2005-04-16 16:20:36 -06:00
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/*
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*
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* Procedures for interfacing to the RTAS on CHRP machines.
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*
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* Peter Bergner, IBM March 2001.
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* Copyright (C) 2001 IBM.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/init.h>
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2006-01-11 13:17:48 -07:00
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#include <linux/capability.h>
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2005-11-06 22:41:59 -07:00
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#include <linux/delay.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/prom.h>
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#include <asm/rtas.h>
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2006-01-30 23:17:47 -07:00
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#include <asm/hvcall.h>
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2005-04-16 16:20:36 -06:00
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#include <asm/semaphore.h>
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#include <asm/machdep.h>
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#include <asm/page.h>
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#include <asm/param.h>
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#include <asm/system.h>
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#include <asm/delay.h>
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#include <asm/uaccess.h>
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2005-10-26 01:05:24 -06:00
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#include <asm/lmb.h>
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2006-01-10 17:54:09 -07:00
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#include <asm/udbg.h>
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2006-03-22 16:00:08 -07:00
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#include <asm/syscalls.h>
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2005-04-16 16:20:36 -06:00
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2005-10-26 01:05:24 -06:00
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struct rtas_t rtas = {
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2005-04-16 16:20:36 -06:00
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.lock = SPIN_LOCK_UNLOCKED
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};
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2006-01-13 17:39:24 -07:00
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struct rtas_suspend_me_data {
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long waiting;
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struct rtas_args *args;
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};
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2005-04-16 16:20:36 -06:00
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EXPORT_SYMBOL(rtas);
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DEFINE_SPINLOCK(rtas_data_buf_lock);
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2005-10-26 01:05:24 -06:00
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char rtas_data_buf[RTAS_DATA_BUF_SIZE] __cacheline_aligned;
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2005-04-16 16:20:36 -06:00
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unsigned long rtas_rmo_buf;
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2005-11-02 20:41:19 -07:00
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/*
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* If non-NULL, this gets called when the kernel terminates.
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* This is done like this so rtas_flash can be a module.
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*/
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void (*rtas_flash_term_hook)(int);
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EXPORT_SYMBOL(rtas_flash_term_hook);
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2005-10-26 01:05:24 -06:00
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/*
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* call_rtas_display_status and call_rtas_display_status_delay
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* are designed only for very early low-level debugging, which
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* is why the token is hard-coded to 10.
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*/
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2006-01-10 17:54:09 -07:00
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static void call_rtas_display_status(char c)
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2005-04-16 16:20:36 -06:00
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{
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struct rtas_args *args = &rtas.args;
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unsigned long s;
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if (!rtas.base)
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return;
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spin_lock_irqsave(&rtas.lock, s);
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args->token = 10;
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args->nargs = 1;
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args->nret = 1;
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args->rets = (rtas_arg_t *)&(args->args[1]);
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2006-01-10 17:54:09 -07:00
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args->args[0] = (unsigned char)c;
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2005-04-16 16:20:36 -06:00
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enter_rtas(__pa(args));
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spin_unlock_irqrestore(&rtas.lock, s);
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}
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2006-01-10 17:54:09 -07:00
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static void call_rtas_display_status_delay(char c)
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2005-04-16 16:20:36 -06:00
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{
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static int pending_newline = 0; /* did last write end with unprinted newline? */
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static int width = 16;
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if (c == '\n') {
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while (width-- > 0)
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call_rtas_display_status(' ');
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width = 16;
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2005-11-06 22:41:59 -07:00
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mdelay(500);
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2005-04-16 16:20:36 -06:00
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pending_newline = 1;
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} else {
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if (pending_newline) {
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call_rtas_display_status('\r');
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call_rtas_display_status('\n');
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}
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pending_newline = 0;
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if (width--) {
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call_rtas_display_status(c);
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udelay(10000);
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}
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}
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}
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2006-01-10 17:54:09 -07:00
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void __init udbg_init_rtas(void)
