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Subject[PATCH 3/11] ppc64: Split out generic rtas code from pSeries_pci.c.
Date
BPA is using rtas for PCI but should not be confused by
pSeries code. This also avoids some #ifdefs. Other
platforms that want to use rtas_pci.c could create
their own platform_pci.c with platform specific fixups.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>

--

Makefile | 3
mpic.h | 3
pSeries_pci.c | 476 -------------------------------------------------------
rtas_pci.c | 495 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 506 insertions(+), 471 deletions(-)
--- linux-cg.orig/arch/ppc64/kernel/Makefile 2005-05-13 14:56:19.016994560 -0400
+++ linux-cg/arch/ppc64/kernel/Makefile 2005-05-13 15:00:05.111971888 -0400
@@ -32,13 +32,14 @@ obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram

obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
- xics.o rtas.o pSeries_setup.o pSeries_iommu.o
+ xics.o pSeries_setup.o pSeries_iommu.o

obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o
+obj-$(CONFIG_PPC_RTAS) += rtas.o rtas_pci.o
obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
obj-$(CONFIG_SCANLOG) += scanlog.o
obj-$(CONFIG_VIOPATH) += viopath.o
--- linux-cg.orig/arch/ppc64/kernel/mpic.h 2005-05-13 14:56:19.018994256 -0400
+++ linux-cg/arch/ppc64/kernel/mpic.h 2005-05-13 15:00:10.785908048 -0400
@@ -265,3 +265,6 @@ extern void mpic_send_ipi(unsigned int i
extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs);
/* This one gets to the primary mpic */
extern int mpic_get_irq(struct pt_regs *regs);
+
+/* global mpic for pSeries */
+extern struct mpic *pSeries_mpic;
--- linux-cg.orig/arch/ppc64/kernel/pSeries_pci.c 2005-05-13 14:57:09.556898776 -0400
+++ linux-cg/arch/ppc64/kernel/pSeries_pci.c 2005-05-13 15:00:10.786907896 -0400
@@ -1,13 +1,11 @@
/*
- * pSeries_pci.c
+ * arch/ppc64/kernel/pSeries_pci.c
*
* Copyright (C) 2001 Dave Engebretsen, IBM Corporation
* Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
*
* pSeries specific routines for PCI.
*
- * Based on code from pci.c and chrp_pci.c
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
@@ -23,430 +21,18 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/

+#include <linux/init.h>
+#include <linux/ioport.h>
#include <linux/kernel.h>
-#include <linux/threads.h>
#include <linux/pci.h>
#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/bootmem.h>

-#include <asm/io.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-#include <asm/prom.h>
-#include <asm/machdep.h>
#include <asm/pci-bridge.h>
-#include <asm/iommu.h>
-#include <asm/rtas.h>
+#include <asm/prom.h>

-#include "mpic.h"
#include "pci.h"

-/* RTAS tokens */
-static int read_pci_config;
-static int write_pci_config;
-static int ibm_read_pci_config;
-static int ibm_write_pci_config;
-
-static int s7a_workaround;
-
-extern struct mpic *pSeries_mpic;
-
-static int config_access_valid(struct device_node *dn, int where)
-{
- if (where < 256)
- return 1;
- if (where < 4096 && dn->pci_ext_config_space)
- return 1;
-
- return 0;
-}
-
-static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val)
-{
- int returnval = -1;
- unsigned long buid, addr;
- int ret;
-
- if (!dn)
- return PCIBIOS_DEVICE_NOT_FOUND;
- if (!config_access_valid(dn, where))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
- (dn->devfn << 8) | (where & 0xff);
- buid = dn->phb->buid;
- if (buid) {
- ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
- addr, buid >> 32, buid & 0xffffffff, size);
- } else {
- ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size);
- }
- *val = returnval;
-
- if (ret)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- if (returnval == EEH_IO_ERROR_VALUE(size)
