7034228792
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
70 lines
1.5 KiB
ArmAsm
70 lines
1.5 KiB
ArmAsm
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 2006 Cavium Networks
|
|
* Cache error handler
|
|
*/
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/stackframe.h>
|
|
|
|
/*
|
|
* Handle cache error. Indicate to the second level handler whether
|
|
* the exception is recoverable.
|
|
*/
|
|
LEAF(except_vec2_octeon)
|
|
|
|
.set push
|
|
.set mips64r2
|
|
.set noreorder
|
|
.set noat
|
|
|
|
|
|
/* due to an errata we need to read the COP0 CacheErr (Dcache)
|
|
* before any cache/DRAM access */
|
|
|
|
rdhwr k0, $0 /* get core_id */
|
|
PTR_LA k1, cache_err_dcache
|
|
sll k0, k0, 3
|
|
PTR_ADDU k1, k0, k1 /* k1 = &cache_err_dcache[core_id] */
|
|
|
|
dmfc0 k0, CP0_CACHEERR, 1
|
|
sd k0, (k1)
|
|
dmtc0 $0, CP0_CACHEERR, 1
|
|
|
|
/* check whether this is a nested exception */
|
|
mfc0 k1, CP0_STATUS
|
|
andi k1, k1, ST0_EXL
|
|
beqz k1, 1f
|
|
nop
|
|
j cache_parity_error_octeon_non_recoverable
|
|
nop
|
|
|
|
/* exception is recoverable */
|
|
1: j handle_cache_err
|
|
nop
|
|
|
|
.set pop
|
|
END(except_vec2_octeon)
|
|
|
|
/* We need to jump to handle_cache_err so that the previous handler
|
|
* can fit within 0x80 bytes. We also move from 0xFFFFFFFFAXXXXXXX
|
|
* space (uncached) to the 0xFFFFFFFF8XXXXXXX space (cached). */
|
|
LEAF(handle_cache_err)
|
|
.set push
|
|
.set noreorder
|
|
.set noat
|
|
|
|
SAVE_ALL
|
|
KMODE
|
|
jal cache_parity_error_octeon_recoverable
|
|
nop
|
|
j ret_from_exception
|
|
nop
|
|
|
|
.set pop
|
|
END(handle_cache_err)
|