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-rw-r--r--arch/m68k/mm/Makefile11
-rw-r--r--arch/m68k/mm/cache.c136
-rw-r--r--arch/m68k/mm/fault.c220
-rw-r--r--arch/m68k/mm/hwtest.c93
-rw-r--r--arch/m68k/mm/init.c180
-rw-r--r--arch/m68k/mm/kmap.c367
-rw-r--r--arch/m68k/mm/mcfmmu.c195
-rw-r--r--arch/m68k/mm/memory.c298
-rw-r--r--arch/m68k/mm/motorola.c308
-rw-r--r--arch/m68k/mm/sun3kmap.c161
-rw-r--r--arch/m68k/mm/sun3mmu.c98
11 files changed, 2067 insertions, 0 deletions
diff --git a/arch/m68k/mm/Makefile b/arch/m68k/mm/Makefile
new file mode 100644
index 000000000..cfbf32057
--- /dev/null
+++ b/arch/m68k/mm/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for the linux m68k-specific parts of the memory manager.
+#
+
+obj-y := init.o
+
+obj-$(CONFIG_MMU) += cache.o fault.o
+obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o hwtest.o
+obj-$(CONFIG_MMU_SUN3) += sun3kmap.o sun3mmu.o hwtest.o
+obj-$(CONFIG_MMU_COLDFIRE) += kmap.o memory.o mcfmmu.o
+
diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
new file mode 100644
index 000000000..3d84c1f2f
--- /dev/null
+++ b/arch/m68k/mm/cache.c
@@ -0,0 +1,136 @@
+/*
+ * linux/arch/m68k/mm/cache.c
+ *
+ * Instruction cache handling
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#include <linux/module.h>
+#include <asm/pgalloc.h>
+#include <asm/traps.h>
+
+
+static unsigned long virt_to_phys_slow(unsigned long vaddr)
+{
+ if (CPU_IS_060) {
+ unsigned long paddr;
+
+ /* The PLPAR instruction causes an access error if the translation
+ * is not possible. To catch this we use the same exception mechanism
+ * as for user space accesses in <asm/uaccess.h>. */
+ asm volatile (".chip 68060\n"
+ "1: plpar (%0)\n"
+ ".chip 68k\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ " .even\n"
+ "3: sub.l %0,%0\n"
+ " jra 2b\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ " .align 4\n"
+ " .long 1b,3b\n"
+ ".previous"
+ : "=a" (paddr)
+ : "0" (vaddr));
+ return paddr;
+ } else if (CPU_IS_040) {
+ unsigned long mmusr;
+
+ asm volatile (".chip 68040\n\t"
+ "ptestr (%1)\n\t"
+ "movec %%mmusr, %0\n\t"
+ ".chip 68k"
+ : "=r" (mmusr)
+ : "a" (vaddr));
+
+ if (mmusr & MMU_R_040)
+ return (mmusr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
+ } else {
+ unsigned short mmusr;
+ unsigned long *descaddr;
+
+ asm volatile ("ptestr %3,%2@,#7,%0\n\t"
+ "pmove %%psr,%1"
+ : "=a&" (descaddr), "=m" (mmusr)
+ : "a" (vaddr), "d" (get_fs().seg));
+ if (mmusr & (MMU_I|MMU_B|MMU_L))
+ return 0;
+ descaddr = phys_to_virt((unsigned long)descaddr);
+ switch (mmusr & MMU_NUM) {
+ case 1:
+ return (*descaddr & 0xfe000000) | (vaddr & 0x01ffffff);
+ case 2:
+ return (*descaddr & 0xfffc0000) | (vaddr & 0x0003ffff);
+ case 3:
+ return (*descaddr & PAGE_MASK) | (vaddr & ~PAGE_MASK);
+ }
+ }
+ return 0;
+}
+
+/* Push n pages at kernel virtual address and clear the icache */
+/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
+void flush_icache_range(unsigned long address, unsigned long endaddr)
+{
+ if (CPU_IS_COLDFIRE) {
+ unsigned long start, end;
+ start = address & ICACHE_SET_MASK;
+ end = endaddr & ICACHE_SET_MASK;
+ if (start > end) {
+ flush_cf_icache(0, end);
+ end = ICACHE_MAX_ADDR;
+ }
+ flush_cf_icache(start, end);
+ } else if (CPU_IS_040_OR_060) {
+ address &= PAGE_MASK;
+
+ do {
+ asm volatile ("nop\n\t"
+ ".chip 68040\n\t"
+ "cpushp %%bc,(%0)\n\t"
+ ".chip 68k"
+ : : "a" (virt_to_phys_slow(address)));
+ address += PAGE_SIZE;
+ } while (address < endaddr);
+ } else {
+ unsigned long tmp;
+ asm volatile ("movec %%cacr,%0\n\t"
+ "orw %1,%0\n\t"
+ "movec %0,%%cacr"
+ : "=&d" (tmp)
+ : "di" (FLUSH_I));
+ }
+}
+EXPORT_SYMBOL(flush_icache_range);
+
+void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
+ unsigned long addr, int len)
+{
+ if (CPU_IS_COLDFIRE) {
+ unsigned long start, end;
+ start = addr & ICACHE_SET_MASK;
+ end = (addr + len) & ICACHE_SET_MASK;
+ if (start > end) {
+ flush_cf_icache(0, end);
+ end = ICACHE_MAX_ADDR;
+ }
+ flush_cf_icache(start, end);
+
+ } else if (CPU_IS_040_OR_060) {
+ asm volatile ("nop\n\t"
+ ".chip 68040\n\t"
+ "cpushp %%bc,(%0)\n\t"
+ ".chip 68k"
+ : : "a" (page_to_phys(page)));
+ } else {
+ unsigned long tmp;
+ asm volatile ("movec %%cacr,%0\n\t"
+ "orw %1,%0\n\t"
+ "movec %0,%%cacr"
+ : "=&d" (tmp)
+ : "di" (FLUSH_I));
+ }
+}
+
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
new file mode 100644
index 000000000..b2f04aee4
--- /dev/null
+++ b/arch/m68k/mm/fault.c
@@ -0,0 +1,220 @@
+/*
+ * linux/arch/m68k/mm/fault.c
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+
+#include <asm/setup.h>
+#include <asm/traps.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+
+extern void die_if_kernel(char *, struct pt_regs *, long);
+
+int send_fault_sig(struct pt_regs *regs)
+{
+ siginfo_t siginfo = { 0, 0, 0, };
+
+ siginfo.si_signo = current->thread.signo;
+ siginfo.si_code = current->thread.code;
+ siginfo.si_addr = (void *)current->thread.faddr;
+ pr_debug("send_fault_sig: %p,%d,%d\n", siginfo.si_addr,
+ siginfo.si_signo, siginfo.si_code);
+
+ if (user_mode(regs)) {
+ force_sig_info(siginfo.si_signo,
+ &siginfo, current);
+ } else {
+ if (handle_kernel_fault(regs))
+ return -1;
+
+ //if (siginfo.si_signo == SIGBUS)
+ // force_sig_info(siginfo.si_signo,
+ // &siginfo, current);
+
+ /*
+ * Oops. The kernel tried to access some bad page. We'll have to
+ * terminate things with extreme prejudice.
