init.c
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上传日期:2013-04-10
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文件大小:48k
- /* $Id: init.c,v 1.207 2001/11/30 06:55:39 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/slab.h>
- #include <linux/blk.h>
- #include <linux/swap.h>
- #include <linux/swapctl.h>
- #include <linux/pagemap.h>
- #include <linux/fs.h>
- #include <linux/seq_file.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/dma.h>
- #include <asm/starfire.h>
- #include <asm/tlb.h>
- #include <asm/spitfire.h>
- mmu_gather_t mmu_gathers[NR_CPUS];
- extern void device_scan(void);
- struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
- unsigned long *sparc64_valid_addr_bitmap;
- /* Ugly, but necessary... -DaveM */
- unsigned long phys_base;
- enum ultra_tlb_layout tlb_type = spitfire;
- /* get_new_mmu_context() uses "cache + 1". */
- spinlock_t ctx_alloc_lock = SPIN_LOCK_UNLOCKED;
- unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1;
- #define CTX_BMAP_SLOTS (1UL << (CTX_VERSION_SHIFT - 6))
- unsigned long mmu_context_bmap[CTX_BMAP_SLOTS];
- /* References to section boundaries */
- extern char __init_begin, __init_end, _start, _end, etext, edata;
- /* Initial ramdisk setup */
- extern unsigned int sparc_ramdisk_image;
- extern unsigned int sparc_ramdisk_size;
- struct page *mem_map_zero;
- int bigkernel = 0;
- int do_check_pgt_cache(int low, int high)
- {
- int freed = 0;
- if (pgtable_cache_size > high) {
- do {
- #ifdef CONFIG_SMP
- if (pgd_quicklist)
- free_pgd_slow(get_pgd_fast()), freed++;
- #endif
- if (pte_quicklist[0])
- free_pte_slow(pte_alloc_one_fast(NULL, 0)), freed++;
- if (pte_quicklist[1])
- free_pte_slow(pte_alloc_one_fast(NULL, 1 << (PAGE_SHIFT + 10))), freed++;
- } while (pgtable_cache_size > low);
- }
- #ifndef CONFIG_SMP
- if (pgd_cache_size > high / 4) {
- struct page *page, *page2;
- for (page2 = NULL, page = (struct page *)pgd_quicklist; page;) {
- if ((unsigned long)page->pprev_hash == 3) {
- if (page2)
- page2->next_hash = page->next_hash;
- else
- (struct page *)pgd_quicklist = page->next_hash;
- page->next_hash = NULL;
- page->pprev_hash = NULL;
- pgd_cache_size -= 2;
- __free_page(page);
- freed++;
- if (page2)
- page = page2->next_hash;
- else
- page = (struct page *)pgd_quicklist;
- if (pgd_cache_size <= low / 4)
- break;
- continue;
- }
- page2 = page;
- page = page->next_hash;
- }
- }
- #endif
- return freed;
- }
- extern void __update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
- #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
- #if (L1DCACHE_SIZE > PAGE_SIZE)
- __flush_dcache_page(page->virtual,
- ((tlb_type == spitfire) &&
- page->mapping != NULL));
- #else
- if (page->mapping != NULL &&
- tlb_type == spitfire)
- __flush_icache_page(__pa(page->virtual));
- #endif
- }
- #define PG_dcache_dirty PG_arch_1
- #define dcache_dirty_cpu(page)
- (((page)->flags >> 24) & (NR_CPUS - 1UL))
- static __inline__ void set_dcache_dirty(struct page *page)
- {
- unsigned long mask = smp_processor_id();
- unsigned long non_cpu_bits = (1UL << 24UL) - 1UL;
- mask = (mask << 24) | (1UL << PG_dcache_dirty);
- __asm__ __volatile__("1:nt"
- "ldx [%2], %%g7nt"
- "and %%g7, %1, %%g5nt"
- "or %%g5, %0, %%g5nt"
- "casx [%2], %%g7, %%g5nt"
- "cmp %%g7, %%g5nt"
- "bne,pn %%xcc, 1bnt"
- " membar #StoreLoad | #StoreStore"
- : /* no outputs */
- : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags)
- : "g5", "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_dirtyn"
- "1:nt"
- "ldx [%2], %%g7nt"
- "srlx %%g7, 24, %%g5nt"
- "cmp %%g5, %0nt"
- "bne,pn %%icc, 2fnt"
- " andn %%g7, %1, %%g5nt"
- "casx [%2], %%g7, %%g5nt"
- "cmp %%g7, %%g5nt"
- "bne,pn %%xcc, 1bnt"
- " membar #StoreLoad | #StoreStoren"
- "2:"
- : /* no outputs */
- : "r" (cpu), "r" (mask), "r" (&page->flags)
- : "g5", "g7");
- }
- void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
- {
- struct page *page = pte_page(pte);
- unsigned long pg_flags;
- if (VALID_PAGE(page) &&
- page->mapping &&
- ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) {
- int cpu = (pg_flags >> 24);
- /* This is just to optimize away some function calls
- * in the SMP case.
