srmmu.c
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- /* $Id: srmmu.c,v 1.233 2001/11/13 00:49:27 davem Exp $
- * srmmu.c: SRMMU specific routines for memory management.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1995 Pete Zaitcev
- * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- * Copyright (C) 1999,2000 Anton Blanchard (anton@samba.org)
- */
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
- #include <linux/vmalloc.h>
- #include <linux/pagemap.h>
- #include <linux/init.h>
- #include <linux/blk.h>
- #include <linux/spinlock.h>
- #include <linux/bootmem.h>
- #include <linux/fs.h>
- #include <linux/seq_file.h>
- #include <asm/page.h>
- #include <asm/pgalloc.h>
- #include <asm/pgtable.h>
- #include <asm/io.h>
- #include <asm/kdebug.h>
- #include <asm/vaddrs.h>
- #include <asm/traps.h>
- #include <asm/smp.h>
- #include <asm/mbus.h>
- #include <asm/cache.h>
- #include <asm/oplib.h>
- #include <asm/sbus.h>
- #include <asm/asi.h>
- #include <asm/msi.h>
- #include <asm/a.out.h>
- #include <asm/mmu_context.h>
- #include <asm/io-unit.h>
- /* Now the cpu specific definitions. */
- #include <asm/viking.h>
- #include <asm/mxcc.h>
- #include <asm/ross.h>
- #include <asm/tsunami.h>
- #include <asm/swift.h>
- #include <asm/turbosparc.h>
- #include <asm/btfixup.h>
- enum mbus_module srmmu_modtype;
- unsigned int hwbug_bitmask;
- int vac_cache_size;
- int vac_line_size;
- extern struct resource sparc_iomap;
- extern unsigned long last_valid_pfn;
- extern unsigned long page_kernel;
- pgd_t *srmmu_swapper_pg_dir;
- #ifdef CONFIG_SMP
- #define FLUSH_BEGIN(mm)
- #define FLUSH_END
- #else
- #define FLUSH_BEGIN(mm) if((mm)->context != NO_CONTEXT) {
- #define FLUSH_END }
- #endif
- BTFIXUPDEF_CALL(void, flush_page_for_dma, unsigned long)
- #define flush_page_for_dma(page) BTFIXUP_CALL(flush_page_for_dma)(page)
- int flush_page_for_dma_global = 1;
- #ifdef CONFIG_SMP
- BTFIXUPDEF_CALL(void, local_flush_page_for_dma, unsigned long)
- #define local_flush_page_for_dma(page) BTFIXUP_CALL(local_flush_page_for_dma)(page)
- #endif
- char *srmmu_name;
- ctxd_t *srmmu_ctx_table_phys;
- ctxd_t *srmmu_context_table;
- int viking_mxcc_present;
- spinlock_t srmmu_context_spinlock = SPIN_LOCK_UNLOCKED;
- int is_hypersparc;
- /*
- * In general all page table modifications should use the V8 atomic
- * swap instruction. This insures the mmu and the cpu are in sync
- * with respect to ref/mod bits in the page tables.
- */
- static inline unsigned long srmmu_swap(unsigned long *addr, unsigned long value)
- {
- __asm__ __volatile__("swap [%2], %0" : "=&r" (value) : "0" (value), "r" (addr));
- return value;
- }
- static inline void srmmu_set_pte(pte_t *ptep, pte_t pteval)
- {
- srmmu_swap((unsigned long *)ptep, pte_val(pteval));
- }
- /* The very generic SRMMU page table operations. */
- static inline int srmmu_device_memory(unsigned long x)
- {
- return ((x & 0xF0000000) != 0);
- }
- int srmmu_cache_pagetables;
- /* these will be initialized in srmmu_nocache_calcsize() */
- int srmmu_nocache_npages;
- unsigned long srmmu_nocache_size;
- unsigned long srmmu_nocache_end;
- unsigned long pkmap_base;
- unsigned long pkmap_base_end;
- unsigned long srmmu_nocache_bitmap_size;
- extern unsigned long fix_kmap_begin;
- extern unsigned long fix_kmap_end;
- #define SRMMU_NOCACHE_BITMAP_SHIFT (PAGE_SHIFT - 4)
- void *srmmu_nocache_pool;
- void *srmmu_nocache_bitmap;
- int srmmu_nocache_low;
- int srmmu_nocache_used;
- spinlock_t srmmu_nocache_spinlock;
- /* This makes sense. Honest it does - Anton */
- #define __nocache_pa(VADDR) (((unsigned long)VADDR) - SRMMU_NOCACHE_VADDR + __pa((unsigned long)srmmu_nocache_pool))
- #define __nocache_va(PADDR) (__va((unsigned long)PADDR) - (unsigned long)srmmu_nocache_pool + SRMMU_NOCACHE_VADDR)
- #define __nocache_fix(VADDR) __va(__nocache_pa(VADDR))
- static inline unsigned long srmmu_pgd_page(pgd_t pgd)
- { return srmmu_device_memory(pgd_val(pgd))?~0:(unsigned long)__nocache_va((pgd_val(pgd) & SRMMU_PTD_PMASK) << 4); }
- static inline unsigned long srmmu_pmd_page(pmd_t pmd)
- { return srmmu_device_memory(pmd_val(pmd))?~0:(unsigned long)__nocache_va((pmd_val(pmd) & SRMMU_PTD_PMASK) << 4); }
- static inline struct page *srmmu_pte_page(pte_t pte)
- { return (mem_map + (unsigned long)(srmmu_device_memory(pte_val(pte))?~0:(((pte_val(pte) & SRMMU_PTE_PMASK) << 4) >> PAGE_SHIFT))); }
- static inline int srmmu_pte_none(pte_t pte)
- { return !(pte_val(pte) & 0xFFFFFFF); }
- static inline int srmmu_pte_present(pte_t pte)
- { return ((pte_val(pte) & SRMMU_ET_MASK) == SRMMU_ET_PTE); }
- static inline void srmmu_pte_clear(pte_t *ptep)
- { srmmu_set_pte(ptep, __pte(0)); }
- static inline int srmmu_pmd_none(pmd_t pmd)
- { return !(pmd_val(pmd) & 0xFFFFFFF); }
- static inline int srmmu_pmd_bad(pmd_t pmd)
- { return (pmd_val(pmd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
- static inline int srmmu_pmd_present(pmd_t pmd)
- { return ((pmd_val(pmd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
- static inline void srmmu_pmd_clear(pmd_t *pmdp)
- { srmmu_set_pte((pte_t *)pmdp, __pte(0)); }
- static inline int srmmu_pgd_none(pgd_t pgd)
- { return !(pgd_val(pgd) & 0xFFFFFFF); }
- static inline int srmmu_pgd_bad(pgd_t pgd)
- { return (pgd_val(pgd) & SRMMU_ET_MASK) != SRMMU_ET_PTD; }
- static inline int srmmu_pgd_present(pgd_t pgd)
- { return ((pgd_val(pgd) & SRMMU_ET_MASK) == SRMMU_ET_PTD); }
- static inline void srmmu_pgd_clear(pgd_t * pgdp)
- { srmmu_set_pte((pte_t *)pgdp, __pte(0)); }
- static inline int srmmu_pte_write(pte_t pte)
- { return pte_val(pte) & SRMMU_WRITE; }
- static inline int srmmu_pte_dirty(pte_t pte)
- { return pte_val(pte) & SRMMU_DIRTY; }
- static inline int srmmu_pte_young(pte_t pte)
- { return pte_val(pte) & SRMMU_REF; }
- static inline pte_t srmmu_pte_wrprotect(pte_t pte)
- { return __pte(pte_val(pte) & ~SRMMU_WRITE);}
- static inline pte_t srmmu_pte_mkclean(pte_t pte)
- { return __pte(pte_val(pte) & ~SRMMU_DIRTY);}
- static inline pte_t srmmu_pte_mkold(pte_t pte)
- { return __pte(pte_val(pte) & ~SRMMU_REF);}
- static inline pte_t srmmu_pte_mkwrite(pte_t pte)
- { return __pte(pte_val(pte) | SRMMU_WRITE);}
- static inline pte_t srmmu_pte_mkdirty(pte_t pte)
- { return __pte(pte_val(pte) | SRMMU_DIRTY);}
- static inline pte_t srmmu_pte_mkyoung(pte_t pte)
- { return __pte(pte_val(pte) | SRMMU_REF);}
- /*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- */
- static pte_t srmmu_mk_pte(struct page *page, pgprot_t pgprot)
- { return __pte((((page - mem_map) << PAGE_SHIFT) >> 4) | pgprot_val(pgprot)); }
- static pte_t srmmu_mk_pte_phys(unsigned long page, pgprot_t pgprot)
- { return __pte(((page) >> 4) | pgprot_val(pgprot)); }
- static pte_t srmmu_mk_pte_io(unsigned long page, pgprot_t pgprot, int space)
- { return __pte(((page) >> 4) | (space << 28) | pgprot_val(pgprot)); }
- /* XXX should we hyper_flush_whole_icache here - Anton */
- static inline void srmmu_ctxd_set(ctxd_t *ctxp, pgd_t *pgdp)
- { srmmu_set_pte((pte_t *)ctxp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pgdp) >> 4))); }
- static inline void srmmu_pgd_set(pgd_t * pgdp, pmd_t * pmdp)
- { srmmu_set_pte((pte_t *)pgdp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) pmdp) >> 4))); }
- static inline void srmmu_pmd_set(pmd_t * pmdp, pte_t * ptep)
- { srmmu_set_pte((pte_t *)pmdp, (SRMMU_ET_PTD | (__nocache_pa((unsigned long) ptep) >> 4))); }
- static inline pte_t srmmu_pte_modify(pte_t pte, pgprot_t newprot)
- { return __pte((pte_val(pte) & SRMMU_CHG_MASK) | pgprot_val(newprot)); }
- /* to find an entry in a top-level page table... */
- extern inline pgd_t *srmmu_pgd_offset(struct mm_struct * mm, unsigned long address)
- { return mm->pgd + (address >> SRMMU_PGDIR_SHIFT); }
- /* Find an entry in the second-level page table.. */
