Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758481AbZFIGne (ORCPT ); Tue, 9 Jun 2009 02:43:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758373AbZFIGnZ (ORCPT ); Tue, 9 Jun 2009 02:43:25 -0400 Received: from 219-87-157-169.static.tfn.net.tw ([219.87.157.169]:46270 "EHLO mswedge2.sunplus.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758331AbZFIGnV (ORCPT ); Tue, 9 Jun 2009 02:43:21 -0400 To: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Arnd Bergmann , Andrew Morton , torvalds@linux-foundation.org MIME-Version: 1.0 Subject: [PATCH 26/27] score: create mm files cache.c extable.c fault.c init.c X-Mailer: Lotus Notes Release 6.5 September 26, 2003 Message-ID: From: liqin.chen@sunplusct.com Date: Tue, 9 Jun 2009 14:38:30 +0800 X-MIMETrack: Serialize by Router on ctmail01/SunplusCT(Release 7.0.3FP1|February 24, 2008) at 2009/06/09 ?? 02:38:30, Serialize complete at 2009/06/09 ?? 02:38:30 Content-Type: text/plain; charset="US-ASCII" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 26542 Lines: 825 >From a8b318df27a959dc552d99f6502e24e35b33e2a1 Mon Sep 17 00:00:00 2001 From: Chen Liqin Date: Tue, 9 Jun 2009 13:43:19 +0800 Subject: [PATCH 26/27] score: create mm files cache.c extable.c fault.c init.c Signed-off-by: Chen Liqin --- arch/score/mm/cache.c | 308 +++++++++++++++++++++++++++++++++++++++++++++++ arch/score/mm/extable.c | 38 ++++++ arch/score/mm/fault.c | 235 ++++++++++++++++++++++++++++++++++++ arch/score/mm/init.c | 173 ++++++++++++++++++++++++++ 4 files changed, 754 insertions(+), 0 deletions(-) create mode 100644 arch/score/mm/cache.c create mode 100644 arch/score/mm/extable.c create mode 100644 arch/score/mm/fault.c create mode 100644 arch/score/mm/init.c diff --git a/arch/score/mm/cache.c b/arch/score/mm/cache.c new file mode 100644 index 0000000..1ebc67f --- /dev/null +++ b/arch/score/mm/cache.c @@ -0,0 +1,308 @@ +/* + * arch/score/mm/cache.c + * + * Score Processor version. + * + * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. + * Lennox Wu + * Chen Liqin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include + +#include + +/* Cache operations. */ +void (*flush_cache_all)(void); +void (*__flush_cache_all)(void); +void (*flush_cache_mm)(struct mm_struct *mm); +void (*flush_cache_range)(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +void (*flush_cache_page)(struct vm_area_struct *vma, + unsigned long page, unsigned long pfn); +void (*flush_icache_range)(unsigned long start, unsigned long end); +void (*__flush_cache_vmap)(void); +void (*__flush_cache_vunmap)(void); +void (*flush_cache_sigtramp)(unsigned long addr); +void (*flush_data_cache_page)(unsigned long addr); +EXPORT_SYMBOL(flush_data_cache_page); +void (*flush_icache_all)(void); + +/*Score 7 cache operations*/ +static inline void s7___flush_cache_all(void); +static void s7_flush_cache_mm(struct mm_struct *mm); +static void s7_flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +static void s7_flush_cache_page(struct vm_area_struct *vma, + unsigned long page, unsigned long pfn); +static void s7_flush_icache_range(unsigned long start, unsigned long end); +static void s7_flush_cache_sigtramp(unsigned long addr); +static void s7_flush_data_cache_page(unsigned long addr); +static void s7_flush_dcache_range(unsigned long start, unsigned long end); + +void __update_cache(struct vm_area_struct *vma, unsigned long address, + pte_t pte) +{ + struct page *page; + unsigned long pfn, addr; + int exec = (vma->vm_flags & VM_EXEC); + + pfn = pte_pfn(pte); + if (unlikely(!pfn_valid(pfn))) + return; + page = pfn_to_page(pfn); + if (page_mapping(page) && test_bit(PG_arch_1, &page->flags)) { + addr = (unsigned long) page_address(page); + if (exec) + s7_flush_data_cache_page(addr); + clear_bit(PG_arch_1, &page->flags); + } +} + +static inline void