Merge branch 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-s…

…core * 'for-linus' of git://gitserver.sunplusct.com/linux-2.6-score: score: include asm-generic/param.h in asm/delay.h. score: fixed pfn_valid define. score: add flush_dcahce_page and PG_dcache_dirty define
mariux64 · Dec 17, 2009 · a377d18 · a377d18
2 parents 22a8059 + ef8355c
commit a377d18
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Showing 6 changed files with 31 additions and 9 deletions.
diff --git a/arch/score/include/asm/cacheflush.h b/arch/score/include/asm/cacheflush.h
@@ -14,10 +14,12 @@ extern void flush_cache_sigtramp(unsigned long addr);
 extern void flush_icache_all(void);
 extern void flush_icache_range(unsigned long start, unsigned long end);
 extern void flush_dcache_range(unsigned long start, unsigned long end);
+extern void flush_dcache_page(struct page *page);
+
+#define PG_dcache_dirty         PG_arch_1
 
 #define flush_cache_dup_mm(mm)			do {} while (0)
 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
-#define flush_dcache_page(page)			do {} while (0)
 #define flush_dcache_mmap_lock(mapping)		do {} while (0)
 #define flush_dcache_mmap_unlock(mapping)	do {} while (0)
 #define flush_cache_vmap(start, end)		do {} while (0)

diff --git a/arch/score/include/asm/delay.h b/arch/score/include/asm/delay.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_SCORE_DELAY_H
 #define _ASM_SCORE_DELAY_H
 
+#include <asm-generic/param.h>
+
 static inline void __delay(unsigned long loops)
 {
 	/* 3 cycles per loop. */

diff --git a/arch/score/include/asm/page.h b/arch/score/include/asm/page.h
@@ -74,7 +74,7 @@ extern unsigned long max_pfn;
 #define page_to_bus(page)	(page_to_phys(page))
 #define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
 
-#define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_mapnr)
+#define pfn_valid(pfn)		(((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
 
 #define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
 

diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
@@ -49,6 +49,7 @@ static void __init bootmem_init(void)
 
 	min_low_pfn = PFN_UP(MEMORY_START);
 	max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
+	max_mapnr = max_low_pfn - min_low_pfn;
 
 	/* Initialize the boot-time allocator with low memory only. */
 	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,

diff --git a/arch/score/mm/cache.c b/arch/score/mm/cache.c
@@ -29,6 +29,7 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/sched.h>
+#include <linux/fs.h>
 
 #include <asm/mmu_context.h>
 
@@ -51,6 +52,27 @@ static void flush_data_cache_page(unsigned long addr)
 	}
 }
 
+void flush_dcache_page(struct page *page)
+{
+	struct address_space *mapping = page_mapping(page);
+	unsigned long addr;
+
+	if (PageHighMem(page))
+		return;
+	if (mapping && !mapping_mapped(mapping)) {
+		set_bit(PG_dcache_dirty, &(page)->flags);
+		return;
+	}
+
+	/*
+	 * We could delay the flush for the !page_mapping case too.  But that
+	 * case is for exec env/arg pages and those are %99 certainly going to
+	 * get faulted into the tlb (and thus flushed) anyways.
+	 */
+	addr = (unsigned long) page_address(page);
+	flush_data_cache_page(addr);
+}
+
 /* called by update_mmu_cache. */
 void __update_cache(struct vm_area_struct *vma, unsigned long address,
 		pte_t pte)
@@ -63,11 +85,11 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address,
 	if (unlikely(!pfn_valid(pfn)))
 		return;
 	page = pfn_to_page(pfn);
-	if (page_mapping(page) && test_bit(PG_arch_1, &page->flags)) {
+	if (page_mapping(page) && test_bit(PG_dcache_dirty, &(page)->flags)) {
 		addr = (unsigned long) page_address(page);
 		if (exec)
 			flush_data_cache_page(addr);
-		clear_bit(PG_arch_1, &page->flags);
+		clear_bit(PG_dcache_dirty, &(page)->flags);
 	}
 }
 

diff --git a/arch/score/mm/init.c b/arch/score/mm/init.c
@@ -83,7 +83,6 @@ void __init mem_init(void)
 	unsigned long codesize, reservedpages, datasize, initsize;
 	unsigned long tmp, ram = 0;
 
-	max_mapnr = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
 	totalram_pages += free_all_bootmem();
 	totalram_pages -= setup_zero_page();	/* Setup zeroed pages. */
@@ -101,10 +100,6 @@ void __init mem_init(void)
 	datasize = (unsigned long) &_edata - (unsigned long) &_etext;
 	initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
-	kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
-	kclist_add(&kcore_vmalloc, (void *) VMALLOC_START,
-			VMALLOC_END - VMALLOC_START);
-
 	printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
 			"%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
 			(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),