svn commit: r185325 - projects/release_6_3_xen/sys/i386/xen
Kip Macy
kmacy at FreeBSD.org
Tue Nov 25 19:14:24 PST 2008
Author: kmacy
Date: Wed Nov 26 03:14:24 2008
New Revision: 185325
URL: http://svn.freebsd.org/changeset/base/185325
Log:
make initvalues able to handle an arbitrary number of page directories or page tables at startup
Modified:
projects/release_6_3_xen/sys/i386/xen/xen_machdep.c
Modified: projects/release_6_3_xen/sys/i386/xen/xen_machdep.c
==============================================================================
--- projects/release_6_3_xen/sys/i386/xen/xen_machdep.c Wed Nov 26 01:09:48 2008 (r185324)
+++ projects/release_6_3_xen/sys/i386/xen/xen_machdep.c Wed Nov 26 03:14:24 2008 (r185325)
@@ -821,16 +821,17 @@ initvalues(start_info_t *startinfo)
vm_offset_t cur_space, cur_space_pt;
struct physdev_set_iopl set_iopl;
- vm_paddr_t KPTphys, IdlePTDma;
vm_paddr_t console_page_ma, xen_store_ma;
- vm_offset_t KPTphysoff, tmpva;
+ vm_offset_t tmpva;
vm_paddr_t shinfo;
#ifdef PAE
vm_paddr_t IdlePDPTma, IdlePDPTnewma;
vm_paddr_t IdlePTDnewma[4];
pd_entry_t *IdlePDPTnew, *IdlePTDnew;
+ vm_paddr_t IdlePTDma[4];
#else
- vm_paddr_t pdir_shadow_ma;
+ vm_paddr_t IdlePTDma[1];
+
#endif
unsigned long i;
int ncpus = MAXCPU;
@@ -850,10 +851,37 @@ initvalues(start_info_t *startinfo)
#endif
xen_start_info = startinfo;
xen_phys_machine = (xen_pfn_t *)startinfo->mfn_list;
+ IdlePTD = (pd_entry_t *)((uint8_t *)startinfo->pt_base + PAGE_SIZE);
+ l1_pages = 0;
+
+#ifdef PAE
+ l3_pages = 1;
+ l2_pages = 0;
+ IdlePDPT = (pd_entry_t *)startinfo->pt_base;
+ IdlePDPTma = xpmap_ptom(VTOP(startinfo->pt_base));
+ for (i = (((KERNBASE >> 18) & PAGE_MASK) >> 30);
+ (i < 4) && (IdlePDPT[i] != 0); i++)
+ l2_pages++;
+ /*
+ * Note that only one page directory has been allocated at this point.
+ * Thus, if KERNBASE
+ */
+ for (i = 0; i < l2_pages; i++)
+ IdlePTDma[i] = xpmap_ptom(VTOP(IdlePTD + i*PAGE_SIZE));
+#else
+ l3_pages = 0;
+ l2_pages = 1;
+#endif
+ for (i = (((KERNBASE>>18) & PAGE_MASK)>>PAGE_SHIFT);
+ (i<l2_pages*NPDEPG) && (i<(VM_MAX_KERNEL_ADDRESS>>PDRSHIFT)); i++)
+ if (IdlePTD[i] != 0)
+ l1_pages++;
+
/* number of pages allocated after the pts + 1*/;
cur_space = xen_start_info->pt_base +
- ((xen_start_info->nr_pt_frames) + 3 )*PAGE_SIZE;
+ (l3_pages + l2_pages + l1_pages + 1)*PAGE_SIZE;
+
printk("initvalues(): wooh - availmem=%x,%x\n", avail_space, cur_space);
printk("KERNBASE=%x,pt_base=%x, VTOPFN(base)=%x, nr_pt_frames=%x\n",
@@ -861,55 +889,14 @@ initvalues(start_info_t *startinfo)
xen_start_info->nr_pt_frames);
xendebug_flags = 0; /* 0xffffffff; */
- /* allocate 4 pages for bootmem allocator */
- bootmem_start = bootmem_current = (char *)cur_space;
- cur_space += (4 * PAGE_SIZE);
- bootmem_end = (char *)cur_space;
-
- /* allocate pages for gdt */
- gdt = (union descriptor *)cur_space;
- cur_space += PAGE_SIZE*ncpus;
-
- /* allocate page for ldt */
- ldt = (union descriptor *)cur_space; cur_space += PAGE_SIZE;
- cur_space += PAGE_SIZE;
- HYPERVISOR_shared_info = (shared_info_t *)cur_space;
- cur_space += PAGE_SIZE;
-
- xen_store = (struct ringbuf_head *)cur_space;
- cur_space += PAGE_SIZE;
-
- console_page = (char *)cur_space;
- cur_space += PAGE_SIZE;
-
#ifdef ADD_ISA_HOLE
shift_phys_machine(xen_phys_machine, xen_start_info->nr_pages);
#endif
/*
* pre-zero unused mapped pages - mapped on 4MB boundary
*/
-#ifdef PAE
- IdlePDPT = (pd_entry_t *)startinfo->pt_base;
- IdlePDPTma = xpmap_ptom(VTOP(startinfo->pt_base));
- /*
- * Note that only one page directory has been allocated at this point.
