diff options
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/Kconfig | 39 | ||||
| -rw-r--r-- | arch/sh/mm/Makefile | 7 | ||||
| -rw-r--r-- | arch/sh/mm/alignment.c | 159 | ||||
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 13 | ||||
| -rw-r--r-- | arch/sh/mm/cache.c | 13 | ||||
| -rw-r--r-- | arch/sh/mm/fault_32.c | 3 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 79 | ||||
| -rw-r--r-- | arch/sh/mm/ioremap_32.c | 28 | ||||
| -rw-r--r-- | arch/sh/mm/ioremap_64.c | 287 | ||||
| -rw-r--r-- | arch/sh/mm/ioremap_fixed.c | 144 | ||||
| -rw-r--r-- | arch/sh/mm/nommu.c | 4 | ||||
| -rw-r--r-- | arch/sh/mm/pgtable.c | 56 | ||||
| -rw-r--r-- | arch/sh/mm/pmb.c | 134 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-pteaex.c | 66 | ||||
| -rw-r--r-- | arch/sh/mm/tlb-sh4.c | 66 | ||||
| -rw-r--r-- | arch/sh/mm/tlbflush_64.c | 2 |
16 files changed, 704 insertions, 396 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 986a71b88ca3..b89075256b70 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -80,30 +80,18 @@ config 32BIT bool default y if CPU_SH5 -config PMB_ENABLE - bool "Support 32-bit physical addressing through PMB" - depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP - help - If you say Y here, physical addressing will be extended to - 32-bits through the SH-4A PMB. If this is not set, legacy - 29-bit physical addressing will be used. - -choice - prompt "PMB handling type" - depends on PMB_ENABLE - default PMB_FIXED - config PMB - bool "PMB" + bool "Support 32-bit physical addressing through PMB" depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP + select 32BIT help If you say Y here, physical addressing will be extended to 32-bits through the SH-4A PMB. If this is not set, legacy 29-bit physical addressing will be used. -config PMB_FIXED - bool "fixed PMB" - depends on MMU && EXPERIMENTAL && CPU_SH4A && !CPU_SH4AL_DSP +config PMB_LEGACY + bool "Support legacy boot mappings for PMB" + depends on PMB select 32BIT help If this option is enabled, fixed PMB mappings are inherited @@ -111,16 +99,9 @@ config PMB_FIXED management. This is the closest to legacy 29-bit physical mode, and allows systems to support up to 512MiB of system memory. -endchoice - config X2TLB - bool "Enable extended TLB mode" - depends on (CPU_SHX2 || CPU_SHX3) && MMU && EXPERIMENTAL - help - Selecting this option will enable the extended mode of the SH-X2 - TLB. For legacy SH-X behaviour and interoperability, say N. For - all of the fun new features and a willingless to submit bug reports, - say Y. + def_bool y + depends on (CPU_SHX2 || CPU_SHX3) && MMU config VSYSCALL bool "Support vsyscall page" @@ -188,14 +169,16 @@ config ARCH_MEMORY_PROBE def_bool y depends on MEMORY_HOTPLUG +config IOREMAP_FIXED + def_bool y + depends on X2TLB || SUPERH64 + choice prompt "Kernel page size" - default PAGE_SIZE_8KB if X2TLB default PAGE_SIZE_4KB config PAGE_SIZE_4KB bool "4kB" - depends on !MMU || !X2TLB help This is the default page size used by all SuperH CPUs. diff --git a/arch/sh/mm/Makefile b/arch/sh/mm/Makefile index 8a70535fa7ce..89ba56c20ade 100644 --- a/arch/sh/mm/Makefile +++ b/arch/sh/mm/Makefile @@ -2,7 +2,7 @@ # Makefile for the Linux SuperH-specific parts of the memory manager. # -obj-y := cache.o init.o consistent.o mmap.o +obj-y := alignment.o cache.o init.o consistent.o mmap.o cacheops-$(CONFIG_CPU_SH2) := cache-sh2.o cacheops-$(CONFIG_CPU_SH2A) := cache-sh2a.o @@ -15,7 +15,7 @@ obj-y += $(cacheops-y) mmu-y := nommu.o extable_32.o mmu-$(CONFIG_MMU) := extable_$(BITS).o fault_$(BITS).o \ - ioremap_$(BITS).o kmap.o tlbflush_$(BITS).o + ioremap_$(BITS).o kmap.o pgtable.o tlbflush_$(BITS).o obj-y += $(mmu-y) obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o @@ -33,8 +33,9 @@ obj-y += $(tlb-y) endif obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o -obj-$(CONFIG_PMB_ENABLE) += pmb.o +obj-$(CONFIG_PMB) += pmb.o obj-$(CONFIG_NUMA) += numa.o +obj-$(CONFIG_IOREMAP_FIXED) += ioremap_fixed.o # Special flags for fault_64.o. This puts restrictions on the number of # caller-save registers that the compiler can target when building this file. diff --git a/arch/sh/mm/alignment.c b/arch/sh/mm/alignment.c new file mode 100644 index 000000000000..e615151eac3b --- /dev/null +++ b/arch/sh/mm/alignment.c @@ -0,0 +1,159 @@ +/* + * Alignment access counters and corresponding