mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 00:15:51 +07:00
b03e5dcb94
Both functions don't do anything xtensa-specific and there are generic implementations for both. Drop both and use generic versions. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* arch/xtensa/kernel/pci.c
|
|
*
|
|
* PCI bios-type initialisation for PCI machines
|
|
*
|
|
* Copyright (C) 2001-2005 Tensilica Inc.
|
|
*
|
|
* Based largely on work from Cort (ppc/kernel/pci.c)
|
|
* IO functions copied from sparc.
|
|
*
|
|
* Chris Zankel <chris@zankel.net>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/string.h>
|
|
#include <linux/init.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/memblock.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/platform.h>
|
|
|
|
/*
|
|
* We need to avoid collisions with `mirrored' VGA ports
|
|
* and other strange ISA hardware, so we always want the
|
|
* addresses to be allocated in the 0x000-0x0ff region
|
|
* modulo 0x400.
|
|
*
|
|
* Why? Because some silly external IO cards only decode
|
|
* the low 10 bits of the IO address. The 0x00-0xff region
|
|
* is reserved for motherboard devices that decode all 16
|
|
* bits, so it's ok to allocate at, say, 0x2800-0x28ff,
|
|
* but we want to try to avoid allocating at 0x2900-0x2bff
|
|
* which might have be mirrored at 0x0100-0x03ff..
|
|
*/
|
|
resource_size_t
|
|
pcibios_align_resource(void *data, const struct resource *res,
|
|
resource_size_t size, resource_size_t align)
|
|
{
|
|
struct pci_dev *dev = data;
|
|
resource_size_t start = res->start;
|
|
|
|
if (res->flags & IORESOURCE_IO) {
|
|
if (size > 0x100) {
|
|
pr_err("PCI: I/O Region %s/%d too large (%u bytes)\n",
|
|
pci_name(dev), dev->resource - res,
|
|
size);
|
|
}
|
|
|
|
if (start & 0x300)
|
|
start = (start + 0x3ff) & ~0x3ff;
|
|
}
|
|
|
|
return start;
|
|
}
|
|
|
|
void pcibios_fixup_bus(struct pci_bus *bus)
|
|
{
|
|
if (bus->parent) {
|
|
/* This is a subordinate bridge */
|
|
pci_read_bridge_bases(bus);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Platform support for /proc/bus/pci/X/Y mmap()s.
|
|
* -- paulus.
|
|
*/
|
|
|
|
int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma)
|
|
{
|
|
struct pci_controller *pci_ctrl = (struct pci_controller*) pdev->sysdata;
|
|
resource_size_t ioaddr = pci_resource_start(pdev, bar);
|
|
|
|
if (pci_ctrl == 0)
|
|
return -EINVAL; /* should never happen */
|
|
|
|
/* Convert to an offset within this PCI controller */
|
|
ioaddr -= (unsigned long)pci_ctrl->io_space.base;
|
|
|
|
vma->vm_pgoff += (ioaddr + pci_ctrl->io_space.start) >> PAGE_SHIFT;
|
|
return 0;
|
|
}
|