+ */
+ if ((unsigned long)siginfo.si_addr < PAGE_SIZE)
+ pr_alert("Unable to handle kernel NULL pointer dereference");
+ else
+ pr_alert("Unable to handle kernel access");
+ pr_cont(" at virtual address %p\n", siginfo.si_addr);
+ die_if_kernel("Oops", regs, 0 /*error_code*/);
+ do_exit(SIGKILL);
+ }
+
+ return 1;
+}
+
+/*
+ * This routine handles page faults. It determines the problem, and
+ * then passes it off to one of the appropriate routines.
+ *
+ * error_code:
+ * bit 0 == 0 means no page found, 1 means protection fault
+ * bit 1 == 0 means read, 1 means write
+ *
+ * If this routine detects a bad access, it returns 1, otherwise it
+ * returns 0.
+ */
+int do_page_fault(struct pt_regs *regs, unsigned long address,
+ unsigned long error_code)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct * vma;
+ int fault;
+ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
+
+ pr_debug("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n",
+ regs->sr, regs->pc, address, error_code, mm ? mm->pgd : NULL);
+
+ /*
+ * If we're in an interrupt or have no user
+ * context, we must not take the fault..
+ */
+ if (in_atomic() || !mm)
+ goto no_context;
+
+ if (user_mode(regs))
+ flags |= FAULT_FLAG_USER;
+retry:
+ down_read(&mm->mmap_sem);
+
+ vma = find_vma(mm, address);
+ if (!vma)
+ goto map_err;
+ if (vma->vm_flags & VM_IO)
+ goto acc_err;
+ if (vma->vm_start <= address)
+ goto good_area;
+ if (!(vma->vm_flags & VM_GROWSDOWN))
+ goto map_err;
+ if (user_mode(regs)) {
+ /* Accessing the stack below usp is always a bug. The
+ "+ 256" is there due to some instructions doing
+ pre-decrement on the stack and that doesn't show up
+ until later. */
+ if (address + 256 < rdusp())
+ goto map_err;
+ }
+ if (expand_stack(vma, address))
+ goto map_err;
+
+/*
+ * Ok, we have a good vm_area for this memory access, so
+ * we can handle it..
+ */
+good_area:
+ pr_debug("do_page_fault: good_area\n");
+ switch (error_code & 3) {
+ default: /* 3: write, present */
+ /* fall through */
+ case 2: /* write, not present */
+ if (!(vma->vm_flags & VM_WRITE))
+ goto acc_err;
+ flags |= FAULT_FLAG_WRITE;
+ break;
+ case 1: /* read, present */
+ goto acc_err;
+ case 0: /* read, not present */
+ if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
+ goto acc_err;
+ }
+
+ /*
+ * 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, flags);
+ pr_debug("handle_mm_fault returns %d\n", fault);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return 0;
+
+ if (unlikely(fault & VM_FAULT_ERROR)) {
+ if (fault & VM_FAULT_OOM)
+ goto out_of_memory;
+ else if (fault & VM_FAULT_SIGSEGV)
+ goto map_err;
+ else if (fault & VM_FAULT_SIGBUS)
+ goto bus_err;
+ BUG();
+ }
+
+ /*
+ * Major/minor page fault accounting is only done on the
+ * initial attempt. If we go through a retry, it is extremely
+ * likely that the page will be found in page cache at that point.
+ */
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (fault & VM_FAULT_MAJOR)
+ current->maj_flt++;
+ else
+ current->min_flt++;
+ if (fault & VM_FAULT_RETRY) {
+ /* Clear FAULT_FLAG_ALLOW_RETRY to avoid any risk
+ * of starvation. */
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+ flags |= FAULT_FLAG_TRIED;
+
+ /*
+ * No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
+ }
+
+ up_read(&mm->mmap_sem);
+ return 0;
+
+/*
+ * 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 0;
+
+no_context:
+ current->thread.signo = SIGBUS;
+ current->thread.faddr = address;
+ return send_fault_sig(regs);
+
+bus_err:
+ current->thread.signo = SIGBUS;
+ current->thread.code = BUS_ADRERR;
+ current->thread.faddr = address;
+ goto send_sig;
+
+map_err:
+ current->thread.signo = SIGSEGV;
+ current->thread.code = SEGV_MAPERR;
+ current->thread.faddr = address;
+ goto send_sig;
+
+acc_err:
+ current->thread.signo = SIGSEGV;
+ current->thread.code = SEGV_ACCERR;
+ current->thread.faddr = address;
+
+send_sig:
+ up_read(&mm->mmap_sem);
+ return send_fault_sig(regs);
+}
diff --git a/arch/m68k/mm/hwtest.c b/arch/m68k/mm/hwtest.c
new file mode 100644
index 000000000..fb8be4dd3
--- /dev/null
+++ b/arch/m68k/mm/hwtest.c
@@ -0,0 +1,93 @@
+/* Tests for presence or absence of hardware registers.
+ * This code was originally in atari/config.c, but I noticed
+ * that it was also in drivers/nubus/nubus.c and I wanted to
+ * use it in hp300/config.c, so it seemed sensible to pull it
+ * out into its own file.
+ *
+ * The test is for use when trying to read a hardware register
+ * that isn't present would cause a bus error. We set up a
+ * temporary handler so that this doesn't kill the kernel.
+ *
+ * There is a test-by-reading and a test-by-writing; I present
+ * them here complete with the comments from the original atari
+ * config.c...
+ * -- PMM <pmaydell@chiark.greenend.org.uk>, 05/1998
+ */
+
+/* This function tests for the presence of an address, specially a
+ * hardware register address. It is called very early in the kernel
+ * initialization process, when the VBR register isn't set up yet. On
+ * an Atari, it still points to address 0, which is unmapped. So a bus
+ * error would cause another bus error while fetching the exception
+ * vector, and the CPU would do nothing at all. So we needed to set up
+ * a temporary VBR and a vector table for the duration of the test.
