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[POWERPC] Reworking machine check handling and Fix 440/440A 

This adds a cputable function pointer for the CPU-side machine
check handling. The semantic is still the same as the old one,
the one in ppc_md. overrides the one in cputable, though
ultimately we'll want to change that so the CPU gets first.

This removes CONFIG_440A which was a problem for multiplatform
kernels and instead fixes up the IVOR at runtime from a setup_cpu
function. The "A" version of the machine check also tweaks the
regs->trap value to differenciate the 2 versions at the C level.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Benjamin Herrenschmidt 2007-12-21 15:39:21 +11:00 committed by Josh Boyer
parent c2a7dcad9f
commit 47c0bd1ae2
11 changed files with 258 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/powerpc/kernel/cpu_setup_44x.S
View File

@ -23,11 +23,20 @@ _GLOBAL(__setup_cpu_440epx)
mflr r4
bl __init_fpu_44x
bl __plb_disable_wrp
bl __fixup_440A_mcheck
mtlr r4
blr
_GLOBAL(__setup_cpu_440grx)
b __plb_disable_wrp
_GLOBAL(__setup_cpu_440gx)
_GLOBAL(__setup_cpu_440spe)
b __fixup_440A_mcheck
/* Temporary fixup for arch/ppc until we kill the whole thing */
#ifndef CONFIG_PPC_MERGE
_GLOBAL(__fixup_440A_mcheck)
blr
#endif
/* enable APU between CPU and FPU */
_GLOBAL(__init_fpu_44x)

105
arch/powerpc/kernel/cputable.c
View File

@ -33,7 +33,9 @@ EXPORT_SYMBOL(cur_cpu_spec);
#ifdef CONFIG_PPC32
extern void __setup_cpu_440ep(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_440gx(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_440grx(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_440spe(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@ -85,6 +87,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power3",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "power3",
},
{ /* Power3+ */
@ -99,6 +102,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power3",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "power3",
},
{ /* Northstar */
@ -113,6 +117,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "rs64",
},
{ /* Pulsar */
@ -127,6 +132,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "rs64",
},
{ /* I-star */
@ -141,6 +147,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "rs64",
},
{ /* S-star */
@ -155,6 +162,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/rs64",
.oprofile_type = PPC_OPROFILE_RS64,
.machine_check = machine_check_generic,
.platform = "rs64",
},
{ /* Power4 */
@ -169,6 +177,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power4",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "power4",
},
{ /* Power4+ */
@ -183,6 +192,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/power4",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "power4",
},
{ /* PPC970 */
@ -200,6 +210,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "ppc970",
},
{ /* PPC970FX */
@ -217,6 +228,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "ppc970",
},
{ /* PPC970MP DD1.0 - no DEEPNAP, use regular 970 init */
@ -234,6 +246,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970MP",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "ppc970",
},
{ /* PPC970MP */
@ -251,6 +264,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_restore = __restore_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970MP",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "ppc970",
},
{ /* PPC970GX */
@ -267,6 +281,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_ppc970,
.oprofile_cpu_type = "ppc64/970",
.oprofile_type = PPC_OPROFILE_POWER4,
.machine_check = machine_check_generic,
.platform = "ppc970",
},
{ /* Power5 GR */
@ -286,6 +301,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
*/
.oprofile_mmcra_sihv = MMCRA_SIHV,
.oprofile_mmcra_sipr = MMCRA_SIPR,
.machine_check = machine_check_generic,
.platform = "power5",
},
{ /* Power5++ */
@ -301,6 +317,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.oprofile_type = PPC_OPROFILE_POWER4,
.oprofile_mmcra_sihv = MMCRA_SIHV,
.oprofile_mmcra_sipr = MMCRA_SIPR,
.machine_check = machine_check_generic,
.platform = "power5+",
},
{ /* Power5 GS */
@ -317,6 +334,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.oprofile_type = PPC_OPROFILE_POWER4,
.oprofile_mmcra_sihv = MMCRA_SIHV,
.oprofile_mmcra_sipr = MMCRA_SIPR,
.machine_check = machine_check_generic,
.platform = "power5+",
},
{ /* POWER6 in P5+ mode; 2.04-compliant processor */
@ -327,6 +345,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_POWER5_PLUS,
.icache_bsize = 128,
.dcache_bsize = 128,
.machine_check = machine_check_generic,
.platform = "power5+",
},
{ /* Power6 */
@ -346,6 +365,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.oprofile_mmcra_sipr = POWER6_MMCRA_SIPR,
.oprofile_mmcra_clear = POWER6_MMCRA_THRM |
POWER6_MMCRA_OTHER,
.machine_check = machine_check_generic,
.platform = "power6x",
},
{ /* 2.05-compliant processor, i.e. Power6 "architected" mode */
@ -356,6 +376,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_POWER6,
.icache_bsize = 128,
.dcache_bsize = 128,
.machine_check = machine_check_generic,
.platform = "power6",
},
{ /* Cell Broadband Engine */
@ -372,6 +393,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.pmc_type = PPC_PMC_IBM,
.oprofile_cpu_type = "ppc64/cell-be",
.oprofile_type = PPC_OPROFILE_CELL,
.machine_check = machine_check_generic,
.platform = "ppc-cell-be",
},
{ /* PA Semi PA6T */
@ -388,6 +410,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_restore = __restore_cpu_pa6t,
.oprofile_cpu_type = "ppc64/pa6t",
.oprofile_type = PPC_OPROFILE_PA6T,
.machine_check = machine_check_generic,
.platform = "pa6t",
},
{ /* default match */
@ -400,6 +423,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 128,
.num_pmcs = 6,
.pmc_type = PPC_PMC_IBM,
.machine_check = machine_check_generic,
.platform = "power4",
}
#endif /* CONFIG_PPC64 */
@ -414,6 +438,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_UNIFIED_CACHE | PPC_FEATURE_NO_TB,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_generic,
.platform = "ppc601",
},
{ /* 603 */
@ -425,6 +450,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* 603e */
@ -436,6 +462,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* 603ev */
@ -447,6 +474,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* 604 */
@ -459,6 +487,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 2,
.cpu_setup = __setup_cpu_604,
.machine_check = machine_check_generic,
.platform = "ppc604",
},
{ /* 604e */
@ -471,6 +500,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_604,
.machine_check = machine_check_generic,
.platform = "ppc604",
},
{ /* 604r */
@ -483,6 +513,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_604,
.machine_check = machine_check_generic,
.platform = "ppc604",
},
{ /* 604ev */
@ -495,6 +526,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_604,
.machine_check = machine_check_generic,
.platform = "ppc604",
},
{ /* 740/750 (0x4202, don't support TAU ?) */
@ -507,6 +539,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750CX (80100 and 8010x?) */
@ -519,6 +552,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750CX (82201 and 82202) */
@ -531,6 +565,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750CXe (82214) */
@ -543,6 +578,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750CXe "Gekko" (83214) */
@ -555,6 +591,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750cx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750CL */
@ -567,6 +604,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 745/755 */
@ -579,6 +617,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750FX rev 1.x */
@ -591,6 +630,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750FX rev 2.0 must disable HID0[DPM] */
@ -603,6 +643,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750FX (All revs except 2.0) */
@ -615,6 +656,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750fx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 750GX */
@ -627,6 +669,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750fx,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 740/750 (L2CR bit need fixup for 740) */
@ -639,6 +682,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_750,
.machine_check = machine_check_generic,
.platform = "ppc750",
},
{ /* 7400 rev 1.1 ? (no TAU) */
@ -652,6 +696,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_7400,
.machine_check = machine_check_generic,
.platform = "ppc7400",
},
{ /* 7400 */
@ -665,6 +710,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_7400,
.machine_check = machine_check_generic,
.platform = "ppc7400",
},
{ /* 7410 */
@ -678,6 +724,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.dcache_bsize = 32,
.num_pmcs = 4,
.cpu_setup = __setup_cpu_7410,
.machine_check = machine_check_generic,
.platform = "ppc7400",
},
{ /* 7450 2.0 - no doze/nap */
@ -693,6 +740,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7450 2.1 */
@ -708,6 +756,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7450 2.3 and newer */
@ -723,6 +772,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7455 rev 1.x */
@ -738,6 +788,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7455 rev 2.0 */
@ -753,6 +804,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7455 others */
@ -768,6 +820,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7447/7457 Rev 1.0 */
@ -783,6 +836,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7447/7457 Rev 1.1 */
@ -798,6 +852,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7447/7457 Rev 1.2 and later */
@ -812,6 +867,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7447A */
@ -827,6 +883,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 7448 */
@ -842,6 +899,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_setup = __setup_cpu_745x,
.oprofile_cpu_type = "ppc/7450",
.oprofile_type = PPC_OPROFILE_G4,
.machine_check = machine_check_generic,
.platform = "ppc7450",
},
{ /* 82xx (8240, 8245, 8260 are all 603e cores) */
@ -853,6 +911,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* All G2_LE (603e core, plus some) have the same pvr */
@ -864,6 +923,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* e300c1 (a 603e core, plus some) on 83xx */
@ -875,6 +935,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* e300c2 (an e300c1 core, plus some, minus FPU) on 83xx */
@ -886,6 +947,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* e300c3 (e300c1, plus one IU, half cache size) on 83xx */
@ -908,6 +970,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_603,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
{ /* default match, we assume split I/D cache & TB (non-601)... */
@ -918,6 +981,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_generic,
.platform = "ppc603",
},
#endif /* CLASSIC_PPC */
@ -944,6 +1008,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
.icache_bsize = 16,
.dcache_bsize = 16,
.machine_check = machine_check_4xx,
.platform = "ppc403",
},
{ /* 403GCX */
@ -955,6 +1020,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_NO_TB,
.icache_bsize = 16,
.dcache_bsize = 16,
.machine_check = machine_check_4xx,
.platform = "ppc403",
},
{ /* 403G ?? */
@ -965,6 +1031,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
.icache_bsize = 16,
.dcache_bsize = 16,
.machine_check = machine_check_4xx,
.platform = "ppc403",
},
{ /* 405GP */
@ -976,6 +1043,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* STB 03xxx */
@ -987,6 +1055,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* STB 04xxx */
@ -998,6 +1067,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* NP405L */
@ -1009,6 +1079,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* NP4GS3 */
@ -1020,6 +1091,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* NP405H */
@ -1031,6 +1103,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* 405GPr */
@ -1042,6 +1115,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* STBx25xx */
@ -1053,6 +1127,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* 405LP */
@ -1063,6 +1138,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = PPC_FEATURE_32 | PPC_FEATURE_HAS_MMU,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* Xilinx Virtex-II Pro */
@ -1074,6 +1150,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* Xilinx Virtex-4 FX */
@ -1085,6 +1162,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* 405EP */
@ -1096,6 +1174,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
{ /* 405EX */
@ -1107,6 +1186,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_MMU | PPC_FEATURE_HAS_4xxMAC,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc405",
},
@ -1120,6 +1200,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{ /* Use logical PVR for 440EP (logical pvr = pvr | 0x8) */
@ -1131,6 +1212,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440ep,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{
@ -1141,6 +1223,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE | PPC_FEATURE_HAS_FPU,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{ /* Use logical PVR for 440EP (logical pvr = pvr | 0x8) */
@ -1152,6 +1235,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440ep,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{ /* 440GRX */
@ -1163,6 +1247,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440grx,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{ /* Use logical PVR for 440EPx (logical pvr = pvr | 0x8) */
@ -1174,6 +1259,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440epx,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440GP Rev. B */
@ -1184,6 +1270,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc440gp",
},
{ /* 440GP Rev. C */
@ -1194,6 +1281,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc440gp",
},
{ /* 440GX Rev. A */
@ -1204,6 +1292,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440gx,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440GX Rev. B */
@ -1214,6 +1304,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440gx,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440GX Rev. C */
@ -1224,6 +1316,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440gx,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440GX Rev. F */
@ -1234,6 +1328,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440gx,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440SP Rev. A */
@ -1244,6 +1340,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.machine_check = machine_check_4xx,
.platform = "ppc440",
},
{ /* 440SPe Rev. A */
@ -1254,6 +1351,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440spe,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
{ /* 440SPe Rev. B */
@ -1264,6 +1363,8 @@ static struct cpu_spec __initdata cpu_specs[] = {
.cpu_user_features = COMMON_USER_BOOKE,
.icache_bsize = 32,
.dcache_bsize = 32,
.cpu_setup = __setup_cpu_440spe,
.machine_check = machine_check_440A,
.platform = "ppc440",
},
#endif /* CONFIG_44x */
@ -1278,6 +1379,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_EFP_SINGLE |
PPC_FEATURE_UNIFIED_CACHE,
.dcache_bsize = 32,
.machine_check = machine_check_e200,
.platform = "ppc5554",
},
{ /* e200z6 */
@ -1291,6 +1393,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
PPC_FEATURE_HAS_EFP_SINGLE_COMP |
PPC_FEATURE_UNIFIED_CACHE,
.dcache_bsize = 32,
.machine_check = machine_check_e200,
.platform = "ppc5554",
},
{ /* e500 */
@ -1307,6 +1410,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.num_pmcs = 4,
.oprofile_cpu_type = "ppc/e500",
.oprofile_type = PPC_OPROFILE_BOOKE,
.machine_check = machine_check_e500,
.platform = "ppc8540",
},
{ /* e500v2 */
@ -1324,6 +1428,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
.num_pmcs = 4,
.oprofile_cpu_type = "ppc/e500",
.oprofile_type = PPC_OPROFILE_BOOKE,
.machine_check = machine_check_e500,
.platform = "ppc8548",
},
#endif

14
arch/powerpc/kernel/head_44x.S
View File

@ -289,11 +289,8 @@ interrupt_base:
CRITICAL_EXCEPTION(0x0100, CriticalInput, unknown_exception)
/* Machine Check Interrupt */
#ifdef CONFIG_440A
MCHECK_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
#else
CRITICAL_EXCEPTION(0x0200, MachineCheck, machine_check_exception)
#endif
MCHECK_EXCEPTION(0x0210, MachineCheckA, machine_check_exception)
/* Data Storage Interrupt */
START_EXCEPTION(DataStorage)
@ -673,6 +670,15 @@ finish_tlb_load:
* Global functions
*/
/*
* Adjust the machine check IVOR on 440A cores
*/
_GLOBAL(__fixup_440A_mcheck)
li r3,MachineCheckA@l
mtspr SPRN_IVOR1,r3
sync
blr
/*
* extern void giveup_altivec(struct task_struct *prev)
*

2
arch/powerpc/kernel/head_booke.h
View File

@ -166,7 +166,7 @@ label:
mfspr r5,SPRN_ESR; \
stw r5,_ESR(r11); \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(hdlr, n+2, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
EXC_XFER_TEMPLATE(hdlr, n+4, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), \
NOCOPY, mcheck_transfer_to_handler, \
ret_from_mcheck_exc)

62
arch/powerpc/kernel/traps.c
View File

@ -334,18 +334,25 @@ static inline int check_io_access(struct pt_regs *regs)
#define clear_single_step(regs) ((regs)->msr &= ~MSR_SE)
#endif
static int generic_machine_check_exception(struct pt_regs *regs)
#if defined(CONFIG_4xx)
int machine_check_4xx(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
#if defined(CONFIG_4xx) && !defined(CONFIG_440A)
if (reason & ESR_IMCP) {
printk("Instruction");
mtspr(SPRN_ESR, reason & ~ESR_IMCP);
} else
printk("Data");
printk(" machine check in kernel mode.\n");
#elif defined(CONFIG_440A)
return 0;
}
int machine_check_440A(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
if (reason & ESR_IMCP){
printk("Instruction Synchronous Machine Check exception\n");
@ -375,7 +382,13 @@ static int generic_machine_check_exception(struct pt_regs *regs)
/* Clear MCSR */
mtspr(SPRN_MCSR, mcsr);
}
#elif defined (CONFIG_E500)
return 0;
}
#elif defined(CONFIG_E500)
int machine_check_e500(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
@ -403,7 +416,14 @@ static int generic_machine_check_exception(struct pt_regs *regs)
printk("Bus - Instruction Parity Error\n");
if (reason & MCSR_BUS_RPERR)
printk("Bus - Read Parity Error\n");
#elif defined (CONFIG_E200)
return 0;
}
#elif defined(CONFIG_E200)
int machine_check_e200(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
@ -421,7 +441,14 @@ static int generic_machine_check_exception(struct pt_regs *regs)
printk("Bus - Read Bus Error on data load\n");
if (reason & MCSR_BUS_WRERR)
printk("Bus - Write Bus Error on buffered store or cache line push\n");
#else /* !CONFIG_4xx && !CONFIG_E500 && !CONFIG_E200 */
return 0;
}
#else
int machine_check_generic(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from SRR1=%lx): ", reason);
switch (reason & 0x601F0000) {
@ -451,22 +478,26 @@ static int generic_machine_check_exception(struct pt_regs *regs)
default:
printk("Unknown values in msr\n");
}
#endif /* CONFIG_4xx */
return 0;
}
#endif /* everything else */
void machine_check_exception(struct pt_regs *regs)
{
int recover = 0;
/* See if any machine dependent calls */
/* See if any machine dependent calls. In theory, we would want
* to call the CPU first, and call the ppc_md. one if the CPU
* one returns a positive number. However there is existing code
* that assumes the board gets a first chance, so let's keep it
* that way for now and fix things later. --BenH.
*/
if (ppc_md.machine_check_exception)
recover = ppc_md.machine_check_exception(regs);
else
recover = generic_machine_check_exception(regs);
else if (cur_cpu_spec->machine_check)
recover = cur_cpu_spec->machine_check(regs);
if (recover)
if (recover > 0)
return;
if (user_mode(regs)) {
@ -476,7 +507,12 @@ void machine_check_exception(struct pt_regs *regs)
}
#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
/* the qspan pci read routines can cause machine checks -- Cort */
/* the qspan pci read routines can cause machine checks -- Cort
*
* yuck !!! that totally needs to go away ! There are better ways
* to deal with that than having a wart in the mcheck handler.
* -- BenH
*/
bad_page_fault(regs, regs->dar, SIGBUS);
return;
#endif

5
arch/powerpc/platforms/44x/Kconfig
View File

@ -62,11 +62,6 @@ config 440GX
config 440SP
bool
config 440A
bool
depends on 440GX || 440EPX
default y
# 44x errata/workaround config symbols, selected by the CPU models above
config IBM440EP_ERR42
bool

98
arch/ppc/kernel/traps.c
View File

@ -231,39 +231,25 @@ platform_machine_check(struct pt_regs *regs)
{
}
void machine_check_exception(struct pt_regs *regs)
#if defined(CONFIG_4xx)
int machine_check_4xx(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
if (user_mode(regs)) {
regs->msr |= MSR_RI;
_exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
return;
}
#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
/* the qspan pci read routines can cause machine checks -- Cort */
bad_page_fault(regs, regs->dar, SIGBUS);
return;
#endif
if (debugger_fault_handler) {
debugger_fault_handler(regs);
regs->msr |= MSR_RI;
return;
}
if (check_io_access(regs))
return;
#if defined(CONFIG_4xx) && !defined(CONFIG_440A)
if (reason & ESR_IMCP) {
printk("Instruction");
mtspr(SPRN_ESR, reason & ~ESR_IMCP);
} else
printk("Data");
printk(" machine check in kernel mode.\n");
#elif defined(CONFIG_440A)
return 0;
}
int machine_check_440A(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
if (reason & ESR_IMCP){
printk("Instruction Synchronous Machine Check exception\n");
@ -293,7 +279,13 @@ void machine_check_exception(struct pt_regs *regs)
/* Clear MCSR */
mtspr(SPRN_MCSR, mcsr);
}
#elif defined (CONFIG_E500)
return 0;
}
#elif defined(CONFIG_E500)
int machine_check_e500(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
@ -305,8 +297,6 @@ void machine_check_exception(struct pt_regs *regs)
printk("Data Cache Push Parity Error\n");
if (reason & MCSR_DCPERR)
printk("Data Cache Parity Error\n");
if (reason & MCSR_GL_CI)
printk("Guarded Load or Cache-Inhibited stwcx.\n");
if (reason & MCSR_BUS_IAERR)
printk("Bus - Instruction Address Error\n");
if (reason & MCSR_BUS_RAERR)
@ -318,12 +308,19 @@ void machine_check_exception(struct pt_regs *regs)
if (reason & MCSR_BUS_RBERR)
printk("Bus - Read Data Bus Error\n");
if (reason & MCSR_BUS_WBERR)
printk("Bus - Write Data Bus Error\n");
printk("Bus - Read Data Bus Error\n");
if (reason & MCSR_BUS_IPERR)
printk("Bus - Instruction Parity Error\n");
if (reason & MCSR_BUS_RPERR)
printk("Bus - Read Parity Error\n");
#elif defined (CONFIG_E200)
return 0;
}
#elif defined(CONFIG_E200)
int machine_check_e200(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from MCSR=%lx): ", reason);
@ -341,7 +338,14 @@ void machine_check_exception(struct pt_regs *regs)
printk("Bus - Read Bus Error on data load\n");
if (reason & MCSR_BUS_WRERR)
printk("Bus - Write Bus Error on buffered store or cache line push\n");
#else /* !CONFIG_4xx && !CONFIG_E500 && !CONFIG_E200 */
return 0;
}
#else
int machine_check_generic(struct pt_regs *regs)
{
unsigned long reason = get_mc_reason(regs);
printk("Machine check in kernel mode.\n");
printk("Caused by (from SRR1=%lx): ", reason);
switch (reason & 0x601F0000) {
@ -371,7 +375,39 @@ void machine_check_exception(struct pt_regs *regs)
default:
printk("Unknown values in msr\n");
}
#endif /* CONFIG_4xx */
return 0;
}
#endif /* everything else */
void machine_check_exception(struct pt_regs *regs)
{
int recover = 0;
if (cur_cpu_spec->machine_check)
recover = cur_cpu_spec->machine_check(regs);
if (recover > 0)
return;
if (user_mode(regs)) {
regs->msr |= MSR_RI;
_exception(SIGBUS, regs, BUS_ADRERR, regs->nip);
return;
}
#if defined(CONFIG_8xx) && defined(CONFIG_PCI)
/* the qspan pci read routines can cause machine checks -- Cort */
bad_page_fault(regs, regs->dar, SIGBUS);
return;
#endif
if (debugger_fault_handler) {
debugger_fault_handler(regs);
regs->msr |= MSR_RI;
return;
}
if (check_io_access(regs))
return;
/*
* Optional platform-provided routine to print out

13
include/asm-powerpc/cputable.h
View File

@ -57,6 +57,14 @@ enum powerpc_pmc_type {
PPC_PMC_PA6T = 2,
};
struct pt_regs;
extern int machine_check_generic(struct pt_regs *regs);
extern int machine_check_4xx(struct pt_regs *regs);
extern int machine_check_440A(struct pt_regs *regs);
extern int machine_check_e500(struct pt_regs *regs);
extern int machine_check_e200(struct pt_regs *regs);
/* NOTE WELL: Update identify_cpu() if fields are added or removed! */
struct cpu_spec {
/* CPU is matched via (PVR & pvr_mask) == pvr_value */
@ -97,6 +105,11 @@ struct cpu_spec {
/* Name of processor class, for the ELF AT_PLATFORM entry */
char *platform;
/* Processor specific machine check handling. Return negative
* if the error is fatal, 1 if it was fully recovered and 0 to
* pass up (not CPU originated) */
int (*machine_check)(struct pt_regs *regs);
};
extern struct cpu_spec *cur_cpu_spec;

3
include/asm-powerpc/ptrace.h
View File

@ -106,7 +106,8 @@ extern int ptrace_put_reg(struct task_struct *task, int regno,
*/
#define FULL_REGS(regs) (((regs)->trap & 1) == 0)
#ifndef __powerpc64__
#define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) == 0)
#define IS_CRITICAL_EXC(regs) (((regs)->trap & 2) != 0)
#define IS_MCHECK_EXC(regs) (((regs)->trap & 4) != 0)
#endif /* ! __powerpc64__ */
#define TRAP(regs) ((regs)->trap & ~0xF)
#ifdef __powerpc64__

3
include/asm-powerpc/reg_booke.h
View File

@ -218,7 +218,6 @@
#define CCR1_TCS 0x00000080 /* Timer Clock Select */
/* Bit definitions for the MCSR. */
#ifdef CONFIG_440A
#define MCSR_MCS 0x80000000 /* Machine Check Summary */
#define MCSR_IB 0x40000000 /* Instruction PLB Error */
#define MCSR_DRB 0x20000000 /* Data Read PLB Error */
@ -228,7 +227,7 @@
#define MCSR_DCSP 0x02000000 /* D-Cache Search Parity Error */
#define MCSR_DCFP 0x01000000 /* D-Cache Flush Parity Error */
#define MCSR_IMPE 0x00800000 /* Imprecise Machine Check Exception */
#endif
#ifdef CONFIG_E500
#define MCSR_MCP 0x80000000UL /* Machine Check Input Pin */
#define MCSR_ICPERR 0x40000000UL /* I-Cache Parity Error */

2
include/asm-ppc/reg_booke.h
View File

@ -207,7 +207,7 @@
#define CCR1_TCS 0x00000080 /* Timer Clock Select */
/* Bit definitions for the MCSR. */
#ifdef CONFIG_440A
#ifdef CONFIG_4xx
#define MCSR_MCS 0x80000000 /* Machine Check Summary */
#define MCSR_IB 0x40000000 /* Instruction PLB Error */
#define MCSR_DRB 0x20000000 /* Data Read PLB Error */