user-space interfaces. + * + * Copyright (C) 2009 ST Microelectronics + * Copyright (C) 2009 - 2010 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/seq_file.h> +#include <linux/proc_fs.h> +#include <linux/uaccess.h> +#include <asm/alignment.h> + +static unsigned long se_user; +static unsigned long se_sys; +static unsigned long se_half; +static unsigned long se_word; +static unsigned long se_dword; +static unsigned long se_multi; +/* bitfield: 1: warn 2: fixup 4: signal -> combinations 2|4 && 1|2|4 are not + valid! */ +static int se_usermode = UM_WARN | UM_FIXUP; +/* 0: no warning 1: print a warning message, disabled by default */ +static int se_kernmode_warn; + +void inc_unaligned_byte_access(void) +{ + se_half++; +} + +void inc_unaligned_word_access(void) +{ + se_word++; +} + +void inc_unaligned_dword_access(void) +{ + se_dword++; +} + +void inc_unaligned_multi_access(void) +{ + se_multi++; +} + +void inc_unaligned_user_access(void) +{ + se_user++; +} + +void inc_unaligned_kernel_access(void) +{ + se_sys++; +} + +unsigned int unaligned_user_action(void) +{ + return se_usermode; +} + +void unaligned_fixups_notify(struct task_struct *tsk, insn_size_t insn, + struct pt_regs *regs) +{ + if (user_mode(regs) && (se_usermode & UM_WARN) && printk_ratelimit()) + pr_notice("Fixing up unaligned userspace access " + "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n", + tsk->comm, task_pid_nr(tsk), + (void *)regs->pc, insn); + else if (se_kernmode_warn && printk_ratelimit()) + pr_notice("Fixing up unaligned kernel access " + "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n", + tsk->comm, task_pid_nr(tsk), + (void *)regs->pc, insn); +} + +static const char *se_usermode_action[] = { + "ignored", + "warn", + "fixup", + "fixup+warn", + "signal", + "signal+warn" +}; + +static int alignment_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "User:\t\t%lu\n", se_user); + seq_printf(m, "System:\t\t%lu\n", se_sys); + seq_printf(m, "Half:\t\t%lu\n", se_half); + seq_printf(m, "Word:\t\t%lu\n", se_word); + seq_printf(m, "DWord:\t\t%lu\n", se_dword); + seq_printf(m, "Multi:\t\t%lu\n", se_multi); + seq_printf(m, "User faults:\t%i (%s)\n", se_usermode, + se_usermode_action[se_usermode]); + seq_printf(m, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn, + se_kernmode_warn ? "+warn" : ""); + return 0; +} + +static int alignment_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, alignment_proc_show, NULL); +} + +static ssize_t alignment_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *pos) +{ + int *data = PDE(file->f_path.dentry->d_inode)->data; + char mode; + + if (count > 0) { + if (get_user(mode, buffer)) + return -EFAULT; + if (mode >= '0' && mode <= '5') + *data = mode - '0'; + } + return count; +} + +static const struct file_operations alignment_proc_fops = { + .owner = THIS_MODULE, + .open = alignment_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = alignment_proc_write, +}; + +/* + * This needs to be done after sysctl_init, otherwise sys/ will be + * overwritten. Actually, this shouldn't be in sys/ at all since + * it isn't a sysctl, and it doesn't contain sysctl information. + * We now locate it in /proc/cpu/alignment instead. + */ +static int __init alignment_init(void) +{ + struct proc_dir_entry *dir, *res; + + dir = proc_mkdir("cpu", NULL); + if (!dir) + return -ENOMEM; + + res = proc_create_data("alignment", S_IWUSR | S_IRUGO, dir, + &alignment_proc_fops, &se_usermode); + if (!res) + return -ENOMEM; + + res = proc_create_data("kernel_alignment", S_IWUSR | S_IRUGO, dir, + &alignment_proc_fops, &se_kernmode_warn); + if (!res) + return -ENOMEM; + + return 0; +} +fs_initcall(alignment_init); diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index 560ddb6bc8a7..a2301daeefa3 100644 --- a/arch/sh/mm/cache-sh4.c +++ b/arch/sh/mm/cache-sh4.c @@ -109,6 +109,7 @@ static inline void flush_cache_one(unsigned long start, unsigned long phys) static void sh4_flush_dcache_page(void *arg) { struct page *page = arg; + unsigned long addr = (unsigned long)page_address(page); #ifndef CONFIG_SMP struct address_space *mapping = page_mapping(page); @@ -116,16 +117,8 @@ static void sh4_flush_dcache_page(void *arg) set_bit(PG_dcache_dirty, &page->flags); else #endif - { - unsigned long phys = page_to_phys(page); - unsigned long addr = CACHE_OC_ADDRESS_ARRAY; - int i, n; - - /* Loop