1 #ifndef _ASM_S390_DMA_H 2 #define _ASM_S390_DMA_H 3 4 #include <asm/io.h> 5 6 /* 7 * MAX_DMA_ADDRESS is ambiguous because on s390 its completely unrelated 8 * to DMA. It _is_ used for the s390 memory zone split at 2GB caused 9 * by the 31 bit heritage. 10 */ 11 #define MAX_DMA_ADDRESS 0x80000000 12 13 #ifdef CONFIG_PCI 14 extern int isa_dma_bridge_buggy; 15 #else 16 #define isa_dma_bridge_buggy (0) 17 #endif 18 19 #endif /* _ASM_S390_DMA_H */ 20