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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-03 16:37:01 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-03 16:37:01 -0800 |
commit | 989d873fc5b6a96695b97738dea8d9f02a60f8ab (patch) | |
tree | 4d6a866920d93fbe4316d9c7ee22e86161cd3c2f /arch | |
parent | d9a1abe4844e7591cd82e167a1a09e6546f6c45e (diff) | |
parent | 04228460a3ded723b2da09141c76c45ddd712caf (diff) | |
download | linux-stable-989d873fc5b6a96695b97738dea8d9f02a60f8ab.tar.gz linux-stable-989d873fc5b6a96695b97738dea8d9f02a60f8ab.tar.bz2 linux-stable-989d873fc5b6a96695b97738dea8d9f02a60f8ab.zip |
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: pxa: fix page table corruption on resume
ARM: it8152: add IT8152_LAST_IRQ definition to fix build error
ARM: pxa: PXA_ESERIES depends on FB_W100.
ARM: 6605/1: Add missing include "asm/memory.h"
ARM: 6540/1: Stop irqsoff trace on return to user
ARM: 6537/1: update Nomadik, U300 and Ux500 maintainers
ARM: 6536/1: Add missing SZ_{32,64,128}
ARM: fix cache-feroceon-l2 after stack based kmap_atomic()
ARM: fix cache-xsc3l2 after stack based kmap_atomic()
ARM: get rid of kmap_high_l1_vipt()
ARM: smp: avoid incrementing mm_users on CPU startup
ARM: pxa: PXA_ESERIES depends on FB_W100.
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/include/asm/hardware/it8152.h | 1 | ||||
-rw-r--r-- | arch/arm/include/asm/highmem.h | 3 | ||||
-rw-r--r-- | arch/arm/include/asm/sizes.h | 6 | ||||
-rw-r--r-- | arch/arm/include/asm/system.h | 1 | ||||
-rw-r--r-- | arch/arm/kernel/entry-common.S | 6 | ||||
-rw-r--r-- | arch/arm/kernel/smp.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-pxa/Kconfig | 1 | ||||
-rw-r--r-- | arch/arm/mach-pxa/sleep.S | 4 | ||||
-rw-r--r-- | arch/arm/mm/cache-feroceon-l2.c | 37 | ||||
-rw-r--r-- | arch/arm/mm/cache-xsc3l2.c | 57 | ||||
-rw-r--r-- | arch/arm/mm/dma-mapping.c | 7 | ||||
-rw-r--r-- | arch/arm/mm/flush.c | 7 | ||||
-rw-r--r-- | arch/arm/mm/highmem.c | 87 |
13 files changed, 62 insertions, 156 deletions
diff --git a/arch/arm/include/asm/hardware/it8152.h b/arch/arm/include/asm/hardware/it8152.h index 21fa272301f8..b2f95c72287c 100644 --- a/arch/arm/include/asm/hardware/it8152.h +++ b/arch/arm/include/asm/hardware/it8152.h @@ -76,6 +76,7 @@ extern unsigned long it8152_base_address; IT8152_PD_IRQ(0) Audio controller (ACR) */ #define IT8152_IRQ(x) (IRQ_BOARD_START + (x)) +#define IT8152_LAST_IRQ (IRQ_BOARD_START + 40) /* IRQ-sources in 3 groups - local devices, LPC (serial), and external PCI */ #define IT8152_LD_IRQ_COUNT 9 diff --git a/arch/arm/include/asm/highmem.h b/arch/arm/include/asm/highmem.h index 1fc684e70ab6..7080e2c8fa62 100644 --- a/arch/arm/include/asm/highmem.h +++ b/arch/arm/include/asm/highmem.h @@ -25,9 +25,6 @@ extern void *kmap_high(struct page *page); extern void *kmap_high_get(struct page *page); extern void kunmap_high(struct page *page); -extern void *kmap_high_l1_vipt(struct page *page, pte_t *saved_pte); -extern void kunmap_high_l1_vipt(struct page *page, pte_t saved_pte); - /* * The following functions are already defined by <linux/highmem.h> * when CONFIG_HIGHMEM is not set. diff --git a/arch/arm/include/asm/sizes.h b/arch/arm/include/asm/sizes.h index 4fc1565e4f93..316bb2b2be3d 100644 --- a/arch/arm/include/asm/sizes.h +++ b/arch/arm/include/asm/sizes.h @@ -13,9 +13,6 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ -/* DO NOT EDIT!! - this file automatically generated - * from .s file by awk -f s2h.awk - */ /* Size definitions * Copyright (C) ARM Limited 1998. All rights reserved. */ @@ -25,6 +22,9 @@ /* handy sizes */ #define SZ_16 0x00000010 +#define SZ_32 0x00000020 +#define SZ_64 0x00000040 +#define SZ_128 0x00000080 #define SZ_256 0x00000100 #define SZ_512 0x00000200 diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 1120f18a6b17..80025948b8ad 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -150,6 +150,7 @@ extern unsigned int user_debug; #define rmb() dmb() #define wmb() mb() #else +#include <asm/memory.h> #define mb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0) #define rmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0) #define wmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0) diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index 8bfa98757cd2..80bf8cd88d7c 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -29,6 +29,9 @@ ret_fast_syscall: ldr r1, [tsk, #TI_FLAGS] tst r1, #_TIF_WORK_MASK bne fast_work_pending +#if defined(CONFIG_IRQSOFF_TRACER) + asm_trace_hardirqs_on +#endif /* perform architecture specific actions before user return */ arch_ret_to_user r1, lr @@ -65,6 +68,9 @@ ret_slow_syscall: tst r1, #_TIF_WORK_MASK bne work_pending no_work_pending: +#if defined(CONFIG_IRQSOFF_TRACER) + asm_trace_hardirqs_on +#endif /* perform architecture specific actions before user return */ arch_ret_to_user r1, lr diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 8c1959590252..9066473c0ebc 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -310,7 +310,6 @@ asmlinkage void __cpuinit secondary_start_kernel(void) * All kernel threads share the same mm context; grab a * reference and switch to it. */ - atomic_inc(&mm->mm_users); atomic_inc(&mm->mm_count); current->active_mm = mm; cpumask_set_cpu(cpu, mm_cpumask(mm)); diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig index dd235ecc9d6c..c93e73d54dd1 100644 --- a/arch/arm/mach-pxa/Kconfig +++ b/arch/arm/mach-pxa/Kconfig @@ -540,6 +540,7 @@ config MACH_ICONTROL config ARCH_PXA_ESERIES bool "PXA based Toshiba e-series PDAs" select PXA25x + select FB_W100 config MACH_E330 bool "Toshiba e330" diff --git a/arch/arm/mach-pxa/sleep.S b/arch/arm/mach-pxa/sleep.S index 52c30b01a671..ae008110db4e 100644 --- a/arch/arm/mach-pxa/sleep.S +++ b/arch/arm/mach-pxa/sleep.S @@ -353,8 +353,8 @@ resume_turn_on_mmu: @ Let us ensure we jump to resume_after_mmu only when the mcr above @ actually took effect. They call it the "cpwait" operation. - mrc p15, 0, r1, c2, c0, 0 @ queue a dependency on CP15 - sub pc, r2, r1, lsr #32 @ jump to virtual addr + mrc p15, 0, r0, c2, c0, 0 @ queue a dependency on CP15 + sub pc, r2, r0, lsr #32 @ jump to virtual addr nop nop nop diff --git a/arch/arm/mm/cache-feroceon-l2.c b/arch/arm/mm/cache-feroceon-l2.c index 6e77c042d8e9..e0b0e7a4ec68 100644 --- a/arch/arm/mm/cache-feroceon-l2.c +++ b/arch/arm/mm/cache-feroceon-l2.c @@ -13,13 +13,9 @@ */ #include <linux/init.h> +#include <linux/highmem.h> #include <asm/cacheflush.h> -#include <asm/kmap_types.h> -#include <asm/fixmap.h> -#include <asm/pgtable.h> -#include <asm/tlbflush.h> #include <plat/cache-feroceon-l2.h> -#include "mm.h" /* * Low-level cache maintenance operations. @@ -39,27 +35,30 @@ * between which we don't want to be preempted. */ -static inline unsigned long l2_start_va(unsigned long paddr) +static inline unsigned long l2_get_va(unsigned long paddr) { #ifdef CONFIG_HIGHMEM /* - * Let's do our own fixmap stuff in a minimal way here. * Because range ops can't be done on physical addresses, * we simply install a virtual mapping for it only for the * TLB lookup to occur, hence no need to flush the untouched - * memory