- && eeh_dn_check_failure (dn, NULL))
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int rtas_pci_read_config(struct pci_bus *bus,
- unsigned int devfn,
- int where, int size, u32 *val)
-{
- struct device_node *busdn, *dn;
-
- if (bus->self)
- busdn = pci_device_to_OF_node(bus->self);
- else
- busdn = bus->sysdata; /* must be a phb */
-
- /* Search only direct children of the bus */
- for (dn = busdn->child; dn; dn = dn->sibling)
- if (dn->devfn == devfn)
- return rtas_read_config(dn, where, size, val);
- return PCIBIOS_DEVICE_NOT_FOUND;
-}
-
-static int rtas_write_config(struct device_node *dn, int where, int size, u32 val)
-{
- unsigned long buid, addr;
- int ret;
-
- if (!dn)
- return PCIBIOS_DEVICE_NOT_FOUND;
- if (!config_access_valid(dn, where))
- return PCIBIOS_BAD_REGISTER_NUMBER;
-
- addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
- (dn->devfn << 8) | (where & 0xff);
- buid = dn->phb->buid;
- if (buid) {
- ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val);
- } else {
- ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val);
- }
-
- if (ret)
- return PCIBIOS_DEVICE_NOT_FOUND;
-
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int rtas_pci_write_config(struct pci_bus *bus,
- unsigned int devfn,
- int where, int size, u32 val)
-{
- struct device_node *busdn, *dn;
-
- if (bus->self)
- busdn = pci_device_to_OF_node(bus->self);
- else
- busdn = bus->sysdata; /* must be a phb */
-
- /* Search only direct children of the bus */
- for (dn = busdn->child; dn; dn = dn->sibling)
- if (dn->devfn == devfn)
- return rtas_write_config(dn, where, size, val);
- return PCIBIOS_DEVICE_NOT_FOUND;
-}
-
-struct pci_ops rtas_pci_ops = {
- rtas_pci_read_config,
- rtas_pci_write_config
-};
-
-int is_python(struct device_node *dev)
-{
- char *model = (char *)get_property(dev, "model", NULL);
-
- if (model && strstr(model, "Python"))
- return 1;
-
- return 0;
-}
-
-static int get_phb_reg_prop(struct device_node *dev,
- unsigned int addr_size_words,
- struct reg_property64 *reg)
-{
- unsigned int *ui_ptr = NULL, len;
-
- /* Found a PHB, now figure out where his registers are mapped. */
- ui_ptr = (unsigned int *)get_property(dev, "reg", &len);
- if (ui_ptr == NULL)
- return 1;
-
- if (addr_size_words == 1) {
- reg->address = ((struct reg_property32 *)ui_ptr)->address;
- reg->size = ((struct reg_property32 *)ui_ptr)->size;
- } else {
- *reg = *((struct reg_property64 *)ui_ptr);
- }
-
- return 0;
-}
-
-static void python_countermeasures(struct device_node *dev,
- unsigned int addr_size_words)
-{
- struct reg_property64 reg_struct;
- void __iomem *chip_regs;
- volatile u32 val;
-
- if (get_phb_reg_prop(dev, addr_size_words, &reg_struct))
- return;
-
- /* Python's register file is 1 MB in size. */
- chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000);
-
- /*
- * Firmware doesn't always clear this bit which is critical
- * for good performance - Anton
- */
-
-#define PRG_CL_RESET_VALID 0x00010000
-
- val = in_be32(chip_regs + 0xf6030);
- if (val & PRG_CL_RESET_VALID) {
- printk(KERN_INFO "Python workaround: ");
- val &= ~PRG_CL_RESET_VALID;
- out_be32(chip_regs + 0xf6030, val);
- /*
- * We must read it back for changes to
- * take effect
- */
- val = in_be32(chip_regs + 0xf6030);
- printk("reg0: %x\n", val);
- }
-
- iounmap(chip_regs);
-}
-
-void __init init_pci_config_tokens (void)
-{
- read_pci_config = rtas_token("read-pci-config");
- write_pci_config = rtas_token("write-pci-config");
- ibm_read_pci_config = rtas_token("ibm,read-pci-config");
- ibm_write_pci_config = rtas_token("ibm,write-pci-config");
-}
-
-unsigned long __devinit get_phb_buid (struct device_node *phb)
-{
- int addr_cells;
- unsigned int *buid_vals;