all the D-cache */ - n = boot_cpu_data.dcache.n_aliases; - for (i = 0; i < n; i++, addr += PAGE_SIZE) - flush_cache_one(addr, phys); - } + flush_cache_one(CACHE_OC_ADDRESS_ARRAY | + (addr & shm_align_mask), page_to_phys(page)); wmb(); } diff --git a/arch/sh/mm/cache.c b/arch/sh/mm/cache.c index b8607fa7ae12..0f4095d7ac8b 100644 --- a/arch/sh/mm/cache.c +++ b/arch/sh/mm/cache.c @@ -2,7 +2,7 @@ * arch/sh/mm/cache.c * * Copyright (C) 1999, 2000, 2002 Niibe Yutaka - * Copyright (C) 2002 - 2009 Paul Mundt + * Copyright (C) 2002 - 2010 Paul Mundt * * Released under the terms of the GNU GPL v2.0. */ @@ -41,8 +41,17 @@ static inline void cacheop_on_each_cpu(void (*func) (void *info), void *info, int wait) { preempt_disable(); - smp_call_function(func, info, wait); + + /* + * It's possible that this gets called early on when IRQs are + * still disabled due to ioremapping by the boot CPU, so don't + * even attempt IPIs unless there are other CPUs online. + */ + if (num_online_cpus() > 1) + smp_call_function(func, info, wait); + func(info); + preempt_enable(); } diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c index 47530104e0ad..28e22839c665 100644 --- a/arch/sh/mm/fault_32.c +++ b/arch/sh/mm/fault_32.c @@ -53,6 +53,9 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address) if (!pud_present(*pud_k)) return NULL; + if (!pud_present(*pud)) + set_pud(pud, *pud_k); + pmd = pmd_offset(pud, address); pmd_k = pmd_offset(pud_k, address); if (!pmd_present(*pmd_k)) diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index 432acd07e76a..30a9b530d456 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -39,7 +39,7 @@ unsigned long cached_to_uncached = P2SEG - P1SEG; #endif #ifdef CONFIG_MMU -static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) +static pte_t *__get_pte_phys(unsigned long addr) { pgd_t *pgd; pud_t *pud; @@ -49,22 +49,30 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) pgd = pgd_offset_k(addr); if (pgd_none(*pgd)) { pgd_ERROR(*pgd); - return; + return NULL; } pud = pud_alloc(NULL, pgd, addr); if (unlikely(!pud)) { pud_ERROR(*pud); - return; + return NULL; } pmd = pmd_alloc(NULL, pud, addr); if (unlikely(!pmd)) { pmd_ERROR(*pmd); - return; + return NULL; } pte = pte_offset_kernel(pmd, addr); + return pte; +} + +static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) +{ + pte_t *pte; + + pte = __get_pte_phys(addr); if (!pte_none(*pte)) { pte_ERROR(*pte); return; @@ -72,6 +80,22 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot)); local_flush_tlb_one(get_asid(), addr); + + if (pgprot_val(prot) & _PAGE_WIRED) + tlb_wire_entry(NULL, addr, *pte); +} + +static void clear_pte_phys(unsigned long addr, pgprot_t prot) +{ + pte_t *pte; + + pte = __get_pte_phys(addr); + + if (pgprot_val(prot) & _PAGE_WIRED) + tlb_unwire_entry(); + + set_pte(pte, pfn_pte(0, __pgprot(0))); + local_flush_tlb_one(get_asid(), addr); } /* @@ -101,6 +125,18 @@ void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) set_pte_phys(address, phys, prot); } +void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot) +{ + unsigned long address = __fix_to_virt(idx); + + if (idx >= __end_of_fixed_addresses) { + BUG(); + return; + } + + clear_pte_phys(address, prot); +} + void __init page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base) { @@ -120,7 +156,13 @@ void __init page_table_range_init(unsigned long start, unsigned long end, for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) { pud = (pud_t *)pgd; for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) { +#ifdef __PAGETABLE_PMD_FOLDED pmd = (pmd_t *)pud; +#else + pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE); + pud_populate(&init_mm, pud, pmd); + pmd += k; +#endif for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { if (pmd_none(*pmd)) { pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE); @@ -277,35 +319,6 @@ void free_initrd_mem(unsigned long start, unsigned long end) } #endif -#if THREAD_SHIFT < PAGE_SHIFT -static struct kmem_cache *thread_info_cache; - -struct thread_info *alloc_thread_info(struct task_struct *tsk) -{ - struct thread_info *ti; - - ti = kmem_cache_alloc(thread_info_cache, GFP_KERNEL); - if (unlikely(ti == NULL)) - return NULL; -#ifdef CONFIG_DEBUG_STACK_USAGE - memset(ti, 0, THREAD_SIZE); -#endif - return ti; -} - -void free_thread_info(struct thread_info *ti) -{ - kmem_cache_free(thread_info_cache, ti); -} - -void thread_info_cache_init(void) -{ - thread_info_cache = kmem_cache_create("thread_info", THREAD_SIZE, - THREAD_SIZE, 0, NULL); - BUG_ON(thread_info_cache == NULL); -} -#endif /* THREAD_SHIFT < PAGE_SHIFT */ - #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size) { diff --git a/arch/sh/mm/ioremap_32.c b/arch/sh/mm/ioremap_32.c index 2141befb4f91..c80a8166fbb0 100644 --- a/arch/sh/mm/ioremap_32.c +++ b/arch/sh/mm/ioremap_32.c @@ -105,15 +105,35 @@ void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size, } EXPORT_SYMBOL(__ioremap_caller); +/* + * Simple checks for non-translatable mappings. + */ +static inline int iomapping_nontranslatable(unsigned long offset) +{ +#ifdef CONFIG_29BIT + /* + * In 29-bit mode this includes the fixed P1/P2 areas, as well as + * parts of P3. + */ + if (PXSEG(offset) < P3SEG || offset >= P3_ADDR_MAX) + return 1; +#endif + + if (is_pci_memory_fixed_range(offset, 0)) + return 1; + + return 0; +} + void __iounmap(void __iomem *addr) { unsigned long vaddr = (unsigned long __force)addr; - unsigned long seg = PXSEG(vaddr); struct vm_struct *p; - if (seg < P3SEG || vaddr >= P3_ADDR_MAX) - return; - if (is_pci_memory_fixed_range(vaddr, 0)) + /* + * Nothing to do if there is no translatable mapping. + */ + if (iomapping_nontranslatable(vaddr)) return; #ifdef CONFIG_PMB diff --git a/arch/sh/mm/ioremap_64.c b/arch/sh/mm/ioremap_64.c index ef434657d428..fb0aa457c71e 100644 --- a/arch/sh/mm/ioremap_64.c +++ b/arch/sh/mm/ioremap_64.c @@ -28,299 +28,20 @@ #include <asm/tlbflush.h> #include <asm/mmu.h> -static struct resource shmedia_iomap = { - .name = "shmedia_iomap", - .start = IOBASE_VADDR + PAGE_SIZE, - .end = IOBASE_END - 1, -}; - -static void shmedia_mapioaddr(unsigned long pa, unsigned long va, - unsigned long flags); -static void shmedia_unmapioaddr(unsigned long vaddr); -static void __iomem *shmedia_ioremap(struct resource *res, u32 pa, - int sz, unsigned long flags); - -/* - * We have the same problem as the SPARC, so lets have the same comment: - * Our mini-allocator... - * Boy this is gross! We need it because we must map I/O for - * timers and interrupt controller before the kmalloc is available. - */ - -#define XNMLN 15 -#define XNRES 10 - -struct xresource { - struct resource xres; /* Must be first */ - int xflag; /* 1 == used */ - char xname[XNMLN+1]; -}; - -static struct xresource xresv[XNRES]; - -static struct xresource *xres_alloc(void) -{ - struct xresource *xrp; - int n; - - xrp = xresv; - for (n = 0; n < XNRES; n++) { - if (xrp->xflag == 0) { - xrp->xflag = 1; - return xrp; - } - xrp++; - } - return NULL; -} - -static void xres_free(struct xresource *xrp) -{ - xrp->xflag = 0; -} - -static struct resource *shmedia_find_resource(struct resource *root, - unsigned long vaddr) -{ - struct resource *res; - - for (res = root->child; res; res = res->sibling) - if (res->start <= vaddr && res->end >= vaddr) - return res; - - return NULL; -} - -static void __iomem *shmedia_alloc_io(unsigned long phys, unsigned long size, - const char *name, unsigned long flags) -{ - struct xresource *xres; - struct resource *res; - char *tack; - int tlen; - - if (name == NULL) - name = "???"; - - xres = xres_alloc(); - if (xres != 0) { - tack = xres->xname; - res = &xres->xres; - } else { - printk_once(KERN_NOTICE "%s: done with statics, " - "switching to kmalloc\n", __func__); - tlen = strlen(name); - tack = kmalloc(sizeof(struct resource) + tlen + 1, GFP_KERNEL); - if (!tack) - return NULL; - memset(tack, 0, sizeof(struct resource)); - res = (struct resource *) tack; - tack += sizeof(struct resource); - } - - strncpy(tack, name, XNMLN); - tack[XNMLN] = 0; - res->name = tack; - - return shmedia_ioremap(res, phys, size, flags); -} - -static void __iomem *shmedia_ioremap(struct resource *res, u32 pa, int sz, - unsigned long flags) -{ - unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK); - unsigned long round_sz = (offset + sz + PAGE_SIZE-1) & PAGE_MASK; - unsigned long va; - unsigned int psz; - - if (allocate_resource(&shmedia_iomap, res, round_sz, - shmedia_iomap.start, shmedia_iomap.end, - PAGE_SIZE, NULL, NULL) != 0) { - panic("alloc_io_res(%s): cannot occupy\n", - (res->name != NULL) ? res->name : "???"); - } - - va = res->start; - pa &= PAGE_MASK; - - psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE; - - for (psz = res->end - res->start + 1; psz != 0; psz -= PAGE_SIZE) { - shmedia_mapioaddr(pa, va, flags); - va += PAGE_SIZE; - pa += PAGE_SIZE; - } - - return (void __iomem *)(unsigned long)(res->start + offset); -} - -static void shmedia_free_io(struct resource *res) -{ - unsigned long len = res->end - res->start + 1; - - BUG_ON((len & (PAGE_SIZE - 1)) != 0); - - while (len) { - len -= PAGE_SIZE; - shmedia_unmapioaddr(res->start + len); - } - - release_resource(res); -} - -static __init_refok void *sh64_get_page(void) -{ - void *page; - - if (slab_is_available()) - page = (void *)get_zeroed_page(GFP_KERNEL); - else - page = alloc_bootmem_pages(PAGE_SIZE); - - if (!page || ((unsigned long)page & ~PAGE_MASK)) - panic("sh64_get_page: Out of memory already?\n"); - - return page; -} - -static void shmedia_mapioaddr(unsigned long pa, unsigned long va, - unsigned long flags) +void __iomem *__ioremap_caller(unsigned long offset, unsigned long size, + unsigned long flags, void *caller) { - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep, pte; pgprot_t prot; - pr_debug("shmedia_mapiopage pa %08lx va %08lx\n", pa, va); - - if (!flags) - flags = 1; /* 1 = CB0-1 device */ - - pgdp = pgd_offset_k(va); - if (pgd_none(*pgdp) || !pgd_present(*pgdp)) { - pudp = (pud_t *)sh64_get_page(); - set_pgd(pgdp, __pgd((unsigned long)pudp | _KERNPG_TABLE)); - } - - pudp = pud_offset(pgdp, va); - if (pud_none(*pudp) || !pud_present(*pudp)) { - pmdp = (pmd_t *)sh64_get_page(); - set_pud(pudp, __pud((unsigned long)pmdp | _KERNPG_TABLE)); - } - - pmdp = pmd_offset(pudp, va); - if (pmd_none(*pmdp) || !pmd_present(*pmdp)) { - ptep = (pte_t *)sh64_get_page(); - set_pmd(pmdp, __pmd((unsigned long)ptep + _PAGE_TABLE)); - } - prot = __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_SHARED | flags); - pte = pfn_pte(pa >> PAGE_SHIFT, prot); - ptep = pte_offset_kernel(pmdp, va); - - if (!pte_none(*ptep) && - pte_val(*ptep) != pte_val(pte)) - pte_ERROR(*ptep); - - set_pte(ptep, pte); - - flush_tlb_kernel_range(va, PAGE_SIZE); -} - -static void shmedia_unmapioaddr(unsigned long vaddr) -{ - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep; - - pgdp = pgd_offset_k(vaddr); - if (pgd_none(*pgdp) || pgd_bad(*pgdp)) - return; - - pudp = pud_offset(pgdp, vaddr); - if (pud_none(*pudp) || pud_bad(*pudp)) - return; - - pmdp = pmd_offset(pudp, vaddr); - if (pmd_none(*pmdp) || pmd_bad(*pmdp)) - return; - - ptep = pte_offset_kernel(pmdp, vaddr); - - if (pte_none(*ptep) || !pte_present(*ptep)) - return; - - clear_page((void *)ptep); - pte_clear(&init_mm, vaddr, ptep); -} - -void __iomem *__ioremap_caller(unsigned long offset, unsigned long size, - unsigned long flags, void *caller) -{ - char name[14]; - - sprintf(name, "phys_%08x", (u32)offset); - return shmedia_alloc_io(offset, size, name, flags); + return ioremap_fixed(offset, size, prot); } EXPORT_SYMBOL(__ioremap_caller); void __iounmap(void __iomem *virtual) { - unsigned long vaddr = (unsigned long)virtual & PAGE_MASK; - struct resource *res; - unsigned int psz; - - res = shmedia_find_resource(&shmedia_iomap, vaddr); - if (!res) { - printk(KERN_ERR "%s: Failed to free 0x%08lx\n", - __func__, vaddr); - return; - } - - psz = (res->end - res->start + (PAGE_SIZE - 1)) / PAGE_SIZE; - - shmedia_free_io(res); - - if ((char *)res >= (char *)xresv && - (char *)res < (char *)&xresv[XNRES]) { - xres_free((struct xresource *)res); - } else { - kfree(res); - } + iounmap_fixed(virtual); } EXPORT_SYMBOL(__iounmap); - -static int -ioremap_proc_info(char *buf, char **start, off_t fpos, int length, int *eof, - void *data) -{ - char *p = buf, *e = buf + length; - struct resource *r; - const char *nm; - - for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) { - if (p + 32 >= e) /* Better than nothing */ - break; - nm = r->name; - if (nm == NULL) - nm = "???"; - - p += sprintf(p, "%08lx-%08lx: %s\n", - (unsigned long)r->start, - (unsigned long)r->end, nm); - } - - return p-buf; -} - -static int __init register_proc_onchip(void) -{ - create_proc_read_entry("io_map", 0, 0, ioremap_proc_info, - &shmedia_iomap); - return 0; -} -late_initcall(register_proc_onchip); diff --git a/arch/sh/mm/ioremap_fixed.c b/arch/sh/mm/ioremap_fixed.c new file mode 100644 index 000000000000..3a9d3d88fe8d --- /dev/null +++ b/arch/sh/mm/ioremap_fixed.c @@ -0,0 +1,144 @@ +/* + * Re-map IO memory