21 files changed, 314 insertions, 146 deletions

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index d2ded19e4064..8120d428ebfd 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -17,6 +17,7 @@ obj-y				+= vdso32/
 obj-$(CONFIG_PPC64)		+= setup_64.o binfmt_elf32.o sys_ppc32.o \
 				   signal_64.o ptrace32.o \
 				   paca.o cpu_setup_ppc970.o \
+				   cpu_setup_pa6t.o \
 				   firmware.o sysfs.o nvram_64.o
 obj-$(CONFIG_PPC64)		+= vdso64/
 obj-$(CONFIG_ALTIVEC)		+= vecemu.o vector.o
diff --git a/arch/powerpc/kernel/cpu_setup_pa6t.S b/arch/powerpc/kernel/cpu_setup_pa6t.S
new file mode 100644
index 000000000000..4047be25c4d2
--- /dev/null
+++ b/arch/powerpc/kernel/cpu_setup_pa6t.S
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 <asm/processor.h>
+#include <asm/page.h>
+#include <asm/cputable.h>
+#include <asm/ppc_asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/cache.h>
+
+/* Right now, restore and setup are the same thing */
+_GLOBAL(__restore_cpu_pa6t)
+_GLOBAL(__setup_cpu_pa6t)
+	/* Do nothing if not running in HV mode */
+	mfmsr	r0
+	rldicl.	r0,r0,4,63
+	beqlr
+
+	mfspr	r0,SPRN_HID5
+	ori	r0,r0,0x30
+	mtspr	SPRN_HID5,r0
+
+	mfspr	r0,SPRN_LPCR
+	ori	r0,r0,0x7000
+	mtspr	SPRN_LPCR,r0
+
+	blr
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index b742013bb9da..dd17dffbf058 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -43,6 +43,8 @@ extern void __setup_cpu_745x(unsigned long offset, struct cpu_spec* spec);
 #ifdef CONFIG_PPC64
 extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_ppc970MP(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_pa6t(unsigned long offset, struct cpu_spec* spec);
+extern void __restore_cpu_pa6t(unsigned long offset, struct cpu_spec* spec);
 extern void __restore_cpu_ppc970(void);
 #endif /* CONFIG_PPC64 */
 
@@ -86,6 +88,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "power3",
@@ -99,6 +102,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power3",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "power3",
@@ -112,6 +116,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -125,6 +130,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -138,6 +144,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -151,6 +158,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/rs64",
 		.oprofile_type		= PPC_OPROFILE_RS64,
 		.platform		= "rs64",
@@ -164,6 +172,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power4",
@@ -177,6 +186,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power4",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.platform		= "power4",
@@ -191,6 +201,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.cpu_setup		= __setup_cpu_ppc970,
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
@@ -207,6 +218,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.cpu_setup		= __setup_cpu_ppc970,
 		.cpu_restore		= __restore_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
@@ -239,6 +251,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 8,
+		.pmc_type		= PPC_PMC_IBM,
 		.cpu_setup		= __setup_cpu_ppc970,
 		.oprofile_cpu_type	= "ppc64/970",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
@@ -253,6 +266,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power5",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		/* SIHV / SIPR bits are implemented on POWER4+ (GQ)
@@ -271,6 +285,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power5+",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
 		.oprofile_mmcra_sihv	= MMCRA_SIHV,
@@ -321,6 +336,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/power6",
 		.oprofile_type		= PPC_OPROFILE_POWER4,
  		.oprofile_mmcra_sihv	= POWER6_MMCRA_SIHV,
@@ -340,6 +356,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 4,
+		.pmc_type		= PPC_PMC_IBM,
 		.oprofile_cpu_type	= "ppc64/cell-be",
 		.oprofile_type		= PPC_OPROFILE_CELL,
 		.platform		= "ppc-cell-be",
@@ -353,6 +370,9 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 64,
 		.dcache_bsize		= 64,
 		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_PA6T,
+		.cpu_setup		= __setup_cpu_pa6t,
+		.cpu_restore		= __restore_cpu_pa6t,
 		.platform		= "pa6t",
 	},
 	{	/* default match */
@@ -364,6 +384,7 @@ static struct cpu_spec cpu_specs[] = {
 		.icache_bsize		= 128,
 		.dcache_bsize		= 128,
 		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_IBM,
 		.platform		= "power4",
 	}
 #endif	/* CONFIG_PPC64 */
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 2551c0884afc..2b66d53dcc55 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -172,13 +172,18 @@ syscall_error_cont:
 	stdcx.	r0,0,r1			/* to clear the reservation */
 	andi.	r6,r8,MSR_PR
 	ld	r4,_LINK(r1)
+	/*
+	 * Clear RI before restoring r13.  If we are returning to
+	 * userspace and we take an exception after restoring r13,
+	 * we end up corrupting the userspace r13 value.
+	 */
+	li	r12,MSR_RI
+	andc	r11,r10,r12
+	mtmsrd	r11,1			/* clear MSR.RI */
 	beq-	1f
 	ACCOUNT_CPU_USER_EXIT(r11, r12)
 	ld	r13,GPR13(r1)	/* only restore r13 if returning to usermode */
 1:	ld	r2,GPR2(r1)
-	li	r12,MSR_RI
-	andc	r11,r10,r12
-	mtmsrd	r11,1			/* clear MSR.RI */
 	ld	r1,GPR1(r1)
 	mtlr	r4
 	mtcr	r5
@@ -488,42 +493,44 @@ END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
 #endif
 	stb	r5,PACASOFTIRQEN(r13)
 
