Merge davem@nuts.ninka.net:/home/davem/src/BK/sparc-2.5

into kernel.bkbits.net:/home/davem/sparc-2.5

arch/alpha/kernel/core_cia.c

@@ -336,7 +336,7 @@ cia_pci_tbi_try2(struct pci_controller *hose,
 }
 
 static inline void
-cia_prepare_tbia_workaround(int cia_rev, int is_pyxis)
+cia_prepare_tbia_workaround(int window)
 {
 	unsigned long *ppte, pte;
 	long i;
@@ -348,20 +348,10 @@ cia_prepare_tbia_workaround(int cia_rev, int is_pyxis)
 	for (i = 0; i < CIA_BROKEN_TBIA_SIZE / sizeof(unsigned long); ++i)
 		ppte[i] = pte;
 
-	if (is_pyxis || cia_rev != 1) {
-		/* We can use W1 for SG on PYXIS/CIA rev 2. */
-		*(vip)CIA_IOC_PCI_W1_BASE = CIA_BROKEN_TBIA_BASE | 3;
-		*(vip)CIA_IOC_PCI_W1_MASK = (CIA_BROKEN_TBIA_SIZE*1024 - 1)
-					    & 0xfff00000;
-		*(vip)CIA_IOC_PCI_T1_BASE = virt_to_phys(ppte) >> 2;
-	} else {
-		/* CIA rev 1 can't use W1 or W2 for SG, apparently,
-		   so use W3, which we made sure is not used for DAC. */
-		*(vip)CIA_IOC_PCI_W3_BASE = CIA_BROKEN_TBIA_BASE | 3;
-		*(vip)CIA_IOC_PCI_W3_MASK = (CIA_BROKEN_TBIA_SIZE*1024 - 1)
-					    & 0xfff00000;
-		*(vip)CIA_IOC_PCI_T3_BASE = virt_to_phys(ppte) >> 2;
-	}
+	*(vip)CIA_IOC_PCI_Wn_BASE(window) = CIA_BROKEN_TBIA_BASE | 3;
+	*(vip)CIA_IOC_PCI_Wn_MASK(window)
+	  = (CIA_BROKEN_TBIA_SIZE*1024 - 1) & 0xfff00000;
+	*(vip)CIA_IOC_PCI_Tn_BASE(window) = virt_to_phys(ppte) >> 2;
 }
 
 static void __init
@@ -581,8 +571,7 @@ static void __init
 do_init_arch(int is_pyxis)
 {
 	struct pci_controller *hose;
-	int temp;
-	int cia_rev;
+	int temp, cia_rev, tbia_window;
 
 	cia_rev = *(vip)CIA_IOC_CIA_REV & CIA_REV_MASK;
 	printk("pci: cia revision %d%s\n",
@@ -712,12 +701,18 @@ do_init_arch(int is_pyxis)
 	   elsewhere, we should not claim that we support DAC unless that
 	   4GB covers all of physical memory.
 
-	   Also, don't do DAC on CIA rev 1, it has other problems and is
-	   unlikely to have more than 2GB of memory anyway, so direct is
-	   fine.
-	*/
-	if (cia_rev == 1 || is_pyxis ||
-	    max_low_pfn > (0x100000000UL >> PAGE_SHIFT)) {
+	   On CIA rev 1, apparently W1 and W2 can't be used for SG. 
+	   At least, there are reports that it doesn't work for Alcor. 
+	   In that case, we have no choice but to use W3 for the TBIA 
+	   workaround, which means we can't use DAC at all. */ 
+
+	tbia_window = 1;
+	if (is_pyxis) {
+		*(vip)CIA_IOC_PCI_W3_BASE = 0;
+	} else if (cia_rev == 1) {
+		*(vip)CIA_IOC_PCI_W1_BASE = 0;
+		tbia_window = 3;
+	} else if (max_low_pfn > (0x100000000UL >> PAGE_SHIFT)) {
 		*(vip)CIA_IOC_PCI_W3_BASE = 0;
 	} else {
 		*(vip)CIA_IOC_PCI_W3_BASE = 0x00000000 | 1 | 8;
@@ -729,7 +724,7 @@ do_init_arch(int is_pyxis)
 	}
 