- unsigned int len;
- unsigned long buid;
-
- if (ibm_read_pci_config == -1) return 0;
-
- /* PHB's will always be children of the root node,
- * or so it is promised by the current firmware. */
- if (phb->parent == NULL)
- return 0;
- if (phb->parent->parent)
- return 0;
-
- buid_vals = (unsigned int *) get_property(phb, "reg", &len);
- if (buid_vals == NULL)
- return 0;
-
- addr_cells = prom_n_addr_cells(phb);
- if (addr_cells == 1) {
- buid = (unsigned long) buid_vals[0];
- } else {
- buid = (((unsigned long)buid_vals[0]) << 32UL) |
- (((unsigned long)buid_vals[1]) & 0xffffffff);
- }
- return buid;
-}
-
-static int phb_set_bus_ranges(struct device_node *dev,
- struct pci_controller *phb)
-{
- int *bus_range;
- unsigned int len;
-
- bus_range = (int *) get_property(dev, "bus-range", &len);
- if (bus_range == NULL || len < 2 * sizeof(int)) {
- return 1;
- }
-
- phb->first_busno = bus_range[0];
- phb->last_busno = bus_range[1];
-
- return 0;
-}
-
-static int __devinit setup_phb(struct device_node *dev,
- struct pci_controller *phb,
- unsigned int addr_size_words)
-{
- pci_setup_pci_controller(phb);
-
- if (is_python(dev))
- python_countermeasures(dev, addr_size_words);
-
- if (phb_set_bus_ranges(dev, phb))
- return 1;
-
- phb->arch_data = dev;
- phb->ops = &rtas_pci_ops;
- phb->buid = get_phb_buid(dev);
-
- return 0;
-}
-
-static void __devinit add_linux_pci_domain(struct device_node *dev,
- struct pci_controller *phb,
- struct property *of_prop)
-{
- memset(of_prop, 0, sizeof(struct property));
- of_prop->name = "linux,pci-domain";
- of_prop->length = sizeof(phb->global_number);
- of_prop->value = (unsigned char *)&of_prop[1];
- memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number));
- prom_add_property(dev, of_prop);
-}
-
-static struct pci_controller * __init alloc_phb(struct device_node *dev,
- unsigned int addr_size_words)
-{
- struct pci_controller *phb;
- struct property *of_prop;
-
- phb = alloc_bootmem(sizeof(struct pci_controller));
- if (phb == NULL)
- return NULL;
-
- of_prop = alloc_bootmem(sizeof(struct property) +
- sizeof(phb->global_number));
- if (!of_prop)
- return NULL;
-
- if (setup_phb(dev, phb, addr_size_words))
- return NULL;
-
- add_linux_pci_domain(dev, phb, of_prop);
-
- return phb;
-}
-
-static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words)
-{
- struct pci_controller *phb;
-
- phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller),
- GFP_KERNEL);
- if (phb == NULL)
- return NULL;
-
- if (setup_phb(dev, phb, addr_size_words))
- return NULL;
-
- phb->is_dynamic = 1;
-
- /* TODO: linux,pci-domain? */
-
- return phb;
-}
-
-unsigned long __init find_and_init_phbs(void)
-{
- struct device_node *node;
- struct pci_controller *phb;
- unsigned int root_size_cells = 0;
- unsigned int index;
- unsigned int *opprop = NULL;
- struct device_node *root = of_find_node_by_path("/");
-
- if (ppc64_interrupt_controller == IC_OPEN_PIC) {
- opprop = (unsigned int *)get_property(root,
- "platform-open-pic", NULL);
- }
-
- root_size_cells = prom_n_size_cells(root);
-
- index = 0;
-
- for (node = of_get_next_child(root, NULL);
- node != NULL;
- node = of_get_next_child(root, node)) {
- if (node->type == NULL || strcmp(node->type, "pci") != 0)
- continue;
-
- phb = alloc_phb(node, root_size_cells);
- if (!phb)
- continue;
-
- pci_process_bridge_OF_ranges(phb, node);
- pci_setup_phb_io(phb, index == 0);
-
- if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) {
- int addr = root_size_cells * (index + 2) - 1;
- mpic_assign_isu(pSeries_mpic, index, opprop[addr]);
- }
-
- index++;
- }
-
- of_node_put(root);
- pci_devs_phb_init();
-
- /*
- * pci_probe_only and pci_assign_all_buses can be set via properties
- * in chosen.