+	/* extract EE bit and use it to restore paca->hard_enabled */
 	ld	r3,_MSR(r1)
+	rldicl	r4,r3,49,63		/* r0 = (r3 >> 15) & 1 */
+	stb	r4,PACAHARDIRQEN(r13)
+
+	ld	r4,_CTR(r1)
+	ld	r0,_LINK(r1)
+	mtctr	r4
+	mtlr	r0
+	ld	r4,_XER(r1)
+	mtspr	SPRN_XER,r4
+
+	REST_8GPRS(5, r1)
+
 	andi.	r0,r3,MSR_RI
 	beq-	unrecov_restore
 
-	/* extract EE bit and use it to restore paca->hard_enabled */
-	rldicl	r4,r3,49,63		/* r0 = (r3 >> 15) & 1 */
-	stb	r4,PACAHARDIRQEN(r13)
+	stdcx.	r0,0,r1		/* to clear the reservation */
 
-	andi.	r0,r3,MSR_PR
+	/*
+	 * Clear RI before restoring r13.  If we are returning to
+	 * userspace and we take an exception after restoring r13,
+	 * we end up corrupting the userspace r13 value.
+	 */
+	mfmsr	r4
+	andc	r4,r4,r0	/* r0 contains MSR_RI here */
+	mtmsrd	r4,1
 
 	/*
 	 * r13 is our per cpu area, only restore it if we are returning to
 	 * userspace
 	 */
+	andi.	r0,r3,MSR_PR
 	beq	1f
-	ACCOUNT_CPU_USER_EXIT(r3, r4)
+	ACCOUNT_CPU_USER_EXIT(r2, r4)
 	REST_GPR(13, r1)
 1:
-	ld	r3,_CTR(r1)
-	ld	r0,_LINK(r1)
-	mtctr	r3
-	mtlr	r0
-	ld	r3,_XER(r1)
-	mtspr	SPRN_XER,r3
-
-	REST_8GPRS(5, r1)
-
-	stdcx.	r0,0,r1		/* to clear the reservation */
-
-	mfmsr	r0
-	li	r2, MSR_RI
-	andc	r0,r0,r2
-	mtmsrd	r0,1
-
-	ld	r0,_MSR(r1)
-	mtspr	SPRN_SRR1,r0
+	mtspr	SPRN_SRR1,r3
 
 	ld	r2,_CCR(r1)
 	mtcrf	0xFF,r2
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 9417cf5b4b7e..c897203198b1 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -344,12 +344,7 @@ i##n:								\
 /* System reset */
 /* core99 pmac starts the seconary here by changing the vector, and
    putting it back to what it was (unknown_exception) when done.  */
-#if defined(CONFIG_GEMINI) && defined(CONFIG_SMP)
-	. = 0x100
-	b	__secondary_start_gemini
-#else
 	EXCEPTION(0x100, Reset, unknown_exception, EXC_XFER_STD)
-#endif
 