 	/* Prepare workaround for apparently broken tbia. */
-	cia_prepare_tbia_workaround(cia_rev, is_pyxis);
+	cia_prepare_tbia_workaround(tbia_window);
 }
 
 void __init

arch/alpha/kernel/pci.c

@@ -99,20 +99,13 @@ quirk_cypress(struct pci_dev *dev)
 	   them on.  So if we use a large direct-map window, or a large SG
 	   window, we must avoid the entire 0xfff00000-0xffffffff region.  */
 	else if (dev->class >> 8 == PCI_CLASS_BRIDGE_ISA) {
-#define DMAPSZ (max_low_pfn << PAGE_SHIFT) /* memory size, not window size */
-		if ((__direct_map_base + DMAPSZ - 1) >= 0xfff00000UL) {
+		if (__direct_map_base + __direct_map_size >= 0xfff00000UL)
 			__direct_map_size = 0xfff00000UL - __direct_map_base;
-			printk("%s: adjusting direct map size to 0x%lx\n",
-			       __FUNCTION__, __direct_map_size);
-		} else {
+		else {
 			struct pci_controller *hose = dev->sysdata;
 			struct pci_iommu_arena *pci = hose->sg_pci;
-			if (pci &&
-			    (pci->dma_base + pci->size - 1) >= 0xfff00000UL) {
+			if (pci && pci->dma_base + pci->size >= 0xfff00000UL)
 				pci->size = 0xfff00000UL - pci->dma_base;
- 				printk("%s: adjusting PCI S/G size to 0x%x\n",
-				       __FUNCTION__, pci->size);
-			}
 		}
 	}
 }
@@ -263,9 +256,20 @@ pcibios_fixup_bus(struct pci_bus *bus)
 	struct pci_dev *dev = bus->self;
 
 	if (!dev) {
-		/* Root bus */
+		/* Root bus. */
+		u32 pci_mem_end;
+		u32 sg_base = hose->sg_pci ? hose->sg_pci->dma_base : ~0;
+		unsigned long end;
+
 		bus->resource[0] = hose->io_space;
 		bus->resource[1] = hose->mem_space;
+
+		/* Adjust hose mem_space limit to prevent PCI allocations
+		   in the iommu windows. */
+		pci_mem_end = min((u32)__direct_map_base, sg_base) - 1;
+		end = hose->mem_space->start + pci_mem_end;
+		if (hose->mem_space->end > end)
+			hose->mem_space->end = end;
 	}
 
 	for (ln = bus->devices.next; ln != &bus->devices; ln = ln->next) {
@@ -276,10 +280,11 @@ pcibios_fixup_bus(struct pci_bus *bus)
 }
 
 void
-pcibios_update_resource(struct pci_dev *dev, struct resource *root,
+pcibios_update_resource(struct pci_dev *dev, struct resource *parent,
 			struct resource *res, int resource)
 {
 	struct pci_controller *hose = dev->sysdata;
+	struct resource *root;
 	int where;
 	u32 reg;
 
@@ -294,8 +299,11 @@ pcibios_update_resource(struct pci_dev *dev, struct resource *root,
 	/* Point root at the hose root. */
 	if (res->flags & IORESOURCE_IO)
 		root = hose->io_space;
-	if (res->flags & IORESOURCE_MEM)
+	else if (res->flags & IORESOURCE_MEM)
 		root = hose->mem_space;
+	else {
+		return; /* Don't update non-standard resources here. */
+	}
 
 	reg = (res->start - root->start) | (res->flags & 0xf);
 	pci_write_config_dword(dev, where, reg);
@@ -359,7 +367,27 @@ pcibios_fixup_pbus_ranges(struct pci_bus * bus,
 int
 pcibios_enable_device(struct pci_dev *dev, int mask)
 {
-	/* Nothing to do, since we enable all devices at startup.  */
+	u16 cmd, oldcmd;
+	int i;
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	oldcmd = cmd;
+
+	for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+		struct resource *res = &dev->resource[i];
+
+		if (res->flags & IORESOURCE_IO)
+			cmd |= PCI_COMMAND_IO;
+		else if (res->flags & IORESOURCE_MEM)
+			cmd |= PCI_COMMAND_MEMORY;
+	}
+
+	if (cmd != oldcmd) {
+		printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n",
+		       dev->slot_name, cmd);
+		/* Enable the appropriate bits in the PCI command register.  */
+		pci_write_config_word(dev, PCI_COMMAND, cmd);
+	}
 	return 0;
 }
 

arch/alpha/kernel/signal.c

@@ -587,6 +587,10 @@ syscall_restart(unsigned long r0, unsigned long r19,
 		regs->r19 = r19;
 		regs->pc -= 4;
 		break;
+	case ERESTART_RESTARTBLOCK:
+		current_thread_info()->restart_block.fn = do_no_restart_syscall;
+		regs->r0 = EINTR;
+		break;
 	}
 }
 
