/*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, daniel@omicron.se
- *
+ *
* See file CREDITS for list of people who contributed to this
* project.
*
.section .bios, "ax"
.code16
.org 0
- /* a call to f000:0 should warmboot */
+ /* a call to f000:0 should warmboot */
jmp realmode_reset
-
+
.globl rm_int00
+.hidden rm_int00
+.type rm_int00, @function
rm_int00:
pushw $0
jmp any_interrupt16
.globl rm_int01
+.hidden rm_int01
+.type rm_int01, @function
rm_int01:
pushw $1
jmp any_interrupt16
.globl rm_int02
+.hidden rm_int02
+.type rm_int02, @function
rm_int02:
pushw $2
jmp any_interrupt16
.globl rm_int03
+.hidden rm_int03
+.type rm_int03, @function
rm_int03:
pushw $3
jmp any_interrupt16
.globl rm_int04
+.hidden rm_int04
+.type rm_int04, @function
rm_int04:
pushw $4
jmp any_interrupt16
.globl rm_int05
+.hidden rm_int05
+.type rm_int05, @function
rm_int05:
pushw $5
jmp any_interrupt16
.globl rm_int06
+.hidden rm_int06
+.type rm_int06, @function
rm_int06:
pushw $6
jmp any_interrupt16
.globl rm_int07
+.hidden rm_int07
+.type rm_int07, @function
rm_int07:
pushw $7
jmp any_interrupt16
.globl rm_int08
+.hidden rm_int08
+.type rm_int08, @function
rm_int08:
pushw $8
jmp any_interrupt16
.globl rm_int09
+.hidden rm_int09
+.type rm_int09, @function
rm_int09:
pushw $9
jmp any_interrupt16
.globl rm_int0a
+.hidden rm_int0a
+.type rm_int0a, @function
rm_int0a:
pushw $10
jmp any_interrupt16
.globl rm_int0b
+.hidden rm_int0b
+.type rm_int0b, @function
rm_int0b:
pushw $11
jmp any_interrupt16
.globl rm_int0c
+.hidden rm_int0c
+.type rm_int0c, @function
rm_int0c:
pushw $12
jmp any_interrupt16
.globl rm_int0d
+.hidden rm_int0d
+.type rm_int0d, @function
rm_int0d:
pushw $13
jmp any_interrupt16
.globl rm_int0e
+.hidden rm_int0e
+.type rm_int0e, @function
rm_int0e:
pushw $14
jmp any_interrupt16
.globl rm_int0f
+.hidden rm_int0f
+.type rm_int0f, @function
rm_int0f:
pushw $15
jmp any_interrupt16
.globl rm_int10
+.hidden rm_int10
+.type rm_int10, @function
rm_int10:
pushw $16
jmp any_interrupt16
.globl rm_int11
+.hidden rm_int11
+.type rm_int11, @function
rm_int11:
pushw $17
jmp any_interrupt16
.globl rm_int12
+.hidden rm_int12
+.type rm_int12, @function
rm_int12:
pushw $18
jmp any_interrupt16
.globl rm_int13
+.hidden rm_int13
+.type rm_int13, @function
rm_int13:
pushw $19
jmp any_interrupt16
.globl rm_int14
+.hidden rm_int14
+.type rm_int14, @function
rm_int14:
pushw $20
jmp any_interrupt16
.globl rm_int15
+.hidden rm_int15
+.type rm_int15, @function
rm_int15:
pushw $21
jmp any_interrupt16
.globl rm_int16
+.hidden rm_int16
+.type rm_int16, @function
rm_int16:
pushw $22
jmp any_interrupt16
.globl rm_int17
+.hidden rm_int17
+.type rm_int17, @function
rm_int17:
pushw $23
jmp any_interrupt16
.globl rm_int18
+.hidden rm_int18
+.type rm_int18, @function
rm_int18:
pushw $24
jmp any_interrupt16
.globl rm_int19
+.hidden rm_int19
+.type rm_int19, @function
rm_int19:
pushw $25
jmp any_interrupt16
.globl rm_int1a
+.hidden rm_int1a
+.type rm_int1a, @function
rm_int1a:
pushw $26
jmp any_interrupt16
.globl rm_int1b
+.hidden rm_int1b
+.type rm_int1b, @function
rm_int1b:
pushw $27
jmp any_interrupt16
.globl rm_int1c
+.hidden rm_int1c
+.type rm_int1c, @function
rm_int1c:
pushw $28
jmp any_interrupt16
.globl rm_int1d
+.hidden rm_int1d
+.type rm_int1d, @function
rm_int1d:
pushw $29
jmp any_interrupt16
.globl rm_int1e
+.hidden rm_int1e
+.type rm_int1e, @function
rm_int1e:
pushw $30
jmp any_interrupt16
.globl rm_int1f
+.hidden rm_int1f
+.type rm_int1f, @function
rm_int1f:
pushw $31
jmp any_interrupt16
.globl rm_def_int
+.hidden rm_def_int
+.type rm_def_int, @function
rm_def_int:
iret
-
+
/*
* All interrupt jumptable entries jump to here
* after pushing the interrupt vector number onto the
* stack.
