arch/unicore32/include/mach/memory.h

   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