dec/prom/locore.S

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * locore.S
0004  */
0005 #include <asm/asm.h>
0006 #include <asm/regdef.h>
0007 #include <asm/mipsregs.h>
0008
0009     .text
0010
0011 /*
0012  * Simple general exception handling routine. This one is used for the
0013  * Memory sizing routine for pmax machines. HK
0014  */
0015
0016 NESTED(genexcept_early, 0, sp)
0017     .set    noat
0018     .set    noreorder
0019
0020     mfc0    k0, CP0_STATUS
0021     la  k1, mem_err
0022
0023     sw  k0, 0(k1)
0024
0025     mfc0    k0, CP0_EPC
0026     nop
0027     addiu   k0, 4       # skip the causing instruction
0028     jr  k0
0029      rfe
0030 END(genexcept_early)