diff options
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 1678 |
1 files changed, 0 insertions, 1678 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c deleted file mode 100644 index 1e44ee26cee..00000000000 --- a/arch/sparc64/mm/init.c +++ /dev/null @@ -1,1678 +0,0 @@ -/* $Id: init.c,v 1.209 2002/02/09 19:49:31 davem Exp $ - * arch/sparc64/mm/init.c - * - * Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu) - * Copyright (C) 1997-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz) - */ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <linux/mm.h> -#include <linux/hugetlb.h> -#include <linux/slab.h> -#include <linux/initrd.h> -#include <linux/swap.h> -#include <linux/pagemap.h> -#include <linux/fs.h> -#include <linux/seq_file.h> -#include <linux/kprobes.h> -#include <linux/cache.h> -#include <linux/sort.h> - -#include <asm/head.h> -#include <asm/system.h> -#include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/pgtable.h> -#include <asm/oplib.h> -#include <asm/iommu.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/mmu_context.h> -#include <asm/tlbflush.h> -#include <asm/dma.h> -#include <asm/starfire.h> -#include <asm/tlb.h> -#include <asm/spitfire.h> -#include <asm/sections.h> - -extern void device_scan(void); - -#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) -{ - const struct linux_prom64_registers *x = a, *y = b; - - if (x->phys_addr > y->phys_addr) - return 1; - if (x->phys_addr < y->phys_addr) - return -1; - return 0; -} - -static void __init read_obp_memory(const char *property, - struct linux_prom64_registers *regs, - int *num_ents) -{ - int node = prom_finddevice("/memory"); - int prop_size = prom_getproplen(node, property); - int ents, ret, i; - - ents = prop_size / sizeof(struct linux_prom64_registers); - if (ents > MAX_BANKS) { - prom_printf("The machine has more %s property entries than " - "this kernel can support (%d).\n", - property, MAX_BANKS); - prom_halt(); - } - - ret = prom_getproperty(node, property, (char *) regs, prop_size); - if (ret == -1) { - prom_printf("Couldn't get %s property from /memory.\n"); - prom_halt(); - } - - *num_ents = ents; - - /* Sanitize what we got from the firmware, by page aligning - * everything. - */ - for (i = 0; i < ents; i++) { - unsigned long base, size; - - base = regs[i].phys_addr; - size = regs[i].reg_size; - - size &= PAGE_MASK; - if (base & ~PAGE_MASK) { - unsigned long new_base = PAGE_ALIGN(base); - - size -= new_base - base; - if ((long) size < 0L) - size = 0UL; - base = new_base; - } - regs[i].phys_addr = base; - regs[i].reg_size = size; - } - sort(regs, ents, sizeof(struct linux_prom64_registers), - cmp_p64, NULL); -} - -unsigned long *sparc64_valid_addr_bitmap __read_mostly; - -/* Ugly, but necessary... -DaveM */ -unsigned long phys_base __read_mostly; -unsigned long kern_base __read_mostly; -unsigned long kern_size __read_mostly; -unsigned long pfn_base __read_mostly; - -/* get_new_mmu_context() uses "cache + 1". */ -DEFINE_SPINLOCK(ctx_alloc_lock); -unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1; -#define CTX_BMAP_SLOTS (1UL << (CTX_NR_BITS - 6)) -unsigned long mmu_context_bmap[CTX_BMAP_SLOTS]; - -/* References to special section boundaries */ -extern char _start[], _end[]; - -/* Initial ramdisk setup */ -extern unsigned long sparc_ramdisk_image64; -extern unsigned int sparc_ramdisk_image; -extern unsigned int sparc_ramdisk_size; - -struct page *mem_map_zero __read_mostly; - -unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly; - -unsigned long sparc64_kern_pri_context __read_mostly; -unsigned long sparc64_kern_pri_nuc_bits __read_mostly; -unsigned long sparc64_kern_sec_context __read_mostly; - -int bigkernel = 0; - -/* XXX Tune this... */ -#define PGT_CACHE_LOW 25 -#define PGT_CACHE_HIGH 50 - -void check_pgt_cache(void) -{ - preempt_disable(); - if (pgtable_cache_size > PGT_CACHE_HIGH) { - do { - if (pgd_quicklist) - free_pgd_slow(get_pgd_fast()); - if (pte_quicklist[0]) - free_pte_slow(pte_alloc_one_fast(NULL, 0)); - if (pte_quicklist[1]) - free_pte_slow(pte_alloc_one_fast(NULL, 1 << (PAGE_SHIFT + 10))); - } while (pgtable_cache_size > PGT_CACHE_LOW); - } - preempt_enable(); -} - -#ifdef CONFIG_DEBUG_DCFLUSH -atomic_t dcpage_flushes = ATOMIC_INIT(0); -#ifdef CONFIG_SMP -atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0); -#endif -#endif - -__inline__ void flush_dcache_page_impl(struct page *page) -{ -#ifdef CONFIG_DEBUG_DCFLUSH - atomic_inc(&dcpage_flushes); -#endif - -#ifdef DCACHE_ALIASING_POSSIBLE - __flush_dcache_page(page_address(page), - ((tlb_type == spitfire) && - page_mapping(page) != NULL)); -#else - if (page_mapping(page) != NULL && - tlb_type == spitfire) - __flush_icache_page(__pa(page_address(page))); -#endif -} - -#define PG_dcache_dirty PG_arch_1 -#define PG_dcache_cpu_shift 24 -#define PG_dcache_cpu_mask (256 - 1) - -#if NR_CPUS > 256 -#error D-cache dirty tracking and thread_info->cpu need fixing for > 256 cpus -#endif - -#define dcache_dirty_cpu(page) \ - (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask) - -static __inline__ void set_dcache_dirty(struct page *page, int this_cpu) -{ - unsigned long mask = this_cpu; - unsigned