mapping. This is protected with the disabling of - * interrupts by the caller. + * memory mapping afterwards (note: a cache flush may happen + * in some circumstances depending on the path taken in kunmap_atomic). */ - unsigned long idx = KM_L2_CACHE + KM_TYPE_NR * smp_processor_id(); - unsigned long vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - set_pte_ext(TOP_PTE(vaddr), pfn_pte(paddr >> PAGE_SHIFT, PAGE_KERNEL), 0); - local_flush_tlb_kernel_page(vaddr); - return vaddr + (paddr & ~PAGE_MASK); + void *vaddr = kmap_atomic_pfn(paddr >> PAGE_SHIFT); + return (unsigned long)vaddr + (paddr & ~PAGE_MASK); #else return __phys_to_virt(paddr); #endif } +static inline void l2_put_va(unsigned long vaddr) +{ +#ifdef CONFIG_HIGHMEM + kunmap_atomic((void *)vaddr); +#endif +} + static inline void l2_clean_pa(unsigned long addr) { __asm__("mcr p15, 1, %0, c15, c9, 3" : : "r" (addr)); @@ -76,13 +75,14 @@ static inline void l2_clean_pa_range(unsigned long start, unsigned long end) */ BUG_ON((start ^ end) >> PAGE_SHIFT); - raw_local_irq_save(flags); - va_start = l2_start_va(start); + va_start = l2_get_va(start); va_end = va_start + (end - start); + raw_local_irq_save(flags); __asm__("mcr p15, 1, %0, c15, c9, 4\n\t" "mcr p15, 1, %1, c15, c9, 5" : : "r" (va_start), "r" (va_end)); raw_local_irq_restore(flags); + l2_put_va(va_start); } static inline void l2_clean_inv_pa(unsigned long addr) @@ -106,13 +106,14 @@ static inline void l2_inv_pa_range(unsigned long start, unsigned long end) */ BUG_ON((start ^ end) >> PAGE_SHIFT); - raw_local_irq_save(flags); - va_start = l2_start_va(start); + va_start = l2_get_va(start); va_end = va_start + (end - start); + raw_local_irq_save(flags); __asm__("mcr p15, 1, %0, c15, c11, 4\n\t" "mcr p15, 1, %1, c15, c11, 5" : : "r" (va_start), "r" (va_end)); raw_local_irq_restore(flags); + l2_put_va(va_start); } static inline void l2_inv_all(void) diff --git a/arch/arm/mm/cache-xsc3l2.c b/arch/arm/mm/cache-xsc3l2.c index c3154928bccd..5a32020471e3 100644 --- a/arch/arm/mm/cache-xsc3l2.c +++ b/arch/arm/mm/cache-xsc3l2.c @@ -17,14 +17,10 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> +#include <linux/highmem.h> #include <asm/system.h> #include <asm/cputype.h> #include <asm/cacheflush.h> -#include <asm/kmap_types.h> -#include <asm/fixmap.h> -#include <asm/pgtable.h> -#include <asm/tlbflush.h> -#include "mm.h" #define CR_L2 (1 << 26) @@ -71,16 +67,15 @@ static inline void xsc3_l2_inv_all(void) dsb(); } +static inline void l2_unmap_va(unsigned long va) +{ #ifdef CONFIG_HIGHMEM -#define l2_map_save_flags(x) raw_local_save_flags(x) -#define l2_map_restore_flags(x) raw_local_irq_restore(x) -#else -#define l2_map_save_flags(x) ((x) = 0) -#define l2_map_restore_flags(x) ((void)(x)) + if (va != -1) + kunmap_atomic((void *)va); #endif +} -static inline unsigned long l2_map_va(unsigned long pa, unsigned long prev_va, - unsigned long flags) +static inline unsigned long l2_map_va(unsigned long pa, unsigned long prev_va) { #ifdef CONFIG_HIGHMEM unsigned long va = prev_va & PAGE_MASK; @@ -89,17 +84,10 @@ static inline unsigned long l2_map_va(unsigned long pa, unsigned long prev_va, /* * Switching to a new page. Because cache ops are * using virtual addresses only, we must put a mapping - * in place for it. We also enable interrupts for a - * short while and disable them again to protect this - * mapping. + * in place for it. */ - unsigned long idx; - raw_local_irq_restore(flags); - idx = KM_L2_CACHE + KM_TYPE_NR * smp_processor_id(); - va = __fix_to_virt(FIX_KMAP_BEGIN + idx); - raw_local_irq_restore(flags | PSR_I_BIT); - set_pte_ext(TOP_PTE(va), pfn_pte(pa >> PAGE_SHIFT, PAGE_KERNEL), 0); - local_flush_tlb_kernel_page(va); + l2_unmap_va(prev_va); + va = (unsigned long)kmap_atomic_pfn(pa >> PAGE_SHIFT); } return va + (pa_offset >> (32 - PAGE_SHIFT)); #else @@ -109,7 +97,7 @@ static inline unsigned long l2_map_va(unsigned long pa, unsigned long prev_va, static void xsc3_l2_inv_range(unsigned long start, unsigned long end) { - unsigned long vaddr, flags; + unsigned long vaddr; if (start == 0 && end == -1ul) { xsc3_l2_inv_all(); @@ -117,13 +105,12 @@ static void xsc3_l2_inv_range(unsigned long start, unsigned long end) } vaddr = -1; /* to force the first mapping */ - l2_map_save_flags(flags); /* * Clean and invalidate partial first cache line. */ if (start & (CACHE_LINE_SIZE - 1)) { - vaddr = l2_map_va(start & ~(CACHE_LINE_SIZE - 1), vaddr, flags); + vaddr = l2_map_va(start & ~(CACHE_LINE_SIZE - 1), vaddr); xsc3_l2_clean_mva(vaddr); xsc3_l2_inv_mva(vaddr); start = (start | (CACHE_LINE_SIZE - 1)) + 1; @@ -133,7 +120,7 @@ static void xsc3_l2_inv_range(unsigned long start, unsigned long end) * Invalidate all full cache lines between 'start' and 'end'. */ while (start < (end & ~(CACHE_LINE_SIZE - 1))) { - vaddr = l2_map_va(start, vaddr, flags); + vaddr = l2_map_va(start, vaddr); xsc3_l2_inv_mva(vaddr); start += CACHE_LINE_SIZE; } @@ -142,31 +129,30 @@ static void xsc3_l2_inv_range(unsigned long start, unsigned long end) * Clean and invalidate partial last cache line. */ if (start < end) { - vaddr = l2_map_va(start, vaddr, flags); + vaddr = l2_map_va(start, vaddr); xsc3_l2_clean_mva(vaddr); xsc3_l2_inv_mva(vaddr); } - l2_map_restore_flags(flags); + l2_unmap_va(vaddr); dsb(); } static void xsc3_l2_clean_range(unsigned long start, unsigned long end) { - unsigned long vaddr, flags; + unsigned long vaddr; vaddr = -1; /* to force the first mapping */ - l2_map_save_flags(flags); start &= ~(CACHE_LINE_SIZE - 1); while (start < end) { - vaddr = l2_map_va(start, vaddr, flags); + vaddr = l2_map_va(start, vaddr); xsc3_l2_clean_mva(vaddr); start += CACHE_LINE_SIZE; } - l2_map_restore_flags(flags); + l2_unmap_va(vaddr); dsb(); } @@ -193,7 +179,7 @@ static inline void xsc3_l2_flush_all(void) static void xsc3_l2_flush_range(unsigned long start, unsigned long end) { - unsigned long vaddr, flags; + unsigned long vaddr; if (start == 0 && end == -1ul) { xsc3_l2_flush_all(); @@ -201,17 +187,16 @@ static void xsc3_l2_flush_range(unsigned long start, unsigned long end) } vaddr = -1; /* to force the first mapping */ - l2_map_save_flags(flags); start &= ~(CACHE_LINE_SIZE - 1); while (start < end) { - vaddr = l2_map_va(start, vaddr, flags); + vaddr = l2_map_va(start, vaddr); xsc3_l2_clean_mva(vaddr); xsc3_l2_inv_mva(vaddr); start += CACHE_LINE_SIZE; } - l2_map_restore_flags(flags); + l2_unmap_va(vaddr); dsb(); } diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index ac6a36142fcd..809f1bf9fa29 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/device.h> #include <linux/dma-mapping.h> +#include <linux/highmem.h> #include <asm/memory.h> #include <asm/highmem.h> @@ -480,10 +481,10 @@ static void dma_cache_maint_page(struct page *page, unsigned long offset, op(vaddr, len, dir); kunmap_high(page); } else if (cache_is_vipt()) { - pte_t saved_pte; - vaddr = kmap_high_l1_vipt(page, &saved_pte); + /* unmapped pages might still be cached */ + vaddr = kmap_atomic(page); op(vaddr + offset, len, dir); - kunmap_high_l1_vipt(page, saved_pte); + kunmap_atomic(vaddr); } } else { vaddr = page_address(page) + offset; diff --git a/arch/arm/mm/flush.c b/arch/arm/mm/flush.c index 391ffae75098..c29f2839f1d2 100644 --- a/arch/arm/mm/flush.c +++ b/arch/arm/mm/flush.