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261bd4bc56
* conf/i386-pc.rmk (GRUB_MEMORY_MACHINE_LINK_ADDR): New variable.
(kernel_img_LDFLAGS): Use `GRUB_MEMORY_MACHINE_LINK_ADDR' as link
address.
(grub_mkimage_CFLAGS): Propagate `GRUB_MEMORY_MACHINE_LINK_ADDR' as
a C macro.
* include/grub/i386/pc/memory.h (GRUB_MEMORY_MACHINE_UPPER): New macro.
Indicates start of upper memory.
* util/i386/pc/grub-mkimage.c: Include `<grub/machine/memory.h>'.
(generate_image): Abort when image size is big enough to corrupt
upper memory.
* include/grub/i386/pc/vga.h: Include `<grub/machine/memory.h>'.
(GRUB_MEMORY_MACHINE_VGA_ADDR): Alias for `GRUB_MEMORY_MACHINE_UPPER'.
* term/i386/pc/vga.c (VGA_MEM): Use `GRUB_MEMORY_MACHINE_VGA_ADDR'
instead of hardcoding 0xA0000.
* video/i386/pc/vbe.c: Include `<grub/machine/vga.h>'.
(grub_vbe_set_video_mode): Use `GRUB_MEMORY_MACHINE_VGA_ADDR'
instead of hardcoding 0xA0000.
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/* memory.h - describe the memory map */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2007,2008 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_MEMORY_MACHINE_HEADER
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#define GRUB_MEMORY_MACHINE_HEADER 1
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#include <grub/symbol.h>
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#ifndef ASM_FILE
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#include <grub/types.h>
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#endif
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/* The scratch buffer used in real mode code. */
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#define GRUB_MEMORY_MACHINE_SCRATCH_ADDR 0x68000
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#define GRUB_MEMORY_MACHINE_SCRATCH_SEG (GRUB_MEMORY_MACHINE_SCRATCH_ADDR >> 4)
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#define GRUB_MEMORY_MACHINE_SCRATCH_SIZE 0x10000
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/* The real mode stack. */
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#define GRUB_MEMORY_MACHINE_REAL_STACK (0x2000 - 0x10)
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/* The size of the protect mode stack. */
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#define GRUB_MEMORY_MACHINE_PROT_STACK_SIZE 0x8000
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/* The upper memory area (starting at 640 kiB). */
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#define GRUB_MEMORY_MACHINE_UPPER 0xa0000
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/* The protected mode stack. */
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#define GRUB_MEMORY_MACHINE_PROT_STACK \
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(GRUB_MEMORY_MACHINE_SCRATCH_ADDR + GRUB_MEMORY_MACHINE_SCRATCH_SIZE \
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+ GRUB_MEMORY_MACHINE_PROT_STACK_SIZE - 0x10)
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/* The memory area where GRUB uses its own purpose. This part is not added
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into free memory for dynamic allocations. */
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#define GRUB_MEMORY_MACHINE_RESERVED_START \
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GRUB_MEMORY_MACHINE_SCRATCH_ADDR
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#define GRUB_MEMORY_MACHINE_RESERVED_END \
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(GRUB_MEMORY_MACHINE_PROT_STACK + 0x10)
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/* The area where GRUB is decompressed at early startup. */
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#define GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR 0x100000
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/* The address of a partition table passed to another boot loader. */
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#define GRUB_MEMORY_MACHINE_PART_TABLE_ADDR 0x7be
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/* The address where another boot loader is loaded. */
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#define GRUB_MEMORY_MACHINE_BOOT_LOADER_ADDR 0x7c00
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/* The flag for protected mode. */
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#define GRUB_MEMORY_MACHINE_CR0_PE_ON 0x1
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/* The code segment of the protected mode. */
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#define GRUB_MEMORY_MACHINE_PROT_MODE_CSEG 0x8
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/* The data segment of the protected mode. */
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#define GRUB_MEMORY_MACHINE_PROT_MODE_DSEG 0x10
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/* The code segment of the pseudo real mode. */
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#define GRUB_MEMORY_MACHINE_PSEUDO_REAL_CSEG 0x18
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/* The data segment of the pseudo real mode. */
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#define GRUB_MEMORY_MACHINE_PSEUDO_REAL_DSEG 0x20
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#ifndef ASM_FILE
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extern grub_size_t EXPORT_VAR(grub_lower_mem);
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extern grub_size_t EXPORT_VAR(grub_upper_mem);
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#endif
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#endif /* ! GRUB_MEMORY_MACHINE_HEADER */
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