 /* Machine check */
 /*
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 71b1fe58e9e4..97cedcd6c9b4 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -613,7 +613,7 @@ system_call_pSeries:
 /*** pSeries interrupt support ***/
 
 	/* moved from 0xf00 */
-	MASKABLE_EXCEPTION_PSERIES(., performance_monitor)
+	STD_EXCEPTION_PSERIES(., performance_monitor)
 
 /*
  * An interrupt came in while soft-disabled; clear EE in SRR1,
diff --git a/arch/powerpc/kernel/iomap.c b/arch/powerpc/kernel/iomap.c
index c68113371050..601ef79a5916 100644
--- a/arch/powerpc/kernel/iomap.c
+++ b/arch/powerpc/kernel/iomap.c
@@ -12,23 +12,23 @@
  * Here comes the ppc64 implementation of the IOMAP 
  * interfaces.
  */
-unsigned int fastcall ioread8(void __iomem *addr)
+unsigned int ioread8(void __iomem *addr)
 {
 	return readb(addr);
 }
-unsigned int fastcall ioread16(void __iomem *addr)
+unsigned int ioread16(void __iomem *addr)
 {
 	return readw(addr);
 }
-unsigned int fastcall ioread16be(void __iomem *addr)
+unsigned int ioread16be(void __iomem *addr)
 {
 	return in_be16(addr);
 }
-unsigned int fastcall ioread32(void __iomem *addr)
+unsigned int ioread32(void __iomem *addr)
 {
 	return readl(addr);
 }
-unsigned int fastcall ioread32be(void __iomem *addr)
+unsigned int ioread32be(void __iomem *addr)
 {
 	return in_be32(addr);
 }
@@ -38,23 +38,23 @@ EXPORT_SYMBOL(ioread16be);
 EXPORT_SYMBOL(ioread32);
 EXPORT_SYMBOL(ioread32be);
 
-void fastcall iowrite8(u8 val, void __iomem *addr)
+void iowrite8(u8 val, void __iomem *addr)
 {
 	writeb(val, addr);
 }
-void fastcall iowrite16(u16 val, void __iomem *addr)
+void iowrite16(u16 val, void __iomem *addr)
 {
 	writew(val, addr);
 }
-void fastcall iowrite16be(u16 val, void __iomem *addr)
+void iowrite16be(u16 val, void __iomem *addr)
 {
 	out_be16(addr, val);
 }
-void fastcall iowrite32(u32 val, void __iomem *addr)
+void iowrite32(u32 val, void __iomem *addr)
 {
 	writel(val, addr);
 }
-void fastcall iowrite32be(u32 val, void __iomem *addr)
+void iowrite32be(u32 val, void __iomem *addr)
 {
 	out_be32(addr, val);
 }
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 0bd8c7665834..34dc37e0e369 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -604,6 +604,8 @@ unsigned int irq_create_mapping(struct irq_host *host,
 	 */
 	virq = irq_find_mapping(host, hwirq);
 	if (virq != IRQ_NONE) {
+		if (host->ops->remap)
+			host->ops->remap(host, virq, hwirq);
 		pr_debug("irq: -> existing mapping on virq %d\n", virq);
 		return virq;
 	}
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 21fd2c662a99..519861da0423 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -311,6 +311,46 @@ _GLOBAL(real_writeb)
 	blr
 #endif /* defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE) */
 
