forked from Minki/linux
[SPARC64]: Move over to sparsemem.
This has been pending for a long time, and the fact that we waste a ton of ram on some configurations kind of pushed things over the edge. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
ee29074d3b
commit
d1112018b4
@ -186,6 +186,12 @@ endchoice
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endmenu
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config ARCH_SPARSEMEM_ENABLE
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def_bool y
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config ARCH_SPARSEMEM_DEFAULT
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def_bool y
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source "mm/Kconfig"
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config GENERIC_ISA_DMA
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@ -95,9 +95,6 @@ extern int __ashrdi3(int, int);
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extern int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs);
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extern unsigned long phys_base;
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extern unsigned long pfn_base;
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extern unsigned int sys_call_table[];
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extern void xor_vis_2(unsigned long, unsigned long *, unsigned long *);
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@ -346,11 +343,7 @@ EXPORT_SYMBOL(__strncpy_from_user);
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EXPORT_SYMBOL(__clear_user);
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/* Various address conversion macros use this. */
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EXPORT_SYMBOL(phys_base);
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EXPORT_SYMBOL(pfn_base);
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EXPORT_SYMBOL(sparc64_valid_addr_bitmap);
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EXPORT_SYMBOL(page_to_pfn);
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EXPORT_SYMBOL(pfn_to_page);
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/* No version information on this, heavily used in inline asm,
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* and will always be 'void __ret_efault(void)'.
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@ -130,11 +130,9 @@ static void __init read_obp_memory(const char *property,
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unsigned long *sparc64_valid_addr_bitmap __read_mostly;
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/* Ugly, but necessary... -DaveM */
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unsigned long phys_base __read_mostly;
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/* Kernel physical address base and size in bytes. */
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unsigned long kern_base __read_mostly;
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unsigned long kern_size __read_mostly;
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unsigned long pfn_base __read_mostly;
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/* get_new_mmu_context() uses "cache + 1". */
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DEFINE_SPINLOCK(ctx_alloc_lock);
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@ -368,16 +366,6 @@ void __kprobes flush_icache_range(unsigned long start, unsigned long end)
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}
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}
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unsigned long page_to_pfn(struct page *page)
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{
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return (unsigned long) ((page - mem_map) + pfn_base);
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}
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struct page *pfn_to_page(unsigned long pfn)
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{
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return (mem_map + (pfn - pfn_base));
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}
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void show_mem(void)
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{
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printk("Mem-info:\n");
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@ -773,9 +761,78 @@ void sparc_ultra_dump_dtlb(void)
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extern unsigned long cmdline_memory_size;
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unsigned long __init bootmem_init(unsigned long *pages_avail)
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/* Find a free area for the bootmem map, avoiding the kernel image
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* and the initial ramdisk.
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*/
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static unsigned long __init choose_bootmap_pfn(unsigned long start_pfn,
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unsigned long end_pfn)
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{
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unsigned long bootmap_size, start_pfn, end_pfn;
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unsigned long avoid_start, avoid_end, bootmap_size;
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int i;
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bootmap_size = ((end_pfn - start_pfn) + 7) / 8;
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bootmap_size = ALIGN(bootmap_size, sizeof(long));
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avoid_start = avoid_end = 0;
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#ifdef CONFIG_BLK_DEV_INITRD
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avoid_start = initrd_start;
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avoid_end = PAGE_ALIGN(initrd_end);
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#endif
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#ifdef CONFIG_DEBUG_BOOTMEM
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prom_printf("choose_bootmap_pfn: kern[%lx:%lx] avoid[%lx:%lx]\n",
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kern_base, PAGE_ALIGN(kern_base + kern_size),
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avoid_start, avoid_end);
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#endif
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for (i = 0; i < pavail_ents; i++) {
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unsigned long start, end;
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start = pavail[i].phys_addr;
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end = start + pavail[i].reg_size;
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while (start < end) {
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if (start >= kern_base &&
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start < PAGE_ALIGN(kern_base + kern_size)) {
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start = PAGE_ALIGN(kern_base + kern_size);
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continue;
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}
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if (start >= avoid_start && start < avoid_end) {
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start = avoid_end;
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continue;
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}
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if ((end - start) < bootmap_size)
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break;
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if (start < kern_base &&
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(start + bootmap_size) > kern_base) {
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start = PAGE_ALIGN(kern_base + kern_size);
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continue;
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}
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if (start < avoid_start &&
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(start + bootmap_size) > avoid_start) {
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start = avoid_end;
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continue;
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}
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/* OK, it doesn't overlap anything, use it. */
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#ifdef CONFIG_DEBUG_BOOTMEM
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prom_printf("choose_bootmap_pfn: Using %lx [%lx]\n",
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start >> PAGE_SHIFT, start);
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#endif
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return start >> PAGE_SHIFT;
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}
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}
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prom_printf("Cannot find free area for bootmap, aborting.\n");
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prom_halt();
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}
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static unsigned long __init bootmem_init(unsigned long *pages_avail,
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unsigned long phys_base)
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{
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unsigned long bootmap_size, end_pfn;
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unsigned long end_of_phys_memory = 0UL;
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unsigned long bootmap_pfn, bytes_avail, size;
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int i;
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@ -813,14 +870,6 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
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*pages_avail = bytes_avail >> PAGE_SHIFT;
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/* Start with page aligned address of last symbol in kernel
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* image. The kernel is hard mapped below PAGE_OFFSET in a
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* 4MB locked TLB translation.