+ */
+
+#include <linux/module.h>
+
+int hwreg_present(volatile void *regp)
+{
+ int ret = 0;
+ unsigned long flags;
+ long save_sp, save_vbr;
+ long tmp_vectors[3];
+
+ local_irq_save(flags);
+ __asm__ __volatile__ (
+ "movec %/vbr,%2\n\t"
+ "movel #Lberr1,%4@(8)\n\t"
+ "movec %4,%/vbr\n\t"
+ "movel %/sp,%1\n\t"
+ "moveq #0,%0\n\t"
+ "tstb %3@\n\t"
+ "nop\n\t"
+ "moveq #1,%0\n"
+ "Lberr1:\n\t"
+ "movel %1,%/sp\n\t"
+ "movec %2,%/vbr"
+ : "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr)
+ : "a" (regp), "a" (tmp_vectors)
+ );
+ local_irq_restore(flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(hwreg_present);
+
+/* Basically the same, but writes a value into a word register, protected
+ * by a bus error handler. Returns 1 if successful, 0 otherwise.
+ */
+
+int hwreg_write(volatile void *regp, unsigned short val)
+{
+ int ret;
+ unsigned long flags;
+ long save_sp, save_vbr;
+ long tmp_vectors[3];
+
+ local_irq_save(flags);
+ __asm__ __volatile__ (
+ "movec %/vbr,%2\n\t"
+ "movel #Lberr2,%4@(8)\n\t"
+ "movec %4,%/vbr\n\t"
+ "movel %/sp,%1\n\t"
+ "moveq #0,%0\n\t"
+ "movew %5,%3@\n\t"
+ "nop\n\t"
+ /*
+ * If this nop isn't present, 'ret' may already be loaded
+ * with 1 at the time the bus error happens!
+ */
+ "moveq #1,%0\n"
+ "Lberr2:\n\t"
+ "movel %1,%/sp\n\t"
+ "movec %2,%/vbr"
+ : "=&d" (ret), "=&r" (save_sp), "=&r" (save_vbr)
+ : "a" (regp), "a" (tmp_vectors), "g" (val)
+ );
+ local_irq_restore(flags);
+
+ return ret;
+}
+EXPORT_SYMBOL(hwreg_write);
+
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
new file mode 100644
index 000000000..b09a3cb29
--- /dev/null
+++ b/arch/m68k/mm/init.c
@@ -0,0 +1,180 @@
+/*
+ * linux/arch/m68k/mm/init.c
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ *
+ * Contains common initialization routines, specific init code moved
+ * to motorola.c and sun3mmu.c
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+#ifdef CONFIG_ATARI
+#include <asm/atari_stram.h>
+#endif
+#include <asm/sections.h>
+#include <asm/tlb.h>
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+void *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
+
+#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
+extern void init_pointer_table(unsigned long ptable);
+extern pmd_t *zero_pgtable;
+#endif
+
+#ifdef CONFIG_MMU
+
+pg_data_t pg_data_map[MAX_NUMNODES];
+EXPORT_SYMBOL(pg_data_map);
+
+int m68k_virt_to_node_shift;
+
+#ifndef CONFIG_SINGLE_MEMORY_CHUNK
+pg_data_t *pg_data_table[65];
+EXPORT_SYMBOL(pg_data_table);
+#endif
+
+void __init m68k_setup_node(int node)
+{
+#ifndef CONFIG_SINGLE_MEMORY_CHUNK
+ struct m68k_mem_info *info = m68k_memory + node;
+ int i, end;
+
+ i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
+ end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
+ for (; i <= end; i++) {
+ if (pg_data_table[i])
+ printk("overlap at %u for chunk %u\n", i, node);
+ pg_data_table[i] = pg_data_map + node;
+ }
+#endif
+ pg_data_map[node].bdata = bootmem_node_data + node;
+ node_set_online(node);
+}
+
+#else /* CONFIG_MMU */
+
+/*
+ * paging_init() continues the virtual memory environment setup which
+ * was begun by the code in arch/head.S.
+ * The parameters are pointers to where to stick the starting and ending
+ * addresses of available kernel virtual memory.
+ */
+void __init paging_init(void)
+{
+ /*
+ * Make sure start_mem is page aligned, otherwise bootmem and
+ * page_alloc get different views of the world.
+ */
+ unsigned long end_mem = memory_end & PAGE_MASK;
+ unsigned long zones_size[MAX_NR_ZONES] = { 0, };
+
+ high_memory = (void *) end_mem;
+
+ empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+
+ /*
+ * Set up SFC/DFC registers (user data space).
+ */
+ set_fs (USER_DS);
+
+ zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
+ free_area_init(zones_size);
+}
+
+#endif /* CONFIG_MMU */
+
+void free_initmem(void)
+{
+#ifndef CONFIG_MMU_SUN3
+ free_initmem_default(-1);
+#endif /* CONFIG_MMU_SUN3 */
+}
+
+#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
+#define VECTORS &vectors[0]
+#else
+#define VECTORS _ramvec
+#endif
+
+void __init print_memmap(void)
+{
+#define UL(x) ((unsigned long) (x))
+#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
+#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
+#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
+
+ pr_notice("Virtual kernel memory layout:\n"
+ " vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
+ " kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
+ " vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
+ " lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
+ " .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
+ " .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
+ " .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
+ " .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
+ MLK(VECTORS, VECTORS + 256),
+ MLM(KMAP_START, KMAP_END),
+ MLM(VMALLOC_START, VMALLOC_END),
+ MLM(PAGE_OFFSET, (unsigned long)high_memory),
+ MLK_ROUNDUP(__init_begin, __init_end),
+ MLK_ROUNDUP(_stext, _etext),
+ MLK_ROUNDUP(_sdata, _edata),
+ MLK_ROUNDUP(__bss_start, __bss_stop));
+}
+
+static inline void init_pointer_tables(void)
+{
+#if defined(CONFIG_MMU) && !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
+ int i;
+
+ /* insert pointer tables allocated so far into the tablelist */
+ init_pointer_table((unsigned long)kernel_pg_dir);
+ for (i = 0; i < PTRS_PER_PGD; i++) {
+ if (pgd_present(kernel_pg_dir[i]))
+ init_pointer_table(__pgd_page(kernel_pg_dir[i]));
+ }
+
+ /* insert also pointer table that we used to unmap the zero page */
+ if (zero_pgtable)
+ init_pointer_table((unsigned long)zero_pgtable);
+#endif
+}
+
+void __init mem_init(void)
+{
+ /* this will put all memory onto the freelists */
+ free_all_bootmem();
+ init_pointer_tables();
+ mem_init_print_info(NULL);
+ print_memmap();
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+ free_reserved_area((void *)start, (void *)end, -1, "initrd");
+}
+#endif
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
new file mode 100644
index 000000000..6e4955bc5
--- /dev/null
+++ b/arch/m68k/mm/kmap.c
@@ -0,0 +1,367 @@
+/*
+ * linux/arch/m68k/mm/kmap.c
+ *
+ * Copyright (C) 1997 Roman Hodek
+ *
+ * 10/01/99 cleaned up the code and changing to the same interface
+ * used by other architectures /Roman Zippel
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/io.h>
+
+#undef DEBUG
+
+#define PTRTREESIZE (256*1024)
+
+/*
+ * For 040/060 we can use the virtual memory area like other architectures,
+ * but for 020/030 we want to use early termination page descriptors and we
+ * can't mix this with normal page descriptors, so we have to copy that code
+ * (mm/vmalloc.c) and return appropriately aligned addresses.
