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[FREELDR] Move down the requirement of highest usable address

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This fixes PXE boot in QEMU, where highest usable address is 0x9c400.

svn path=/trunk/; revision=65127
This commit is contained in:
Hervé Poussineau 2014-10-30 20:22:57 +00:00
parent d23ef58d9e
commit a293927d33
1 changed files with 2 additions and 2 deletions
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4
reactos/boot/freeldr/freeldr/include/arch/pc/x86common.h
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@ -17,14 +17,14 @@
#define FREELDR_BASE HEX(F800)
#define FREELDR_PE_BASE HEX(10000)
#define DISKREADBUFFER HEX(8E000) /* Buffer to store data read in from the disk via the BIOS */
#define MEMORY_MARGIN HEX(9E000) /* Highest usable address */
#define MEMORY_MARGIN HEX(9C000) /* Highest usable address */
/* 9F000- 9FFFF is reserved for the EBDA */
#define DISKREADBUFFER_SIZE HEX(10000)
#define BIOSCALLBUFSEGMENT (BIOSCALLBUFFER/16) /* Buffer to store temporary data for any Int386() call */
#define BIOSCALLBUFOFFSET HEX(0000) /* Buffer to store temporary data for any Int386() call */
#define BIOSCALLBUFSIZE PAGE_SIZE /* max is sizeof(VESA_SVGA_INFO) = 512 */
#define MAX_FREELDR_PE_SIZE (DISKREADBUFFER - FREELDR_PE_BASE)
#define DISKREADBUFFER_SIZE (MEMORY_MARGIN - DISKREADBUFFER)
/* These addresses specify the realmode "BSS section" layout */
#define BSS_RealModeEntry (BSS_START + 0)