63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
|
#ifndef _ASM_POWERPC_PAGE_32_H
|
||
|
|
#define _ASM_POWERPC_PAGE_32_H
|
||
|
|
|
||
|
|
#include <asm/cache.h>
|
||
|
|
|
||
|
|
#if defined(CONFIG_PHYSICAL_ALIGN) && (CONFIG_PHYSICAL_START != 0)
|
||
|
|
#if (CONFIG_PHYSICAL_START % CONFIG_PHYSICAL_ALIGN) != 0
|
||
|
|
#error "CONFIG_PHYSICAL_START must be a multiple of CONFIG_PHYSICAL_ALIGN"
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define VM_DATA_DEFAULT_FLAGS VM_DATA_DEFAULT_FLAGS32
|
||
|
|
|
||
|
|
#ifdef CONFIG_NOT_COHERENT_CACHE
|
||
|
|
#define ARCH_DMA_MINALIGN L1_CACHE_BYTES
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef CONFIG_PTE_64BIT
|
||
|
|
#define PTE_FLAGS_OFFSET 4 /* offset of PTE flags, in bytes */
|
||
|
|
#else
|
||
|
|
#define PTE_FLAGS_OFFSET 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef CONFIG_PPC_256K_PAGES
|
||
|
|
#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2 - 2) /* 1/4 of a page */
|
||
|
|
#else
|
||
|
|
#define PTE_SHIFT (PAGE_SHIFT - PTE_T_LOG2) /* full page */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
/*
|
||
|
|
* The basic type of a PTE - 64 bits for those CPUs with > 32 bit
|
||
|
|
* physical addressing.
|
||
|
|
*/
|
||
|
|
#ifdef CONFIG_PTE_64BIT
|
||
|
|
typedef unsigned long long pte_basic_t;
|
||
|
|
#else
|
||
|
|
typedef unsigned long pte_basic_t;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Clear page using the dcbz instruction, which doesn't cause any
|
||
|
|
* memory traffic (except to write out any cache lines which get
|
||
|
|
* displaced). This only works on cacheable memory.
|
||
|
|
*/
|
||
|
|
static inline void clear_page(void *addr)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
for (i = 0; i < PAGE_SIZE / L1_CACHE_BYTES; i++, addr += L1_CACHE_BYTES)
|
||
|
|
dcbz(addr);
|
||
|
|
}
|
||
|
|
extern void copy_page(void *to, void *from);
|
||
|
|
|
||
|
|
#include <asm-generic/getorder.h>
|
||
|
|
|
||
|
|
#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
|
||
|
|
#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
|
||
|
|
|
||
|
|
#endif /* __ASSEMBLY__ */
|
||
|
|
|
||
|
|
#endif /* _ASM_POWERPC_PAGE_32_H */
|