- */
- if (of_chosen) {
- int *prop;
-
- prop = (int *)get_property(of_chosen, "linux,pci-probe-only",
- NULL);
- if (prop)
- pci_probe_only = *prop;
-
- prop = (int *)get_property(of_chosen,
- "linux,pci-assign-all-buses", NULL);
- if (prop)
- pci_assign_all_buses = *prop;
- }
-
- return 0;
-}
-
-struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn)
-{
- struct device_node *root = of_find_node_by_path("/");
- unsigned int root_size_cells = 0;
- struct pci_controller *phb;
- struct pci_bus *bus;
- int primary;
-
- root_size_cells = prom_n_size_cells(root);
-
- primary = list_empty(&hose_list);
- phb = alloc_phb_dynamic(dn, root_size_cells);
- if (!phb)
- return NULL;
-
- pci_process_bridge_OF_ranges(phb, dn);
-
- pci_setup_phb_io_dynamic(phb, primary);
- of_node_put(root);
-
- pci_devs_phb_init_dynamic(phb);
- phb->last_busno = 0xff;
- bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data);
- phb->bus = bus;
- phb->last_busno = bus->subordinate;
-
- return phb;
-}
-EXPORT_SYMBOL(init_phb_dynamic);
+static int __initdata s7a_workaround;

#if 0
void pcibios_name_device(struct pci_dev *dev)
@@ -474,7 +60,7 @@ void pcibios_name_device(struct pci_dev
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
#endif

-static void check_s7a(void)
+static void __init check_s7a(void)
{
struct device_node *root;
char *model;
@@ -488,56 +74,6 @@ static void check_s7a(void)
}
}

-/* RPA-specific bits for removing PHBs */
-int pcibios_remove_root_bus(struct pci_controller *phb)
-{
- struct pci_bus *b = phb->bus;
- struct resource *res;
- int rc, i;
-
- res = b->resource[0];
- if (!res->flags) {
- printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__,
- b->name);
- return 1;
- }
-
- rc = unmap_bus_range(b);
- if (rc) {
- printk(KERN_ERR "%s: failed to unmap IO on bus %s\n",
- __FUNCTION__, b->name);
- return 1;
- }
-
- if (release_resource(res)) {
- printk(KERN_ERR "%s: failed to release IO on bus %s\n",
- __FUNCTION__, b->name);
- return 1;
- }
-
- for (i = 1; i < 3; ++i) {
- res = b->resource[i];
- if (!res->flags && i == 0) {
- printk(KERN_ERR "%s: no MEM resource for PHB %s\n",
- __FUNCTION__, b->name);
- return 1;
- }
- if (res->flags && release_resource(res)) {
- printk(KERN_ERR
- "%s: failed to release IO %d on bus %s\n",
- __FUNCTION__, i, b->name);
- return 1;
- }
- }
-
- list_del(&phb->list_node);
- if (phb->is_dynamic)
- kfree(phb);
-
- return 0;
-}
-EXPORT_SYMBOL(pcibios_remove_root_bus);
-
static void __init pSeries_request_regions(void)
{
if (!isa_io_base)
--- linux-cg.orig/arch/ppc64/kernel/rtas_pci.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-cg/arch/ppc64/kernel/rtas_pci.c 2005-05-13 15:00:10.788907592 -0400
@@ -0,0 +1,495 @@
+/*
+ * arch/ppc64/kernel/rtas_pci.c
+ *
+ * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
+ * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * RTAS specific routines for PCI.