*/
any_interrupt16:
- MAKE_BIOS_STACK
+ MAKE_BIOS_STACK
gs movw OFFS_VECTOR(%bp), %ax
cmpw $0x10, %ax
- je Lint_10h
+ je Lint_10h
cmpw $0x11, %ax
je Lint_11h
cmpw $0x12, %ax
Lint_10h: /* VGA BIOS services */
call bios_10h
jmp Lout
-Lint_11h:
+Lint_11h:
call bios_11h
jmp Lout
-Lint_12h:
+Lint_12h:
call bios_12h
jmp Lout
Lint_13h: /* BIOS disk services */
Lint_1ah: /* PCI bios */
call bios_1ah
jmp Lout
-Lout:
+Lout:
cmpw $0, %ax
je Lhandeled
-
+
/* Insert code for unhandeled INTs here.
*
- * ROLO prints a message to the console
+ * ROLO prints a message to the console
* (we could do that but then we're in 16bit mode
* so we'll have to get back into 32bit mode
* to use the console I/O routines (if we do this
/*
************************************************************
- * BIOS interrupt 10h -- VGA services
+ * BIOS interrupt 10h -- VGA services
************************************************************
*/
bios_10h:
bios_11h:
cs movw bios_equipment, %ax
-gs movw %ax, OFFS_AX(%bp)
+gs movw %ax, OFFS_AX(%bp)
xorw %ax, %ax
ret
/*
************************************************************
- * BIOS interrupt 12h -- Get Memory Size
+ * BIOS interrupt 12h -- Get Memory Size
************************************************************
*/
bios_12h:
je Lfunc_15h
movw $0xffff, %ax
ret
-Lfunc_15h:
+Lfunc_15h:
gs movw OFFS_AX(%bp), %ax
andw $0xff, %ax /* return AH=0->drive not present */
gs movw %ax, OFFS_AX(%bp)
xorw %ax, %ax
ret
-
-
+
/*
***********************************************************
movw $0xffff, %ax
ret
-Lfunc_c0h: /* Return System Configuration Parameters (PS2 only) */
+Lfunc_c0h: /* Return System Configuration Parameters (PS2 only) */
gs movw OFFS_FLAGS(%bp), %ax
orw $1, %ax /* return carry -- function not supported */
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
+
Lfunc_e8h:
gs movw OFFS_AX(%bp), %ax
andw $0xff, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
+
Lfunc_e801h: /* Get memory size for >64M Configurations */
cs movw ram_in_64kb_chunks, %ax
cmpw $0x100, %ax
ja e801_more_than_16mb
shlw $6, %ax /* multiply by 64 */
subw $0x400, %ax /* 1st meg does not count */
-
-gs movw %ax, OFFS_AX(%bp) /* return memory size between 1M and 16M in 1kb chunks in AX and CX */
+
+gs movw %ax, OFFS_AX(%bp) /* return memory size between 1M and 16M in 1kb chunks in AX and CX */
gs movw %ax, OFFS_CX(%bp)
gs movw $0, OFFS_BX(%bp) /* set BX and DX to 0*/
-gs movw $0, OFFS_DX(%bp)
+gs movw $0, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
andw $0xfffe, %ax /* clear carry -- function succeeded */
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
+
e801_more_than_16mb:
- subw $0x100, %ax /* subtract 16MB */
-
+ subw $0x100, %ax /* subtract 16MB */
+
gs movw $0x3c00, OFFS_AX(%bp) /* return 0x3c00 (16MB-1MB) in AX and CX */
gs movw $0x3c00, OFFS_CX(%bp)
gs movw %ax, OFFS_BX(%bp) /* set BX and DX to number of 64kb chunks above 16MB */
-gs movw %ax, OFFS_DX(%bp)
+gs movw %ax, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
andw $0xfffe, %ax /* clear carry -- function succeeded */
b88_not_more_than16:
shlw $6, %ax
subw $0x400, %ax /* 1st meg does not count */
-
+
gs movw %ax, OFFS_AX(%bp) /* return number of kilobytes between 16MB and 16MB in ax */
gs movw OFFS_FLAGS(%bp), %ax
.globl ram_in_64kb_chunks
+.hidden ram_in_64kb_chunks
+.type ram_in_64kb_chunks, @function
ram_in_64kb_chunks:
- .word 0
+ .word 0
.globl bios_equipment
+.hidden bios_equipment
+.type bios_equipment, @function
bios_equipment:
- .word 0
-
+ .word 0