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{
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udbg_putc = call_rtas_display_status_delay;
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}
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2005-10-26 01:05:24 -06:00
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void rtas_progress(char *s, unsigned short hex)
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2005-06-22 17:43:28 -06:00
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{
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struct device_node *root;
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int width, *p;
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char *os;
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static int display_character, set_indicator;
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2005-06-23 00:09:41 -06:00
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static int display_width, display_lines, *row_width, form_feed;
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2005-06-22 17:43:28 -06:00
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static DEFINE_SPINLOCK(progress_lock);
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2005-06-23 00:09:41 -06:00
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static int current_line;
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2005-06-22 17:43:28 -06:00
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static int pending_newline = 0; /* did last write end with unprinted newline? */
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if (!rtas.base)
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return;
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2005-06-23 00:09:41 -06:00
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if (display_width == 0) {
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display_width = 0x10;
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if ((root = find_path_device("/rtas"))) {
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if ((p = (unsigned int *)get_property(root,
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"ibm,display-line-length", NULL)))
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display_width = *p;
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if ((p = (unsigned int *)get_property(root,
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"ibm,form-feed", NULL)))
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form_feed = *p;
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if ((p = (unsigned int *)get_property(root,
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"ibm,display-number-of-lines", NULL)))
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display_lines = *p;
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row_width = (unsigned int *)get_property(root,
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"ibm,display-truncation-length", NULL);
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}
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2005-06-22 17:43:28 -06:00
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display_character = rtas_token("display-character");
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set_indicator = rtas_token("set-indicator");
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}
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if (display_character == RTAS_UNKNOWN_SERVICE) {
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/* use hex display if available */
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if (set_indicator != RTAS_UNKNOWN_SERVICE)
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rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
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return;
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}
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spin_lock(&progress_lock);
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/*
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* Last write ended with newline, but we didn't print it since
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* it would just clear the bottom line of output. Print it now
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* instead.
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*
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2005-06-23 00:09:41 -06:00
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* If no newline is pending and form feed is supported, clear the
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* display with a form feed; otherwise, print a CR to start output
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* at the beginning of the line.
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2005-06-22 17:43:28 -06:00
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*/
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if (pending_newline) {
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rtas_call(display_character, 1, 1, NULL, '\r');
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rtas_call(display_character, 1, 1, NULL, '\n');
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pending_newline = 0;
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} else {
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2005-06-23 00:09:41 -06:00
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current_line = 0;
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if (form_feed)
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rtas_call(display_character, 1, 1, NULL,
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(char)form_feed);
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else
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rtas_call(display_character, 1, 1, NULL, '\r');
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2005-06-22 17:43:28 -06:00
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}
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2005-06-23 00:09:41 -06:00
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if (row_width)
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width = row_width[current_line];
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else
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width = display_width;
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2005-06-22 17:43:28 -06:00
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os = s;
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while (*os) {
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if (*os == '\n' || *os == '\r') {
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/* If newline is the last character, save it
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* until next call to avoid bumping up the
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* display output.
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*/
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if (*os == '\n' && !os[1]) {
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pending_newline = 1;
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2005-06-23 00:09:41 -06:00
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current_line++;
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if (current_line > display_lines-1)
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current_line = display_lines-1;
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2005-06-22 17:43:28 -06:00
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spin_unlock(&progress_lock);
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return;
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}
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/* RTAS wants CR-LF, not just LF */
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if (*os == '\n') {
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rtas_call(display_character, 1, 1, NULL, '\r');
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rtas_call(display_character, 1, 1, NULL, '\n');
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} else {
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/* CR might be used to re-draw a line, so we'll
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* leave it alone and not add LF.