- static inline pmd_t *srmmu_pmd_offset(pgd_t * dir, unsigned long address)
- { return (pmd_t *) srmmu_pgd_page(*dir) + ((address >> SRMMU_PMD_SHIFT) & (SRMMU_PTRS_PER_PMD - 1)); }
- /* Find an entry in the third-level page table.. */
- static inline pte_t *srmmu_pte_offset(pmd_t * dir, unsigned long address)
- { return (pte_t *) srmmu_pmd_page(*dir) + ((address >> PAGE_SHIFT) & (SRMMU_PTRS_PER_PTE - 1)); }
- unsigned long __srmmu_get_nocache(int size, int align)
- {
- int offset = srmmu_nocache_low;
- int i;
- unsigned long va_tmp, phys_tmp;
- int lowest_failed = 0;
- size = size >> SRMMU_NOCACHE_BITMAP_SHIFT;
- spin_lock(&srmmu_nocache_spinlock);
- repeat:
- offset = find_next_zero_bit(srmmu_nocache_bitmap, srmmu_nocache_bitmap_size, offset);
- /* we align on physical address */
- if (align) {
- va_tmp = (SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT));
- phys_tmp = (__nocache_pa(va_tmp) + align - 1) & ~(align - 1);
- va_tmp = (unsigned long)__nocache_va(phys_tmp);
- offset = (va_tmp - SRMMU_NOCACHE_VADDR) >> SRMMU_NOCACHE_BITMAP_SHIFT;
- }
- if ((srmmu_nocache_bitmap_size - offset) < size) {
- printk("Run out of nocached RAM!n");
- spin_unlock(&srmmu_nocache_spinlock);
- return 0;
- }
- i = 0;
- while(i < size) {
- if (test_bit(offset + i, srmmu_nocache_bitmap)) {
- lowest_failed = 1;
- offset = offset + i + 1;
- goto repeat;
- }
- i++;
- }
- i = 0;
- while(i < size) {
- set_bit(offset + i, srmmu_nocache_bitmap);
- i++;
- srmmu_nocache_used++;
- }
- if (!lowest_failed && ((align >> SRMMU_NOCACHE_BITMAP_SHIFT) <= 1) && (offset > srmmu_nocache_low))
- srmmu_nocache_low = offset;
- spin_unlock(&srmmu_nocache_spinlock);
- return (SRMMU_NOCACHE_VADDR + (offset << SRMMU_NOCACHE_BITMAP_SHIFT));
- }
- unsigned inline long srmmu_get_nocache(int size, int align)
- {
- unsigned long tmp;
- tmp = __srmmu_get_nocache(size, align);
- if (tmp)
- memset((void *)tmp, 0, size);
- return tmp;
- }
- void srmmu_free_nocache(unsigned long vaddr, int size)
- {
- int offset = (vaddr - SRMMU_NOCACHE_VADDR) >> SRMMU_NOCACHE_BITMAP_SHIFT;
- size = size >> SRMMU_NOCACHE_BITMAP_SHIFT;
- spin_lock(&srmmu_nocache_spinlock);
- while(size--) {
- clear_bit(offset + size, srmmu_nocache_bitmap);
- srmmu_nocache_used--;
- }
- if (offset < srmmu_nocache_low)
- srmmu_nocache_low = offset;
- spin_unlock(&srmmu_nocache_spinlock);
- }
- void srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end);
- extern unsigned long probe_memory(void); /* in fault.c */
- /* Reserve nocache dynamically proportionally to the amount of
- * system RAM. -- Tomas Szepe <szepe@pinerecords.com>, June 2002
- */
- void srmmu_nocache_calcsize(void)
- {
- unsigned long sysmemavail = probe_memory() / 1024;
- srmmu_nocache_npages =
- sysmemavail / SRMMU_NOCACHE_ALCRATIO / 1024 * 256;
- if (sysmemavail % (SRMMU_NOCACHE_ALCRATIO * 1024))
- srmmu_nocache_npages += 256;
- /* anything above 1280 blows up */
- if (srmmu_nocache_npages > 1280) srmmu_nocache_npages = 1280;
- srmmu_nocache_size = srmmu_nocache_npages * PAGE_SIZE;
- srmmu_nocache_bitmap_size = srmmu_nocache_npages * 16;
- srmmu_nocache_end = SRMMU_NOCACHE_VADDR + srmmu_nocache_size;
- fix_kmap_begin = srmmu_nocache_end;
- fix_kmap_end = fix_kmap_begin + (KM_TYPE_NR * NR_CPUS - 1) * PAGE_SIZE;
- pkmap_base = SRMMU_NOCACHE_VADDR + srmmu_nocache_size + 0x40000;
- pkmap_base_end = pkmap_base + LAST_PKMAP * PAGE_SIZE;
- /* printk("system memory available = %luknnocache ram size = %lukn",
- sysmemavail, srmmu_nocache_size / 1024); */
- }
- void srmmu_nocache_init(void)
- {
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
- unsigned long paddr, vaddr;
- unsigned long pteval;
- srmmu_nocache_pool = __alloc_bootmem(srmmu_nocache_size, PAGE_SIZE, 0UL);
- memset(srmmu_nocache_pool, 0, srmmu_nocache_size);
- srmmu_nocache_bitmap = __alloc_bootmem(srmmu_nocache_bitmap_size, SMP_CACHE_BYTES, 0UL);
- memset(srmmu_nocache_bitmap, 0, srmmu_nocache_bitmap_size);
- srmmu_swapper_pg_dir = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
- memset(__nocache_fix(srmmu_swapper_pg_dir), 0, SRMMU_PGD_TABLE_SIZE);
- init_mm.pgd = srmmu_swapper_pg_dir;
- srmmu_early_allocate_ptable_skeleton(SRMMU_NOCACHE_VADDR, srmmu_nocache_end);
- spin_lock_init(&srmmu_nocache_spinlock);
- paddr = __pa((unsigned long)srmmu_nocache_pool);
- vaddr = SRMMU_NOCACHE_VADDR;
- while (vaddr < srmmu_nocache_end) {
- pgd = pgd_offset_k(vaddr);
- pmd = srmmu_pmd_offset(__nocache_fix(pgd), vaddr);
- pte = srmmu_pte_offset(__nocache_fix(pmd), vaddr);
- pteval = ((paddr >> 4) | SRMMU_ET_PTE | SRMMU_PRIV);
- if (srmmu_cache_pagetables)
- pteval |= SRMMU_CACHE;
- srmmu_set_pte(__nocache_fix(pte), pteval);
- vaddr += PAGE_SIZE;
- paddr += PAGE_SIZE;
- }
- flush_cache_all();
- flush_tlb_all();
- }
- static inline pgd_t *srmmu_get_pgd_fast(void)
- {
- pgd_t *pgd = NULL;
- pgd = (pgd_t *)__srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
- if (pgd) {
- pgd_t *init = pgd_offset_k(0);
- memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
- memcpy(pgd + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
- (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
- }
- return pgd;
- }
- static void srmmu_free_pgd_fast(pgd_t *pgd)
- {
- srmmu_free_nocache((unsigned long)pgd, SRMMU_PGD_TABLE_SIZE);
- }
- static pte_t *srmmu_pte_alloc_one_fast(struct mm_struct *mm, unsigned long address)
- {
- return (pte_t *)srmmu_get_nocache(SRMMU_PTE_TABLE_SIZE, SRMMU_PTE_TABLE_SIZE);
- }
- static pte_t *srmmu_pte_alloc_one(struct mm_struct *mm, unsigned long address)
- {
- return NULL;
- }
- static void srmmu_free_pte_fast(pte_t *pte)
- {
- srmmu_free_nocache((unsigned long)pte, SRMMU_PTE_TABLE_SIZE);
- }
- static pmd_t *srmmu_pmd_alloc_one_fast(struct mm_struct *mm, unsigned long address)
- {
- return (pmd_t *)srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
- }
- static void srmmu_free_pmd_fast(pmd_t * pmd)
- {
- srmmu_free_nocache((unsigned long)pmd, SRMMU_PMD_TABLE_SIZE);
- }
- static inline void alloc_context(struct mm_struct *old_mm, struct mm_struct *mm)
- {
- struct ctx_list *ctxp;
- ctxp = ctx_free.next;
- if(ctxp != &ctx_free) {
- remove_from_ctx_list(ctxp);
- add_to_used_ctxlist(ctxp);
- mm->context = ctxp->ctx_number;
- ctxp->ctx_mm = mm;
- return;
- }
- ctxp = ctx_used.next;
- if(ctxp->ctx_mm == old_mm)
- ctxp = ctxp->next;
- if(ctxp == &ctx_used)
- panic("out of mmu contexts");
- flush_cache_mm(ctxp->ctx_mm);
- flush_tlb_mm(ctxp->ctx_mm);
- remove_from_ctx_list(ctxp);
- add_to_used_ctxlist(ctxp);
- ctxp->ctx_mm->context = NO_CONTEXT;
- ctxp->ctx_mm = mm;
- mm->context = ctxp->ctx_number;
- }
- static inline void free_context(int context)
- {
- struct ctx_list *ctx_old;
- ctx_old = ctx_list_pool + context;
- remove_from_ctx_list(ctx_old);
- add_to_free_ctxlist(ctx_old);
- }
- static void srmmu_switch_mm(struct mm_struct *old_mm, struct mm_struct *mm,
- struct task_struct *tsk, int cpu)
- {
- if(mm->context == NO_CONTEXT) {
- spin_lock(&srmmu_context_spinlock);
- alloc_context(old_mm, mm);
- spin_unlock(&srmmu_context_spinlock);
- srmmu_ctxd_set(&srmmu_context_table[mm->context], mm->pgd);
- }
- if (is_hypersparc)
- hyper_flush_whole_icache();
- srmmu_set_context(mm->context);
- }
- /* Low level IO area allocation on the SRMMU. */
- void srmmu_mapioaddr(unsigned long physaddr, unsigned long virt_addr, int bus_type, int rdonly)
- {
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- unsigned long tmp;
- physaddr &= PAGE_MASK;
- pgdp = pgd_offset_k(virt_addr);
- pmdp = srmmu_pmd_offset(pgdp, virt_addr);
- ptep = srmmu_pte_offset(pmdp, virt_addr);
- tmp = (physaddr >> 4) | SRMMU_ET_PTE;
- /*
- * I need to test whether this is consistent over all
- * sun4m's. The bus_type represents the upper 4 bits of
- * 36-bit physical address on the I/O space lines...