to kernel address space so that we can access it. + * + * These functions should only be used when it is necessary to map a + * physical address space into the kernel address space before ioremap() + * can be used, e.g. early in boot before paging_init(). + * + * Copyright (C) 2009 Matt Fleming + */ + +#include <linux/vmalloc.h> +#include <linux/ioport.h> +#include <linux/module.h> +#include <linux/mm.h> +#include <linux/io.h> +#include <linux/bootmem.h> +#include <linux/proc_fs.h> +#include <linux/slab.h> +#include <asm/fixmap.h> +#include <asm/page.h> +#include <asm/pgalloc.h> +#include <asm/addrspace.h> +#include <asm/cacheflush.h> +#include <asm/tlbflush.h> +#include <asm/mmu.h> +#include <asm/mmu_context.h> + +struct ioremap_map { + void __iomem *addr; + unsigned long size; + unsigned long fixmap_addr; +}; + +static struct ioremap_map ioremap_maps[FIX_N_IOREMAPS]; + +void __init ioremap_fixed_init(void) +{ + struct ioremap_map *map; + int i; + + for (i = 0; i < FIX_N_IOREMAPS; i++) { + map = &ioremap_maps[i]; + map->fixmap_addr = __fix_to_virt(FIX_IOREMAP_BEGIN + i); + } +} + +void __init __iomem * +ioremap_fixed(resource_size_t phys_addr, unsigned long size, pgprot_t prot) +{ + enum fixed_addresses idx0, idx; + resource_size_t last_addr; + struct ioremap_map *map; + unsigned long offset; + unsigned int nrpages; + int i, slot; + + slot = -1; + for (i = 0; i < FIX_N_IOREMAPS; i++) { + map = &ioremap_maps[i]; + if (!map->addr) { + map->size = size; + slot = i; + break; + } + } + + if (slot < 0) + return NULL; + + /* Don't allow wraparound or zero size */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr) + return NULL; + + /* + * Fixmap mappings have to be page-aligned + */ + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(last_addr + 1) - phys_addr; + + /* + * Mappings have to fit in the FIX_IOREMAP area. + */ + nrpages = size >> PAGE_SHIFT; + if (nrpages > FIX_N_IOREMAPS) + return NULL; + + /* + * Ok, go for it.. + */ + idx0 = FIX_IOREMAP_BEGIN + slot; + idx = idx0; + while (nrpages > 0) { + pgprot_val(prot) |= _PAGE_WIRED; + __set_fixmap(idx, phys_addr, prot); + phys_addr += PAGE_SIZE; + idx++; + --nrpages; + } + + map->addr = (void __iomem *)(offset + map->fixmap_addr); + return map->addr; +} + +void __init iounmap_fixed(void __iomem *addr) +{ + enum fixed_addresses idx; + unsigned long virt_addr; + struct ioremap_map *map; + unsigned long offset; + unsigned int nrpages; + int i, slot; + pgprot_t prot; + + slot = -1; + for (i = 0; i < FIX_N_IOREMAPS; i++) { + map = &ioremap_maps[i]; + if (map->addr == addr) { + slot = i; + break; + } + } + + if (slot < 0) + return; + + virt_addr = (unsigned long)addr; + + offset = virt_addr & ~PAGE_MASK; + nrpages = PAGE_ALIGN(offset + map->size - 1) >> PAGE_SHIFT; + + pgprot_val(prot) = _PAGE_WIRED; + + idx = FIX_IOREMAP_BEGIN + slot + nrpages; + while (nrpages > 0) { + __clear_fixmap(idx, prot); + --idx; + --nrpages; + } + + map->size = 0; + map->addr = NULL; +} diff --git a/arch/sh/mm/nommu.c b/arch/sh/mm/nommu.c index ac16c05917ef..7694f50c9034 100644 --- a/arch/sh/mm/nommu.c +++ b/arch/sh/mm/nommu.c @@ -94,3 +94,7 @@ void __init page_table_range_init(unsigned long start, unsigned long end, void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) { } + +void pgtable_cache_init(void) +{ +} diff --git a/arch/sh/mm/pgtable.c b/arch/sh/mm/pgtable.c new file mode 100644 index 000000000000..6f21fb1d8726 --- /dev/null +++ b/arch/sh/mm/pgtable.c @@ -0,0 +1,56 @@ +#include <linux/mm.h> + +#define PGALLOC_GFP GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO + +static struct kmem_cache *pgd_cachep; +#if PAGETABLE_LEVELS > 2 +static struct kmem_cache *pmd_cachep; +#endif + +void pgd_ctor(void *x) +{ + pgd_t *pgd = x; + + memcpy(pgd + USER_PTRS_PER_PGD, + swapper_pg_dir + USER_PTRS_PER_PGD, + (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t)); +} + +void pgtable_cache_init(void) +{ + pgd_cachep = kmem_cache_create("pgd_cache", + PTRS_PER_PGD * (1<<PTE_MAGNITUDE), + PAGE_SIZE, SLAB_PANIC, pgd_ctor); +#if PAGETABLE_LEVELS > 2 + pmd_cachep = kmem_cache_create("pmd_cache", + PTRS_PER_PMD * (1<<PTE_MAGNITUDE), + PAGE_SIZE, SLAB_PANIC, NULL); +#endif +} + +pgd_t *pgd_alloc(struct mm_struct *mm) +{ + return kmem_cache_alloc(pgd_cachep, PGALLOC_GFP); +} + +void pgd_free(struct mm_struct *mm, pgd_t *pgd) +{ + kmem_cache_free(pgd_cachep, pgd); +} + +#if PAGETABLE_LEVELS > 2 +void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) +{ + set_pud(pud, __pud((unsigned long)pmd)); +} + +pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) +{ + return kmem_cache_alloc(pmd_cachep, PGALLOC_GFP); +} + +void pmd_free(struct mm_struct *mm, pmd_t *pmd) +{ + kmem_cache_free(pmd_cachep, pmd); +} +#endif /* PAGETABLE_LEVELS > 2 */ diff --git a/arch/sh/mm/pmb.c b/arch/sh/mm/pmb.c index 280f6a166035..b796b6c021b4 100644 --- a/arch/sh/mm/pmb.c +++ b/arch/sh/mm/pmb.c @@ -3,11 +3,8 @@ * * Privileged Space Mapping Buffer (PMB) Support. * - * Copyright (C) 2005, 2006, 2007 Paul Mundt - * - * P1/P2 Section mapping definitions from map32.h, which was: - * - * Copyright 2003 (c) Lineo Solutions,Inc. + * Copyright (C) 2005 - 2010 Paul Mundt + * Copyright (C) 2010 Matt Fleming * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -279,52 +276,120 @@ static void __pmb_unmap(struct pmb_entry *pmbe) } while (pmbe); } -#ifdef CONFIG_PMB -int __uses_jump_to_uncached pmb_init(void) +#ifdef CONFIG_PMB_LEGACY +static inline unsigned int pmb_ppn_in_range(unsigned long ppn) { - unsigned int i; - long size, ret; + return ppn >= __MEMORY_START && ppn < __MEMORY_START + __MEMORY_SIZE; +} - jump_to_uncached(); +static int pmb_apply_legacy_mappings(void) +{ + unsigned int applied = 0; + int i; + + pr_info("PMB: Preserving legacy mappings:\n"); /* - * Insert PMB entries for the P1 and P2 areas so that, after - * we've switched the MMU to 32-bit mode, the semantics of P1 - * and P2 are the same as in 29-bit mode, e.g. + * The following entries are setup by the bootloader. + * + * Entry VPN PPN V SZ C UB + * -------------------------------------------------------- + * 0 0xA0000000 0x00000000 1 64MB 0 0 + * 1 0xA4000000 0x04000000 1 16MB 0 0 + * 2 0xA6000000 0x08000000 1 16MB 0 0 + * 9 0x88000000 0x48000000 1 128MB 1 1 + * 10 0x90000000 0x50000000 1 128MB 1 1 + * 11 0x98000000 0x58000000 1 128MB 1 1 + * 13 0xA8000000 0x48000000 1 128MB 0 0 + * 14 0xB0000000 0x50000000 1 128MB 0 0 + * 15 0xB8000000 0x58000000 1 128MB 0 0 * - * P1 - provides a cached window onto physical memory - * P2 - provides an uncached window onto physical memory + * The only entries the we need are the ones that map the kernel + * at the cached and uncached addresses. */ - size = __MEMORY_START + __MEMORY_SIZE; - - ret = pmb_remap(P1SEG, 0x00000000, size, PMB_C); - BUG_ON(ret != size); + for (i = 0; i < PMB_ENTRY_MAX; i++) { + unsigned long addr, data; + unsigned long addr_val, data_val; + unsigned long ppn, vpn; - ret = pmb_remap(P2SEG, 0x00000000, size, PMB_WT | PMB_UB); - BUG_ON(ret != size); + addr = mk_pmb_addr(i); + data = mk_pmb_data(i); - ctrl_outl(0, PMB_IRMCR); + addr_val = __raw_readl(addr); + data_val = __raw_readl(data); - /* PMB.SE and UB[7] */ - ctrl_outl(PASCR_SE | (1 << 7), PMB_PASCR); + /* + * Skip over any bogus entries + */ + if (!(data_val & PMB_V) || !(addr_val & PMB_V)) + continue; - /* Flush out the TLB */ - i = ctrl_inl(MMUCR); - i |= MMUCR_TI; - ctrl_outl(i, MMUCR); + ppn = data_val & PMB_PFN_MASK; + vpn = addr_val & PMB_PFN_MASK; - back_to_cached(); + /* + * Only preserve in-range mappings. + */ + if (pmb_ppn_in_range(ppn)) { + unsigned int size; + char *sz_str = NULL; + + size = data_val & PMB_SZ_MASK; + + sz_str = (size == PMB_SZ_16M) ? " 16MB": + (size == PMB_SZ_64M) ? " 64MB": + (size == PMB_SZ_128M) ? "128MB": + "512MB"; + + pr_info("\t0x%08lx -> 0x%08lx [ %s %scached ]\n", + vpn >> PAGE_SHIFT, ppn >> PAGE_SHIFT, sz_str, + (data_val & PMB_C) ? "" : "un"); + + applied++; + } else { + /* + * Invalidate anything out of bounds. + */ + __raw_writel(addr_val & ~PMB_V, addr); + __raw_writel(data_val & ~PMB_V, data); + } + } - return 0; + return (applied == 0); } #else +static inline int pmb_apply_legacy_mappings(void) +{ + return 1; +} +#endif + int __uses_jump_to_uncached pmb_init(void) { int i; unsigned long addr, data; + unsigned long ret; jump_to_uncached(); + /* + * Attempt to apply the legacy boot mappings if configured. If + * this is successful then we simply carry on with those and + * don't bother establishing additional memory mappings. Dynamic + * device mappings through pmb_remap() can still be bolted on + * after this. + */ + ret = pmb_apply_legacy_mappings(); + if (ret == 0) { + back_to_cached(); + return 0; + } + + /* + * Sync our