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No longer call init_mtrrs() if there are no MTRRs, also made generic_init_mtrrs()

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no longer try to access any MSRs when there are no MTRRs. Got it? :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17574 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2006-05-24 10:18:49 +00:00
parent 373e124fd8
commit 1283fc6e42
2 changed files with 6 additions and 5 deletions
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src/add-ons/kernel/cpu/x86/generic_x86.cpp
+3
View File
@@ -60,6 +60,9 @@ generic_count_mtrrs(void)
void void
generic_init_mtrrs(uint32 count) generic_init_mtrrs(uint32 count)
{ {
if (count == 0)
return;
// disable and clear all MTRRs // disable and clear all MTRRs
// (we leave the fixed MTRRs as is) // (we leave the fixed MTRRs as is)
// TODO: check if the fixed MTRRs are set on all CPUs identically? // TODO: check if the fixed MTRRs are set on all CPUs identically?
src/system/kernel/arch/x86/arch_cpu.c
+3 -5
View File
@@ -358,11 +358,9 @@ arch_cpu_init_post_modules(kernel_args *args)
close_module_list(cookie); close_module_list(cookie);
if (sCpuModule == NULL) // initialize MTRRs if available
return B_OK; if (x86_count_mtrrs > 0)
call_all_cpus(&init_mtrrs, NULL);
// initialize MTRRs
call_all_cpus(&init_mtrrs, NULL);
return B_OK; return B_OK;
} }