linux-mm / page-reclaim / cd52d1ee9a92587b242d946a2300a3245d3b885a / . / include / asm-powerpc / tce.h

/* | |

* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation | |

* Rewrite, cleanup: | |

* Copyright (C) 2004 Olof Johansson <olof@austin.ibm.com>, IBM Corporation | |

* | |

* This program is free software; you can redistribute it and/or modify | |

* it under the terms of the GNU General Public License as published by | |

* the Free Software Foundation; either version 2 of the License, or | |

* (at your option) any later version. | |

* | |

* This program is distributed in the hope that it will be useful, | |

* but WITHOUT ANY WARRANTY; without even the implied warranty of | |

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |

* GNU General Public License for more details. | |

* | |

* You should have received a copy of the GNU General Public License | |

* along with this program; if not, write to the Free Software | |

* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |

*/ | |

#ifndef _ASM_POWERPC_TCE_H | |

#define _ASM_POWERPC_TCE_H | |

/* | |

* Tces come in two formats, one for the virtual bus and a different | |

* format for PCI | |

*/ | |

#define TCE_VB 0 | |

#define TCE_PCI 1 | |

/* TCE page size is 4096 bytes (1 << 12) */ | |

#define TCE_SHIFT 12 | |

#define TCE_PAGE_SIZE (1 << TCE_SHIFT) | |

#define TCE_PAGE_FACTOR (PAGE_SHIFT - TCE_SHIFT) | |

/* tce_entry | |

* Used by pSeries (SMP) and iSeries/pSeries LPAR, but there it's | |

* abstracted so layout is irrelevant. | |

*/ | |

union tce_entry { | |

unsigned long te_word; | |

struct { | |

unsigned int tb_cacheBits :6; /* Cache hash bits - not used */ | |

unsigned int tb_rsvd :6; | |

unsigned long tb_rpn :40; /* Real page number */ | |

unsigned int tb_valid :1; /* Tce is valid (vb only) */ | |

unsigned int tb_allio :1; /* Tce is valid for all lps (vb only) */ | |

unsigned int tb_lpindex :8; /* LpIndex for user of TCE (vb only) */ | |

unsigned int tb_pciwr :1; /* Write allowed (pci only) */ | |

unsigned int tb_rdwr :1; /* Read allowed (pci), Write allowed (vb) */ | |

} te_bits; | |

#define te_cacheBits te_bits.tb_cacheBits | |

#define te_rpn te_bits.tb_rpn | |

#define te_valid te_bits.tb_valid | |

#define te_allio te_bits.tb_allio | |

#define te_lpindex te_bits.tb_lpindex | |

#define te_pciwr te_bits.tb_pciwr | |

#define te_rdwr te_bits.tb_rdwr | |

}; | |

#endif /* _ASM_POWERPC_TCE_H */ |