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*/
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rtas_call(display_character, 1, 1, NULL, *os);
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}
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2005-06-23 00:09:41 -06:00
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if (row_width)
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width = row_width[current_line];
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else
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width = display_width;
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2005-06-22 17:43:28 -06:00
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} else {
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width--;
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rtas_call(display_character, 1, 1, NULL, *os);
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}
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os++;
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/* if we overwrite the screen length */
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if (width <= 0)
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while ((*os != 0) && (*os != '\n') && (*os != '\r'))
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os++;
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}
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spin_unlock(&progress_lock);
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}
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2005-11-02 20:41:19 -07:00
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EXPORT_SYMBOL(rtas_progress); /* needed by rtas_flash module */
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2005-06-22 17:43:28 -06:00
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2005-10-26 01:05:24 -06:00
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int rtas_token(const char *service)
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2005-04-16 16:20:36 -06:00
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{
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int *tokp;
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2005-10-26 01:05:24 -06:00
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if (rtas.dev == NULL)
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2005-04-16 16:20:36 -06:00
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return RTAS_UNKNOWN_SERVICE;
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tokp = (int *) get_property(rtas.dev, service, NULL);
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return tokp ? *tokp : RTAS_UNKNOWN_SERVICE;
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}
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2005-10-26 01:05:24 -06:00
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#ifdef CONFIG_RTAS_ERROR_LOGGING
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2005-04-16 16:20:36 -06:00
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/*
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* Return the firmware-specified size of the error log buffer
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* for all rtas calls that require an error buffer argument.
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* This includes 'check-exception' and 'rtas-last-error'.
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*/
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int rtas_get_error_log_max(void)
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{
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static int rtas_error_log_max;
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if (rtas_error_log_max)
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return rtas_error_log_max;
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rtas_error_log_max = rtas_token ("rtas-error-log-max");
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if ((rtas_error_log_max == RTAS_UNKNOWN_SERVICE) ||
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(rtas_error_log_max > RTAS_ERROR_LOG_MAX)) {
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2005-10-26 01:05:24 -06:00
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printk (KERN_WARNING "RTAS: bad log buffer size %d\n",
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rtas_error_log_max);
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2005-04-16 16:20:36 -06:00
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rtas_error_log_max = RTAS_ERROR_LOG_MAX;
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}
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return rtas_error_log_max;
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}
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2005-10-26 01:05:24 -06:00
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EXPORT_SYMBOL(rtas_get_error_log_max);
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2005-04-16 16:20:36 -06:00
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2005-10-26 01:05:24 -06:00
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char rtas_err_buf[RTAS_ERROR_LOG_MAX];
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int rtas_last_error_token;
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2005-04-16 16:20:36 -06:00
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/** Return a copy of the detailed error text associated with the
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* most recent failed call to rtas. Because the error text
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* might go stale if there are any other intervening rtas calls,
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* this routine must be called atomically with whatever produced
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* the error (i.e. with rtas.lock still held from the previous call).
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*/
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2005-10-26 01:05:24 -06:00
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static char *__fetch_rtas_last_error(char *altbuf)
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2005-04-16 16:20:36 -06:00
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{
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struct rtas_args err_args, save_args;
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u32 bufsz;
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2005-10-26 01:05:24 -06:00
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char *buf = NULL;
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if (rtas_last_error_token == -1)
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return NULL;
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2005-04-16 16:20:36 -06:00
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bufsz = rtas_get_error_log_max();
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2005-10-26 01:05:24 -06:00
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err_args.token = rtas_last_error_token;
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2005-04-16 16:20:36 -06:00
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err_args.nargs = 2;
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err_args.nret = 1;
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err_args.args[0] = (rtas_arg_t)__pa(rtas_err_buf);
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err_args.args[1] = bufsz;
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err_args.args[2] = 0;
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save_args = rtas.args;
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rtas.args = err_args;
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enter_rtas(__pa(&rtas.args));
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err_args = rtas.args;
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rtas.args = save_args;
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2005-10-26 01:05:24 -06:00
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/* Log the error in the unlikely case that there was one. */
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if (unlikely(err_args.args[2] == 0)) {
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if (altbuf) {
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buf = altbuf;
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} else {
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buf = rtas_err_buf;
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if (mem_init_done)
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buf = kmalloc(RTAS_ERROR_LOG_MAX, GFP_ATOMIC);
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}
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if (buf)
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memcpy(buf, rtas_err_buf, RTAS_ERROR_LOG_MAX);
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}
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return buf;
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2005-04-16 16:20:36 -06:00
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}
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2005-10-26 01:05:24 -06:00
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#define get_errorlog_buffer() kmalloc(RTAS_ERROR_LOG_MAX, GFP_KERNEL)
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#else /* CONFIG_RTAS_ERROR_LOGGING */
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#define __fetch_rtas_last_error(x) NULL
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#define get_errorlog_buffer() NULL
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#endif
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2005-04-16 16:20:36 -06:00
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int rtas_call(int token, int nargs, int nret, int *outputs, ...)
