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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-03-14 01:14:58 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-03-14 01:14:58 +0100 |
| commit | 8ffbe78a0db6a916de0f0dfba6f4d9dd8dcf20ab (patch) | |
| tree | f06269b92f7d8603cd9d2a9ac7b9f4ec09487968 | |
| parent | 2700ef3ddc48b0e4e4f3033043e83b257ae87ff4 (diff) | |
Simplify i386at_init
* i386/i386at/model_dep.c (i386at_init): Do not copy linear into virtual kernel
mapping when they are equal, and do not drop the former either. Use the
function `i' variable.
| -rw-r--r-- | i386/i386at/model_dep.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 2f78520..1fc1bf9 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -388,21 +388,20 @@ i386at_init(void) * Also, set the WP bit so that on 486 or better processors * page-level write protection works in kernel mode. */ +#if VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS init_alloc_aligned(0, &addr); nb_direct = (addr + NPTES * PAGE_SIZE - 1) / (NPTES * PAGE_SIZE); for (i = 0; i < nb_direct; i++) kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS) + i] = kernel_page_dir[lin2pdenum(LINEAR_MIN_KERNEL_ADDRESS) + i]; +#endif #ifdef MACH_XEN - { - int i; - for (i = 0; i < PDPNUM; i++) - pmap_set_page_readonly_init((void*) kernel_page_dir + i * INTEL_PGBYTES); + for (i = 0; i < PDPNUM; i++) + pmap_set_page_readonly_init((void*) kernel_page_dir + i * INTEL_PGBYTES); #if PAE - pmap_set_page_readonly_init(kernel_pmap->pdpbase); + pmap_set_page_readonly_init(kernel_pmap->pdpbase); #endif /* PAE */ - } #endif /* MACH_XEN */ #if PAE set_cr3((unsigned)_kvtophys(kernel_pmap->pdpbase)); @@ -442,6 +441,7 @@ i386at_init(void) ldt_init(); ktss_init(); +#if VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS /* Get rid of the temporary direct mapping and flush it out of the TLB. */ for (i = 0 ; i < nb_direct; i++) { #ifdef MACH_XEN @@ -455,6 +455,7 @@ i386at_init(void) kernel_page_dir[lin2pdenum(VM_MIN_KERNEL_ADDRESS) + i] = 0; #endif /* MACH_XEN */ } +#endif /* Not used after boot, better give it back. */ #ifdef MACH_XEN |