+#ifdef CONFIG_PPC_PASEMI
+
+/* No support in all binutils for these yet, so use defines */
+#define LBZCIX(RT,RA,RB)  .long (0x7c0006aa|(RT<<21)|(RA<<16)|(RB << 11))
+#define STBCIX(RS,RA,RB)  .long (0x7c0007aa|(RS<<21)|(RA<<16)|(RB << 11))
+
+
+_GLOBAL(real_205_readb)
+	mfmsr	r7
+	ori	r0,r7,MSR_DR
+	xori	r0,r0,MSR_DR
+	sync
+	mtmsrd	r0
+	sync
+	isync
+	LBZCIX(r3,0,r3)
+	isync
+	mtmsrd	r7
+	sync
+	isync
+	blr
+
+_GLOBAL(real_205_writeb)
+	mfmsr	r7
+	ori	r0,r7,MSR_DR
+	xori	r0,r0,MSR_DR
+	sync
+	mtmsrd	r0
+	sync
+	isync
+	STBCIX(r3,0,r4)
+	isync
+	mtmsrd	r7
+	sync
+	isync
+	blr
+
+#endif /* CONFIG_PPC_PASEMI */
+
+
 #ifdef CONFIG_CPU_FREQ_PMAC64
 /*
  * SCOM access functions for 970 (FX only for now)
diff --git a/arch/powerpc/kernel/module_32.c b/arch/powerpc/kernel/module_32.c
index 8339fd609de0..07a89a398639 100644
--- a/arch/powerpc/kernel/module_32.c
+++ b/arch/powerpc/kernel/module_32.c
@@ -224,7 +224,12 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
 			/* Low half of the symbol */
 			*(uint16_t *)location = value;
 			break;
-		
+
+		case R_PPC_ADDR16_HI:
+			/* Higher half of the symbol */
+			*(uint16_t *)location = (value >> 16);
+			break;
+
 		case R_PPC_ADDR16_HA:
 			/* Sign-adjusted lower 16 bits: PPC ELF ABI says:
 			   (((x >> 16) + ((x & 0x8000) ? 1 : 0))) & 0xFFFF.
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index c54f3639c5ad..d8ef2e100505 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -1450,7 +1450,6 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
 		return -1;
 	}
 	pci_dev->irq = virq;
-	pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, virq);
 
 	return 0;
 }
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index 01f18c683407..6828df4afd99 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -1325,7 +1325,6 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
 	DBG(" -> mapped to linux irq %d\n", virq);
 
 	pci_dev->irq = virq;
-	pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, virq);
 
 	return 0;
 }
diff --git a/arch/powerpc/kernel/pmc.c b/arch/powerpc/kernel/pmc.c
index 3d8f6f44641e..24d7b7c99bb9 100644
--- a/arch/powerpc/kernel/pmc.c
+++ b/arch/powerpc/kernel/pmc.c
@@ -17,40 +17,25 @@
 #include <linux/module.h>
 
 #include <asm/processor.h>
+#include <asm/cputable.h>
 #include <asm/pmc.h>
 
-#if defined(CONFIG_FSL_BOOKE) && !defined(CONFIG_E200)
-static void dummy_perf(struct pt_regs *regs)
-{
-	unsigned int pmgc0 = mfpmr(PMRN_PMGC0);
-
-	pmgc0 &= ~PMGC0_PMIE;
-	mtpmr(PMRN_PMGC0, pmgc0);
-}
-#elif defined(CONFIG_PPC64) || defined(CONFIG_6xx)
-
-#ifndef MMCR0_PMAO
-#define MMCR0_PMAO	0
+#ifndef MMCR0_PMA0
+#define MMCR0_PMA0	0
 #endif
 
-/* Ensure exceptions are disabled */
 static void dummy_perf(struct pt_regs *regs)
 {
-	unsigned int mmcr0 = mfspr(SPRN_MMCR0);
-
-	mmcr0 &= ~(MMCR0_PMXE|MMCR0_PMAO);
-	mtspr(SPRN_MMCR0, mmcr0);
-}
+#if defined(CONFIG_FSL_BOOKE) && !defined(CONFIG_E200)
+	mtpmr(PMRN_PMGC0, mfpmr(PMRN_PMGC0) & ~PMGC0_PMIE);
+#elif defined(CONFIG_PPC64) || defined(CONFIG_6xx)
+	if (cur_cpu_spec->pmc_type == PPC_PMC_IBM)
+		mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~(MMCR0_PMXE|MMCR0_PMA0));
 #else
-/* Ensure exceptions are disabled */
-static void dummy_perf(struct pt_regs *regs)
-{
-	unsigned int mmcr0 = mfspr(SPRN_MMCR0);
-
-	mmcr0 &= ~(MMCR0_PMXE);
-	mtspr(SPRN_MMCR0, mmcr0);
-}
+	mtspr(SPRN_MMCR0, mfspr(SPRN_MMCR0) & ~MMCR0_PMXE);
 #endif
+}
+
 
