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[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>
This commit is contained in:
Franck Bui-Huu 2007-05-07 18:01:53 +02:00 committed by Ralf Baechle
parent bef964e55a
commit 599ca0fb63
5 changed files with 0 additions and 56 deletions
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5
arch/mips/Kconfig
View File

@ -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

2
arch/mips/mm/highmem.c
View File

@ -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)
{

3
arch/mips/mm/init.c
View File

@ -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++;

42
include/asm-mips/highmem.h
View File

@ -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 */

4
include/asm-mips/page.h
View File

@ -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>