- */
- tmp |= (bus_type << 28);
- if(rdonly)
- tmp |= SRMMU_PRIV_RDONLY;
- else
- tmp |= SRMMU_PRIV;
- __flush_page_to_ram(virt_addr);
- srmmu_set_pte(ptep, __pte(tmp));
- flush_tlb_all();
- }
- void srmmu_unmapioaddr(unsigned long virt_addr)
- {
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- pgdp = pgd_offset_k(virt_addr);
- pmdp = srmmu_pmd_offset(pgdp, virt_addr);
- ptep = srmmu_pte_offset(pmdp, virt_addr);
- /* No need to flush uncacheable page. */
- srmmu_pte_clear(ptep);
- flush_tlb_all();
- }
- /*
- * On the SRMMU we do not have the problems with limited tlb entries
- * for mapping kernel pages, so we just take things from the free page
- * pool. As a side effect we are putting a little too much pressure
- * on the gfp() subsystem. This setup also makes the logic of the
- * iommu mapping code a lot easier as we can transparently handle
- * mappings on the kernel stack without any special code as we did
- * need on the sun4c.
- */
- struct task_struct *srmmu_alloc_task_struct(void)
- {
- return (struct task_struct *) __get_free_pages(GFP_KERNEL, 1);
- }
- static void srmmu_free_task_struct(struct task_struct *tsk)
- {
- free_pages((unsigned long)tsk, 1);
- }
- static void srmmu_get_task_struct(struct task_struct *tsk)
- {
- atomic_inc(&virt_to_page(tsk)->count);
- }
- /* tsunami.S */
- extern void tsunami_flush_cache_all(void);
- extern void tsunami_flush_cache_mm(struct mm_struct *mm);
- extern void tsunami_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end);
- extern void tsunami_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
- extern void tsunami_flush_page_to_ram(unsigned long page);
- extern void tsunami_flush_page_for_dma(unsigned long page);
- extern void tsunami_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
- extern void tsunami_flush_tlb_all(void);
- extern void tsunami_flush_tlb_mm(struct mm_struct *mm);
- extern void tsunami_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end);
- extern void tsunami_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
- extern void tsunami_setup_blockops(void);
- /*
- * Workaround, until we find what's going on with Swift. When low on memory,
- * it sometimes loops in fault/handle_mm_fault incl. flush_tlb_page to find
- * out it is already in page tables/ fault again on the same instruction.
- * I really don't understand it, have checked it and contexts
- * are right, flush_tlb_all is done as well, and it faults again...
- * Strange. -jj
- *
- * The following code is a deadwood that may be necessary when
- * we start to make precise page flushes again. --zaitcev
- */
- static void swift_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
- {
- #if 0
- static unsigned long last;
- unsigned int val;
- /* unsigned int n; */
- if (address == last) {
- val = srmmu_hwprobe(address);
- if (val != 0 && pte_val(pte) != val) {
- printk("swift_update_mmu_cache: "
- "addr %lx put %08x probed %08x from %pn",
- address, pte_val(pte), val,
- __builtin_return_address(0));
- srmmu_flush_whole_tlb();
- }
- }
- last = address;
- #endif
- }
- /* swift.S */
- extern void swift_flush_cache_all(void);
- extern void swift_flush_cache_mm(struct mm_struct *mm);
- extern void swift_flush_cache_range(struct mm_struct *mm,
- unsigned long start, unsigned long end);
- extern void swift_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
- extern void swift_flush_page_to_ram(unsigned long page);
- extern void swift_flush_page_for_dma(unsigned long page);
- extern void swift_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
- extern void swift_flush_tlb_all(void);
- extern void swift_flush_tlb_mm(struct mm_struct *mm);
- extern void swift_flush_tlb_range(struct mm_struct *mm,
- unsigned long start, unsigned long end);
- extern void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
- #if 0 /* P3: deadwood to debug precise flushes on Swift. */
- void swift_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
- {
- int cctx, ctx1;
- page &= PAGE_MASK;
- if ((ctx1 = vma->vm_mm->context) != -1) {
- cctx = srmmu_get_context();
- /* Is context # ever different from current context? P3 */
- if (cctx != ctx1) {
- printk("flush ctx %02x curr %02xn", ctx1, cctx);
- srmmu_set_context(ctx1);
- swift_flush_page(page);
- __asm__ __volatile__("sta %%g0, [%0] %1nt" : :
- "r" (page), "i" (ASI_M_FLUSH_PROBE));
- srmmu_set_context(cctx);
- } else {
- /* Rm. prot. bits from virt. c. */
- /* swift_flush_cache_all(); */
- /* swift_flush_cache_page(vma, page); */
- swift_flush_page(page);
- __asm__ __volatile__("sta %%g0, [%0] %1nt" : :
- "r" (page), "i" (ASI_M_FLUSH_PROBE));
- /* same as above: srmmu_flush_tlb_page() */
- }
- }
- }
- #endif
- /*
- * The following are all MBUS based SRMMU modules, and therefore could
- * be found in a multiprocessor configuration. On the whole, these
- * chips seems to be much more touchy about DVMA and page tables
- * with respect to cache coherency.
- */
- /* Cypress flushes. */
- static void cypress_flush_cache_all(void)
- {
- volatile unsigned long cypress_sucks;
- unsigned long faddr, tagval;
- flush_user_windows();
- for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
- __asm__ __volatile__("lda [%1 + %2] %3, %0nt" :
- "=r" (tagval) :
- "r" (faddr), "r" (0x40000),
- "i" (ASI_M_DATAC_TAG));
- /* If modified and valid, kick it. */
- if((tagval & 0x60) == 0x60)
- cypress_sucks = *(unsigned long *)(0xf0020000 + faddr);
- }
- }
- static void cypress_flush_cache_mm(struct mm_struct *mm)
- {
- register unsigned long a, b, c, d, e, f, g;
- unsigned long flags, faddr;
- int octx;
- FLUSH_BEGIN(mm)
- flush_user_windows();
- __save_and_cli(flags);
- octx = srmmu_get_context();
- srmmu_set_context(mm->context);
- a = 0x20; b = 0x40; c = 0x60;
- d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
- faddr = (0x10000 - 0x100);
- goto inside;
- do {
- faddr -= 0x100;
- inside:
- __asm__ __volatile__("sta %%g0, [%0] %1nt"
- "sta %%g0, [%0 + %2] %1nt"
- "sta %%g0, [%0 + %3] %1nt"
- "sta %%g0, [%0 + %4] %1nt"
- "sta %%g0, [%0 + %5] %1nt"
- "sta %%g0, [%0 + %6] %1nt"
- "sta %%g0, [%0 + %7] %1nt"
- "sta %%g0, [%0 + %8] %1nt" : :
- "r" (faddr), "i" (ASI_M_FLUSH_CTX),
- "r" (a), "r" (b), "r" (c), "r" (d),
- "r" (e), "r" (f), "r" (g));
- } while(faddr);
- srmmu_set_context(octx);
- __restore_flags(flags);
- FLUSH_END
- }
- static void cypress_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end)
- {
- register unsigned long a, b, c, d, e, f, g;
- unsigned long flags, faddr;
- int octx;
- FLUSH_BEGIN(mm)
- flush_user_windows();
- __save_and_cli(flags);
- octx = srmmu_get_context();
- srmmu_set_context(mm->context);
- a = 0x20; b = 0x40; c = 0x60;
- d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
- start &= SRMMU_PMD_MASK;
- while(start < end) {
- faddr = (start + (0x10000 - 0x100));
- goto inside;
- do {
- faddr -= 0x100;
- inside:
- __asm__ __volatile__("sta %%g0, [%0] %1nt"
- "sta %%g0, [%0 + %2] %1nt"
- "sta %%g0, [%0 + %3] %1nt"
- "sta %%g0, [%0 + %4] %1nt"
- "sta %%g0, [%0 + %5] %1nt"
- "sta %%g0, [%0 + %6] %1nt"
- "sta %%g0, [%0 + %7] %1nt"
- "sta %%g0, [%0 + %8] %1nt" : :
- "r" (faddr),
- "i" (ASI_M_FLUSH_SEG),
- "r" (a), "r" (b), "r" (c), "r" (d),
- "r" (e), "r" (f), "r" (g));
- } while (faddr != start);
- start += SRMMU_PMD_SIZE;
- }
- srmmu_set_context(octx);
- __restore_flags(flags);
- FLUSH_END
- }
- static void cypress_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
- {
- register unsigned long a, b, c, d, e, f, g;
- struct mm_struct *mm = vma->vm_mm;
- unsigned long flags, line;
- int octx;
- FLUSH_BEGIN(mm)
- flush_user_windows();
- __save_and_cli(flags);
- octx = srmmu_get_context();
- srmmu_set_context(mm->context);
- a = 0x20; b = 0x40; c = 0x60;
- d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
- page &= PAGE_MASK;
- line = (page + PAGE_SIZE) - 0x100;
- goto inside;
- do {
- line -= 0x100;
- inside:
- __asm__ __volatile__("sta %%g0, [%0] %1nt"
- "sta %%g0, [%0 + %2] %1nt"
- "sta %%g0, [%0 + %3] %1nt"
- "sta %%g0, [%0 + %4] %1nt"
- "sta %%g0, [%0 + %5] %1nt"
- "sta %%g0, [%0 + %6] %1nt"
- "sta %%g0, [%0 + %7] %1nt"
- "sta %%g0, [%0 + %8] %1nt" : :
- "r" (line),
- "i" (ASI_M_FLUSH_PAGE),
- "r" (a), "r" (b), "r" (c), "r" (d),
- "r" (e), "r" (f), "r" (g));
- } while(line != page);
- srmmu_set_context(octx);
- __restore_flags(flags);
- FLUSH_END
- }
- /* Cypress is copy-back, at least that is how we configure it. */
- static void cypress_flush_page_to_ram(unsigned long page)
- {
- register unsigned long a, b, c, d, e, f, g;
- unsigned long line;
- a = 0x20; b = 0x40; c = 0x60; d = 0x80; e = 0xa0; f = 0xc0; g = 0xe0;
- page &= PAGE_MASK;
- line = (page + PAGE_SIZE) - 0x100;
- goto inside;
- do {
- line -= 0x100;
- inside:
- __asm__ __volatile__("sta %%g0, [%0] %1nt"
- "sta %%g0, [%0 + %2] %1nt"
- "sta %%g0, [%0 + %3] %1nt"
- "sta %%g0, [%0 + %4] %1nt"
- "sta %%g0, [%0 + %5] %1nt"
- "sta %%g0, [%0 + %6] %1nt"
- "sta %%g0, [%0 + %7] %1nt"
- "sta %%g0, [%0 + %8] %1nt" : :
- "r" (line),
- "i" (ASI_M_FLUSH_PAGE),
- "r" (a), "r" (b), "r" (c), "r" (d),
- "r" (e), "r" (f), "r" (g));
- } while(line != page);
- }
- /* Cypress is also IO cache coherent. */
- static void cypress_flush_page_for_dma(unsigned long page)
- {
- }
- /* Cypress has unified L2 VIPT, from which both instructions and data
- * are stored. It does not have an onboard icache of any sort, therefore
- * no flush is necessary.
