xref: /openbmc/linux/arch/mips/pci/pci.c (revision b830f94f)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  * Copyright (C) 2003, 04, 11 Ralf Baechle (ralf@linux-mips.org)
5  * Copyright (C) 2011 Wind River Systems,
6  *   written by Ralf Baechle (ralf@linux-mips.org)
7  */
8 #include <linux/bug.h>
9 #include <linux/kernel.h>
10 #include <linux/mm.h>
11 #include <linux/memblock.h>
12 #include <linux/export.h>
13 #include <linux/init.h>
14 #include <linux/types.h>
15 #include <linux/pci.h>
16 #include <linux/of_address.h>
17 
18 #include <asm/cpu-info.h>
19 
20 unsigned long PCIBIOS_MIN_IO;
21 EXPORT_SYMBOL(PCIBIOS_MIN_IO);
22 
23 unsigned long PCIBIOS_MIN_MEM;
24 EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
25 
26 static int __init pcibios_set_cache_line_size(void)
27 {
28 	unsigned int lsize;
29 
30 	/*
31 	 * Set PCI cacheline size to that of the highest level in the
32 	 * cache hierarchy.
33 	 */
34 	lsize = cpu_dcache_line_size();
35 	lsize = cpu_scache_line_size() ? : lsize;
36 	lsize = cpu_tcache_line_size() ? : lsize;
37 
38 	BUG_ON(!lsize);
39 
40 	pci_dfl_cache_line_size = lsize >> 2;
41 
42 	pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
43 	return 0;
44 }
45 arch_initcall(pcibios_set_cache_line_size);
46 
47 void pci_resource_to_user(const struct pci_dev *dev, int bar,
48 			  const struct resource *rsrc, resource_size_t *start,
49 			  resource_size_t *end)
50 {
51 	phys_addr_t size = resource_size(rsrc);
52 
53 	*start = fixup_bigphys_addr(rsrc->start, size);
54 	*end = rsrc->start + size - 1;
55 }
56