+ */
+
+#ifdef CPU_M68040_OR_M68060_ONLY
+
+#define IO_SIZE PAGE_SIZE
+
+static inline struct vm_struct *get_io_area(unsigned long size)
+{
+ return get_vm_area(size, VM_IOREMAP);
+}
+
+
+static inline void free_io_area(void *addr)
+{
+ vfree((void *)(PAGE_MASK & (unsigned long)addr));
+}
+
+#else
+
+#define IO_SIZE (256*1024)
+
+static struct vm_struct *iolist;
+
+static struct vm_struct *get_io_area(unsigned long size)
+{
+ unsigned long addr;
+ struct vm_struct **p, *tmp, *area;
+
+ area = kmalloc(sizeof(*area), GFP_KERNEL);
+ if (!area)
+ return NULL;
+ addr = KMAP_START;
+ for (p = &iolist; (tmp = *p) ; p = &tmp->next) {
+ if (size + addr < (unsigned long)tmp->addr)
+ break;
+ if (addr > KMAP_END-size) {
+ kfree(area);
+ return NULL;
+ }
+ addr = tmp->size + (unsigned long)tmp->addr;
+ }
+ area->addr = (void *)addr;
+ area->size = size + IO_SIZE;
+ area->next = *p;
+ *p = area;
+ return area;
+}
+
+static inline void free_io_area(void *addr)
+{
+ struct vm_struct **p, *tmp;
+
+ if (!addr)
+ return;
+ addr = (void *)((unsigned long)addr & -IO_SIZE);
+ for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {
+ if (tmp->addr == addr) {
+ *p = tmp->next;
+ __iounmap(tmp->addr, tmp->size);
+ kfree(tmp);
+ return;
+ }
+ }
+}
+
+#endif
+
+/*
+ * Map some physical address range into the kernel address space.
+ */
+/* Rewritten by Andreas Schwab to remove all races. */
+
+void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
+{
+ struct vm_struct *area;
+ unsigned long virtaddr, retaddr;
+ long offset;
+ pgd_t *pgd_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ /*
+ * Don't allow mappings that wrap..
+ */
+ if (!size || physaddr > (unsigned long)(-size))
+ return NULL;
+
+#ifdef CONFIG_AMIGA
+ if (MACH_IS_AMIGA) {
+ if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)
+ && (cacheflag == IOMAP_NOCACHE_SER))
+ return (void __iomem *)physaddr;
+ }
+#endif
+
+#ifdef DEBUG
+ printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
+#endif
+ /*
+ * Mappings have to be aligned
+ */
+ offset = physaddr & (IO_SIZE - 1);
+ physaddr &= -IO_SIZE;
+ size = (size + offset + IO_SIZE - 1) & -IO_SIZE;
+
+ /*
+ * Ok, go for it..
+ */
+ area = get_io_area(size);
+ if (!area)
+ return NULL;
+
+ virtaddr = (unsigned long)area->addr;
+ retaddr = virtaddr + offset;
+#ifdef DEBUG
+ printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
+#endif
+
+ /*
+ * add cache and table flags to physical address
+ */
+ if (CPU_IS_040_OR_060) {
+ physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 |
+ _PAGE_ACCESSED | _PAGE_DIRTY);
+ switch (cacheflag) {
+ case IOMAP_FULL_CACHING:
+ physaddr |= _PAGE_CACHE040;
+ break;
+ case IOMAP_NOCACHE_SER:
+ default:
+ physaddr |= _PAGE_NOCACHE_S;
+ break;
+ case IOMAP_NOCACHE_NONSER:
+ physaddr |= _PAGE_NOCACHE;
+ break;
+ case IOMAP_WRITETHROUGH:
+ physaddr |= _PAGE_CACHE040W;
+ break;
+ }
+ } else {
+ physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED |
+ _PAGE_DIRTY | _PAGE_READWRITE);
+ switch (cacheflag) {
+ case IOMAP_NOCACHE_SER:
+ case IOMAP_NOCACHE_NONSER:
+ default:
+ physaddr |= _PAGE_NOCACHE030;
+ break;
+ case IOMAP_FULL_CACHING:
+ case IOMAP_WRITETHROUGH:
+ break;
+ }
+ }
+
+ while ((long)size > 0) {
+#ifdef DEBUG
+ if (!(virtaddr & (PTRTREESIZE-1)))
+ printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
+#endif
+ pgd_dir = pgd_offset_k(virtaddr);
+ pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr);
+ if (!pmd_dir) {
+ printk("ioremap: no mem for pmd_dir\n");
+ return NULL;
+ }
+
+ if (CPU_IS_020_OR_030) {
+ pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
+ physaddr += PTRTREESIZE;
+ virtaddr += PTRTREESIZE;
+ size -= PTRTREESIZE;
+ } else {
+ pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
+ if (!pte_dir) {
+ printk("ioremap: no mem for pte_dir\n");
+ return NULL;
+ }
+
+ pte_val(*pte_dir) = physaddr;
+ virtaddr += PAGE_SIZE;
+ physaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+ }
+#ifdef DEBUG
+ printk("\n");
+#endif
+ flush_tlb_all();
+
+ return (void __iomem *)retaddr;
+}
+EXPORT_SYMBOL(__ioremap);
+
+/*
+ * Unmap an ioremap()ed region again
+ */
+void iounmap(void __iomem *addr)
+{
+#ifdef CONFIG_AMIGA
+ if ((!MACH_IS_AMIGA) ||
+ (((unsigned long)addr < 0x40000000) ||
+ ((unsigned long)addr > 0x60000000)))
+ free_io_area((__force void *)addr);
+#else
+ free_io_area((__force void *)addr);
+#endif
+}
+EXPORT_SYMBOL(iounmap);
+
+/*
+ * __iounmap unmaps nearly everything, so be careful
+ * Currently it doesn't free pointer/page tables anymore but this
+ * wasn't used anyway and might be added later.