- */
- if (cpu == smp_processor_id())
- flush_dcache_page_impl(page);
- else
- smp_flush_dcache_page_impl(page, cpu);
- clear_dcache_dirty_cpu(page, cpu);
- }
- __update_mmu_cache(vma, address, pte);
- }
- void flush_dcache_page(struct page *page)
- {
- int dirty = test_bit(PG_dcache_dirty, &page->flags);
- int dirty_cpu = dcache_dirty_cpu(page);
- if (page->mapping &&
- page->mapping->i_mmap == NULL &&
- page->mapping->i_mmap_shared == NULL) {
- if (dirty) {
- if (dirty_cpu == smp_processor_id())
- return;
- smp_flush_dcache_page_impl(page, dirty_cpu);
- }
- set_dcache_dirty(page);
- } 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);
- }
- }
- void 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));
- }
- }
- void show_mem(void)
- {
- printk("Mem-info:n");
- show_free_areas();
- printk("Free swap: %6dkBn",
- nr_swap_pages << (PAGE_SHIFT-10));
- printk("%ld pages of RAMn", num_physpages);
- printk("%d free pagesn", nr_free_pages());
- printk("%d pages in page table cachen",pgtable_cache_size);
- #ifndef CONFIG_SMP
- printk("%d entries in page dir cachen",pgd_cache_size);
- #endif
- show_buffers();
- }
- void mmu_info(struct seq_file *m)
- {
- if (tlb_type == cheetah)
- seq_printf(m, "MMU Typet: Cheetahn");
- else if (tlb_type == cheetah_plus)
- seq_printf(m, "MMU Typet: Cheetah+n");
- else if (tlb_type == spitfire)
- seq_printf(m, "MMU Typet: Spitfiren");
- else
- seq_printf(m, "MMU Typet: ???n");
- #ifdef CONFIG_DEBUG_DCFLUSH
- seq_printf(m, "DCPageFlushest: %dn",
- atomic_read(&dcpage_flushes));
- #ifdef CONFIG_SMP
- seq_printf(m, "DCPageFlushesXCt: %dn",
- 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;
- };
- 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;
- void __init early_pgtable_allocfail(char *type)
- {
- prom_printf("inherit_prom_mappings: Cannot alloc kernel %s.n", type);
- prom_halt();
- }
- #define BASE_PAGE_SIZE 8192
- static pmd_t *prompmd;
- /*
- * 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)
- {
- pmd_t *pmdp = prompmd + ((promva >> 23) & 0x7ff);
- pte_t *ptep;
- unsigned long base;
- if (pmd_none(*pmdp)) {
- if (error)
- *error = 1;
- return(0);
- }
- ptep = (pte_t *)pmd_page(*pmdp) + ((promva >> 13) & 0x3ff);
- if (!pte_present(*ptep)) {
- if (error)
- *error = 1;
- return(0);
- }
- if (error) {
- *error = 0;
- return(pte_val(*ptep));
- }
- base = pte_val(*ptep) & _PAGE_PADDR;
- return(base + (promva & (BASE_PAGE_SIZE - 1)));
- }
- static void inherit_prom_mappings(void)
- {
- struct linux_prom_translation *trans;
- unsigned long phys_page, tte_vaddr, tte_data;
- void (*remap_func)(unsigned long, unsigned long, int);
- pmd_t *pmdp;
- pte_t *ptep;
- int node, n, i, tsz;
- extern unsigned int obp_iaddr_patch[2], obp_daddr_patch[2];
- node = prom_finddevice("/virtual-memory");
- n = prom_getproplen(node, "translations");
- if (n == 0 || n == -1) {
- prom_printf("Couldn't get translation propertyn");
- prom_halt();
- }
- n += 5 * sizeof(struct linux_prom_translation);
- for (tsz = 1; tsz < n; tsz <<= 1)
- /* empty */;
- trans = __alloc_bootmem(tsz, SMP_CACHE_BYTES, 0UL);
- if (trans == NULL) {
- prom_printf("inherit_prom_mappings: Cannot alloc translations.n");
- prom_halt();
- }
- memset(trans, 0, tsz);
- if ((n = prom_getproperty(node, "translations", (char *)trans, tsz)) == -1) {
- prom_printf("Couldn't get translation propertyn");
- prom_halt();
- }
- n = n / sizeof(*trans);
- /*
- * The obp translations are saved based on 8k pagesize, since obp can use
- * a mixture of pagesizes. Misses to the 0xf0000000 - 0x100000000, ie obp
- * range, are handled in entry.S and do not use the vpte scheme (see rant
- * in inherit_locked_prom_mappings()).