setup_protection_map(void) +{ + protection_map[0] = PAGE_NONE; + protection_map[1] = PAGE_READONLY; + protection_map[2] = PAGE_COPY; + protection_map[3] = PAGE_COPY; + protection_map[4] = PAGE_READONLY; + protection_map[5] = PAGE_READONLY; + protection_map[6] = PAGE_COPY; + protection_map[7] = PAGE_COPY; + protection_map[8] = PAGE_NONE; + protection_map[9] = PAGE_READONLY; + protection_map[10] = PAGE_SHARED; + protection_map[11] = PAGE_SHARED; + protection_map[12] = PAGE_READONLY; + protection_map[13] = PAGE_READONLY; + protection_map[14] = PAGE_SHARED; + protection_map[15] = PAGE_SHARED; +} + +void __devinit cpu_cache_init(void) +{ + flush_cache_all = s7_flush_cache_all; + __flush_cache_all = s7___flush_cache_all; + flush_cache_mm = s7_flush_cache_mm; + flush_cache_range = s7_flush_cache_range; + flush_cache_page = s7_flush_cache_page; + flush_icache_range = s7_flush_icache_range; + flush_cache_sigtramp = s7_flush_cache_sigtramp; + flush_data_cache_page = s7_flush_data_cache_page; + + setup_protection_map(); +} + +void s7_flush_icache_all(void) +{ + __asm__ __volatile__( + "la r8, s7_flush_icache_all\n" + "cache 0x10, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + : : : "r8"); +} + +void s7_flush_dcache_all(void) +{ + __asm__ __volatile__( + "la r8, s7_flush_dcache_all\n" + "cache 0x1f, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + "cache 0x1a, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + : : : "r8"); +} + +void s7_flush_cache_all(void) +{ + __asm__ __volatile__( + "la r8, s7_flush_cache_all\n" + "cache 0x10, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + "cache 0x1f, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + "cache 0x1a, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + : : : "r8"); +} + +void s7___flush_cache_all(void) +{ + __asm__ __volatile__( + "la r8, s7_flush_cache_all\n" + "cache 0x10, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + "cache 0x1f, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + "cache 0x1a, [r8, 0]\n" + "nop\nnop\nnop\nnop\nnop\nnop\n" + : : : "r8"); +} + +static void s7_flush_cache_mm(struct mm_struct *mm) +{ + if (!(mm->context)) + return; + s7_flush_cache_all(); +} + +/*if we flush a range precisely , the processing may be very long. +We must check each page in the range whether present. If the page is present, +we can flush the range in the page. Be careful, the range may be cross two +page, a page is present and another is not present. +*/ +/* +The interface is provided in hopes that the port can find +a suitably efficient method for removing multiple page +sized regions from the cache. +*/ +static void +s7_flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + struct mm_struct *mm = vma->vm_mm; + int exec = vma->vm_flags & VM_EXEC; + pgd_t *pgdp; + pud_t *pudp; + pmd_t *pmdp; + pte_t *ptep; + + if (!(mm->context)) + return; + + pgdp = pgd_offset(mm, start); + pudp = pud_offset(pgdp, start); + pmdp = pmd_offset(pudp, start); + ptep = pte_offset(pmdp, start); + + while (start <= end) { + unsigned long tmpend; + pgdp = pgd_offset(mm, start); + pudp = pud_offset(pgdp, start); + pmdp = pmd_offset(pudp, start); + ptep = pte_offset(pmdp, start); + + if (!(pte_val(*ptep) & _PAGE_PRESENT)) { + start = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1); + continue; + } + tmpend = (start | (PAGE_SIZE-1)) > end ? + end : (start | (PAGE_SIZE-1)); + + s7_flush_dcache_range(start, tmpend); + if (exec) + s7_flush_icache_range(start, tmpend); + start = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1); + } +} + +static void +s7_flush_cache_page(struct vm_area_struct *vma, + unsigned long addr, unsigned long pfn) +{ + int exec = vma->vm_flags & VM_EXEC; + unsigned long kaddr = 0xa0000000 | (pfn << PAGE_SHIFT); + + s7_flush_dcache_range(kaddr, kaddr + PAGE_SIZE); + + if (exec) + s7_flush_icache_range(kaddr, kaddr + PAGE_SIZE); +} + +static void s7_flush_cache_sigtramp(unsigned long addr) +{ + __asm__ __volatile__( + "cache 0x02, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + "cache 0x02, [%0, 0x4]\n" + "nop\nnop\nnop\nnop\nnop\n" + + "cache 0x0d, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + "cache 0x0d, [%0, 0x4]\n" + "nop\nnop\nnop\nnop\nnop\n" + + "cache 0x1a, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + : : "r" (addr)); +} + +/* +Just flush entire Dcache!! +You must ensure the page doesn't include instructions, because +the function will not flush the Icache. +The addr must be cache aligned. +*/ +static void s7_flush_data_cache_page(unsigned long addr) +{ + unsigned int i; + for (i = 0; i < (PAGE_SIZE / L1_CACHE_BYTES); i += L1_CACHE_BYTES) { + __asm__ __volatile__( + "cache 0x0e, [%0, 0]\n" + "cache 0x1a, [%0, 0]\n" + "nop\n" + : : "r" (addr)); + addr += L1_CACHE_BYTES; + } +} + +/* +1. WB and invalid a cache line of Dcache +2. Drain Write Buffer +the range must be smaller than PAGE_SIZE +*/ +static void s7_flush_dcache_range(unsigned long start, unsigned long end) +{ + int size, i; + + start = start & ~(L1_CACHE_BYTES - 1); + end = end & ~(L1_CACHE_BYTES - 1); + size = end - start; + /* flush dcache to ram, and invalidate dcache lines. */ + for (i = 0; i < size; i += L1_CACHE_BYTES) { + __asm__ __volatile__( + "cache 0x0e, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + "cache 0x1a, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + : : "r" (start)); + start += L1_CACHE_BYTES; + } +} + +static void s7_flush_icache_range(unsigned long start, unsigned long end) +{ + int size, i; + start = start & ~(L1_CACHE_BYTES - 1); + end = end & ~(L1_CACHE_BYTES - 1); + + size = end - start; + /* invalidate icache lines. */ + for (i = 0; i < size; i += L1_CACHE_BYTES) { + __asm__ __volatile__( + "cache 0x02, [%0, 0]\n" + "nop\nnop\nnop\nnop\nnop\n" + : : "r" (start)); + start += L1_CACHE_BYTES; + } +} diff --git a/arch/score/mm/extable.c b/arch/score/mm/extable.c new file mode 100644 index 0000000..01ff644 --- /dev/null +++ b/arch/score/mm/extable.c @@ -0,0 +1,38 @@ +/* + * arch/score/mm/extable.c + * + * Score Processor version. + * + * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. + * Lennox Wu + * Chen Liqin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include + +int fixup_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + + fixup = search_exception_tables(regs->cp0_epc); + if (fixup) { + regs->cp0_epc = fixup->fixup; + return 1; + } + return 0; +} diff --git a/arch/score/mm/fault.c b/arch/score/mm/fault.c new file mode 100644 index 0000000..47b600e --- /dev/null +++ b/arch/score/mm/fault.c @@ -0,0 +1,235 @@ +/* + * arch/score/mm/fault.c + * + * Score Processor version. + * + * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. + * Lennox Wu + * Chen Liqin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * This routine handles page faults. It determines the address, + * and the problem, and then passes it off to one of the appropriate + * routines. + */ +asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long write, + unsigned long address) +{ + struct vm_area_struct *vma = NULL; + struct task_struct *tsk = current; + struct mm_struct *mm = tsk->mm; + const int field = sizeof(unsigned long) * 2; + siginfo_t info; + int fault; + + info.si_code = SEGV_MAPERR; + + /* + * We fault-in kernel-space virtual memory on-demand. The + * 'reference' page table is init_mm.pgd. + * + * NOTE! We MUST NOT take any locks for this case. We may + * be in an interrupt or a critical region, and should + * only copy the information from the master page table, + * nothing more. + */ + if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END)) + goto vmalloc_fault; +#ifdef MODULE_START + if (unlikely(address >= MODULE_START && address < MODULE_END)) + goto vmalloc_fault; +#endif + + /* + * If we're in an interrupt or have no user + * context, we must not take the fault.. + */ + if (in_atomic() || !mm) + goto bad_area_nosemaphore; + + down_read(&mm->mmap_sem); + vma = find_vma(mm, address); + if (!vma) + goto bad_area; + if (vma->vm_start <= address) + goto good_area; + if (!