initial_commit

1 files changed, 112 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/nvram.h b/arch/powerpc/include/asm/nvram.h
new file mode 100644
index 00000000..9d1aafe6
--- /dev/null
+++ b/arch/powerpc/include/asm/nvram.h
@@ -0,0 +1,112 @@
+/*
+ * NVRAM definitions and access functions.
+ *
+ * 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.
+ */
+
+#ifndef _ASM_POWERPC_NVRAM_H
+#define _ASM_POWERPC_NVRAM_H
+
+/* Signatures for nvram partitions */
+#define NVRAM_SIG_SP	0x02	/* support processor */
+#define NVRAM_SIG_OF	0x50	/* open firmware config */
+#define NVRAM_SIG_FW	0x51	/* general firmware */
+#define NVRAM_SIG_HW	0x52	/* hardware (VPD) */
+#define NVRAM_SIG_FLIP	0x5a	/* Apple flip/flop header */
+#define NVRAM_SIG_APPL	0x5f	/* Apple "system" (???) */
+#define NVRAM_SIG_SYS	0x70	/* system env vars */
+#define NVRAM_SIG_CFG	0x71	/* config data */
+#define NVRAM_SIG_ELOG	0x72	/* error log */
+#define NVRAM_SIG_VEND	0x7e	/* vendor defined */
+#define NVRAM_SIG_FREE	0x7f	/* Free space */
+#define NVRAM_SIG_OS	0xa0	/* OS defined */
+#define NVRAM_SIG_PANIC	0xa1	/* Apple OSX "panic" */
+
+#ifdef __KERNEL__
+
+#include <linux/errno.h>
+#include <linux/list.h>
+
+#ifdef CONFIG_PPC_PSERIES
+extern int nvram_write_error_log(char * buff, int length,
+					 unsigned int err_type, unsigned int err_seq);
+extern int nvram_read_error_log(char * buff, int length,
+					 unsigned int * err_type, unsigned int *err_seq);
+extern int nvram_clear_error_log(void);
+extern int pSeries_nvram_init(void);
+#endif /* CONFIG_PPC_PSERIES */
+
+#ifdef CONFIG_MMIO_NVRAM
+extern int mmio_nvram_init(void);
+#else
+static inline int mmio_nvram_init(void)
+{
+	return -ENODEV;
+}
+#endif
+
+extern int __init nvram_scan_partitions(void);
+extern loff_t nvram_create_partition(const char *name, int sig,
+				     int req_size, int min_size);
+extern int nvram_remove_partition(const char *name, int sig,
+					const char *exceptions[]);
+extern int nvram_get_partition_size(loff_t data_index);
+extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
+
+#endif /* __KERNEL__ */
+
+/* PowerMac specific nvram stuffs */
+
+enum {
+	pmac_nvram_OF,		/* Open Firmware partition */
+	pmac_nvram_XPRAM,	/* MacOS XPRAM partition */
+	pmac_nvram_NR		/* MacOS Name Registry partition */
+};
+
+#ifdef __KERNEL__
+/* Return partition offset in nvram */
+extern int	pmac_get_partition(int partition);
+
+/* Direct access to XPRAM on PowerMacs */
+extern u8	pmac_xpram_read(int xpaddr);
+extern void	pmac_xpram_write(int xpaddr, u8 data);
+
+/* Synchronize NVRAM */
+extern void	nvram_sync(void);
+
+/* Determine NVRAM size */
+extern ssize_t nvram_get_size(void);
+
+/* Normal access to NVRAM */
+extern unsigned char nvram_read_byte(int i);
+extern void nvram_write_byte(unsigned char c, int i);
+#endif
+
+/* Some offsets in XPRAM */
+#define PMAC_XPRAM_MACHINE_LOC	0xe4
+#define PMAC_XPRAM_SOUND_VOLUME	0x08
+
+/* Machine location structure in PowerMac XPRAM */
+struct pmac_machine_location {
+	unsigned int	latitude;	/* 2+30 bit Fractional number */
+	unsigned int	longitude;	/* 2+30 bit Fractional number */
+	unsigned int	delta;		/* mix of GMT delta and DLS */
+};
+
+/*
+ * /dev/nvram ioctls
+ *
+ * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
+ * definitely obsolete. Do not use it if you can avoid it
+ */
+
+#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
+				_IOWR('p', 0x40, int)
+
+#define IOC_NVRAM_GET_OFFSET	_IOWR('p', 0x42, int)	/* Get NVRAM partition offset */
+#define IOC_NVRAM_SYNC		_IO('p', 0x43)		/* Sync NVRAM image */
+
+#endif /* _ASM_POWERPC_NVRAM_H */