- */
- #define OBP_PMD_SIZE 2048
- prompmd = __alloc_bootmem(OBP_PMD_SIZE, OBP_PMD_SIZE, 0UL);
- if (prompmd == NULL)
- early_pgtable_allocfail("pmd");
- memset(prompmd, 0, OBP_PMD_SIZE);
- for (i = 0; i < n; i++) {
- unsigned long vaddr;
- if (trans[i].virt >= LOW_OBP_ADDRESS && trans[i].virt < HI_OBP_ADDRESS) {
- for (vaddr = trans[i].virt;
- ((vaddr < trans[i].virt + trans[i].size) &&
- (vaddr < HI_OBP_ADDRESS));
- vaddr += BASE_PAGE_SIZE) {
- unsigned long val;
- pmdp = prompmd + ((vaddr >> 23) & 0x7ff);
- if (pmd_none(*pmdp)) {
- ptep = __alloc_bootmem(BASE_PAGE_SIZE,
- BASE_PAGE_SIZE,
- 0UL);
- if (ptep == NULL)
- early_pgtable_allocfail("pte");
- memset(ptep, 0, BASE_PAGE_SIZE);
- pmd_set(pmdp, ptep);
- }
- ptep = (pte_t *)pmd_page(*pmdp) +
- ((vaddr >> 13) & 0x3ff);
- val = trans[i].data;
- /* Clear diag TTE bits. */
- if (tlb_type == spitfire)
- val &= ~0x0003fe0000000000UL;
- set_pte (ptep, __pte(val | _PAGE_MODIFIED));
- trans[i].data += BASE_PAGE_SIZE;
- }
- }
- }
- phys_page = __pa(prompmd);
- obp_iaddr_patch[0] |= (phys_page >> 10);
- obp_iaddr_patch[1] |= (phys_page & 0x3ff);
- flushi((long)&obp_iaddr_patch[0]);
- obp_daddr_patch[0] |= (phys_page >> 10);
- obp_daddr_patch[1] |= (phys_page & 0x3ff);
- flushi((long)&obp_daddr_patch[0]);
- /* Now fixup OBP's idea about where we really are mapped. */
- prom_printf("Remapping the kernel... ");
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "flush %%g6"
- : /* No outputs */
- : "r" (0),
- "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
- switch (tlb_type) {
- default:
- case spitfire:
- phys_page = spitfire_get_dtlb_data(sparc64_highest_locked_tlbent());
- break;
- case cheetah:
- case cheetah_plus:
- phys_page = cheetah_get_litlb_data(sparc64_highest_locked_tlbent());
- break;
- };
- phys_page &= _PAGE_PADDR;
- phys_page += ((unsigned long)&prom_boot_page -
- (unsigned long)KERNBASE);
- if (tlb_type == spitfire) {
- /* Lock this into i/d tlb entry 59 */
- __asm__ __volatile__(
- "stxa %%g0, [%2] %3nt"
- "stxa %0, [%1] %4nt"
- "membar #Syncnt"
- "flush %%g6nt"
- "stxa %%g0, [%2] %5nt"
- "stxa %0, [%1] %6nt"
- "membar #Syncnt"
- "flush %%g6"
- : : "r" (phys_page | _PAGE_VALID | _PAGE_SZ8K | _PAGE_CP |
- _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W),
- "r" (59 << 3), "r" (TLB_TAG_ACCESS),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS),
- "i" (ASI_IMMU), "i" (ASI_ITLB_DATA_ACCESS)
- : "memory");
- } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- /* Lock this into i/d tlb-0 entry 11 */
- __asm__ __volatile__(
- "stxa %%g0, [%2] %3nt"
- "stxa %0, [%1] %4nt"
- "membar #Syncnt"
- "flush %%g6nt"
- "stxa %%g0, [%2] %5nt"
- "stxa %0, [%1] %6nt"
- "membar #Syncnt"
- "flush %%g6"
- : : "r" (phys_page | _PAGE_VALID | _PAGE_SZ8K | _PAGE_CP |
- _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W),
- "r" ((0 << 16) | (11 << 3)), "r" (TLB_TAG_ACCESS),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS),
- "i" (ASI_IMMU), "i" (ASI_ITLB_DATA_ACCESS)
- : "memory");
- } else {
- /* Implement me :-) */
- BUG();
- }
- tte_vaddr = (unsigned long) KERNBASE;
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "flush %%g6"
- : /* No outputs */
- : "r" (0),
- "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
- if (tlb_type == spitfire)
- tte_data = spitfire_get_dtlb_data(sparc64_highest_locked_tlbent());
- else
- tte_data = cheetah_get_ldtlb_data(sparc64_highest_locked_tlbent());
- kern_locked_tte_data = tte_data;
- remap_func = (void *) ((unsigned long) &prom_remap -
- (unsigned long) &prom_boot_page);
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "flush %%g6"
- : /* No outputs */
- : "r" (0),
- "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU));
- remap_func((tlb_type == spitfire ?
- (spitfire_get_dtlb_data(sparc64_highest_locked_tlbent()) & _PAGE_PADDR) :
- (cheetah_get_litlb_data(sparc64_highest_locked_tlbent()) & _PAGE_PADDR)),
