[PULL 26/41] target/ppc: 405: Program exception cleanup

[Cédric Le Goater]

From: Fabiano Rosas <farosas@linux.ibm.com>

The 405 Program Interrupt does not set SRR1 with any diagnostic bits,
just a clean copy of the MSR.

We're using the BookE Exception Syndrome Register which is different
from the 405.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[ clg: restored SPR_40x_ESR settings ]
Message-Id: <20220118184448.852996-14-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 target/ppc/excp_helper.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 7d89bd0651d8..b528457d9298 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -483,30 +483,19 @@ static void powerpc_excp_40x(PowerPCCPU *cpu, int excp)
                 env->error_code = 0;
                 return;
             }
-
-            /*
-             * FP exceptions always have NIP pointing to the faulting
-             * instruction, so always use store_next and claim we are
-             * precise in the MSR.
-             */
-            msr |= 0x00100000;
-            env->spr[SPR_BOOKE_ESR] = ESR_FP;
+            env->spr[SPR_40x_ESR] = ESR_FP;
             break;
         case POWERPC_EXCP_INVAL:
             trace_ppc_excp_inval(env->nip);
-            msr |= 0x00080000;
-            env->spr[SPR_BOOKE_ESR] = ESR_PIL;
+            env->spr[SPR_40x_ESR] = ESR_PIL;
             break;
         case POWERPC_EXCP_PRIV:
-            msr |= 0x00040000;
-            env->spr[SPR_BOOKE_ESR] = ESR_PPR;
+            env->spr[SPR_40x_ESR] = ESR_PPR;
             break;
         case POWERPC_EXCP_TRAP:
-            msr |= 0x00020000;
-            env->spr[SPR_BOOKE_ESR] = ESR_PTR;
+            env->spr[SPR_40x_ESR] = ESR_PTR;
             break;
         default:
-            /* Should never occur */
             cpu_abort(cs, "Invalid program exception %d. Aborting\n",
                       env->error_code);
             break;
-- 
2.34.1