Date: Sat, 15 Nov 2003 19:30:59 -0800 (PST) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 42509 for review Message-ID: <200311160330.hAG3UxR0028387@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=42509 Change 42509 by peter@peter_overcee on 2003/11/15 19:30:12 create AP bootstrap page tables Affected files ... .. //depot/projects/hammer/sys/amd64/amd64/mp_machdep.c#30 edit Differences ... ==== //depot/projects/hammer/sys/amd64/amd64/mp_machdep.c#30 (text+ko) ==== @@ -454,7 +454,8 @@ u_char mpbiosreason; u_int32_t mpbioswarmvec; struct pcpu *pc; - int x, apic_id, cpu; + int x, apic_id, cpu, i; + u_int64_t *pt4, *pt3, *pt2; mtx_init(&ap_boot_mtx, "ap boot", NULL, MTX_SPIN); @@ -462,6 +463,28 @@ pmap_kenter(boot_address + KERNBASE, boot_address); bcopy(mptramp_start, (void *)((uintptr_t)boot_address + KERNBASE), bootMP_size); + /* Locate the page tables, they'll be below the trampoline */ + pt4 = (u_int64_t *)(uintptr_t)mptramp_pagetables; + pt3 = pt4 + 512; + pt2 = pt3 + 512; + printf("pt4 = %p; pt3 = %p; pt2 = %p\n", pt4, pt3, pt2); + + /* Create the initial 1GB replicated page tables */ + for (i = 0; i < 512; i++) { + /* Each slot of the level 4 pages points to the same level 3 page */ + pt4[i] = (u_int64_t)(uintptr_t)pt3; + pt4[i] = PG_V | PG_RW | PG_U; + + /* Each slot of the level 3 pages points to the same level 2 page */ + pt3[i] = (u_int64_t)(uintptr_t)pt2; + pt3[i] = PG_V | PG_RW | PG_U; + + /* The level 2 page slots are mapped with 2MB pages for 1GB. */ + pt2[i] = i * (2 * 1024 * 1024); + pt2[i] = PG_V | PG_RW | PG_PS | PG_U; + } + printf("pagetables created\n"); + /* save the current value of the warm-start vector */ mpbioswarmvec = *((u_int32_t *) WARMBOOT_OFF); outb(CMOS_REG, BIOS_RESET);help
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