Merge branch 'linus' into perf/urgent

Merge reason: we need to fix a non-trivial merge conflict.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

10 files changed, 57 insertions, 217 deletions

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index c8d6efb99dbf..11060fa87da3 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -14,6 +14,7 @@ config MICROBLAZE
 	select TRACING_SUPPORT
 	select OF
 	select OF_EARLY_FLATTREE
+	select IRQ_DOMAIN
 	select HAVE_GENERIC_HARDIRQS
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
diff --git a/arch/microblaze/include/asm/hardirq.h b/arch/microblaze/include/asm/hardirq.h
index cd1ac9aad56c..fb3c05a0cbbf 100644
--- a/arch/microblaze/include/asm/hardirq.h
+++ b/arch/microblaze/include/asm/hardirq.h
@@ -1,17 +1 @@
-/*
- * Copyright (C) 2006 Atmark Techno, Inc.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#ifndef _ASM_MICROBLAZE_HARDIRQ_H
-#define _ASM_MICROBLAZE_HARDIRQ_H
-
-/* should be defined in each interrupt controller driver */
-extern unsigned int get_irq(struct pt_regs *regs);
-
 #include <asm-generic/hardirq.h>
-
-#endif /* _ASM_MICROBLAZE_HARDIRQ_H */
diff --git a/arch/microblaze/include/asm/irq.h b/arch/microblaze/include/asm/irq.h
index a175132e4496..bab3b1393ad4 100644
--- a/arch/microblaze/include/asm/irq.h
+++ b/arch/microblaze/include/asm/irq.h
@@ -9,49 +9,13 @@
 #ifndef _ASM_MICROBLAZE_IRQ_H
 #define _ASM_MICROBLAZE_IRQ_H
 
-
-/*
- * Linux IRQ# is currently offset by one to map to the hardware
- * irq number. So hardware IRQ0 maps to Linux irq 1.
- */
-#define NO_IRQ_OFFSET	1
-#define IRQ_OFFSET	NO_IRQ_OFFSET
-#define NR_IRQS		(32 + IRQ_OFFSET)
+#define NR_IRQS		(32 + 1)
 #include <asm-generic/irq.h>
 
-/* This type is the placeholder for a hardware interrupt number. It has to
- * be big enough to enclose whatever representation is used by a given
- * platform.
- */
-typedef unsigned long irq_hw_number_t;
-
-extern unsigned int nr_irq;
-
 struct pt_regs;
 extern void do_IRQ(struct pt_regs *regs);
 
-/** FIXME - not implement
- * irq_dispose_mapping - Unmap an interrupt
- * @virq: linux virq number of the interrupt to unmap
- */
-static inline void irq_dispose_mapping(unsigned int virq)
-{
-	return;
-}
-
-struct irq_host;
-
-/**
- * irq_create_mapping - Map a hardware interrupt into linux virq space
- * @host: host owning this hardware interrupt or NULL for default host
- * @hwirq: hardware irq number in that host space
- *
- * Only one mapping per hardware interrupt is permitted. Returns a linux
- * virq number.
- * If the sense/trigger is to be specified, set_irq_type() should be called
- * on the number returned from that call.
- */
-extern unsigned int irq_create_mapping(struct irq_host *host,
-					irq_hw_number_t hwirq);
+/* should be defined in each interrupt controller driver */
+extern unsigned int get_irq(void);
 
 #endif /* _ASM_MICROBLAZE_IRQ_H */
diff --git a/arch/microblaze/include/asm/pci-bridge.h b/arch/microblaze/include/asm/pci-bridge.h
index e9834b2991d0..cb5d39794800 100644
--- a/arch/microblaze/include/asm/pci-bridge.h
+++ b/arch/microblaze/include/asm/pci-bridge.h
@@ -10,7 +10,6 @@
 #include <linux/pci.h>
 #include <linux/list.h>
 #include <linux/ioport.h>
-#include <asm-generic/pci-bridge.h>
 
 struct device_node;
 
diff --git a/arch/microblaze/include/asm/pci.h b/arch/microblaze/include/asm/pci.h
index 033137628e8a..a0da88bf70c5 100644
--- a/arch/microblaze/include/asm/pci.h
+++ b/arch/microblaze/include/asm/pci.h
@@ -94,14 +94,6 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  */
 #define PCI_DMA_BUS_IS_PHYS     (1)
 
