powerpc: Merge in the ppc64 version of the prom code.

This brings in the ppc64 version of prom_init.c, prom.c and btext.c
and makes them work for ppc32.  This also brings in the new calling
convention, where the first entry to the kernel (with r5 != 0) goes
to the prom_init code, which then restarts from the beginning (with
r5 == 0) after it has done its stuff.

For now this also brings in the ppc32 version of setup.c.  It also
merges lmb.h.

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 249 insertions, 0 deletions

diff --git a/include/asm-powerpc/rtas.h b/include/asm-powerpc/rtas.h
new file mode 100644
index 000000000000..5c904d371963
--- /dev/null
+++ b/include/asm-powerpc/rtas.h
@@ -0,0 +1,249 @@
+#ifndef _POWERPC_RTAS_H
+#define _POWERPC_RTAS_H
+
+#include <linux/spinlock.h>
+#include <asm/page.h>
+
+/*
+ * Definitions for talking to the RTAS on CHRP machines.
+ *
+ * Copyright (C) 2001 Peter Bergner
+ * Copyright (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.
+ */
+
+#define RTAS_UNKNOWN_SERVICE (-1)
+#define RTAS_INSTANTIATE_MAX (1UL<<30) /* Don't instantiate rtas at/above this value */
+
+/* Buffer size for ppc_rtas system call. */
+#define RTAS_RMOBUF_MAX (64 * 1024)
+
+/* RTAS return status codes */
+#define RTAS_BUSY		-2    /* RTAS Busy */
+#define RTAS_EXTENDED_DELAY_MIN	9900
+#define RTAS_EXTENDED_DELAY_MAX	9905
+
+/*
+ * In general to call RTAS use rtas_token("string") to lookup
+ * an RTAS token for the given string (e.g. "event-scan").
+ * To actually perform the call use
+ *    ret = rtas_call(token, n_in, n_out, ...)
+ * Where n_in is the number of input parameters and
+ *       n_out is the number of output parameters
+ *
+ * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
+ * will be returned as a token.  rtas_call() does look for this
+ * token and error out gracefully so rtas_call(rtas_token("str"), ...)
+ * may be safely used for one-shot calls to RTAS.
+ *
+ */
+
+typedef u32 rtas_arg_t;
+
+struct rtas_args {
+	u32 token;
+	u32 nargs;
+	u32 nret; 
+	rtas_arg_t args[16];
+	rtas_arg_t *rets;     /* Pointer to return values in args[]. */
+};  
+
+extern struct rtas_args rtas_stop_self_args;
+
+struct rtas_t {
+	unsigned long entry;		/* physical address pointer */
+	unsigned long base;		/* physical address pointer */
+	unsigned long size;
+	spinlock_t lock;
+	struct rtas_args args;
+	struct device_node *dev;	/* virtual address pointer */
+};
+
+/* RTAS event classes */
+#define RTAS_INTERNAL_ERROR		0x80000000 /* set bit 0 */
+#define RTAS_EPOW_WARNING		0x40000000 /* set bit 1 */
+#define RTAS_POWERMGM_EVENTS		0x20000000 /* set bit 2 */
+#define RTAS_HOTPLUG_EVENTS		0x10000000 /* set bit 3 */
+#define RTAS_EVENT_SCAN_ALL_EVENTS	0xf0000000
+
+/* RTAS event severity */
+#define RTAS_SEVERITY_FATAL		0x5
+#define RTAS_SEVERITY_ERROR		0x4
+#define RTAS_SEVERITY_ERROR_SYNC	0x3
