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-rw-r--r--cpu/i386/start16.S112
1 files changed, 0 insertions, 112 deletions
diff --git a/cpu/i386/start16.S b/cpu/i386/start16.S
deleted file mode 100644
index 1ebb6bc..0000000
--- a/cpu/i386/start16.S
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * U-boot - i386 Startup Code
- *
- * Copyright (c) 2002, 2003 Omicron Ceti AB, Daniel Engström <denaiel@omicron.se>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-
-#define BOOT_SEG 0xffff0000 /* linear segment of boot code */
-#define a32 .byte 0x67;
-#define o32 .byte 0x66;
-
-.section .start16, "ax"
-.code16
-.globl start16
-start16:
- /* First we let the BSP do some early initialization
- * this code have to map the flash to its final position
- */
- mov $board_init16_ret, %bp
- jmp board_init16
-board_init16_ret:
-
- /* Turn of cache (this might require a 486-class CPU) */
- movl %cr0, %eax
- orl $0x60000000,%eax
- movl %eax, %cr0
- wbinvd
-
- /* load the descriptor tables */
-o32 cs lidt idt_ptr
-o32 cs lgdt gdt_ptr
-
-
- /* Now, we enter protected mode */
- movl %cr0, %eax
- orl $1,%eax
- movl %eax, %cr0
-
- /* Flush the prefetch queue */
- jmp ff
-ff:
-
- /* Finally jump to the 32bit initialization code */
- movw $code32start, %ax
- movw %ax,%bp
-o32 cs ljmp *(%bp)
-
- /* 48-bit far pointer */
-code32start:
- .long _start /* offset */
- .word 0x10 /* segment */
-
-idt_ptr:
- .word 0 /* limit */
- .long 0 /* base */
-
-gdt_ptr:
- .word 0x30 /* limit (48 bytes = 6 GDT entries) */
- .long BOOT_SEG + gdt /* base */
-
- /* The GDT table ...
- *
- * Selector Type
- * 0x00 NULL
- * 0x08 Unused
- * 0x10 32bit code
- * 0x18 32bit data/stack
- * 0x20 16bit code
- * 0x28 16bit data/stack
- */
-
-gdt:
- .word 0, 0, 0, 0 /* NULL */
- .word 0, 0, 0, 0 /* unused */
-
- .word 0xFFFF /* 4Gb - (0x100000*0x1000 = 4Gb) */
- .word 0 /* base address = 0 */
- .word 0x9B00 /* code read/exec */
- .word 0x00CF /* granularity = 4096, 386 (+5th nibble of limit) */
-
- .word 0xFFFF /* 4Gb - (0x100000*0x1000 = 4Gb) */
- .word 0x0 /* base address = 0 */
- .word 0x9300 /* data read/write */
- .word 0x00CF /* granularity = 4096, 386 (+5th nibble of limit) */
-
- .word 0xFFFF /* 64kb */
- .word 0 /* base address = 0 */
- .word 0x9b00 /* data read/write */
- .word 0x0010 /* granularity = 1 (+5th nibble of limit) */
-
- .word 0xFFFF /* 64kb */
- .word 0 /* base address = 0 */
- .word 0x9300 /* data read/write */
- .word 0x0010 /* granularity = 1 (+5th nibble of limit) */