- */
- static void cypress_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
- {
- }
- static void cypress_flush_tlb_all(void)
- {
- srmmu_flush_whole_tlb();
- }
- static void cypress_flush_tlb_mm(struct mm_struct *mm)
- {
- FLUSH_BEGIN(mm)
- __asm__ __volatile__(
- "lda [%0] %3, %%g5nt"
- "sta %2, [%0] %3nt"
- "sta %%g0, [%1] %4nt"
- "sta %%g5, [%0] %3n"
- : /* no outputs */
- : "r" (SRMMU_CTX_REG), "r" (0x300), "r" (mm->context),
- "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
- : "g5");
- FLUSH_END
- }
- static void cypress_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end)
- {
- unsigned long size;
- FLUSH_BEGIN(mm)
- start &= SRMMU_PGDIR_MASK;
- size = SRMMU_PGDIR_ALIGN(end) - start;
- __asm__ __volatile__(
- "lda [%0] %5, %%g5nt"
- "sta %1, [%0] %5n"
- "1:nt"
- "subcc %3, %4, %3nt"
- "bne 1bnt"
- " sta %%g0, [%2 + %3] %6nt"
- "sta %%g5, [%0] %5n"
- : /* no outputs */
- : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (start | 0x200),
- "r" (size), "r" (SRMMU_PGDIR_SIZE), "i" (ASI_M_MMUREGS),
- "i" (ASI_M_FLUSH_PROBE)
- : "g5", "cc");
- FLUSH_END
- }
- static void cypress_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
- {
- struct mm_struct *mm = vma->vm_mm;
- FLUSH_BEGIN(mm)
- __asm__ __volatile__(
- "lda [%0] %3, %%g5nt"
- "sta %1, [%0] %3nt"
- "sta %%g0, [%2] %4nt"
- "sta %%g5, [%0] %3n"
- : /* no outputs */
- : "r" (SRMMU_CTX_REG), "r" (mm->context), "r" (page & PAGE_MASK),
- "i" (ASI_M_MMUREGS), "i" (ASI_M_FLUSH_PROBE)
- : "g5");
- FLUSH_END
- }
- /* viking.S */
- extern void viking_flush_cache_all(void);
- extern void viking_flush_cache_mm(struct mm_struct *mm);
- extern void viking_flush_cache_range(struct mm_struct *mm, unsigned long start,
- unsigned long end);
- extern void viking_flush_cache_page(struct vm_area_struct *vma,
- unsigned long page);
- extern void viking_flush_page_to_ram(unsigned long page);
- extern void viking_flush_page_for_dma(unsigned long page);
- extern void viking_flush_sig_insns(struct mm_struct *mm, unsigned long addr);
- extern void viking_flush_page(unsigned long page);
- extern void viking_mxcc_flush_page(unsigned long page);
- extern void viking_flush_tlb_all(void);
- extern void viking_flush_tlb_mm(struct mm_struct *mm);
- extern void viking_flush_tlb_range(struct mm_struct *mm, unsigned long start,
- unsigned long end);
- extern void viking_flush_tlb_page(struct vm_area_struct *vma,
- unsigned long page);
- extern void sun4dsmp_flush_tlb_all(void);
- extern void sun4dsmp_flush_tlb_mm(struct mm_struct *mm);
- extern void sun4dsmp_flush_tlb_range(struct mm_struct *mm, unsigned long start,
- unsigned long end);
- extern void sun4dsmp_flush_tlb_page(struct vm_area_struct *vma,
- unsigned long page);
- /* hypersparc.S */
- extern void hypersparc_flush_cache_all(void);
- extern void hypersparc_flush_cache_mm(struct mm_struct *mm);
- extern void hypersparc_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end);
- extern void hypersparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page);
- extern void hypersparc_flush_page_to_ram(unsigned long page);
- extern void hypersparc_flush_page_for_dma(unsigned long page);
- extern void hypersparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr);
- extern void hypersparc_flush_tlb_all(void);
- extern void hypersparc_flush_tlb_mm(struct mm_struct *mm);
- extern void hypersparc_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end);
- extern void hypersparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page);
- extern void hypersparc_setup_blockops(void);
- /*
- * NOTE: All of this startup code assumes the low 16mb (approx.) of
- * kernel mappings are done with one single contiguous chunk of
- * ram. On small ram machines (classics mainly) we only get
- * around 8mb mapped for us.
- */
- void __init early_pgtable_allocfail(char *type)
- {
- prom_printf("inherit_prom_mappings: Cannot alloc kernel %s.n", type);
- prom_halt();
- }
- void __init srmmu_early_allocate_ptable_skeleton(unsigned long start, unsigned long end)
- {
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- while(start < end) {
- pgdp = pgd_offset_k(start);
- if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
- pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
- if (pmdp == NULL)
- early_pgtable_allocfail("pmd");
- memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
- srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
- }
- pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
- if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
- ptep = (pte_t *)__srmmu_get_nocache(SRMMU_PTE_TABLE_SIZE, SRMMU_PTE_TABLE_SIZE);
- if (ptep == NULL)
- early_pgtable_allocfail("pte");
- memset(__nocache_fix(ptep), 0, SRMMU_PTE_TABLE_SIZE);
- srmmu_pmd_set(__nocache_fix(pmdp), ptep);
- }
- start = (start + SRMMU_PMD_SIZE) & SRMMU_PMD_MASK;
- }
- }
- void __init srmmu_allocate_ptable_skeleton(unsigned long start, unsigned long end)
- {
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- while(start < end) {
- pgdp = pgd_offset_k(start);
- if(srmmu_pgd_none(*pgdp)) {
- pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
- if (pmdp == NULL)
- early_pgtable_allocfail("pmd");
- memset(pmdp, 0, SRMMU_PMD_TABLE_SIZE);
- srmmu_pgd_set(pgdp, pmdp);
- }
- pmdp = srmmu_pmd_offset(pgdp, start);
- if(srmmu_pmd_none(*pmdp)) {
- ptep = (pte_t *)__srmmu_get_nocache(SRMMU_PTE_TABLE_SIZE, SRMMU_PTE_TABLE_SIZE);
- if (ptep == NULL)
- early_pgtable_allocfail("pte");
- memset(ptep, 0, SRMMU_PTE_TABLE_SIZE);
- srmmu_pmd_set(pmdp, ptep);
- }
- start = (start + SRMMU_PMD_SIZE) & SRMMU_PMD_MASK;
- }
- }
- /*
- * This is much cleaner than poking around physical address space
- * looking at the prom's page table directly which is what most
- * other OS's do. Yuck... this is much better.