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{
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va_list list;
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2005-10-26 01:05:24 -06:00
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int i;
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2005-04-16 16:20:36 -06:00
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unsigned long s;
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struct rtas_args *rtas_args;
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2005-10-26 01:05:24 -06:00
|
|
|
char *buff_copy = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
/* Gotta do something different here, use global lock for now... */
|
|
|
|
spin_lock_irqsave(&rtas.lock, s);
|
|
|
|
rtas_args = &rtas.args;
|
|
|
|
|
|
|
|
rtas_args->token = token;
|
|
|
|
rtas_args->nargs = nargs;
|
|
|
|
rtas_args->nret = nret;
|
|
|
|
rtas_args->rets = (rtas_arg_t *)&(rtas_args->args[nargs]);
|
|
|
|
va_start(list, outputs);
|
2005-10-26 01:05:24 -06:00
|
|
|
for (i = 0; i < nargs; ++i)
|
2005-04-16 16:20:36 -06:00
|
|
|
rtas_args->args[i] = va_arg(list, rtas_arg_t);
|
|
|
|
va_end(list);
|
|
|
|
|
|
|
|
for (i = 0; i < nret; ++i)
|
|
|
|
rtas_args->rets[i] = 0;
|
|
|
|
|
|
|
|
enter_rtas(__pa(rtas_args));
|
|
|
|
|
|
|
|
/* A -1 return code indicates that the last command couldn't
|
|
|
|
be completed due to a hardware error. */
|
|
|
|
if (rtas_args->rets[0] == -1)
|
2005-10-26 01:05:24 -06:00
|
|
|
buff_copy = __fetch_rtas_last_error(NULL);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (nret > 1 && outputs != NULL)
|
|
|
|
for (i = 0; i < nret-1; ++i)
|
|
|
|
outputs[i] = rtas_args->rets[i+1];
|
|
|
|
ret = (nret > 0)? rtas_args->rets[0]: 0;
|
|
|
|
|
|
|
|
/* Gotta do something different here, use global lock for now... */
|
|
|
|
spin_unlock_irqrestore(&rtas.lock, s);
|
|
|
|
|
|
|
|
if (buff_copy) {
|
|
|
|
log_error(buff_copy, ERR_TYPE_RTAS_LOG, 0);
|
|
|
|
if (mem_init_done)
|
|
|
|
kfree(buff_copy);
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Given an RTAS status code of 990n compute the hinted delay of 10^n
|
|
|
|
* (last digit) milliseconds. For now we bound at n=5 (100 sec).
|
|
|
|
*/
|
2005-10-26 01:05:24 -06:00
|
|
|
unsigned int rtas_extended_busy_delay_time(int status)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
int order = status - 9900;
|
|
|
|
unsigned long ms;
|
|
|
|
|
|
|
|
if (order < 0)
|
|
|
|
order = 0; /* RTC depends on this for -2 clock busy */
|
|
|
|
else if (order > 5)
|
|
|
|
order = 5; /* bound */
|
|
|
|
|
|
|
|
/* Use microseconds for reasonable accuracy */
|
2005-10-26 01:05:24 -06:00
|
|
|
for (ms = 1; order > 0; order--)
|
2005-04-16 16:20:36 -06:00
|
|
|
ms *= 10;
|
|
|
|
|
|
|
|
return ms;
|
|
|
|
}
|
|
|
|
|
|
|
|
int rtas_error_rc(int rtas_rc)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
switch (rtas_rc) {
|
|
|
|
case -1: /* Hardware Error */
|
|
|
|
rc = -EIO;
|
|
|
|
break;
|
|
|
|
case -3: /* Bad indicator/domain/etc */
|
|
|
|
rc = -EINVAL;
|
|
|
|
break;
|
|
|
|
case -9000: /* Isolation error */
|
|
|
|
rc = -EFAULT;
|
|
|
|
break;
|
|
|
|
case -9001: /* Outstanding TCE/PTE */
|
|
|
|
rc = -EEXIST;
|
|
|
|
break;
|
|
|
|
case -9002: /* No usable slot */
|
|
|
|
rc = -ENODEV;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printk(KERN_ERR "%s: unexpected RTAS error %d\n",