@@ -628,13 +632,22 @@ do_signal(sigset_t *oldset, struct pt_regs * regs, struct switch_stack * sw,
 		return 1;
 	}
 
-	if (r0 &&
-	    (regs->r0 == ERESTARTNOHAND ||
-	     regs->r0 == ERESTARTSYS ||
-	     regs->r0 == ERESTARTNOINTR)) {
-		regs->r0 = r0;	/* reset v0 and a3 and replay syscall */
+	if (r0) {
+	  	switch (regs->r0) {
+		case ERESTARTNOHAND:
+		case ERESTARTSYS:
+		case ERESTARTNOINTR:
+			/* Reset v0 and a3 and replay syscall.  */
+			regs->r0 = r0;
 			regs->r19 = r19;
 			regs->pc -= 4;
+			break;
+		case ERESTART_RESTARTBLOCK:
+			/* Force v0 to the restart syscall and reply.  */
+			regs->r0 = __NR_restart_syscall;
+			regs->pc -= 4;
+			break;
+		}
 	}
 	if (single_stepping)
 		ptrace_set_bpt(current);	/* re-set breakpoint */

arch/alpha/kernel/systbls.S

@@ -431,6 +431,7 @@ sys_call_table:
 	.quad sys_epoll_wait
 	.quad sys_remap_file_pages		/* 410 */
 	.quad sys_set_tid_address
+	.quad sys_restart_syscall
 
 	.size sys_call_table, . - sys_call_table
 	.type sys_call_table, @object

arch/alpha/lib/ev6-stxncpy.S

@@ -25,7 +25,7 @@
  *	a0  = unaligned address of the last *word* written
  *	a2  = the number of full words left in COUNT
  *
- * Furthermore, v0, a3-a5, t11, t12, and $at are untouched.
+ * Furthermore, v0, a3-a5, t11, and $at are untouched.
  *
  * Much of the information about 21264 scheduling/coding comes from:
  *	Compiler Writer's Guide for the Alpha 21264
@@ -324,7 +324,7 @@ $u_eoc:
 	extqh	t2, a1, t0	# U : extract low bits for last word (stall)
 	or	t1, t0, t1	# E : (stall)
 
-	cmpbge	zero, t1, t8	# E :
+1:	cmpbge	zero, t1, t8	# E :
 	mov	t1, t0		# E :
 
 $u_eocfin:			# end-of-count, final word
@@ -350,17 +350,17 @@ $unaligned:
 	mskql	t6, a0, t6	# U :
 	nop
 	nop
-1:	subq	a1, t4, a1	# E : sub dest misalignment from src addr
+	subq	a1, t4, a1	# E : sub dest misalignment from src addr
 
 	/* If source misalignment is larger than dest misalignment, we need
 	   extra startup checks to avoid SEGV.  */
 
-	cmplt	t4, t5, t12	# E :
+1:	cmplt	t4, t5, t12	# E :
 	extql	t1, a1, t1	# U : shift src into place
 	lda	t2, -1		# E : for creating masks later
 	beq	t12, $u_head	# U : (stall)
 
-	mskqh	t2, t5, t2	# U : begin src byte validity mask
+	nop
 	cmpbge	zero, t1, t8	# E : is there a zero?
 	extql	t2, a1, t2	# U :
 	or	t8, t10, t5	# E : test for end-of-count too

arch/alpha/lib/stxncpy.S

@@ -25,7 +25,7 @@
  *	a0  = unaligned address of the last *word* written
  *	a2  = the number of full words left in COUNT
  *
- * Furthermore, v0, a3-a5, t11, t12, and $at are untouched.
+ * Furthermore, v0, a3-a5, t11, and $at are untouched.
  */
 
 #include <asm/regdef.h>
@@ -269,7 +269,7 @@ $u_final:
 	   t1 == the shifted high-order bits from the previous source word  */
 $u_eoc:
 	and	a1, 7, t6	# e1    :
-	sll	t12, t6, t6	# e0    :
+	sll	t10, t6, t6	# e0    :
 	and	t6, 0xff, t6	# e0    :
 	bne	t6, 1f		# .. e1 :
 
@@ -303,18 +303,17 @@ $unaligned:
 	ldq_u	t0, 0(a0)	# e0    :
 	lda	t6, -1		# .. e1 :
 	mskql	t6, a0, t6	# e0    :
-1:
 	subq	a1, t4, a1	# .. e1 : sub dest misalignment from src addr
 
 	/* If source misalignment is larger than dest misalignment, we need
 	   extra startup checks to avoid SEGV.  */
 