+ *
+ * Based on code from pci.c, chrp_pci.c and pSeries_pci.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/threads.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/rtas.h>
+
+#include "mpic.h"
+#include "pci.h"
+
+/* RTAS tokens */
+static int read_pci_config;
+static int write_pci_config;
+static int ibm_read_pci_config;
+static int ibm_write_pci_config;
+
+static int config_access_valid(struct device_node *dn, int where)
+{
+ if (where < 256)
+ return 1;
+ if (where < 4096 && dn->pci_ext_config_space)
+ return 1;
+
+ return 0;
+}
+
+static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val)
+{
+ int returnval = -1;
+ unsigned long buid, addr;
+ int ret;
+
+ if (!dn)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (!config_access_valid(dn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
+ (dn->devfn << 8) | (where & 0xff);
+ buid = dn->phb->buid;
+ if (buid) {
+ ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
+ addr, buid >> 32, buid & 0xffffffff, size);
+ } else {
+ ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size);
+ }
+ *val = returnval;
+
+ if (ret)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (returnval == EEH_IO_ERROR_VALUE(size)
+ && eeh_dn_check_failure (dn, NULL))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rtas_pci_read_config(struct pci_bus *bus,
+ unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ struct device_node *busdn, *dn;
+
+ if (bus->self)
+ busdn = pci_device_to_OF_node(bus->self);
+ else
+ busdn = bus->sysdata; /* must be a phb */
+
+ /* Search only direct children of the bus */
+ for (dn = busdn->child; dn; dn = dn->sibling)
+ if (dn->devfn == devfn)
+ return rtas_read_config(dn, where, size, val);
+ return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+static int rtas_write_config(struct device_node *dn, int where, int size, u32 val)
+{
+ unsigned long buid, addr;
+ int ret;
+
+ if (!dn)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ if (!config_access_valid(dn, where))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
+ (dn->devfn << 8) | (where & 0xff);
+ buid = dn->phb->buid;
+ if (buid) {
+ ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val);
+ } else {
+ ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val);
+ }
+
+ if (ret)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int rtas_pci_write_config(struct pci_bus *bus,
+ unsigned int devfn,
+ int where, int size, u32 val)
+{
+ struct device_node *busdn, *dn;
+
+ if (bus->self)
+ busdn = pci_device_to_OF_node(bus->self);
+ else
+ busdn = bus->sysdata; /* must be a phb */
+
+ /* Search only direct children of the bus */
+ for (dn = busdn->child; dn; dn = dn->sibling)
+ if (dn->devfn == devfn)
+ return rtas_write_config(dn, where, size, val);
+ return PCIBIOS_DEVICE_NOT_FOUND;
+}
+
+struct pci_ops rtas_pci_ops = {
+ rtas_pci_read_config,
+ rtas_pci_write_config
+};
+
+int is_python(struct device_node *dev)
+{
+ char *model = (char *)get_property(dev, "model", NULL);
+
+ if (model && strstr(model, "Python"))
+ return 1;
+
+ return 0;
+}
+
+static int get_phb_reg_prop(struct device_node *dev,
+ unsigned int addr_size_words,
+ struct reg_property64 *reg)
+{
+ unsigned int *ui_ptr = NULL, len;
+
+ /* Found a PHB, now figure out where his registers are mapped. */
+ ui_ptr = (unsigned int *)get_property(dev, "reg", &len);
+ if (ui_ptr == NULL)
+ return 1;
+
+ if (addr_size_words == 1) {
+ reg->address = ((struct reg_property32 *)ui_ptr)->address;
+ reg->size = ((struct reg_property32 *)ui_ptr)->size;
+ } else {
+ *reg = *((struct reg_property64 *)ui_ptr);