long non_cpu_bits; - - non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift); - mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty); - - __asm__ __volatile__("1:\n\t" - "ldx [%2], %%g7\n\t" - "and %%g7, %1, %%g1\n\t" - "or %%g1, %0, %%g1\n\t" - "casx [%2], %%g7, %%g1\n\t" - "cmp %%g7, %%g1\n\t" - "membar #StoreLoad | #StoreStore\n\t" - "bne,pn %%xcc, 1b\n\t" - " nop" - : /* no outputs */ - : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags) - : "g1", "g7"); -} - -static __inline__ void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu) -{ - unsigned long mask = (1UL << PG_dcache_dirty); - - __asm__ __volatile__("! test_and_clear_dcache_dirty\n" - "1:\n\t" - "ldx [%2], %%g7\n\t" - "srlx %%g7, %4, %%g1\n\t" - "and %%g1, %3, %%g1\n\t" - "cmp %%g1, %0\n\t" - "bne,pn %%icc, 2f\n\t" - " andn %%g7, %1, %%g1\n\t" - "casx [%2], %%g7, %%g1\n\t" - "cmp %%g7, %%g1\n\t" - "membar #StoreLoad | #StoreStore\n\t" - "bne,pn %%xcc, 1b\n\t" - " nop\n" - "2:" - : /* no outputs */ - : "r" (cpu), "r" (mask), "r" (&page->flags), - "i" (PG_dcache_cpu_mask), - "i" (PG_dcache_cpu_shift) - : "g1", "g7"); -} - -void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) -{ - struct page *page; - unsigned long pfn; - unsigned long pg_flags; - - pfn = pte_pfn(pte); - if (pfn_valid(pfn) && - (page = pfn_to_page(pfn), page_mapping(page)) && - ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) { - int cpu = ((pg_flags >> PG_dcache_cpu_shift) & - PG_dcache_cpu_mask); - int this_cpu = get_cpu(); - - /* This is just to optimize away some function calls - * in the SMP case. - */ - if (cpu == this_cpu) - flush_dcache_page_impl(page); - else - smp_flush_dcache_page_impl(page, cpu); - - clear_dcache_dirty_cpu(page, cpu); - - put_cpu(); - } -} - -void flush_dcache_page(struct page *page) -{ - struct address_space *mapping; - int this_cpu; - - /* Do not bother with the expensive D-cache flush if it - * is merely the zero page. The 'bigcore' testcase in GDB - * causes this case to run millions of times. - */ - if (page == ZERO_PAGE(0)) - return; - - this_cpu = get_cpu(); - - mapping = page_mapping(page); - if (mapping && !mapping_mapped(mapping)) { - int dirty = test_bit(PG_dcache_dirty, &page->flags); - if (dirty) { - int dirty_cpu = dcache_dirty_cpu(page); - - if (dirty_cpu == this_cpu) - goto out; - smp_flush_dcache_page_impl(page, dirty_cpu); - } - set_dcache_dirty(page, this_cpu); - } else { - /* We could delay the flush for the !page_mapping - * case too. But that case is for exec env/arg - * pages and those are %99 certainly going to get - * faulted into the tlb (and thus flushed) anyways. - */ - flush_dcache_page_impl(page); - } - -out: - put_cpu(); -} - -void __kprobes flush_icache_range(unsigned long start, unsigned long end) -{ - /* Cheetah has coherent I-cache. */ - if (tlb_type == spitfire) { - unsigned long kaddr; - - for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) - __flush_icache_page(__get_phys(kaddr)); - } -} - -unsigned long page_to_pfn(struct page *page) -{ - return (unsigned long) ((page - mem_map) + pfn_base); -} - -struct page *pfn_to_page(unsigned long pfn) -{ - return (mem_map + (pfn - pfn_base)); -} - -void show_mem(void) -{ - printk("Mem-info:\n"); - show_free_areas(); - printk("Free swap: %6ldkB\n", - nr_swap_pages << (PAGE_SHIFT-10)); - printk("%ld pages of RAM\n", num_physpages); - printk("%d free pages\n", nr_free_pages()); - printk("%d pages in page table cache\n",pgtable_cache_size); -} - -void mmu_info(struct seq_file *m) -{ - if (tlb_type == cheetah) - seq_printf(m, "MMU Type\t: Cheetah\n"); - else if (tlb_type == cheetah_plus) - seq_printf(m, "MMU Type\t: Cheetah+\n"); - else if (tlb_type == spitfire) - seq_printf(m, "MMU Type\t: Spitfire\n"); - else - seq_printf(m, "MMU Type\t: ???\n"); - -#ifdef CONFIG_DEBUG_DCFLUSH - seq_printf(m, "DCPageFlushes\t: %d\n", - atomic_read(&dcpage_flushes)); -#ifdef CONFIG_SMP - seq_printf(m, "DCPageFlushesXC\t: %d\n", - atomic_read(&dcpage_flushes_xcall)); -#endif /* CONFIG_SMP */ -#endif /* CONFIG_DEBUG_DCFLUSH */ -} - -struct linux_prom_translation { - unsigned long virt; - unsigned long size; - unsigned long data; -}; - -/* Exported for kernel TLB miss handling in ktlb.S */ -struct linux_prom_translation prom_trans[512] __read_mostly; -unsigned int prom_trans_ents __read_mostly; -unsigned int swapper_pgd_zero __read_mostly; - -extern unsigned long prom_boot_page; -extern void prom_remap(unsigned long physpage, unsigned long virtpage, int mmu_ihandle); -extern int prom_get_mmu_ihandle(void); -extern void register_prom_callbacks(void); - -/* Exported for SMP bootup purposes. */ -unsigned long kern_locked_tte_data; - -/* - * Translate PROM's mapping we capture at boot time into physical address. - * The second parameter is only set from prom_callback() invocations. - */ -unsigned long prom_virt_to_phys(unsigned long promva, int *error) -{ - int i; - - for (i = 0; i < prom_trans_ents; i++) { - struct linux_prom_translation *p = &prom_trans[i]; - - if (promva >= p->virt && - promva < (p->virt + p->size)) { - unsigned long base = p->data & _PAGE_PADDR; - - if (error) - *error = 0; - return base + (promva & (8192 - 1)); - } - } - if (error) - *error = 1; - return 0UL; -} - -/* The obp translations are saved based on 8k pagesize, since obp can - * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS -> - * HI_OBP_ADDRESS range are handled in ktlb.S and do not use the vpte - * scheme (also, see rant in inherit_locked_prom_mappings()). - */ -static inline int in_obp_range(unsigned long vaddr) -{ - return (vaddr >= LOW_OBP_ADDRESS && - vaddr < HI_OBP_ADDRESS); -} - -static int cmp_ptrans(const void *a, const void *b) -{ - const struct linux_prom_translation *x = a, *y = b; - - if (x->virt > y->virt) - return 1; - if (x->virt < y->virt) - return -1; - return 0; -} - -/* Read OBP translations property into 'prom_trans[]'. */ -static void __init read_obp_translations(void) -{ - int n, node, ents, first, last, i; - - node = prom_finddevice("/virtual-memory"); - n = prom_getproplen(node, "translations"); - if (unlikely(n == 0 || n == -1)) { - prom_printf("prom_mappings: Couldn't get size.\n"); - prom_halt(); - } - if (unlikely(n > sizeof(prom_trans))) { - prom_printf("prom_mappings: Size %Zd is too big.\n", n); - prom_halt(); - } - - if ((n = prom_getproperty(node, "translations", - (char *)&prom_trans[0], - sizeof(prom_trans))) == -1) { - prom_printf("prom_mappings: Couldn't get property.\n"); - prom_halt(); - } - - n = n / sizeof(struct linux_prom_translation); - - ents = n; - - sort(prom_trans, ents, sizeof(struct linux_prom_translation), - cmp_ptrans, NULL); - - /* Now kick out all the non-OBP entries. */ - for (i = 0; i < ents; i++) { - if (in_obp_range(prom_trans[i].virt)) - break; - } - first = i; - for (; i < ents; i++) { - if (!in_obp_range(prom_trans[i].virt)) - break; - } - last = i; - - for (i = 0; i < (last - first); i++) { - struct linux_prom_translation *src = &prom_trans[i + first]; - struct linux_prom_translation *dest = &prom_trans[i]; - - *dest = *src; - } - for (; i < ents; i++) { - struct linux_prom_translation *dest = &prom_trans[i]; - dest->virt = dest->size = dest->data = 0x0UL; - } - - prom_trans_ents = last - first; - - if (tlb_type == spitfire) { - /* Clear diag TTE bits. */ - for (i = 0; i < prom_trans_ents; i++) - prom_trans[i].data &= ~0x0003fe0000000000UL; - } -} - -static void __init remap_kernel(void) -{ - unsigned long phys_page, tte_vaddr, tte_data; - int tlb_ent = sparc64_highest_locked_tlbent(); - - tte_vaddr = (unsigned long) KERNBASE; - phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL; - tte_data = (phys_page | (_PAGE_VALID | _PAGE_SZ4MB | - _PAGE_CP | _PAGE_CV | _PAGE_P | - _PAGE_L | _PAGE_W)); - - kern_locked_tte_data = tte_data; - - /* Now lock us into the TLBs via OBP. */ - prom_dtlb_load(tlb_ent, tte_data, tte_vaddr); - prom_itlb_load(tlb_ent, tte_data, tte_vaddr); - if (bigkernel) { - tlb_ent -= 1; - prom_dtlb_load(tlb_ent, - tte_data + 0x400000, - tte_vaddr + 0x400000); - prom_itlb_load(tlb_ent, - tte_data + 0x400000, - tte_vaddr + 0x400000); - } - sparc64_highest_unlocked_tlb_ent = tlb_ent - 1; - if (tlb_type == cheetah_plus) { - sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 | - CTX_CHEETAH_PLUS_NUC); - sparc64_kern_pri_nuc_bits = CTX_CHEETAH_PLUS_NUC; - sparc64_kern_sec_context = CTX_CHEETAH_PLUS_CTX0; - } -} - - -static void __init inherit_prom_mappings(void) -{ - read_obp_translations(); - - /* Now fixup OBP's idea about where we really are mapped. */ - prom_printf("Remapping the kernel... "); - remap_kernel(); - prom_printf("done.\n"); - - prom_printf("Registering callbacks... "); - register_prom_callbacks(); - prom_printf("done.\n"); -} - -/* The OBP specifications for sun4u mark 0xfffffffc00000000 and - * upwards as reserved for use by the firmware (I wonder if this - * will be the same on Cheetah...). We use this virtual address - * range for the VPTE table mappings of the nucleus so we need - * to zap them when we enter the PROM. -DaveM - */ -static void __flush_nucleus_vptes(void) -{ - unsigned long prom_reserved_base = 0xfffffffc00000000UL; - int i; - - /* Only DTLB must be checked for VPTE entries. */ - if (tlb_type == spitfire) { - for (i = 0; i < 63; i++) { - unsigned long tag; - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no cheetah+ - * page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - tag = spitfire_get_dtlb_tag(i); - if (((tag & ~(PAGE_MASK)) == 0) && - ((tag & (PAGE_MASK)) >= prom_reserved_base)) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - spitfire_put_dtlb_data(i, 0x0UL); - } - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - for (i = 0; i < 512; i++) { - unsigned long tag = cheetah_get_dtlb_tag(i, 2); - - if ((tag & ~PAGE_MASK) == 0 && - (tag & PAGE_MASK) >= prom_reserved_base) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - cheetah_put_dtlb_data(i, 0x0UL, 2); - } - - if (tlb_type != cheetah_plus) - continue; - - tag = cheetah_get_dtlb_tag(i, 3); - - if ((tag & ~PAGE_MASK) == 0 && - (tag & PAGE_MASK) >= prom_reserved_base) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - cheetah_put_dtlb_data(i, 0x0UL, 3); - } - } - } else { - /* Implement me :-) */ - BUG(); - } -} - -static int prom_ditlb_set; -struct prom_tlb_entry { - int tlb_ent; - unsigned long tlb_tag; - unsigned