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[PULL 055/102] target/ppc: Disable unused facilities in the e600 CPU
From: |
Cédric Le Goater |
Subject: |
[PULL 055/102] target/ppc: Disable unused facilities in the e600 CPU |
Date: |
Wed, 15 Dec 2021 18:03:10 +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 048/102] target/ppc: Add helper for fsqrts, (continued)
- [PULL 048/102] target/ppc: Add helper for fsqrts, Cédric Le Goater, 2021/12/15
- [PULL 047/102] target/ppc: Add helpers for fmadds et al, Cédric Le Goater, 2021/12/15
- [PULL 033/102] target/ppc: Remove inline from do_fri, Cédric Le Goater, 2021/12/15
- [PULL 053/102] target/ppc: Use helper_todouble/tosingle in helper_xststdcsp, Cédric Le Goater, 2021/12/15
- [PULL 052/102] target/ppc: Update fres to new flags and float64r32, Cédric Le Goater, 2021/12/15
- [PULL 051/102] target/ppc: Add helper for frsqrtes, Cédric Le Goater, 2021/12/15
- [PULL 042/102] target/ppc: Use helper_todouble in do_frsp, Cédric Le Goater, 2021/12/15
- [PULL 049/102] target/ppc: Add helpers for fadds, fsubs, fdivs, Cédric Le Goater, 2021/12/15
- [PULL 054/102] target/ppc: Disable software TLB for the 7450 family, Cédric Le Goater, 2021/12/15
- [PULL 060/102] target/ppc: remove 401/403 CPUs, Cédric Le Goater, 2021/12/15
- [PULL 055/102] target/ppc: Disable unused facilities in the e600 CPU,
Cédric Le Goater <=
- [PULL 046/102] softfloat: Add float64r32 arithmetic routines, Cédric Le Goater, 2021/12/15
- [PULL 062/102] ppc: Mark the 'taihu' machine as deprecated, Cédric Le Goater, 2021/12/15
- [PULL 066/102] ppc/ppc405: Change ppc405ep_init() return value, Cédric Le Goater, 2021/12/15
- [PULL 058/102] target/ppc: Remove 603e exception model, Cédric Le Goater, 2021/12/15
- [PULL 056/102] target/ppc: Remove the software TLB model of 7450 CPUs, Cédric Le Goater, 2021/12/15
- [PULL 063/102] ppc: Add trace-events for DCR accesses, Cédric Le Goater, 2021/12/15
- [PULL 064/102] ppc/ppc405: Convert printfs to trace-events, Cédric Le Goater, 2021/12/15
- [PULL 043/102] target/ppc: Update sqrt for new flags, Cédric Le Goater, 2021/12/15
- [PULL 045/102] target/ppc: Update fre to new flags, Cédric Le Goater, 2021/12/15
- [PULL 057/102] target/ppc: Fix MPCxxx FPU interrupt address, Cédric Le Goater, 2021/12/15