mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-25 19:38:52 +09:00
![Simon Glass](/assets/img/avatar_default.png)
Each region is displayed in almost the same way. Break out this common code into its own function. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Stephen Warren <swarren@nvidia.com>
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/*
|
|
* PCI auto-configuration library
|
|
*
|
|
* Author: Matt Porter <mporter@mvista.com>
|
|
*
|
|
* Copyright 2000 MontaVista Software Inc.
|
|
*
|
|
* Modifications for driver model:
|
|
* Copyright 2015 Google, Inc
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <pci.h>
|
|
|
|
void pciauto_region_init(struct pci_region *res)
|
|
{
|
|
/*
|
|
* Avoid allocating PCI resources from address 0 -- this is illegal
|
|
* according to PCI 2.1 and moreover, this is known to cause Linux IDE
|
|
* drivers to fail. Use a reasonable starting value of 0x1000 instead.
|
|
*/
|
|
res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
|
|
}
|
|
|
|
void pciauto_region_align(struct pci_region *res, pci_size_t size)
|
|
{
|
|
res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
|
|
}
|
|
|
|
int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
|
|
pci_addr_t *bar)
|
|
{
|
|
pci_addr_t addr;
|
|
|
|
if (!res) {
|
|
debug("No resource");
|
|
goto error;
|
|
}
|
|
|
|
addr = ((res->bus_lower - 1) | (size - 1)) + 1;
|
|
|
|
if (addr - res->bus_start + size > res->size) {
|
|
debug("No room in resource");
|
|
goto error;
|
|
}
|
|
|
|
res->bus_lower = addr + size;
|
|
|
|
debug("address=0x%llx bus_lower=0x%llx", (unsigned long long)addr,
|
|
(unsigned long long)res->bus_lower);
|
|
|
|
*bar = addr;
|
|
return 0;
|
|
|
|
error:
|
|
*bar = (pci_addr_t)-1;
|
|
return -1;
|
|
}
|
|
|
|
static void pciauto_show_region(const char *name, struct pci_region *region)
|
|
{
|
|
pciauto_region_init(region);
|
|
debug("PCI Autoconfig: Bus %s region: [%llx-%llx],\n"
|
|
"\t\tPhysical Memory [%llx-%llxx]\n", name,
|
|
(unsigned long long)region->bus_start,
|
|
(unsigned long long)(region->bus_start + region->size - 1),
|
|
(unsigned long long)region->phys_start,
|
|
(unsigned long long)(region->phys_start + region->size - 1));
|
|
}
|
|
|
|
void pciauto_config_init(struct pci_controller *hose)
|
|
{
|
|
int i;
|
|
|
|
hose->pci_io = NULL;
|
|
hose->pci_mem = NULL;
|
|
hose->pci_prefetch = NULL;
|
|
|
|
for (i = 0; i < hose->region_count; i++) {
|
|
switch (hose->regions[i].flags) {
|
|
case PCI_REGION_IO:
|
|
if (!hose->pci_io ||
|
|
hose->pci_io->size < hose->regions[i].size)
|
|
hose->pci_io = hose->regions + i;
|
|
break;
|
|
case PCI_REGION_MEM:
|
|
if (!hose->pci_mem ||
|
|
hose->pci_mem->size < hose->regions[i].size)
|
|
hose->pci_mem = hose->regions + i;
|
|
break;
|
|
case (PCI_REGION_MEM | PCI_REGION_PREFETCH):
|
|
if (!hose->pci_prefetch ||
|
|
hose->pci_prefetch->size < hose->regions[i].size)
|
|
hose->pci_prefetch = hose->regions + i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
if (hose->pci_mem)
|
|
pciauto_show_region("Memory", hose->pci_mem);
|
|
if (hose->pci_prefetch)
|
|
pciauto_show_region("Prefetchable Mem", hose->pci_prefetch);
|
|
if (hose->pci_io)
|
|
pciauto_show_region("I/O", hose->pci_io);
|
|
}
|