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PPC: Ignore writes to L2CR

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The L2CR register contains a number of bits that either impose configuration
which we can't deal with or mean "something is in progress until the bit is
0 again".

Since we don't model the former and we do want to accomodate guests using the
latter semantics, let's just ignore writes to L2CR. That way guests always read
back 0 and are usually happy with that.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2013-06-27 00:31:42 +02:00
parent 0d54a5024f
commit 2345f1c014
1 changed files with 11 additions and 11 deletions
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22
target-ppc/translate_init.c
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@ -1381,7 +1381,7 @@ static void gen_spr_74xx (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Not strictly an SPR */
vscr_init(env, 0x00010000);
@ -5169,7 +5169,7 @@ static void init_proc_750 (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Time base */
gen_tbl(env);
@ -5232,7 +5232,7 @@ static void init_proc_750cl (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Time base */
gen_tbl(env);
@ -5418,7 +5418,7 @@ static void init_proc_750cx (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Time base */
gen_tbl(env);
@ -5485,7 +5485,7 @@ static void init_proc_750fx (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Time base */
gen_tbl(env);
@ -5557,7 +5557,7 @@ static void init_proc_750gx (CPUPPCState *env)
/* XXX : not implemented (XXX: different from 750fx) */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Time base */
gen_tbl(env);
@ -5693,7 +5693,7 @@ static void init_proc_755 (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* XXX : not implemented */
spr_register(env, SPR_L2PMCR, "L2PMCR",
@ -6524,7 +6524,7 @@ static void init_proc_970 (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Memory management */
/* XXX: not correct */
@ -6624,7 +6624,7 @@ static void init_proc_970FX (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Memory management */
/* XXX: not correct */
@ -6736,7 +6736,7 @@ static void init_proc_970GX (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Memory management */
/* XXX: not correct */
@ -6836,7 +6836,7 @@ static void init_proc_970MP (CPUPPCState *env)
/* XXX : not implemented */
spr_register(env, SPR_L2CR, "L2CR",
SPR_NOACCESS, SPR_NOACCESS,
&spr_read_generic, &spr_write_generic,
&spr_read_generic, NULL,
0x00000000);
/* Memory management */
/* XXX: not correct */