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 */