diff options
| -rw-r--r-- | arch/sparc64/Kconfig.debug | 8 | ||||
| -rw-r--r-- | arch/sparc64/kernel/head.S | 6 | ||||
| -rw-r--r-- | arch/sparc64/kernel/ktlb.S | 33 | ||||
| -rw-r--r-- | arch/sparc64/kernel/vmlinux.lds.S | 3 | ||||
| -rw-r--r-- | arch/sparc64/mm/init.c | 109 | ||||
| -rw-r--r-- | include/asm-sparc64/cacheflush.h | 5 | ||||
| -rw-r--r-- | include/asm-sparc64/pgtable.h | 7 |
7 files changed, 156 insertions, 15 deletions
diff --git a/arch/sparc64/Kconfig.debug b/arch/sparc64/Kconfig.debug index af0e9411b83e..fa06ea04837b 100644 --- a/arch/sparc64/Kconfig.debug +++ b/arch/sparc64/Kconfig.debug @@ -33,6 +33,14 @@ config DEBUG_BOOTMEM depends on DEBUG_KERNEL bool "Debug BOOTMEM initialization" +config DEBUG_PAGEALLOC + bool "Page alloc debugging" + depends on DEBUG_KERNEL && !SOFTWARE_SUSPEND + help + Unmap pages from the kernel linear mapping after free_pages(). + This results in a large slowdown, but helps to find certain types + of memory corruptions. + config MCOUNT bool depends on STACK_DEBUG diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S index 56af714f5f1b..ecc748fb9ad7 100644 --- a/arch/sparc64/kernel/head.S +++ b/arch/sparc64/kernel/head.S @@ -525,12 +525,6 @@ bootup_user_stack_end: #include "ttable.S" #include "systbls.S" - - .align 1024 - .globl swapper_pg_dir -swapper_pg_dir: - .word 0 - #include "ktlb.S" #include "etrap.S" #include "rtrap.S" diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S index a591bc0ebc7b..7796b37f478c 100644 --- a/arch/sparc64/kernel/ktlb.S +++ b/arch/sparc64/kernel/ktlb.S @@ -132,9 +132,40 @@ kvmap_do_obp: */ .align 32 kvmap: - brlz,pt %g4, kvmap_load + brgez,pn %g4, kvmap_nonlinear + nop + +#ifdef CONFIG_DEBUG_PAGEALLOC + .globl kvmap_linear_patch +kvmap_linear_patch: +#endif + ba,pt %xcc, kvmap_load xor %g2, %g4, %g5 +#ifdef CONFIG_DEBUG_PAGEALLOC + sethi %hi(swapper_pg_dir), %g5 + or %g5, %lo(swapper_pg_dir), %g5 + sllx %g4, 64 - (PGDIR_SHIFT + PGDIR_BITS), %g6 + srlx %g6, 64 - PAGE_SHIFT, %g6 + andn %g6, 0x3, %g6 + lduw [%g5 + %g6], %g5 + brz,pn %g5, longpath + sllx %g4, 64 - (PMD_SHIFT + PMD_BITS), %g6 + srlx %g6, 64 - PAGE_SHIFT, %g6 + sllx %g5, 11, %g5 + andn %g6, 0x3, %g6 + lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 + brz,pn %g5, longpath + sllx %g4, 64 - PMD_SHIFT, %g6 + srlx %g6, 64 - PAGE_SHIFT, %g6 + sllx %g5, 11, %g5 + andn %g6, 0x7, %g6 + ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 + brz,pn %g5, longpath + nop + ba,a,pt %xcc, kvmap_load +#endif + kvmap_nonlinear: sethi %hi(MODULES_VADDR), %g5 cmp %g4, %g5 diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S index f47d0be39378..2af0cf0a8640 100644 --- a/arch/sparc64/kernel/vmlinux.lds.S +++ b/arch/sparc64/kernel/vmlinux.lds.S @@ -9,8 +9,7 @@ ENTRY(_start) jiffies = jiffies_64; SECTIONS { - swapper_pmd_dir = 0x0000000000402000; - empty_pg_dir = 0x0000000000403000; + swapper_low_pmd_dir = 0x0000000000402000; . = 0x4000; .text 0x0000000000404000 : { diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index cf747372f0c9..8d72f8a1268e 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1332,15 +1332,114 @@ unsigned long __init bootmem_init(unsigned long *pages_avail) return end_pfn; } +#ifdef CONFIG_DEBUG_PAGEALLOC +static unsigned long kernel_map_range(unsigned long pstart, unsigned long pend, pgprot_t prot) +{ + unsigned long vstart = PAGE_OFFSET + pstart; + unsigned long vend = PAGE_OFFSET + pend; + unsigned long alloc_bytes = 0UL; + + if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { + prom_printf("kernel_map: Unaligned sp_banks[%lx:%lx]\n", + vstart, vend); + prom_halt(); + } + + while (vstart < vend) { + unsigned long this_end, paddr = __pa(vstart); + pgd_t *pgd = pgd_offset_k(vstart); + pud_t *pud; + pmd_t *pmd; + pte_t *pte; + + pud = pud_offset(pgd, vstart); + if (pud_none(*pud)) { + pmd_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + alloc_bytes += PAGE_SIZE; + pud_populate(&init_mm, pud, new); + } + + pmd = pmd_offset(pud, vstart); + if (!pmd_present(*pmd)) { + pte_t *new; + + new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + alloc_bytes += PAGE_SIZE; + pmd_populate_kernel(&init_mm, pmd, new); + } + + pte = pte_offset_kernel(pmd, vstart); + this_end = (vstart + PMD_SIZE) & PMD_MASK; + if (this_end > vend) + this_end = vend; + + while (vstart < this_end) { + pte_val(*pte) = (paddr | pgprot_val(prot)); + + vstart += PAGE_SIZE; + paddr += PAGE_SIZE; + pte++; + } + } + + return alloc_bytes; +} + +extern struct linux_mlist_p1275 *prom_ptot_ptr; +extern unsigned int kvmap_linear_patch[1]; + +static void __init kernel_physical_mapping_init(void) +{ + struct linux_mlist_p1275 *p = prom_ptot_ptr; + unsigned long mem_alloced = 0UL; + + while (p) { + unsigned long phys_start, phys_end; + + phys_start = p->start_adr; + phys_end = phys_start + p->num_bytes; + mem_alloced += kernel_map_range(phys_start, phys_end, + PAGE_KERNEL); + + p = p->theres_more; + } + + printk("Allocated %ld bytes for kernel page tables.\n", + mem_alloced); + + kvmap_linear_patch[0] = 0x01000000; /* nop */ + flushi(&kvmap_linear_patch[0]); + + __flush_tlb_all(); +} + +void kernel_map_pages(struct page *page, int numpages, int enable) +{ + unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT; + unsigned long phys_end = phys_start + (numpages * PAGE_SIZE); + + kernel_map_range(phys_start, phys_end, + (enable ? PAGE_KERNEL : __pgprot(0))); + + /* we should perform an IPI and flush all tlbs, + * but that can deadlock->flush only current cpu. + */ + __flush_tlb_kernel_range(PAGE_OFFSET + phys_start, + PAGE_OFFSET + phys_end); +} +#endif + /* paging_init() sets up the page tables */ extern void cheetah_ecache_flush_init(void); static unsigned long last_valid_pfn; +pgd_t swapper_pg_dir[2048]; void __init paging_init(void) { - extern pmd_t swapper_pmd_dir[1024]; unsigned long end_pfn, pages_avail, shift; unsigned long real_end; @@ -1361,11 +1460,11 @@ void __init paging_init(void) */ init_mm.pgd += ((shift) / (sizeof(pgd_t))); - memset(swapper_pmd_dir, 0, sizeof(swapper_pmd_dir)); + memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir)); /* Now can init the kernel/bad page tables. */ pud_set(pud_offset(&swapper_pg_dir[0], 0), - swapper_pmd_dir + (shift / sizeof(pgd_t))); + swapper_low_pmd_dir + (shift / sizeof(pgd_t))); swapper_pgd_zero = pgd_val(swapper_pg_dir[0]); @@ -1390,6 +1489,10 @@ void __init paging_init(void) pages_avail = 0; last_valid_pfn = end_pfn = bootmem_init(&pages_avail); +#ifdef CONFIG_DEBUG_PAGEALLOC + kernel_physical_mapping_init(); +#endif + { unsigned long zones_size[MAX_NR_ZONES]; unsigned long zholes_size[MAX_NR_ZONES]; diff --git a/include/asm-sparc64/cacheflush.h b/include/asm-sparc64/cacheflush.h index ededd2659eab..b3f61659ba81 100644 --- a/include/asm-sparc64/cacheflush.h +++ b/include/asm-sparc64/cacheflush.h @@ -66,6 +66,11 @@ extern void flush_ptrace_access(struct vm_area_struct *, struct page *, #define flush_cache_vmap(start, end) do { } while (0) #define flush_cache_vunmap(start, end) do { } while (0) +#ifdef CONFIG_DEBUG_PAGEALLOC +/* internal debugging function */ +void kernel_map_pages(struct page *page, int numpages, int enable); +#endif + #endif /* !__ASSEMBLY__ */ #endif /* _SPARC64_CACHEFLUSH_H */ diff --git a/include/asm-sparc64/pgtable.h b/include/asm-sparc64/pgtable.h index a297f6144f0f..43cbb089cde2 100644 --- a/include/asm-sparc64/pgtable.h +++ b/include/asm-sparc64/pgtable.h @@ -60,13 +60,13 @@ * table can map */ #define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3)) -#define PMD_SIZE (1UL << PMD_SHIFT) +#define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) #define PMD_MASK (~(PMD_SIZE-1)) #define PMD_BITS (PAGE_SHIFT - 2) /* PGDIR_SHIFT determines what a third-level page table entry can map */ #define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + PMD_BITS) -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) +#define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PGDIR_BITS (PAGE_SHIFT - 2) @@ -336,7 +336,8 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *p #define pte_clear(mm,addr,ptep) \ set_pte_at((mm), (addr), (ptep), __pte(0UL)) -extern pgd_t swapper_pg_dir[1]; +extern pgd_t swapper_pg_dir[2048]; +extern pmd_t swapper_low_pmd_dir[2048]; /* These do nothing with the way I have things setup. */ #define mmu_lockarea(vaddr, len) (vaddr) |