diff options
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/Kconfig | 2 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/dma-mapping.h | 32 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/io.h | 1 | ||||
| -rw-r--r-- | arch/xtensa/include/asm/mm-arch-hooks.h | 15 | ||||
| -rw-r--r-- | arch/xtensa/mm/fault.c | 4 | ||||
| -rw-r--r-- | arch/xtensa/mm/highmem.c | 2 |
6 files changed, 46 insertions, 10 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 87be10e8b57a..e5b872ba2484 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -151,7 +151,7 @@ config HAVE_SMP the CPU core definition and currently needs to be selected manually. Multiprocessor support in implemented with external cache and - interrupt controlers. + interrupt controllers. The MX interrupt distributer adds Interprocessor Interrupts and causes the IRQ numbers to be increased by 4 for devices diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h index 172a02a6ad14..1f5f6dc09736 100644 --- a/arch/xtensa/include/asm/dma-mapping.h +++ b/arch/xtensa/include/asm/dma-mapping.h @@ -52,14 +52,15 @@ dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, } static inline int -dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, +dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction) { int i; + struct scatterlist *sg; BUG_ON(direction == DMA_NONE); - for (i = 0; i < nents; i++, sg++ ) { + for_each_sg(sglist, sg, nents, i) { BUG_ON(!sg_page(sg)); sg->dma_address = sg_phys(sg); @@ -124,20 +125,24 @@ dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, consistent_sync((void *)bus_to_virt(dma_handle)+offset,size,direction); } static inline void -dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, +dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems, enum dma_data_direction dir) { int i; - for (i = 0; i < nelems; i++, sg++) + struct scatterlist *sg; + + for_each_sg(sglist, sg, nelems, i) consistent_sync(sg_virt(sg), sg->length, dir); } static inline void -dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, - enum dma_data_direction dir) +dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, + int nelems, enum dma_data_direction dir) { int i; - for (i = 0; i < nelems; i++, sg++) + struct scatterlist *sg; + + for_each_sg(sglist, sg, nelems, i) consistent_sync(sg_virt(sg), sg->length, dir); } static inline int @@ -185,4 +190,17 @@ static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt, return -EINVAL; } +static inline void *dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t flag, + struct dma_attrs *attrs) +{ + return NULL; +} + +static inline void dma_free_attrs(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle, + struct dma_attrs *attrs) +{ +} + #endif /* _XTENSA_DMA_MAPPING_H */ diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h index fe1600a09438..c39bb6e61911 100644 --- a/arch/xtensa/include/asm/io.h +++ b/arch/xtensa/include/asm/io.h @@ -59,6 +59,7 @@ static inline void __iomem *ioremap_cache(unsigned long offset, } #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache static inline void __iomem *ioremap(unsigned long offset, unsigned long size) { diff --git a/arch/xtensa/include/asm/mm-arch-hooks.h b/arch/xtensa/include/asm/mm-arch-hooks.h new file mode 100644 index 000000000000..d2e5cfd3dd02 --- /dev/null +++ b/arch/xtensa/include/asm/mm-arch-hooks.h @@ -0,0 +1,15 @@ +/* + * Architecture specific mm hooks + * + * Copyright (C) 2015, IBM Corporation + * Author: Laurent Dufour <ldufour@linux.vnet.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _ASM_XTENSA_MM_ARCH_HOOKS_H +#define _ASM_XTENSA_MM_ARCH_HOOKS_H + +#endif /* _ASM_XTENSA_MM_ARCH_HOOKS_H */ diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c index 9e3571a6535c..83a44a33cfa1 100644 --- a/arch/xtensa/mm/fault.c +++ b/arch/xtensa/mm/fault.c @@ -15,10 +15,10 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/hardirq.h> +#include <linux/uaccess.h> #include <asm/mmu_context.h> #include <asm/cacheflush.h> #include <asm/hardirq.h> -#include <asm/uaccess.h> #include <asm/pgalloc.h> DEFINE_PER_CPU(unsigned long, asid_cache) = ASID_USER_FIRST; @@ -57,7 +57,7 @@ void do_page_fault(struct pt_regs *regs) /* If we're in an interrupt or have no user * context, we must not take the fault.. */ - if (in_atomic() || !mm) { + if (faulthandler_disabled() || !mm) { bad_page_fault(regs, address, SIGSEGV); return; } diff --git a/arch/xtensa/mm/highmem.c b/arch/xtensa/mm/highmem.c index 8cfb71ec0937..184ceadccc1a 100644 --- a/arch/xtensa/mm/highmem.c +++ b/arch/xtensa/mm/highmem.c @@ -42,6 +42,7 @@ void *kmap_atomic(struct page *page) enum fixed_addresses idx; unsigned long vaddr; + preempt_disable(); pagefault_disable(); if (!PageHighMem(page)) return page_address(page); @@ -79,6 +80,7 @@ void __kunmap_atomic(void *kvaddr) } pagefault_enable(); + preempt_enable(); } EXPORT_SYMBOL(__kunmap_atomic); |
