]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/pci/pci_auto_common.c
2 * PCI auto-configuration library
4 * Author: Matt Porter <mporter@mvista.com>
6 * Copyright 2000 MontaVista Software Inc.
8 * Modifications for driver model:
9 * Copyright 2015 Google, Inc
10 * Written by Simon Glass <sjg@chromium.org>
12 * SPDX-License-Identifier: GPL-2.0+
20 void pciauto_region_init(struct pci_region
*res
)
23 * Avoid allocating PCI resources from address 0 -- this is illegal
24 * according to PCI 2.1 and moreover, this is known to cause Linux IDE
25 * drivers to fail. Use a reasonable starting value of 0x1000 instead.
27 res
->bus_lower
= res
->bus_start
? res
->bus_start
: 0x1000;
30 void pciauto_region_align(struct pci_region
*res
, pci_size_t size
)
32 res
->bus_lower
= ((res
->bus_lower
- 1) | (size
- 1)) + 1;
35 int pciauto_region_allocate(struct pci_region
*res
, pci_size_t size
,
45 addr
= ((res
->bus_lower
- 1) | (size
- 1)) + 1;
47 if (addr
- res
->bus_start
+ size
> res
->size
) {
48 debug("No room in resource");
52 res
->bus_lower
= addr
+ size
;
54 debug("address=0x%llx bus_lower=0x%llx", (unsigned long long)addr
,
55 (unsigned long long)res
->bus_lower
);
61 *bar
= (pci_addr_t
)-1;
65 static void pciauto_show_region(const char *name
, struct pci_region
*region
)
67 pciauto_region_init(region
);
68 debug("PCI Autoconfig: Bus %s region: [%llx-%llx],\n"
69 "\t\tPhysical Memory [%llx-%llxx]\n", name
,
70 (unsigned long long)region
->bus_start
,
71 (unsigned long long)(region
->bus_start
+ region
->size
- 1),
72 (unsigned long long)region
->phys_start
,
73 (unsigned long long)(region
->phys_start
+ region
->size
- 1));
76 void pciauto_config_init(struct pci_controller
*hose
)
82 hose
->pci_prefetch
= NULL
;
84 for (i
= 0; i
< hose
->region_count
; i
++) {
85 switch (hose
->regions
[i
].flags
) {
88 hose
->pci_io
->size
< hose
->regions
[i
].size
)
89 hose
->pci_io
= hose
->regions
+ i
;
93 hose
->pci_mem
->size
< hose
->regions
[i
].size
)
94 hose
->pci_mem
= hose
->regions
+ i
;
96 case (PCI_REGION_MEM
| PCI_REGION_PREFETCH
):
97 if (!hose
->pci_prefetch
||
98 hose
->pci_prefetch
->size
< hose
->regions
[i
].size
)
99 hose
->pci_prefetch
= hose
->regions
+ i
;
106 pciauto_show_region("Memory", hose
->pci_mem
);
107 if (hose
->pci_prefetch
)
108 pciauto_show_region("Prefetchable Mem", hose
->pci_prefetch
);
110 pciauto_show_region("I/O", hose
->pci_io
);