-extern void pcibios_resource_to_bus(struct pci_dev *dev,
-			struct pci_bus_region *region,
-			struct resource *res);
-
-extern void pcibios_bus_to_resource(struct pci_dev *dev,
-			struct resource *res,
-			struct pci_bus_region *region);
-
 static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
 			struct resource *res)
 {
diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index b2af42311a12..44dc67aa0277 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -543,8 +543,6 @@ extern unsigned long iopa(unsigned long addr);
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 #define kern_addr_valid(addr)	(1)
 
-#define io_remap_page_range remap_page_range
-
 /*
  * No page table caches to initialise
  */
diff --git a/arch/microblaze/kernel/intc.c b/arch/microblaze/kernel/intc.c
index 44b177e2ab12..ad120672cee5 100644
--- a/arch/microblaze/kernel/intc.c
+++ b/arch/microblaze/kernel/intc.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/irqdomain.h>
 #include <linux/irq.h>
 #include <asm/page.h>
 #include <linux/io.h>
@@ -25,8 +26,6 @@ static unsigned int intc_baseaddr;
 #define INTC_BASE	intc_baseaddr
 #endif
 
-unsigned int nr_irq;
-
 /* No one else should require these constants, so define them locally here. */
 #define ISR 0x00			/* Interrupt Status Register */
 #define IPR 0x04			/* Interrupt Pending Register */
@@ -84,24 +83,45 @@ static struct irq_chip intc_dev = {
 	.irq_mask_ack = intc_mask_ack,
 };
 
-unsigned int get_irq(struct pt_regs *regs)
+static struct irq_domain *root_domain;
+
+unsigned int get_irq(void)
 {
-	int irq;
+	unsigned int hwirq, irq = -1;
 
-	/*
-	 * NOTE: This function is the one that needs to be improved in
-	 * order to handle multiple interrupt controllers. It currently
-	 * is hardcoded to check for interrupts only on the first INTC.
-	 */
-	irq = in_be32(INTC_BASE + IVR) + NO_IRQ_OFFSET;
-	pr_debug("get_irq: %d\n", irq);
+	hwirq = in_be32(INTC_BASE + IVR);
+	if (hwirq != -1U)
+		irq = irq_find_mapping(root_domain, hwirq);
+
+	pr_debug("get_irq: hwirq=%d, irq=%d\n", hwirq, irq);
 
 	return irq;
 }
 
+int xintc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+	u32 intr_mask = (u32)d->host_data;
+
+	if (intr_mask & (1 << hw)) {
+		irq_set_chip_and_handler_name(irq, &intc_dev,
+						handle_edge_irq, "edge");
+		irq_clear_status_flags(irq, IRQ_LEVEL);
+	} else {
+		irq_set_chip_and_handler_name(irq, &intc_dev,
+						handle_level_irq, "level");
+		irq_set_status_flags(irq, IRQ_LEVEL);
+	}
+	return 0;
+}
+
+static const struct irq_domain_ops xintc_irq_domain_ops = {
+	.xlate = irq_domain_xlate_onetwocell,
+	.map = xintc_map,
+};
+
 void __init init_IRQ(void)
 {
-	u32 i, intr_mask;
+	u32 nr_irq, intr_mask;
 	struct device_node *intc = NULL;
 #ifdef CONFIG_SELFMOD_INTC
 	unsigned int intc_baseaddr = 0;
@@ -146,16 +166,9 @@ void __init init_IRQ(void)
 	/* Turn on the Master Enable. */
 	out_be32(intc_baseaddr + MER, MER_HIE | MER_ME);
 
