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m68k: Remove unused "cursor home" code from debug console

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The cursor home operation is unused and seems undesirable for logging.
Remove it. The console_not_cr label actually means "not line feed and
not carriage return either" so take the opportunity to replace it with
something less confusing. Rectify some inconsistent whitespace while
we're here.

Signed-off-by: Finn Thain <fthain@linux-m68k.org>
Tested-by: Stan Johnson <userm57@yahoo.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/ec2d443d3c3213028bbbab7c2e0382cd53db75fe.1743115195.git.fthain@linux-m68k.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Finn Thain 2025-03-28 09:39:55 +11:00 • committed by Geert Uytterhoeven
parent 0da6458417
commit e911044c28
1 changed files with 12 additions and 19 deletions
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31
arch/m68k/kernel/head.S
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@ -3555,28 +3555,21 @@ func_start console_putc,%a0/%a1/%d0-%d7
jra L(console_exit)
L(console_not_lf):
cmpib #13,%d7
jne L(console_not_cr)
cmpib #'\r',%d7
jne L(console_not_lf_not_cr)
clrl %a0@(Lconsole_struct_cur_column)
jra L(console_exit)
L(console_not_cr):
cmpib #1,%d7
jne L(console_not_home)
clrl %a0@(Lconsole_struct_cur_row)
clrl %a0@(Lconsole_struct_cur_column)
jra L(console_exit)
/*
* At this point we know that the %d7 character is going to be
* rendered on the screen. Register usage is -
* a0 = pointer to console globals
* a1 = font data
* d0 = cursor column
* d1 = cursor row to draw the character
* d7 = character number
*/
L(console_not_home):
/*
* At this point we know that the %d7 character is going to be
* rendered on the screen. Register usage is -
* a0 = pointer to console globals
* a1 = font data
* d0 = cursor column
* d1 = cursor row to draw the character
* d7 = character number
*/
L(console_not_lf_not_cr):
movel %a0@(Lconsole_struct_cur_column),%d0
movel %a0@(Lconsole_struct_cur_row),%d1