Merge ../linus/

4 files changed, 15 insertions, 199 deletions

diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 59f47d4c2df..ffe73ba2bf1 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -51,4 +51,4 @@ obj-$(CONFIG_CPU_ARM1026)	+= proc-arm1026.o
 obj-$(CONFIG_CPU_SA110)		+= proc-sa110.o
 obj-$(CONFIG_CPU_SA1100)	+= proc-sa1100.o
 obj-$(CONFIG_CPU_XSCALE)	+= proc-xscale.o
-obj-$(CONFIG_CPU_V6)		+= proc-v6.o blockops.o
+obj-$(CONFIG_CPU_V6)		+= proc-v6.o
diff --git a/arch/arm/mm/blockops.c b/arch/arm/mm/blockops.c
deleted file mode 100644
index 4f5ee2d0899..00000000000
--- a/arch/arm/mm/blockops.c
+++ /dev/null
@@ -1,185 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/mm.h>
-
-#include <asm/memory.h>
-#include <asm/ptrace.h>
-#include <asm/cacheflush.h>
-#include <asm/traps.h>
-
-extern struct cpu_cache_fns blk_cache_fns;
-
-#define HARVARD_CACHE
-
-/*
- *	blk_flush_kern_dcache_page(kaddr)
- *
- *	Ensure that the data held in the page kaddr is written back
- *	to the page in question.
- *
- *	- kaddr   - kernel address (guaranteed to be page aligned)
- */
-static void __attribute__((naked))
-blk_flush_kern_dcache_page(void *kaddr)
-{
-	asm(
-	"add	r1, r0, %0							\n\
-	sub	r1, r1, %1							\n\
-1:	.word	0xec401f0e	@ mcrr	p15, 0, r0, r1, c14, 0	@ blocking	\n\
-	mov	r0, #0								\n\
-	mcr	p15, 0, r0, c7, c5, 0						\n\
-	mcr	p15, 0, r0, c7, c10, 4						\n\
-	mov	pc, lr"
-	:
-	: "I" (PAGE_SIZE), "I" (L1_CACHE_BYTES));
-}
-
-/*
- *	blk_dma_inv_range(start,end)
- *
- *	Invalidate the data cache within the specified region; we will
- *	be performing a DMA operation in this region and we want to
- *	purge old data in the cache.
- *
- *	- start   - virtual start address of region
- *	- end     - virtual end address of region
- */
-static void __attribute__((naked))
-blk_dma_inv_range_unified(unsigned long start, unsigned long end)
-{
-	asm(
-	"tst	r0, %0								\n\
-	mcrne	p15, 0, r0, c7, c11, 1		@ clean unified line		\n\
-	tst	r1, %0								\n\
-	mcrne	p15, 0, r1, c7, c15, 1		@ clean & invalidate unified line\n\
-	.word	0xec401f06	@ mcrr	p15, 0, r1, r0, c6, 0	@ blocking	\n\
-	mov	r0, #0								\n\
-	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer		\n\
-	mov	pc, lr"
-	:
-	: "I" (L1_CACHE_BYTES - 1));
-}
-
-static void __attribute__((naked))
-blk_dma_inv_range_harvard(unsigned long start, unsigned long end)
-{
-	asm(
-	"tst	r0, %0								\n\
-	mcrne	p15, 0, r0, c7, c10, 1		@ clean D line			\n\
-	tst	r1, %0								\n\
-	mcrne	p15, 0, r1, c7, c14, 1		@ clean & invalidate D line	\n\
-	.word	0xec401f06	@ mcrr	p15, 0, r1, r0, c6, 0	@ blocking	\n\
-	mov	r0, #0								\n\
-	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer		\n\
-	mov	pc, lr"
-	:
-	: "I" (L1_CACHE_BYTES - 1));
-}
-
-/*
- *	blk_dma_clean_range(start,end)
- *	- start   - virtual start address of region
- *	- end     - virtual end address of region
- */
-static void __attribute__((naked))
-blk_dma_clean_range(unsigned long start, unsigned long end)
-{
-	asm(
-	".word	0xec401f0c	@ mcrr	p15, 0, r1, r0, c12, 0	@ blocking	\n\
-	mov	r0, #0								\n\
-	mcr	p15, 0, r0, c7, c10, 4		@ drain write buffer		\n\
-	mov	pc, lr");
-}
-
-/*
- *	blk_dma_flush_range(start,end)
- *	- start   - virtual start address of region
- *	- end     - virtual end address of region
- */
-static void __attribute__((naked))
-blk_dma_flush_range(unsigned long start, unsigned long end)
-{
-	asm(
-	".word	0xec401f0e	@ mcrr	p15, 0, r1, r0, c14, 0	@ blocking	\n\
-	mov	pc, lr");
-}
-
-static int blockops_trap(struct pt_regs *regs, unsigned int instr)
-{
-	regs->ARM_r4 |= regs->ARM_r2;
-	regs->ARM_pc += 4;
-	return 0;
-}
-
-static char *func[] = {
-	"Prefetch data range",
-	"Clean+Invalidate data range",
-	"Clean data range",
-	"Invalidate data range",
-	"Invalidate instr range"
-};
-
-static struct undef_hook blockops_hook __initdata = {
-	.instr_mask	= 0x0fffffd0,
-	.instr_val	= 0x0c401f00,
-	.cpsr_mask	= PSR_T_BIT,
-	.cpsr_val	= 0,
-	.fn		= blockops_trap,
-};
-
-static int __init blockops_check(void)
-{
-	register unsigned int err asm("r4") = 0;
-	unsigned int err_pos = 1;
-	unsigned int cache_type;
-	int i;
-
-	asm("mrc p15, 0, %0, c0, c0, 1" : "=r" (cache_type));
-
-	printk("Checking V6 block cache operations:\n");
-	register_undef_hook(&blockops_hook);
-
-	__asm__ ("mov	r0, %0\n\t"
-		"mov	r1, %1\n\t"
-		"mov	r2, #1\n\t"
-		".word	0xec401f2c @ mcrr p15, 0, r1, r0, c12, 2\n\t"
-		"mov	r2, #2\n\t"
-		".word	0xec401f0e @ mcrr p15, 0, r1, r0, c14, 0\n\t"
-		"mov	r2, #4\n\t"
-		".word	0xec401f0c @ mcrr p15, 0, r1, r0, c12, 0\n\t"
-		"mov	r2, #8\n\t"
-		".word	0xec401f06 @ mcrr p15, 0, r1, r0, c6, 0\n\t"
-		"mov	r2, #16\n\t"
-		".word	0xec401f05 @ mcrr p15, 0, r1, r0, c5, 0\n\t"
-		:
-		: "r" (PAGE_OFFSET), "r" (PAGE_OFFSET + 128)
-		: "r0", "r1", "r2");
-
-	unregister_undef_hook(&blockops_hook);
-
-	for (i = 0; i < ARRAY_SIZE(func); i++, err_pos <<= 1)
-		printk("%30s: %ssupported\n", func[i], err & err_pos ? "not " : "");
-
-	if ((err & 8) == 0) {
-		printk(" --> Using %s block cache invalidate\n",
-			cache_type & (1 << 24) ? "harvard" : "unified");
-		if (cache_type & (1 << 24))
-			cpu_cache.dma_inv_range = blk_dma_inv_range_harvard;
-		else
-			cpu_cache.dma_inv_range = blk_dma_inv_range_unified;
-	}
-	if ((err & 4) == 0) {
-		printk(" --> Using block cache clean\n");
-		cpu_cache.dma_clean_range        = blk_dma_clean_range;
-	}
-	if ((err & 2) == 0) {
-		printk(" --> Using block cache clean+invalidate\n");
-		cpu_cache.dma_flush_range        = blk_dma_flush_range;
-		cpu_cache.flush_kern_dcache_page = blk_flush_kern_dcache_page;
-	}
-
-	return 0;
-}
-
-__initcall(blockops_check);
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index c168f322ef8..8b276ee38ac 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -420,7 +420,8 @@ static void __init bootmem_init(struct meminfo *mi)
  * Set up device the mappings.  Since we clear out the page tables for all
  * mappings above VMALLOC_END, we will remove any debug device mappings.
  * This means you have to be careful how you debug this function, or any
- * called function.  (Do it by code inspection!)
+ * called function.  This means you can't use any function or debugging
+ * method which may touch any device, otherwise the kernel _will_ crash.
  */
 static void __init devicemaps_init(struct machine_desc *mdesc)
 {
@@ -428,6 +429,12 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 	unsigned long addr;
 	void *vectors;
 