+ */
+void __iounmap(void *addr, unsigned long size)
+{
+ unsigned long virtaddr = (unsigned long)addr;
+ pgd_t *pgd_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ while ((long)size > 0) {
+ pgd_dir = pgd_offset_k(virtaddr);
+ if (pgd_bad(*pgd_dir)) {
+ printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
+ pgd_clear(pgd_dir);
+ return;
+ }
+ pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+ if (CPU_IS_020_OR_030) {
+ int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+ int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
+
+ if (pmd_type == _PAGE_PRESENT) {
+ pmd_dir->pmd[pmd_off] = 0;
+ virtaddr += PTRTREESIZE;
+ size -= PTRTREESIZE;
+ continue;
+ } else if (pmd_type == 0)
+ continue;
+ }
+
+ if (pmd_bad(*pmd_dir)) {
+ printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+ pmd_clear(pmd_dir);
+ return;
+ }
+ pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+ pte_val(*pte_dir) = 0;
+ virtaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ flush_tlb_all();
+}
+
+/*
+ * Set new cache mode for some kernel address space.
+ * The caller must push data for that range itself, if such data may already
+ * be in the cache.
+ */
+void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
+{
+ unsigned long virtaddr = (unsigned long)addr;
+ pgd_t *pgd_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ if (CPU_IS_040_OR_060) {
+ switch (cmode) {
+ case IOMAP_FULL_CACHING:
+ cmode = _PAGE_CACHE040;
+ break;
+ case IOMAP_NOCACHE_SER:
+ default:
+ cmode = _PAGE_NOCACHE_S;
+ break;
+ case IOMAP_NOCACHE_NONSER:
+ cmode = _PAGE_NOCACHE;
+ break;
+ case IOMAP_WRITETHROUGH:
+ cmode = _PAGE_CACHE040W;
+ break;
+ }
+ } else {
+ switch (cmode) {
+ case IOMAP_NOCACHE_SER:
+ case IOMAP_NOCACHE_NONSER:
+ default:
+ cmode = _PAGE_NOCACHE030;
+ break;
+ case IOMAP_FULL_CACHING:
+ case IOMAP_WRITETHROUGH:
+ cmode = 0;
+ }
+ }
+
+ while ((long)size > 0) {
+ pgd_dir = pgd_offset_k(virtaddr);
+ if (pgd_bad(*pgd_dir)) {
+ printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
+ pgd_clear(pgd_dir);
+ return;
+ }
+ pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+ if (CPU_IS_020_OR_030) {
+ int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+
+ if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
+ pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &
+ _CACHEMASK040) | cmode;
+ virtaddr += PTRTREESIZE;
+ size -= PTRTREESIZE;
+ continue;
+ }
+ }
+
+ if (pmd_bad(*pmd_dir)) {
+ printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+ pmd_clear(pmd_dir);
+ return;
+ }
+ pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+ pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode;
+ virtaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ flush_tlb_all();
+}
+EXPORT_SYMBOL(kernel_set_cachemode);
diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
new file mode 100644
index 000000000..f58fafe7e
--- /dev/null
+++ b/arch/m68k/mm/mcfmmu.c
@@ -0,0 +1,195 @@
+/*
+ * Based upon linux/arch/m68k/mm/sun3mmu.c
+ * Based upon linux/arch/ppc/mm/mmu_context.c
+ *
+ * Implementations of mm routines specific to the Coldfire MMU.
+ *
+ * Copyright (c) 2008 Freescale Semiconductor, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/bootmem.h>
+
+#include <asm/setup.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/mmu_context.h>
+#include <asm/mcf_pgalloc.h>
+#include <asm/tlbflush.h>
+
+#define KMAPAREA(x) ((x >= VMALLOC_START) && (x < KMAP_END))
+
+mm_context_t next_mmu_context;
+unsigned long context_map[LAST_CONTEXT / BITS_PER_LONG + 1];
+atomic_t nr_free_contexts;
+struct mm_struct *context_mm[LAST_CONTEXT+1];
+extern unsigned long num_pages;
+
+/*
+ * ColdFire paging_init derived from sun3.
