diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | i386/i386at/model_dep.c | 8 | ||||
| -rw-r--r-- | i386/intel/pmap.c | 10 |
3 files changed, 22 insertions, 4 deletions
@@ -1,5 +1,13 @@ 2006-12-19 Samuel Thibault <samuel.thibault@ens-lyon.org> + Add support for global pages. + * i386/i386at/model_dep.c: Include <i386/locore.h>. + (i386at_init): Set CR4_PGE if available. + (c_boot_entry): Call discover_x86_cpu_type() before i386at_init(). + * i386/intel/pmap.c: Include <i386/locore.h>. + (pmap_map_bd): Use INTEL_PTE_GLOBAL if available. + (pmap_bootstrap): Likewise. + Add support for cr3/cr4 flags. * i386/i386/proc_reg.h (CR3_PCD, CR3_PWT, CR4_VME, CR4_PVI, CR4_TSD) (CR4_DE, CR4_PSE, CR4_PAE, CR4_MCE, CR4_PGE, CR4_PCE, CR4_OSFXSR) diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 9f0a1c7..9d6b030 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -50,6 +50,7 @@ #include <i386/machspl.h> #include <i386/pmap.h> #include <i386/proc_reg.h> +#include <i386/locore.h> /* Location of the kernel's symbol table. Both of these are 0 if none is available. */ @@ -264,6 +265,8 @@ i386at_init() kernel_page_dir[lin2pdenum(0)] = kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS)]; set_cr3((unsigned)kernel_page_dir); + if (CPU_HAS_FEATURE(CPU_FEATURE_PGE)) + set_cr4(get_cr4() | CR4_PGE); set_cr0(get_cr0() | CR0_PG | CR0_WP); flush_instr_queue(); @@ -301,6 +304,7 @@ void c_boot_entry(vm_offset_t bi) { /* Stash the boot_image_info pointer. */ boot_info = *(struct multiboot_info*)phystokv(bi); + int cpu_type; /* XXX we currently assume phys_mem_va is always 0 here - if it isn't, we must tweak the pointers in the boot_info. */ @@ -337,6 +341,8 @@ void c_boot_entry(vm_offset_t bi) } #endif /* MACH_KDB */ + cpu_type = discover_x86_cpu_type (); + /* * Do basic VM initialization */ @@ -367,7 +373,7 @@ void c_boot_entry(vm_offset_t bi) machine_slot[0].running = TRUE; machine_slot[0].cpu_subtype = CPU_SUBTYPE_AT386; - switch (discover_x86_cpu_type ()) + switch (cpu_type) { case 3: default: diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c index fef0d76..bd19613 100644 --- a/i386/intel/pmap.c +++ b/i386/intel/pmap.c @@ -80,6 +80,7 @@ #include <machine/thread.h> #include <i386/cpu_number.h> #include <i386/proc_reg.h> +#include <i386/locore.h> #ifdef ORC #define OLIVETTICACHE 1 @@ -547,6 +548,8 @@ vm_offset_t pmap_map_bd(virt, start, end, prot) register pt_entry_t *pte; template = pa_to_pte(start) | INTEL_PTE_VALID; + if (CPU_HAS_FEATURE(CPU_FEATURE_PGE)) + template |= INTEL_PTE_GLOBAL; if (prot & VM_PROT_WRITE) template |= INTEL_PTE_WRITE; @@ -627,6 +630,7 @@ void pmap_bootstrap() */ { vm_offset_t va; + pt_entry_t global = CPU_HAS_FEATURE(CPU_FEATURE_PGE) ? INTEL_PTE_GLOBAL : 0; /* * Map virtual memory for all known physical memory, 1-1, @@ -647,7 +651,7 @@ void pmap_bootstrap() /* Initialize the page directory entry. */ *pde = pa_to_pte((vm_offset_t)ptable) - | INTEL_PTE_VALID | INTEL_PTE_WRITE; + | INTEL_PTE_VALID | INTEL_PTE_WRITE | global; /* Initialize the page table. */ for (pte = ptable; (va < phys_last_addr) && (pte < ptable+NPTES); pte++) @@ -664,12 +668,12 @@ void pmap_bootstrap() && (va + INTEL_PGBYTES <= (vm_offset_t)etext)) { WRITE_PTE_FAST(pte, pa_to_pte(va) - | INTEL_PTE_VALID); + | INTEL_PTE_VALID | global); } else { WRITE_PTE_FAST(pte, pa_to_pte(va) - | INTEL_PTE_VALID | INTEL_PTE_WRITE); + | INTEL_PTE_VALID | INTEL_PTE_WRITE | global); } va += INTEL_PGBYTES; } |