- (unsigned long) KERNBASE,
- prom_get_mmu_ihandle());
- if (bigkernel)
- remap_func(((tte_data + 0x400000) & _PAGE_PADDR),
- (unsigned long) KERNBASE + 0x400000, prom_get_mmu_ihandle());
- /* Flush out that temporary mapping. */
- spitfire_flush_dtlb_nucleus_page(0x0);
- spitfire_flush_itlb_nucleus_page(0x0);
- /* Now lock us back into the TLBs via OBP. */
- prom_dtlb_load(sparc64_highest_locked_tlbent(), tte_data, tte_vaddr);
- prom_itlb_load(sparc64_highest_locked_tlbent(), tte_data, tte_vaddr);
- if (bigkernel) {
- prom_dtlb_load(sparc64_highest_locked_tlbent()-1, tte_data + 0x400000,
- tte_vaddr + 0x400000);
- prom_itlb_load(sparc64_highest_locked_tlbent()-1, tte_data + 0x400000,
- tte_vaddr + 0x400000);
- }
- /* Re-read translations property. */
- if ((n = prom_getproperty(node, "translations", (char *)trans, tsz)) == -1) {
- prom_printf("Couldn't get translation propertyn");
- prom_halt();
- }
- n = n / sizeof(*trans);
- for (i = 0; i < n; i++) {
- unsigned long vaddr = trans[i].virt;
- unsigned long size = trans[i].size;
- if (vaddr < 0xf0000000UL) {
- unsigned long avoid_start = (unsigned long) KERNBASE;
- unsigned long avoid_end = avoid_start + (4 * 1024 * 1024);
- if (bigkernel)
- avoid_end += (4 * 1024 * 1024);
- if (vaddr < avoid_start) {
- unsigned long top = vaddr + size;
- if (top > avoid_start)
- top = avoid_start;
- prom_unmap(top - vaddr, vaddr);
- }
- if ((vaddr + size) > avoid_end) {
- unsigned long bottom = vaddr;
- if (bottom < avoid_end)
- bottom = avoid_end;
- prom_unmap((vaddr + size) - bottom, bottom);
- }
- }
- }
- prom_printf("done.n");
- register_prom_callbacks();
- }
- /* 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 */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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] %1nt"
- "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] %1nt"
- "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] %1nt"
- "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(current->thread.current_ds);
- if (!prom_ditlb_set)
- return;
- /* Make sure the following runs atomically. */
- __asm__ __volatile__("flushwnt"
- "rdpr %%pstate, %0nt"
- "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] %2nt"
- "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] %2nt"
- "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] %1nt"
- "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] %1nt"
- "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 = SPITFIRE_HIGHEST_LOCKED_TLBENT - bigkernel;
- for (i = 0; i < high; i++) {
- unsigned long data;
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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 */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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] %1nt"
- "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 */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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 */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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] %1nt"
- "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 = CHEETAH_HIGHEST_LOCKED_TLBENT - bigkernel;
- 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] %1nt"
- "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] %1nt"
- "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] %2nt"
- "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] %2nt"
- "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);
- }
- }
- }
- 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] %1nt"
- "membar #Sync"
- : /* no outputs */
- : "r" (va),
- "i" (ASI_DCACHE_INVALIDATE));
- }
- }
- void __flush_cache_all(void)
- {
- /* Cheetah should be fine here too. */
- if (tlb_type == spitfire) {
- unsigned long va;
- flushw_all();
- for (va = 0; va < (PAGE_SIZE << 1); va += 32)