|
|
|
|
__FUNCTION__, rtas_rc);
|
|
|
|
rc = -ERANGE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int rtas_get_power_level(int powerdomain, int *level)
|
|
|
|
{
|
|
|
|
int token = rtas_token("get-power-level");
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
while ((rc = rtas_call(token, 1, 2, level, powerdomain)) == RTAS_BUSY)
|
|
|
|
udelay(1);
|
|
|
|
|
|
|
|
if (rc < 0)
|
|
|
|
return rtas_error_rc(rc);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int rtas_set_power_level(int powerdomain, int level, int *setlevel)
|
|
|
|
{
|
|
|
|
int token = rtas_token("set-power-level");
|
|
|
|
unsigned int wait_time;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
rc = rtas_call(token, 2, 2, setlevel, powerdomain, level);
|
|
|
|
if (rc == RTAS_BUSY)
|
|
|
|
udelay(1);
|
|
|
|
else if (rtas_is_extended_busy(rc)) {
|
|
|
|
wait_time = rtas_extended_busy_delay_time(rc);
|
|
|
|
udelay(wait_time * 1000);
|
|
|
|
} else
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc < 0)
|
|
|
|
return rtas_error_rc(rc);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int rtas_get_sensor(int sensor, int index, int *state)
|
|
|
|
{
|
|
|
|
int token = rtas_token("get-sensor-state");
|
|
|
|
unsigned int wait_time;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
rc = rtas_call(token, 2, 2, state, sensor, index);
|
|
|
|
if (rc == RTAS_BUSY)
|
|
|
|
udelay(1);
|
|
|
|
else if (rtas_is_extended_busy(rc)) {
|
|
|
|
wait_time = rtas_extended_busy_delay_time(rc);
|
|
|
|
udelay(wait_time * 1000);
|
|
|
|
} else
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc < 0)
|
|
|
|
return rtas_error_rc(rc);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
int rtas_set_indicator(int indicator, int index, int new_value)
|
|
|
|
{
|
|
|
|
int token = rtas_token("set-indicator");
|
|
|
|
unsigned int wait_time;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
if (token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -ENOENT;
|
|
|
|
|
|
|
|
while (1) {
|
|
|
|
rc = rtas_call(token, 3, 1, NULL, indicator, index, new_value);
|
|
|
|
if (rc == RTAS_BUSY)
|
|
|
|
udelay(1);
|
|
|
|
else if (rtas_is_extended_busy(rc)) {
|
|
|
|
wait_time = rtas_extended_busy_delay_time(rc);
|
|
|
|
udelay(wait_time * 1000);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rc < 0)
|
|
|
|
return rtas_error_rc(rc);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
2005-10-26 01:05:24 -06:00
|
|
|
void rtas_restart(char *cmd)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-11-02 20:41:19 -07:00
|
|
|
if (rtas_flash_term_hook)
|
|
|
|
rtas_flash_term_hook(SYS_RESTART);
|
2005-04-16 16:20:36 -06:00
|
|
|
printk("RTAS system-reboot returned %d\n",
|
|
|
|
rtas_call(rtas_token("system-reboot"), 0, 1, NULL));
|
|
|
|
for (;;);
|
|
|
|
}
|
|
|
|
|
2005-10-26 01:05:24 -06:00
|
|
|
void rtas_power_off(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-11-02 20:41:19 -07:00
|
|
|
if (rtas_flash_term_hook)
|
|
|
|
rtas_flash_term_hook(SYS_POWER_OFF);
|
2005-04-16 16:20:36 -06:00
|
|
|
/* allow power on only with power button press */
|
|
|
|
printk("RTAS power-off returned %d\n",
|
|
|
|
rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
|
|
|
|
for (;;);
|
|
|
|
}
|
|
|
|
|
2005-10-26 01:05:24 -06:00
|
|
|
void rtas_halt(void)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2005-11-02 20:41:19 -07:00
