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m68k/amiga: Fix "debug=mem"

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`debug=mem' on Amiga has been broken for a while.
early_param() processing is done very/too early, i.e. before
amiga_identify() / amiga_chip_init(), causing amiga_savekmsg_setup() not
to find any Chip RAM.

As we don't plan to free this memory anyway, just steal it from the initial
Chip RAM memory block instead.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This commit is contained in:
Geert Uytterhoeven 2011-01-07 13:25:29 +01:00
parent de339e4b79
commit 5df1abdbd3
1 changed files with 7 additions and 9 deletions
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16
arch/m68k/amiga/config.c
View file

@ -610,17 +610,17 @@ static void amiga_mem_console_write(struct console *co, const char *s,
static int __init amiga_savekmsg_setup(char *arg)
{
static struct resource debug_res = { .name = "Debug" };
if (!MACH_IS_AMIGA || strcmp(arg, "mem"))
goto done;
return 0;
if (!AMIGAHW_PRESENT(CHIP_RAM)) {
printk("Warning: no chipram present for debugging\n");
goto done;
if (amiga_chip_size < SAVEKMSG_MAXMEM) {
pr_err("Not enough chipram for debugging\n");
return -ENOMEM;
}
savekmsg = amiga_chip_alloc_res(SAVEKMSG_MAXMEM, &debug_res);
/* Just steal the block, the chipram allocator isn't functional yet */
amiga_chip_size -= SAVEKMSG_MAXMEM;
savekmsg = (void *)ZTWO_VADDR(CHIP_PHYSADDR + amiga_chip_size);
savekmsg->magic1 = SAVEKMSG_MAGIC1;
savekmsg->magic2 = SAVEKMSG_MAGIC2;
savekmsg->magicptr = ZTWO_PADDR(savekmsg);
@ -628,8 +628,6 @@ static int __init amiga_savekmsg_setup(char *arg)
amiga_console_driver.write = amiga_mem_console_write;
register_console(&amiga_console_driver);
done:
return 0;
}