+ */
+void __init paging_init(void)
+{
+ pgd_t *pg_dir;
+ pte_t *pg_table;
+ unsigned long address, size;
+ unsigned long next_pgtable, bootmem_end;
+ unsigned long zones_size[MAX_NR_ZONES];
+ enum zone_type zone;
+ int i;
+
+ empty_zero_page = (void *) alloc_bootmem_pages(PAGE_SIZE);
+ memset((void *) empty_zero_page, 0, PAGE_SIZE);
+
+ pg_dir = swapper_pg_dir;
+ memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir));
+
+ size = num_pages * sizeof(pte_t);
+ size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
+ next_pgtable = (unsigned long) alloc_bootmem_pages(size);
+
+ bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;
+ pg_dir += PAGE_OFFSET >> PGDIR_SHIFT;
+
+ address = PAGE_OFFSET;
+ while (address < (unsigned long)high_memory) {
+ pg_table = (pte_t *) next_pgtable;
+ next_pgtable += PTRS_PER_PTE * sizeof(pte_t);
+ pgd_val(*pg_dir) = (unsigned long) pg_table;
+ pg_dir++;
+
+ /* now change pg_table to kernel virtual addresses */
+ for (i = 0; i < PTRS_PER_PTE; ++i, ++pg_table) {
+ pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
+ if (address >= (unsigned long) high_memory)
+ pte_val(pte) = 0;
+
+ set_pte(pg_table, pte);
+ address += PAGE_SIZE;
+ }
+ }
+
+ current->mm = NULL;
+
+ for (zone = 0; zone < MAX_NR_ZONES; zone++)
+ zones_size[zone] = 0x0;
+ zones_size[ZONE_DMA] = num_pages;
+ free_area_init(zones_size);
+}
+
+int cf_tlb_miss(struct pt_regs *regs, int write, int dtlb, int extension_word)
+{
+ unsigned long flags, mmuar, mmutr;
+ struct mm_struct *mm;
+ pgd_t *pgd;
+ pmd_t *pmd;
+ pte_t *pte;
+ int asid;
+
+ local_irq_save(flags);
+
+ mmuar = (dtlb) ? mmu_read(MMUAR) :
+ regs->pc + (extension_word * sizeof(long));
+
+ mm = (!user_mode(regs) && KMAPAREA(mmuar)) ? &init_mm : current->mm;
+ if (!mm) {
+ local_irq_restore(flags);
+ return -1;
+ }
+
+ pgd = pgd_offset(mm, mmuar);
+ if (pgd_none(*pgd)) {
+ local_irq_restore(flags);
+ return -1;
+ }
+
+ pmd = pmd_offset(pgd, mmuar);
+ if (pmd_none(*pmd)) {
+ local_irq_restore(flags);
+ return -1;
+ }
+
+ pte = (KMAPAREA(mmuar)) ? pte_offset_kernel(pmd, mmuar)
+ : pte_offset_map(pmd, mmuar);
+ if (pte_none(*pte) || !pte_present(*pte)) {
+ local_irq_restore(flags);
+ return -1;
+ }
+
+ if (write) {
+ if (!pte_write(*pte)) {
+ local_irq_restore(flags);
+ return -1;
+ }
+ set_pte(pte, pte_mkdirty(*pte));
+ }
+
+ set_pte(pte, pte_mkyoung(*pte));
+ asid = mm->context & 0xff;
+ if (!pte_dirty(*pte) && !KMAPAREA(mmuar))
+ set_pte(pte, pte_wrprotect(*pte));
+
+ mmutr = (mmuar & PAGE_MASK) | (asid << MMUTR_IDN) | MMUTR_V;
+ if ((mmuar < TASK_UNMAPPED_BASE) || (mmuar >= TASK_SIZE))
+ mmutr |= (pte->pte & CF_PAGE_MMUTR_MASK) >> CF_PAGE_MMUTR_SHIFT;
+ mmu_write(MMUTR, mmutr);
+
+ mmu_write(MMUDR, (pte_val(*pte) & PAGE_MASK) |
+ ((pte->pte) & CF_PAGE_MMUDR_MASK) | MMUDR_SZ_8KB | MMUDR_X);
+
+ if (dtlb)
+ mmu_write(MMUOR, MMUOR_ACC | MMUOR_UAA);
+ else
+ mmu_write(MMUOR, MMUOR_ITLB | MMUOR_ACC | MMUOR_UAA);
+
+ local_irq_restore(flags);
+ return 0;
+}
+
+/*
+ * Initialize the context management stuff.
+ * The following was taken from arch/ppc/mmu_context.c
+ */
+void __init mmu_context_init(void)
+{
+ /*
+ * Some processors have too few contexts to reserve one for
+ * init_mm, and require using context 0 for a normal task.
+ * Other processors reserve the use of context zero for the kernel.
+ * This code assumes FIRST_CONTEXT < 32.
+ */
+ context_map[0] = (1 << FIRST_CONTEXT) - 1;
+ next_mmu_context = FIRST_CONTEXT;
+ atomic_set(&nr_free_contexts, LAST_CONTEXT - FIRST_CONTEXT + 1);
+}
+
+/*
+ * Steal a context from a task that has one at the moment.
+ * This is only used on 8xx and 4xx and we presently assume that
+ * they don't do SMP. If they do then thicfpgalloc.hs will have to check
+ * whether the MM we steal is in use.
+ * We also assume that this is only used on systems that don't
+ * use an MMU hash table - this is true for 8xx and 4xx.
+ * This isn't an LRU system, it just frees up each context in
+ * turn (sort-of pseudo-random replacement :). This would be the
+ * place to implement an LRU scheme if anyone was motivated to do it.
+ * -- paulus
+ */
+void steal_context(void)
+{
+ struct mm_struct *mm;
+ /*
+ * free up context `next_mmu_context'
+ * if we shouldn't free context 0, don't...
+ */
+ if (next_mmu_context < FIRST_CONTEXT)
+ next_mmu_context = FIRST_CONTEXT;
+ mm = context_mm[next_mmu_context];
+ flush_tlb_mm(mm);
+ destroy_context(mm);
+}
+
diff --git a/arch/m68k/mm/memory.c b/arch/m68k/mm/memory.c
new file mode 100644
index 000000000..51bc9d258
--- /dev/null
+++ b/arch/m68k/mm/memory.c
@@ -0,0 +1,298 @@
+/*
+ * linux/arch/m68k/mm/memory.c
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/pagemap.h>
+#include <linux/gfp.h>
+
+#include <asm/setup.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+
+
+/* ++andreas: {get,free}_pointer_table rewritten to use unused fields from
+ struct page instead of separately kmalloced struct. Stolen from
+ arch/sparc/mm/srmmu.c ... */
+
+typedef struct list_head ptable_desc;
+static LIST_HEAD(ptable_list);
+
+#define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page(page)->lru))
+#define PD_PAGE(ptable) (list_entry(ptable, struct page, lru))
+#define PD_MARKBITS(dp) (*(unsigned char *)&PD_PAGE(dp)->index)
+
+#define PTABLE_SIZE (PTRS_PER_PMD * sizeof(pmd_t))
+
+void __init init_pointer_table(unsigned long ptable)
+{
+ ptable_desc *dp;
+ unsigned long page = ptable & PAGE_MASK;
+ unsigned char mask = 1 << ((ptable - page)/PTABLE_SIZE);
+
+ dp = PD_PTABLE(page);
+ if (!(PD_MARKBITS(dp) & mask)) {
+ PD_MARKBITS(dp) = 0xff;
+ list_add(dp, &ptable_list);
+ }
+
+ PD_MARKBITS(dp) &= ~mask;
+#ifdef DEBUG
+ printk("init_pointer_table: %lx, %x\n", ptable, PD_MARKBITS(dp));
+#endif
+
+ /* unreserve the page so it's possible to free that page */
+ PD_PAGE(dp)->flags &= ~(1 << PG_reserved);
+ init_page_count(PD_PAGE(dp));
+
+ return;
+}
+
+pmd_t *get_pointer_table (void)
+{
+ ptable_desc *dp = ptable_list.next;
+ unsigned char mask = PD_MARKBITS (dp);
+ unsigned char tmp;
+ unsigned int off;
+
+ /*
+ * For a pointer table for a user process address space, a
+ * table is taken from a page allocated for the purpose. Each
+ * page can hold 8 pointer tables. The page is remapped in
+ * virtual address space to be noncacheable.