 static DEFINE_SPINLOCK(pmc_owner_lock);
 static void *pmc_owner_caller; /* mostly for debugging */
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 95776b6af4e2..ecee596d28f6 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -44,6 +44,7 @@
 #include <asm/btext.h>
 #include <asm/div64.h>
 #include <asm/signal.h>
+#include <asm/dcr.h>
 
 #ifdef  CONFIG_8xx
 #include <asm/commproc.h>
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 1fc732a552db..3be52d693eca 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1221,8 +1221,7 @@ struct device_node *of_find_node_by_name(struct device_node *from,
 		if (np->name != NULL && strcasecmp(np->name, name) == 0
 		    && of_node_get(np))
 			break;
-	if (from)
-		of_node_put(from);
+	of_node_put(from);
 	read_unlock(&devtree_lock);
 	return np;
 }
@@ -1250,8 +1249,7 @@ struct device_node *of_find_node_by_type(struct device_node *from,
 		if (np->type != 0 && strcasecmp(np->type, type) == 0
 		    && of_node_get(np))
 			break;
-	if (from)
-		of_node_put(from);
+	of_node_put(from);
 	read_unlock(&devtree_lock);
 	return np;
 }
@@ -1285,8 +1283,7 @@ struct device_node *of_find_compatible_node(struct device_node *from,
 		if (device_is_compatible(np, compatible) && of_node_get(np))
 			break;
 	}
-	if (from)
-		of_node_put(from);
+	of_node_put(from);
 	read_unlock(&devtree_lock);
 	return np;
 }
@@ -1329,8 +1326,7 @@ struct device_node *of_find_node_by_phandle(phandle handle)
 	for (np = allnodes; np != 0; np = np->allnext)
 		if (np->linux_phandle == handle)
 			break;
-	if (np)
-		of_node_get(np);
+	of_node_get(np);
 	read_unlock(&devtree_lock);
 	return np;
 }
@@ -1353,8 +1349,7 @@ struct device_node *of_find_all_nodes(struct device_node *prev)
 	for (; np != 0; np = np->allnext)
 		if (of_node_get(np))
 			break;
-	if (prev)
-		of_node_put(prev);
+	of_node_put(prev);
 	read_unlock(&devtree_lock);
 	return np;
 }
@@ -1399,8 +1394,7 @@ struct device_node *of_get_next_child(const struct device_node *node,
 	for (; next != 0; next = next->sibling)
 		if (of_node_get(next))
 			break;
-	if (prev)
-		of_node_put(prev);
+	of_node_put(prev);
 	read_unlock(&devtree_lock);
 	return next;
 }
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 975102a020d9..cc44c7b975aa 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -532,16 +532,22 @@ void do_syscall_trace_enter(struct pt_regs *regs)
 	    && (current->ptrace & PT_PTRACED))
 		do_syscall_trace();
 
-	if (unlikely(current->audit_context))
-		audit_syscall_entry(
-#ifdef CONFIG_PPC32
-				    AUDIT_ARCH_PPC,
-#else
-				    test_thread_flag(TIF_32BIT)?AUDIT_ARCH_PPC:AUDIT_ARCH_PPC64,
+	if (unlikely(current->audit_context)) {
+#ifdef CONFIG_PPC64
+		if (!test_thread_flag(TIF_32BIT))
+			audit_syscall_entry(AUDIT_ARCH_PPC64,
+					    regs->gpr[0],
+					    regs->gpr[3], regs->gpr[4],
+					    regs->gpr[5], regs->gpr[6]);
+		else
 #endif
-				    regs->gpr[0],
-				    regs->gpr[3], regs->gpr[4],
-				    regs->gpr[5], regs->gpr[6]);
+			audit_syscall_entry(AUDIT_ARCH_PPC,
+					    regs->gpr[0],
+					    regs->gpr[3] & 0xffffffff,
+					    regs->gpr[4] & 0xffffffff,
+					    regs->gpr[5] & 0xffffffff,
+					    regs->gpr[6] & 0xffffffff);
+	}
 }
 
