AMD fam10: Drop PCI_BUS_SEGN_BITS

All boards in tree use 0.  Looks like this is all work that was
never completed and tested.

We also have static setting sysconf.segbit=0 which would conflict
with PCI_BUS_SEGN_BITS>0.

Having PCI_BUS_SEGN_BITS>0 would also require PCI MMCONF support
to cover over 255 buses.

Change-Id: I060efc44d1560541473b01690c2e8192863c1eb5
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8554
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/arch/x86/include/arch/io.h

@@ -267,7 +267,7 @@ static inline pci_devfn_t pci_io_locate_device(unsigned pci_id, pci_devfn_t dev)
 
 static inline pci_devfn_t pci_locate_device(unsigned pci_id, pci_devfn_t dev)
 {
-	for(; dev <= PCI_DEV(255|(((1<<CONFIG_PCI_BUS_SEGN_BITS)-1)<<8), 31, 7); dev += PCI_DEV(0,0,1)) {
+	for(; dev <= PCI_DEV(255, 31, 7); dev += PCI_DEV(0,0,1)) {
 		unsigned int id;
 		id = pci_read_config32(dev, 0);
 		if (id == pci_id) {

src/device/Kconfig

@@ -259,10 +259,6 @@ config PCIEXP_CLK_PM
 	help
 	  Detect and enable Clock Power Management on PCIe.
 
-config PCI_BUS_SEGN_BITS
-	int
-	default 0
-
 config EARLY_PCI_BRIDGE
 	bool "Early PCI bridge"
 	depends on PCI

src/device/device_util.c

@@ -251,20 +251,11 @@ const char *dev_path(device_t dev)
 			memcpy(buffer, "Root Device", 12);
 			break;
 		case DEVICE_PATH_PCI:
-#if CONFIG_PCI_BUS_SEGN_BITS
-			snprintf(buffer, sizeof (buffer),
-				 "PCI: %04x:%02x:%02x.%01x",
-				 dev->bus->secondary >> 8,
-				 dev->bus->secondary & 0xff,
-				 PCI_SLOT(dev->path.pci.devfn),
-				 PCI_FUNC(dev->path.pci.devfn));
-#else
 			snprintf(buffer, sizeof (buffer),
 				 "PCI: %02x:%02x.%01x",
 				 dev->bus->secondary,
 				 PCI_SLOT(dev->path.pci.devfn),
 				 PCI_FUNC(dev->path.pci.devfn));
-#endif
 			break;
 		case DEVICE_PATH_PNP:
 			snprintf(buffer, sizeof (buffer), "PNP: %04x.%01x",
@@ -643,14 +634,8 @@ void report_resource_stored(device_t dev, struct resource *resource,
 	buf[0] = '\0';
 
 	if (resource->flags & IORESOURCE_PCI_BRIDGE) {
-#if CONFIG_PCI_BUS_SEGN_BITS
-		snprintf(buf, sizeof (buf),
-			 "bus %04x:%02x ", dev->bus->secondary >> 8,
-			dev->link_list->secondary & 0xff);
-#else
 		snprintf(buf, sizeof (buf),
 			 "bus %02x ", dev->link_list->secondary);
-#endif
 	}
 	printk(BIOS_DEBUG, "%s %02lx <- [0x%010llx - 0x%010llx] size 0x%08llx "
 	       "gran 0x%02x %s%s%s\n", dev_path(dev), resource->index,
@@ -855,19 +840,6 @@ void show_one_resource(int debug_level, struct device *dev,
 	end = resource_end(resource);
 	buf[0] = '\0';
 
-/*
-	if (resource->flags & IORESOURCE_BRIDGE) {
-#if CONFIG_PCI_BUS_SEGN_BITS
-		snprintf(buf, sizeof (buf), "bus %04x:%02x ",
-		         dev->bus->secondary >> 8,
-			 dev->link[0].secondary & 0xff);
-#else
-		snprintf(buf, sizeof (buf),
-		         "bus %02x ", dev->link[0].secondary);
-#endif
-	}
-*/
-
 	do_printk(debug_level, "%s %02lx <- [0x%010llx - 0x%010llx] "
 		  "size 0x%08llx gran 0x%02x %s%s%s\n", dev_path(dev),
 		  resource->index, base, end, resource->size, resource->gran,

src/device/pci_device.c

@@ -1090,12 +1090,7 @@ unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn,
 	struct device *old_devices;
 	struct device *child;
 
