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[freeldr/i386] Read up to 128 sectors at once

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svn path=/trunk/; revision=43565
This commit is contained in:
Hervé Poussineau
2009-10-18 18:24:35 +00:00
parent 125296305f
commit 9c62b2152a
3 changed files with 13 additions and 10 deletions
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reactos/boot/freeldr/freeldr/arch/i386/hardware.c
+6 -5
View File
@@ -467,7 +467,7 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
{
DISKCONTEXT* Context = FsGetDeviceSpecific(FileId);
UCHAR* Ptr = (UCHAR*)Buffer;
ULONG i, Length;
ULONG i, Length, Sectors;
BOOLEAN ret;
*Count = 0;
@@ -475,12 +475,13 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
while (N > 0)
{
Length = N;
if (Length > Context->SectorSize)
Length = Context->SectorSize;
if (Length > DISKREADBUFFER_SIZE)
Length = DISKREADBUFFER_SIZE;
Sectors = (Length + Context->SectorSize - 1) / Context->SectorSize;
ret = MachDiskReadLogicalSectors(
Context->DriveNumber,
Context->SectorNumber + Context->SectorOffset + i,
1,
Sectors,
(PVOID)DISKREADBUFFER);
if (!ret)
return EIO;
@@ -488,7 +489,7 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
Ptr += Length;
*Count += Length;
N -= Length;
i++;
i += Sectors;
}
return ESUCCESS;
reactos/boot/freeldr/freeldr/arch/i386/xboxhw.c
+6 -5
View File
@@ -168,7 +168,7 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
{
DISKCONTEXT* Context = FsGetDeviceSpecific(FileId);
UCHAR* Ptr = (UCHAR*)Buffer;
ULONG i, Length;
ULONG i, Length, Sectors;
BOOLEAN ret;
*Count = 0;
@@ -176,12 +176,13 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
while (N > 0)
{
Length = N;
if (Length > Context->SectorSize)
Length = Context->SectorSize;
if (Length > DISKREADBUFFER_SIZE)
Length = DISKREADBUFFER_SIZE;
Sectors = (Length + Context->SectorSize - 1) / Context->SectorSize;
ret = MachDiskReadLogicalSectors(
Context->DriveNumber,
Context->SectorNumber + Context->SectorOffset + i,
1,
Sectors,
(PVOID)DISKREADBUFFER);
if (!ret)
return EIO;
@@ -189,7 +190,7 @@ static LONG DiskRead(ULONG FileId, VOID* Buffer, ULONG N, ULONG* Count)
Ptr += Length;
*Count += Length;
N -= Length;
i++;
i += Sectors;
}
return ESUCCESS;
reactos/boot/freeldr/freeldr/include/arch.h
+1
View File
@@ -46,6 +46,7 @@
#define BIOSCALLBUFOFFSET 0x0000 /* Buffer to store temporary data for any Int386() call */
#define FILESYSBUFFER 0x80000 /* Buffer to store file system data (e.g. cluster buffer for FAT) */
#define DISKREADBUFFER 0x90000 /* Buffer to store data read in from the disk via the BIOS */
#define DISKREADBUFFER_SIZE 0x10000
#elif defined(_M_PPC) || defined(_M_MIPS) || defined(_M_ARM)
#define DISKREADBUFFER 0x80000000
#define FILESYSBUFFER 0x80000000