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head/sys/amd64/amd64/mp_machdep.c
| Show First 20 Lines • Show All 107 Lines • ▼ Show 20 Lines | mp_bootaddress(vm_paddr_t *physmap, unsigned int *physmap_idx) | ||||
| unsigned int i; | unsigned int i; | ||||
| bool allocated; | bool allocated; | ||||
| alloc_ap_trampoline(physmap, physmap_idx); | alloc_ap_trampoline(physmap, physmap_idx); | ||||
| allocated = false; | allocated = false; | ||||
| for (i = *physmap_idx; i <= *physmap_idx; i -= 2) { | for (i = *physmap_idx; i <= *physmap_idx; i -= 2) { | ||||
| /* | /* | ||||
| * Find a memory region big enough below the 4GB boundary to | * Find a memory region big enough below the 4GB | ||||
| * store the initial page tables. Note that it needs to be | * boundary to store the initial page tables. Region | ||||
| * aligned to a page boundary. | * must be mapped by the direct map. | ||||
| * | |||||
| * Note that it needs to be aligned to a page | |||||
| * boundary. | |||||
| */ | */ | ||||
| if (physmap[i] >= GiB(4) || | if (physmap[i] >= GiB(4) || physmap[i + 1] - | ||||
| (physmap[i + 1] - round_page(physmap[i])) < (PAGE_SIZE * 3)) | round_page(physmap[i]) < PAGE_SIZE * 3 || | ||||
| physmap[i + 1] > Maxmem) | |||||
| continue; | continue; | ||||
| allocated = true; | allocated = true; | ||||
| mptramp_pagetables = round_page(physmap[i]); | mptramp_pagetables = round_page(physmap[i]); | ||||
| physmap[i] = round_page(physmap[i]) + (PAGE_SIZE * 3); | physmap[i] = round_page(physmap[i]) + (PAGE_SIZE * 3); | ||||
| if (physmap[i] == physmap[i + 1] && *physmap_idx != 0) { | if (physmap[i] == physmap[i + 1] && *physmap_idx != 0) { | ||||
| memmove(&physmap[i], &physmap[i + 2], | memmove(&physmap[i], &physmap[i + 2], | ||||
| sizeof(*physmap) * (*physmap_idx - i + 2)); | sizeof(*physmap) * (*physmap_idx - i + 2)); | ||||
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