blob: 00bab7d7c48ce9800dd0b277d9b1e7c29a7c4eb3 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
/* SPDX-License-Identifier: GPL-2.0 */
#include "ppc_asm.h"
.text
.global _zimage_start
_zimage_start:
/* PPC errata 213: needed by Virtex-4 FX */
mfccr0 0
oris 0,0,0x50000000@h
mtccr0 0
/*
* Invalidate the data cache if the data cache is turned off.
* - The 405 core does not invalidate the data cache on power-up
* or reset but does turn off the data cache. We cannot assume
* that the cache contents are valid.
* - If the data cache is turned on this must have been done by
* a bootloader and we assume that the cache contents are
* valid.
*/
mfdccr r9
cmplwi r9,0
bne 2f
lis r9,0
li r8,256
mtctr r8
1: dccci r0,r9
addi r9,r9,0x20
bdnz 1b
2: b _zimage_start_lib
|
