Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (408 commits)
  [POWERPC] Add memchr() to the bootwrapper
  [POWERPC] Implement logging of unhandled signals
  [POWERPC] Add legacy serial support for OPB with flattened device tree
  [POWERPC] Use 1TB segments
  [POWERPC] XilinxFB: Allow fixed framebuffer base address
  [POWERPC] XilinxFB: Add support for custom screen resolution
  [POWERPC] XilinxFB: Use pdata to pass around framebuffer parameters
  [POWERPC] PCI: Add 64-bit physical address support to setup_indirect_pci
  [POWERPC] 4xx: Kilauea defconfig file
  [POWERPC] 4xx: Kilauea DTS
  [POWERPC] 4xx: Add AMCC Kilauea eval board support to platforms/40x
  [POWERPC] 4xx: Add AMCC 405EX support to cputable.c
  [POWERPC] Adjust TASK_SIZE on ppc32 systems to 3GB that are capable
  [POWERPC] Use PAGE_OFFSET to tell if an address is user/kernel in SW TLB handlers
  [POWERPC] 85xx: Enable FP emulation in MPC8560 ADS defconfig
  [POWERPC] 85xx: Killed <asm/mpc85xx.h>
  [POWERPC] 85xx: Add cpm nodes for 8541/8555 CDS
  [POWERPC] 85xx: Convert mpc8560ads to the new CPM binding.
  [POWERPC] mpc8272ads: Remove muram from the CPM reg property.
  [POWERPC] Make clockevents work on PPC601 processors
  ...

Fixed up conflict in Documentation/powerpc/booting-without-of.txt manually.

7 files changed, 203 insertions, 26 deletions

diff --git a/arch/powerpc/platforms/pasemi/Kconfig b/arch/powerpc/platforms/pasemi/Kconfig
index e95261ef6f9..735e1536cbf 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -5,6 +5,7 @@ config PPC_PASEMI
 	select MPIC
 	select PPC_UDBG_16550
 	select PPC_NATIVE
+	select MPIC_BROKEN_REGREAD
 	help
 	  This option enables support for PA Semi's PWRficient line
 	  of SoC processors, including PA6T-1682M
diff --git a/arch/powerpc/platforms/pasemi/gpio_mdio.c b/arch/powerpc/platforms/pasemi/gpio_mdio.c
index c91a33593bb..dae9f658122 100644
--- a/arch/powerpc/platforms/pasemi/gpio_mdio.c
+++ b/arch/powerpc/platforms/pasemi/gpio_mdio.c
@@ -320,10 +320,12 @@ static struct of_device_id gpio_mdio_match[] =
 
 static struct of_platform_driver gpio_mdio_driver =
 {
-	.name		= "gpio-mdio-bitbang",
 	.match_table	= gpio_mdio_match,
 	.probe		= gpio_mdio_probe,
 	.remove		= gpio_mdio_remove,
+	.driver		= {
+		.name	= "gpio-mdio-bitbang",
+	},
 };
 
 int gpio_mdio_init(void)
diff --git a/arch/powerpc/platforms/pasemi/idle.c b/arch/powerpc/platforms/pasemi/idle.c
index 3c962d5757b..d8e1fcc7851 100644
--- a/arch/powerpc/platforms/pasemi/idle.c
+++ b/arch/powerpc/platforms/pasemi/idle.c
@@ -72,8 +72,11 @@ static int pasemi_system_reset_exception(struct pt_regs *regs)
 	return 1;
 }
 
-void __init pasemi_idle_init(void)
+static int __init pasemi_idle_init(void)
 {
+	if (!machine_is(pasemi))
+		return -ENODEV;
+
 #ifndef CONFIG_PPC_PASEMI_CPUFREQ
 	printk(KERN_WARNING "No cpufreq driver, powersavings modes disabled\n");
 	current_mode = 0;
@@ -82,7 +85,10 @@ void __init pasemi_idle_init(void)
 	ppc_md.system_reset_exception = pasemi_system_reset_exception;
 	ppc_md.power_save = modes[current_mode].entry;
 	printk(KERN_INFO "Using PA6T idle loop (%s)\n", modes[current_mode].name);
+
+	return 0;
 }
+late_initcall(pasemi_idle_init);
 