long tlb_data; -}; -struct prom_tlb_entry prom_itlb[16], prom_dtlb[16]; - -void prom_world(int enter) -{ - unsigned long pstate; - int i; - - if (!enter) - set_fs((mm_segment_t) { get_thread_current_ds() }); - - if (!prom_ditlb_set) - return; - - /* Make sure the following runs atomically. */ - __asm__ __volatile__("flushw\n\t" - "rdpr %%pstate, %0\n\t" - "wrpr %0, %1, %%pstate" - : "=r" (pstate) - : "i" (PSTATE_IE)); - - if (enter) { - /* Kick out nucleus VPTEs. */ - __flush_nucleus_vptes(); - - /* Install PROM world. */ - for (i = 0; i < 16; i++) { - if (prom_dtlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "membar #Sync" - : : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS), - "i" (ASI_DMMU)); - if (tlb_type == spitfire) - spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, - prom_dtlb[i].tlb_data); - else if (tlb_type == cheetah || tlb_type == cheetah_plus) - cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, - prom_dtlb[i].tlb_data); - } - if (prom_itlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "membar #Sync" - : : "r" (prom_itlb[i].tlb_tag), - "r" (TLB_TAG_ACCESS), - "i" (ASI_IMMU)); - if (tlb_type == spitfire) - spitfire_put_itlb_data(prom_itlb[i].tlb_ent, - prom_itlb[i].tlb_data); - else if (tlb_type == cheetah || tlb_type == cheetah_plus) - cheetah_put_litlb_data(prom_itlb[i].tlb_ent, - prom_itlb[i].tlb_data); - } - } - } else { - for (i = 0; i < 16; i++) { - if (prom_dtlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - if (tlb_type == spitfire) - spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, 0x0UL); - else - cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, 0x0UL); - } - if (prom_itlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), - "i" (ASI_IMMU)); - if (tlb_type == spitfire) - spitfire_put_itlb_data(prom_itlb[i].tlb_ent, 0x0UL); - else - cheetah_put_litlb_data(prom_itlb[i].tlb_ent, 0x0UL); - } - } - } - __asm__ __volatile__("wrpr %0, 0, %%pstate" - : : "r" (pstate)); -} - -void inherit_locked_prom_mappings(int save_p) -{ - int i; - int dtlb_seen = 0; - int itlb_seen = 0; - - /* Fucking losing PROM has more mappings in the TLB, but - * it (conveniently) fails to mention any of these in the - * translations property. The only ones that matter are - * the locked PROM tlb entries, so we impose the following - * irrecovable rule on the PROM, it is allowed 8 locked - * entries in the ITLB and 8 in the DTLB. - * - * Supposedly the upper 16GB of the address space is - * reserved for OBP, BUT I WISH THIS WAS DOCUMENTED - * SOMEWHERE!!!!!!!!!!!!!!!!! Furthermore the entire interface - * used between the client program and the firmware on sun5 - * systems to coordinate mmu mappings is also COMPLETELY - * UNDOCUMENTED!!!!!! Thanks S(t)un! - */ - if (save_p) { - for (i = 0; i < 16; i++) { - prom_itlb[i].tlb_ent = -1; - prom_dtlb[i].tlb_ent = -1; - } - } - if (tlb_type == spitfire) { - int high = sparc64_highest_unlocked_tlb_ent; - for (i = 0; i <= high; i++) { - unsigned long data; - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no cheetah+ - * page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - data = spitfire_get_dtlb_data(i); - if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { - unsigned long tag; - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - tag = spitfire_get_dtlb_tag(i); - if (save_p) { - prom_dtlb[dtlb_seen].tlb_ent = i; - prom_dtlb[dtlb_seen].tlb_tag = tag; - prom_dtlb[dtlb_seen].tlb_data = data; - } - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - spitfire_put_dtlb_data(i, 0x0UL); - - dtlb_seen++; - if (dtlb_seen > 15) - break; - } - } - - for (i = 0; i < high; i++) { - unsigned long data; - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - data = spitfire_get_itlb_data(i); - if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { - unsigned long tag; - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - tag = spitfire_get_itlb_tag(i); - if (save_p) { - prom_itlb[itlb_seen].tlb_ent = i; - prom_itlb[itlb_seen].tlb_tag = tag; - prom_itlb[itlb_seen].tlb_data = data; - } - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); - spitfire_put_itlb_data(i, 0x0UL); - - itlb_seen++; - if (itlb_seen > 15) - break; - } - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - int high = sparc64_highest_unlocked_tlb_ent; - - for (i = 0; i <= high; i++) { - unsigned long data; - - data = cheetah_get_ldtlb_data(i); - if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { - unsigned long tag; - - tag = cheetah_get_ldtlb_tag(i); - if (save_p) { - prom_dtlb[dtlb_seen].tlb_ent = i; - prom_dtlb[dtlb_seen].tlb_tag = tag; - prom_dtlb[dtlb_seen].tlb_data = data; - } - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - cheetah_put_ldtlb_data(i, 0x0UL); - - dtlb_seen++; - if (dtlb_seen > 15) - break; - } - } - - for (i = 0; i < high; i++) { - unsigned long data; - - data = cheetah_get_litlb_data(i); - if ((data & (_PAGE_L|_PAGE_VALID)) == (_PAGE_L|_PAGE_VALID)) { - unsigned long tag; - - tag = cheetah_get_litlb_tag(i); - if (save_p) { - prom_itlb[itlb_seen].tlb_ent = i; - prom_itlb[itlb_seen].tlb_tag = tag; - prom_itlb[itlb_seen].tlb_data = data; - } - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); - cheetah_put_litlb_data(i, 0x0UL); - - itlb_seen++; - if (itlb_seen > 15) - break; - } - } - } else { - /* Implement me :-) */ - BUG(); - } - if (save_p) - prom_ditlb_set = 1; -} - -/* Give PROM back his world, done during reboots... */ -void prom_reload_locked(void) -{ - int i; - - for (i = 0; i < 16; i++) { - if (prom_dtlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "membar #Sync" - : : "r" (prom_dtlb[i].tlb_tag), "r" (TLB_TAG_ACCESS), - "i" (ASI_DMMU)); - if (tlb_type == spitfire) - spitfire_put_dtlb_data(prom_dtlb[i].tlb_ent, - prom_dtlb[i].tlb_data); - else if (tlb_type == cheetah || tlb_type == cheetah_plus) - cheetah_put_ldtlb_data(prom_dtlb[i].tlb_ent, - prom_dtlb[i].tlb_data); - } - - if (prom_itlb[i].tlb_ent != -1) { - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "membar #Sync" - : : "r" (prom_itlb[i].tlb_tag), - "r" (TLB_TAG_ACCESS), - "i" (ASI_IMMU)); - if (tlb_type == spitfire) - spitfire_put_itlb_data(prom_itlb[i].tlb_ent, - prom_itlb[i].tlb_data); - else - cheetah_put_litlb_data(prom_itlb[i].tlb_ent, - prom_itlb[i].tlb_data); - } - } -} - -#ifdef DCACHE_ALIASING_POSSIBLE -void __flush_dcache_range(unsigned long start, unsigned long end) -{ - unsigned long va; - - if (tlb_type == spitfire) { - int n = 0; - - for (va = start; va < end; va += 32) { - spitfire_put_dcache_tag(va & 0x3fe0, 0x0); - if (++n >= 512) - break; - } - } else { - start = __pa(start); - end = __pa(end); - for (va = start; va < end; va += 32) - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (va), - "i" (ASI_DCACHE_INVALIDATE)); - } -} -#endif /* DCACHE_ALIASING_POSSIBLE */ - -/* If not locked, zap it. */ -void __flush_tlb_all(void) -{ - unsigned long pstate; - int i; - - __asm__ __volatile__("flushw\n\t" - "rdpr %%pstate, %0\n\t" - "wrpr %0, %1, %%pstate" - : "=r" (pstate) - : "i" (PSTATE_IE)); - if (tlb_type == spitfire) { - for (i = 0; i < 64; i++) { - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - if (!(spitfire_get_dtlb_data(i) & _PAGE_L)) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - spitfire_put_dtlb_data(i, 0x0UL); - } - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - if (!(spitfire_get_itlb_data(i) & _PAGE_L)) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); - spitfire_put_itlb_data(i, 0x0UL); - } - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - cheetah_flush_dtlb_all(); - cheetah_flush_itlb_all(); - } - __asm__ __volatile__("wrpr %0, 0, %%pstate" - : : "r" (pstate)); -} - -/* Caller does TLB context flushing on local CPU if necessary. - * The caller also ensures that CTX_VALID(mm->context) is false. - * - * We must be careful about boundary cases so that we never - * let the user have CTX 0 (nucleus) or we ever use a CTX - * version of zero (and thus NO_CONTEXT would not be caught - * by version mis-match tests in mmu_context.h). - */ -void get_new_mmu_context(struct mm_struct *mm) -{ - unsigned long ctx, new_ctx; - unsigned long orig_pgsz_bits; - - - spin_lock(&ctx_alloc_lock); - orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK); - ctx = (tlb_context_cache + 1) & CTX_NR_MASK; - new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx); - if (new_ctx >= (1 << CTX_NR_BITS)) { - new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1); - if (new_ctx >= ctx) { - int i; - new_ctx = (tlb_context_cache & CTX_VERSION_MASK) + - CTX_FIRST_VERSION; - if (new_ctx == 1) - new_ctx = CTX_FIRST_VERSION; - - /* Don't call memset, for 16 entries that's just - * plain silly... - */ - mmu_context_bmap[0] = 3; - mmu_context_bmap[1] = 0; - mmu_context_bmap[2] = 0; - mmu_context_bmap[3] = 0; - for (i = 4; i < CTX_BMAP_SLOTS; i += 4) { - mmu_context_bmap[i + 0] = 0; - mmu_context_bmap[i + 1] = 0; - mmu_context_bmap[i + 2] = 0; - mmu_context_bmap[i + 3] = 0; - } - goto out; - } - } - mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63)); - new_ctx |= (tlb_context_cache & CTX_VERSION_MASK); -out: - tlb_context_cache = new_ctx; - mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits; - spin_unlock(&ctx_alloc_lock); -} - -#ifndef CONFIG_SMP -struct pgtable_cache_struct pgt_quicklists; -#endif - -/* OK, we have to color these pages. The page tables are accessed - * by non-Dcache enabled mapping in the VPTE area by the dtlb_backend.S - * code, as well as by PAGE_OFFSET range direct-mapped addresses by - * other parts of the kernel. By coloring, we make sure that the tlbmiss - * fast handlers do not get data from old/garbage dcache lines that - * correspond to an old/stale virtual address (user/kernel) that - * previously mapped the pagetable page while accessing vpte range - * addresses. The idea is that if the vpte color and PAGE_OFFSET range - * color is the same, then when the kernel initializes the pagetable - * using the later address range, accesses with the first address - * range will see the newly initialized data rather than the garbage. - */ -#ifdef DCACHE_ALIASING_POSSIBLE -#define DC_ALIAS_SHIFT 1 -#else -#define DC_ALIAS_SHIFT 0 -#endif -pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) -{ - struct page *page; - unsigned long color; - - { - pte_t *ptep = pte_alloc_one_fast(mm, address); - - if (ptep) - return ptep; - } - - color = VPTE_COLOR(address); - page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, DC_ALIAS_SHIFT); - if (page) { - unsigned long *to_free; - unsigned long paddr; - pte_t *pte; - -#ifdef DCACHE_ALIASING_POSSIBLE - set_page_count(page, 1); - ClearPageCompound(page); - - set_page_count((page + 1), 1); - ClearPageCompound(page + 1); -#endif - paddr = (unsigned long) page_address(page); - memset((char *)paddr, 0, (PAGE_SIZE << DC_ALIAS_SHIFT)); - - if (!color) { - pte = (pte_t *) paddr; - to_free = (unsigned long *) (paddr + PAGE_SIZE); - } else { - pte = (pte_t *) (paddr + PAGE_SIZE); - to_free = (unsigned long *) paddr; - } - -#ifdef DCACHE_ALIASING_POSSIBLE - /* Now free the other one up, adjust cache size. */ - preempt_disable(); - *to_free = (unsigned long) pte_quicklist[color ^ 0x1]; - pte_quicklist[color ^ 0x1] = to_free; - pgtable_cache_size++; - preempt_enable(); -#endif - - return pte; - } - return NULL; -} - -void sparc_ultra_dump_itlb(void) -{ - int slot; - - if (tlb_type == spitfire) { - printk ("Contents of itlb: "); - for (slot = 0; slot < 14; slot++) printk (" "); - printk ("%2x:%016lx,%016lx\n", - 0, - spitfire_get_itlb_tag(0), spitfire_get_itlb_data(0)); - for (slot = 1; slot < 64; slot+=3) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - spitfire_get_itlb_tag(slot), spitfire_get_itlb_data(slot), - slot+1, - spitfire_get_itlb_tag(slot+1), spitfire_get_itlb_data(slot+1), - slot+2, - spitfire_get_itlb_tag(slot+2), spitfire_get_itlb_data(slot+2)); - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - printk ("Contents of itlb0:\n"); - for (slot = 0; slot < 16; slot+=2) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - cheetah_get_litlb_tag(slot), cheetah_get_litlb_data(slot), - slot+1, - cheetah_get_litlb_tag(slot+1), cheetah_get_litlb_data(slot+1)); - } - printk ("Contents of itlb2:\n"); - for (slot = 0; slot < 128; slot+=2) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - cheetah_get_itlb_tag(slot), cheetah_get_itlb_data(slot), - slot+1, - cheetah_get_itlb_tag(slot+1), cheetah_get_itlb_data(slot+1)); - } - } -} - -void sparc_ultra_dump_dtlb(void) -{ - int slot; - - if (tlb_type == spitfire) { - printk ("Contents of dtlb: "); - for (slot = 0; slot < 14; slot++) printk (" "); - printk ("%2x:%016lx,%016lx\n", 0, - spitfire_get_dtlb_tag(0), spitfire_get_dtlb_data(0)); - for (slot = 1; slot < 64; slot+=3) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - spitfire_get_dtlb_tag(slot), spitfire_get_dtlb_data(slot), - slot+1, - spitfire_get_dtlb_tag(slot+1), spitfire_get_dtlb_data(slot+1), - slot+2, - spitfire_get_dtlb_tag(slot+2), spitfire_get_dtlb_data(slot+2)); - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - printk ("Contents of dtlb0:\n"); - for (slot = 0; slot < 16; slot+=2) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - cheetah_get_ldtlb_tag(slot), cheetah_get_ldtlb_data(slot), - slot+1, - cheetah_get_ldtlb_tag(slot+1), cheetah_get_ldtlb_data(slot+1)); - } - printk ("Contents of dtlb2:\n"); - for (slot = 0; slot < 512; slot+=2) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - cheetah_get_dtlb_tag(slot, 2), cheetah_get_dtlb_data(slot, 2), - slot+1, - cheetah_get_dtlb_tag(slot+1, 2), cheetah_get_dtlb_data(slot+1, 2)); - } - if (tlb_type == cheetah_plus) { - printk ("Contents of dtlb3:\n"); - for (slot = 0; slot < 512; slot+=2) { - printk ("%2x:%016lx,%016lx %2x:%016lx,%016lx\n", - slot, - cheetah_get_dtlb_tag(slot, 3), cheetah_get_dtlb_data(slot, 3), - slot+1, - cheetah_get_dtlb_tag(slot+1, 3), cheetah_get_dtlb_data(slot+1, 3)); - } - } - } -} - -extern unsigned long cmdline_memory_size; - -unsigned long __init bootmem_init(unsigned long *pages_avail) -{ - unsigned long bootmap_size, start_pfn, end_pfn; - unsigned long end_of_phys_memory = 0UL; - unsigned long bootmap_pfn, bytes_avail, size; - int i; - -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("bootmem_init: Scan pavail, "); -#endif - - 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; - if (cmdline_memory_size) { - if (bytes_avail > cmdline_memory_size) { - unsigned long slack = bytes_avail - cmdline_memory_size; - - bytes_avail -= slack; - end_of_phys_memory -= slack; - - pavail[i].reg_size -= slack; - if ((long)pavail[i].reg_size <= 0L) { - pavail[i].phys_addr = 0xdeadbeefUL; - pavail[i].reg_size = 0UL; - pavail_ents = i; - } else { - pavail[i+1].reg_size = 0Ul; - pavail[i+1].phys_addr = 0xdeadbeefUL; - pavail_ents = i + 1; - } - break; - } - } - } - - *pages_avail = bytes_avail >> PAGE_SHIFT; - - /* Start with page aligned address of last symbol in kernel - * image. The kernel is hard mapped below PAGE_OFFSET in a - * 4MB locked TLB translation. - */ - start_pfn = PAGE_ALIGN(kern_base + kern_size) >> PAGE_SHIFT; - - bootmap_pfn = start_pfn; - - end_pfn = end_of_phys_memory >> PAGE_SHIFT; - -#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; - if (ramdisk_image >= (unsigned long)_end - 2 * PAGE_SIZE) - 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; - } - if (initrd_start) { - if (initrd_start >= (start_pfn << PAGE_SHIFT) && - initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE) - bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT; - } - } -#endif - /* Initialize the boot-time allocator. */ - max_pfn = max_low_pfn = end_pfn; - min_low_pfn = pfn_base; - -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("init_bootmem(min[%lx], bootmap[%lx], max[%lx])\n", - min_low_pfn, bootmap_pfn, max_low_pfn); -#endif - bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base, end_pfn); - - /* Now register the available physical memory with the - * allocator. - */ - for (i = 0; i < pavail_ents; i++) { -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("free_bootmem(pavail:%d): base[%lx] size[%lx]\n", - i, pavail[i].phys_addr, pavail[i].reg_size); -#endif - free_bootmem(pavail[i].phys_addr, pavail[i].reg_size); - } - -#ifdef CONFIG_BLK_DEV_INITRD - if (initrd_start) { - size = initrd_end - initrd_start; - - /* Resert the initrd image area. */ -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("reserve_bootmem(initrd): base[%llx] size[%lx]\n", - initrd_start, initrd_end); -#endif - reserve_bootmem(initrd_start, size); - *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; - - initrd_start += PAGE_OFFSET; - initrd_end += PAGE_OFFSET; - } -#endif - /* Reserve the kernel text/data/bss. */ -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("reserve_bootmem(kernel): base[%lx] size[%lx]\n", kern_base, kern_size); -#endif - reserve_bootmem(kern_base, kern_size); - *pages_avail -= PAGE_ALIGN(kern_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; -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("reserve_bootmem(bootmap): base[%lx] size[%lx]\n", - (bootmap_pfn << PAGE_SHIFT), size); -#endif - reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size); - *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT; - - return end_pfn; -} - -#ifdef CONFIG_DEBUG_PAGEALLOC -static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot) -{ - unsigned long vstart = PAGE_OFFSET + pstart; - unsigned long vend = PAGE_OFFSET + pend; - unsigned long alloc_bytes = 0UL; - - if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { - prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n", - vstart, vend); - prom_halt(); - } - - while (vstart < vend) { - unsigned long this_end, paddr = __pa(vstart); - pgd_t *pgd = pgd_offset_k(vstart); - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - pud = pud_offset(pgd, vstart); - if (pud_none(*pud)) { - pmd_t *new; - - new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); - alloc_bytes += PAGE_SIZE; - pud_populate(&init_mm, pud, new); - } - - pmd = pmd_offset(pud, vstart); - if (!pmd_present(*pmd)) { - pte_t *new; - - new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); - alloc_bytes += PAGE_SIZE; - pmd_populate_kernel(&init_mm, pmd, new); - } - - pte = pte_offset_kernel(pmd, vstart); - this_end = (vstart + PMD_SIZE) & PMD_MASK; - if (this_end > vend) - this_end = vend; - - while (vstart < this_end) { - pte_val(*pte) = (paddr | pgprot_val(prot)); - - vstart += PAGE_SIZE; - paddr += PAGE_SIZE; - pte++; - } - } - - return alloc_bytes; -} - -static struct linux_prom64_registers pall[MAX_BANKS] __initdata; -static int pall_ents __initdata; - -extern unsigned int kvmap_linear_patch[1]; - -static void __init kernel_physical_mapping_init(void) -{ - unsigned long i, mem_alloced = 0UL; - - read_obp_memory("reg", &pall[0], &pall_ents); - - for (i = 0; i < pall_ents; i++) { - unsigned long phys_start, phys_end; - - phys_start = pall[i].phys_addr; - phys_end = phys_start + pall[i].reg_size; - mem_alloced += kernel_map_range(phys_start, phys_end, - PAGE_KERNEL); - } - - printk("Allocated %ld bytes for kernel page tables.\n", - mem_alloced); - - kvmap_linear_patch[0] = 0x01000000; /* nop */ - flushi(&kvmap_linear_patch[0]); - - __flush_tlb_all(); -} - -void kernel_map_pages(struct page *page, int numpages, int enable) -{ - unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT; - unsigned long phys_end = phys_start + (numpages * PAGE_SIZE); - - kernel_map_range(phys_start, phys_end, - (enable ? PAGE_KERNEL : __pgprot(0))); - - /* we should perform an IPI and flush all tlbs, - * but that can deadlock->flush only current cpu. - */ - __flush_tlb_kernel_range(PAGE_OFFSET + phys_start, - PAGE_OFFSET + phys_end); -} -#endif - -unsigned long __init find_ecache_flush_span(unsigned long size) -{ - int i; - - for (i = 0; i < pavail_ents; i++) { - if (pavail[i].reg_size >= size) - return pavail[i].phys_addr; - } - - return ~0UL; -} - -/* paging_init() sets up the page tables */ - -extern void cheetah_ecache_flush_init(void); - -static unsigned long last_valid_pfn; -pgd_t swapper_pg_dir[2048]; - -void __init paging_init(void) -{ - unsigned long end_pfn, pages_avail, shift; - unsigned long real_end, i; - - /* Find available physical memory... */ - read_obp_memory("available", &pavail[0], &pavail_ents); - - phys_base = 0xffffffffffffffffUL; - for (i = 0; i < pavail_ents; i++) - phys_base = min(phys_base, pavail[i].phys_addr); - - pfn_base = phys_base >> PAGE_SHIFT; - - kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; - kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; - - set_bit(0, mmu_context_bmap); - - shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE); - - real_end = (unsigned long)_end; - if ((real_end > ((unsigned long)KERNBASE + 0x400000))) - bigkernel = 1; - if ((real_end > ((unsigned long)KERNBASE + 0x800000))) { - prom_printf("paging_init: Kernel > 8MB, too large.