+#define RTAS_SEVERITY_WARNING		0x2
+#define RTAS_SEVERITY_EVENT		0x1
+#define RTAS_SEVERITY_NO_ERROR		0x0
+
+/* RTAS event disposition */
+#define RTAS_DISP_FULLY_RECOVERED	0x0
+#define RTAS_DISP_LIMITED_RECOVERY	0x1
+#define RTAS_DISP_NOT_RECOVERED		0x2
+
+/* RTAS event initiator */
+#define RTAS_INITIATOR_UNKNOWN		0x0
+#define RTAS_INITIATOR_CPU		0x1
+#define RTAS_INITIATOR_PCI		0x2
+#define RTAS_INITIATOR_ISA		0x3
+#define RTAS_INITIATOR_MEMORY		0x4
+#define RTAS_INITIATOR_POWERMGM		0x5
+
+/* RTAS event target */
+#define RTAS_TARGET_UNKNOWN		0x0
+#define RTAS_TARGET_CPU			0x1
+#define RTAS_TARGET_PCI			0x2
+#define RTAS_TARGET_ISA			0x3
+#define RTAS_TARGET_MEMORY		0x4
+#define RTAS_TARGET_POWERMGM		0x5
+
+/* RTAS event type */
+#define RTAS_TYPE_RETRY			0x01
+#define RTAS_TYPE_TCE_ERR		0x02
+#define RTAS_TYPE_INTERN_DEV_FAIL	0x03
+#define RTAS_TYPE_TIMEOUT		0x04
+#define RTAS_TYPE_DATA_PARITY		0x05
+#define RTAS_TYPE_ADDR_PARITY		0x06
+#define RTAS_TYPE_CACHE_PARITY		0x07
+#define RTAS_TYPE_ADDR_INVALID		0x08
+#define RTAS_TYPE_ECC_UNCORR		0x09
+#define RTAS_TYPE_ECC_CORR		0x0a
+#define RTAS_TYPE_EPOW			0x40
+#define RTAS_TYPE_PLATFORM		0xE0
+#define RTAS_TYPE_IO			0xE1
+#define RTAS_TYPE_INFO			0xE2
+#define RTAS_TYPE_DEALLOC		0xE3
+#define RTAS_TYPE_DUMP			0xE4
+/* I don't add PowerMGM events right now, this is a different topic */ 
+#define RTAS_TYPE_PMGM_POWER_SW_ON	0x60
+#define RTAS_TYPE_PMGM_POWER_SW_OFF	0x61
+#define RTAS_TYPE_PMGM_LID_OPEN		0x62
+#define RTAS_TYPE_PMGM_LID_CLOSE	0x63
+#define RTAS_TYPE_PMGM_SLEEP_BTN	0x64
+#define RTAS_TYPE_PMGM_WAKE_BTN		0x65
+#define RTAS_TYPE_PMGM_BATTERY_WARN	0x66
+#define RTAS_TYPE_PMGM_BATTERY_CRIT	0x67
+#define RTAS_TYPE_PMGM_SWITCH_TO_BAT	0x68
+#define RTAS_TYPE_PMGM_SWITCH_TO_AC	0x69
+#define RTAS_TYPE_PMGM_KBD_OR_MOUSE	0x6a
+#define RTAS_TYPE_PMGM_ENCLOS_OPEN	0x6b
+#define RTAS_TYPE_PMGM_ENCLOS_CLOSED	0x6c
+#define RTAS_TYPE_PMGM_RING_INDICATE	0x6d
+#define RTAS_TYPE_PMGM_LAN_ATTENTION	0x6e
+#define RTAS_TYPE_PMGM_TIME_ALARM	0x6f
+#define RTAS_TYPE_PMGM_CONFIG_CHANGE	0x70
+#define RTAS_TYPE_PMGM_SERVICE_PROC	0x71
+
+struct rtas_error_log {
+	unsigned long version:8;		/* Architectural version */
+	unsigned long severity:3;		/* Severity level of error */
+	unsigned long disposition:2;		/* Degree of recovery */
+	unsigned long extended:1;		/* extended log present? */
+	unsigned long /* reserved */ :2;	/* Reserved for future use */
+	unsigned long initiator:4;		/* Initiator of event */
+	unsigned long target:4;			/* Target of failed operation */
+	unsigned long type:8;			/* General event or error*/
+	unsigned long extended_log_length:32;	/* length in bytes */
+	unsigned char buffer[1];
+};
+
+struct flash_block {
+	char *data;
+	unsigned long length;
+};
+
+/* This struct is very similar but not identical to
+ * that needed by the rtas flash update.