+ }
+
+ return 0;
+}
+
+static void python_countermeasures(struct device_node *dev,
+ unsigned int addr_size_words)
+{
+ struct reg_property64 reg_struct;
+ void __iomem *chip_regs;
+ volatile u32 val;
+
+ if (get_phb_reg_prop(dev, addr_size_words, &reg_struct))
+ return;
+
+ /* Python's register file is 1 MB in size. */
+ chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000);
+
+ /*
+ * Firmware doesn't always clear this bit which is critical
+ * for good performance - Anton
+ */
+
+#define PRG_CL_RESET_VALID 0x00010000
+
+ val = in_be32(chip_regs + 0xf6030);
+ if (val & PRG_CL_RESET_VALID) {
+ printk(KERN_INFO "Python workaround: ");
+ val &= ~PRG_CL_RESET_VALID;
+ out_be32(chip_regs + 0xf6030, val);
+ /*
+ * We must read it back for changes to
+ * take effect
+ */
+ val = in_be32(chip_regs + 0xf6030);
+ printk("reg0: %x\n", val);
+ }
+
+ iounmap(chip_regs);
+}
+
+void __init init_pci_config_tokens (void)
+{
+ read_pci_config = rtas_token("read-pci-config");
+ write_pci_config = rtas_token("write-pci-config");
+ ibm_read_pci_config = rtas_token("ibm,read-pci-config");
+ ibm_write_pci_config = rtas_token("ibm,write-pci-config");
+}
+
+unsigned long __devinit get_phb_buid (struct device_node *phb)
+{
+ int addr_cells;
+ unsigned int *buid_vals;
+ unsigned int len;
+ unsigned long buid;
+
+ if (ibm_read_pci_config == -1) return 0;
+
+ /* PHB's will always be children of the root node,
+ * or so it is promised by the current firmware. */
+ if (phb->parent == NULL)
+ return 0;
+ if (phb->parent->parent)
+ return 0;
+
+ buid_vals = (unsigned int *) get_property(phb, "reg", &len);
+ if (buid_vals == NULL)
+ return 0;
+
+ addr_cells = prom_n_addr_cells(phb);
+ if (addr_cells == 1) {
+ buid = (unsigned long) buid_vals[0];
+ } else {
+ buid = (((unsigned long)buid_vals[0]) << 32UL) |
+ (((unsigned long)buid_vals[1]) & 0xffffffff);
+ }
+ return buid;
+}
+
+static int phb_set_bus_ranges(struct device_node *dev,
+ struct pci_controller *phb)
+{
+ int *bus_range;
+ unsigned int len;
+
+ bus_range = (int *) get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ return 1;
+ }
+
+ phb->first_busno = bus_range[0];
+ phb->last_busno = bus_range[1];
+
+ return 0;
+}
+
+static int __devinit setup_phb(struct device_node *dev,
+ struct pci_controller *phb,
+ unsigned int addr_size_words)
+{
+ pci_setup_pci_controller(phb);
+
+ if (is_python(dev))
+ python_countermeasures(dev, addr_size_words);
+
+ if (phb_set_bus_ranges(dev, phb))
+ return 1;
+
+ phb->arch_data = dev;
+ phb->ops = &rtas_pci_ops;
+ phb->buid = get_phb_buid(dev);
+
+ return 0;
+}
+
+static void __devinit add_linux_pci_domain(struct device_node *dev,
+ struct pci_controller *phb,
+ struct property *of_prop)
+{
+ memset(of_prop, 0, sizeof(struct property));
+ of_prop->name = "linux,pci-domain";
+ of_prop->length = sizeof(phb->global_number);
+ of_prop->value = (unsigned char *)&of_prop[1];
+ memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number));
+ prom_add_property(dev, of_prop);
+}
+
+static struct pci_controller * __init alloc_phb(struct device_node *dev,
+ unsigned int addr_size_words)
+{
+ struct pci_controller *phb;
+ struct property *of_prop;
+
+ phb = alloc_bootmem(sizeof(struct pci_controller));
+ if (phb == NULL)
+ return NULL;
+
+ of_prop = alloc_bootmem(sizeof(struct property) +
+ sizeof(phb->global_number));
+ if (!of_prop)
+ return NULL;
+
+ if (setup_phb(dev, phb, addr_size_words))
+ return NULL;
+
+ add_linux_pci_domain(dev, phb, of_prop);
+
+ return phb;
+}
+
+static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words)