- spitfire_put_icache_tag(va, 0x0);
- __asm__ __volatile__("flush %g6");
- }
- }
- /* If not locked, zap it. */
- void __flush_tlb_all(void)
- {
- unsigned long pstate;
- int i;
- __asm__ __volatile__("flushwnt"
- "rdpr %%pstate, %0nt"
- "wrpr %0, %1, %%pstate"
- : "=r" (pstate)
- : "i" (PSTATE_IE));
- if (tlb_type == spitfire) {
- for (i = 0; i < 64; i++) {
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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] %1nt"
- "membar #Sync"
- : /* no outputs */
- : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU));
- spitfire_put_dtlb_data(i, 0x0UL);
- }
- /* Spitfire Errata #32 workaround */
- __asm__ __volatile__("stxa %0, [%1] %2nt"
- "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] %1nt"
- "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;
-
- spin_lock(&ctx_alloc_lock);
- ctx = CTX_HWBITS(tlb_context_cache + 1);
- new_ctx = find_next_zero_bit(mmu_context_bmap, 1UL << CTX_VERSION_SHIFT, ctx);
- if (new_ctx >= (1UL << CTX_VERSION_SHIFT)) {
- 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;
- spin_unlock(&ctx_alloc_lock);
- mm->context = new_ctx;
- }
- #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.
- */
- #if (L1DCACHE_SIZE > PAGE_SIZE) /* is there D$ aliasing problem */
- #define DC_ALIAS_SHIFT 1
- #else
- #define DC_ALIAS_SHIFT 0
- #endif
- pte_t *pte_alloc_one(struct mm_struct *mm, unsigned long address)
- {
- struct page *page = alloc_pages(GFP_KERNEL, DC_ALIAS_SHIFT);
- unsigned long color = VPTE_COLOR(address);
- if (page) {
- unsigned long *to_free;
- unsigned long paddr;
- pte_t *pte;
- #if (L1DCACHE_SIZE > PAGE_SIZE) /* is there D$ aliasing problem */
- set_page_count((page + 1), 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;
- }
- #if (L1DCACHE_SIZE > PAGE_SIZE) /* is there D$ aliasing problem */
- /* Now free the other one up, adjust cache size. */
- *to_free = (unsigned long) pte_quicklist[color ^ 0x1];
- pte_quicklist[color ^ 0x1] = to_free;
- pgtable_cache_size++;
- #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,%016lxn",
- 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,%016lxn",
- 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,%016lxn",
- 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,%016lxn",
- 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,%016lxn", 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,%016lxn",
- 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,%016lxn",
- 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,%016lxn",
- 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,%016lxn",
- 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;
- bytes_avail = 0UL;
- for (i = 0; sp_banks[i].num_bytes != 0; i++) {
- end_of_phys_memory = sp_banks[i].base_addr +
- sp_banks[i].num_bytes;
- bytes_avail += sp_banks[i].num_bytes;
- 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;
- sp_banks[i].num_bytes -= slack;
- if (sp_banks[i].num_bytes == 0) {
- sp_banks[i].base_addr = 0xdeadbeef;
- } else {
- sp_banks[i+1].num_bytes = 0;
- sp_banks[i+1].base_addr = 0xdeadbeef;
- }
- 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((unsigned long) &_end) -
- ((unsigned long) KERNBASE);
- /* Adjust up to the physical address where the kernel begins. */
- start_pfn += phys_base;
- /* Now shift down to get the real physical page frame number. */
- start_pfn >>= 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) {
- if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
- sparc_ramdisk_image -= KERNBASE;
- initrd_start = sparc_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 initrdn",
- 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 = phys_base >> PAGE_SHIFT;
- bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, phys_base>>PAGE_SHIFT, end_pfn);
- /* Now register the available physical memory with the
- * allocator.