|
|
|
if (rtas_flash_term_hook)
|
|
|
|
rtas_flash_term_hook(SYS_HALT);
|
|
|
|
/* allow power on only with power button press */
|
|
|
|
printk("RTAS power-off returned %d\n",
|
|
|
|
rtas_call(rtas_token("power-off"), 2, 1, NULL, -1, -1));
|
|
|
|
for (;;);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Must be in the RMO region, so we place it here */
|
|
|
|
static char rtas_os_term_buf[2048];
|
|
|
|
|
|
|
|
void rtas_os_term(char *str)
|
|
|
|
{
|
|
|
|
int status;
|
|
|
|
|
|
|
|
if (RTAS_UNKNOWN_SERVICE == rtas_token("ibm,os-term"))
|
|
|
|
return;
|
|
|
|
|
|
|
|
snprintf(rtas_os_term_buf, 2048, "OS panic: %s", str);
|
|
|
|
|
|
|
|
do {
|
|
|
|
status = rtas_call(rtas_token("ibm,os-term"), 1, 1, NULL,
|
|
|
|
__pa(rtas_os_term_buf));
|
|
|
|
|
|
|
|
if (status == RTAS_BUSY)
|
|
|
|
udelay(1);
|
|
|
|
else if (status != 0)
|
|
|
|
printk(KERN_EMERG "ibm,os-term call failed %d\n",
|
|
|
|
status);
|
|
|
|
} while (status == RTAS_BUSY);
|
|
|
|
}
|
|
|
|
|
2006-01-13 17:39:24 -07:00
|
|
|
static int ibm_suspend_me_token = RTAS_UNKNOWN_SERVICE;
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
|
|
static void rtas_percpu_suspend_me(void *info)
|
|
|
|
{
|
2006-02-03 00:18:39 -07:00
|
|
|
int i;
|
2006-01-13 17:39:24 -07:00
|
|
|
long rc;
|
|
|
|
long flags;
|
|
|
|
struct rtas_suspend_me_data *data =
|
|
|
|
(struct rtas_suspend_me_data *)info;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* We use "waiting" to indicate our state. As long
|
|
|
|
* as it is >0, we are still trying to all join up.
|
|
|
|
* If it goes to 0, we have successfully joined up and
|
|
|
|
* one thread got H_Continue. If any error happens,
|
|
|
|
* we set it to <0.
|
|
|
|
*/
|
|
|
|
local_irq_save(flags);
|
|
|
|
do {
|
|
|
|
rc = plpar_hcall_norets(H_JOIN);
|
|
|
|
smp_rmb();
|
|
|
|
} while (rc == H_Success && data->waiting > 0);
|
|
|
|
if (rc == H_Success)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (rc == H_Continue) {
|
|
|
|
data->waiting = 0;
|
2006-02-03 00:18:46 -07:00
|
|
|
data->args->args[data->args->nargs] =
|
|
|
|
rtas_call(ibm_suspend_me_token, 0, 1, NULL);
|
2006-02-03 00:18:39 -07:00
|
|
|
for_each_cpu(i)
|
|
|
|
plpar_hcall_norets(H_PROD,i);
|
2006-01-13 17:39:24 -07:00
|
|
|
} else {
|
|
|
|
data->waiting = -EBUSY;
|
|
|
|
printk(KERN_ERR "Error on H_Join hypervisor call\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
local_irq_restore(flags);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int rtas_ibm_suspend_me(struct rtas_args *args)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
struct rtas_suspend_me_data data;
|
|
|
|
|
|
|
|
data.waiting = 1;
|
|
|
|
data.args = args;
|
|
|
|
|
|
|
|
/* Call function on all CPUs. One of us will make the
|
|
|
|
* rtas call
|
|
|
|
*/
|
|
|
|
if (on_each_cpu(rtas_percpu_suspend_me, &data, 1, 0))
|
|
|
|
data.waiting = -EINVAL;
|
|
|
|
|
|
|
|
if (data.waiting != 0)
|
|
|
|
printk(KERN_ERR "Error doing global join\n");
|
|
|
|
|
|
|
|
/* Prod each CPU. This won't hurt, and will wake
|
|
|
|
* anyone we successfully put to sleep with H_Join
|
|
|
|
*/
|
|
|
|
for_each_cpu(i)
|
|
|
|
plpar_hcall_norets(H_PROD, i);
|
|
|
|
|
|
|
|
return data.waiting;
|
|
|
|
}
|
|
|
|
#else /* CONFIG_PPC_PSERIES */
|
|
|
|
static int rtas_ibm_suspend_me(struct rtas_args *args)
|
|
|
|
{
|
|
|
|
return -ENOSYS;
|
|
