m68k/amiga: Fix "debug=mem"
`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>
diff --git a/arch/m68k/amiga/config.c b/arch/m68k/amiga/config.c
index b1577f7..82a4bb5 100644
--- a/arch/m68k/amiga/config.c
+++ b/arch/m68k/amiga/config.c
@@ -610,17 +610,17 @@
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 @@
amiga_console_driver.write = amiga_mem_console_write;
register_console(&amiga_console_driver);
-
-done:
return 0;
}