Merge branch 'for-2.6.24' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge

10 files changed, 68 insertions, 23 deletions

diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S
index fba7ca17a67..b19bfef2034 100644
--- a/arch/ppc/kernel/entry.S
+++ b/arch/ppc/kernel/entry.S
@@ -244,6 +244,13 @@ syscall_exit_cont:
 	andis.	r10,r0,DBCR0_IC@h
 	bnel-	load_dbcr0
 #endif
+#ifdef CONFIG_44x
+	lis	r4,icache_44x_need_flush@ha
+	lwz	r5,icache_44x_need_flush@l(r4)
+	cmplwi	cr0,r5,0
+	bne-	2f
+1:
+#endif /* CONFIG_44x */
 	stwcx.	r0,0,r1			/* to clear the reservation */
 	lwz	r4,_LINK(r1)
 	lwz	r5,_CCR(r1)
@@ -258,6 +265,12 @@ syscall_exit_cont:
 	mtspr	SPRN_SRR1,r8
 	SYNC
 	RFI
+#ifdef CONFIG_44x
+2:	li	r7,0
+	iccci	r0,r0
+	stw	r7,icache_44x_need_flush@l(r4)
+	b	1b
+#endif  /* CONFIG_44x */
 
 66:	li	r3,-ENOSYS
 	b	ret_from_syscall
@@ -679,6 +692,16 @@ resume_kernel:
 
 	/* interrupts are hard-disabled at this point */
 restore:
+#ifdef CONFIG_44x
+	lis	r4,icache_44x_need_flush@ha
+	lwz	r5,icache_44x_need_flush@l(r4)
+	cmplwi	cr0,r5,0
+	beq+	1f
+	li	r6,0
+	iccci	r0,r0
+	stw	r6,icache_44x_need_flush@l(r4)
+1:
+#endif  /* CONFIG_44x */
 	lwz	r0,GPR0(r1)
 	lwz	r2,GPR2(r1)
 	REST_4GPRS(3, r1)
diff --git a/arch/ppc/kernel/misc.S b/arch/ppc/kernel/misc.S
index a22e1f4d94c..e0c850d85c5 100644
--- a/arch/ppc/kernel/misc.S
+++ b/arch/ppc/kernel/misc.S
@@ -224,7 +224,16 @@ _GLOBAL(_tlbia)
  */
 _GLOBAL(_tlbie)
 #if defined(CONFIG_40x)
+	/* We run the search with interrupts disabled because we have to change
+	 * the PID and I don't want to preempt when that happens.
+	 */
+	mfmsr	r5
+	mfspr	r6,SPRN_PID
+	wrteei	0
+	mtspr	SPRN_PID,r4
 	tlbsx.	r3, 0, r3
+	mtspr	SPRN_PID,r6
+	wrtee	r5
 	bne	10f
 	sync
 	/* There are only 64 TLB entries, so r3 < 64, which means bit 25 is clear.
@@ -234,22 +243,21 @@ _GLOBAL(_tlbie)
 	isync
 10:
 #elif defined(CONFIG_44x)
-	mfspr	r4,SPRN_MMUCR
-	mfspr	r5,SPRN_PID			/* Get PID */
-	rlwimi	r4,r5,0,24,31			/* Set TID */
+	mfspr	r5,SPRN_MMUCR
+	rlwimi	r5,r4,0,24,31			/* Set TID */
 
