diff options
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 1006 |
1 files changed, 728 insertions, 278 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index f37078d96407..4cad0b32b0af 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -24,6 +24,8 @@ #include <linux/cache.h> #include <linux/sort.h> #include <linux/percpu.h> +#include <linux/lmb.h> +#include <linux/mmzone.h> #include <asm/head.h> #include <asm/system.h> @@ -72,9 +74,7 @@ extern struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES]; #define MAX_BANKS 32 static struct linux_prom64_registers pavail[MAX_BANKS] __initdata; -static struct linux_prom64_registers pavail_rescan[MAX_BANKS] __initdata; static int pavail_ents __initdata; -static int pavail_rescan_ents __initdata; static int cmp_p64(const void *a, const void *b) { @@ -160,6 +160,7 @@ extern unsigned int sparc_ramdisk_image; extern unsigned int sparc_ramdisk_size; struct page *mem_map_zero __read_mostly; +EXPORT_SYMBOL(mem_map_zero); unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly; @@ -715,286 +716,685 @@ out: smp_new_mmu_context_version(); } -/* Find a free area for the bootmem map, avoiding the kernel image - * and the initial ramdisk. - */ -static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn, - unsigned long end_pfn) +static int numa_enabled = 1; +static int numa_debug; + +static int __init early_numa(char *p) { - unsigned long avoid_start, avoid_end, bootmap_size; - int i; + if (!p) + return 0; + + if (strstr(p, "off")) + numa_enabled = 0; - bootmap_size = bootmem_bootmap_pages(end_pfn - start_pfn); - bootmap_size <<= PAGE_SHIFT; + if (strstr(p, "debug")) + numa_debug = 1; - avoid_start = avoid_end = 0; + return 0; +} +early_param("numa", early_numa); + +#define numadbg(f, a...) \ +do { if (numa_debug) \ + printk(KERN_INFO f, ## a); \ +} while (0) + +static void __init find_ramdisk(unsigned long phys_base) +{ #ifdef CONFIG_BLK_DEV_INITRD - avoid_start = initrd_start; - avoid_end = PAGE_ALIGN(initrd_end); + if (sparc_ramdisk_image || sparc_ramdisk_image64) { + unsigned long ramdisk_image; + + /* Older versions of the bootloader only supported a + * 32-bit physical address for the ramdisk image + * location, stored at sparc_ramdisk_image. Newer + * SILO versions set sparc_ramdisk_image to zero and + * provide a full 64-bit physical address at + * sparc_ramdisk_image64. + */ + ramdisk_image = sparc_ramdisk_image; + if (!ramdisk_image) + ramdisk_image = sparc_ramdisk_image64; + + /* Another bootloader quirk. The bootloader normalizes + * the physical address to KERNBASE, so we have to + * factor that back out and add in the lowest valid + * physical page address to get the true physical address. + */ + ramdisk_image -= KERNBASE; + ramdisk_image += phys_base; + + numadbg("Found ramdisk at physical address 0x%lx, size %u\n", + ramdisk_image, sparc_ramdisk_size); + + initrd_start = ramdisk_image; + initrd_end = ramdisk_image + sparc_ramdisk_size; + + lmb_reserve(initrd_start, initrd_end); + } #endif +} - for (i = 0; i < pavail_ents; i++) { - unsigned long start, end; +struct node_mem_mask { + unsigned long mask; + unsigned long val; + unsigned long bootmem_paddr; +}; +static struct node_mem_mask node_masks[MAX_NUMNODES]; +static int num_node_masks; - start = pavail[i].phys_addr; - end = start + pavail[i].reg_size; +int numa_cpu_lookup_table[NR_CPUS]; +cpumask_t numa_cpumask_lookup_table[MAX_NUMNODES]; - while (start < end) { - if (start >= kern_base && - start < PAGE_ALIGN(kern_base + kern_size)) { - start = PAGE_ALIGN(kern_base + kern_size); - continue; - } - if (start >= avoid_start && start < avoid_end) { - start = avoid_end; - continue; - } +#ifdef