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
31void 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