- */
- for (i = 0; sp_banks[i].num_bytes != 0; i++)
- free_bootmem(sp_banks[i].base_addr,
- sp_banks[i].num_bytes);
- #ifdef CONFIG_BLK_DEV_INITRD
- if (initrd_start) {
- size = initrd_end - initrd_start;
- /* Resert the initrd image area. */
- 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. */
- size = (start_pfn << PAGE_SHIFT) - phys_base;
- reserve_bootmem(phys_base, size);
- *pages_avail -= PAGE_ALIGN(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);
- *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
- return end_pfn;
- }
- /* paging_init() sets up the page tables */
- extern void sun_serial_setup(void);
- extern void cheetah_ecache_flush_init(void);
- static unsigned long last_valid_pfn;
- void __init paging_init(void)
- {
- extern pmd_t swapper_pmd_dir[1024];
- extern unsigned int sparc64_vpte_patchme1[1];
- extern unsigned int sparc64_vpte_patchme2[1];
- unsigned long alias_base = phys_base + PAGE_OFFSET;
- unsigned long second_alias_page = 0;
- unsigned long pt, flags, end_pfn, pages_avail;
- unsigned long shift = alias_base - ((unsigned long)KERNBASE);
- unsigned long real_end;
- set_bit(0, mmu_context_bmap);
- real_end = (unsigned long)&_end;
- if ((real_end > ((unsigned long)KERNBASE + 0x400000)))
- bigkernel = 1;
- #ifdef CONFIG_BLK_DEV_INITRD
- if (sparc_ramdisk_image)
- real_end = (PAGE_ALIGN(real_end) + PAGE_ALIGN(sparc_ramdisk_size));
- #endif
- /* We assume physical memory starts at some 4mb multiple,
- * if this were not true we wouldn't boot up to this point
- * anyways.
- */
- pt = phys_base | _PAGE_VALID | _PAGE_SZ4MB;
- pt |= _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_L | _PAGE_W;
- __save_and_cli(flags);
- if (tlb_type == spitfire) {
- __asm__ __volatile__(
- " stxa %1, [%0] %3n"
- " stxa %2, [%5] %4n"
- " membar #Syncn"
- " flush %%g6n"
- " nopn"
- " nopn"
- " nopn"
- : /* No outputs */
- : "r" (TLB_TAG_ACCESS), "r" (alias_base), "r" (pt),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" (61 << 3)
- : "memory");
- if (real_end >= KERNBASE + 0x340000) {
- second_alias_page = alias_base + 0x400000;
- __asm__ __volatile__(
- " stxa %1, [%0] %3n"
- " stxa %2, [%5] %4n"
- " membar #Syncn"
- " flush %%g6n"
- " nopn"
- " nopn"
- " nopn"
- : /* No outputs */
- : "r" (TLB_TAG_ACCESS), "r" (second_alias_page), "r" (pt + 0x400000),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" (60 << 3)
- : "memory");
- }
- } else if (tlb_type == cheetah || tlb_type == cheetah_plus) {
- __asm__ __volatile__(
- " stxa %1, [%0] %3n"
- " stxa %2, [%5] %4n"
- " membar #Syncn"
- " flush %%g6n"
- " nopn"
- " nopn"
- " nopn"
- : /* No outputs */
- : "r" (TLB_TAG_ACCESS), "r" (alias_base), "r" (pt),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" ((0<<16) | (13<<3))
- : "memory");
- if (real_end >= KERNBASE + 0x340000) {
- second_alias_page = alias_base + 0x400000;
- __asm__ __volatile__(
- " stxa %1, [%0] %3n"
- " stxa %2, [%5] %4n"
- " membar #Syncn"
- " flush %%g6n"
- " nopn"
- " nopn"
- " nopn"
- : /* No outputs */
- : "r" (TLB_TAG_ACCESS), "r" (second_alias_page), "r" (pt + 0x400000),
- "i" (ASI_DMMU), "i" (ASI_DTLB_DATA_ACCESS), "r" ((0<<16) | (12<<3))
- : "memory");
- }
- }
- __restore_flags(flags);
-
- /* Now set kernel pgd to upper alias so physical page computations
- * work.