 	/* We have to run the search with interrupts disabled, even critical
 	 * and debug interrupts (in fact the only critical exceptions we have
 	 * are debug and machine check).  Otherwise  an interrupt which causes
 	 * a TLB miss can clobber the MMUCR between the mtspr and the tlbsx. */
-	mfmsr	r5
+	mfmsr	r4
 	lis	r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@ha
 	addi	r6,r6,(MSR_EE|MSR_CE|MSR_ME|MSR_DE)@l
-	andc	r6,r5,r6
+	andc	r6,r4,r6
 	mtmsr	r6
-	mtspr	SPRN_MMUCR,r4
+	mtspr	SPRN_MMUCR,r5
 	tlbsx.	r3, 0, r3
-	mtmsr	r5
+	mtmsr	r4
 	bne	10f
 	sync
 	/* There are only 64 TLB entries, so r3 < 64,
@@ -491,12 +499,21 @@ END_FTR_SECTION_IFSET(CPU_FTR_COHERENT_ICACHE)
 	addi	r3,r3,L1_CACHE_BYTES
 	bdnz	0b
 	sync
+#ifndef CONFIG_44x
+	/* We don't flush the icache on 44x. Those have a virtual icache
+	 * and we don't have access to the virtual address here (it's
+	 * not the page vaddr but where it's mapped in user space). The
+	 * flushing of the icache on these is handled elsewhere, when
+	 * a change in the address space occurs, before returning to
+	 * user space
+	 */
 	mtctr	r4
 1:	icbi	0,r6
 	addi	r6,r6,L1_CACHE_BYTES
 	bdnz	1b
 	sync
 	isync
+#endif /* CONFIG_44x */
 	blr
 
 /*
diff --git a/arch/ppc/mm/44x_mmu.c b/arch/ppc/mm/44x_mmu.c
index 0a0a0487b33..6536a25cfcb 100644
--- a/arch/ppc/mm/44x_mmu.c
+++ b/arch/ppc/mm/44x_mmu.c
@@ -61,6 +61,7 @@ extern char etext[], _stext[];
  */
 unsigned int tlb_44x_index = 0;
 unsigned int tlb_44x_hwater = 62;
+int icache_44x_need_flush;
 
 /*
  * "Pins" a 256MB TLB entry in AS0 for kernel lowmem
diff --git a/arch/ppc/mm/4xx_mmu.c b/arch/ppc/mm/4xx_mmu.c
index 838e09db71d..ea785dbaac7 100644
--- a/arch/ppc/mm/4xx_mmu.c
+++ b/arch/ppc/mm/4xx_mmu.c
@@ -99,13 +99,12 @@ unsigned long __init mmu_mapin_ram(void)
 
 	v = KERNELBASE;
 	p = PPC_MEMSTART;
-	s = 0;
+	s = total_lowmem;
 
-	if (__map_without_ltlbs) {
-		return s;
-	}
+	if (__map_without_ltlbs)
+		return 0;
 
-	while (s <= (total_lowmem - LARGE_PAGE_SIZE_16M)) {
+	while (s >= LARGE_PAGE_SIZE_16M) {
 		pmd_t *pmdp;
 		unsigned long val = p | _PMD_SIZE_16M | _PAGE_HWEXEC | _PAGE_HWWRITE;
 
@@ -117,10 +116,10 @@ unsigned long __init mmu_mapin_ram(void)
 
 		v += LARGE_PAGE_SIZE_16M;
 		p += LARGE_PAGE_SIZE_16M;
-		s += LARGE_PAGE_SIZE_16M;
+		s -= LARGE_PAGE_SIZE_16M;
 	}
 
-	while (s <= (total_lowmem - LARGE_PAGE_SIZE_4M)) {
+	while (s >= LARGE_PAGE_SIZE_4M) {
 		pmd_t *pmdp;
 		unsigned long val = p | _PMD_SIZE_4M | _PAGE_HWEXEC | _PAGE_HWWRITE;
 
@@ -129,8 +128,8 @@ unsigned long __init mmu_mapin_ram(void)
 
