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fixed comments in paging.cc

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This commit is contained in:
Stanislav Shwartsman 2012-02-28 22:39:33 +00:00
parent 1f14c171ed
commit c52d97cb7f
1 changed files with 6 additions and 6 deletions
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12
bochs/cpu/paging.cc
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@ -303,7 +303,7 @@ static const Bit8u priv_check[BX_PRIV_CHECK_SIZE] =
// value, necessitating a TLB flush when CR0.WP changes.
//
// The test is:
// OK = (accessBits & ((E<<2) | (W<<1) | U)) <> 0
// OK = (accessBits & ((E<<2) | (W<<1) | U)) == 0
//
// where E:1=Execute, 0=Data;
// W:1=Write, 0=Read;
@ -316,11 +316,11 @@ static const Bit8u priv_check[BX_PRIV_CHECK_SIZE] =
// and for code fetches:
// OK = 0x4 | ( U )
//
// Note, that the TLB should have TLB_NoHostPtr bit set when direct
// access through host pointer is NOT allowed for the page. A memory
// operation asking for a direct access through host pointer will
// set TLB_NoHostPtr bit in its lpf field and thus get TLB miss result
// when the direct access is not allowed.
// Note, that the TLB should have TLB_NoHostPtr bit set in the lpf when
// direct access through host pointer is NOT allowed for the page.
// A memory operation asking for a direct access through host pointer
// will not set TLB_NoHostPtr bit in its lpf and thus get TLB miss
// result when the direct access is not allowed.
//
#define TLB_NoHostPtr (0x800) /* set this bit when direct access is NOT allowed */