mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 21:51:40 +00:00
b962aeb022
MIPS has a copy of lib/iomap.c with minor alterations, none of which are
necessary given appropriate definitions of PIO_OFFSET, PIO_MASK &
PIO_RESERVED. Provide such definitions, select GENERIC_IOMAP & remove
arch/mips/lib/iomap.c to cut back on the needless duplication.
The one change this does make is to our mmio_{in,out}s[bwl] functions,
which began to deviate from their generic counterparts with commit
0845bb721e ("MIPS: iomap: Use __mem_{read,write}{b,w,l} for MMIO"). I
suspect that this commit was incorrect, and that the SEAD-3 platform
should have instead selected CONFIG_SWAP_IO_SPACE. Since the SEAD-3
platform code is now gone & the board is instead supported by the
generic platform (CONFIG_MIPS_GENERIC) which selects
CONFIG_SWAP_IO_SPACE anyway, this shouldn't be a problem any more.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20342/
Cc: linux-mips@linux-mips.org
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Implement the default iomap interfaces
|
|
*
|
|
* (C) Copyright 2004 Linus Torvalds
|
|
* (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
|
|
* (C) Copyright 2007 MIPS Technologies, Inc.
|
|
* written by Ralf Baechle <ralf@linux-mips.org>
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/export.h>
|
|
#include <asm/io.h>
|
|
|
|
#ifdef CONFIG_PCI_DRIVERS_LEGACY
|
|
|
|
void __iomem *__pci_ioport_map(struct pci_dev *dev,
|
|
unsigned long port, unsigned int nr)
|
|
{
|
|
struct pci_controller *ctrl = dev->bus->sysdata;
|
|
unsigned long base = ctrl->io_map_base;
|
|
|
|
/* This will eventually become a BUG_ON but for now be gentle */
|
|
if (unlikely(!ctrl->io_map_base)) {
|
|
struct pci_bus *bus = dev->bus;
|
|
char name[8];
|
|
|
|
while (bus->parent)
|
|
bus = bus->parent;
|
|
|
|
ctrl->io_map_base = base = mips_io_port_base;
|
|
|
|
sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
|
|
printk(KERN_WARNING "io_map_base of root PCI bus %s unset. "
|
|
"Trying to continue but you better\nfix this issue or "
|
|
"report it to linux-mips@linux-mips.org or your "
|
|
"vendor.\n", name);
|
|
#ifdef CONFIG_PCI_DOMAINS
|
|
panic("To avoid data corruption io_map_base MUST be set with "
|
|
"multiple PCI domains.");
|
|
#endif
|
|
}
|
|
|
|
return (void __iomem *) (ctrl->io_map_base + port);
|
|
}
|
|
|
|
#endif /* CONFIG_PCI_DRIVERS_LEGACY */
|