-	cmplt	t4, t5, t12	# e1    :
+1:	cmplt	t4, t5, t12	# e1    :
 	extql	t1, a1, t1	# .. e0 : shift src into place
 	lda	t2, -1		# e0    : for creating masks later
-	beq	t12, $u_head	# e1    :
+	beq	t12, $u_head	# .. e1 :
 
-	mskqh	t2, t5, t2	# e0    : begin src byte validity mask
+	nop			# e0    :
 	cmpbge	zero, t1, t8	# .. e1 : is there a zero?
 	extql	t2, a1, t2	# e0    :
 	or	t8, t10, t5	# .. e1 : test for end-of-count too

include/asm-alpha/core_cia.h

@@ -202,6 +202,10 @@
 #define CIA_IOC_PCI_W3_MASK		(IDENT_ADDR + 0x8760000740UL)
 #define CIA_IOC_PCI_T3_BASE		(IDENT_ADDR + 0x8760000780UL)
 
+#define CIA_IOC_PCI_Wn_BASE(N)	(IDENT_ADDR + 0x8760000400UL + (N)*0x100) 
+#define CIA_IOC_PCI_Wn_MASK(N)	(IDENT_ADDR + 0x8760000440UL + (N)*0x100) 
+#define CIA_IOC_PCI_Tn_BASE(N)	(IDENT_ADDR + 0x8760000480UL + (N)*0x100) 
+
 #define CIA_IOC_PCI_W_DAC		(IDENT_ADDR + 0x87600007C0UL)
 
 /*

include/asm-alpha/current.h

 #ifndef _ALPHA_CURRENT_H
 #define _ALPHA_CURRENT_H
 
-#include <asm/thread_info.h>
+#include <linux/thread_info.h>
 
 #define get_current()	(current_thread_info()->task + 0)
 #define current		get_current()

include/asm-alpha/pci.h

@@ -6,6 +6,8 @@
 #include <linux/spinlock.h>
 #include <asm/scatterlist.h>
 #include <asm/machvec.h>
+#include <asm/io.h>
+
 
 /*
  * The following structure is used to manage multiple PCI busses.

include/asm-alpha/thread_info.h

@@ -25,6 +25,8 @@ struct thread_info {
 	int bpt_nsaved;
 	unsigned long bpt_addr[2];		/* breakpoint handling  */
 	unsigned int bpt_insn[2];
+
+	struct restart_block	restart_block;
 };
 
 /*
@@ -35,6 +37,9 @@ struct thread_info {
 	task:		&tsk,			\
 	exec_domain:	&default_exec_domain,	\
 	addr_limit:	KERNEL_DS,		\
+	.restart_block = {			\
+		.fn = do_no_restart_syscall,	\
+	},					\
 }
 
 #define init_thread_info	(init_thread_union.thread_info)

include/asm-alpha/topology.h

 #ifndef _ASM_ALPHA_TOPOLOGY_H
 #define _ASM_ALPHA_TOPOLOGY_H
 
-#ifdef CONFIG_NUMA
-#ifdef CONFIG_ALPHA_WILDFIRE
+#if defined(CONFIG_NUMA) && defined(CONFIG_ALPHA_WILDFIRE)
+
 /* With wildfire assume 4 CPUs per node */
 #define __cpu_to_node(cpu)		((cpu) >> 2)
-#endif /* CONFIG_ALPHA_WILDFIRE */
-#endif /* CONFIG_NUMA */
 
-#if !defined(CONFIG_NUMA) || !defined(CONFIG_ALPHA_WILDFIRE)
-#define __cpu_to_node(cpu)		(0)
-#define __memblk_to_node(memblk)	(0)
-#define __parent_node(nid)		(0)
-#define __node_to_first_cpu(node)	(0)
-#define __node_to_cpu_mask(node)	(cpu_online_map)
-#define __node_to_memblk(node)		(0)
-#endif /* !CONFIG_NUMA || !CONFIG_ALPHA_WILDFIRE */
+#else /* !CONFIG_NUMA || !CONFIG_ALPHA_WILDFIRE */
+
+#include <asm-generic/topology.h>
+
+#endif /* CONFIG_NUMA && CONFIG_ALPHA_WILDFIRE */
 
 #endif /* _ASM_ALPHA_TOPOLOGY_H */

include/asm-alpha/unistd.h

@@ -349,7 +349,8 @@
 #define __NR_sys_epoll_wait		409
 #define __NR_remap_file_pages		410
 #define __NR_set_tid_address		411
-#define NR_SYSCALLS			412
+#define __NR_restart_syscall		412
+#define NR_SYSCALLS			413
 
 #if defined(__GNUC__)