Commit 599ca0fb authored by Franck Bui-Huu's avatar Franck Bui-Huu Committed by Ralf Baechle
Browse files

[MIPS] Remove LIMITED_DMA support 



This code was needed only by Jaguar ATX.

Signed-off-by: default avatarFranck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent bef964e5

arch/mips/Kconfig

+0 −5
Original line number Diff line number Diff line
@@ -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

arch/mips/mm/highmem.c

+0 −2
Original line number Diff line number Diff line
@@ -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)

{

arch/mips/mm/init.c

+0 −3
Original line number Diff line number Diff line
@@ -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++;

include/asm-mips/highmem.h

+0 −42
Original line number Diff line number Diff line
@@ -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 */

include/asm-mips/page.h

+0 −4
Original line number Diff line number Diff line
@@ -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>