| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 1998-2003 Hewlett-Packard Co |
| * David Mosberger-Tang <davidm@hpl.hp.com> |
| * Stephane Eranian <eranian@hpl.hp.com> |
| * Copyright (C) 2000, Rohit Seth <rohit.seth@intel.com> |
| * Copyright (C) 1999 VA Linux Systems |
| * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> |
| * Copyright (C) 2003 Silicon Graphics, Inc. All rights reserved. |
| * |
| * Routines used by ia64 machines with contiguous (or virtually contiguous) |
| * memory. |
| */ |
| #include <linux/efi.h> |
| #include <linux/memblock.h> |
| #include <linux/mm.h> |
| #include <linux/nmi.h> |
| #include <linux/swap.h> |
| |
| #include <asm/meminit.h> |
| #include <asm/pgalloc.h> |
| #include <asm/pgtable.h> |
| #include <asm/sections.h> |
| #include <asm/mca.h> |
| |
| #ifdef CONFIG_VIRTUAL_MEM_MAP |
| static unsigned long max_gap; |
| #endif |
| |
| /* physical address where the bootmem map is located */ |
| unsigned long bootmap_start; |
| |
| #ifdef CONFIG_SMP |
| static void *cpu_data; |
| /** |
| * per_cpu_init - setup per-cpu variables |
| * |
| * Allocate and setup per-cpu data areas. |
| */ |
| void *per_cpu_init(void) |
| { |
| static bool first_time = true; |
| void *cpu0_data = __cpu0_per_cpu; |
| unsigned int cpu; |
| |
| if (!first_time) |
| goto skip; |
| first_time = false; |
| |
| /* |
| * get_free_pages() cannot be used before cpu_init() done. |
| * BSP allocates PERCPU_PAGE_SIZE bytes for all possible CPUs |
| * to avoid that AP calls get_zeroed_page(). |
| */ |
| for_each_possible_cpu(cpu) { |
| void *src = cpu == 0 ? cpu0_data : __phys_per_cpu_start; |
| |
| memcpy(cpu_data, src, __per_cpu_end - __per_cpu_start); |
| __per_cpu_offset[cpu] = (char *)cpu_data - __per_cpu_start; |
| per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; |
| |
| /* |
| * percpu area for cpu0 is moved from the __init area |
| * which is setup by head.S and used till this point. |
| * Update ar.k3. This move is ensures that percpu |
| * area for cpu0 is on the correct node and its |
| * virtual address isn't insanely far from other |
| * percpu areas which is important for congruent |
| * percpu allocator. |
| */ |
| if (cpu == 0) |
| ia64_set_kr(IA64_KR_PER_CPU_DATA, __pa(cpu_data) - |
| (unsigned long)__per_cpu_start); |
| |
| cpu_data += PERCPU_PAGE_SIZE; |
| } |
| skip: |
| return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; |
| } |
| |
| static inline void |
| alloc_per_cpu_data(void) |
| { |
| size_t size = PERCPU_PAGE_SIZE * num_possible_cpus(); |
| |
| cpu_data = memblock_alloc_from(size, PERCPU_PAGE_SIZE, |
| __pa(MAX_DMA_ADDRESS)); |
| if (!cpu_data) |
| panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n", |
| __func__, size, PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); |
| } |
| |
| /** |
| * setup_per_cpu_areas - setup percpu areas |
| * |
| * Arch code has already allocated and initialized percpu areas. All |
| * this function has to do is to teach the determined layout to the |
| * dynamic percpu allocator, which happens to be more complex than |
| * creating whole new ones using helpers. |
| */ |