- * Thus, if KERNBASE
- */
- IdlePTD = (pd_entry_t *)((uint8_t *)startinfo->pt_base + PAGE_SIZE);
- IdlePTDma = xpmap_ptom(VTOP(IdlePTD));
- l3_pages = 1;
-#else
- IdlePTD = (pd_entry_t *)startinfo->pt_base;
- IdlePTDma = xpmap_ptom(VTOP(startinfo->pt_base));
- l3_pages = 0;
-#endif
- l2_pages = 1;
- l1_pages = xen_start_info->nr_pt_frames - l2_pages - l3_pages;
-
- KPTphysoff = (l2_pages + l3_pages)*PAGE_SIZE;
- KPTphys = xpmap_ptom(VTOP(startinfo->pt_base + KPTphysoff));
XENPRINTF("IdlePTD %p\n", IdlePTD);
XENPRINTF("nr_pages: %ld shared_info: 0x%lx flags: 0x%lx pt_base: 0x%lx "
"mod_start: 0x%lx mod_len: 0x%lx\n",
@@ -918,16 +905,6 @@ initvalues(start_info_t *startinfo)
xen_start_info->mod_start, xen_start_info->mod_len);
/* Map proc0's KSTACK */
- proc0kstack = cur_space; cur_space += (KSTACK_PAGES * PAGE_SIZE);
- printk("proc0kstack=%u\n", proc0kstack);
-
- /* vm86/bios stack */
- cur_space += PAGE_SIZE;
-
- /* Map space for the vm86 region */
- vm86paddr = (vm_offset_t)cur_space;
- cur_space += (PAGE_SIZE * 3);
-
#ifdef PAE
IdlePDPTnew = (pd_entry_t *)cur_space; cur_space += PAGE_SIZE;
bzero(IdlePDPTnew, PAGE_SIZE);
@@ -948,7 +925,6 @@ initvalues(start_info_t *startinfo)
for (i = 0; i < 4; i++)
IdlePDPTnew[i] = IdlePTDnewma[i] | PG_V;
- __asm__("nop;");
/*
*
* re-map the new PDPT read-only
@@ -959,17 +935,30 @@ initvalues(start_info_t *startinfo)
* Unpin the current PDPT
*/
xen_pt_unpin(IdlePDPTma);
-
- for (i = 0; i < 20; i++) {
- int startidx = ((KERNBASE >> 18) & PAGE_MASK) >> 3;
-
- if (IdlePTD[startidx + i] == 0) {
- l1_pages = i;
- break;
- }
- }
#endif /* PAE */
+ proc0kstack = cur_space; cur_space += (KSTACK_PAGES * PAGE_SIZE);
+ printk("proc0kstack=%u\n", proc0kstack);
+
+ /* vm86/bios stack */
+ cur_space += PAGE_SIZE;
+
+ /* Map space for the vm86 region */
+ vm86paddr = (vm_offset_t)cur_space;
+ cur_space += (PAGE_SIZE * 3);
+
+ /* allocate 4 pages for bootmem allocator */
+ bootmem_start = bootmem_current = (char *)cur_space;
+ cur_space += (4 * PAGE_SIZE);
+ bootmem_end = (char *)cur_space;
+
+ /* allocate pages for gdt */
+ gdt = (union descriptor *)cur_space;
+ cur_space += PAGE_SIZE*ncpus;
+
+ /* allocate page for ldt */
+ ldt = (union descriptor *)cur_space; cur_space += PAGE_SIZE;
+ cur_space += PAGE_SIZE;
/* unmap remaining pages from initial 4MB chunk
*
@@ -1035,6 +1024,15 @@ initvalues(start_info_t *startinfo)
IdlePTD = IdlePTDnew;
IdlePDPT = IdlePDPTnew;
IdlePDPTma = IdlePDPTnewma;
+
+ HYPERVISOR_shared_info = (shared_info_t *)cur_space;
+ cur_space += PAGE_SIZE;
+
+ xen_store = (struct ringbuf_head *)cur_space;
+ cur_space += PAGE_SIZE;
+
+ console_page = (char *)cur_space;
+ cur_space += PAGE_SIZE;
/*
* shared_info is an unsigned long so this will randomly break if
@@ -1043,10 +1041,7 @@ initvalues(start_info_t *startinfo)
*/
shinfo = xen_start_info->shared_info;
PT_SET_MA(HYPERVISOR_shared_info, shinfo | PG_KERNEL);
-
printk("#4\n");
-
-
xen_store_ma = (((vm_paddr_t)xen_start_info->store_mfn) << PAGE_SHIFT);
PT_SET_MA(xen_store, xen_store_ma | PG_KERNEL);
console_page_ma = (((vm_paddr_t)xen_start_info->console.domU.mfn) << PAGE_SHIFT);
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