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authorPaul Gortmaker <paul.gortmaker@windriver.com>2012-05-17 19:06:13 -0400
committerPaul Gortmaker <paul.gortmaker@windriver.com>2012-05-17 19:06:13 -0400
commitbb8187d35f820671d6dd76700d77a6b55f95e2c5 (patch)
treeb699b184860cc7e9f2732c73d61ea92e3e2ad9e4 /include/linux/mca.h
parenta88dc06cd515b3bb9dfa18606e88d0be9a5b6ddd (diff)
MCA: delete all remaining traces of microchannel bus support.
Hardware with MCA bus is limited to 386 and 486 class machines that are now 20+ years old and typically with less than 32MB of memory. A quick search on the internet, and you see that even the MCA hobbyist/enthusiast community has lost interest in the early 2000 era and never really even moved ahead from the 2.4 kernels to the 2.6 series. This deletes anything remaining related to CONFIG_MCA from core kernel code and from the x86 architecture. There is no point in carrying this any further into the future. One complication to watch for is inadvertently scooping up stuff relating to machine check, since there is overlap in the TLA name space (e.g. arch/x86/boot/mca.c). Cc: Thomas Gleixner <tglx@linutronix.de> Cc: James Bottomley <JBottomley@Parallels.com> Cc: x86@kernel.org Acked-by: Ingo Molnar <mingo@elte.hu> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'include/linux/mca.h')
-rw-r--r--include/linux/mca.h148
1 files changed, 0 insertions, 148 deletions
diff --git a/include/linux/mca.h b/include/linux/mca.h
deleted file mode 100644
index 37972704617f..000000000000
--- a/include/linux/mca.h
+++ /dev/null
@@ -1,148 +0,0 @@
1/*
2 * Header for Microchannel Architecture Bus
3 * Written by Martin Kolinek, February 1996
4 */
5
6#ifndef _LINUX_MCA_H
7#define _LINUX_MCA_H
8
9#include <linux/device.h>
10
11#ifdef CONFIG_MCA
12#include <asm/mca.h>
13
14extern int MCA_bus;
15#else
16#define MCA_bus 0
17#endif
18
19/* This sets up an information callback for /proc/mca/slot?. The
20 * function is called with the buffer, slot, and device pointer (or
21 * some equally informative context information, or nothing, if you
22 * prefer), and is expected to put useful information into the
23 * buffer. The adapter name, id, and POS registers get printed
24 * before this is called though, so don't do it again.
25 *
26 * This should be called with a NULL procfn when a module
27 * unregisters, thus preventing kernel crashes and other such
28 * nastiness.
29 */
30typedef int (*MCA_ProcFn)(char* buf, int slot, void* dev);
31
32/* Should only be called by the NMI interrupt handler, this will do some
33 * fancy stuff to figure out what might have generated a NMI.
34 */
35extern void mca_handle_nmi(void);
36
37enum MCA_AdapterStatus {
38 MCA_ADAPTER_NORMAL = 0,
39 MCA_ADAPTER_NONE = 1,
40 MCA_ADAPTER_DISABLED = 2,
41 MCA_ADAPTER_ERROR = 3
42};
43
44struct mca_device {
45 u64 dma_mask;
46 int pos_id;
47 int slot;
48
49 /* index into id_table, set by the bus match routine */
50 int index;
51
52 /* is there a driver installed? 0 - No, 1 - Yes */
53 int driver_loaded;
54 /* POS registers */
55 unsigned char pos[8];
56 /* if a pseudo adapter of the motherboard, this is the motherboard
57 * register value to use for setup cycles */
58 short pos_register;
59
60 enum MCA_AdapterStatus status;
61#ifdef CONFIG_MCA_PROC_FS
62 /* name of the proc/mca file */
63 char procname[8];
64 /* /proc info callback */
65 MCA_ProcFn procfn;
66 /* device/context info for proc callback */
67 void *proc_dev;
68#endif
69 struct device dev;
70 char name[32];
71};
72#define to_mca_device(mdev) container_of(mdev, struct mca_device, dev)
73
74struct mca_bus_accessor_functions {
75 unsigned char (*mca_read_pos)(struct mca_device *, int reg);
76 void (*mca_write_pos)(struct mca_device *, int reg,
77 unsigned char byte);
78 int (*mca_transform_irq)(struct mca_device *, int irq);
79 int (*mca_transform_ioport)(struct mca_device *,
80 int region);
81 void * (*mca_transform_memory)(struct mca_device *,
82 void *memory);
83};
84
85struct mca_bus {
86 u64 default_dma_mask;
87 int number;
88 struct mca_bus_accessor_functions f;
89 struct device dev;
90 char name[32];
91};
92#define to_mca_bus(mdev) container_of(mdev, struct mca_bus, dev)
93
94struct mca_driver {
95 const short *id_table;
96 void *driver_data;
97 int integrated_id;
98 struct device_driver driver;
99};
100#define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
101
102/* Ongoing supported API functions */
103extern struct mca_device *mca_find_device_by_slot(int slot);
104extern int mca_system_init(void);
105extern struct mca_bus *mca_attach_bus(int);
106
107extern unsigned char mca_device_read_stored_pos(struct mca_device *mca_dev,
108 int reg);
109extern unsigned char mca_device_read_pos(struct mca_device *mca_dev, int reg);
110extern void mca_device_write_pos(struct mca_device *mca_dev, int reg,
111 unsigned char byte);
112extern int mca_device_transform_irq(struct mca_device *mca_dev, int irq);
113extern int mca_device_transform_ioport(struct mca_device *mca_dev, int port);
114extern void *mca_device_transform_memory(struct mca_device *mca_dev,
115 void *mem);
116extern int mca_device_claimed(struct mca_device *mca_dev);
117extern void mca_device_set_claim(struct mca_device *mca_dev, int val);
118extern void mca_device_set_name(struct mca_device *mca_dev, const char *name);
119static inline char *mca_device_get_name(struct mca_device *mca_dev)
120{
121 return mca_dev ? mca_dev->name : NULL;
122}
123
124extern enum MCA_AdapterStatus mca_device_status(struct mca_device *mca_dev);
125
126extern struct bus_type mca_bus_type;
127
128extern int mca_register_driver(struct mca_driver *drv);
129extern int mca_register_driver_integrated(struct mca_driver *, int);
130extern void mca_unregister_driver(struct mca_driver *drv);
131
132/* WARNING: only called by the boot time device setup */
133extern int mca_register_device(int bus, struct mca_device *mca_dev);
134
135#ifdef CONFIG_MCA_PROC_FS
136extern void mca_do_proc_init(void);
137extern void mca_set_adapter_procfn(int slot, MCA_ProcFn, void* dev);
138#else
139static inline void mca_do_proc_init(void)
140{
141}
142
143static inline void mca_set_adapter_procfn(int slot, MCA_ProcFn fn, void* dev)
144{
145}
146#endif
147
148#endif /* _LINUX_MCA_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-07 16:53:01 -0400