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*/
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start_pfn = PAGE_ALIGN(kern_base + kern_size) >> PAGE_SHIFT;
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bootmap_pfn = start_pfn;
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end_pfn = end_of_phys_memory >> PAGE_SHIFT;
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#ifdef CONFIG_BLK_DEV_INITRD
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@ -837,23 +886,23 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
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"(0x%016lx > 0x%016lx)\ndisabling initrd\n",
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initrd_end, end_of_phys_memory);
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initrd_start = 0;
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}
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if (initrd_start) {
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if (initrd_start >= (start_pfn << PAGE_SHIFT) &&
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initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE)
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bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT;
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initrd_end = 0;
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}
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}
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#endif
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/* Initialize the boot-time allocator. */
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max_pfn = max_low_pfn = end_pfn;
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min_low_pfn = pfn_base;
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min_low_pfn = (phys_base >> PAGE_SHIFT);
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bootmap_pfn = choose_bootmap_pfn(min_low_pfn, end_pfn);
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#ifdef CONFIG_DEBUG_BOOTMEM
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prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n",
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min_low_pfn, bootmap_pfn, max_low_pfn);
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#endif
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bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base, end_pfn);
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bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn,
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(phys_base >> PAGE_SHIFT),
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end_pfn);
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/* Now register the available physical memory with the
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* allocator.
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@ -901,6 +950,20 @@ unsigned long __init bootmem_init(unsigned long *pages_avail)
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reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size);
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*pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
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for (i = 0; i < pavail_ents; i++) {
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unsigned long start_pfn, end_pfn;
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start_pfn = pavail[i].phys_addr >> PAGE_SHIFT;
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end_pfn = (start_pfn + (pavail[i].reg_size >> PAGE_SHIFT));
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#ifdef CONFIG_DEBUG_BOOTMEM
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prom_printf("memory_present(0, %lx, %lx)\n",
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start_pfn, end_pfn);
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#endif
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memory_present(0, start_pfn, end_pfn);
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}
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sparse_init();
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return end_pfn;
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}
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@ -1180,7 +1243,7 @@ static void sun4v_pgprot_init(void);
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void __init paging_init(void)
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{
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unsigned long end_pfn, pages_avail, shift;
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unsigned long end_pfn, pages_avail, shift, phys_base;
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unsigned long real_end, i;
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kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL;
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@ -1211,8 +1274,6 @@ void __init paging_init(void)
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for (i = 0; i < pavail_ents; i++)
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phys_base = min(phys_base, pavail[i].phys_addr);
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pfn_base = phys_base >> PAGE_SHIFT;
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set_bit(0, mmu_context_bmap);
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shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE);
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@ -1248,7 +1309,9 @@ void __init paging_init(void)
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/* Setup bootmem... */
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pages_avail = 0;
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last_valid_pfn = end_pfn = bootmem_init(&pages_avail);
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last_valid_pfn = end_pfn = bootmem_init(&pages_avail, phys_base);
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max_mapnr = last_valid_pfn - (phys_base >> PAGE_SHIFT);
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kernel_physical_mapping_init();
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@ -1261,7 +1324,7 @@ void __init paging_init(void)
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for (znum = 0; znum < MAX_NR_ZONES; znum++)
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zones_size[znum] = zholes_size[znum] = 0;
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npages = end_pfn - pfn_base;
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npages = end_pfn - (phys_base >> PAGE_SHIFT);
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zones_size[ZONE_DMA] = npages;
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zholes_size[ZONE_DMA] = npages - pages_avail;
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@ -1336,7 +1399,6 @@ void __init mem_init(void)
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taint_real_pages();
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max_mapnr = last_valid_pfn - pfn_base;
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high_memory = __va(last_valid_pfn << PAGE_SHIFT);
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#ifdef CONFIG_DEBUG_BOOTMEM
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6
include/asm-sparc64/numnodes.h
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6
include/asm-sparc64/numnodes.h
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@ -0,0 +1,6 @@
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#ifndef _SPARC64_NUMNODES_H
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#define _SPARC64_NUMNODES_H
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#define NODES_SHIFT 0
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#endif /* !(_SPARC64_NUMNODES_H) */
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@ -125,17 +125,10 @@ typedef unsigned long pgprot_t;
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#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
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#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
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/* PFNs are real physical page numbers. However, mem_map only begins to record
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* per-page information starting at pfn_base. This is to handle systems where
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* the first physical page in the machine is at some huge physical address,
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* such as 4GB. This is common on a partitioned E10000, for example.
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*/
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extern struct page *pfn_to_page(unsigned long pfn);
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extern unsigned long page_to_pfn(struct page *);
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
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#define pfn_valid(pfn) (((pfn)-(pfn_base)) < max_mapnr)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_to_phys __pa
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@ -217,9 +217,6 @@ extern unsigned long pg_iobits;
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extern unsigned long _PAGE_ALL_SZ_BITS;
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extern unsigned long _PAGE_SZBITS;
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extern unsigned long phys_base;
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extern unsigned long pfn_base;
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extern struct page *mem_map_zero;
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#define ZERO_PAGE(vaddr) (mem_map_zero)
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12
include/asm-sparc64/sparsemem.h
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12
include/asm-sparc64/sparsemem.h
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@ -0,0 +1,12 @@
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#ifndef _SPARC64_SPARSEMEM_H
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#define _SPARC64_SPARSEMEM_H
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#ifdef __KERNEL__
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#define SECTION_SIZE_BITS 26
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#define MAX_PHYSADDR_BITS 42
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#define MAX_PHYSMEM_BITS 42
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#endif /* !(__KERNEL__) */
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#endif /* !(_SPARC64_SPARSEMEM_H) */
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