diff options
Diffstat (limited to 'arch/ppc/syslib/prep_nvram.c')
-rw-r--r-- | arch/ppc/syslib/prep_nvram.c | 135 |
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; - } -} |