/*
* (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* See file CREDITS for list of people who contributed to this
* project.
rm_def_int:
iret
-
/*
- * All interrupt jumptable entries jump to here
- * after pushing the interrupt vector number onto the
- * stack.
+ * All interrupt jumptable entries jump to here after pushing the
+ * interrupt vector number onto the stack.
*/
any_interrupt16:
MAKE_BIOS_STACK
je Lint_1ah
movw $0xffff, %ax
jmp Lout
-Lint_10h: /* VGA BIOS services */
+Lint_10h:
+ /* VGA BIOS services */
call bios_10h
jmp Lout
Lint_11h:
Lint_12h:
call bios_12h
jmp Lout
-Lint_13h: /* BIOS disk services */
+Lint_13h:
+ /* BIOS disk services */
call bios_13h
jmp Lout
-Lint_15h: /* Misc. BIOS services */
+Lint_15h:
+ /* Misc. BIOS services */
call bios_15h
jmp Lout
-Lint_16h: /* keyboard services */
+Lint_16h:
+ /* keyboard services */
call bios_16h
jmp Lout
-Lint_1ah: /* PCI bios */
+Lint_1ah:
+ /* PCI bios */
call bios_1ah
jmp Lout
Lout:
cmpw $0, %ax
je Lhandeled
- /* Insert code for unhandeled INTs here.
+ /*
+ * Insert code for unhandeled INTs here.
*
- * 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
- * we shuls make int 0x10 and int 0x16 work as well))
+ * 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 we should make
+ * int 0x10 and int 0x16 work as well)
*/
Lhandeled:
RESTORE_CALLERS_STACK
- addw $2,%sp /* dump vector number */
- iret /* return from interrupt */
+ /* dump vector number */
+ addw $2,%sp
+
+ /* return from interrupt */
+ iret
/*
************************************************************
je Lvid_cfg
movw $0xffff, %ax
ret
-Lcur_pos: /* Read Cursor Position and Size */
+Lcur_pos:
+ /* Read Cursor Position and Size */
gs movw $0, OFFS_CX(%bp)
gs movw $0, OFFS_DX(%bp)
xorw %ax, %ax
ret
-Lvid_state: /* Get Video State */
-gs movw $(80 << 8|0x03), OFFS_AX(%bp) /* 80 columns, 80x25, 16 colors */
+Lvid_state:
+ /* Get Video State - 80 columns, 80x25, 16 colors */
+gs movw $(80 << 8|0x03), OFFS_AX(%bp)
gs movw $0, OFFS_BX(%bp)
xorw %ax, %ax
ret
-Lvid_cfg: /* Video Subsystem Configuration (EGA/VGA) */
-gs movw $0x10, OFFS_BX(%bp) /* indicate CGA/MDA/HGA */
+Lvid_cfg:
+ /* Video Subsystem Configuration (EGA/VGA) - indicate CGA/MDA/HGA */
+gs movw $0x10, OFFS_BX(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 11h -- Equipment determination
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 12h -- Get Memory Size
b12_more_than_640k:
movw $0x280, %ax
b12_return:
-gs movw %ax, OFFS_AX(%bp) /* return number of kilobytes in ax */
+ /* return number of kilobytes in ax */
+gs movw %ax, OFFS_AX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 13h -- Disk services
ret
Lfunc_15h:
gs movw OFFS_AX(%bp), %ax
- andw $0xff, %ax /* return AH=0->drive not present */
+
+ /* return AH=0->drive not present */
+ andw $0x00ff, %ax
gs movw %ax, OFFS_AX(%bp)
xorw %ax, %ax
ret
-
/*
***********************************************************
* BIOS interrupt 15h -- Miscellaneous services
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 */
+
+ /* return carry -- function not supported */
+ orw $1, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
cmpw $1, %ax
je Lfunc_e801h
gs movw OFFS_FLAGS(%bp), %ax
- orw $1, %ax /* return carry -- function not supported */
+
+ /* return carry -- function not supported */
+ orw $1, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-Lfunc_e801h: /* Get memory size for >64M Configurations */
+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 */
+ /* multiply by 64 */
+ shlw $6, %ax
+
+ /* 1st meg does not count */
+ subw $0x400, %ax
+
+ /* return memory size between 1M and 16M in 1kb chunks in AX and CX */
+gs movw %ax, OFFS_AX(%bp)
gs movw %ax, OFFS_CX(%bp)
-gs movw $0, OFFS_BX(%bp) /* set BX and DX to 0*/
+
+ /* set BX and DX to 0*/
+gs movw $0, OFFS_BX(%bp)
gs movw $0, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
e801_more_than_16mb:
- subw $0x100, %ax /* subtract 16MB */
+ /* subtract 16MB */
+ subw $0x100, %ax
-gs movw $0x3c00, OFFS_AX(%bp) /* return 0x3c00 (16MB-1MB) in AX and CX */
+ /* return 0x3c00 (16MB-1MB) in AX and CX */
+gs movw $0x3c00, OFFS_AX(%bp)
gs movw $0x3c00, OFFS_CX(%bp)
-gs movw %ax, OFFS_BX(%bp) /* set BX and DX to number of 64kb chunks above 16MB */
+
+ /* set BX and DX to number of 64kb chunks above 16MB */
+gs movw %ax, OFFS_BX(%bp)
gs movw %ax, OFFS_DX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
movw $0x100, %ax
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 */
+ /* 1st meg does not count */
+ subw $0x400, %ax
+
+ /* return number of kilobytes between 16MB and 16MB in ax */
+gs movw %ax, OFFS_AX(%bp)
gs movw OFFS_FLAGS(%bp), %ax
- andw $0xfffe, %ax /* clear carry -- function succeeded */
+
+ /* clear carry -- function succeeded */
+ andw $0xfffe, %ax
gs movw %ax, OFFS_FLAGS(%bp)
xorw %ax, %ax
ret
-
/*
************************************************************
* BIOS interrupt 16h -- keyboard services
movw $0xffff, %ax
ret
Lfunc_03h:
- xorw %ax, %ax /* do nothing -- function not supported */
+ /* do nothing -- function not supported */
+ xorw %ax, %ax
ret
/*
ret
Lfunc_b1h:
call realmode_pci_bios
- xorw %ax, %ax /* do nothing -- function not supported */
+
+ /* do nothing -- function not supported */
+ xorw %ax, %ax
ret
projects / u-boot / blobdiff