target/ppc: Remove PowerPC 601 CPUs

The PowerPC 601 processor is the first generation of processors to
implement the PowerPC architecture. It was designed as a bridge
processor and also could execute most of the instructions of the
previous POWER architecture. It was found on the first Macs and IBM
RS/6000 workstations.

There is not much interest in keeping the CPU model of this
POWER-PowerPC bridge processor. We have the 603 and 604 CPU models of
the 60x family which implement the complete PowerPC instruction set.

Cc: "Hervé Poussineau" <hpoussin@reactos.org>
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220203142756.1302515-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 0 insertions, 21 deletions

diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index 6512ee031c..e9c5b14c0f 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -441,29 +441,9 @@ static int get_segment_6xx_tlb(CPUPPCState *env, mmu_ctx_t *ctx,
             ret = -3;
         }
     } else {
-        target_ulong sr;
-
         qemu_log_mask(CPU_LOG_MMU, "direct store...\n");
         /* Direct-store segment : absolutely *BUGGY* for now */
 
-        /*
-         * Direct-store implies a 32-bit MMU.
-         * Check the Segment Register's bus unit ID (BUID).
-         */
-        sr = env->sr[eaddr >> 28];
-        if ((sr & 0x1FF00000) >> 20 == 0x07f) {
-            /*
-             * Memory-forced I/O controller interface access
-             *
-             * If T=1 and BUID=x'07F', the 601 performs a memory
-             * access to SR[28-31] LA[4-31], bypassing all protection
-             * mechanisms.
-             */
-            ctx->raddr = ((sr & 0xF) << 28) | (eaddr & 0x0FFFFFFF);
-            ctx->prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
-            return 0;
-        }
-
         switch (type) {
         case ACCESS_INT:
             /* Integer load/store : only access allowed */
@@ -1539,7 +1519,6 @@ bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
 #endif
 
     case POWERPC_MMU_32B:
-    case POWERPC_MMU_601:
         return ppc_hash32_xlate(cpu, eaddr, access_type, raddrp,
                                psizep, protp, mmu_idx, guest_visible);