+// SPDX-License-Identifier: GPL-2.0+
/*
* PCI auto-configuration library
*
* 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 <log.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.
+ * drivers to fail. Use a reasonable starting value of 0x1000 instead
+ * if the bus start address is below 0x1000.
*/
- res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
+ res->bus_lower = res->bus_start < 0x1000 ? 0x1000 : res->bus_start;
}
void pciauto_region_align(struct pci_region *res, pci_size_t size)
}
int pciauto_region_allocate(struct pci_region *res, pci_size_t size,
- pci_addr_t *bar)
+ pci_addr_t *bar, bool supports_64bit)
{
pci_addr_t addr;
if (!res) {
- debug("No resource");
+ debug("No resource\n");
goto error;
}
addr = ((res->bus_lower - 1) | (size - 1)) + 1;
if (addr - res->bus_start + size > res->size) {
- debug("No room in resource");
+ debug("No room in resource, avail start=%llx / size=%llx, "
+ "need=%llx\n", (unsigned long long)res->bus_lower,
+ (unsigned long long)res->size, (unsigned long long)size);
+ goto error;
+ }
+
+ if (upper_32_bits(addr) && !supports_64bit) {
+ debug("Cannot assign 64-bit address to 32-bit-only resource\n");
goto error;
}
res->bus_lower = addr + size;
- debug("address=0x%llx bus_lower=0x%llx", (unsigned long long)addr,
+ debug("address=0x%llx bus_lower=0x%llx\n", (unsigned long long)addr,
(unsigned long long)res->bus_lower);
*bar = addr;
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-%llx]\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;
}
- if (hose->pci_mem) {
- pciauto_region_init(hose->pci_mem);
-
- debug("PCI Autoconfig: Bus Memory region: [0x%llx-0x%llx],\n"
- "\t\tPhysical Memory [%llx-%llxx]\n",
- (u64)hose->pci_mem->bus_start,
- (u64)(hose->pci_mem->bus_start + hose->pci_mem->size - 1),
- (u64)hose->pci_mem->phys_start,
- (u64)(hose->pci_mem->phys_start + hose->pci_mem->size - 1));
- }
-
- if (hose->pci_prefetch) {
- pciauto_region_init(hose->pci_prefetch);
-
- debug("PCI Autoconfig: Bus Prefetchable Mem: [0x%llx-0x%llx],\n"
- "\t\tPhysical Memory [%llx-%llx]\n",
- (u64)hose->pci_prefetch->bus_start,
- (u64)(hose->pci_prefetch->bus_start +
- hose->pci_prefetch->size - 1),
- (u64)hose->pci_prefetch->phys_start,
- (u64)(hose->pci_prefetch->phys_start +
- hose->pci_prefetch->size - 1));
- }
-
- if (hose->pci_io) {
- pciauto_region_init(hose->pci_io);
-
- debug("PCI Autoconfig: Bus I/O region: [0x%llx-0x%llx],\n"
- "\t\tPhysical Memory: [%llx-%llx]\n",
- (u64)hose->pci_io->bus_start,
- (u64)(hose->pci_io->bus_start + hose->pci_io->size - 1),
- (u64)hose->pci_io->phys_start,
- (u64)(hose->pci_io->phys_start + hose->pci_io->size - 1));
- }
+ 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);
}