From ecba1060583635ab55092072441ff903b5e9a659 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Sat, 15 Aug 2009 11:05:42 +0900 Subject: sh: Centralize the CPU cache initialization routines. This provides a central point for CPU cache initialization routines. This replaces the antiquated p3_cache_init() method, which the vast majority of CPUs never cared about. Signed-off-by: Paul Mundt --- arch/sh/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index fe532aeaa16d..cf0e9c5146b1 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -230,7 +230,7 @@ void __init mem_init(void) datasize >> 10, initsize >> 10); - p3_cache_init(); + cpu_cache_init(); /* Initialize the vDSO */ vsyscall_init(); -- cgit v1.2.2 From 37443ef3f0406e855e169c87ae3f4ffb4b6ff635 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Sat, 15 Aug 2009 12:29:49 +0900 Subject: sh: Migrate SH-4 cacheflush ops to function pointers. This paves the way for allowing individual CPUs to overload the individual flushing routines that they care about without having to depend on weak aliases. SH-4 is converted over initially, as it wires up pretty much everything. The majority of the other CPUs will simply use the default no-op implementation with their own region flushers wired up. Signed-off-by: Paul Mundt --- arch/sh/mm/init.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index cf0e9c5146b1..0a9b4d855bc9 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -210,6 +210,9 @@ void __init mem_init(void) high_memory = node_high_memory; } + /* Set this up early, so we can take care of the zero page */ + cpu_cache_init(); + /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); __flush_wback_region(empty_zero_page, PAGE_SIZE); @@ -230,8 +233,6 @@ void __init mem_init(void) datasize >> 10, initsize >> 10); - cpu_cache_init(); - /* Initialize the vDSO */ vsyscall_init(); } -- cgit v1.2.2 From 0906a3ad33a254094fb74828e3ddb9af8771a6da Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Thu, 3 Sep 2009 17:21:10 +0900 Subject: sh: Fix up and optimize the kmap_coherent() interface. This fixes up the kmap_coherent/kunmap_coherent() interface for recent changes both in the page fault path and the shared cache flushers, as well as adding in some optimizations. One of the key things to note here is that the TLB flush itself is deferred until the unmap, and the call in to update_mmu_cache() itself goes away, relying on the regular page fault path to handle the lazy dcache writeback if necessary. Signed-off-by: Paul Mundt --- arch/sh/mm/init.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 0a9b4d855bc9..edc842ff61ed 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -106,27 +106,31 @@ void __init page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd; pud_t *pud; pmd_t *pmd; - int pgd_idx; + pte_t *pte; + int i, j, k; unsigned long vaddr; - vaddr = start & PMD_MASK; - end = (end + PMD_SIZE - 1) & PMD_MASK; - pgd_idx = pgd_index(vaddr); - pgd = pgd_base + pgd_idx; - - for ( ; (pgd_idx < PTRS_PER_PGD) && (vaddr != end); pgd++, pgd_idx++) { - BUG_ON(pgd_none(*pgd)); - pud = pud_offset(pgd, 0); - BUG_ON(pud_none(*pud)); - pmd = pmd_offset(pud, 0); - - if (!pmd_present(*pmd)) { - pte_t *pte_table; - pte_table = (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE); - pmd_populate_kernel(&init_mm, pmd, pte_table); + vaddr = start; + i = __pgd_offset(vaddr); + j = __pud_offset(vaddr); + k = __pmd_offset(vaddr); + pgd = pgd_base + i; + + for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) { + pud = (pud_t *)pgd; + for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) { + pmd = (pmd_t *)pud; + for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { + if (pmd_none(*pmd)) { + pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE); + pmd_populate_kernel(&init_mm, pmd, pte); + BUG_ON(pte != pte_offset_kernel(pmd, 0)); + } + vaddr += PMD_SIZE; + } + k = 0; } - - vaddr += PMD_SIZE; + j = 0; } } #endif /* CONFIG_MMU */ @@ -137,7 +141,7 @@ void __init page_table_range_init(unsigned long start, unsigned long end, void __init paging_init(void) { unsigned long max_zone_pfns[MAX_NR_ZONES]; - unsigned long vaddr; + unsigned long vaddr, end; int nid; /* We don't need to map the kernel through the TLB, as @@ -155,7 +159,8 @@ void __init paging_init(void) * pte's will be filled in by __set_fixmap(). */ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; - page_table_range_init(vaddr, 0, swapper_pg_dir); + end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; + page_table_range_init(vaddr, end, swapper_pg_dir); kmap_coherent_init(); -- cgit v1.2.2 From cc013a88906bad9d2832d6316de1c7dbc1c2a794 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Mon, 21 Sep 2009 17:02:36 -0700 Subject: arches: drop superfluous casts in nr_free_pages() callers Commit 96177299416dbccb73b54e6b344260154a445375 ("Drop free_pages()") modified nr_free_pages() to return 'unsigned long' instead of 'unsigned int'. This made the casts to 'unsigned long' in most callers superfluous, so remove them. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Geert Uytterhoeven Reviewed-by: Christoph Lameter Acked-by: Ingo Molnar Acked-by: Russell King Acked-by: David S. Miller Acked-by: Kyle McMartin Acked-by: WANG Cong Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Haavard Skinnemoen Cc: Mikael Starvik Cc: "Luck, Tony" Cc: Hirokazu Takata Cc: Ralf Baechle Cc: David Howells Acked-by: Benjamin Herrenschmidt Cc: Martin Schwidefsky Cc: Paul Mundt Cc: Chris Zankel Cc: Michal Simek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sh/mm/init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index edc842ff61ed..fabb7c6f48d2 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -232,7 +232,7 @@ void __init mem_init(void) printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " "%dk data, %dk init)\n", - (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), + nr_free_pages() << (PAGE_SHIFT-10), num_physpages << (PAGE_SHIFT-10), codesize >> 10, datasize >> 10, -- cgit v1.2.2 From c30bb2a25fcfde6157e6154a32c14686fb0bedbe Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Tue, 22 Sep 2009 16:45:43 -0700 Subject: kcore: add kclist types Presently, kclist_add() only eats start address and size as its arguments. Considering to make kclist dynamically reconfigulable, it's necessary to know which kclists are for System RAM and which are not. This patch add kclist types as KCORE_RAM KCORE_VMALLOC KCORE_TEXT KCORE_OTHER This "type" is used in a patch following this for detecting KCORE_RAM. Signed-off-by: KAMEZAWA Hiroyuki Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sh/mm/init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index fabb7c6f48d2..ef56c9f9d7ba 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -226,9 +226,9 @@ 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_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM); kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, - VMALLOC_END - VMALLOC_START); + VMALLOC_END - VMALLOC_START, KCORE_VMALLOC); printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " "%dk data, %dk init)\n", -- cgit v1.2.2 From a0614da88b67ffa3dbcc0d40b817e682c7c4a0ee Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Tue, 22 Sep 2009 16:45:44 -0700 Subject: kcore: register vmalloc area in generic way For /proc/kcore, vmalloc areas are registered per arch. But, all of them registers same range of [VMALLOC_START...VMALLOC_END) This patch unifies them. By this. archs which have no kclist_add() hooks can see vmalloc area correctly. Signed-off-by: KAMEZAWA Hiroyuki Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sh/mm/init.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index ef56c9f9d7ba..bf8bd026db55 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -186,7 +186,7 @@ void __init paging_init(void) set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); } -static struct kcore_list kcore_mem, kcore_vmalloc; +static struct kcore_list kcore_mem; void __init mem_init(void) { @@ -227,8 +227,6 @@ void __init mem_init(void) initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM); - kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, - VMALLOC_END - VMALLOC_START, KCORE_VMALLOC); printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " "%dk data, %dk init)\n", -- cgit v1.2.2 From 3089aa1b0c07fb7c48f9829c619f50198307789d Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Tue, 22 Sep 2009 16:45:48 -0700 Subject: kcore: use registerd physmem information For /proc/kcore, each arch registers its memory range by kclist_add(). In usual, - range of physical memory - range of vmalloc area - text, etc... are registered but "range of physical memory" has some troubles. It doesn't updated at memory hotplug and it tend to include unnecessary memory holes. Now, /proc/iomem (kernel/resource.c) includes required physical memory range information and it's properly updated at memory hotplug. Then, it's good to avoid using its own code(duplicating information) and to rebuild kclist for physical memory based on /proc/iomem. Signed-off-by: KAMEZAWA Hiroyuki Signed-off-by: Jiri Slaby Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: WANG Cong Cc: KOSAKI Motohiro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/sh/mm/init.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'arch/sh/mm/init.c') diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index bf8bd026db55..8173e38afd38 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -186,8 +186,6 @@ void __init paging_init(void) set_fixmap_nocache(FIX_UNCACHED, __pa(&__uncached_start)); } -static struct kcore_list kcore_mem; - void __init mem_init(void) { int codesize, datasize, initsize; @@ -226,8 +224,6 @@ 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, KCORE_RAM); - printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " "%dk data, %dk init)\n", nr_free_pages() << (PAGE_SHIFT-10), -- cgit v1.2.2