 static int __init idle_param(char *p)
 {
diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c
index a1111b5c6cb..9916a0f3e43 100644
--- a/arch/powerpc/platforms/pasemi/iommu.c
+++ b/arch/powerpc/platforms/pasemi/iommu.c
@@ -192,7 +192,7 @@ static void pci_dma_dev_setup_pasemi(struct pci_dev *dev)
 static void pci_dma_bus_setup_null(struct pci_bus *b) { }
 static void pci_dma_dev_setup_null(struct pci_dev *d) { }
 
-int iob_init(struct device_node *dn)
+int __init iob_init(struct device_node *dn)
 {
 	unsigned long tmp;
 	u32 regword;
@@ -238,7 +238,7 @@ int iob_init(struct device_node *dn)
 
 
 /* These are called very early. */
-void iommu_init_early_pasemi(void)
+void __init iommu_init_early_pasemi(void)
 {
 	int iommu_off;
 
diff --git a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h
index be849549761..516acabb4e9 100644
--- a/arch/powerpc/platforms/pasemi/pasemi.h
+++ b/arch/powerpc/platforms/pasemi/pasemi.h
@@ -6,9 +6,9 @@ extern void pas_pci_init(void);
 extern void __devinit pas_pci_irq_fixup(struct pci_dev *dev);
 extern void __devinit pas_pci_dma_dev_setup(struct pci_dev *dev);
 
-extern void __init alloc_iobmap_l2(void);
+extern void __iomem *pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset);
 
-extern void __init pasemi_idle_init(void);
+extern void __init alloc_iobmap_l2(void);
 
 /* Power savings modes, implemented in asm */
 extern void idle_spin(void);
diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c
index ab1f5f62bcd..b6a0ec45c69 100644
--- a/arch/powerpc/platforms/pasemi/pci.c
+++ b/arch/powerpc/platforms/pasemi/pci.c
@@ -51,6 +51,61 @@ static void volatile __iomem *pa_pxp_cfg_addr(struct pci_controller *hose,
 	return hose->cfg_data + PA_PXP_CFA(bus, devfn, offset);
 }
 
+static inline int is_root_port(int busno, int devfn)
+{
+	return ((busno == 0) && (PCI_FUNC(devfn) < 4) &&
+		 ((PCI_SLOT(devfn) == 16) || (PCI_SLOT(devfn) == 17)));
+}
+
+static inline int is_5945_reg(int reg)
+{
+	return (((reg >= 0x18) && (reg < 0x34)) ||
+		((reg >= 0x158) && (reg < 0x178)));
+}
+
+static int workaround_5945(struct pci_bus *bus, unsigned int devfn,
+			   int offset, int len, u32 *val)
+{
+	struct pci_controller *hose;
+	void volatile __iomem *addr, *dummy;
+	int byte;
+	u32 tmp;
+
+	if (!is_root_port(bus->number, devfn) || !is_5945_reg(offset))
+		return 0;
+
+	hose = pci_bus_to_host(bus);
+
+	addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset & ~0x3);
+	byte = offset & 0x3;
+
+	/* Workaround bug 5945: write 0 to a dummy register before reading,
+	 * and write back what we read. We must read/write the full 32-bit
+	 * contents so we need to shift and mask by hand.
+	 */
+	dummy = pa_pxp_cfg_addr(hose, bus->number, devfn, 0x10);
+	out_le32(dummy, 0);
+	tmp = in_le32(addr);
+	out_le32(addr, tmp);
+
+	switch (len) {
+	case 1:
+		*val = (tmp >> (8*byte)) & 0xff;
+		break;
+	case 2:
+		if (byte == 0)
+			*val = tmp & 0xffff;
+		else
+			*val = (tmp >> 16) & 0xffff;
+		break;
+	default:
+		*val = tmp;
+		break;
+	}
+
+	return 1;
+}
+
 static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn,
 			      int offset, int len, u32 *val)
 {
@@ -64,6 +119,9 @@ static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn,
 	if (!pa_pxp_offset_valid(bus->number, devfn, offset))
 		return PCIBIOS_BAD_REGISTER_NUMBER;
 