CONFIG_NEED_MULTIPLE_NODES +static bootmem_data_t plat_node_bdata[MAX_NUMNODES]; - if ((end - start) < bootmap_size) - break; +struct mdesc_mblock { + u64 base; + u64 size; + u64 offset; /* RA-to-PA */ +}; +static struct mdesc_mblock *mblocks; +static int num_mblocks; - if (start < kern_base && - (start + bootmap_size) > kern_base) { - start = PAGE_ALIGN(kern_base + kern_size); - continue; - } +static unsigned long ra_to_pa(unsigned long addr) +{ + int i; - if (start < avoid_start && - (start + bootmap_size) > avoid_start) { - start = avoid_end; - continue; - } + for (i = 0; i < num_mblocks; i++) { + struct mdesc_mblock *m = &mblocks[i]; - /* OK, it doesn't overlap anything, use it. */ - return start >> PAGE_SHIFT; + if (addr >= m->base && + addr < (m->base + m->size)) { + addr += m->offset; + break; } } - - prom_printf("Cannot find free area for bootmap, aborting.\n"); - prom_halt(); + return addr; } -static void __init trim_pavail(unsigned long *cur_size_p, - unsigned long *end_of_phys_p) +static int find_node(unsigned long addr) { - unsigned long to_trim = *cur_size_p - cmdline_memory_size; - unsigned long avoid_start, avoid_end; int i; - to_trim = PAGE_ALIGN(to_trim); + addr = ra_to_pa(addr); + for (i = 0; i < num_node_masks; i++) { + struct node_mem_mask *p = &node_masks[i]; - avoid_start = avoid_end = 0; -#ifdef CONFIG_BLK_DEV_INITRD - avoid_start = initrd_start; - avoid_end = PAGE_ALIGN(initrd_end); + if ((addr & p->mask) == p->val) + return i; + } + return -1; +} + +static unsigned long nid_range(unsigned long start, unsigned long end, + int *nid) +{ + *nid = find_node(start); + start += PAGE_SIZE; + while (start < end) { + int n = find_node(start); + + if (n != *nid) + break; + start += PAGE_SIZE; + } + + return start; +} +#else +static unsigned long nid_range(unsigned long start, unsigned long end, + int *nid) +{ + *nid = 0; + return end; +} #endif - /* Trim some pavail[] entries in order to satisfy the - * requested "mem=xxx" kernel command line specification. - * - * We must not trim off the kernel image area nor the - * initial ramdisk range (if any). Also, we must not trim - * any pavail[] entry down to zero in order to preserve - * the invariant that all pavail[] entries have a non-zero - * size which is assumed by all of the code in here. - */ - for (i = 0; i < pavail_ents; i++) { - unsigned long start, end, kern_end; - unsigned long trim_low, trim_high, n; +/* This must be invoked after performing all of the necessary + * add_active_range() calls for 'nid'. We need to be able to get + * correct data from get_pfn_range_for_nid(). + */ +static void __init allocate_node_data(int nid) +{ + unsigned long paddr, num_pages, start_pfn, end_pfn; + struct pglist_data *p; + +#ifdef CONFIG_NEED_MULTIPLE_NODES + paddr = lmb_alloc_nid(sizeof(struct pglist_data), + SMP_CACHE_BYTES, nid, nid_range); + if (!paddr) { + prom_printf("Cannot allocate pglist_data for nid[%d]\n", nid); + prom_halt(); + } + NODE_DATA(nid) = __va(paddr); + memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); - kern_end = PAGE_ALIGN(kern_base + kern_size); + NODE_DATA(nid)->bdata = &plat_node_bdata[nid]; +#endif - trim_low = start = pavail[i].phys_addr; - trim_high = end = start + pavail[i].reg_size; + p = NODE_DATA(nid); - if (kern_base >= start && - kern_base < end) { - trim_low = kern_base; - if (kern_end >= end) - continue; - } - if (kern_end >= start && - kern_end < end) { - trim_high = kern_end; - } - if (avoid_start && - avoid_start >= start && - avoid_start < end) { - if (trim_low > avoid_start) - trim_low = avoid_start; - if (avoid_end >= end) - continue; - } - if (avoid_end && - avoid_end >= start && - avoid_end < end) { - if (trim_high < avoid_end) - trim_high = avoid_end; + get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); + p->node_start_pfn = start_pfn; + p->node_spanned_pages = end_pfn - start_pfn; + + if (p->node_spanned_pages) { + num_pages = bootmem_bootmap_pages(p->node_spanned_pages); + + paddr = lmb_alloc_nid(num_pages << PAGE_SHIFT, PAGE_SIZE, nid, + nid_range); + if (!paddr) { + prom_printf("Cannot allocate bootmap for nid[%d]\n", + nid); + prom_halt(); } + node_masks[nid].bootmem_paddr = paddr; + } +} + +static void init_node_masks_nonnuma(void) +{ + int i; + + numadbg("Initializing tables for non-numa.\n"); + + node_masks[0].mask = node_masks[0].val = 0; + num_node_masks = 1; + + for (i = 0; i < NR_CPUS; i++) + numa_cpu_lookup_table[i] = 0; - if (trim_high <= trim_low) + numa_cpumask_lookup_table[0] = CPU_MASK_ALL; +} + +#ifdef CONFIG_NEED_MULTIPLE_NODES +struct pglist_data *node_data[MAX_NUMNODES]; + +EXPORT_SYMBOL(numa_cpu_lookup_table); +EXPORT_SYMBOL(numa_cpumask_lookup_table); +EXPORT_SYMBOL(node_data); + +struct mdesc_mlgroup { + u64 node; + u64 latency; + u64 match; + u64 mask; +}; +static struct mdesc_mlgroup *mlgroups; +static int num_mlgroups; + +static int scan_pio_for_cfg_handle(struct mdesc_handle *md, u64 pio, + u32 cfg_handle) +{ + u64 arc; + + mdesc_for_each_arc(arc, md, pio, MDESC_ARC_TYPE_FWD) { + u64 target = mdesc_arc_target(md, arc); + const u64 *val; + + val = mdesc_get_property(md, target, + "cfg-handle", NULL); + if (val && *val == cfg_handle) + return 0; + } + return -ENODEV; +} + +static int scan_arcs_for_cfg_handle(struct mdesc_handle *md, u64 grp, + u32 cfg_handle) +{ + u64 arc, candidate, best_latency = ~(u64)0; + + candidate = MDESC_NODE_NULL; + mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) { + u64 target = mdesc_arc_target(md, arc); + const char *name = mdesc_node_name(md, target); + const u64 *val; + + if (strcmp(name, "pio-latency-group")) continue; - if (trim_low == start && trim_high == end) { - /* Whole chunk is available for trimming. - * Trim all except one page, in order to keep - * entry non-empty. - */ - n = (end - start) - PAGE_SIZE; - if (n > to_trim) - n = to_trim; - - if (n) { - pavail[i].phys_addr += n; - pavail[i].reg_size -= n; - to_trim -= n; - } - } else { - n = (trim_low - start); - if (n > to_trim) - n = to_trim; - - if (n) { - pavail[i].phys_addr += n; - pavail[i].reg_size -= n; - to_trim -= n; - } - if (to_trim) { - n = end - trim_high; - if (n > to_trim) - n = to_trim; - if (n) { - pavail[i].reg_size -= n; - to_trim -= n; - } - } + val = mdesc_get_property(md, target, "latency", NULL); + if (!val) + continue; + + if (*val < best_latency) { + candidate = target; + best_latency = *val; } + } + + if (candidate == MDESC_NODE_NULL) + return -ENODEV; + + return scan_pio_for_cfg_handle(md, candidate, cfg_handle); +} - if (!to_trim) +int of_node_to_nid(struct device_node *dp) +{ + const struct linux_prom64_registers *regs; + struct mdesc_handle *md; + u32 cfg_handle; + int count, nid; + u64 grp; + + if (!mlgroups) + return -1; + + regs = of_get_property(dp, "reg", NULL); + if (!regs) + return -1; + + cfg_handle = (regs->phys_addr >> 32UL) & 0x0fffffff; + + md = mdesc_grab(); + + count = 0; + nid = -1; + mdesc_for_each_node_by_name(md, grp, "group") { + if (!scan_arcs_for_cfg_handle(md, grp, cfg_handle)) { + nid = count; break; + } + count++; } - /* Recalculate. */ - *cur_size_p = 0UL; - for (i = 0; i < pavail_ents; i++) { - *end_of_phys_p = pavail[i].phys_addr + - pavail[i].reg_size; - *cur_size_p += pavail[i].reg_size; - } + mdesc_release(md); + + return nid; } -/* About pages_avail, this is the value we will use to calculate - * the