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c73fcc846c
The current scheme works on static interpretation of text names, which
is wrong.
The output-device setting, for example, must be resolved via an alias
or similar to a full path name to the console device.
Paths also contain an optional set of 'options', which starts with a
colon at the end of the path. The option area is used to specify
which of two serial ports ('a' or 'b') the path refers to when a
device node drives multiple ports. 'a' is assumed if the option
specification is missing.
This was caught by the UltraSPARC-T1 simulator. The 'output-device'
property was set to 'ttya' and we didn't pick upon the fact that this
is an OBP alias set to '/virtual-devices/console'. Instead we saw it
as the first serial console device, instead of the hypervisor console.
The infrastructure is now there to take advantage of this to resolve
the console correctly even in multi-head situations in fbcon too.
Thanks to Greg Onufer for the bug report.
Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
#ifndef _SPARC_PROM_H
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#define _SPARC_PROM_H
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#ifdef __KERNEL__
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/*
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* Definitions for talking to the Open Firmware PROM on
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* Power Macintosh computers.
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*
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
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* Updates for SPARC32 by David S. Miller
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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 <linux/types.h>
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#include <linux/proc_fs.h>
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#include <asm/atomic.h>
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#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 2
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#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
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#define of_compat_cmp(s1, s2, l) strncmp((s1), (s2), (l))
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#define of_prop_cmp(s1, s2) strcasecmp((s1), (s2))
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#define of_node_cmp(s1, s2) strcmp((s1), (s2))
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typedef u32 phandle;
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typedef u32 ihandle;
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struct property {
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char *name;
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int length;
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void *value;
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struct property *next;
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unsigned long _flags;
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unsigned int unique_id;
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};
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struct device_node {
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const char *name;
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const char *type;
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phandle node;
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char *path_component_name;
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char *full_name;
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struct property *properties;
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struct property *deadprops; /* removed properties */
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struct device_node *parent;
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struct device_node *child;
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struct device_node *sibling;
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struct device_node *next; /* next device of same type */
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struct device_node *allnext; /* next in list of all nodes */
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struct proc_dir_entry *pde; /* this node's proc directory */
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struct kref kref;
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unsigned long _flags;
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void *data;
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unsigned int unique_id;
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};
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#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
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#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
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extern int of_set_property(struct device_node *node, const char *name, void *val, int len);
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extern int of_getintprop_default(struct device_node *np,
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const char *name,
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int def);
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extern void prom_build_devicetree(void);
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/* Dummy ref counting routines - to be implemented later */
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static inline struct device_node *of_node_get(struct device_node *node)
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{
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return node;
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}
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static inline void of_node_put(struct device_node *node)
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{
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}
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/*
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* NB: This is here while we transition from using asm/prom.h
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* to linux/of.h
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*/
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#include <linux/of.h>
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extern struct device_node *of_console_device;
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extern char *of_console_path;
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extern char *of_console_options;
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#endif /* __KERNEL__ */
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#endif /* _SPARC_PROM_H */
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