- */
- void __init srmmu_inherit_prom_mappings(unsigned long start,unsigned long end)
- {
- pgd_t *pgdp;
- pmd_t *pmdp;
- pte_t *ptep;
- int what = 0; /* 0 = normal-pte, 1 = pmd-level pte, 2 = pgd-level pte */
- unsigned long prompte;
- while(start <= end) {
- if (start == 0)
- break; /* probably wrap around */
- if(start == 0xfef00000)
- start = KADB_DEBUGGER_BEGVM;
- if(!(prompte = srmmu_hwprobe(start))) {
- start += PAGE_SIZE;
- continue;
- }
-
- /* A red snapper, see what it really is. */
- what = 0;
-
- if(!(start & ~(SRMMU_PMD_MASK))) {
- if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PMD_SIZE) == prompte)
- what = 1;
- }
-
- if(!(start & ~(SRMMU_PGDIR_MASK))) {
- if(srmmu_hwprobe((start-PAGE_SIZE) + SRMMU_PGDIR_SIZE) ==
- prompte)
- what = 2;
- }
-
- pgdp = pgd_offset_k(start);
- if(what == 2) {
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(prompte);
- start += SRMMU_PGDIR_SIZE;
- continue;
- }
- if(srmmu_pgd_none(*(pgd_t *)__nocache_fix(pgdp))) {
- pmdp = (pmd_t *)__srmmu_get_nocache(SRMMU_PMD_TABLE_SIZE, SRMMU_PMD_TABLE_SIZE);
- if (pmdp == NULL)
- early_pgtable_allocfail("pmd");
- memset(__nocache_fix(pmdp), 0, SRMMU_PMD_TABLE_SIZE);
- srmmu_pgd_set(__nocache_fix(pgdp), pmdp);
- }
- pmdp = srmmu_pmd_offset(__nocache_fix(pgdp), start);
- if(what == 1) {
- *(pmd_t *)__nocache_fix(pmdp) = __pmd(prompte);
- start += SRMMU_PMD_SIZE;
- continue;
- }
- if(srmmu_pmd_none(*(pmd_t *)__nocache_fix(pmdp))) {
- ptep = (pte_t *)__srmmu_get_nocache(SRMMU_PTE_TABLE_SIZE, SRMMU_PTE_TABLE_SIZE);
- if (ptep == NULL)
- early_pgtable_allocfail("pte");
- memset(__nocache_fix(ptep), 0, SRMMU_PTE_TABLE_SIZE);
- srmmu_pmd_set(__nocache_fix(pmdp), ptep);
- }
- ptep = srmmu_pte_offset(__nocache_fix(pmdp), start);
- *(pte_t *)__nocache_fix(ptep) = __pte(prompte);
- start += PAGE_SIZE;
- }
- }
- #define KERNEL_PTE(page_shifted) ((page_shifted)|SRMMU_CACHE|SRMMU_PRIV|SRMMU_VALID)
- /* Create a third-level SRMMU 16MB page mapping. */
- static void __init do_large_mapping(unsigned long vaddr, unsigned long phys_base)
- {
- pgd_t *pgdp = pgd_offset_k(vaddr);
- unsigned long big_pte;
- big_pte = KERNEL_PTE(phys_base >> 4);
- *(pgd_t *)__nocache_fix(pgdp) = __pgd(big_pte);
- }
- /* Map sp_bank entry SP_ENTRY, starting at virtual address VBASE. */
- static unsigned long __init map_spbank(unsigned long vbase, int sp_entry)
- {
- unsigned long pstart = (sp_banks[sp_entry].base_addr & SRMMU_PGDIR_MASK);
- unsigned long vstart = (vbase & SRMMU_PGDIR_MASK);
- unsigned long vend = SRMMU_PGDIR_ALIGN(vbase + sp_banks[sp_entry].num_bytes);
- /* Map "low" memory only */
- const unsigned long min_vaddr = PAGE_OFFSET;
- const unsigned long max_vaddr = PAGE_OFFSET + SRMMU_MAXMEM;
- if (vstart < min_vaddr || vstart >= max_vaddr)
- return vstart;
-
- if (vend > max_vaddr || vend < min_vaddr)
- vend = max_vaddr;
- while(vstart < vend) {
- do_large_mapping(vstart, pstart);
- vstart += SRMMU_PGDIR_SIZE; pstart += SRMMU_PGDIR_SIZE;
- }
- return vstart;
- }
- static inline void memprobe_error(char *msg)
- {
- prom_printf(msg);
- prom_printf("Halting now...n");
- prom_halt();
- }
- static inline void map_kernel(void)
- {
- int i;
- if (phys_base > 0) {
- do_large_mapping(PAGE_OFFSET, phys_base);
- }
- for (i = 0; sp_banks[i].num_bytes != 0; i++) {
- map_spbank((unsigned long)__va(sp_banks[i].base_addr), i);
- }
- BTFIXUPSET_SIMM13(user_ptrs_per_pgd, PAGE_OFFSET / SRMMU_PGDIR_SIZE);
- }
- /* Paging initialization on the Sparc Reference MMU. */
- extern void sparc_context_init(int);
- extern int linux_num_cpus;
- extern unsigned long totalhigh_pages;
- void (*poke_srmmu)(void) __initdata = NULL;
- extern unsigned long bootmem_init(unsigned long *pages_avail);
- extern void sun_serial_setup(void);
- void __init srmmu_paging_init(void)
- {
- int i, cpunode;
- char node_str[128];
- pgd_t *pgd;
- pmd_t *pmd;
- pte_t *pte;
- unsigned long pages_avail;
- sparc_iomap.start = SUN4M_IOBASE_VADDR; /* 16MB of IOSPACE on all sun4m's. */
- if (sparc_cpu_model == sun4d)
- num_contexts = 65536; /* We know it is Viking */
- else {
- /* Find the number of contexts on the srmmu. */
- cpunode = prom_getchild(prom_root_node);
- num_contexts = 0;
- while(cpunode != 0) {
- prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
- num_contexts = prom_getintdefault(cpunode, "mmu-nctx", 0x8);
- break;
- }
- cpunode = prom_getsibling(cpunode);
- }
- }
- if(!num_contexts) {
- prom_printf("Something wrong, can't find cpu node in paging_init.n");
- prom_halt();
- }
- pages_avail = 0;
- last_valid_pfn = bootmem_init(&pages_avail);
- srmmu_nocache_calcsize();
- srmmu_nocache_init();
- srmmu_inherit_prom_mappings(0xfe400000,(LINUX_OPPROM_ENDVM-PAGE_SIZE));
- map_kernel();
- /* ctx table has to be physically aligned to its size */
- srmmu_context_table = (ctxd_t *)__srmmu_get_nocache(num_contexts*sizeof(ctxd_t), num_contexts*sizeof(ctxd_t));
- srmmu_ctx_table_phys = (ctxd_t *)__nocache_pa((unsigned long)srmmu_context_table);
- for(i = 0; i < num_contexts; i++)
- srmmu_ctxd_set((ctxd_t *)__nocache_fix(&srmmu_context_table[i]), srmmu_swapper_pg_dir);
- flush_cache_all();
- srmmu_set_ctable_ptr((unsigned long)srmmu_ctx_table_phys);
- flush_tlb_all();
- poke_srmmu();
- #if CONFIG_SUN_IO
- srmmu_allocate_ptable_skeleton(sparc_iomap.start, IOBASE_END);
- srmmu_allocate_ptable_skeleton(DVMA_VADDR, DVMA_END);
- #endif
- srmmu_allocate_ptable_skeleton(fix_kmap_begin, fix_kmap_end);
- srmmu_allocate_ptable_skeleton(pkmap_base, pkmap_base_end);
- pgd = pgd_offset_k(pkmap_base);
- pmd = pmd_offset(pgd, pkmap_base);
- pte = pte_offset(pmd, pkmap_base);
- pkmap_page_table = pte;
- flush_cache_all();
- flush_tlb_all();
- /*
- * 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();
- sparc_context_init(num_contexts);
- kmap_init();
- {
- 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 = max_low_pfn - (phys_base >> PAGE_SHIFT);
- zones_size[ZONE_DMA] = npages;
- zholes_size[ZONE_DMA] = npages - pages_avail;
- npages = highend_pfn - max_low_pfn;
- zones_size[ZONE_HIGHMEM] = npages;
- zholes_size[ZONE_HIGHMEM] = npages - calc_highpages();
- free_area_init_node(0, NULL, NULL, zones_size,
- phys_base, zholes_size);
- }
- }
- static void srmmu_mmu_info(struct seq_file *m)
- {
- seq_printf(m,
- "MMU typet: %sn"
- "contextst: %dn"
- "nocache totalt: %ldn"
- "nocache usedt: %dn",
- srmmu_name,
- num_contexts,
- srmmu_nocache_size,
- (srmmu_nocache_used << SRMMU_NOCACHE_BITMAP_SHIFT));
- }
- static void srmmu_update_mmu_cache(struct vm_area_struct * vma, unsigned long address, pte_t pte)
- {
- }
- static void srmmu_destroy_context(struct mm_struct *mm)
- {
- if(mm->context != NO_CONTEXT) {
- flush_cache_mm(mm);
- srmmu_ctxd_set(&srmmu_context_table[mm->context], srmmu_swapper_pg_dir);
- flush_tlb_mm(mm);
- spin_lock(&srmmu_context_spinlock);
- free_context(mm->context);
- spin_unlock(&srmmu_context_spinlock);
- mm->context = NO_CONTEXT;
- }
- }
- /* Init various srmmu chip types. */
- static void __init srmmu_is_bad(void)
- {
- prom_printf("Could not determine SRMMU chip type.n");
- prom_halt();
- }
- static void __init init_vac_layout(void)
- {
- int nd, cache_lines;
- char node_str[128];
- #ifdef CONFIG_SMP
- int cpu = 0;
- unsigned long max_size = 0;
- unsigned long min_line_size = 0x10000000;
- #endif
- nd = prom_getchild(prom_root_node);
- while((nd = prom_getsibling(nd)) != 0) {
- prom_getstring(nd, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
- vac_line_size = prom_getint(nd, "cache-line-size");
- if (vac_line_size == -1) {
- prom_printf("can't determine cache-line-size, "
- "halting.n");
- prom_halt();
- }
- cache_lines = prom_getint(nd, "cache-nlines");
- if (cache_lines == -1) {
- prom_printf("can't determine cache-nlines, halting.n");
- prom_halt();
- }
- vac_cache_size = cache_lines * vac_line_size;
- #ifdef CONFIG_SMP
- if(vac_cache_size > max_size)
- max_size = vac_cache_size;
- if(vac_line_size < min_line_size)
- min_line_size = vac_line_size;
- cpu++;
- if(cpu == smp_num_cpus)
- break;
- #else
- break;
- #endif
- }
- }
- if(nd == 0) {
- prom_printf("No CPU nodes found, halting.n");
- prom_halt();
- }
- #ifdef CONFIG_SMP
- vac_cache_size = max_size;
- vac_line_size = min_line_size;
- #endif
- printk("SRMMU: Using VAC size of %d bytes, line size %d bytes.n",
- (int)vac_cache_size, (int)vac_line_size);
- }
- static void __init poke_hypersparc(void)
- {
- volatile unsigned long clear;
- unsigned long mreg = srmmu_get_mmureg();
- hyper_flush_unconditional_combined();
- mreg &= ~(HYPERSPARC_CWENABLE);
- mreg |= (HYPERSPARC_CENABLE | HYPERSPARC_WBENABLE);
- mreg |= (HYPERSPARC_CMODE);
- srmmu_set_mmureg(mreg);
- #if 0 /* XXX I think this is bad news... -DaveM */
- hyper_clear_all_tags();
- #endif
- put_ross_icr(HYPERSPARC_ICCR_FTD | HYPERSPARC_ICCR_ICE);
- hyper_flush_whole_icache();
- clear = srmmu_get_faddr();
- clear = srmmu_get_fstatus();
- }
- static void __init init_hypersparc(void)
- {
- srmmu_name = "ROSS HyperSparc";
- init_vac_layout();
- is_hypersparc = 1;
- BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_all, hypersparc_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, hypersparc_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, hypersparc_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, hypersparc_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_all, hypersparc_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, hypersparc_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, hypersparc_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, hypersparc_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__flush_page_to_ram, hypersparc_flush_page_to_ram, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_sig_insns, hypersparc_flush_sig_insns, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_page_for_dma, hypersparc_flush_page_for_dma, BTFIXUPCALL_NOP);
- poke_srmmu = poke_hypersparc;
- hypersparc_setup_blockops();
- }
- static void __init poke_cypress(void)
- {
- unsigned long mreg = srmmu_get_mmureg();
- unsigned long faddr, tagval;
- volatile unsigned long cypress_sucks;
- volatile unsigned long clear;
- clear = srmmu_get_faddr();
