mirror of
https://github.com/brain-hackers/u-boot-brain
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* PCI auto-configuration library
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*
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* Author: Matt Porter <mporter@mvista.com>
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*
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* Copyright 2000 MontaVista Software Inc.
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*
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* Modifications for driver model:
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* Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <pci.h>
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void pciauto_region_init(struct pci_region *res)
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{
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/*
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* Avoid allocating PCI resources from address 0 -- this is illegal
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* according to PCI 2.1 and moreover, this is known to cause Linux IDE
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* drivers to fail. Use a reasonable starting value of 0x1000 instead.
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*/
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res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
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}
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void pciauto_region_align(struct pci_region *res, pci_size_t size)
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{
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res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
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}
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int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
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pci_addr_t *bar)
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{
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pci_addr_t addr;
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if (!res) {
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debug("No resource");
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goto error;
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}
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addr = ((res->bus_lower - 1) | (size - 1)) + 1;
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if (addr - res->bus_start + size > res->size) {
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debug("No room in resource");
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goto error;
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}
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res->bus_lower = addr + size;
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debug("address=0x%llx bus_lower=0x%llx", (unsigned long long)addr,
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(unsigned long long)res->bus_lower);
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*bar = addr;
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return 0;
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error:
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*bar = (pci_addr_t)-1;
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return -1;
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}
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static void pciauto_show_region(const char *name, struct pci_region *region)
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{
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pciauto_region_init(region);
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debug("PCI Autoconfig: Bus %s region: [%llx-%llx],\n"
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"\t\tPhysical Memory [%llx-%llxx]\n", name,
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(unsigned long long)region->bus_start,
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(unsigned long long)(region->bus_start + region->size - 1),
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(unsigned long long)region->phys_start,
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(unsigned long long)(region->phys_start + region->size - 1));
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}
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void pciauto_config_init(struct pci_controller *hose)
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{
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int i;
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hose->pci_io = NULL;
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hose->pci_mem = NULL;
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hose->pci_prefetch = NULL;
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for (i = 0; i < hose->region_count; i++) {
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switch (hose->regions[i].flags) {
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case PCI_REGION_IO:
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if (!hose->pci_io ||
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hose->pci_io->size < hose->regions[i].size)
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hose->pci_io = hose->regions + i;
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break;
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case PCI_REGION_MEM:
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if (!hose->pci_mem ||
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hose->pci_mem->size < hose->regions[i].size)
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hose->pci_mem = hose->regions + i;
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break;
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case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
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if (!hose->pci_prefetch ||
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hose->pci_prefetch->size < hose->regions[i].size)
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hose->pci_prefetch = hose->regions + i;
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break;
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}
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}
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if (hose->pci_mem)
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pciauto_show_region("Memory", hose->pci_mem);
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if (hose->pci_prefetch)
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pciauto_show_region("Prefetchable Mem", hose->pci_prefetch);
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if (hose->pci_io)
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pciauto_show_region("I/O", hose->pci_io);
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}
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