+	if (workaround_5945(bus, devfn, offset, len, val))
+		return PCIBIOS_SUCCESSFUL;
+
 	addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
 
 	/*
@@ -107,23 +165,20 @@ static int pa_pxp_write_config(struct pci_bus *bus, unsigned int devfn,
 	switch (len) {
 	case 1:
 		out_8(addr, val);
-		(void) in_8(addr);
 		break;
 	case 2:
 		out_le16(addr, val);
-		(void) in_le16(addr);
 		break;
 	default:
 		out_le32(addr, val);
-		(void) in_le32(addr);
 		break;
 	}
 	return PCIBIOS_SUCCESSFUL;
 }
 
 static struct pci_ops pa_pxp_ops = {
-	pa_pxp_read_config,
-	pa_pxp_write_config,
+	.read = pa_pxp_read_config,
+	.write = pa_pxp_write_config,
 };
 
 static void __init setup_pa_pxp(struct pci_controller *hose)
@@ -178,3 +233,12 @@ void __init pas_pci_init(void)
 	/* Use the common resource allocation mechanism */
 	pci_probe_only = 1;
 }
+
+void __iomem *pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset)
+{
+	struct pci_controller *hose;
+
+	hose = pci_bus_to_host(dev->bus);
+
+	return (void __iomem *)pa_pxp_cfg_addr(hose, dev->bus->number, dev->devfn, offset);
+}
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index ffe6528048b..5ddf40a66ae 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -39,8 +39,21 @@
 
 #include "pasemi.h"
 
+/* SDC reset register, must be pre-mapped at reset time */
 static void __iomem *reset_reg;
 
+/* Various error status registers, must be pre-mapped at MCE time */
+
+#define MAX_MCE_REGS	32
+struct mce_regs {
+	char *name;
+	void __iomem *addr;
+};
+
+static struct mce_regs mce_regs[MAX_MCE_REGS];
+static int num_mce_regs;
+
+
 static void pas_restart(char *cmd)
 {
 	printk("Restarting...\n");
@@ -50,26 +63,30 @@ static void pas_restart(char *cmd)
 
 #ifdef CONFIG_SMP
 static DEFINE_SPINLOCK(timebase_lock);
+static unsigned long timebase;
 
 static void __devinit pas_give_timebase(void)
 {
-	unsigned long tb;
-
 	spin_lock(&timebase_lock);
 	mtspr(SPRN_TBCTL, TBCTL_FREEZE);
-	tb = mftb();
-	mtspr(SPRN_TBCTL, TBCTL_UPDATE_LOWER | (tb & 0xffffffff));
-	mtspr(SPRN_TBCTL, TBCTL_UPDATE_UPPER | (tb >> 32));
-	mtspr(SPRN_TBCTL, TBCTL_RESTART);
+	isync();
+	timebase = get_tb();
 	spin_unlock(&timebase_lock);
-	pr_debug("pas_give_timebase: cpu %d gave tb %lx\n",
-		 smp_processor_id(), tb);
+
+	while (timebase)
+		barrier();
+	mtspr(SPRN_TBCTL, TBCTL_RESTART);
 }
 
 static void __devinit pas_take_timebase(void)
 {
-	pr_debug("pas_take_timebase: cpu %d has tb %lx\n",
-		 smp_processor_id(), mftb());
+	while (!timebase)
+		smp_rmb();
+
+	spin_lock(&timebase_lock);
+	set_tb(timebase >> 32, timebase & 0xffffffff);
+	timebase = 0;
+	spin_unlock(&timebase_lock);
 }
 