+ */
+ if (mask == 0) {
+ void *page;
+ ptable_desc *new;
+
+ if (!(page = (void *)get_zeroed_page(GFP_KERNEL)))
+ return NULL;
+
+ flush_tlb_kernel_page(page);
+ nocache_page(page);
+
+ new = PD_PTABLE(page);
+ PD_MARKBITS(new) = 0xfe;
+ list_add_tail(new, dp);
+
+ return (pmd_t *)page;
+ }
+
+ for (tmp = 1, off = 0; (mask & tmp) == 0; tmp <<= 1, off += PTABLE_SIZE)
+ ;
+ PD_MARKBITS(dp) = mask & ~tmp;
+ if (!PD_MARKBITS(dp)) {
+ /* move to end of list */
+ list_move_tail(dp, &ptable_list);
+ }
+ return (pmd_t *) (page_address(PD_PAGE(dp)) + off);
+}
+
+int free_pointer_table (pmd_t *ptable)
+{
+ ptable_desc *dp;
+ unsigned long page = (unsigned long)ptable & PAGE_MASK;
+ unsigned char mask = 1 << (((unsigned long)ptable - page)/PTABLE_SIZE);
+
+ dp = PD_PTABLE(page);
+ if (PD_MARKBITS (dp) & mask)
+ panic ("table already free!");
+
+ PD_MARKBITS (dp) |= mask;
+
+ if (PD_MARKBITS(dp) == 0xff) {
+ /* all tables in page are free, free page */
+ list_del(dp);
+ cache_page((void *)page);
+ free_page (page);
+ return 1;
+ } else if (ptable_list.next != dp) {
+ /*
+ * move this descriptor to the front of the list, since
+ * it has one or more free tables.
+ */
+ list_move(dp, &ptable_list);
+ }
+ return 0;
+}
+
+/* invalidate page in both caches */
+static inline void clear040(unsigned long paddr)
+{
+ asm volatile (
+ "nop\n\t"
+ ".chip 68040\n\t"
+ "cinvp %%bc,(%0)\n\t"
+ ".chip 68k"
+ : : "a" (paddr));
+}
+
+/* invalidate page in i-cache */
+static inline void cleari040(unsigned long paddr)
+{
+ asm volatile (
+ "nop\n\t"
+ ".chip 68040\n\t"
+ "cinvp %%ic,(%0)\n\t"
+ ".chip 68k"
+ : : "a" (paddr));
+}
+
+/* push page in both caches */
+/* RZ: cpush %bc DOES invalidate %ic, regardless of DPI */
+static inline void push040(unsigned long paddr)
+{
+ asm volatile (
+ "nop\n\t"
+ ".chip 68040\n\t"
+ "cpushp %%bc,(%0)\n\t"
+ ".chip 68k"
+ : : "a" (paddr));
+}
+
+/* push and invalidate page in both caches, must disable ints
+ * to avoid invalidating valid data */
+static inline void pushcl040(unsigned long paddr)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ push040(paddr);
+ if (CPU_IS_060)
+ clear040(paddr);
+ local_irq_restore(flags);
+}
+
+/*
+ * 040: Hit every page containing an address in the range paddr..paddr+len-1.
+ * (Low order bits of the ea of a CINVP/CPUSHP are "don't care"s).
+ * Hit every page until there is a page or less to go. Hit the next page,
+ * and the one after that if the range hits it.
+ */
+/* ++roman: A little bit more care is required here: The CINVP instruction
+ * invalidates cache entries WITHOUT WRITING DIRTY DATA BACK! So the beginning
+ * and the end of the region must be treated differently if they are not
+ * exactly at the beginning or end of a page boundary. Else, maybe too much
+ * data becomes invalidated and thus lost forever. CPUSHP does what we need:
+ * it invalidates the page after pushing dirty data to memory. (Thanks to Jes
+ * for discovering the problem!)
+ */
+/* ... but on the '060, CPUSH doesn't invalidate (for us, since we have set
+ * the DPI bit in the CACR; would it cause problems with temporarily changing
+ * this?). So we have to push first and then additionally to invalidate.
+ */
+
+
+/*
+ * cache_clear() semantics: Clear any cache entries for the area in question,
+ * without writing back dirty entries first. This is useful if the data will
+ * be overwritten anyway, e.g. by DMA to memory. The range is defined by a
+ * _physical_ address.
+ */
+
+void cache_clear (unsigned long paddr, int len)
+{
+ if (CPU_IS_COLDFIRE) {
+ clear_cf_bcache(0, DCACHE_MAX_ADDR);
+ } else if (CPU_IS_040_OR_060) {
+ int tmp;
+
+ /*
+ * We need special treatment for the first page, in case it
+ * is not page-aligned. Page align the addresses to work
+ * around bug I17 in the 68060.
+ */
+ if ((tmp = -paddr & (PAGE_SIZE - 1))) {
+ pushcl040(paddr & PAGE_MASK);
+ if ((len -= tmp) <= 0)
+ return;
+ paddr += tmp;
+ }
+ tmp = PAGE_SIZE;
+ paddr &= PAGE_MASK;
+ while ((len -= tmp) >= 0) {
+ clear040(paddr);
+ paddr += tmp;
+ }
+ if ((len += tmp))
+ /* a page boundary gets crossed at the end */
+ pushcl040(paddr);
+ }
+ else /* 68030 or 68020 */
+ asm volatile ("movec %/cacr,%/d0\n\t"
+ "oriw %0,%/d0\n\t"
+ "movec %/d0,%/cacr"
+ : : "i" (FLUSH_I_AND_D)
+ : "d0");
+#ifdef CONFIG_M68K_L2_CACHE
+ if(mach_l2_flush)
+ mach_l2_flush(0);
+#endif
+}
+EXPORT_SYMBOL(cache_clear);
+
+
+/*
+ * cache_push() semantics: Write back any dirty cache data in the given area,
+ * and invalidate the range in the instruction cache. It needs not (but may)
+ * invalidate those entries also in the data cache. The range is defined by a
+ * _physical_ address.
+ */
+
+void cache_push (unsigned long paddr, int len)
+{
+ if (CPU_IS_COLDFIRE) {
+ flush_cf_bcache(0, DCACHE_MAX_ADDR);
+ } else if (CPU_IS_040_OR_060) {
+ int tmp = PAGE_SIZE;
+
+ /*
+ * on 68040 or 68060, push cache lines for pages in the range;
+ * on the '040 this also invalidates the pushed lines, but not on
+ * the '060!
