[PATCH 342] M68k head comments
From: Geert Uytterhoeven (geert_at_linux-m68k.org)
Date: 01/01/04
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Date: Thu, 1 Jan 2004 21:01:48 +0100 To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
M68k: Update some comments (from Roman Zippel)
--- linux-2.6.0/arch/m68k/kernel/head.S 13 Oct 2003 22:48:56 -0000 1.11
+++ linux-m68k-2.6.0/arch/m68k/kernel/head.S 13 Oct 2003 22:52:41 -0000
@@ -1250,9 +1250,9 @@
mmu_map #VIDEOMEMBASE,%d0,#VIDEOMEMSIZE,%d3
/* The ROM starts at 4000 0000 */
mmu_map_eq #0x40000000,#0x02000000,%d3
- /* IO devices */
+ /* IO devices (incl. serial port) from 5000 0000 to 5300 0000 */
mmu_map_eq #0x50000000,#0x03000000,%d3
- /* NuBus slot space */
+ /* Nubus slot space (video at 0xF0000000, rom at 0xF0F80000) */
mmu_map_tt #1,#0xf8000000,#0x08000000,%d3
jbra L(mmu_init_done)
@@ -1891,7 +1891,7 @@
movel %a4,%d5
addil #PAGESIZE<<13,%d5
movel %a0@+,%d6
- btst #1,%d6 /* is it a ptr? */
+ btst #1,%d6 /* is it a table ptr? */
jbne 31f /* yes */
btst #0,%d6 /* is it early terminating? */
jbeq 1f /* no */
@@ -1908,9 +1908,9 @@
movel %a4,%d5
addil #PAGESIZE<<6,%d5
movel %a1@+,%d6
- btst #1,%d6
- jbne 33f
- btst #0,%d6
+ btst #1,%d6 /* is it a table ptr? */
+ jbne 33f /* yes */
+ btst #0,%d6 /* is it a page descriptor? */
jbeq 1f /* no */
jbsr mmu_030_print_helper
jbra 37f
@@ -3154,7 +3154,7 @@
moveml %sp@+,%d0-%d7/%a2-%a6
jbra L(serial_putc_done)
2:
-#endif CONFIG_MVME16x
+#endif /* CONFIG_MVME16x */
#ifdef CONFIG_BVME6000
is_not_bvme6000(2f)
@@ -3369,10 +3369,10 @@
/*
* At this point we make a shift in register usage
- * a1 = address of Lconsole_font pointer
+ * a1 = address of console_font pointer
*/
lea %pc@(L(console_font)),%a1
- movel %a0,%a1@ /* store pointer to struct font_desc in Lconsole_font */
+ movel %a0,%a1@ /* store pointer to struct fbcon_font_desc in console_font */
tstl %a0
jeq 1f
@@ -3383,10 +3383,10 @@
* 6 x 11 also supported
*/
/* ASSERT: a0 = contents of Lconsole_font */
- movel %d3,%d0 /* screen width in pixels */
- divul %a0@(FONT_DESC_WIDTH),%d0 /* d0 = max num chars per row */
+ movel %d3,%d0 /* screen width in pixels */
+ divul %a0@(FONT_DESC_WIDTH),%d0 /* d0 = max num chars per row */
- movel %d4,%d1 /* screen height in pixels */
+ movel %d4,%d1 /* screen height in pixels */
divul %a0@(FONT_DESC_HEIGHT),%d1 /* d1 = max num rows */
movel %d0,%a2@(Lconsole_struct_num_columns)
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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