\n"); - prom_halt(); - } - - /* Set kernel pgd to upper alias so physical page computations - * work. - */ - init_mm.pgd += ((shift) / (sizeof(pgd_t))); - - memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir)); - - /* Now can init the kernel/bad page tables. */ - pud_set(pud_offset(&swapper_pg_dir[0], 0), - swapper_low_pmd_dir + (shift / sizeof(pgd_t))); - - swapper_pgd_zero = pgd_val(swapper_pg_dir[0]); - - inherit_prom_mappings(); - - /* Ok, we can use our TLB miss and window trap handlers safely. - * We need to do a quick peek here to see if we are on StarFire - * or not, so setup_tba can setup the IRQ globals correctly (it - * needs to get the hard smp processor id correctly). - */ - { - extern void setup_tba(int); - setup_tba(this_is_starfire); - } - - inherit_locked_prom_mappings(1); - - __flush_tlb_all(); - - /* Setup bootmem... */ - pages_avail = 0; - last_valid_pfn = end_pfn = bootmem_init(&pages_avail); - -#ifdef CONFIG_DEBUG_PAGEALLOC - kernel_physical_mapping_init(); -#endif - - { - unsigned long zones_size[MAX_NR_ZONES]; - unsigned long zholes_size[MAX_NR_ZONES]; - unsigned long npages; - int znum; - - for (znum = 0; znum < MAX_NR_ZONES; znum++) - zones_size[znum] = zholes_size[znum] = 0; - - npages = end_pfn - pfn_base; - zones_size[ZONE_DMA] = npages; - zholes_size[ZONE_DMA] = npages - pages_avail; - - free_area_init_node(0, &contig_page_data, zones_size, - phys_base >> PAGE_SHIFT, zholes_size); - } - - device_scan(); -} - -static void __init taint_real_pages(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; - while (old_start < old_end) { - int n; - - for (n = 0; pavail_rescan_ents; n++) { - unsigned long new_start, new_end; - - new_start = pavail_rescan[n].phys_addr; - new_end = new_start + - pavail_rescan[n].reg_size; - - if (new_start <= old_start && - new_end >= (old_start + PAGE_SIZE)) { - set_bit(old_start >> 22, - sparc64_valid_addr_bitmap); - goto do_next_page; - } - } - reserve_bootmem(old_start, PAGE_SIZE); - - do_next_page: - old_start += PAGE_SIZE; - } - } -} - -void __init mem_init(void) -{ - unsigned long codepages, datapages, initpages; - unsigned long addr, last; - int i; - - i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6); - i += 1; - sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3); - if (sparc64_valid_addr_bitmap == NULL) { - prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); - prom_halt(); - } - memset(sparc64_valid_addr_bitmap, 0, i << 3); - - addr = PAGE_OFFSET + kern_base; - last = PAGE_ALIGN(kern_size) + addr; - while (addr < last) { - set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap); - addr += PAGE_SIZE; - } - - taint_real_pages(); - - max_mapnr = last_valid_pfn - pfn_base; - high_memory = __va(last_valid_pfn << PAGE_SHIFT); - -#ifdef CONFIG_DEBUG_BOOTMEM - prom_printf("mem_init: Calling free_all_bootmem().\n"); -#endif - totalram_pages = num_physpages = free_all_bootmem() - 1; - - /* - * Set up the zero page, mark it reserved, so that page count - * is not manipulated when freeing the page from user ptes. - */ - mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0); - if (mem_map_zero == NULL) { - prom_printf("paging_init: Cannot alloc zero page.\n"); - prom_halt(); - } - SetPageReserved(mem_map_zero); - - codepages = (((unsigned long) _etext) - ((unsigned long) _start)); - codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; - datapages = (((unsigned long) _edata) - ((unsigned long) _etext)); - datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT; - initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin)); - initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT; - - printk("Memory: %uk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n", - nr_free_pages() << (PAGE_SHIFT-10), - codepages << (PAGE_SHIFT-10), - datapages << (PAGE_SHIFT-10), - initpages << (PAGE_SHIFT-10), - PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT)); - - if (tlb_type == cheetah || tlb_type == cheetah_plus) - cheetah_ecache_flush_init(); -} - -void free_initmem(void) -{ - unsigned long addr, initend; - - /* - * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. - */ - addr = PAGE_ALIGN((unsigned long)(__init_begin)); - initend = (unsigned long)(__init_end) & PAGE_MASK; - for (; addr < initend; addr += PAGE_SIZE) { - unsigned long page; - struct page *p; - - page = (addr + - ((unsigned long) __va(kern_base)) - - ((unsigned long) KERNBASE)); - memset((void *)addr, 0xcc, PAGE_SIZE); - p = virt_to_page(page); - - ClearPageReserved(p); - set_page_count(p, 1); - __free_page(p); - num_physpages++; - totalram_pages++; - } -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - if (start < end) - printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); - for (; start < end; start += PAGE_SIZE) { - struct page *p = virt_to_page(start); - - ClearPageReserved(p); - set_page_count(p, 1); - __free_page(p); - num_physpages++; - totalram_pages++; - } -} -#endif |