-	for (i = IRQ_OFFSET; i < (nr_irq + IRQ_OFFSET); ++i) {
-		if (intr_mask & (0x00000001 << (i - IRQ_OFFSET))) {
-			irq_set_chip_and_handler_name(i, &intc_dev,
-				handle_edge_irq, "edge");
-			irq_clear_status_flags(i, IRQ_LEVEL);
-		} else {
-			irq_set_chip_and_handler_name(i, &intc_dev,
-				handle_level_irq, "level");
-			irq_set_status_flags(i, IRQ_LEVEL);
-		}
-		irq_get_irq_data(i)->hwirq = i - IRQ_OFFSET;
-	}
+	/* Yeah, okay, casting the intr_mask to a void* is butt-ugly, but I'm
+	 * lazy and Michal can clean it up to something nicer when he tests
+	 * and commits this patch.  ~~gcl */
+	root_domain = irq_domain_add_linear(intc, nr_irq, &xintc_irq_domain_ops,
+							(void *)intr_mask);
 }
diff --git a/arch/microblaze/kernel/irq.c b/arch/microblaze/kernel/irq.c
index bbebcae72c02..ace700afbfdf 100644
--- a/arch/microblaze/kernel/irq.c
+++ b/arch/microblaze/kernel/irq.c
@@ -31,14 +31,13 @@ void __irq_entry do_IRQ(struct pt_regs *regs)
 	trace_hardirqs_off();
 
 	irq_enter();
-	irq = get_irq(regs);
+	irq = get_irq();
 next_irq:
 	BUG_ON(!irq);
-	/* Substract 1 because of get_irq */
-	generic_handle_irq(irq + IRQ_OFFSET - NO_IRQ_OFFSET);
+	generic_handle_irq(irq);
 
-	irq = get_irq(regs);
-	if (irq) {
+	irq = get_irq();
+	if (irq != -1U) {
 		pr_debug("next irq: %d\n", irq);
 		++concurrent_irq;
 		goto next_irq;
@@ -48,18 +47,3 @@ next_irq:
 	set_irq_regs(old_regs);
 	trace_hardirqs_on();
 }
-
-/* MS: There is no any advance mapping mechanism. We are using simple 32bit
-  intc without any cascades or any connection that's why mapping is 1:1 */
-unsigned int irq_create_mapping(struct irq_host *host, irq_hw_number_t hwirq)
-{
-	return hwirq + IRQ_OFFSET;
-}
-EXPORT_SYMBOL_GPL(irq_create_mapping);
-
-unsigned int irq_create_of_mapping(struct device_node *controller,
-				   const u32 *intspec, unsigned int intsize)
-{
-	return intspec[0] + IRQ_OFFSET;
-}
-EXPORT_SYMBOL_GPL(irq_create_of_mapping);
diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
index 604cd9dd1333..70e6d0b41ab4 100644
--- a/arch/microblaze/kernel/setup.c
+++ b/arch/microblaze/kernel/setup.c
@@ -51,8 +51,6 @@ void __init setup_arch(char **cmdline_p)
 
 	unflatten_device_tree();
 
-	/* NOTE I think that this function is not necessary to call */
-	/* irq_early_init(); */
 	setup_cpuinfo();
 
 	microblaze_cache_init();
diff --git a/arch/microblaze/pci/pci-common.c b/arch/microblaze/pci/pci-common.c
index 85f2ac1230a8..d10403dadd2b 100644
--- a/arch/microblaze/pci/pci-common.c
+++ b/arch/microblaze/pci/pci-common.c
@@ -46,9 +46,6 @@ static int global_phb_number;		/* Global phb counter */
 /* ISA Memory physical address */
 resource_size_t isa_mem_base;
 
-/* Default PCI flags is 0 on ppc32, modified at boot on ppc64 */
-unsigned int pci_flags;
-
 static struct dma_map_ops *pci_dma_ops = &dma_direct_ops;
 
 unsigned long isa_io_base;
@@ -833,64 +830,7 @@ int pci_proc_domain(struct pci_bus *bus)
 {
 	struct pci_controller *hose = pci_bus_to_host(bus);
 