- clear = srmmu_get_fstatus();
- if (!(mreg & CYPRESS_CENABLE)) {
- for(faddr = 0x0; faddr < 0x10000; faddr += 20) {
- __asm__ __volatile__("sta %%g0, [%0 + %1] %2nt"
- "sta %%g0, [%0] %2nt" : :
- "r" (faddr), "r" (0x40000),
- "i" (ASI_M_DATAC_TAG));
- }
- } else {
- for(faddr = 0; faddr < 0x10000; faddr += 0x20) {
- __asm__ __volatile__("lda [%1 + %2] %3, %0nt" :
- "=r" (tagval) :
- "r" (faddr), "r" (0x40000),
- "i" (ASI_M_DATAC_TAG));
- /* If modified and valid, kick it. */
- if((tagval & 0x60) == 0x60)
- cypress_sucks = *(unsigned long *)
- (0xf0020000 + faddr);
- }
- }
- /* And one more, for our good neighbor, Mr. Broken Cypress. */
- clear = srmmu_get_faddr();
- clear = srmmu_get_fstatus();
- mreg |= (CYPRESS_CENABLE | CYPRESS_CMODE);
- srmmu_set_mmureg(mreg);
- }
- static void __init init_cypress_common(void)
- {
- init_vac_layout();
- BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_all, cypress_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, cypress_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, cypress_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, cypress_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_all, cypress_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, cypress_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, cypress_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, cypress_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__flush_page_to_ram, cypress_flush_page_to_ram, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_sig_insns, cypress_flush_sig_insns, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(flush_page_for_dma, cypress_flush_page_for_dma, BTFIXUPCALL_NOP);
- poke_srmmu = poke_cypress;
- }
- static void __init init_cypress_604(void)
- {
- srmmu_name = "ROSS Cypress-604(UP)";
- srmmu_modtype = Cypress;
- init_cypress_common();
- }
- static void __init init_cypress_605(unsigned long mrev)
- {
- srmmu_name = "ROSS Cypress-605(MP)";
- if(mrev == 0xe) {
- srmmu_modtype = Cypress_vE;
- hwbug_bitmask |= HWBUG_COPYBACK_BROKEN;
- } else {
- if(mrev == 0xd) {
- srmmu_modtype = Cypress_vD;
- hwbug_bitmask |= HWBUG_ASIFLUSH_BROKEN;
- } else {
- srmmu_modtype = Cypress;
- }
- }
- init_cypress_common();
- }
- static void __init poke_swift(void)
- {
- unsigned long mreg;
- /* Clear any crap from the cache or else... */
- swift_flush_cache_all();
- /* Enable I & D caches */
- mreg = srmmu_get_mmureg();
- mreg |= (SWIFT_IE | SWIFT_DE);
- /*
- * The Swift branch folding logic is completely broken. At
- * trap time, if things are just right, if can mistakenly
- * think that a trap is coming from kernel mode when in fact
- * it is coming from user mode (it mis-executes the branch in
- * the trap code). So you see things like crashme completely
- * hosing your machine which is completely unacceptable. Turn
- * this shit off... nice job Fujitsu.
- */
- mreg &= ~(SWIFT_BF);
- srmmu_set_mmureg(mreg);
- }
- #define SWIFT_MASKID_ADDR 0x10003018
- static void __init init_swift(void)
- {
- unsigned long swift_rev;
- __asm__ __volatile__("lda [%1] %2, %0nt"
- "srl %0, 0x18, %0nt" :
- "=r" (swift_rev) :
- "r" (SWIFT_MASKID_ADDR), "i" (ASI_M_BYPASS));
- srmmu_name = "Fujitsu Swift";
- switch(swift_rev) {
- case 0x11:
- case 0x20:
- case 0x23:
- case 0x30:
- srmmu_modtype = Swift_lots_o_bugs;
- hwbug_bitmask |= (HWBUG_KERN_ACCBROKEN | HWBUG_KERN_CBITBROKEN);
- /*
- * Gee george, I wonder why Sun is so hush hush about
- * this hardware bug... really braindamage stuff going
- * on here. However I think we can find a way to avoid
- * all of the workaround overhead under Linux. Basically,
- * any page fault can cause kernel pages to become user
- * accessible (the mmu gets confused and clears some of
- * the ACC bits in kernel ptes). Aha, sounds pretty
- * horrible eh? But wait, after extensive testing it appears
- * that if you use pgd_t level large kernel pte's (like the
- * 4MB pages on the Pentium) the bug does not get tripped
- * at all. This avoids almost all of the major overhead.
- * Welcome to a world where your vendor tells you to,
- * "apply this kernel patch" instead of "sorry for the
- * broken hardware, send it back and we'll give you
- * properly functioning parts"
- */
- break;
- case 0x25:
- case 0x31:
- srmmu_modtype = Swift_bad_c;
- hwbug_bitmask |= HWBUG_KERN_CBITBROKEN;
- /*
- * You see Sun allude to this hardware bug but never
- * admit things directly, they'll say things like,
- * "the Swift chip cache problems" or similar.
- */
- break;
- default:
- srmmu_modtype = Swift_ok;
- break;
- };
- BTFIXUPSET_CALL(flush_cache_all, swift_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, swift_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, swift_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, swift_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_all, swift_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, swift_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, swift_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, swift_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__flush_page_to_ram, swift_flush_page_to_ram, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_sig_insns, swift_flush_sig_insns, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_page_for_dma, swift_flush_page_for_dma, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(update_mmu_cache, swift_update_mmu_cache, BTFIXUPCALL_NORM);
- flush_page_for_dma_global = 0;
- /*
- * Are you now convinced that the Swift is one of the
- * biggest VLSI abortions of all time? Bravo Fujitsu!
- * Fujitsu, the !#?!%$'d up processor people. I bet if
- * you examined the microcode of the Swift you'd find
- * XXX's all over the place.
- */
- poke_srmmu = poke_swift;
- }
- static void turbosparc_flush_cache_all(void)
- {
- flush_user_windows();
- turbosparc_idflash_clear();
- }
- static void turbosparc_flush_cache_mm(struct mm_struct *mm)
- {
- FLUSH_BEGIN(mm)
- flush_user_windows();
- turbosparc_idflash_clear();
- FLUSH_END
- }
- static void turbosparc_flush_cache_range(struct mm_struct *mm, unsigned long start, unsigned long end)
- {
- FLUSH_BEGIN(mm)
- flush_user_windows();
- turbosparc_idflash_clear();
- FLUSH_END
- }
- static void turbosparc_flush_cache_page(struct vm_area_struct *vma, unsigned long page)
- {
- FLUSH_BEGIN(vma->vm_mm)
- flush_user_windows();
- if (vma->vm_flags & VM_EXEC)
- turbosparc_flush_icache();
- turbosparc_flush_dcache();
- FLUSH_END
- }
- /* TurboSparc is copy-back, if we turn it on, but this does not work. */
- static void turbosparc_flush_page_to_ram(unsigned long page)
- {
- #ifdef TURBOSPARC_WRITEBACK
- volatile unsigned long clear;
- if (srmmu_hwprobe(page))
- turbosparc_flush_page_cache(page);
- clear = srmmu_get_fstatus();
- #endif
- }
- static void turbosparc_flush_sig_insns(struct mm_struct *mm, unsigned long insn_addr)
- {
- }
- static void turbosparc_flush_page_for_dma(unsigned long page)
- {
- turbosparc_flush_dcache();
- }
- static void turbosparc_flush_tlb_all(void)
- {
- srmmu_flush_whole_tlb();
- }
- static void turbosparc_flush_tlb_mm(struct mm_struct *mm)
- {
- FLUSH_BEGIN(mm)
- srmmu_flush_whole_tlb();
- FLUSH_END
- }
- static void turbosparc_flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end)
- {
- FLUSH_BEGIN(mm)
- srmmu_flush_whole_tlb();
- FLUSH_END
- }
- static void turbosparc_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
- {
- FLUSH_BEGIN(vma->vm_mm)
- srmmu_flush_whole_tlb();
- FLUSH_END
- }
- static void __init poke_turbosparc(void)
- {
- unsigned long mreg = srmmu_get_mmureg();
- unsigned long ccreg;
- /* Clear any crap from the cache or else... */
- turbosparc_flush_cache_all();
- mreg &= ~(TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* Temporarily disable I & D caches */
- mreg &= ~(TURBOSPARC_PCENABLE); /* Don't check parity */
- srmmu_set_mmureg(mreg);
-
- ccreg = turbosparc_get_ccreg();
- #ifdef TURBOSPARC_WRITEBACK
- ccreg |= (TURBOSPARC_SNENABLE); /* Do DVMA snooping in Dcache */
- ccreg &= ~(TURBOSPARC_uS2 | TURBOSPARC_WTENABLE);
- /* Write-back D-cache, emulate VLSI
- * abortion number three, not number one */
- #else
- /* For now let's play safe, optimize later */
- ccreg |= (TURBOSPARC_SNENABLE | TURBOSPARC_WTENABLE);
- /* Do DVMA snooping in Dcache, Write-thru D-cache */
- ccreg &= ~(TURBOSPARC_uS2);
- /* Emulate VLSI abortion number three, not number one */
- #endif
- switch (ccreg & 7) {
- case 0: /* No SE cache */
- case 7: /* Test mode */
- break;
- default:
- ccreg |= (TURBOSPARC_SCENABLE);
- }
- turbosparc_set_ccreg (ccreg);
- mreg |= (TURBOSPARC_ICENABLE | TURBOSPARC_DCENABLE); /* I & D caches on */
- mreg |= (TURBOSPARC_ICSNOOP); /* Icache snooping on */
- srmmu_set_mmureg(mreg);
- }
- static void __init init_turbosparc(void)
- {
- srmmu_name = "Fujitsu TurboSparc";
- srmmu_modtype = TurboSparc;
- BTFIXUPSET_CALL(flush_cache_all, turbosparc_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, turbosparc_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, turbosparc_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, turbosparc_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_all, turbosparc_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, turbosparc_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, turbosparc_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, turbosparc_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__flush_page_to_ram, turbosparc_flush_page_to_ram, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_sig_insns, turbosparc_flush_sig_insns, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(flush_page_for_dma, turbosparc_flush_page_for_dma, BTFIXUPCALL_NORM);
- poke_srmmu = poke_turbosparc;
- }
- static void __init poke_tsunami(void)
- {
- unsigned long mreg = srmmu_get_mmureg();
- tsunami_flush_icache();
- tsunami_flush_dcache();
- mreg &= ~TSUNAMI_ITD;
- mreg |= (TSUNAMI_IENAB | TSUNAMI_DENAB);
- srmmu_set_mmureg(mreg);
- }
- static void __init init_tsunami(void)
- {
- /*
- * Tsunami's pretty sane, Sun and TI actually got it
- * somewhat right this time. Fujitsu should have
- * taken some lessons from them.