 void do_syscall_trace_leave(struct pt_regs *regs)
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 400ab2b946e7..d57818aea081 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -169,6 +169,11 @@ static ssize_t __attribute_used__ \
 	return count; \
 }
 
+
+/* Let's define all possible registers, we'll only hook up the ones
+ * that are implemented on the current processor
+ */
+
 SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
 SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
 SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
@@ -184,55 +189,87 @@ SYSFS_PMCSETUP(purr, SPRN_PURR);
 SYSFS_PMCSETUP(spurr, SPRN_SPURR);
 SYSFS_PMCSETUP(dscr, SPRN_DSCR);
 
-static SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0);
-static SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1);
+SYSFS_PMCSETUP(pa6t_pmc0, PA6T_SPRN_PMC0);
+SYSFS_PMCSETUP(pa6t_pmc1, PA6T_SPRN_PMC1);
+SYSFS_PMCSETUP(pa6t_pmc2, PA6T_SPRN_PMC2);
+SYSFS_PMCSETUP(pa6t_pmc3, PA6T_SPRN_PMC3);
+SYSFS_PMCSETUP(pa6t_pmc4, PA6T_SPRN_PMC4);
+SYSFS_PMCSETUP(pa6t_pmc5, PA6T_SPRN_PMC5);
+
+
 static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
-static SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1);
-static SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2);
-static SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3);
-static SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4);
-static SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5);
-static SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6);
-static SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7);
-static SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8);
-static SYSDEV_ATTR(purr, 0600, show_purr, NULL);
 static SYSDEV_ATTR(spurr, 0600, show_spurr, NULL);
 static SYSDEV_ATTR(dscr, 0600, show_dscr, store_dscr);
+static SYSDEV_ATTR(purr, 0600, show_purr, store_purr);
+
+static struct sysdev_attribute ibm_common_attrs[] = {
+	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
+	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
+};
+
+static struct sysdev_attribute ibm_pmc_attrs[] = {
+	_SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1),
+	_SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2),
+	_SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3),
+	_SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4),
+	_SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5),
+	_SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6),
+	_SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7),
+	_SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8),
+};
+
+static struct sysdev_attribute pa6t_attrs[] = {
+	_SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0),
+	_SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1),
+	_SYSDEV_ATTR(pmc0, 0600, show_pa6t_pmc0, store_pa6t_pmc0),
+	_SYSDEV_ATTR(pmc1, 0600, show_pa6t_pmc1, store_pa6t_pmc1),
+	_SYSDEV_ATTR(pmc2, 0600, show_pa6t_pmc2, store_pa6t_pmc2),
+	_SYSDEV_ATTR(pmc3, 0600, show_pa6t_pmc3, store_pa6t_pmc3),
+	_SYSDEV_ATTR(pmc4, 0600, show_pa6t_pmc4, store_pa6t_pmc4),
+	_SYSDEV_ATTR(pmc5, 0600, show_pa6t_pmc5, store_pa6t_pmc5),
+};
+
 
 static void register_cpu_online(unsigned int cpu)
 {
 	struct cpu *c = &per_cpu(cpu_devices, cpu);
 	struct sys_device *s = &c->sysdev;
+	struct sysdev_attribute *attrs, *pmc_attrs;
+	int i, nattrs;
 
 	if (!firmware_has_feature(FW_FEATURE_ISERIES) &&
 			cpu_has_feature(CPU_FTR_SMT))
 		sysdev_create_file(s, &attr_smt_snooze_delay);
 