-	if (!(pci_flags & PCI_ENABLE_PROC_DOMAINS))
-		return 0;
-	if (pci_flags & PCI_COMPAT_DOMAIN_0)
-		return hose->global_number != 0;
-	return 1;
-}
-
-void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
-			     struct resource *res)
-{
-	resource_size_t offset = 0, mask = (resource_size_t)-1;
-	struct pci_controller *hose = pci_bus_to_host(dev->bus);
-
-	if (!hose)
-		return;
-	if (res->flags & IORESOURCE_IO) {
-		offset = (unsigned long)hose->io_base_virt - _IO_BASE;
-		mask = 0xffffffffu;
-	} else if (res->flags & IORESOURCE_MEM)
-		offset = hose->pci_mem_offset;
-
-	region->start = (res->start - offset) & mask;
-	region->end = (res->end - offset) & mask;
-}
-EXPORT_SYMBOL(pcibios_resource_to_bus);
-
-void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
-			     struct pci_bus_region *region)
-{
-	resource_size_t offset = 0, mask = (resource_size_t)-1;
-	struct pci_controller *hose = pci_bus_to_host(dev->bus);
-
-	if (!hose)
-		return;
-	if (res->flags & IORESOURCE_IO) {
-		offset = (unsigned long)hose->io_base_virt - _IO_BASE;
-		mask = 0xffffffffu;
-	} else if (res->flags & IORESOURCE_MEM)
-		offset = hose->pci_mem_offset;
-	res->start = (region->start + offset) & mask;
-	res->end = (region->end + offset) & mask;
-}
-EXPORT_SYMBOL(pcibios_bus_to_resource);
-
-/* Fixup a bus resource into a linux resource */
-static void __devinit fixup_resource(struct resource *res, struct pci_dev *dev)
-{
-	struct pci_controller *hose = pci_bus_to_host(dev->bus);
-	resource_size_t offset = 0, mask = (resource_size_t)-1;
-
-	if (res->flags & IORESOURCE_IO) {
-		offset = (unsigned long)hose->io_base_virt - _IO_BASE;
-		mask = 0xffffffffu;
-	} else if (res->flags & IORESOURCE_MEM)
-		offset = hose->pci_mem_offset;
-
-	res->start = (res->start + offset) & mask;
-	res->end = (res->end + offset) & mask;
+	return 0;
 }
 
 /* This header fixup will do the resource fixup for all devices as they are
@@ -910,13 +850,7 @@ static void __devinit pcibios_fixup_resources(struct pci_dev *dev)
 		struct resource *res = dev->resource + i;
 		if (!res->flags)
 			continue;
-		/* On platforms that have PCI_PROBE_ONLY set, we don't
-		 * consider 0 as an unassigned BAR value. It's technically
-		 * a valid value, but linux doesn't like it... so when we can
-		 * re-assign things, we do so, but if we can't, we keep it
-		 * around and hope for the best...
-		 */
-		if (res->start == 0 && !(pci_flags & PCI_PROBE_ONLY)) {
+		if (res->start == 0) {
 			pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]" \
 							"is unassigned\n",
 				 pci_name(dev), i,
@@ -929,18 +863,11 @@ static void __devinit pcibios_fixup_resources(struct pci_dev *dev)
 			continue;
 		}
 
-		pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] fixup...\n",
+		pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]\n",
 			 pci_name(dev), i,
 			 (unsigned long long)res->start,\
 			 (unsigned long long)res->end,
 			 (unsigned int)res->flags);
-
-		fixup_resource(res, dev);
-
-		pr_debug("PCI:%s            %016llx-%016llx\n",
-			 pci_name(dev),
-			 (unsigned long long)res->start,
-			 (unsigned long long)res->end);
 	}
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources);
@@ -959,10 +886,6 @@ static int __devinit pcibios_uninitialized_bridge_resource(struct pci_bus *bus,
 	u16 command;
 	int i;
 
