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-rw-r--r--arch/score/mm/Makefile6
-rw-r--r--arch/score/mm/cache.c281
-rw-r--r--arch/score/mm/extable.c40
-rw-r--r--arch/score/mm/fault.c237
-rw-r--r--arch/score/mm/init.c109
-rw-r--r--arch/score/mm/pgtable.c52
-rw-r--r--arch/score/mm/tlb-miss.S199
-rw-r--r--arch/score/mm/tlb-score.c251
8 files changed, 0 insertions, 1175 deletions
diff --git a/arch/score/mm/Makefile b/arch/score/mm/Makefile
deleted file mode 100644
index 7b1e29b1f8cd..000000000000
--- a/arch/score/mm/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-#
-# Makefile for the Linux/SCORE-specific parts of the memory manager.
-#
-
-obj-y += cache.o extable.o fault.o init.o \
- tlb-miss.o tlb-score.o pgtable.o
diff --git a/arch/score/mm/cache.c b/arch/score/mm/cache.c
deleted file mode 100644
index b4bcfd3e8393..000000000000
--- a/arch/score/mm/cache.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * arch/score/mm/cache.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/init.h>
-#include <linux/linkage.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/fs.h>
-
-#include <asm/mmu_context.h>
-
-/*
-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 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;
- }
-}
-
-void flush_dcache_page(struct page *page)
-{
- struct address_space *mapping = page_mapping(page);
- unsigned long addr;
-
- if (PageHighMem(page))
- return;
- if (mapping && !mapping_mapped(mapping)) {
- set_bit(PG_dcache_dirty, &(page)->flags);
- return;
- }
-
- /*
- * We could delay the flush for the !page_mapping case too. But that
- * case is for exec env/arg pages and those are %99 certainly going to
- * get faulted into the tlb (and thus flushed) anyways.
- */
- addr = (unsigned long) page_address(page);
- flush_data_cache_page(addr);
-}
-EXPORT_SYMBOL(flush_dcache_page);
-
-/* called by update_mmu_cache. */
-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_dcache_dirty, &(page)->flags)) {
- addr = (unsigned long) page_address(page);
- if (exec)
- flush_data_cache_page(addr);
- clear_bit(PG_dcache_dirty, &(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 cpu_cache_init(void)
-{
- setup_protection_map();
-}
-
-void flush_icache_all(void)
-{
- __asm__ __volatile__(
- "la r8, flush_icache_all\n"
- "cache 0x10, [r8, 0]\n"
- "nop\nnop\nnop\nnop\nnop\nnop\n"
- : : : "r8");
-}
-
-void flush_dcache_all(void)
-{
- __asm__ __volatile__(
- "la r8, 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 flush_cache_all(void)
-{
- __asm__ __volatile__(
- "la r8, 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 flush_cache_mm(struct mm_struct *mm)
-{
- if (!(mm->context))
- return;
- 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.
-*/
-void 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));
-
- flush_dcache_range(start, tmpend);
- if (exec)
- flush_icache_range(start, tmpend);
- start = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
- }
-}
-
-void 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);
-
- flush_dcache_range(kaddr, kaddr + PAGE_SIZE);
-
- if (exec)
- flush_icache_range(kaddr, kaddr + PAGE_SIZE);
-}
-
-void 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));
-}
-
-/*
-1. WB and invalid a cache line of Dcache
-2. Drain Write Buffer
-the range must be smaller than PAGE_SIZE
-*/
-void 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;
- }
-}
-
-void 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;
- }
-}
-EXPORT_SYMBOL(flush_icache_range);
diff --git a/arch/score/mm/extable.c b/arch/score/mm/extable.c
deleted file mode 100644
index 6736a3ad6286..000000000000
--- a/arch/score/mm/extable.c
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * arch/score/mm/extable.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/extable.h>
-#include <linux/ptrace.h>
-#include <asm/extable.h>
-
-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
deleted file mode 100644
index b85fad4f0874..000000000000
--- a/arch/score/mm/fault.c
+++ /dev/null
@@ -1,237 +0,0 @@
-/*
- * arch/score/mm/fault.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/extable.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/uaccess.h>
-
-/*
- * 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;
- unsigned long flags = 0;
- 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 (pagefault_disabled() || !mm)
- goto bad_area_nosemaphore;
-
- if (user_mode(regs))
- flags |= FAULT_FLAG_USER;
-
- 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;
- flags |= FAULT_FLAG_WRITE;
- } else {
- if (!(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC)))