 	/* PMC stuff */
+	switch (cur_cpu_spec->pmc_type) {
+	case PPC_PMC_IBM:
+		attrs = ibm_common_attrs;
+		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
+		pmc_attrs = ibm_pmc_attrs;
+		break;
+	case PPC_PMC_PA6T:
+		/* PA Semi starts counting at PMC0 */
+		attrs = pa6t_attrs;
+		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
+		pmc_attrs = NULL;
+		break;
+	default:
+		attrs = NULL;
+		nattrs = 0;
+		pmc_attrs = NULL;
+	}
+
+	for (i = 0; i < nattrs; i++)
+		sysdev_create_file(s, &attrs[i]);
 
-	sysdev_create_file(s, &attr_mmcr0);
-	sysdev_create_file(s, &attr_mmcr1);
+	if (pmc_attrs)
+		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
+			sysdev_create_file(s, &pmc_attrs[i]);
 
 	if (cpu_has_feature(CPU_FTR_MMCRA))
 		sysdev_create_file(s, &attr_mmcra);
 
-	if (cur_cpu_spec->num_pmcs >= 1)
-		sysdev_create_file(s, &attr_pmc1);
-	if (cur_cpu_spec->num_pmcs >= 2)
-		sysdev_create_file(s, &attr_pmc2);
-	if (cur_cpu_spec->num_pmcs >= 3)
-		sysdev_create_file(s, &attr_pmc3);
-	if (cur_cpu_spec->num_pmcs >= 4)
-		sysdev_create_file(s, &attr_pmc4);
-	if (cur_cpu_spec->num_pmcs >= 5)
-		sysdev_create_file(s, &attr_pmc5);
-	if (cur_cpu_spec->num_pmcs >= 6)
-		sysdev_create_file(s, &attr_pmc6);
-	if (cur_cpu_spec->num_pmcs >= 7)
-		sysdev_create_file(s, &attr_pmc7);
-	if (cur_cpu_spec->num_pmcs >= 8)
-		sysdev_create_file(s, &attr_pmc8);
-
 	if (cpu_has_feature(CPU_FTR_PURR))
 		sysdev_create_file(s, &attr_purr);
 
@@ -248,6 +285,8 @@ static void unregister_cpu_online(unsigned int cpu)
 {
 	struct cpu *c = &per_cpu(cpu_devices, cpu);
 	struct sys_device *s = &c->sysdev;
+	struct sysdev_attribute *attrs, *pmc_attrs;
+	int i, nattrs;
 
 	BUG_ON(!c->hotpluggable);
 
@@ -256,30 +295,34 @@ static void unregister_cpu_online(unsigned int cpu)
 		sysdev_remove_file(s, &attr_smt_snooze_delay);
 
 	/* PMC stuff */
+	switch (cur_cpu_spec->pmc_type) {
+	case PPC_PMC_IBM:
+		attrs = ibm_common_attrs;
+		nattrs = sizeof(ibm_common_attrs) / sizeof(struct sysdev_attribute);
+		pmc_attrs = ibm_pmc_attrs;
+		break;
+	case PPC_PMC_PA6T:
+		/* PA Semi starts counting at PMC0 */
+		attrs = pa6t_attrs;
+		nattrs = sizeof(pa6t_attrs) / sizeof(struct sysdev_attribute);
+		pmc_attrs = NULL;
+		break;
+	default:
+		attrs = NULL;
+		nattrs = 0;
+		pmc_attrs = NULL;
+	}
 
-	sysdev_remove_file(s, &attr_mmcr0);
-	sysdev_remove_file(s, &attr_mmcr1);
+	for (i = 0; i < nattrs; i++)
+		sysdev_remove_file(s, &attrs[i]);
+
+	if (pmc_attrs)
+		for (i = 0; i < cur_cpu_spec->num_pmcs; i++)
+			sysdev_remove_file(s, &pmc_attrs[i]);
 
 	if (cpu_has_feature(CPU_FTR_MMCRA))
 		sysdev_remove_file(s, &attr_mmcra);
 