zholes_size[] argument given to free_area_init_node(). The - * page allocator uses this to calculate nr_kernel_pages, - * nr_all_pages and zone->present_pages. On NUMA it is used - * to calculate zone->min_unmapped_pages and zone->min_slab_pages. - * - * So this number should really be set to what the page allocator - * actually ends up with. This means: - * 1) It should include bootmem map pages, we'll release those. - * 2) It should not include the kernel image, except for the - * __init sections which we will also release. - * 3) It should include the initrd image, since we'll release - * that too. - */ -static unsigned long __init bootmem_init(unsigned long *pages_avail, - unsigned long phys_base) +static void add_node_ranges(void) { - unsigned long bootmap_size, end_pfn; - unsigned long end_of_phys_memory = 0UL; - unsigned long bootmap_pfn, bytes_avail, size; int i; - bytes_avail = 0UL; - for (i = 0; i < pavail_ents; i++) { - end_of_phys_memory = pavail[i].phys_addr + - pavail[i].reg_size; - bytes_avail += pavail[i].reg_size; + for (i = 0; i < lmb.memory.cnt; i++) { + unsigned long size = lmb_size_bytes(&lmb.memory, i); + unsigned long start, end; + + start = lmb.memory.region[i].base; + end = start + size; + while (start < end) { + unsigned long this_end; + int nid; + + this_end = nid_range(start, end, &nid); + + numadbg("Adding active range nid[%d] " + "start[%lx] end[%lx]\n", + nid, start, this_end); + + add_active_range(nid, + start >> PAGE_SHIFT, + this_end >> PAGE_SHIFT); + + start = this_end; + } } +} - /* Determine the location of the initial ramdisk before trying - * to honor the "mem=xxx" command line argument. We must know - * where the kernel image and the ramdisk image are so that we - * do not trim those two areas from the physical memory map. - */ +static int __init grab_mlgroups(struct mdesc_handle *md) +{ + unsigned long paddr; + int count = 0; + u64 node; + + mdesc_for_each_node_by_name(md, node, "memory-latency-group") + count++; + if (!count) + return -ENOENT; + + paddr = lmb_alloc(count * sizeof(struct mdesc_mlgroup), + SMP_CACHE_BYTES); + if (!paddr) + return -ENOMEM; + + mlgroups = __va(paddr); + num_mlgroups = count; + + count = 0; + mdesc_for_each_node_by_name(md, node, "memory-latency-group") { + struct mdesc_mlgroup *m = &mlgroups[count++]; + const u64 *val; + + m->node = node; + + val = mdesc_get_property(md, node, "latency", NULL); + m->latency = *val; + val = mdesc_get_property(md, node, "address-match", NULL); + m->match = *val; + val = mdesc_get_property(md, node, "address-mask", NULL); + m->mask = *val; + + numadbg("MLGROUP[%d]: node[%lx] latency[%lx] " + "match[%lx] mask[%lx]\n", + count - 1, m->node, m->latency, m->match, m->mask); + } -#ifdef CONFIG_BLK_DEV_INITRD - /* Now have to check initial ramdisk, so that bootmap does not overwrite it */ - if (sparc_ramdisk_image || sparc_ramdisk_image64) { - unsigned long ramdisk_image = sparc_ramdisk_image ? - sparc_ramdisk_image : sparc_ramdisk_image64; - ramdisk_image -= KERNBASE; - initrd_start = ramdisk_image + phys_base; - initrd_end = initrd_start + sparc_ramdisk_size; - if (initrd_end > end_of_phys_memory) { - printk(KERN_CRIT "initrd extends beyond end of memory " - "(0x%016lx > 0x%016lx)\ndisabling initrd\n", - initrd_end, end_of_phys_memory); - initrd_start = 0; - initrd_end = 0; + return 0; +} + +static int __init grab_mblocks(struct mdesc_handle *md) +{ + unsigned long paddr; + int count = 0; + u64 node; + + mdesc_for_each_node_by_name(md, node, "mblock") + count++; + if (!count) + return -ENOENT; + + paddr = lmb_alloc(count * sizeof(struct mdesc_mblock), + SMP_CACHE_BYTES); + if (!paddr) + return -ENOMEM; + + mblocks = __va(paddr); + num_mblocks = count; + + count = 0; + mdesc_for_each_node_by_name(md, node, "mblock") { + struct mdesc_mblock *m = &mblocks[count++]; + const u64 *val; + + val = mdesc_get_property(md, node, "base", NULL); + m->base = *val; + val = mdesc_get_property(md, node, "size", NULL); + m->size = *val; + val = mdesc_get_property(md, node, + "address-congruence-offset", NULL); + m->offset = *val; + + numadbg("MBLOCK[%d]: base[%lx] size[%lx] offset[%lx]\n", + count - 1, m->base, m->size, m->offset); + } + + return 0; +} + +static void __init numa_parse_mdesc_group_cpus(struct mdesc_handle *md, + u64 grp, cpumask_t *mask) +{ + u64 arc; + + cpus_clear(*mask); + + mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_BACK) { + u64 target = mdesc_arc_target(md, arc); + const char *name = mdesc_node_name(md, target); + const u64 *id; + + if (strcmp(name, "cpu")) + continue; + id = mdesc_get_property(md, target, "id", NULL); + if (*id < NR_CPUS) + cpu_set(*id, *mask); + } +} + +static struct mdesc_mlgroup * __init find_mlgroup(u64 node) +{ + int i; + + for (i = 0; i < num_mlgroups; i++) { + struct mdesc_mlgroup *m = &mlgroups[i]; + if (m->node == node) + return m; + } + return NULL; +} + +static int __init numa_attach_mlgroup(struct mdesc_handle *md, u64 grp, + int index) +{ + struct mdesc_mlgroup *candidate = NULL; + u64 arc, best_latency = ~(u64)0; + struct node_mem_mask *n; + + mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) { + u64 target = mdesc_arc_target(md, arc); + struct mdesc_mlgroup *m = find_mlgroup(target); + if (!m) + continue; + if (m->latency < best_latency) { + candidate = m; + best_latency = m->latency; } } -#endif + if (!candidate) + return -ENOENT; + + if (num_node_masks != index) { + printk(KERN_ERR "Inconsistent NUMA state, " + "index[%d] != num_node_masks[%d]\n", + index, num_node_masks); + return -EINVAL; + } - if (cmdline_memory_size && - bytes_avail > cmdline_memory_size) - trim_pavail(&bytes_avail, - &end_of_phys_memory); + n = &node_masks[num_node_masks++]; - *pages_avail = bytes_avail >> PAGE_SHIFT; + n->mask = candidate->mask; + n->val = candidate->match; - end_pfn = end_of_phys_memory >> PAGE_SHIFT; + numadbg("NUMA NODE[%d]: mask[%lx] val[%lx] (latency[%lx])\n", + index, n->mask, n->val, candidate->latency); - /* Initialize the boot-time allocator. */ - max_pfn = max_low_pfn = end_pfn; - min_low_pfn = (phys_base >> PAGE_SHIFT); + return 0; +} - bootmap_pfn = choose_bootmap_pfn(min_low_pfn, end_pfn); +static int __init numa_parse_mdesc_group(struct mdesc_handle *md, u64 grp, + int index) +{ + cpumask_t mask; + int cpu; - bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, - min_low_pfn, end_pfn); + numa_parse_mdesc_group_cpus(md, grp, &mask); - /* Now register the available physical memory with the - * allocator. - */ - for (i = 0; i < pavail_ents; i++) - free_bootmem(pavail[i].phys_addr, pavail[i].reg_size); + for_each_cpu_mask(cpu, mask) + numa_cpu_lookup_table[cpu] = index; + numa_cpumask_lookup_table[index] = mask; -#ifdef CONFIG_BLK_DEV_INITRD - if (initrd_start) { - size = initrd_end - initrd_start; + if (numa_debug) { + printk(KERN_INFO "NUMA GROUP[%d]: cpus [ ", index); + for_each_cpu_mask(cpu, mask) + printk("%d ", cpu); + printk("]\n"); + } - /* Reserve the initrd image area. */ - reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT); + return numa_attach_mlgroup(md, grp, index); +} - initrd_start += PAGE_OFFSET; - initrd_end += PAGE_OFFSET; +static int __init numa_parse_mdesc(void) +{ + struct mdesc_handle *md = mdesc_grab(); + int i, err, count; + u64 node; + + node = mdesc_node_by_name(md, MDESC_NODE_NULL, "latency-groups"); + if (node == MDESC_NODE_NULL) { + mdesc_release(md); + return -ENOENT; + } + + err = grab_mblocks(md); + if (err < 0) + goto out; + + err = grab_mlgroups(md); + if (err < 0) + goto out; + + count = 0; + mdesc_for_each_node_by_name(md, node, "group") { + err = numa_parse_mdesc_group(md, node, count); + if (err < 0) + break; + count++; } + + add_node_ranges(); + + for (i = 0; i < num_node_masks; i++) { + allocate_node_data(i); + node_set_online(i); + } + + err = 0; +out: + mdesc_release(md); + return err; +} + +static int __init numa_parse_sun4u(void) +{ + return -1; +} + +static int __init bootmem_init_numa(void) +{ + int err = -1; + + numadbg("bootmem_init_numa()\n"); + + if (numa_enabled) { + if (tlb_type == hypervisor) + err = numa_parse_mdesc(); + else + err = numa_parse_sun4u(); + } + return err; +} + +#else + +static int bootmem_init_numa(void) +{ + return -1; +} + #endif - /* Reserve the kernel text/data/bss. */ - reserve_bootmem(kern_base, kern_size, BOOTMEM_DEFAULT); - *pages_avail -= PAGE_ALIGN(kern_size) >> PAGE_SHIFT; - - /* Add back in the initmem pages. */ - size = ((unsigned long)(__init_end) & PAGE_MASK) - - PAGE_ALIGN((unsigned long)__init_begin); - *pages_avail += size >> PAGE_SHIFT; - - /* Reserve the bootmem map. We do not account for it - * in pages_avail because we will release that memory - * in free_all_bootmem. - */ - size = bootmap_size; - reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT); - for (i = 0; i < pavail_ents; i++) { +static void __init bootmem_init_nonnuma(void) +{ + unsigned long top_of_ram = lmb_end_of_DRAM(); + unsigned long total_ram = lmb_phys_mem_size(); + unsigned int i; + + numadbg("bootmem_init_nonnuma()\n"); + + printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n", + top_of_ram, total_ram); + printk(KERN_INFO "Memory hole size: %ldMB\n", + (top_of_ram - total_ram) >> 20); + + init_node_masks_nonnuma(); + + for (i = 0; i < lmb.memory.cnt; i++) { + unsigned long size = lmb_size_bytes(&lmb.memory, i); unsigned long start_pfn, end_pfn; - start_pfn = pavail[i].phys_addr >> PAGE_SHIFT; - end_pfn = (start_pfn + (pavail[i].reg_size >> PAGE_SHIFT)); - memory_present(0, start_pfn, end_pfn); + if (!size) + continue; + + start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT; + end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i); + add_active_range(0, start_pfn, end_pfn); } + allocate_node_data(0); + + node_set_online(0); +} + +static void __init reserve_range_in_node(int nid, unsigned long start, + unsigned long end) +{ + numadbg(" reserve_range_in_node(nid[%d],start[%lx],end[%lx]\n", + nid, start, end); + while (start < end) { + unsigned long this_end; + int n; + + this_end = nid_range(start, end, &n); + if (n == nid) { + numadbg(" MATCH reserving range [%lx:%lx]\n", + start, this_end); + reserve_bootmem_node(NODE_DATA(nid), start, + (this_end - start), BOOTMEM_DEFAULT); + } else + numadbg(" NO MATCH, advancing start to %lx\n", + this_end); + + start = this_end; + } +} + +static void __init trim_reserved_in_node(int nid) +{ + int i; + + numadbg(" trim_reserved_in_node(%d)\n", nid); + + for (i = 0; i < lmb.reserved.cnt; i++) { + unsigned long start = lmb.reserved.region[i].base; + unsigned long size = lmb_size_bytes(&lmb.reserved, i); + unsigned long end = start + size; + + reserve_range_in_node(nid, start, end); + } +} + +static void __init bootmem_init_one_node(int nid) +{ + struct pglist_data *p; + + numadbg("bootmem_init_one_node(%d)\n", nid); + + p = NODE_DATA(nid); + + if (p->node_spanned_pages) { + unsigned long paddr = node_masks[nid].bootmem_paddr; + unsigned long end_pfn; + + end_pfn = p->node_start_pfn + p->node_spanned_pages; + + numadbg(" init_bootmem_node(%d, %lx, %lx, %lx)\n", + nid, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn); + + init_bootmem_node(p, paddr >> PAGE_SHIFT, + p->node_start_pfn, end_pfn); + + numadbg(" free_bootmem_with_active_regions(%d, %lx)\n", + nid, end_pfn); + free_bootmem_with_active_regions(nid, end_pfn); + + trim_reserved_in_node(nid); + + numadbg(" sparse_memory_present_with_active_regions(%d)\n", + nid); + sparse_memory_present_with_active_regions(nid); + } +} + +static unsigned long __init bootmem_init(unsigned long phys_base) +{ + unsigned long end_pfn; + int nid; + + end_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT; + max_pfn = max_low_pfn = end_pfn; + min_low_pfn = (phys_base >> PAGE_SHIFT); + + if (bootmem_init_numa() < 0) + bootmem_init_nonnuma(); + + /* XXX cpu notifier XXX */ + + for_each_online_node(nid) + bootmem_init_one_node(nid); + sparse_init(); return end_pfn; @@ -1289,7 +1689,7 @@ void __init setup_per_cpu_areas(void) void __init paging_init(void) { - unsigned long end_pfn, pages_avail, shift, phys_base; + unsigned long end_pfn, shift, phys_base; unsigned long real_end, i; /* These build time checkes make sure that the dcache_dirty_cpu() @@ -1300,9 +1700,21 @@ void __init paging_init(void) * functions like clear_dcache_dirty_cpu use the cpu mask * in 13-bit signed-immediate instruction fields. */ - BUILD_BUG_ON(FLAGS_RESERVED != 32); + + /* + * Page flags must not reach into upper 32 bits that are used + * for the cpu number + */ + BUILD_BUG_ON(NR_PAGEFLAGS > 32); + + /* + * The bit fields placed in the high range must not reach below + * the 32 bit boundary. Otherwise we cannot place the cpu field + * at the 32 bit boundary. + */ BUILD_BUG_ON(SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH + - ilog2(roundup_pow_of_two(NR_CPUS)) > FLAGS_RESERVED); + ilog2(roundup_pow_of_two(NR_CPUS)) > 32); + BUILD_BUG_ON(NR_CPUS > 4096); kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; @@ -1330,12 +1742,26 @@ void __init paging_init(void) sun4v_ktsb_init(); } + lmb_init(); + /* Find available physical memory... */ read_obp_memory("available", &pavail[0], &pavail_ents); phys_base = 0xffffffffffffffffUL; - for (i = 0; i < pavail_ents; i++) + for (i = 0; i < pavail_ents; i++) { phys_base = min(phys_base, pavail[i].phys_addr); + lmb_add(pavail[i].phys_addr, pavail[i].reg_size); + } + + lmb_reserve(kern_base, kern_size); + + find_ramdisk(phys_base); + + if (cmdline_memory_size) + lmb_enforce_memory_limit(phys_base + cmdline_memory_size); + + lmb_analyze(); + lmb_dump_all(); set_bit(0, mmu_context_bmap); @@ -1371,14 +1797,10 @@ void __init paging_init(void) if (tlb_type == hypervisor) sun4v_ktsb_register(); - /* Setup bootmem... */ - pages_avail = 0; - last_valid_pfn = end_pfn = bootmem_init(&pages_avail, phys_base); - - max_mapnr = last_valid_pfn; - - kernel_physical_mapping_init(); - + /* We must setup the per-cpu areas before we pull in the + * PROM and the MDESC. The code there fills in cpu and + * other information into per-cpu data structures. + */ real_setup_per_cpu_areas(); prom_build_devicetree(); @@ -1386,20 +1808,22 @@ void __init paging_init(void) if (tlb_type == hypervisor) sun4v_mdesc_init(); + /* Setup bootmem... */ + last_valid_pfn = end_pfn = bootmem_init(phys_base); + +#ifndef CONFIG_NEED_MULTIPLE_NODES + max_mapnr = last_valid_pfn; +#endif + kernel_physical_mapping_init(); + { - unsigned long zones_size[MAX_NR_ZONES]; - unsigned long zholes_size[MAX_NR_ZONES]; - int znum; + unsigned long max_zone_pfns[MAX_NR_ZONES]; - for (znum = 0; znum < MAX_NR_ZONES; znum++) - zones_size[znum] = zholes_size[znum] = 0; + memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - zones_size[ZONE_NORMAL] = end_pfn; - zholes_size[ZONE_NORMAL] = end_pfn - pages_avail; + max_zone_pfns[ZONE_NORMAL] = end_pfn; - free_area_init_node(0, &contig_page_data, zones_size, - __pa(PAGE_OFFSET) >> PAGE_SHIFT, - zholes_size); + free_area_init_nodes(max_zone_pfns); } printk("Booting Linux...