/* Validate the physical addressing limitations of the model */ void __meminit mminit_validate_memmodel_limits(unsigned long *start_pfn, unsigned long *end_pfn) { unsigned long max_sparsemem_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT); /* * Sanity checks - do not allow an architecture to pass * in larger pfns than the maximum scope of sparsemem: */ if (*start_pfn > max_sparsemem_pfn) { mminit_dprintk(MMINIT_WARNING, "pfnvalidation", "Start of range %lu -> %lu exceeds SPARSEMEM max %lu\n", *start_pfn, *end_pfn, max_sparsemem_pfn); WARN_ON_ONCE(1); *start_pfn = max_sparsemem_pfn; *end_pfn = max_sparsemem_pfn; } if (*end_pfn > max_sparsemem_pfn) { mminit_dprintk(MMINIT_WARNING, "pfnvalidation", "End of range %lu -> %lu exceeds SPARSEMEM max %lu\n", *start_pfn, *end_pfn, max_sparsemem_pfn); WARN_ON_ONCE(1); *end_pfn = max_sparsemem_pfn; } }
void __init mminit_verify_pageflags_layout(void) { int shift, width; unsigned long or_mask, add_mask; shift = 8 * sizeof(unsigned long); width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_CPUPID_SHIFT; mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths", "Section %d Node %d Zone %d Lastcpupid %d Flags %d\n", SECTIONS_WIDTH, NODES_WIDTH, ZONES_WIDTH, LAST_CPUPID_WIDTH, NR_PAGEFLAGS); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts", "Section %d Node %d Zone %d Lastcpupid %d\n", SECTIONS_SHIFT, NODES_SHIFT, ZONES_SHIFT, LAST_CPUPID_SHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts", "Section %lu Node %lu Zone %lu Lastcpupid %lu\n", (unsigned long)SECTIONS_PGSHIFT, (unsigned long)NODES_PGSHIFT, (unsigned long)ZONES_PGSHIFT, (unsigned long)LAST_CPUPID_PGSHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid", "Node/Zone ID: %lu -> %lu\n", (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT), (unsigned long)ZONEID_PGOFF); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_usage", "location: %d -> %d layout %d -> %d unused %d -> %d page-flags\n", shift, width, width, NR_PAGEFLAGS, NR_PAGEFLAGS, 0); #ifdef NODE_NOT_IN_PAGE_FLAGS mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags", "Node not in page flags"); #endif #ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags", "Last cpupid not in page flags"); #endif if (SECTIONS_WIDTH) { shift -= SECTIONS_WIDTH; BUG_ON(shift != SECTIONS_PGSHIFT); } if (NODES_WIDTH) { shift -= NODES_WIDTH; BUG_ON(shift != NODES_PGSHIFT); } if (ZONES_WIDTH) { shift -= ZONES_WIDTH; BUG_ON(shift != ZONES_PGSHIFT); } /* Check for bitmask overlaps */ or_mask = (ZONES_MASK << ZONES_PGSHIFT) | (NODES_MASK << NODES_PGSHIFT) | (SECTIONS_MASK << SECTIONS_PGSHIFT); add_mask = (ZONES_MASK << ZONES_PGSHIFT) + (NODES_MASK << NODES_PGSHIFT) + (SECTIONS_MASK << SECTIONS_PGSHIFT); BUG_ON(or_mask != add_mask); }