(vma->vm_flags & VM_GROWSDOWN)) + goto bad_area; + if (expand_stack(vma, address)) + goto bad_area; + /* + * Ok, we have a good vm_area for this memory access, so + * we can handle it.. + */ +good_area: + info.si_code = SEGV_ACCERR; + + if (write) { + if (!(vma->vm_flags & VM_WRITE)) + goto bad_area; + } else { + if (!(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))) + goto bad_area; + } + +survive: + /* + * If for any reason at all we couldn't handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ + fault = handle_mm_fault(mm, vma, address, write); + if (unlikely(fault & VM_FAULT_ERROR)) { + if (fault & VM_FAULT_OOM) + goto out_of_memory; + else if (fault & VM_FAULT_SIGBUS) + goto do_sigbus; + BUG(); + } + if (fault & VM_FAULT_MAJOR) + tsk->maj_flt++; + else + tsk->min_flt++; + + up_read(&mm->mmap_sem); + return; + + /* + * Something tried to access memory that isn't in our memory map.. + * Fix it, but check if it's kernel or user first.. + */ +bad_area: + up_read(&mm->mmap_sem); + +bad_area_nosemaphore: + /* User mode accesses just cause a SIGSEGV */ + if (user_mode(regs)) { + tsk->thread.cp0_badvaddr = address; + tsk->thread.error_code = write; + info.si_signo = SIGSEGV; + info.si_errno = 0; + /* info.si_code has been set above */ + info.si_addr = (void __user *) address; + force_sig_info(SIGSEGV, &info, tsk); + return; + } + +no_context: + /* Are we prepared to handle this kernel fault? */ + if (fixup_exception(regs)) { + current->thread.cp0_baduaddr = address; + return; + } + + /* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + */ + bust_spinlocks(1); + + printk(KERN_ALERT "CPU %d Unable to handle kernel paging request at " + "virtual address %0*lx, epc == %0*lx, ra == %0*lx\n", + 0, field, address, field, regs->cp0_epc, + field, regs->regs[3]); + die("Oops", regs); + + /* + * We ran out of memory, or some other thing happened to us that made + * us unable to handle the page fault gracefully. + */ +out_of_memory: + up_read(&mm->mmap_sem); + if (is_global_init(tsk)) { + yield(); + down_read(&mm->mmap_sem); + goto survive; + } + printk("VM: killing process %s\n", tsk->comm); + if (user_mode(regs)) + do_group_exit(SIGKILL); + goto no_context; + +do_sigbus: + up_read(&mm->mmap_sem); + /* Kernel mode? Handle exceptions or die */ + if (!user_mode(regs)) + goto no_context; + else + /* + * Send a sigbus, regardless of whether we were in kernel + * or user mode. + */ + tsk->thread.cp0_badvaddr = address; + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_ADRERR; + info.si_addr = (void __user *) address; + force_sig_info(SIGBUS, &info, tsk); + return; +vmalloc_fault: + { + /* + * Synchronize this task's top level page-table + * with the 'reference' page table. + * + * Do _not_ use "tsk" here. We might be inside + * an interrupt in the middle of a task switch.. + */ + int offset = __pgd_offset(address); + pgd_t *pgd, *pgd_k; + pud_t *pud, *pud_k; + pmd_t *pmd, *pmd_k; + pte_t *pte_k; + + pgd = (pgd_t *) pgd_current + offset; + pgd_k = init_mm.pgd + offset; + + if (!pgd_present(*pgd_k)) + goto no_context; + set_pgd(pgd, *pgd_k); + + pud = pud_offset(pgd, address); + pud_k = pud_offset(pgd_k, address); + if (!pud_present(*pud_k)) + goto no_context; + + pmd = pmd_offset(pud, address); + pmd_k = pmd_offset(pud_k, address); + if (!pmd_present(*pmd_k)) + goto no_context; + set_pmd(pmd, *pmd_k); + + pte_k = pte_offset_kernel(pmd_k, address); + if (!pte_present(*pte_k)) + goto no_context; + return; + } +} diff --git a/arch/score/mm/init.c b/arch/score/mm/init.c new file mode 100644 index 0000000..7780eec --- /dev/null +++ b/arch/score/mm/init.c @@ -0,0 +1,173 @@ +/* + * arch/score/mm/init.c + * + * Score Processor version. + * + * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. + * Lennox Wu + * Chen Liqin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see the file COPYING, or write + * to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); + +/* + * We have up to 8 empty zeroed pages so we can map one of the right colour + * when needed. + */ +unsigned long zero_page_mask; +unsigned long empty_zero_page; +EXPORT_SYMBOL_GPL(empty_zero_page); + +static struct kcore_list kcore_mem, kcore_vmalloc; + +unsigned long setup_zero_pages(void) +{ + unsigned int order = 0; + unsigned long size; + struct page *page; + + empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order); + if (!empty_zero_page) + panic("Oh boy, that early out of memory?"); + + page = virt_to_page((void *) empty_zero_page); + split_page(page, order); + while (page < virt_to_page((void *) (empty_zero_page + + (PAGE_SIZE << order)))) { + SetPageReserved(page); + page++; + } + + size = PAGE_SIZE << order; + zero_page_mask = (size - 1) & PAGE_MASK; + + return 1UL << order; +} + +#ifndef CONFIG_NEED_MULTIPLE_NODES +static int __init page_is_ram(unsigned long pagenr) +{ + if (pagenr >= min_low_pfn && pagenr < max_low_pfn) + return 1; + else + return 0; +} + +void __init paging_init(void) +{ + unsigned long max_zone_pfns[MAX_NR_ZONES]; + unsigned long lastpfn; + + pagetable_init(); + max_zone_pfns[ZONE_NORMAL] = max_low_pfn; + lastpfn = max_low_pfn; + free_area_init_nodes(max_zone_pfns); +} + +void __init mem_init(void) +{ + unsigned long codesize, reservedpages, datasize, initsize; + unsigned long tmp, ram = 0; + + max_mapnr = max_low_pfn; + high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); + totalram_pages += free_all_bootmem(); + totalram_pages -= setup_zero_pages(); /* Setup zeroed pages. */ + reservedpages = 0; + + for (tmp = 0; tmp < max_low_pfn; tmp++) + if (page_is_ram(tmp)) { + ram++; + if (PageReserved(pfn_to_page(tmp))) + reservedpages++; + } + + num_physpages = ram; + codesize = (unsigned long) &_etext - (unsigned long) &_text; + datasize = (unsigned long) &_edata - (unsigned long) &_etext; + initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; + + kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT); + kclist_add(&kcore_vmalloc, (void *) VMALLOC_START, + VMALLOC_END - VMALLOC_START); + + printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " + "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n", + (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), + ram << (PAGE_SHIFT-10), codesize >> 10, + reservedpages << (PAGE_SHIFT-10), datasize >> 10, + initsize >> 10, + (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))); +} +#endif /* !CONFIG_NEED_MULTIPLE_NODES */ + +void free_init_pages(const char *what, unsigned long begin, unsigned long end) +{ + unsigned long pfn; + + for (pfn = PFN_UP(begin); pfn < PFN_DOWN(end); pfn++) { + struct page *page = pfn_to_page(pfn); + void *addr = phys_to_virt(PFN_PHYS(pfn)); + + ClearPageReserved(page); + init_page_count(page); + memset(addr, POISON_FREE_INITMEM, PAGE_SIZE); + __free_page(page); + totalram_pages++; + } + printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ + free_init_pages("initrd memory", + virt_to_phys((void *) start), + virt_to_phys((void *) end)); +} +#endif + +void __init_refok free_initmem(void) +{ + free_init_pages("unused kernel memory", + (unsigned long)__init_begin, (unsigned long)__init_end); +} + +unsigned long pgd_current; + +#define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<