- goto bad_area;
- }
-
- /*
- * 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(vma, address, flags);
- if (unlikely(fault & VM_FAULT_ERROR)) {
- if (fault & VM_FAULT_OOM)
- goto out_of_memory;
- else if (fault & VM_FAULT_SIGSEGV)
- goto bad_area;
- 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 (!user_mode(regs))
- goto no_context;
- pagefault_out_of_memory();
- return;
-
-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
deleted file mode 100644
index 444c26c0f750..000000000000
--- a/arch/score/mm/init.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * arch/score/mm/init.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/errno.h>
-#include <linux/bootmem.h>
-#include <linux/kernel.h>
-#include <linux/gfp.h>
-#include <linux/init.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/pagemap.h>
-#include <linux/kcore.h>
-#include <linux/sched.h>
-#include <linux/initrd.h>
-
-#include <asm/sections.h>
-#include <asm/tlb.h>
-
-unsigned long empty_zero_page;
-EXPORT_SYMBOL_GPL(empty_zero_page);
-
-static void setup_zero_page(void)
-{
- struct page *page;
-
- empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 0);
- if (!empty_zero_page)
- panic("Oh boy, that early out of memory?");
-
- page = virt_to_page((void *) empty_zero_page);
- mark_page_reserved(page);
-}
-
-#ifndef CONFIG_NEED_MULTIPLE_NODES
-int 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)
-{
- high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
- free_all_bootmem();
- setup_zero_page(); /* Setup zeroed pages. */
-
- mem_init_print_info(NULL);
-}
-#endif /* !CONFIG_NEED_MULTIPLE_NODES */
-
-#ifdef CONFIG_BLK_DEV_INITRD
-void free_initrd_mem(unsigned long start, unsigned long end)
-{
- free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
- "initrd");
-}
-#endif
-
-void __ref free_initmem(void)
-{
- free_initmem_default(POISON_FREE_INITMEM);
-}
-
-unsigned long pgd_current;
-
-#define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
-
-/*
- * gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER
- * are constants. So we use the variants from asm-offset.h until that gcc
- * will officially be retired.
- */
-pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PTE_ORDER);
-pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER);
diff --git a/arch/score/mm/pgtable.c b/arch/score/mm/pgtable.c
deleted file mode 100644
index 6408bb73d3cc..000000000000
--- a/arch/score/mm/pgtable.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * arch/score/mm/pgtable-32.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/bootmem.h>
-#include <linux/init.h>
-#include <linux/pfn.h>
-#include <linux/mm.h>
-
-void pgd_init(unsigned long page)
-{
- unsigned long *p = (unsigned long *) page;
- int i;
-
- for (i = 0; i < USER_PTRS_PER_PGD; i += 8) {
- p[i + 0] = (unsigned long) invalid_pte_table;
- p[i + 1] = (unsigned long) invalid_pte_table;
- p[i + 2] = (unsigned long) invalid_pte_table;
- p[i + 3] = (unsigned long) invalid_pte_table;
- p[i + 4] = (unsigned long) invalid_pte_table;
- p[i + 5] = (unsigned long) invalid_pte_table;
- p[i + 6] = (unsigned long) invalid_pte_table;
- p[i + 7] = (unsigned long) invalid_pte_table;
- }
-}
-
-void __init pagetable_init(void)
-{
- /* Initialize the entire pgd. */
- pgd_init((unsigned long)swapper_pg_dir);
-}
diff --git a/arch/score/mm/tlb-miss.S b/arch/score/mm/tlb-miss.S
deleted file mode 100644
index f27651914e8d..000000000000
--- a/arch/score/mm/tlb-miss.S
+++ /dev/null
@@ -1,199 +0,0 @@
-/*
- * arch/score/mm/tlbex.S
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <asm/asmmacro.h>
-#include <asm/pgtable-bits.h>
-#include <asm/scoreregs.h>
-
-/*
-* After this macro runs, the pte faulted on is
-* in register PTE, a ptr into the table in which
-* the pte belongs is in PTR.
-*/
- .macro load_pte, pte, ptr
- la \ptr, pgd_current
- lw \ptr, [\ptr, 0]
- mfcr \pte, cr6
- srli \pte, \pte, 22
- slli \pte, \pte, 2
- add \ptr, \ptr, \pte
- lw \ptr, [\ptr, 0]
- mfcr \pte, cr6
- srli \pte, \pte, 10
- andi \pte, 0xffc
- add \ptr, \ptr, \pte
- lw \pte, [\ptr, 0]
- .endm
-
- .macro pte_reload, ptr
- lw \ptr, [\ptr, 0]
- mtcr \ptr, cr12
- nop
- nop
- nop
- nop
- nop
- .endm
-
- .macro do_fault, write
- SAVE_ALL
- mfcr r6, cr6
- mv r4, r0
- ldi r5, \write
- la r8, do_page_fault
- brl r8
- j ret_from_exception
- .endm
-
- .macro pte_writable, pte, ptr, label
- andi \pte, 0x280
- cmpi.c \pte, 0x280
- bne \label
- lw \pte, [\ptr, 0] /*reload PTE*/
- .endm
-
-/*
- * Make PTE writable, update software status bits as well,
- * then store at PTR.