| void __init |
| setup_per_cpu_areas(void) |
| { |
| struct pcpu_alloc_info *ai; |
| struct pcpu_group_info *gi; |
| unsigned int cpu; |
| ssize_t static_size, reserved_size, dyn_size; |
| |
| ai = pcpu_alloc_alloc_info(1, num_possible_cpus()); |
| if (!ai) |
| panic("failed to allocate pcpu_alloc_info"); |
| gi = &ai->groups[0]; |
| |
| /* units are assigned consecutively to possible cpus */ |
| for_each_possible_cpu(cpu) |
| gi->cpu_map[gi->nr_units++] = cpu; |
| |
| /* set parameters */ |
| static_size = __per_cpu_end - __per_cpu_start; |
| reserved_size = PERCPU_MODULE_RESERVE; |
| dyn_size = PERCPU_PAGE_SIZE - static_size - reserved_size; |
| if (dyn_size < 0) |
| panic("percpu area overflow static=%zd reserved=%zd\n", |
| static_size, reserved_size); |
| |
| ai->static_size = static_size; |
| ai->reserved_size = reserved_size; |
| ai->dyn_size = dyn_size; |
| ai->unit_size = PERCPU_PAGE_SIZE; |
| ai->atom_size = PAGE_SIZE; |
| ai->alloc_size = PERCPU_PAGE_SIZE; |
| |
| pcpu_setup_first_chunk(ai, __per_cpu_start + __per_cpu_offset[0]); |
| pcpu_free_alloc_info(ai); |
| } |
| #else |
| #define alloc_per_cpu_data() do { } while (0) |
| #endif /* CONFIG_SMP */ |
| |
| /** |
| * find_memory - setup memory map |
| * |
| * Walk the EFI memory map and find usable memory for the system, taking |
| * into account reserved areas. |
| */ |
| void __init |
| find_memory (void) |
| { |
| reserve_memory(); |
| |
| /* first find highest page frame number */ |
| min_low_pfn = ~0UL; |
| max_low_pfn = 0; |
| efi_memmap_walk(find_max_min_low_pfn, NULL); |
| max_pfn = max_low_pfn; |
| |
| #ifdef CONFIG_VIRTUAL_MEM_MAP |
| efi_memmap_walk(filter_memory, register_active_ranges); |
| #else |
| memblock_add_node(0, PFN_PHYS(max_low_pfn), 0); |
| #endif |
| |
| find_initrd(); |
| |
| alloc_per_cpu_data(); |
| } |
| |
| /* |
| * Set up the page tables. |
| */ |
| |
| void __init |
| paging_init (void) |
| { |
| unsigned long max_dma; |
| unsigned long max_zone_pfns[MAX_NR_ZONES]; |
| |
| memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
| #ifdef CONFIG_ZONE_DMA32 |
| max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT; |
| max_zone_pfns[ZONE_DMA32] = max_dma; |
| #endif |
| max_zone_pfns[ZONE_NORMAL] = max_low_pfn; |
| |
| #ifdef CONFIG_VIRTUAL_MEM_MAP |
| efi_memmap_walk(find_largest_hole, (u64 *)&max_gap); |
| if (max_gap < LARGE_GAP) { |
| vmem_map = (struct page *) 0; |
| } else { |
| unsigned long map_size; |
| |
| /* allocate virtual_mem_map */ |
| |
| map_size = PAGE_ALIGN(ALIGN(max_low_pfn, MAX_ORDER_NR_PAGES) * |
| sizeof(struct page)); |
| VMALLOC_END -= map_size; |
| vmem_map = (struct page *) VMALLOC_END; |
| efi_memmap_walk(create_mem_map_page_table, NULL); |
| |
| /* |
| * alloc_node_mem_map makes an adjustment for mem_map |
| * which isn't compatible with vmem_map. |
| */ |
| NODE_DATA(0)->node_mem_map = vmem_map + |
| find_min_pfn_with_active_regions(); |
| |
| printk("Virtual mem_map starts at 0x%p\n", mem_map); |
| } |
| #endif /* !CONFIG_VIRTUAL_MEM_MAP */ |
| free_area_init(max_zone_pfns); |
| zero_page_memmap_ptr = virt_to_page(ia64_imva(empty_zero_page)); |
| } |