+ * All we need to do for rtas is rewrite num_blocks
+ * into a version/length and translate the pointers
+ * to absolute.
+ */
+#define FLASH_BLOCKS_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct flash_block))
+struct flash_block_list {
+	unsigned long num_blocks;
+	struct flash_block_list *next;
+	struct flash_block blocks[FLASH_BLOCKS_PER_NODE];
+};
+struct flash_block_list_header { /* just the header of flash_block_list */
+	unsigned long num_blocks;
+	struct flash_block_list *next;
+};
+extern struct flash_block_list_header rtas_firmware_flash_list;
+
+extern struct rtas_t rtas;
+
+extern void enter_rtas(unsigned long);
+extern int rtas_token(const char *service);
+extern int rtas_call(int token, int, int, int *, ...);
+extern void call_rtas_display_status(unsigned char);
+extern void rtas_restart(char *cmd);
+extern void rtas_power_off(void);
+extern void rtas_halt(void);
+extern void rtas_os_term(char *str);
+extern int rtas_get_sensor(int sensor, int index, int *state);
+extern int rtas_get_power_level(int powerdomain, int *level);
+extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
+extern int rtas_set_indicator(int indicator, int index, int new_value);
+extern void rtas_progress(char *s, unsigned short hex);
+extern void rtas_initialize(void);
+
+struct rtc_time;
+extern void rtas_get_boot_time(struct rtc_time *rtc_time);
+extern void rtas_get_rtc_time(struct rtc_time *rtc_time);
+extern int rtas_set_rtc_time(struct rtc_time *rtc_time);
+
+/* Given an RTAS status code of 9900..9905 compute the hinted delay */
+unsigned int rtas_extended_busy_delay_time(int status);
+static inline int rtas_is_extended_busy(int status)
+{
+	return status >= 9900 && status <= 9909;
+}
+
+extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
+
+/* Error types logged.  */
+#define ERR_FLAG_ALREADY_LOGGED	0x0
+#define ERR_FLAG_BOOT		0x1 	/* log was pulled from NVRAM on boot */
+#define ERR_TYPE_RTAS_LOG	0x2	/* from rtas event-scan */
+#define ERR_TYPE_KERNEL_PANIC	0x4	/* from panic() */
+
+/* All the types and not flags */
+#define ERR_TYPE_MASK	(ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
+
+#define RTAS_DEBUG KERN_DEBUG "RTAS: "
+ 
+#define RTAS_ERROR_LOG_MAX 2048
+
+/*
+ * Return the firmware-specified size of the error log buffer
+ *  for all rtas calls that require an error buffer argument.
+ *  This includes 'check-exception' and 'rtas-last-error'.
+ */
+extern int rtas_get_error_log_max(void);
+
+/* Event Scan Parameters */
+#define EVENT_SCAN_ALL_EVENTS	0xf0000000
+#define SURVEILLANCE_TOKEN	9000
+#define LOG_NUMBER		64		/* must be a power of two */
+#define LOG_NUMBER_MASK		(LOG_NUMBER-1)
+
+/* Some RTAS ops require a data buffer and that buffer must be < 4G.
+ * Rather than having a memory allocator, just use this buffer
+ * (get the lock first), make the RTAS call.  Copy the data instead
+ * of holding the buffer for long.
+ */
+
+#define RTAS_DATA_BUF_SIZE 4096
+extern spinlock_t rtas_data_buf_lock;
+extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
+
+extern void rtas_stop_self(void);
+
+/* RMO buffer reserved for user-space RTAS use */
+extern unsigned long rtas_rmo_buf;
+
+#define GLOBAL_INTERRUPT_QUEUE 9005
+
+#endif /* _POWERPC_RTAS_H */