- */
- .macro pte_makewrite, pte, ptr
- ori \pte, 0x426
- sw \pte, [\ptr, 0]
- .endm
-
- .text
-ENTRY(score7_FTLB_refill_Handler)
- la r31, pgd_current /* get pgd pointer */
- lw r31, [r31, 0] /* get the address of PGD */
- mfcr r30, cr6
- srli r30, r30, 22 /* PGDIR_SHIFT = 22*/
- slli r30, r30, 2
- add r31, r31, r30
- lw r31, [r31, 0] /* get the address of the start address of PTE table */
-
- mfcr r30, cr9
- andi r30, 0xfff /* equivalent to get PET index and right shift 2 bits */
- add r31, r31, r30
- lw r30, [r31, 0] /* load pte entry */
- mtcr r30, cr12
- nop
- nop
- nop
- nop
- nop
- mtrtlb
- nop
- nop
- nop
- nop
- nop
- rte /* 6 cycles to make sure tlb entry works */
-
-ENTRY(score7_KSEG_refill_Handler)
- la r31, pgd_current /* get pgd pointer */
- lw r31, [r31, 0] /* get the address of PGD */
- mfcr r30, cr6
- srli r30, r30, 22 /* PGDIR_SHIFT = 22 */
- slli r30, r30, 2
- add r31, r31, r30
- lw r31, [r31, 0] /* get the address of the start address of PTE table */
-
- mfcr r30, cr6 /* get Bad VPN */
- srli r30, r30, 10
- andi r30, 0xffc /* PTE VPN mask (bit 11~2) */
-
- add r31, r31, r30
- lw r30, [r31, 0] /* load pte entry */
- mtcr r30, cr12
- nop
- nop
- nop
- nop
- nop
- mtrtlb
- nop
- nop
- nop
- nop
- nop
- rte /* 6 cycles to make sure tlb entry works */
-
-nopage_tlbl:
- do_fault 0 /* Read */
-
-ENTRY(handle_tlb_refill)
- load_pte r30, r31
- pte_writable r30, r31, handle_tlb_refill_nopage
- pte_makewrite r30, r31 /* Access|Modify|Dirty|Valid */
- pte_reload r31
- mtrtlb
- nop
- nop
- nop
- nop
- nop
- rte
-handle_tlb_refill_nopage:
- do_fault 0 /* Read */
-
-ENTRY(handle_tlb_invaild)
- load_pte r30, r31
- stlb /* find faulting entry */
- pte_writable r30, r31, handle_tlb_invaild_nopage
- pte_makewrite r30, r31 /* Access|Modify|Dirty|Valid */
- pte_reload r31
- mtptlb
- nop
- nop
- nop
- nop
- nop
- rte
-handle_tlb_invaild_nopage:
- do_fault 0 /* Read */
-
-ENTRY(handle_mod)
- load_pte r30, r31
- stlb /* find faulting entry */
- andi r30, _PAGE_WRITE /* Writable? */
- cmpz.c r30
- beq nowrite_mod
- lw r30, [r31, 0] /* reload into r30 */
-
- /* Present and writable bits set, set accessed and dirty bits. */
- pte_makewrite r30, r31
-
- /* Now reload the entry into the tlb. */
- pte_reload r31
- mtptlb
- nop
- nop
- nop
- nop
- nop
- rte
-
-nowrite_mod:
- do_fault 1 /* Write */
diff --git a/arch/score/mm/tlb-score.c b/arch/score/mm/tlb-score.c
deleted file mode 100644
index 004073717de0..000000000000
--- a/arch/score/mm/tlb-score.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/*
- * arch/score/mm/tlb-score.c
- *
- * Score Processor version.
- *
- * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
- * Lennox Wu <lennox.wu@sunplusct.com>
- * Chen Liqin <liqin.chen@sunplusct.com>
- *
- * 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 <linux/highmem.h>
-#include <linux/module.h>
-
-#include <asm/irq.h>
-#include <asm/mmu_context.h>
-#include <asm/tlb.h>
-
-#define TLBSIZE 32
-
-unsigned long asid_cache = ASID_FIRST_VERSION;
-EXPORT_SYMBOL(asid_cache);
-
-void local_flush_tlb_all(void)
-{
- unsigned long flags;
- unsigned long old_ASID;
- int entry;
-
- local_irq_save(flags);
- old_ASID = pevn_get() & ASID_MASK;
- pectx_set(0); /* invalid */
- entry = tlblock_get(); /* skip locked entries*/
-
- for (; entry < TLBSIZE; entry++) {
- tlbpt_set(entry);
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(old_ASID);
- local_irq_restore(flags);
-}
-
-/*
- * If mm is currently active_mm, we can't really drop it. Instead,
- * we will get a new one for it.
