diff options
Diffstat (limited to 'i386/i386/mp_desc.c')
-rw-r--r-- | i386/i386/mp_desc.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/i386/i386/mp_desc.c b/i386/i386/mp_desc.c index 3bb207b1..e9834111 100644 --- a/i386/i386/mp_desc.c +++ b/i386/i386/mp_desc.c @@ -367,6 +367,34 @@ cpu_setup() return 0; } +void paging_setup(){ + +#if PAE + set_cr3(pdpbase_addr); +#ifndef MACH_HYP + if (!CPU_HAS_FEATURE(CPU_FEATURE_PAE)) + set_cr4(get_cr4() | CR4_PAE); +#endif /* MACH_HYP */ +#else + set_cr3(kernel_page_dir_addr); +#endif /* PAE */ +#ifndef MACH_HYP + /* Turn paging on. + * Also set the WP bit so that on 486 or better processors + * page-level write protection works in kernel mode. + */ + set_cr0(get_cr0() | CR0_PG | CR0_WP); + set_cr0(get_cr0() & ~(CR0_CD | CR0_NW)); + + if (CPU_HAS_FEATURE(CPU_FEATURE_PGE)) + set_cr4(get_cr4() | CR4_PGE); + +#endif /* MACH_HYP */ + + flush_instr_queue(); + flush_tlb(); + +} int cpu_ap_main() |