diff options
Diffstat (limited to 'i386/i386at/model_dep.c')
| -rw-r--r-- | i386/i386at/model_dep.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/i386/i386at/model_dep.c b/i386/i386at/model_dep.c index 9dbe7e01..e0995c96 100644 --- a/i386/i386at/model_dep.c +++ b/i386/i386at/model_dep.c @@ -66,6 +66,7 @@ #include <i386/locore.h> #include <i386/model_dep.h> #include <i386/smp.h> +#include <i386/seg.h> #include <i386at/acpi_parse_apic.h> #include <i386at/autoconf.h> #include <i386at/biosmem.h> @@ -125,6 +126,9 @@ char *kernel_cmdline = ""; extern char version[]; +/* Realmode temporary GDT */ +extern struct pseudo_descriptor gdt_descr_tmp; + /* If set, reboot the system on ctrl-alt-delete. */ boolean_t rebootflag = FALSE; /* exported to kdintr */ @@ -207,6 +211,20 @@ void machine_init(void) */ pmap_unmap_page_zero(); #endif + +#ifdef APIC + /* + * Grab an early page for AP boot code + */ + /* FIXME: this may not allocate from below 1MB, if within first 16MB */ + apboot_addr = vm_page_to_pa(vm_page_grab_contig(PAGE_SIZE, VM_PAGE_SEL_DMA)); + assert (apboot_addr < 0x100000); + + /* + * Patch the realmode gdt with the correct offset + */ + gdt_descr_tmp.linear_base += apboot_addr; +#endif } /* Conserve power on processor CPU. */ |