 		v += LARGE_PAGE_SIZE_4M;
 		p += LARGE_PAGE_SIZE_4M;
-		s += LARGE_PAGE_SIZE_4M;
+		s -= LARGE_PAGE_SIZE_4M;
 	}
 
-	return s;
+	return total_lowmem - s;
 }
diff --git a/arch/ppc/mm/fault.c b/arch/ppc/mm/fault.c
index 254c23b755e..36c0e7529ed 100644
--- a/arch/ppc/mm/fault.c
+++ b/arch/ppc/mm/fault.c
@@ -227,7 +227,7 @@ good_area:
 					set_bit(PG_arch_1, &page->flags);
 				}
 				pte_update(ptep, 0, _PAGE_HWEXEC);
-				_tlbie(address);
+				_tlbie(address, mm->context.id);
 				pte_unmap_unlock(ptep, ptl);
 				up_read(&mm->mmap_sem);
 				return 0;
diff --git a/arch/ppc/mm/mmu_decl.h b/arch/ppc/mm/mmu_decl.h
index 540f3292b22..f1d4f2109a9 100644
--- a/arch/ppc/mm/mmu_decl.h
+++ b/arch/ppc/mm/mmu_decl.h
@@ -54,12 +54,12 @@ extern unsigned int num_tlbcam_entries;
 #define mmu_mapin_ram()		(0UL)
 
 #elif defined(CONFIG_4xx)
-#define flush_HPTE(X, va, pg)	_tlbie(va)
+#define flush_HPTE(pid, va, pg)	_tlbie(va, pid)
 extern void MMU_init_hw(void);
 extern unsigned long mmu_mapin_ram(void);
 
 #elif defined(CONFIG_FSL_BOOKE)
-#define flush_HPTE(X, va, pg)	_tlbie(va)
+#define flush_HPTE(pid, va, pg)	_tlbie(va, pid)
 extern void MMU_init_hw(void);
 extern unsigned long mmu_mapin_ram(void);
 extern void adjust_total_lowmem(void);
diff --git a/arch/ppc/platforms/4xx/ebony.c b/arch/ppc/platforms/4xx/ebony.c
index 05d7184d7e1..453643a0eee 100644
--- a/arch/ppc/platforms/4xx/ebony.c
+++ b/arch/ppc/platforms/4xx/ebony.c
@@ -236,7 +236,7 @@ ebony_early_serial_map(void)
 	gen550_init(0, &port);
 
 	/* Purge TLB entry added in head_44x.S for early serial access */
-	_tlbie(UART0_IO_BASE);
+	_tlbie(UART0_IO_BASE, 0);
 #endif
 
 	port.membase = ioremap64(PPC440GP_UART1_ADDR, 8);
diff --git a/arch/ppc/platforms/4xx/luan.c b/arch/ppc/platforms/4xx/luan.c
index 4b169610f15..b79ebb8a3e6 100644
--- a/arch/ppc/platforms/4xx/luan.c
+++ b/arch/ppc/platforms/4xx/luan.c
@@ -230,9 +230,14 @@ luan_setup_hoses(void)
 
 	/* Allocate hoses for PCIX1 and PCIX2 */
 	hose1 = pcibios_alloc_controller();
+	if (!hose1)
+		return;
+
 	hose2 = pcibios_alloc_controller();
-	if (!hose1 || !hose2)
+	if (!hose2) {
+		pcibios_free_controller(hose1);
 		return;
+	}
 
 	/* Setup PCIX1 */
 	hose1->first_busno = 0;
diff --git a/arch/ppc/platforms/4xx/ocotea.c b/arch/ppc/platforms/4xx/ocotea.c
index fd0f971881d..28a712cd480 100644
--- a/arch/ppc/platforms/4xx/ocotea.c
+++ b/arch/ppc/platforms/4xx/ocotea.c
@@ -259,7 +259,7 @@ ocotea_early_serial_map(void)
 	gen550_init(0, &port);
 
 	/* Purge TLB entry added in head_44x.S for early serial access */
-	_tlbie(UART0_IO_BASE);
+	_tlbie(UART0_IO_BASE, 0);
 #endif
 
 	port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);
diff --git a/arch/ppc/platforms/4xx/taishan.c b/arch/ppc/platforms/4xx/taishan.c
index 888c492b4a4..f6a0c6650f3 100644
--- a/arch/ppc/platforms/4xx/taishan.c
+++ b/arch/ppc/platforms/4xx/taishan.c
@@ -316,7 +316,7 @@ taishan_early_serial_map(void)
 	gen550_init(0, &port);
 
 	/* Purge TLB entry added in head_44x.S for early serial access */
-	_tlbie(UART0_IO_BASE);
+	_tlbie(UART0_IO_BASE, 0);
 #endif
 
 	port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);