- */
- init_mm.pgd += ((shift) / (sizeof(pgd_t)));
-
- memset(swapper_pmd_dir, 0, sizeof(swapper_pmd_dir));
- /* Now can init the kernel/bad page tables. */
- pgd_set(&swapper_pg_dir[0], swapper_pmd_dir + (shift / sizeof(pgd_t)));
-
- sparc64_vpte_patchme1[0] |= (pgd_val(init_mm.pgd[0]) >> 10);
- sparc64_vpte_patchme2[0] |= (pgd_val(init_mm.pgd[0]) & 0x3ff);
- flushi((long)&sparc64_vpte_patchme1[0]);
-
- /* Setup bootmem... */
- pages_avail = 0;
- last_valid_pfn = end_pfn = bootmem_init(&pages_avail);
- #ifdef CONFIG_SUN_SERIAL
- /* This does not logically belong here, but we need to
- * call it at the moment we are able to use the bootmem
- * allocator.
- */
- sun_serial_setup();
- #endif
- /* Inherit non-locked OBP mappings. */
- 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);
-
- /* We only created DTLB mapping of this stuff. */
- spitfire_flush_dtlb_nucleus_page(alias_base);
- if (second_alias_page)
- spitfire_flush_dtlb_nucleus_page(second_alias_page);
- __flush_tlb_all();
- {
- 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 - (phys_base >> PAGE_SHIFT);
- zones_size[ZONE_DMA] = npages;
- zholes_size[ZONE_DMA] = npages - pages_avail;
- free_area_init_node(0, NULL, NULL, zones_size,
- phys_base, zholes_size);
- }
- device_scan();
- }
- /* Ok, it seems that the prom can allocate some more memory chunks
- * as a side effect of some prom calls we perform during the
- * boot sequence. My most likely theory is that it is from the
- * prom_set_traptable() call, and OBP is allocating a scratchpad
- * for saving client program register state etc.
- */
- void __init sort_memlist(struct linux_mlist_p1275 *thislist)
- {
- int swapi = 0;
- int i, mitr;
- unsigned long tmpaddr, tmpsize;
- unsigned long lowest;
- for (i = 0; thislist[i].theres_more != 0; i++) {
- lowest = thislist[i].start_adr;
- for (mitr = i+1; thislist[mitr-1].theres_more != 0; mitr++)
- if (thislist[mitr].start_adr < lowest) {
- lowest = thislist[mitr].start_adr;
- swapi = mitr;
- }
- if (lowest == thislist[i].start_adr)
- continue;
- tmpaddr = thislist[swapi].start_adr;
- tmpsize = thislist[swapi].num_bytes;
- for (mitr = swapi; mitr > i; mitr--) {
- thislist[mitr].start_adr = thislist[mitr-1].start_adr;
- thislist[mitr].num_bytes = thislist[mitr-1].num_bytes;
- }
- thislist[i].start_adr = tmpaddr;
- thislist[i].num_bytes = tmpsize;
- }
- }
- void __init rescan_sp_banks(void)
- {
- struct linux_prom64_registers memlist[64];
- struct linux_mlist_p1275 avail[64], *mlist;
- unsigned long bytes, base_paddr;
- int num_regs, node = prom_finddevice("/memory");
- int i;
- num_regs = prom_getproperty(node, "available",
- (char *) memlist, sizeof(memlist));
- num_regs = (num_regs / sizeof(struct linux_prom64_registers));
- for (i = 0; i < num_regs; i++) {
- avail[i].start_adr = memlist[i].phys_addr;
- avail[i].num_bytes = memlist[i].reg_size;
- avail[i].theres_more = &avail[i + 1];
- }
- avail[i - 1].theres_more = NULL;
- sort_memlist(avail);
- mlist = &avail[0];
- i = 0;
- bytes = mlist->num_bytes;
- base_paddr = mlist->start_adr;
-
- sp_banks[0].base_addr = base_paddr;
- sp_banks[0].num_bytes = bytes;
- while (mlist->theres_more != NULL){
- i++;
- mlist = mlist->theres_more;
- bytes = mlist->num_bytes;
