From bb8187d35f820671d6dd76700d77a6b55f95e2c5 Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Thu, 17 May 2012 19:06:13 -0400 Subject: 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 Cc: James Bottomley Cc: x86@kernel.org Acked-by: Ingo Molnar Acked-by: H. Peter Anvin Signed-off-by: Paul Gortmaker --- include/linux/mca-legacy.h | 66 ---------------------------------------------- 1 file changed, 66 deletions(-) delete mode 100644 include/linux/mca-legacy.h (limited to 'include/linux/mca-legacy.h') diff --git a/include/linux/mca-legacy.h b/include/linux/mca-legacy.h deleted file mode 100644 index 7a3aea84590..00000000000 --- a/include/linux/mca-legacy.h +++ /dev/null @@ -1,66 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8 -*- */ - -/* This is the function prototypes for the old legacy MCA interface - * - * Please move your driver to the new sysfs based one instead */ - -#ifndef _LINUX_MCA_LEGACY_H -#define _LINUX_MCA_LEGACY_H - -#include - -#warning "MCA legacy - please move your driver to the new sysfs api" - -/* MCA_NOTFOUND is an error condition. The other two indicate - * motherboard POS registers contain the adapter. They might be - * returned by the mca_find_adapter() function, and can be used as - * arguments to mca_read_stored_pos(). I'm not going to allow direct - * access to the motherboard registers until we run across an adapter - * that requires it. We don't know enough about them to know if it's - * safe. - * - * See Documentation/mca.txt or one of the existing drivers for - * more information. - */ -#define MCA_NOTFOUND (-1) - - - -/* Returns the slot of the first enabled adapter matching id. User can - * specify a starting slot beyond zero, to deal with detecting multiple - * devices. Returns MCA_NOTFOUND if id not found. Also checks the - * integrated adapters. - */ -extern int mca_find_adapter(int id, int start); -extern int mca_find_unused_adapter(int id, int start); - -extern int mca_mark_as_used(int slot); -extern void mca_mark_as_unused(int slot); - -/* gets a byte out of POS register (stored in memory) */ -extern unsigned char mca_read_stored_pos(int slot, int reg); - -/* This can be expanded later. Right now, it gives us a way of - * getting meaningful information into the MCA_info structure, - * so we can have a more interesting /proc/mca. - */ -extern void mca_set_adapter_name(int slot, char* name); - -/* These routines actually mess with the hardware POS registers. They - * temporarily disable the device (and interrupts), so make sure you know - * what you're doing if you use them. Furthermore, writing to a POS may - * result in two devices trying to share a resource, which in turn can - * result in multiple devices sharing memory spaces, IRQs, or even trashing - * hardware. YOU HAVE BEEN WARNED. - * - * You can only access slots with this. Motherboard registers are off - * limits. - */ - -/* read a byte from the specified POS register. */ -extern unsigned char mca_read_pos(int slot, int reg); - -/* write a byte to the specified POS register. */ -extern void mca_write_pos(int slot, int reg, unsigned char byte); - -#endif -- cgit v1.2.3-70-g09d2