diff --git a/CHANGELOG b/CHANGELOG
index c1da98fc510ff38ad2ab83cdfd3b759848990631..60d29aca79d72bca42096b6682c5b7c0c0e52249 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,16 @@
Changes since U-Boot 1.1.4:
======================================================================
+* Added support for PCI prefetchable region and BARs
+ If a host controller sets up a region as prefetchable and
+ a device's BAR denotes it as prefetchable, allocate the
+ BAR into the prefetch region.
+
+ If a BAR is prefetchable and no prefetchable region has
+ been setup by the controller we fall back to allocating
+ the BAR into the normally memory region.
+ Patch by Kumar Gala 11 Jan 2006
+
* Add support for 28F256J3A flah (=> 64 MB) on PM520 board
* Fix compiler problem with at91rm9200dk board.
diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c
index 3302457a3909dc1590d4a8961ddeb6a8c9200be0..15f74328f0a6a011c58cd425c56cb3a561dd1c98 100644
--- a/drivers/pci_auto.c
+++ b/drivers/pci_auto.c
@@ -77,6 +77,7 @@ int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned
void pciauto_setup_device(struct pci_controller *hose,
pci_dev_t dev, int bars_num,
struct pci_region *mem,
+ struct pci_region *prefetch,
struct pci_region *io)
{
unsigned int bar_value, bar_response, bar_size;
@@ -111,7 +112,10 @@ void pciauto_setup_device(struct pci_controller *hose,
found_mem64 = 1;
bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
- bar_res = mem;
+ if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
+ bar_res = prefetch;
+ else
+ bar_res = mem;
DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size);
}
@@ -148,6 +152,7 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus)
{
struct pci_region *pci_mem = hose->pci_mem;
+ struct pci_region *pci_prefetch = hose->pci_prefetch;
struct pci_region *pci_io = hose->pci_io;
unsigned int cmdstat;
@@ -169,6 +174,21 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
cmdstat |= PCI_COMMAND_MEMORY;
}
+ if (pci_prefetch) {
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_prefetch, 0x100000);
+
+ /* Set up memory and I/O filter limits, assume 32-bit I/O space */
+ pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE,
+ (pci_prefetch->bus_lower & 0xfff00000) >> 16);
+
+ cmdstat |= PCI_COMMAND_MEMORY;
+ } else {
+ /* We don't support prefetchable memory for now, so disable */
+ pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000);
+ pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x1000);
+ }
+
if (pci_io) {
/* Round I/O allocator to 4KB boundary */
pciauto_region_align(pci_io, 0x1000);
@@ -181,10 +201,6 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose,
cmdstat |= PCI_COMMAND_IO;
}
- /* We don't support prefetchable memory for now, so disable */
- pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_BASE, 0x1000);
- pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT, 0x1000);
-
/* Enable memory and I/O accesses, enable bus master */
pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat | PCI_COMMAND_MASTER);
}
@@ -193,6 +209,7 @@ static void pciauto_postscan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus)
{
struct pci_region *pci_mem = hose->pci_mem;
+ struct pci_region *pci_prefetch = hose->pci_prefetch;
struct pci_region *pci_io = hose->pci_io;
/* Configure bus number registers */
@@ -206,6 +223,14 @@ static void pciauto_postscan_setup_bridge(struct pci_controller *hose,
(pci_mem->bus_lower-1) >> 16);
}
+ if (pci_prefetch) {
+ /* Round memory allocator to 1MB boundary */
+ pciauto_region_align(pci_prefetch, 0x100000);
+
+ pci_hose_write_config_word(hose, dev, PCI_PREF_MEMORY_LIMIT,
+ (pci_prefetch->bus_lower-1) >> 16);
+ }
+
if (pci_io) {
/* Round I/O allocator to 4KB boundary */
pciauto_region_align(pci_io, 0x1000);
@@ -239,6 +264,11 @@ void pciauto_config_init(struct pci_controller *hose)
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;
}
}
@@ -251,6 +281,14 @@ void pciauto_config_init(struct pci_controller *hose)
hose->pci_mem->bus_start + hose->pci_mem->size - 1);
}
+ if (hose->pci_prefetch) {
+ pciauto_region_init(hose->pci_prefetch);
+
+ DEBUGF("PCI Autoconfig: Prefetchable Memory region: [%lx-%lx]\n",
+ hose->pci_prefetch->bus_start,
+ hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1);
+ }
+
if (hose->pci_io) {
pciauto_region_init(hose->pci_io);
@@ -275,7 +313,7 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
switch(class) {
case PCI_CLASS_BRIDGE_PCI:
hose->current_busno++;
- pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_io);
+ pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev));
@@ -301,12 +339,12 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
return sub_bus;
}
- pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_io);
+ pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
break;
case PCI_CLASS_BRIDGE_CARDBUS:
/* just do a minimal setup of the bridge, let the OS take care of the rest */
- pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_io);
+ pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
DEBUGF("PCI Autoconfig: Found P2CardBus bridge, device %d\n", PCI_DEV(dev));
@@ -328,11 +366,11 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev)
* the PIMMR window to be allocated (BAR0 - 1MB size)
*/
DEBUGF("PCI Autoconfig: Broken bridge found, only minimal config\n");
- pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_io);
+ pciauto_setup_device(hose, dev, 0, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
break;
#endif
default:
- pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_io);
+ pciauto_setup_device(hose, dev, 6, hose->pci_mem, hose->pci_prefetch, hose->pci_io);
break;
}
diff --git a/include/pci.h b/include/pci.h
index 8f19997559228d61b25dd84a883fd78fba635cfb..f78a769bb1f9e4f4f3dae0f9a8c418eabcad3767 100644
--- a/include/pci.h
+++ b/include/pci.h
@@ -309,6 +309,7 @@ struct pci_region {
#define PCI_REGION_MEM 0x00000000 /* PCI memory space */
#define PCI_REGION_IO 0x00000001 /* PCI IO space */
#define PCI_REGION_TYPE 0x00000001
+#define PCI_REGION_PREFETCH 0x00000008 /* prefetchable PCI memory */
#define PCI_REGION_MEMORY 0x00000100 /* System memory */
#define PCI_REGION_RO 0x00000200 /* Read-only memory */
@@ -386,7 +387,7 @@ struct pci_controller {
int (*write_dword)(struct pci_controller*, pci_dev_t, int where, u32);
/* Used by auto config */
- struct pci_region *pci_mem, *pci_io;
+ struct pci_region *pci_mem, *pci_io, *pci_prefetch;
/* Used by ppc405 autoconfig*/
struct pci_region *pci_fb;
@@ -472,6 +473,7 @@ extern int pciauto_region_allocate(struct pci_region* res, unsigned int size, un
extern void pciauto_setup_device(struct pci_controller *hose,
pci_dev_t dev, int bars_num,
struct pci_region *mem,
+ struct pci_region *prefetch,
struct pci_region *io);
int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev);