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2007-11-29 Till Straumann <strauman@slac.stanford.edu>

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* shared/include/cpuIdent.h, shared/include/cpuIdent.c:
	Added a simple 'feature check' facility. Code should
	not check for a particular CPU type if possible but
	check the respective feature bit (e.g., 'has_altivec').
	This makes it much less cumbersome to add more CPU
	types in the future.
This commit is contained in:
Till Straumann
2007-12-01 00:06:00 +00:00
parent 9edf584f3b
commit e955b062fb
3 changed files with 100 additions and 3 deletions
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60
c/src/lib/libcpu/powerpc/shared/include/cpuIdent.c
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@@ -23,8 +23,9 @@
*/
SPR_RO(PVR)
ppc_cpu_id_t current_ppc_cpu = PPC_UNKNOWN;
ppc_cpu_id_t current_ppc_cpu = PPC_UNKNOWN;
ppc_cpu_revision_t current_ppc_revision = 0xff;
ppc_feature_t current_ppc_features = {0};
char *get_ppc_cpu_type_name(ppc_cpu_id_t cpu)
{
@@ -46,6 +47,7 @@ char *get_ppc_cpu_type_name(ppc_cpu_id_t cpu)
case PPC_860: return "MPC860";
case PPC_8260: return "MPC8260";
case PPC_8245: return "MPC8245";
case PPC_8540: return "MPC8540";
case PPC_PSIM: return "PSIM";
default:
printk("Unknown CPU value of 0x%x. Please add it to "
@@ -56,8 +58,14 @@ char *get_ppc_cpu_type_name(ppc_cpu_id_t cpu)
ppc_cpu_id_t get_ppc_cpu_type()
{
unsigned int pvr = (_read_PVR() >> 16);
unsigned int pvr;
if ( PPC_UNKNOWN != current_ppc_cpu )
return current_ppc_cpu;
pvr = (_read_PVR() >> 16);
current_ppc_cpu = (ppc_cpu_id_t) pvr;
switch (pvr) {
case PPC_405:
case PPC_601:
@@ -77,12 +85,58 @@ ppc_cpu_id_t get_ppc_cpu_type()
case PPC_8260:
case PPC_8245:
case PPC_PSIM:
return current_ppc_cpu;
case PPC_8540:
break;
default:
printk("Unknown PVR value of 0x%x. Please add it to "
"<libcpu/powerpc/shared/include/cpuIdent.c>\n", pvr );
return PPC_UNKNOWN;
}
/* determine features */
/* FIXME: This is incomplete; I couldn't go through all the
* manuals (yet).
*/
switch ( current_ppc_cpu ) {
case PPC_7455:
case PPC_7457:
current_ppc_features.has_8_bats = 1;
case PPC_7400:
current_ppc_features.has_altivec = 1;
case PPC_604:
case PPC_604e:
case PPC_604r:
case PPC_750:
current_ppc_features.has_hw_ptbl_lkup = 1;
case PPC_8260:
case PPC_8245:
case PPC_601:
case PPC_603:
case PPC_603e:
case PPC_603ev:
case PPC_603le:
current_ppc_features.is_60x = 1;
default:
break;
}
switch ( current_ppc_cpu ) {
case PPC_405:
case PPC_8540:
current_ppc_features.is_bookE = 1;
default:
break;
}
switch ( current_ppc_cpu ) {
case PPC_860:
current_ppc_features.has_16byte_clne =1;
default:
break;
}
return current_ppc_cpu;
}
ppc_cpu_revision_t get_ppc_cpu_revision()