- */
- srmmu_name = "TI Tsunami";
- srmmu_modtype = Tsunami;
- BTFIXUPSET_CALL(flush_cache_all, tsunami_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, tsunami_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, tsunami_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, tsunami_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_all, tsunami_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, tsunami_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, tsunami_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, tsunami_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(__flush_page_to_ram, tsunami_flush_page_to_ram, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(flush_sig_insns, tsunami_flush_sig_insns, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_page_for_dma, tsunami_flush_page_for_dma, BTFIXUPCALL_NORM);
- poke_srmmu = poke_tsunami;
- tsunami_setup_blockops();
- }
- static void __init poke_viking(void)
- {
- unsigned long mreg = srmmu_get_mmureg();
- static int smp_catch;
- if(viking_mxcc_present) {
- unsigned long mxcc_control = mxcc_get_creg();
- mxcc_control |= (MXCC_CTL_ECE | MXCC_CTL_PRE | MXCC_CTL_MCE);
- mxcc_control &= ~(MXCC_CTL_RRC);
- mxcc_set_creg(mxcc_control);
- /*
- * We don't need memory parity checks.
- * XXX This is a mess, have to dig out later. ecd.
- viking_mxcc_turn_off_parity(&mreg, &mxcc_control);
- */
- /* We do cache ptables on MXCC. */
- mreg |= VIKING_TCENABLE;
- } else {
- unsigned long bpreg;
- mreg &= ~(VIKING_TCENABLE);
- if(smp_catch++) {
- /* Must disable mixed-cmd mode here for other cpu's. */
- bpreg = viking_get_bpreg();
- bpreg &= ~(VIKING_ACTION_MIX);
- viking_set_bpreg(bpreg);
- /* Just in case PROM does something funny. */
- msi_set_sync();
- }
- }
- mreg |= VIKING_SPENABLE;
- mreg |= (VIKING_ICENABLE | VIKING_DCENABLE);
- mreg |= VIKING_SBENABLE;
- mreg &= ~(VIKING_ACENABLE);
- srmmu_set_mmureg(mreg);
- #ifdef CONFIG_SMP
- /* Avoid unnecessary cross calls. */
- BTFIXUPCOPY_CALL(flush_cache_all, local_flush_cache_all);
- BTFIXUPCOPY_CALL(flush_cache_mm, local_flush_cache_mm);
- BTFIXUPCOPY_CALL(flush_cache_range, local_flush_cache_range);
- BTFIXUPCOPY_CALL(flush_cache_page, local_flush_cache_page);
- BTFIXUPCOPY_CALL(__flush_page_to_ram, local_flush_page_to_ram);
- BTFIXUPCOPY_CALL(flush_sig_insns, local_flush_sig_insns);
- BTFIXUPCOPY_CALL(flush_page_for_dma, local_flush_page_for_dma);
- btfixup();
- #endif
- }
- static void __init init_viking(void)
- {
- unsigned long mreg = srmmu_get_mmureg();
- /* Ahhh, the viking. SRMMU VLSI abortion number two... */
- if(mreg & VIKING_MMODE) {
- srmmu_name = "TI Viking";
- viking_mxcc_present = 0;
- msi_set_sync();
- BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_NORM);
- /*
- * We need this to make sure old viking takes no hits
- * on it's cache for dma snoops to workaround the
- * "load from non-cacheable memory" interrupt bug.
- * This is only necessary because of the new way in
- * which we use the IOMMU.
- */
- BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page, BTFIXUPCALL_NORM);
- flush_page_for_dma_global = 0;
- } else {
- srmmu_name = "TI Viking/MXCC";
- viking_mxcc_present = 1;
- srmmu_cache_pagetables = 1;
- /* MXCC vikings lack the DMA snooping bug. */
- BTFIXUPSET_CALL(flush_page_for_dma, viking_flush_page_for_dma, BTFIXUPCALL_NOP);
- }
- BTFIXUPSET_CALL(flush_cache_all, viking_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, viking_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, viking_flush_cache_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, viking_flush_cache_range, BTFIXUPCALL_NORM);
- #ifdef CONFIG_SMP
- if (sparc_cpu_model == sun4d) {
- BTFIXUPSET_CALL(flush_tlb_all, sun4dsmp_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, sun4dsmp_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, sun4dsmp_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, sun4dsmp_flush_tlb_range, BTFIXUPCALL_NORM);
- } else
- #endif
- {
- BTFIXUPSET_CALL(flush_tlb_all, viking_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, viking_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, viking_flush_tlb_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, viking_flush_tlb_range, BTFIXUPCALL_NORM);
- }
- BTFIXUPSET_CALL(__flush_page_to_ram, viking_flush_page_to_ram, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(flush_sig_insns, viking_flush_sig_insns, BTFIXUPCALL_NOP);
- poke_srmmu = poke_viking;
- }
- /* Probe for the srmmu chip version. */
- static void __init get_srmmu_type(void)
- {
- unsigned long mreg, psr;
- unsigned long mod_typ, mod_rev, psr_typ, psr_vers;
- srmmu_modtype = SRMMU_INVAL_MOD;
- hwbug_bitmask = 0;
- mreg = srmmu_get_mmureg(); psr = get_psr();
- mod_typ = (mreg & 0xf0000000) >> 28;
- mod_rev = (mreg & 0x0f000000) >> 24;
- psr_typ = (psr >> 28) & 0xf;
- psr_vers = (psr >> 24) & 0xf;
- /* First, check for HyperSparc or Cypress. */
- if(mod_typ == 1) {
- switch(mod_rev) {
- case 7:
- /* UP or MP Hypersparc */
- init_hypersparc();
- break;
- case 0:
- case 2:
- /* Uniprocessor Cypress */
- init_cypress_604();
- break;
- case 10:
- case 11:
- case 12:
- /* _REALLY OLD_ Cypress MP chips... */
- case 13:
- case 14:
- case 15:
- /* MP Cypress mmu/cache-controller */
- init_cypress_605(mod_rev);
- break;
- default:
- /* Some other Cypress revision, assume a 605. */
- init_cypress_605(mod_rev);
- break;
- };
- return;
- }
-
- /*
- * Now Fujitsu TurboSparc. It might happen that it is
- * in Swift emulation mode, so we will check later...