software copy of the PMB mappings with those in + * hardware. The mappings in the hardware PMB were either set up + * by the bootloader or very early on by the kernel. + */ for (i = 0; i < PMB_ENTRY_MAX; i++) { struct pmb_entry *pmbe; unsigned long vpn, ppn, flags; @@ -359,11 +424,17 @@ int __uses_jump_to_uncached pmb_init(void) WARN_ON(IS_ERR(pmbe)); } + ctrl_outl(0, PMB_IRMCR); + + /* Flush out the TLB */ + i = ctrl_inl(MMUCR); + i |= MMUCR_TI; + ctrl_outl(i, MMUCR); + back_to_cached(); return 0; } -#endif /* CONFIG_PMB */ static int pmb_seq_show(struct seq_file *file, void *iter) { @@ -462,6 +533,5 @@ static int __init pmb_sysdev_init(void) { return sysdev_driver_register(&cpu_sysdev_class, &pmb_sysdev_driver); } - subsys_initcall(pmb_sysdev_init); #endif diff --git a/arch/sh/mm/tlb-pteaex.c b/arch/sh/mm/tlb-pteaex.c index 409b7c2b4b9d..88c8bb05e16d 100644 --- a/arch/sh/mm/tlb-pteaex.c +++ b/arch/sh/mm/tlb-pteaex.c @@ -76,3 +76,69 @@ void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid, __raw_writel(asid, MMU_UTLB_ADDRESS_ARRAY2 | MMU_PAGE_ASSOC_BIT); back_to_cached(); } + +/* + * Load the entry for 'addr' into the TLB and wire the entry. + */ +void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + /* Load the entry into the TLB */ + __update_tlb(vma, addr, pte); + + /* ... and wire it up. */ + status = ctrl_inl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to wire the last TLB entry slot. + */ + BUG_ON(!--urb); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + ctrl_outl(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} + +/* + * Unwire the last wired TLB entry. + * + * It should also be noted that it is not possible to wire and unwire + * TLB entries in an arbitrary order. If you wire TLB entry N, followed + * by entry N+1, you must unwire entry N+1 first, then entry N. In this + * respect, it works like a stack or LIFO queue. + */ +void tlb_unwire_entry(void) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + status = ctrl_inl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to unwire a TLB entry when none + * have been wired. + */ + BUG_ON(urb++ == MMUCR_URB_NENTRIES); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + ctrl_outl(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c index 8cf550e2570f..4c6234743318 100644 --- a/arch/sh/mm/tlb-sh4.c +++ b/arch/sh/mm/tlb-sh4.c @@ -81,3 +81,69 @@ void __uses_jump_to_uncached local_flush_tlb_one(unsigned long asid, ctrl_outl(data, addr); back_to_cached(); } + +/* + * Load the entry for 'addr' into the TLB and wire the entry. + */ +void tlb_wire_entry(struct vm_area_struct *vma, unsigned long addr, pte_t pte) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + /* Load the entry into the TLB */ + __update_tlb(vma, addr, pte); + + /* ... and wire it up. */ + status = ctrl_inl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to wire the last TLB entry slot. + */ + BUG_ON(!--urb); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + ctrl_outl(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} + +/* + * Unwire the last wired TLB entry. + * + * It should also be noted that it is not possible to wire and unwire + * TLB entries in an arbitrary order. If you wire TLB entry N, followed + * by entry N+1, you must unwire entry N+1 first, then entry N. In this + * respect, it works like a stack or LIFO queue. + */ +void tlb_unwire_entry(void) +{ + unsigned long status, flags; + int urb; + + local_irq_save(flags); + + status = ctrl_inl(MMUCR); + urb = (status & MMUCR_URB) >> MMUCR_URB_SHIFT; + status &= ~MMUCR_URB; + + /* + * Make sure we're not trying to unwire a TLB entry when none + * have been wired. + */ + BUG_ON(urb++ == MMUCR_URB_NENTRIES); + + urb = urb % MMUCR_URB_NENTRIES; + + status |= (urb << MMUCR_URB_SHIFT); + ctrl_outl(status, MMUCR); + ctrl_barrier(); + + local_irq_restore(flags); +} diff --git a/arch/sh/mm/tlbflush_64.c b/arch/sh/mm/tlbflush_64.c index de0b0e881823..706da1d3a67a 100644 --- a/arch/sh/mm/tlbflush_64.c +++ b/arch/sh/mm/tlbflush_64.c @@ -36,7 +36,7 @@ extern void die(const char *,struct pt_regs *,long); static inline void print_prots(pgprot_t prot) { - printk("prot is 0x%08lx\n",pgprot_val(prot)); + printk("prot is 0x%016llx\n",pgprot_val(prot)); printk("%s %s %s %s %s\n",PPROT(_PAGE_SHARED),PPROT(_PAGE_READ), PPROT(_PAGE_EXECUTE),PPROT(_PAGE_WRITE),PPROT(_PAGE_USER)); |