|
|
}
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
|
|
|
|
{
|
|
|
|
struct rtas_args args;
|
|
|
|
unsigned long flags;
|
2005-10-26 01:05:24 -06:00
|
|
|
char *buff_copy, *errbuf = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
int nargs;
|
2006-01-13 17:39:24 -07:00
|
|
|
int rc;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
|
|
return -EPERM;
|
|
|
|
|
|
|
|
if (copy_from_user(&args, uargs, 3 * sizeof(u32)) != 0)
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
nargs = args.nargs;
|
|
|
|
if (nargs > ARRAY_SIZE(args.args)
|
|
|
|
|| args.nret > ARRAY_SIZE(args.args)
|
|
|
|
|| nargs + args.nret > ARRAY_SIZE(args.args))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* Copy in args. */
|
|
|
|
if (copy_from_user(args.args, uargs->args,
|
|
|
|
nargs * sizeof(rtas_arg_t)) != 0)
|
|
|
|
return -EFAULT;
|
|
|
|
|
2006-01-13 17:39:24 -07:00
|
|
|
if (args.token == RTAS_UNKNOWN_SERVICE)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
/* Need to handle ibm,suspend_me call specially */
|
|
|
|
if (args.token == ibm_suspend_me_token) {
|
|
|
|
rc = rtas_ibm_suspend_me(&args);
|
|
|
|
if (rc)
|
|
|
|
return rc;
|
|
|
|
goto copy_return;
|
|
|
|
}
|
|
|
|
|
2005-10-26 01:05:24 -06:00
|
|
|
buff_copy = get_errorlog_buffer();
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
spin_lock_irqsave(&rtas.lock, flags);
|
|
|
|
|
|
|
|
rtas.args = args;
|
|
|
|
enter_rtas(__pa(&rtas.args));
|
|
|
|
args = rtas.args;
|
|
|
|
|
|
|
|
args.rets = &args.args[nargs];
|
|
|
|
|
|
|
|
/* A -1 return code indicates that the last command couldn't
|
|
|
|
be completed due to a hardware error. */
|
2005-10-26 01:05:24 -06:00
|
|
|
if (args.rets[0] == -1)
|
|
|
|
errbuf = __fetch_rtas_last_error(buff_copy);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&rtas.lock, flags);
|
|
|
|
|
|
|
|
if (buff_copy) {
|
2005-10-26 01:05:24 -06:00
|
|
|
if (errbuf)
|
|
|
|
log_error(errbuf, ERR_TYPE_RTAS_LOG, 0);
|
2005-04-16 16:20:36 -06:00
|
|
|
kfree(buff_copy);
|
|
|
|
}
|
|
|
|
|
2006-01-13 17:39:24 -07:00
|
|
|
copy_return:
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Copy out args. */
|
|
|
|
if (copy_to_user(uargs->args + nargs,
|
|
|
|
args.args + nargs,
|
|
|
|
args.nret * sizeof(rtas_arg_t)) != 0)
|
|
|
|
return -EFAULT;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* This version can't take the spinlock, because it never returns */
|
|
|
|
|
|
|
|
struct rtas_args rtas_stop_self_args = {
|
|
|
|
/* The token is initialized for real in setup_system() */
|
|
|
|
.token = RTAS_UNKNOWN_SERVICE,
|
|
|
|
.nargs = 0,
|
|
|
|
.nret = 1,
|
|
|
|
.rets = &rtas_stop_self_args.args[0],
|
|
|
|
};
|
|
|
|
|
|
|
|
void rtas_stop_self(void)
|
|
|
|
{
|
|
|
|
struct rtas_args *rtas_args = &rtas_stop_self_args;
|
|
|
|
|
|
|
|
local_irq_disable();
|
|
|
|
|
|
|
|
BUG_ON(rtas_args->token == RTAS_UNKNOWN_SERVICE);
|
|
|
|
|
|
|
|
printk("cpu %u (hwid %u) Ready to die...\n",
|
|
|
|
smp_processor_id(), hard_smp_processor_id());
|
|
|
|
enter_rtas(__pa(rtas_args));
|
|
|
|
|
|
|
|
panic("Alas, I survived.\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2006-01-09 16:10:13 -07:00
|
|
|
* Call early during boot, before mem init or bootmem, to retrieve the RTAS
|
2005-04-16 16:20:36 -06:00
|
|
|
* informations from the device-tree and allocate the RMO buffer for userland
|
|
|
|
* accesses.