\n"); @@ -1408,21 +1832,52 @@ void __init paging_init(void) cpu_probe(); } -static void __init taint_real_pages(void) +int __init page_in_phys_avail(unsigned long paddr) +{ + int i; + + paddr &= PAGE_MASK; + + for (i = 0; i < pavail_ents; i++) { + unsigned long start, end; + + start = pavail[i].phys_addr; + end = start + pavail[i].reg_size; + + if (paddr >= start && paddr < end) + return 1; + } + if (paddr >= kern_base && paddr < (kern_base + kern_size)) + return 1; +#ifdef CONFIG_BLK_DEV_INITRD + if (paddr >= __pa(initrd_start) && + paddr < __pa(PAGE_ALIGN(initrd_end))) + return 1; +#endif + + return 0; +} + +static struct linux_prom64_registers pavail_rescan[MAX_BANKS] __initdata; +static int pavail_rescan_ents __initdata; + +/* Certain OBP calls, such as fetching "available" properties, can + * claim physical memory. So, along with initializing the valid + * address bitmap, what we do here is refetch the physical available + * memory list again, and make sure it provides at least as much + * memory as 'pavail' does. + */ +static void setup_valid_addr_bitmap_from_pavail(void) { int i; read_obp_memory("available", &pavail_rescan[0], &pavail_rescan_ents); - /* Find changes discovered in the physmem available rescan and - * reserve the lost portions in the bootmem maps. - */ for (i = 0; i < pavail_ents; i++) { unsigned long old_start, old_end; old_start = pavail[i].phys_addr; - old_end = old_start + - pavail[i].reg_size; + old_end = old_start + pavail[i].reg_size; while (old_start < old_end) { int n; @@ -1440,7 +1895,16 @@ static void __init taint_real_pages(void) goto do_next_page; } } - reserve_bootmem(old_start, PAGE_SIZE, BOOTMEM_DEFAULT); + + prom_printf("mem_init: Lost memory in pavail\n"); + prom_printf("mem_init: OLD start[%lx] size[%lx]\n", + pavail[i].phys_addr, + pavail[i].reg_size); + prom_printf("mem_init: NEW start[%lx] size[%lx]\n", + pavail_rescan[i].phys_addr, + pavail_rescan[i].reg_size); + prom_printf("mem_init: Cannot continue, aborting.\n"); + prom_halt(); do_next_page: old_start += PAGE_SIZE; @@ -1448,32 +1912,6 @@ static void __init taint_real_pages(void) } } -int __init page_in_phys_avail(unsigned long paddr) -{ - int i; - - paddr &= PAGE_MASK; - - for (i = 0; i < pavail_rescan_ents; i++) { - unsigned long start, end; - - start = pavail_rescan[i].phys_addr; - end = start + pavail_rescan[i].reg_size; - - if (paddr >= start && paddr < end) - return 1; - } - if (paddr >= kern_base && paddr < (kern_base + kern_size)) - return 1; -#ifdef CONFIG_BLK_DEV_INITRD - if (paddr >= __pa(initrd_start) && - paddr < __pa(PAGE_ALIGN(initrd_end))) - return 1; -#endif - - return 0; -} - void __init mem_init(void) { unsigned long codepages, datapages, initpages; @@ -1496,14 +1934,26 @@ void __init mem_init(void) addr += PAGE_SIZE; } - taint_real_pages(); + setup_valid_addr_bitmap_from_pavail(); high_memory = __va(last_valid_pfn << PAGE_SHIFT); +#ifdef CONFIG_NEED_MULTIPLE_NODES + for_each_online_node(i) { + if (NODE_DATA(i)->node_spanned_pages != 0) { + totalram_pages += + free_all_bootmem_node(NODE_DATA(i)); + } + } +#else + totalram_pages = free_all_bootmem(); +#endif + /* We subtract one to account for the mem_map_zero page * allocated below. */ - totalram_pages = num_physpages = free_all_bootmem() - 1; + totalram_pages -= 1; + num_physpages = totalram_pages; /* * Set up the zero page, mark it reserved, so that page count |