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[8/8] target/ppc: 74xx: Set SRRs directly in exception code

Message ID 20220126164200.1048677-9-farosas@linux.ibm.com
State New
Headers show
Series target/ppc: powerpc_excp improvements [74xx] (5/n) | expand

Commit Message

Fabiano Rosas Jan. 26, 2022, 4:42 p.m. UTC 
The 74xx does not have alternate/hypervisor Save and Restore
Registers, so we can set SRR0 and SRR1 directly.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
---
 target/ppc/excp_helper.c | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)
diff mbox series

Patch

diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 9d4ee7f928..087257462a 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -556,7 +556,6 @@  static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
     CPUState *cs = CPU(cpu);
     CPUPPCState *env = &cpu->env;
     target_ulong msr, new_msr, vector;
-    int srr0, srr1;
 
     if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) {
         cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp);
@@ -575,10 +574,6 @@  static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
      */
     new_msr = env->msr & ((target_ulong)1 << MSR_ME);
 
-    /* target registers */
-    srr0 = SPR_SRR0;
-    srr1 = SPR_SRR1;
-
     /*
      * Hypervisor emulation assistance interrupt only exists on server
      * arch 2.05 server or later.
@@ -709,10 +704,6 @@  static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
             cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with "
                       "no HV support\n", excp);
         }
-        if (srr0 == SPR_HSRR0) {
-            cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with "
-                      "no HV support\n", excp);
-        }
     }
 
     /*
@@ -724,10 +715,10 @@  static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
     }
 
     /* Save PC */
-    env->spr[srr0] = env->nip;
+    env->spr[SPR_SRR0] = env->nip;
 
     /* Save MSR */
-    env->spr[srr1] = msr;
+    env->spr[SPR_SRR1] = msr;
 
     powerpc_set_excp_state(cpu, vector, new_msr);
 }