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/mm.h> #include <linux/pagemap.h> +#include <linux/highmem.h> #include <asm/cacheflush.h> #include <asm/cachetype.h> @@ -180,10 +181,10 @@ void __flush_dcache_page(struct address_space *mapping, struct page *page) __cpuc_flush_dcache_area(addr, PAGE_SIZE); kunmap_high(page); } else if (cache_is_vipt()) { - pte_t saved_pte; - addr = kmap_high_l1_vipt(page, &saved_pte); + /* unmapped pages might still be cached */ + addr = kmap_atomic(page); __cpuc_flush_dcache_area(addr, PAGE_SIZE); - kunmap_high_l1_vipt(page, saved_pte); + kunmap_atomic(addr); } } diff --git a/arch/arm/mm/highmem.c b/arch/arm/mm/highmem.c index c435fd9e1da9..807c0573abbe 100644 --- a/arch/arm/mm/highmem.c +++ b/arch/arm/mm/highmem.c @@ -140,90 +140,3 @@ struct page *kmap_atomic_to_page(const void *ptr) pte = TOP_PTE(vaddr); return pte_page(*pte); } - -#ifdef CONFIG_CPU_CACHE_VIPT - -#include <linux/percpu.h> - -/* - * The VIVT cache of a highmem page is always flushed before the page - * is unmapped. Hence unmapped highmem pages need no cache maintenance - * in that case. - * - * However unmapped pages may still be cached with a VIPT cache, and - * it is not possible to perform cache maintenance on them using physical - * addresses unfortunately. So we have no choice but to set up a temporary - * virtual mapping for that purpose. - * - * Yet this VIPT cache maintenance may be triggered from DMA support - * functions which are possibly called from interrupt context. As we don't - * want to keep interrupt disabled all the time when such maintenance is - * taking place, we therefore allow for some reentrancy by preserving and - * restoring the previous fixmap entry before the interrupted context is - * resumed. If the reentrancy depth is 0 then there is no need to restore - * the previous fixmap, and leaving the current one in place allow it to - * be reused the next time without a TLB flush (common with DMA). - */ - -static DEFINE_PER_CPU(int, kmap_high_l1_vipt_depth); - -void *kmap_high_l1_vipt(struct page *page, pte_t *saved_pte) -{ - unsigned int idx, cpu; - int *depth; - unsigned long vaddr, flags; - pte_t pte, *ptep; - - if (!in_interrupt()) - preempt_disable(); - - cpu = smp_processor_id(); - depth = &per_cpu(kmap_high_l1_vipt_depth, cpu); - - idx = KM_L1_CACHE + KM_TYPE_NR * cpu; - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - ptep = TOP_PTE(vaddr); - pte = mk_pte(page, kmap_prot); - - raw_local_irq_save(flags); - (*depth)++; - if (pte_val(*ptep) == pte_val(pte)) { - *saved_pte = pte; - } else { - *saved_pte = *ptep; - set_pte_ext(ptep, pte, 0); - local_flush_tlb_kernel_page(vaddr); - } - raw_local_irq_restore(flags); - - return (void *)vaddr; -} - -void kunmap_high_l1_vipt(struct page *page, pte_t saved_pte) -{ - unsigned int idx, cpu = smp_processor_id(); - int *depth = &per_cpu(kmap_high_l1_vipt_depth, cpu); - unsigned long vaddr, flags; - pte_t pte, *ptep; - - idx = KM_L1_CACHE + KM_TYPE_NR * cpu; - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - ptep = TOP_PTE(vaddr); - pte = mk_pte(page, kmap_prot); - - BUG_ON(pte_val(*ptep) != pte_val(pte)); - BUG_ON(*depth <= 0); - - raw_local_irq_save(flags); - (*depth)--; - if (*depth != 0 && pte_val(pte) != pte_val(saved_pte)) { - set_pte_ext(ptep, saved_pte, 0); - local_flush_tlb_kernel_page(vaddr); - } - raw_local_irq_restore(flags); - - if (!in_interrupt()) - preempt_enable(); -} - -#endif /* CONFIG_CPU_CACHE_VIPT */ |