAM_MAP *nvram=(NVRAM_MAP *)&nvramData[0];
-
-unsigned char prep_nvram_read_val(int addr)
-{
- outb(addr, PREP_NVRAM_AS0);
- outb(addr>>8, PREP_NVRAM_AS1);
- return inb(PREP_NVRAM_DATA);
-}
-
-void prep_nvram_write_val(int addr,
- unsigned char val)
-{
- outb(addr, PREP_NVRAM_AS0);
- outb(addr>>8, PREP_NVRAM_AS1);
- outb(val, PREP_NVRAM_DATA);
-}
-
-void __init init_prep_nvram(void)
-{
- unsigned char *nvp;
- int i;
- int nvramSize;
-
- /*
- * The following could fail if the NvRAM were corrupt but
- * we expect the boot firmware to have checked its checksum
- * before boot
- */
- nvp = (char *) &nvram->Header;
- for (i=0; i<sizeof(HEADER); i++)
- {
- *nvp = ppc_md.nvram_read_val(i);
- nvp++;
- }
-
- /*
- * The PReP NvRAM may be any size so read in the header to
- * determine how much we must read in order to get the complete
- * GE area
- */
- nvramSize=(int)nvram->Header.GEAddress+nvram->Header.GELength;
- if(nvramSize>MAX_PREP_NVRAM)
- {
- /*
- * NvRAM is too large
- */
- nvram->Header.GELength=0;
- return;
- }
-
- /*
- * Read the remainder of the PReP NvRAM
- */
- nvp = (char *) &nvram->GEArea[0];
- for (i=sizeof(HEADER); i<nvramSize; i++)
- {
- *nvp = ppc_md.nvram_read_val(i);
- nvp++;
- }
-}
-
-char *prep_nvram_get_var(const char *name)
-{
- char *cp;
- int namelen;
-
- namelen = strlen(name);
- cp = prep_nvram_first_var();
- while (cp != NULL) {
- if ((strncmp(name, cp, namelen) == 0)
- && (cp[namelen] == '='))
- {
- return cp+namelen+1;
- }
- cp = prep_nvram_next_var(cp);
- }
-
- return NULL;
-}
-
-char *prep_nvram_first_var(void)
-{
- if (nvram->Header.GELength == 0) {
- return NULL;
- } else {
- return (((char *)nvram)
- + ((unsigned int) nvram->Header.GEAddress));
- }
-}
-
-char *prep_nvram_next_var(char *name)
-{
- char *cp;
-
-
- cp = name;
- while (((cp - ((char *) nvram->GEArea)) < nvram->Header.GELength)
- && (*cp != '\0'))
- {
- cp++;
- }
-
- /* Skip over any null characters. */
- while (((cp - ((char *) nvram->GEArea)) < nvram->Header.GELength)
- && (*cp == '\0'))
- {
- cp++;
- }
-
- if ((cp - ((char *) nvram->GEArea)) < nvram->Header.GELength) {
- return cp;
- } else {
- return NULL;
- }
-}