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On Nintendo Wii CPUs, the mdp value will be garbage. Set it to NULL

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so as to not confuse things.

Submitted by:	Margarida Gouveia
This commit is contained in:
Adrian Chadd 2012-08-21 06:34:21 +00:00
parent 9ced87e9cd
commit 2467c62fc6
2 changed files with 10 additions and 1 deletions
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10
sys/powerpc/aim/machdep.c
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@ -257,7 +257,7 @@ powerpc_init(vm_offset_t startkernel, vm_offset_t endkernel,
size_t trap_offset;
void *kmdp;
char *env;
register_t msr, scratch;
register_t msr, scratch, vers;
uint8_t *cache_check;
int cacheline_warn;
#ifndef __powerpc64__
@ -268,6 +268,14 @@ powerpc_init(vm_offset_t startkernel, vm_offset_t endkernel,
trap_offset = 0;
cacheline_warn = 0;
/*
* The Wii loader doesn't pass us any environment so, mdp
* points to garbage at this point. The Wii CPU is a 750CL.
*/
vers = mfpvr();
if ((vers & 0xfffff0e0) == (MPC750 << 16 | MPC750CL))
mdp = NULL;
/*
* Parse metadata if present and fetch parameters. Must be done
* before console is inited so cninit gets the right value of

1
sys/powerpc/include/spr.h
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@ -140,6 +140,7 @@
#define MPC603e 0x0006
#define MPC603ev 0x0007
#define MPC750 0x0008
#define MPC750CL 0x7000 /* Nintendo Wii's Broadway */
#define MPC604ev 0x0009
#define MPC7400 0x000c
#define MPC620 0x0014