|
|
|
|
*/
|
|
|
|
void __init rtas_initialize(void)
|
|
|
|
{
|
2005-10-26 01:05:24 -06:00
|
|
|
unsigned long rtas_region = RTAS_INSTANTIATE_MAX;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Get RTAS dev node and fill up our "rtas" structure with infos
|
|
|
|
* about it.
|
|
|
|
*/
|
|
|
|
rtas.dev = of_find_node_by_name(NULL, "rtas");
|
|
|
|
if (rtas.dev) {
|
|
|
|
u32 *basep, *entryp;
|
|
|
|
u32 *sizep;
|
|
|
|
|
|
|
|
basep = (u32 *)get_property(rtas.dev, "linux,rtas-base", NULL);
|
|
|
|
sizep = (u32 *)get_property(rtas.dev, "rtas-size", NULL);
|
|
|
|
if (basep != NULL && sizep != NULL) {
|
|
|
|
rtas.base = *basep;
|
|
|
|
rtas.size = *sizep;
|
|
|
|
entryp = (u32 *)get_property(rtas.dev, "linux,rtas-entry", NULL);
|
|
|
|
if (entryp == NULL) /* Ugh */
|
|
|
|
rtas.entry = rtas.base;
|
|
|
|
else
|
|
|
|
rtas.entry = *entryp;
|
|
|
|
} else
|
|
|
|
rtas.dev = NULL;
|
|
|
|
}
|
2005-10-26 01:05:24 -06:00
|
|
|
if (!rtas.dev)
|
|
|
|
return;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* If RTAS was found, allocate the RMO buffer for it and look for
|
|
|
|
* the stop-self token if any
|
|
|
|
*/
|
2005-10-26 01:05:24 -06:00
|
|
|
#ifdef CONFIG_PPC64
|
2006-01-13 17:39:24 -07:00
|
|
|
if (_machine == PLATFORM_PSERIES_LPAR) {
|
2005-10-26 01:05:24 -06:00
|
|
|
rtas_region = min(lmb.rmo_size, RTAS_INSTANTIATE_MAX);
|
2006-01-13 17:39:24 -07:00
|
|
|
ibm_suspend_me_token = rtas_token("ibm,suspend-me");
|
|
|
|
}
|
2005-10-26 01:05:24 -06:00
|
|
|
#endif
|
|
|
|
rtas_rmo_buf = lmb_alloc_base(RTAS_RMOBUF_MAX, PAGE_SIZE, rtas_region);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
2005-10-26 01:05:24 -06:00
|
|
|
rtas_stop_self_args.token = rtas_token("stop-self");
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif /* CONFIG_HOTPLUG_CPU */
|
2005-10-26 01:05:24 -06:00
|
|
|
#ifdef CONFIG_RTAS_ERROR_LOGGING
|
|
|
|
rtas_last_error_token = rtas_token("rtas-last-error");
|
|
|
|
#endif
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(rtas_token);
|
|
|
|
EXPORT_SYMBOL(rtas_call);
|
|
|
|
EXPORT_SYMBOL(rtas_data_buf);
|
|
|
|
EXPORT_SYMBOL(rtas_data_buf_lock);
|
|
|
|
EXPORT_SYMBOL(rtas_extended_busy_delay_time);
|
|
|
|
EXPORT_SYMBOL(rtas_get_sensor);
|
|
|
|
EXPORT_SYMBOL(rtas_get_power_level);
|
|
|
|
EXPORT_SYMBOL(rtas_set_power_level);
|
|
|
|
EXPORT_SYMBOL(rtas_set_indicator);
|