-	if (cur_cpu_spec->num_pmcs >= 1)
-		sysdev_remove_file(s, &attr_pmc1);
-	if (cur_cpu_spec->num_pmcs >= 2)
-		sysdev_remove_file(s, &attr_pmc2);
-	if (cur_cpu_spec->num_pmcs >= 3)
-		sysdev_remove_file(s, &attr_pmc3);
-	if (cur_cpu_spec->num_pmcs >= 4)
-		sysdev_remove_file(s, &attr_pmc4);
-	if (cur_cpu_spec->num_pmcs >= 5)
-		sysdev_remove_file(s, &attr_pmc5);
-	if (cur_cpu_spec->num_pmcs >= 6)
-		sysdev_remove_file(s, &attr_pmc6);
-	if (cur_cpu_spec->num_pmcs >= 7)
-		sysdev_remove_file(s, &attr_pmc7);
-	if (cur_cpu_spec->num_pmcs >= 8)
-		sysdev_remove_file(s, &attr_pmc8);
-
 	if (cpu_has_feature(CPU_FTR_PURR))
 		sysdev_remove_file(s, &attr_purr);
 
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 535f50665647..6915b91868b8 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -174,7 +174,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)
 	 * generate the same exception over and over again and we get
 	 * nowhere.  Better to kill it and let the kernel panic.
 	 */
-	if (current->pid == 1) {
+	if (is_init(current)) {
 		__sighandler_t handler;
 
 		spin_lock_irq(&current->sighand->siglock);
diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c
index 5730906b23d5..8f5afdbad0d5 100644
--- a/arch/powerpc/kernel/udbg.c
+++ b/arch/powerpc/kernel/udbg.c
@@ -45,6 +45,10 @@ void __init udbg_early_init(void)
 #elif defined(CONFIG_PPC_EARLY_DEBUG_ISERIES)
 	/* For iSeries - hit Ctrl-x Ctrl-x to see the output */
 	udbg_init_iseries();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_BEAT)
+	udbg_init_debug_beat();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_PAS_REALMODE)
+	udbg_init_pas_realmode();
 #endif
 }
 
diff --git a/arch/powerpc/kernel/udbg_16550.c b/arch/powerpc/kernel/udbg_16550.c
index 2d17f2b8eda7..e738f93b42fe 100644
--- a/arch/powerpc/kernel/udbg_16550.c
+++ b/arch/powerpc/kernel/udbg_16550.c
@@ -14,6 +14,8 @@
 
 extern u8 real_readb(volatile u8 __iomem  *addr);
 extern void real_writeb(u8 data, volatile u8 __iomem *addr);
+extern u8 real_205_readb(volatile u8 __iomem  *addr);
+extern void real_205_writeb(u8 data, volatile u8 __iomem *addr);
 
 struct NS16550 {
 	/* this struct must be packed */
@@ -167,3 +169,25 @@ void __init udbg_init_maple_realmode(void)
 	udbg_getc_poll = NULL;
 }
 #endif /* CONFIG_PPC_MAPLE */
+
+#ifdef CONFIG_PPC_PASEMI
+void udbg_pas_real_putc(char c)
+{
+	if (udbg_comport) {
+		while ((real_205_readb(&udbg_comport->lsr) & LSR_THRE) == 0)
+			/* wait for idle */;
+		real_205_writeb(c, &udbg_comport->thr); eieio();
+		if (c == '\n')
+			udbg_pas_real_putc('\r');
+	}
+}
+
+void udbg_init_pas_realmode(void)
+{
+	udbg_comport = (volatile struct NS16550 __iomem *)0xfcff03f8;
+
+	udbg_putc = udbg_pas_real_putc;
+	udbg_getc = NULL;
+	udbg_getc_poll = NULL;
+}
+#endif /* CONFIG_PPC_MAPLE */
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index a80f8f1d2e5d..2968ffeafdb6 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -199,10 +199,8 @@ EXPORT_SYMBOL(vio_unregister_driver);
 /* vio_dev refcount hit 0 */
 static void __devinit vio_dev_release(struct device *dev)
 {
-	if (dev->archdata.of_node) {
-		/* XXX should free TCE table */
-		of_node_put(dev->archdata.of_node);
-	}
+	/* XXX should free TCE table */
+	of_node_put(dev->archdata.of_node);
 	kfree(to_vio_dev(dev));
 }