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[PULL 055/101] target/ppc: Disable unused facilities in the e600 CPU
From: |
Cédric Le Goater |
Subject: |
[PULL 055/101] target/ppc: Disable unused facilities in the e600 CPU |
Date: |
Thu, 16 Dec 2021 21:25:28 +0100 |
From: Fabiano Rosas <farosas@linux.ibm.com>
The e600 CPU is a successor of the 7448 and like all the 7450s CPUs,
it has an optional software TLB feature.
We have determined that there is no OS software support for the 7450
software TLB available these days. See the previous commit for more
information.
This patch disables the SPRs and instructions related to software TLB
from the e600 CPU.
No functional change intended. These facilities should be used by the
OS in interrupt handlers for interrupts that QEMU never generates.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20211130230123.781844-3-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
target/ppc/cpu_init.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c
index 509df35d0907..962acf295fd1 100644
--- a/target/ppc/cpu_init.c
+++ b/target/ppc/cpu_init.c
@@ -2537,9 +2537,6 @@ static void init_excp_7450(CPUPPCState *env)
env->excp_vectors[POWERPC_EXCP_TRACE] = 0x00000D00;
env->excp_vectors[POWERPC_EXCP_PERFM] = 0x00000F00;
env->excp_vectors[POWERPC_EXCP_VPU] = 0x00000F20;
- env->excp_vectors[POWERPC_EXCP_IFTLB] = 0x00001000;
- env->excp_vectors[POWERPC_EXCP_DLTLB] = 0x00001100;
- env->excp_vectors[POWERPC_EXCP_DSTLB] = 0x00001200;
env->excp_vectors[POWERPC_EXCP_IABR] = 0x00001300;
env->excp_vectors[POWERPC_EXCP_SMI] = 0x00001400;
env->excp_vectors[POWERPC_EXCP_VPUA] = 0x00001600;
@@ -6643,7 +6640,6 @@ static void init_proc_e600(CPUPPCState *env)
/* Memory management */
register_low_BATs(env);
register_high_BATs(env);
- register_74xx_soft_tlb(env, 128, 2);
init_excp_7450(env);
env->dcache_line_size = 32;
env->icache_line_size = 32;
@@ -6667,7 +6663,7 @@ POWERPC_FAMILY(e600)(ObjectClass *oc, void *data)
PPC_CACHE_DCBA | PPC_CACHE_DCBZ |
PPC_MEM_SYNC | PPC_MEM_EIEIO |
PPC_MEM_TLBIE | PPC_MEM_TLBSYNC |
- PPC_MEM_TLBIA | PPC_74xx_TLB |
+ PPC_MEM_TLBIA |
PPC_SEGMENT | PPC_EXTERN |
PPC_ALTIVEC;
pcc->insns_flags2 = PPC_NONE;
--
2.31.1
- [PULL 065/101] ppc/ppc405: Drop flag parameter in ppc405_set_bootinfo(), (continued)
- [PULL 065/101] ppc/ppc405: Drop flag parameter in ppc405_set_bootinfo(), Cédric Le Goater, 2021/12/16
- [PULL 032/101] target/ppc: Fix VXCVI return value, Cédric Le Goater, 2021/12/16
- [PULL 041/101] target/ppc: Update do_frsp for new flags, Cédric Le Goater, 2021/12/16
- [PULL 067/101] ppc/ppc405: Add some address space definitions, Cédric Le Goater, 2021/12/16
- [PULL 047/101] target/ppc: Add helpers for fmadds et al, Cédric Le Goater, 2021/12/16
- [PULL 034/101] target/ppc: Use FloatRoundMode in do_fri, Cédric Le Goater, 2021/12/16
- [PULL 044/101] target/ppc: Update xsrqpi and xsrqpxp to new flags, Cédric Le Goater, 2021/12/16
- [PULL 045/101] target/ppc: Update fre to new flags, Cédric Le Goater, 2021/12/16
- [PULL 050/101] target/ppc: Add helper for fmuls, Cédric Le Goater, 2021/12/16
- [PULL 054/101] target/ppc: Disable software TLB for the 7450 family, Cédric Le Goater, 2021/12/16
- [PULL 055/101] target/ppc: Disable unused facilities in the e600 CPU,
Cédric Le Goater <=
- [PULL 061/101] ppc/ppc405: Change kernel load address, Cédric Le Goater, 2021/12/16
- [PULL 053/101] target/ppc: Use helper_todouble/tosingle in helper_xststdcsp, Cédric Le Goater, 2021/12/16
- [PULL 064/101] ppc/ppc405: Convert printfs to trace-events, Cédric Le Goater, 2021/12/16
- [PULL 062/101] ppc: Mark the 'taihu' machine as deprecated, Cédric Le Goater, 2021/12/16
- [PULL 068/101] ppc/ppc405: Remove flash support, Cédric Le Goater, 2021/12/16
- [PULL 058/101] target/ppc: Remove 603e exception model, Cédric Le Goater, 2021/12/16
- [PULL 077/101] target/ppc: fix xscvqpdp register access, Cédric Le Goater, 2021/12/16
- [PULL 059/101] target/ppc: Set 601v exception model id, Cédric Le Goater, 2021/12/16
- [PULL 080/101] Revert "target/ppc: Move SPR_DSISR setting to powerpc_excp", Cédric Le Goater, 2021/12/16
- [PULL 066/101] ppc/ppc405: Change ppc405ep_init() return value, Cédric Le Goater, 2021/12/16