1 /* 2 * linux/arch/unicore32/include/mach/memory.h 3 * 4 * Code specific to PKUnity SoC and UniCore ISA 5 * 6 * Copyright (C) 2001-2010 GUAN Xue-tao 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 #ifndef __MACH_PUV3_MEMORY_H__ 13 #define __MACH_PUV3_MEMORY_H__ 14 15 #include <mach/hardware.h> 16 17 /* Physical DRAM offset. */ 18 #define PHYS_OFFSET UL(0x00000000) 19 /* The base address of exception vectors. */ 20 #define VECTORS_BASE UL(0xffff0000) 21 /* The base address of kuser area. */ 22 #define KUSER_BASE UL(0x80000000) 23 24 #ifdef __ASSEMBLY__ 25 /* The byte offset of the kernel image in RAM from the start of RAM. */ 26 #define KERNEL_IMAGE_START 0x00408000 27 #endif 28 29 #if !defined(__ASSEMBLY__) && defined(CONFIG_PCI) 30 31 void puv3_pci_adjust_zones(unsigned long *size, unsigned long *holes); 32 33 #define arch_adjust_zones(size, holes) \ 34 puv3_pci_adjust_zones(size, holes) 35 36 #endif 37 38 /* 39 * PCI controller in PKUnity-3 masks highest 5-bit for upstream channel, 40 * so we must limit the DMA allocation within 128M physical memory for 41 * supporting PCI devices. 42 */ 43 #define PCI_DMA_THRESHOLD (PHYS_OFFSET + SZ_128M - 1) 44 45 #define is_pcibus_device(dev) (dev && \ 46 (strncmp(dev->bus->name, "pci", 3) == 0)) 47 48 #define __virt_to_pcibus(x) (__virt_to_phys((x) + PKUNITY_PCIAHB_BASE)) 49 #define __pcibus_to_virt(x) (__phys_to_virt(x) - PKUNITY_PCIAHB_BASE) 50 51 /* kuser area */ 52 #define KUSER_VECPAGE_BASE (KUSER_BASE + UL(0x3fff0000)) 53 /* kuser_vecpage (0xbfff0000) is ro, and vectors page (0xffff0000) is rw */ 54 #define kuser_vecpage_to_vectors(x) ((x) - (KUSER_VECPAGE_BASE) \ 55 + (VECTORS_BASE)) 56 57 #endif 58