- */
-static inline void
-drop_mmu_context(struct mm_struct *mm)
-{
- unsigned long flags;
-
- local_irq_save(flags);
- get_new_mmu_context(mm);
- pevn_set(mm->context & ASID_MASK);
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_mm(struct mm_struct *mm)
-{
- if (mm->context != 0)
- drop_mmu_context(mm);
-}
-
-void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- struct mm_struct *mm = vma->vm_mm;
- unsigned long vma_mm_context = mm->context;
- if (mm->context != 0) {
- unsigned long flags;
- int size;
-
- local_irq_save(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- if (size <= TLBSIZE) {
- int oldpid = pevn_get() & ASID_MASK;
- int newpid = vma_mm_context & ASID_MASK;
-
- start &= PAGE_MASK;
- end += (PAGE_SIZE - 1);
- end &= PAGE_MASK;
- while (start < end) {
- int idx;
-
- pevn_set(start | newpid);
- start += PAGE_SIZE;
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- pevn_set(KSEG1);
- if (idx < 0)
- continue;
- tlb_write_indexed();
- }
- pevn_set(oldpid);
- } else {
- /* Bigger than TLBSIZE, get new ASID directly */
- get_new_mmu_context(mm);
- if (mm == current->active_mm)
- pevn_set(vma_mm_context & ASID_MASK);
- }
- local_irq_restore(flags);
- }
-}
-
-void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- unsigned long flags;
- int size;
-
- local_irq_save(flags);
- size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
- if (size <= TLBSIZE) {
- int pid = pevn_get();
-
- start &= PAGE_MASK;
- end += PAGE_SIZE - 1;
- end &= PAGE_MASK;
-
- while (start < end) {
- long idx;
-
- pevn_set(start);
- start += PAGE_SIZE;
- tlb_probe();
- idx = tlbpt_get();
- if (idx < 0)
- continue;
- pectx_set(0);
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(pid);
- } else {
- local_flush_tlb_all();
- }
-
- local_irq_restore(flags);
-}
-
-void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
- if (vma && vma->vm_mm->context != 0) {
- unsigned long flags;
- int oldpid, newpid, idx;
- unsigned long vma_ASID = vma->vm_mm->context;
-
- newpid = vma_ASID & ASID_MASK;
- page &= PAGE_MASK;
- local_irq_save(flags);
- oldpid = pevn_get() & ASID_MASK;
- pevn_set(page | newpid);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- pevn_set(KSEG1);
- if (idx < 0) /* p_bit(31) - 1: miss, 0: hit*/
- goto finish;
- barrier();
- tlb_write_indexed();
-finish:
- pevn_set(oldpid);
- local_irq_restore(flags);
- }
-}
-
-/*
- * This one is only used for pages with the global bit set so we don't care
- * much about the ASID.
- */
-void local_flush_tlb_one(unsigned long page)
-{
- unsigned long flags;
- int oldpid, idx;
-
- local_irq_save(flags);
- oldpid = pevn_get();
- page &= (PAGE_MASK << 1);
- pevn_set(page);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(0);
- if (idx >= 0) {
- /* Make sure all entries differ. */
- pevn_set(KSEG1);
- barrier();
- tlb_write_indexed();
- }
- pevn_set(oldpid);
- local_irq_restore(flags);
-}
-
-void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
-{
- unsigned long flags;
- int idx, pid;
-
- /*
- * Handle debugger faulting in for debugee.
- */
- if (current->active_mm != vma->vm_mm)
- return;
-
- pid = pevn_get() & ASID_MASK;
-
- local_irq_save(flags);
- address &= PAGE_MASK;
- pevn_set(address | pid);
- barrier();
- tlb_probe();
- idx = tlbpt_get();
- pectx_set(pte_val(pte));
- pevn_set(address | pid);
- if (idx < 0)
- tlb_write_random();
- else
- tlb_write_indexed();
-
- pevn_set(pid);
- local_irq_restore(flags);
-}
-
-void tlb_init(void)
-{
- tlblock_set(0);
- local_flush_tlb_all();
- memcpy((void *)(EXCEPTION_VECTOR_BASE_ADDR + 0x100),
- &score7_FTLB_refill_Handler, 0xFC);
- flush_icache_range(EXCEPTION_VECTOR_BASE_ADDR + 0x100,
- EXCEPTION_VECTOR_BASE_ADDR + 0x1FC);
-}
generated by cgit (git 2.34.1) at 2024-06-08 02:15:58 +0000