- if (i >= SPARC_PHYS_BANKS-1) {
- printk ("The machine has more banks than "
- "this kernel can supportn"
- "Increase the SPARC_PHYS_BANKS "
- "setting (currently %d)n",
- SPARC_PHYS_BANKS);
- i = SPARC_PHYS_BANKS-1;
- break;
- }
-
- sp_banks[i].base_addr = mlist->start_adr;
- sp_banks[i].num_bytes = mlist->num_bytes;
- }
- i++;
- sp_banks[i].base_addr = 0xdeadbeefbeefdeadUL;
- sp_banks[i].num_bytes = 0;
- for (i = 0; sp_banks[i].num_bytes != 0; i++)
- sp_banks[i].num_bytes &= PAGE_MASK;
- }
- static void __init taint_real_pages(void)
- {
- struct sparc_phys_banks saved_sp_banks[SPARC_PHYS_BANKS];
- int i;
- for (i = 0; i < SPARC_PHYS_BANKS; i++) {
- saved_sp_banks[i].base_addr =
- sp_banks[i].base_addr;
- saved_sp_banks[i].num_bytes =
- sp_banks[i].num_bytes;
- }
- rescan_sp_banks();
- /* Find changes discovered in the sp_bank rescan and
- * reserve the lost portions in the bootmem maps.
- */
- for (i = 0; saved_sp_banks[i].num_bytes; i++) {
- unsigned long old_start, old_end;
- old_start = saved_sp_banks[i].base_addr;
- old_end = old_start +
- saved_sp_banks[i].num_bytes;
- while (old_start < old_end) {
- int n;
- for (n = 0; sp_banks[n].num_bytes; n++) {
- unsigned long new_start, new_end;
- new_start = sp_banks[n].base_addr;
- new_end = new_start + sp_banks[n].num_bytes;
- 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, SMP_CACHE_BYTES, 0UL);
- 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 + phys_base;
- last = PAGE_ALIGN((unsigned long)&_end) -
- ((unsigned long) KERNBASE);
- last += PAGE_OFFSET + phys_base;
- while (addr < last) {
- set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap);
- addr += PAGE_SIZE;
- }
- taint_real_pages();
- max_mapnr = last_valid_pfn - (phys_base >> PAGE_SHIFT);
- high_memory = __va(last_valid_pfn << PAGE_SHIFT);
- 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, 0);
- if (mem_map_zero == NULL) {
- prom_printf("paging_init: Cannot alloc zero page.n");
- prom_halt();
- }
- SetPageReserved(mem_map_zero);
- clear_page(page_address(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;
- #ifndef CONFIG_SMP
- {
- /* Put empty_pg_dir on pgd_quicklist */
- extern pgd_t empty_pg_dir[1024];
- unsigned long addr = (unsigned long)empty_pg_dir;
- unsigned long alias_base = phys_base + PAGE_OFFSET -
- (long)(KERNBASE);
-
- memset(empty_pg_dir, 0, sizeof(empty_pg_dir));
- addr += alias_base;
- free_pgd_fast((pgd_t *)addr);
- num_physpages++;
- }
- #endif
- 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(phys_base)) -
- ((unsigned long) KERNBASE));
- p = virt_to_page(page);
- ClearPageReserved(p);
- set_page_count(p, 1);
- __free_page(p);
- num_physpages++;
- }
- }
- #ifdef CONFIG_BLK_DEV_INITRD
- void free_initrd_mem(unsigned long start, unsigned long end)
- {
- if (start < end)
- printk ("Freeing initrd memory: %ldk freedn", (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++;
- }
- }
- #endif
- void si_meminfo(struct sysinfo *val)
- {
- val->totalram = num_physpages;
- val->sharedram = 0;
- val->freeram = nr_free_pages();
- val->bufferram = atomic_read(&buffermem_pages);
- /* These are always zero on Sparc64. */
- val->totalhigh = 0;
- val->freehigh = 0;
- val->mem_unit = PAGE_SIZE;
- }