 struct smp_ops_t pas_smp_ops = {
@@ -98,9 +115,60 @@ void __init pas_setup_arch(void)
 	/* Remap SDC register for doing reset */
 	/* XXXOJN This should maybe come out of the device tree */
 	reset_reg = ioremap(0xfc101100, 4);
+}
+
+static int __init pas_setup_mce_regs(void)
+{
+	struct pci_dev *dev;
+	int reg;
+
+	if (!machine_is(pasemi))
+		return -ENODEV;
+
+	/* Remap various SoC status registers for use by the MCE handler */
+
+	reg = 0;
+
+	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
+	while (dev && reg < MAX_MCE_REGS) {
+		mce_regs[reg].name = kasprintf(GFP_KERNEL,
+						"mc%d_mcdebug_errsta", reg);
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
+		dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
+		reg++;
+	}
+
+	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
+	if (dev && reg+4 < MAX_MCE_REGS) {
+		mce_regs[reg].name = "iobdbg_IntStatus1";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
+		reg++;
+		mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
+		reg++;
+		mce_regs[reg].name = "iobiom_IntStatus";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
+		reg++;
+		mce_regs[reg].name = "iobiom_IntDbgReg";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
+		reg++;
+	}
+
+	dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
+	if (dev && reg+2 < MAX_MCE_REGS) {
+		mce_regs[reg].name = "l2csts_IntStatus";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
+		reg++;
+		mce_regs[reg].name = "l2csts_Cnt";
+		mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
+		reg++;
+	}
 
-	pasemi_idle_init();
+	num_mce_regs = reg;
+
+	return 0;
 }
+device_initcall(pas_setup_mce_regs);
 
 static __init void pas_init_IRQ(void)
 {
@@ -162,25 +230,34 @@ static int pas_machine_check_handler(struct pt_regs *regs)
 {
 	int cpu = smp_processor_id();
 	unsigned long srr0, srr1, dsisr;
+	int dump_slb = 0;
+	int i;
 
 	srr0 = regs->nip;
 	srr1 = regs->msr;
 	dsisr = mfspr(SPRN_DSISR);
 	printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
-	printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
-	printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
+	printk(KERN_ERR "SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
+	printk(KERN_ERR "DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
+	printk(KERN_ERR "BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
+		mfspr(SPRN_PA6T_MER));
+	printk(KERN_ERR "IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
+		mfspr(SPRN_PA6T_DER));
 	printk(KERN_ERR "Cause:\n");
 
 	if (srr1 & 0x200000)
 		printk(KERN_ERR "Signalled by SDC\n");
+
 	if (srr1 & 0x100000) {
 		printk(KERN_ERR "Load/Store detected error:\n");
 		if (dsisr & 0x8000)
 			printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 		if (dsisr & 0x4000)
 			printk(KERN_ERR "LSU snoop response error\n");
-		if (dsisr & 0x2000)
+		if (dsisr & 0x2000) {
 			printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
+			dump_slb = 1;
+		}
 		if (dsisr & 0x1000)
 			printk(KERN_ERR "Recoverable Duptags\n");
 		if (dsisr & 0x800)
@@ -188,13 +265,40 @@ static int pas_machine_check_handler(struct pt_regs *regs)
 		if (dsisr & 0x400)
 			printk(KERN_ERR "TLB parity error count overflow\n");
 	}
+
 	if (srr1 & 0x80000)
 		printk(KERN_ERR "Bus Error\n");
-	if (srr1 & 0x40000)
+
+	if (srr1 & 0x40000) {
 		printk(KERN_ERR "I-side SLB multiple hit\n");
+		dump_slb = 1;
+	}
+
 	if (srr1 & 0x20000)
 		printk(KERN_ERR "I-cache parity error hit\n");
 
+	if (num_mce_regs == 0)
+		printk(KERN_ERR "No MCE registers mapped yet, can't dump\n");
+	else
+		printk(KERN_ERR "SoC debug registers:\n");
+
+	for (i = 0; i < num_mce_regs; i++)
+		printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name,
+			in_le32(mce_regs[i].addr));
+
+	if (dump_slb) {
+		unsigned long e, v;
+		int i;
+
+		printk(KERN_ERR "slb contents:\n");
+		for (i = 0; i < SLB_NUM_ENTRIES; i++) {
+			asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
+			asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
+			printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v);
+		}
+	}
+
+
 	/* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 	return !!(srr1 & 0x2);
 }