+	/*
+	 * Allocate the vector page early.
+	 */
+	vectors = alloc_bootmem_low_pages(PAGE_SIZE);
+	BUG_ON(!vectors);
+
 	for (addr = VMALLOC_END; addr; addr += PGDIR_SIZE)
 		pmd_clear(pmd_off_k(addr));
 
@@ -461,12 +468,6 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 	create_mapping(&map);
 #endif
 
-	flush_cache_all();
-	local_flush_tlb_all();
-
-	vectors = alloc_bootmem_low_pages(PAGE_SIZE);
-	BUG_ON(!vectors);
-
 	/*
 	 * Create a mapping for the machine vectors at the high-vectors
 	 * location (0xffff0000).  If we aren't using high-vectors, also
@@ -491,12 +492,13 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 		mdesc->map_io();
 
 	/*
-	 * Finally flush the tlb again - this ensures that we're in a
-	 * consistent state wrt the writebuffer if the writebuffer needs
-	 * draining.  After this point, we can start to touch devices
-	 * again.
+	 * Finally flush the caches and tlb to ensure that we're in a
+	 * consistent state wrt the writebuffer.  This also ensures that
+	 * any write-allocated cache lines in the vector page are written
+	 * back.  After this point, we can start to touch devices again.
 	 */
 	local_flush_tlb_all();
+	flush_cache_all();
 }
 
 /*
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 0f128c28fee..10901398e4a 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -130,8 +130,7 @@ remap_area_pages(unsigned long start, unsigned long phys_addr,
  * mapping.  See include/asm-arm/proc-armv/pgtable.h for more information.
  */
 void __iomem *
-__ioremap(unsigned long phys_addr, size_t size, unsigned long flags,
-	  unsigned long align)
+__ioremap(unsigned long phys_addr, size_t size, unsigned long flags)
 {
 	void * addr;
 	struct vm_struct * area;