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mips: set CP0 Debug DExcCode for SDBBP instruction

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This patch fixes setting DExcCode field of CP0 Debug register
when SDBBP instruction is executed. According to EJTAG specification,
this field must be set to the value 9 (Bp).

Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Message-id: 20170502120350.3368.92338.stgit@PASHA-ISP
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Pavel Dovgalyuk 2017-06-23 12:41:16 +02:00 committed by Aurelien Jarno
parent 77031ee1ce
commit c6c2c0fc32
1 changed files with 2 additions and 0 deletions
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2
target/mips/helper.c
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@ -627,6 +627,8 @@ void mips_cpu_do_interrupt(CPUState *cs)
goto set_DEPC; goto set_DEPC;
case EXCP_DBp: case EXCP_DBp:
env->CP0_Debug |= 1 << CP0DB_DBp; env->CP0_Debug |= 1 << CP0DB_DBp;
/* Setup DExcCode - SDBBP instruction */
env->CP0_Debug = (env->CP0_Debug & ~(0x1fULL << CP0DB_DEC)) | 9 << CP0DB_DEC;
goto set_DEPC; goto set_DEPC;
case EXCP_DDBS: case EXCP_DDBS:
env->CP0_Debug |= 1 << CP0DB_DDBS; env->CP0_Debug |= 1 << CP0DB_DDBS;