- */
- if (psr_typ == 0 && psr_vers == 5) {
- init_turbosparc();
- return;
- }
- /* Next check for Fujitsu Swift. */
- if(psr_typ == 0 && psr_vers == 4) {
- int cpunode;
- char node_str[128];
- /* Look if it is not a TurboSparc emulating Swift... */
- cpunode = prom_getchild(prom_root_node);
- while((cpunode = prom_getsibling(cpunode)) != 0) {
- prom_getstring(cpunode, "device_type", node_str, sizeof(node_str));
- if(!strcmp(node_str, "cpu")) {
- if (!prom_getintdefault(cpunode, "psr-implementation", 1) &&
- prom_getintdefault(cpunode, "psr-version", 1) == 5) {
- init_turbosparc();
- return;
- }
- break;
- }
- }
-
- init_swift();
- return;
- }
- /* Now the Viking family of srmmu. */
- if(psr_typ == 4 &&
- ((psr_vers == 0) ||
- ((psr_vers == 1) && (mod_typ == 0) && (mod_rev == 0)))) {
- init_viking();
- return;
- }
- /* Finally the Tsunami. */
- if(psr_typ == 4 && psr_vers == 1 && (mod_typ || mod_rev)) {
- init_tsunami();
- return;
- }
- /* Oh well */
- srmmu_is_bad();
- }
- /* dont laugh, static pagetables */
- static int srmmu_check_pgt_cache(int low, int high)
- {
- return 0;
- }
- extern unsigned long spwin_mmu_patchme, fwin_mmu_patchme,
- tsetup_mmu_patchme, rtrap_mmu_patchme;
- extern unsigned long spwin_srmmu_stackchk, srmmu_fwin_stackchk,
- tsetup_srmmu_stackchk, srmmu_rett_stackchk;
- extern unsigned long srmmu_fault;
- #define PATCH_BRANCH(insn, dest) do {
- iaddr = &(insn);
- daddr = &(dest);
- *iaddr = SPARC_BRANCH((unsigned long) daddr, (unsigned long) iaddr);
- } while(0);
- static void __init patch_window_trap_handlers(void)
- {
- unsigned long *iaddr, *daddr;
-
- PATCH_BRANCH(spwin_mmu_patchme, spwin_srmmu_stackchk);
- PATCH_BRANCH(fwin_mmu_patchme, srmmu_fwin_stackchk);
- PATCH_BRANCH(tsetup_mmu_patchme, tsetup_srmmu_stackchk);
- PATCH_BRANCH(rtrap_mmu_patchme, srmmu_rett_stackchk);
- PATCH_BRANCH(sparc_ttable[SP_TRAP_TFLT].inst_three, srmmu_fault);
- PATCH_BRANCH(sparc_ttable[SP_TRAP_DFLT].inst_three, srmmu_fault);
- PATCH_BRANCH(sparc_ttable[SP_TRAP_DACC].inst_three, srmmu_fault);
- }
- #ifdef CONFIG_SMP
- /* Local cross-calls. */
- static void smp_flush_page_for_dma(unsigned long page)
- {
- xc1((smpfunc_t) BTFIXUP_CALL(local_flush_page_for_dma), page);
- local_flush_page_for_dma(page);
- }
- #endif
- /* Load up routines and constants for sun4m and sun4d mmu */
- void __init ld_mmu_srmmu(void)
- {
- extern void ld_mmu_iommu(void);
- extern void ld_mmu_iounit(void);
- extern void ___xchg32_sun4md(void);
-
- /* First the constants */
- BTFIXUPSET_SIMM13(pmd_shift, SRMMU_PMD_SHIFT);
- BTFIXUPSET_SETHI(pmd_size, SRMMU_PMD_SIZE);
- BTFIXUPSET_SETHI(pmd_mask, SRMMU_PMD_MASK);
- BTFIXUPSET_SIMM13(pgdir_shift, SRMMU_PGDIR_SHIFT);
- BTFIXUPSET_SETHI(pgdir_size, SRMMU_PGDIR_SIZE);
- BTFIXUPSET_SETHI(pgdir_mask, SRMMU_PGDIR_MASK);
- BTFIXUPSET_SIMM13(ptrs_per_pte, SRMMU_PTRS_PER_PTE);
- BTFIXUPSET_SIMM13(ptrs_per_pmd, SRMMU_PTRS_PER_PMD);
- BTFIXUPSET_SIMM13(ptrs_per_pgd, SRMMU_PTRS_PER_PGD);
- BTFIXUPSET_INT(page_none, pgprot_val(SRMMU_PAGE_NONE));
- BTFIXUPSET_INT(page_shared, pgprot_val(SRMMU_PAGE_SHARED));
- BTFIXUPSET_INT(page_copy, pgprot_val(SRMMU_PAGE_COPY));
- BTFIXUPSET_INT(page_readonly, pgprot_val(SRMMU_PAGE_RDONLY));
- BTFIXUPSET_INT(page_kernel, pgprot_val(SRMMU_PAGE_KERNEL));
- page_kernel = pgprot_val(SRMMU_PAGE_KERNEL);
- pg_iobits = SRMMU_VALID | SRMMU_WRITE | SRMMU_REF;
-
- /* Functions */
- #ifndef CONFIG_SMP
- BTFIXUPSET_CALL(___xchg32, ___xchg32_sun4md, BTFIXUPCALL_SWAPG1G2);
- #endif
- BTFIXUPSET_CALL(do_check_pgt_cache, srmmu_check_pgt_cache, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(set_pte, srmmu_set_pte, BTFIXUPCALL_SWAPO0O1);
- BTFIXUPSET_CALL(switch_mm, srmmu_switch_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pte_page, srmmu_pte_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_page, srmmu_pmd_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_page, srmmu_pgd_page, BTFIXUPCALL_NORM);
- BTFIXUPSET_SETHI(none_mask, 0xF0000000); /* XXX P3: is it used? */
- BTFIXUPSET_CALL(pte_present, srmmu_pte_present, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pte_clear, srmmu_pte_clear, BTFIXUPCALL_SWAPO0G0);
- BTFIXUPSET_CALL(pmd_bad, srmmu_pmd_bad, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_present, srmmu_pmd_present, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_clear, srmmu_pmd_clear, BTFIXUPCALL_SWAPO0G0);
- BTFIXUPSET_CALL(pgd_none, srmmu_pgd_none, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_bad, srmmu_pgd_bad, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_present, srmmu_pgd_present, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_clear, srmmu_pgd_clear, BTFIXUPCALL_SWAPO0G0);
- BTFIXUPSET_CALL(mk_pte, srmmu_mk_pte, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mk_pte_phys, srmmu_mk_pte_phys, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(mk_pte_io, srmmu_mk_pte_io, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pgd_set, srmmu_pgd_set, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_set, srmmu_pmd_set, BTFIXUPCALL_NORM);
-
- BTFIXUPSET_INT(pte_modify_mask, SRMMU_CHG_MASK);
- BTFIXUPSET_CALL(pmd_offset, srmmu_pmd_offset, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pte_offset, srmmu_pte_offset, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(free_pte_fast, srmmu_free_pte_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pte_alloc_one_fast, srmmu_pte_alloc_one_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pte_alloc_one, srmmu_pte_alloc_one, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(free_pmd_fast, srmmu_free_pmd_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(pmd_alloc_one_fast, srmmu_pmd_alloc_one_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(free_pgd_fast, srmmu_free_pgd_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(get_pgd_fast, srmmu_get_pgd_fast, BTFIXUPCALL_NORM);
- BTFIXUPSET_HALF(pte_writei, SRMMU_WRITE);
- BTFIXUPSET_HALF(pte_dirtyi, SRMMU_DIRTY);
- BTFIXUPSET_HALF(pte_youngi, SRMMU_REF);
- BTFIXUPSET_HALF(pte_wrprotecti, SRMMU_WRITE);
- BTFIXUPSET_HALF(pte_mkcleani, SRMMU_DIRTY);
- BTFIXUPSET_HALF(pte_mkoldi, SRMMU_REF);
- BTFIXUPSET_CALL(pte_mkwrite, srmmu_pte_mkwrite, BTFIXUPCALL_ORINT(SRMMU_WRITE));
- BTFIXUPSET_CALL(pte_mkdirty, srmmu_pte_mkdirty, BTFIXUPCALL_ORINT(SRMMU_DIRTY));
- BTFIXUPSET_CALL(pte_mkyoung, srmmu_pte_mkyoung, BTFIXUPCALL_ORINT(SRMMU_REF));
- BTFIXUPSET_CALL(update_mmu_cache, srmmu_update_mmu_cache, BTFIXUPCALL_NOP);
- BTFIXUPSET_CALL(destroy_context, srmmu_destroy_context, BTFIXUPCALL_NORM);
-
- BTFIXUPSET_CALL(mmu_info, srmmu_mmu_info, BTFIXUPCALL_NORM);
- /* Task struct and kernel stack allocating/freeing. */
- BTFIXUPSET_CALL(alloc_task_struct, srmmu_alloc_task_struct, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(free_task_struct, srmmu_free_task_struct, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(get_task_struct, srmmu_get_task_struct, BTFIXUPCALL_NORM);
- get_srmmu_type();
- patch_window_trap_handlers();
- #ifdef CONFIG_SMP
- /* El switcheroo... */
- BTFIXUPCOPY_CALL(local_flush_cache_all, flush_cache_all);
- BTFIXUPCOPY_CALL(local_flush_cache_mm, flush_cache_mm);
- BTFIXUPCOPY_CALL(local_flush_cache_range, flush_cache_range);
- BTFIXUPCOPY_CALL(local_flush_cache_page, flush_cache_page);
- BTFIXUPCOPY_CALL(local_flush_tlb_all, flush_tlb_all);
- BTFIXUPCOPY_CALL(local_flush_tlb_mm, flush_tlb_mm);
- BTFIXUPCOPY_CALL(local_flush_tlb_range, flush_tlb_range);
- BTFIXUPCOPY_CALL(local_flush_tlb_page, flush_tlb_page);
- BTFIXUPCOPY_CALL(local_flush_page_to_ram, __flush_page_to_ram);
- BTFIXUPCOPY_CALL(local_flush_sig_insns, flush_sig_insns);
- BTFIXUPCOPY_CALL(local_flush_page_for_dma, flush_page_for_dma);
- BTFIXUPSET_CALL(flush_cache_all, smp_flush_cache_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
- if (sparc_cpu_model != sun4d) {
- BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_tlb_page, smp_flush_tlb_page, BTFIXUPCALL_NORM);
- }
- BTFIXUPSET_CALL(__flush_page_to_ram, smp_flush_page_to_ram, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_sig_insns, smp_flush_sig_insns, BTFIXUPCALL_NORM);
- BTFIXUPSET_CALL(flush_page_for_dma, smp_flush_page_for_dma, BTFIXUPCALL_NORM);
- #endif
- if (sparc_cpu_model == sun4d)
- ld_mmu_iounit();
- else
- ld_mmu_iommu();
- #ifdef CONFIG_SMP
- if (sparc_cpu_model == sun4d)
- sun4d_init_smp();
- else
- sun4m_init_smp();
- #endif
- }