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filename src/sh4/mmu.c
changeset 810:833cc4960556
prev807:1ca418e6ed5d
next817:e9d2d9be7cb6
author nkeynes
date Sat Aug 09 11:17:06 2008 +0000 (15 years ago)
permissions -rw-r--r--
last change Remap 1C000000 .. 1FFFFFFF to the P4 region when accessed through TLB
lookup, as per the SH4 manual
file annotate diff log raw 
     1.1 --- a/src/sh4/mmu.c	Sat Aug 09 07:39:47 2008 +0000

     1.2 +++ b/src/sh4/mmu.c	Sat Aug 09 11:17:06 2008 +0000

     1.3 @@ -686,8 +686,11 @@

     1.4          }

     1.5  

     1.6          /* finally generate the target address */

     1.7 -        return (mmu_utlb[entryNo].ppn & mmu_utlb[entryNo].mask) | 

     1.8 -        (addr & (~mmu_utlb[entryNo].mask));

     1.9 +        sh4addr_t pma = (mmu_utlb[entryNo].ppn & mmu_utlb[entryNo].mask) | 

    1.10 +        	(addr & (~mmu_utlb[entryNo].mask));

    1.11 +        if( pma > 0x1C000000 ) // Remap 1Cxx .. 1Fxx region to P4 

    1.12 +        	pma |= 0xE0000000;

    1.13 +        return pma;

    1.14      }

    1.15  }

    1.16  

    1.17 @@ -746,8 +749,11 @@

    1.18          }

    1.19  

    1.20          /* finally generate the target address */

    1.21 -        return (mmu_utlb[entryNo].ppn & mmu_utlb[entryNo].mask) | 

    1.22 -        (addr & (~mmu_utlb[entryNo].mask));

    1.23 +        sh4addr_t pma = (mmu_utlb[entryNo].ppn & mmu_utlb[entryNo].mask) | 

    1.24 +        	(addr & (~mmu_utlb[entryNo].mask));

    1.25 +        if( pma > 0x1C000000 ) // Remap 1Cxx .. 1Fxx region to P4 

    1.26 +        	pma |= 0xE0000000;

    1.27 +        return pma;

    1.28      }

    1.29  }

    1.30
.