+{
+ struct pci_controller *phb;
+
+ phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller),
+ GFP_KERNEL);
+ if (phb == NULL)
+ return NULL;
+
+ if (setup_phb(dev, phb, addr_size_words))
+ return NULL;
+
+ phb->is_dynamic = 1;
+
+ /* TODO: linux,pci-domain? */
+
+ return phb;
+}
+
+unsigned long __init find_and_init_phbs(void)
+{
+ struct device_node *node;
+ struct pci_controller *phb;
+ unsigned int root_size_cells = 0;
+ unsigned int index;
+ unsigned int *opprop = NULL;
+ struct device_node *root = of_find_node_by_path("/");
+
+ if (ppc64_interrupt_controller == IC_OPEN_PIC) {
+ opprop = (unsigned int *)get_property(root,
+ "platform-open-pic", NULL);
+ }
+
+ root_size_cells = prom_n_size_cells(root);
+
+ index = 0;
+
+ for (node = of_get_next_child(root, NULL);
+ node != NULL;
+ node = of_get_next_child(root, node)) {
+ if (node->type == NULL || strcmp(node->type, "pci") != 0)
+ continue;
+
+ phb = alloc_phb(node, root_size_cells);
+ if (!phb)
+ continue;
+
+ pci_process_bridge_OF_ranges(phb, node);
+ pci_setup_phb_io(phb, index == 0);
+#ifdef CONFIG_PPC_PSERIES
+ if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) {
+ int addr = root_size_cells * (index + 2) - 1;
+ mpic_assign_isu(pSeries_mpic, index, opprop[addr]);
+ }
+#endif
+ index++;
+ }
+
+ of_node_put(root);
+ pci_devs_phb_init();
+
+ /*
+ * pci_probe_only and pci_assign_all_buses can be set via properties
+ * in chosen.
+ */
+ if (of_chosen) {
+ int *prop;
+
+ prop = (int *)get_property(of_chosen, "linux,pci-probe-only",
+ NULL);
+ if (prop)
+ pci_probe_only = *prop;
+
+ prop = (int *)get_property(of_chosen,
+ "linux,pci-assign-all-buses", NULL);
+ if (prop)
+ pci_assign_all_buses = *prop;
+ }
+
+ return 0;
+}
+
+struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn)
+{
+ struct device_node *root = of_find_node_by_path("/");
+ unsigned int root_size_cells = 0;
+ struct pci_controller *phb;
+ struct pci_bus *bus;
+ int primary;
+
+ root_size_cells = prom_n_size_cells(root);
+
+ primary = list_empty(&hose_list);
+ phb = alloc_phb_dynamic(dn, root_size_cells);
+ if (!phb)
+ return NULL;
+
+ pci_process_bridge_OF_ranges(phb, dn);
+
+ pci_setup_phb_io_dynamic(phb, primary);
+ of_node_put(root);
+
+ pci_devs_phb_init_dynamic(phb);
+ phb->last_busno = 0xff;
+ bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data);
+ phb->bus = bus;
+ phb->last_busno = bus->subordinate;
+
+ return phb;
+}
+EXPORT_SYMBOL(init_phb_dynamic);
+
+/* RPA-specific bits for removing PHBs */
+int pcibios_remove_root_bus(struct pci_controller *phb)
+{
+ struct pci_bus *b = phb->bus;
+ struct resource *res;
+ int rc, i;
+
+ res = b->resource[0];
+ if (!res->flags) {
+ printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__,
+ b->name);
+ return 1;
+ }
+
+ rc = unmap_bus_range(b);
+ if (rc) {
+ printk(KERN_ERR "%s: failed to unmap IO on bus %s\n",
+ __FUNCTION__, b->name);
+ return 1;
+ }
+
+ if (release_resource(res)) {
+ printk(KERN_ERR "%s: failed to release IO on bus %s\n",
+ __FUNCTION__, b->name);
+ return 1;
+ }
+
+ for (i = 1; i < 3; ++i) {
+ res = b->resource[i];
+ if (!res->flags && i == 0) {
+ printk(KERN_ERR "%s: no MEM resource for PHB %s\n",
+ __FUNCTION__, b->name);
+ return 1;
+ }
+ if (res->flags && release_resource(res)) {
+ printk(KERN_ERR
+ "%s: failed to release IO %d on bus %s\n",
+ __FUNCTION__, i, b->name);
+ return 1;
+ }
+ }
+
+ list_del(&phb->list_node);
+ if (phb->is_dynamic)
+ kfree(phb);
+
+ return 0;
+}
+EXPORT_SYMBOL(pcibios_remove_root_bus);
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