-#if CONFIG_PCI_BUS_SEGN_BITS
-	printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %04x:%02x\n",
-	       bus->secondary >> 8, bus->secondary & 0xff);
-#else
 	printk(BIOS_DEBUG, "PCI: pci_scan_bus for bus %02x\n", bus->secondary);
-#endif
 
 	/* Maximum sane devfn is 0xFF. */
 	if (max_devfn > 0xff) {

src/northbridge/amd/amdfam10/debug.c

@@ -33,11 +33,7 @@ static inline void print_debug_addr(const char *str, void *val)
 
 static void print_debug_pci_dev(u32 dev)
 {
-#if !CONFIG_PCI_BUS_SEGN_BITS
 	printk(BIOS_DEBUG, "PCI: %02x:%02x.%02x", (dev>>20) & 0xff, (dev>>15) & 0x1f, (dev>>12) & 0x7);
-#else
-	printk(BIOS_DEBUG, "PCI: %04x:%02x:%02x.%02x", (dev>>28) & 0x0f, (dev>>20) & 0xff, (dev>>15) & 0x1f, (dev>>12) & 0x7);
-#endif
 }
 
 static inline void print_pci_devices(void)

src/northbridge/amd/amdfam10/ht_config.c

@@ -76,27 +76,6 @@ void clear_config_map_reg(u32 nodeid, u32 linkn, u32 ht_c_index,
 	}
 }
 
-#if CONFIG_PCI_BUS_SEGN_BITS
-u32 check_segn(device_t dev, u32 segbusn, u32 nodes,
-			sys_info_conf_t *sysinfo)
-{
-	//check segbusn here, We need every node have the same segn
-	if ((segbusn & 0xff)>(0xe0-1)) {// use next segn
-		u32 segn = (segbusn >> 8) & 0x0f;
-		segn++;
-		segbusn = segn<<8;
-	}
-	if (segbusn>>8) {
-		u32 val;
-		val = pci_read_config32(dev, 0x160);
-		val &= ~(0xf<<25);
-		val |= (segbusn & 0xf00)<<(25-8);
-		pci_write_config32(dev, 0x160, val);
-	}
-
-	return segbusn;
-}
-#endif
 
 u32 get_ht_c_index(u32 nodeid, u32 linkn, sys_info_conf_t *sysinfo)
 {

src/northbridge/amd/amdfam10/ht_config.h

@@ -34,8 +34,6 @@ void set_config_map_reg(u32 nodeid, u32 linkn, u32 ht_c_index,
 				u32 nodes);
 void clear_config_map_reg(u32 nodeid, u32 linkn, u32 ht_c_index,
 					u32 busn_min, u32 busn_max, u32 nodes);
-u32 check_segn(device_t dev, u32 segbusn, u32 nodes,
-			sys_info_conf_t *sysinfo);
 
 void store_ht_c_conf_bus(u32 nodeid, u32 linkn, u32 ht_c_index,
 				u32 busn_min, u32 busn_max,

src/northbridge/amd/amdfam10/northbridge.c

@@ -167,7 +167,6 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
 		u32 max_bus;
 		u32 min_bus;
 		u32 busses;
-		u32 segn = max>>8;
 #if CONFIG_SB_HT_CHAIN_ON_BUS0 > 1
 		u32 busn = max&0xff;
 #endif
@@ -211,7 +210,7 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
 		else {
 			min_bus = ((busn>>3) + 1) << 3; // one node can have 8 link and segn is the same
 		}
-		max = min_bus | (segn<<8);
+		max = min_bus;
 	#else
 		//other ...
 		else {
@@ -221,7 +220,7 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
 #else
 		min_bus = ++max;
 #endif
-		max_bus = 0xfc | (segn<<8);
+		max_bus = 0xfc;
 
 		link->secondary = min_bus;
 		link->subordinate = max_bus;
@@ -299,10 +298,6 @@ static unsigned amdfam10_scan_chains(device_t dev, unsigned max)
 			max = amdfam10_scan_chain(dev, nodeid, link, is_sblink, max);
 	}
 
-#if CONFIG_PCI_BUS_SEGN_BITS
-	max = check_segn(dev, max, sysconf.nodes, &sysconf);
-#endif
-
 	for (link = dev->link_list; link; link = link->next) {
 		bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
 		if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 0) && is_sblink)