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sparc32: Add back early sun4/sun4c detection so we can warn properly.

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We need to do the check before we try to remap the kernel using
SRMMU operations.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-05-12 01:02:11 -07:00
parent ee906c9e0b
commit 9b4c514ad2
1 changed files with 23 additions and 0 deletions
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23
arch/sparc/kernel/head_32.S
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@ -532,6 +532,29 @@ copy_prom_done:
be go_to_highmem ! this will be a nop then be go_to_highmem ! this will be a nop then
nop nop
/* Validate that we are in fact running on an
* SRMMU based cpu.
*/
set 0x4000, %g6
cmp %g7, %g6
bne not_a_sun4
nop
halt_sun4_or_sun4c:
ld [%g7 + 0x68], %o1
set sun4c_notsup, %o0
sub %o0, %l6, %o0
call %o1
nop
ba halt_me
nop
not_a_sun4:
lda [%g0] ASI_M_MMUREGS, %g1
andcc %g1, 1, %g0
be halt_sun4_or_sun4c
nop
srmmu_remap: srmmu_remap:
/* First, check for a viking (TI) module. */ /* First, check for a viking (TI) module. */
set 0x40000000, %g2 set 0x40000000, %g2