[MIPS] Remove LIMITED_DMA support

This code was needed only by Jaguar ATX.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 515c5a6..fa2c443 100644 (file)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -883,11 +883,6 @@ config GENERIC_ISA_DMA
 config I8259
        bool
 
-config LIMITED_DMA
-       bool
-       select HIGHMEM
-       select SYS_SUPPORTS_HIGHMEM
-
 config MIPS_BONITO64
        bool
 

diff --git a/arch/mips/mm/highmem.c b/arch/mips/mm/highmem.c
index 675502a..10dd2af 100644 (file)
--- a/arch/mips/mm/highmem.c
+++ b/arch/mips/mm/highmem.c
@@ -80,7 +80,6 @@ void __kunmap_atomic(void *kvaddr, enum km_type type)
        pagefault_enable();
 }
 
-#ifndef CONFIG_LIMITED_DMA
 /*
  * This is the same as kmap_atomic() but can map memory that doesn't
  * have a struct page associated with it.
@@ -99,7 +98,6 @@ void *kmap_atomic_pfn(unsigned long pfn, enum km_type type)
 
        return (void*) vaddr;
 }
-#endif /* CONFIG_LIMITED_DMA */
 
 struct page *__kmap_atomic_to_page(void *ptr)
 {

diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 2d1c2c0..4c80528 100644 (file)
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -424,9 +424,6 @@ void __init mem_init(void)
                        continue;
                }
                ClearPageReserved(page);
-#ifdef CONFIG_LIMITED_DMA
-               set_page_address(page, lowmem_page_address(page));
-#endif
                init_page_count(page);
                __free_page(page);
                totalhigh_pages++;

diff --git a/include/asm-mips/highmem.h b/include/asm-mips/highmem.h
index f8c8182..4d6bd5c 100644 (file)
--- a/include/asm-mips/highmem.h
+++ b/include/asm-mips/highmem.h
@@ -48,46 +48,6 @@ extern pte_t *pkmap_page_table;
 extern void * kmap_high(struct page *page);
 extern void kunmap_high(struct page *page);
 
-/*
- * CONFIG_LIMITED_DMA is for systems with DMA limitations such as Momentum's
- * Jaguar ATX.  This option exploits the highmem code in the kernel so is
- * always enabled together with CONFIG_HIGHMEM but at this time doesn't
- * actually add highmem functionality.
- */
-
-#ifdef CONFIG_LIMITED_DMA
-
-/*
- * These are the default functions for the no-highmem case from
- * <linux/highmem.h>
- */
-static inline void *kmap(struct page *page)
-{
-       might_sleep();
-       return page_address(page);
-}
-
-#define kunmap(page) do { (void) (page); } while (0)
-
-static inline void *kmap_atomic(struct page *page, enum km_type type)
-{
-       pagefault_disable();
-       return page_address(page);
-}
-
-static inline void kunmap_atomic(void *kvaddr, enum km_type type)
-{
-       pagefault_enable();
-}
-
-#define kmap_atomic_pfn(pfn, idx) kmap_atomic(pfn_to_page(pfn), (idx))
-
-#define kmap_atomic_to_page(ptr) virt_to_page(ptr)
-
-#define flush_cache_kmaps()    do { } while (0)
-
-#else /* LIMITED_DMA */
-
 extern void *__kmap(struct page *page);
 extern void __kunmap(struct page *page);
 extern void *__kmap_atomic(struct page *page, enum km_type type);
@@ -103,8 +63,6 @@ extern struct page *__kmap_atomic_to_page(void *ptr);
 
 #define flush_cache_kmaps()    flush_cache_all()
 
-#endif /* LIMITED_DMA */
-
 #endif /* __KERNEL__ */
 
 #endif /* _ASM_HIGHMEM_H */

diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index d3fbd83..5c3239d 100644 (file)
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -190,10 +190,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
 #define UNCAC_ADDR(addr)       ((addr) - PAGE_OFFSET + UNCAC_BASE)
 #define CAC_ADDR(addr)         ((addr) - UNCAC_BASE + PAGE_OFFSET)
 
-#ifdef CONFIG_LIMITED_DMA
-#define WANT_PAGE_VIRTUAL
-#endif
-
 #include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>