1 /* 2 ** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved. 3 ** Distributed under the terms of the MIT License. 4 */ 5 6 7 #include <arch_mmu.h> 8 #include <arch_cpu.h> 9 10 11 uint32 12 page_table_entry::PrimaryHash(uint32 virtualSegmentID, uint32 virtualAddress) 13 { 14 return (virtualSegmentID & 0x7ffff) ^ ((virtualAddress >> 12) & 0xffff); 15 } 16 17 18 uint32 19 page_table_entry::SecondaryHash(uint32 virtualSegmentID, uint32 virtualAddress) 20 { 21 return ~PrimaryHash(virtualSegmentID, virtualAddress); 22 } 23 24 25 uint32 26 page_table_entry::SecondaryHash(uint32 primaryHash) 27 { 28 return ~primaryHash; 29 } 30 31 32 void 33 ppc_get_page_table(page_table_entry_group **_pageTable, size_t *_size) 34 { 35 uint32 sdr1 = get_sdr1(); 36 37 *_pageTable = (page_table_entry_group *)(sdr1 & 0xffff0000); 38 *_size = ((sdr1 & 0x1ff) + 1) << 16; 39 } 40 41 42 void 43 ppc_set_page_table(page_table_entry_group *pageTable, size_t size) 44 { 45 set_sdr1(((uint32)pageTable & 0xffff0000) | (((size -1) >> 16) & 0x1ff)); 46 } 47 48