-	/* We don't do anything if PCI_PROBE_ONLY is set */
-	if (pci_flags & PCI_PROBE_ONLY)
-		return 0;
-
 	/* Job is a bit different between memory and IO */
 	if (res->flags & IORESOURCE_MEM) {
 		/* If the BAR is non-0 (res != pci_mem_offset) then it's
@@ -1037,9 +960,6 @@ static void __devinit pcibios_fixup_bridge(struct pci_bus *bus)
 			 (unsigned long long)res->end,
 			 (unsigned int)res->flags);
 
-		/* Perform fixup */
-		fixup_resource(res, dev);
-
 		/* Try to detect uninitialized P2P bridge resources,
 		 * and clear them out so they get re-assigned later
 		 */
@@ -1107,9 +1027,6 @@ EXPORT_SYMBOL(pcibios_fixup_bus);
 
 static int skip_isa_ioresource_align(struct pci_dev *dev)
 {
-	if ((pci_flags & PCI_CAN_SKIP_ISA_ALIGN) &&
-	    !(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_ISA))
-		return 1;
 	return 0;
 }
 
@@ -1236,8 +1153,6 @@ void pcibios_allocate_bus_resources(struct pci_bus *bus)
 			 * and as such ensure proper re-allocation
 			 * later.
 			 */
-			if (pci_flags & PCI_REASSIGN_ALL_RSRC)
-				goto clear_resource;
 			pr = pci_find_parent_resource(bus->self, res);
 			if (pr == res) {
 				/* this happens when the generic PCI
@@ -1422,27 +1337,19 @@ void __init pcibios_resource_survey(void)
 	list_for_each_entry(b, &pci_root_buses, node)
 		pcibios_allocate_bus_resources(b);
 
-	if (!(pci_flags & PCI_REASSIGN_ALL_RSRC)) {
-		pcibios_allocate_resources(0);
-		pcibios_allocate_resources(1);
-	}
+	pcibios_allocate_resources(0);
+	pcibios_allocate_resources(1);
 
 	/* Before we start assigning unassigned resource, we try to reserve
 	 * the low IO area and the VGA memory area if they intersect the
 	 * bus available resources to avoid allocating things on top of them
 	 */
-	if (!(pci_flags & PCI_PROBE_ONLY)) {
-		list_for_each_entry(b, &pci_root_buses, node)
-			pcibios_reserve_legacy_regions(b);
-	}
+	list_for_each_entry(b, &pci_root_buses, node)
+		pcibios_reserve_legacy_regions(b);
 
-	/* Now, if the platform didn't decide to blindly trust the firmware,
-	 * we proceed to assigning things that were left unassigned
-	 */
-	if (!(pci_flags & PCI_PROBE_ONLY)) {
-		pr_debug("PCI: Assigning unassigned resources...\n");
-		pci_assign_unassigned_resources();
-	}
+	/* Now proceed to assigning things that were left unassigned */
+	pr_debug("PCI: Assigning unassigned resources...\n");
+	pci_assign_unassigned_resources();
 }
 
 #ifdef CONFIG_HOTPLUG
@@ -1535,7 +1442,7 @@ static void __devinit pcibios_setup_phb_resources(struct pci_controller *hose, s
 		res->end = res->start + IO_SPACE_LIMIT;
 		res->flags = IORESOURCE_IO;
 	}
-	pci_add_resource(resources, res);
+	pci_add_resource_offset(resources, res, hose->io_base_virt - _IO_BASE);
 
 	pr_debug("PCI: PHB IO resource    = %016llx-%016llx [%lx]\n",
 		 (unsigned long long)res->start,
@@ -1558,7 +1465,7 @@ static void __devinit pcibios_setup_phb_resources(struct pci_controller *hose, s
 			res->flags = IORESOURCE_MEM;
 
 		}
-		pci_add_resource(resources, res);
+		pci_add_resource_offset(resources, res, hose->pci_mem_offset);
 
 		pr_debug("PCI: PHB MEM resource %d = %016llx-%016llx [%lx]\n",
 			i, (unsigned long long)res->start,