+ */
+ len += paddr & (PAGE_SIZE - 1);
+
+ /*
+ * Work around bug I17 in the 68060 affecting some instruction
+ * lines not being invalidated properly.
+ */
+ paddr &= PAGE_MASK;
+
+ do {
+ push040(paddr);
+ paddr += tmp;
+ } while ((len -= tmp) > 0);
+ }
+ /*
+ * 68030/68020 have no writeback cache. On the other hand,
+ * cache_push is actually a superset of cache_clear (the lines
+ * get written back and invalidated), so we should make sure
+ * to perform the corresponding actions. After all, this is getting
+ * called in places where we've just loaded code, or whatever, so
+ * flushing the icache is appropriate; flushing the dcache shouldn't
+ * be required.
+ */
+ else /* 68030 or 68020 */
+ asm volatile ("movec %/cacr,%/d0\n\t"
+ "oriw %0,%/d0\n\t"
+ "movec %/d0,%/cacr"
+ : : "i" (FLUSH_I)
+ : "d0");
+#ifdef CONFIG_M68K_L2_CACHE
+ if(mach_l2_flush)
+ mach_l2_flush(1);
+#endif
+}
+EXPORT_SYMBOL(cache_push);
+
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
new file mode 100644
index 000000000..b958916e5
--- /dev/null
+++ b/arch/m68k/mm/motorola.c
@@ -0,0 +1,308 @@
+/*
+ * linux/arch/m68k/mm/motorola.c
+ *
+ * Routines specific to the Motorola MMU, originally from:
+ * linux/arch/m68k/init.c
+ * which are Copyright (C) 1995 Hamish Macdonald
+ *
+ * Moved 8/20/1999 Sam Creasey
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#ifdef CONFIG_ATARI
+#include <asm/atari_stram.h>
+#endif
+#include <asm/sections.h>
+
+#undef DEBUG
+
+#ifndef mm_cachebits
+/*
+ * Bits to add to page descriptors for "normal" caching mode.
+ * For 68020/030 this is 0.
+ * For 68040, this is _PAGE_CACHE040 (cachable, copyback)
+ */
+unsigned long mm_cachebits;
+EXPORT_SYMBOL(mm_cachebits);
+#endif
+
+/* size of memory already mapped in head.S */
+extern __initdata unsigned long m68k_init_mapped_size;
+
+extern unsigned long availmem;
+
+static pte_t * __init kernel_page_table(void)
+{
+ pte_t *ptablep;
+
+ ptablep = (pte_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+
+ clear_page(ptablep);
+ __flush_page_to_ram(ptablep);
+ flush_tlb_kernel_page(ptablep);
+ nocache_page(ptablep);
+
+ return ptablep;
+}
+
+static pmd_t *last_pgtable __initdata = NULL;
+pmd_t *zero_pgtable __initdata = NULL;
+
+static pmd_t * __init kernel_ptr_table(void)
+{
+ if (!last_pgtable) {
+ unsigned long pmd, last;
+ int i;
+
+ /* Find the last ptr table that was used in head.S and
+ * reuse the remaining space in that page for further
+ * ptr tables.
+ */
+ last = (unsigned long)kernel_pg_dir;
+ for (i = 0; i < PTRS_PER_PGD; i++) {
+ if (!pgd_present(kernel_pg_dir[i]))
+ continue;
+ pmd = __pgd_page(kernel_pg_dir[i]);
+ if (pmd > last)
+ last = pmd;
+ }
+
+ last_pgtable = (pmd_t *)last;
+#ifdef DEBUG
+ printk("kernel_ptr_init: %p\n", last_pgtable);
+#endif
+ }
+
+ last_pgtable += PTRS_PER_PMD;
+ if (((unsigned long)last_pgtable & ~PAGE_MASK) == 0) {
+ last_pgtable = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
+
+ clear_page(last_pgtable);
+ __flush_page_to_ram(last_pgtable);
+ flush_tlb_kernel_page(last_pgtable);
+ nocache_page(last_pgtable);
+ }
+
+ return last_pgtable;
+}
+
+static void __init map_node(int node)
+{
+#define PTRTREESIZE (256*1024)
+#define ROOTTREESIZE (32*1024*1024)
+ unsigned long physaddr, virtaddr, size;
+ pgd_t *pgd_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ size = m68k_memory[node].size;
+ physaddr = m68k_memory[node].addr;
+ virtaddr = (unsigned long)phys_to_virt(physaddr);
+ physaddr |= m68k_supervisor_cachemode |
+ _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY;
+ if (CPU_IS_040_OR_060)
+ physaddr |= _PAGE_GLOBAL040;
+
+ while (size > 0) {
+#ifdef DEBUG
+ if (!(virtaddr & (PTRTREESIZE-1)))
+ printk ("\npa=%#lx va=%#lx ", physaddr & PAGE_MASK,
+ virtaddr);
+#endif
+ pgd_dir = pgd_offset_k(virtaddr);
+ if (virtaddr && CPU_IS_020_OR_030) {
+ if (!(virtaddr & (ROOTTREESIZE-1)) &&
+ size >= ROOTTREESIZE) {
+#ifdef DEBUG
+ printk ("[very early term]");
+#endif
+ pgd_val(*pgd_dir) = physaddr;
+ size -= ROOTTREESIZE;
+ virtaddr += ROOTTREESIZE;
+ physaddr += ROOTTREESIZE;
+ continue;
+ }
+ }
+ if (!pgd_present(*pgd_dir)) {
+ pmd_dir = kernel_ptr_table();
+#ifdef DEBUG
+ printk ("[new pointer %p]", pmd_dir);
+#endif
+ pgd_set(pgd_dir, pmd_dir);
+ } else
+ pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+ if (CPU_IS_020_OR_030) {
+ if (virtaddr) {
+#ifdef DEBUG
+ printk ("[early term]");
+#endif
+ pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
+ physaddr += PTRTREESIZE;
+ } else {
+ int i;
+#ifdef DEBUG
+ printk ("[zero map]");
+#endif
+ zero_pgtable = kernel_ptr_table();
+ pte_dir = (pte_t *)zero_pgtable;
+ pmd_dir->pmd[0] = virt_to_phys(pte_dir) |
+ _PAGE_TABLE | _PAGE_ACCESSED;
+ pte_val(*pte_dir++) = 0;
+ physaddr += PAGE_SIZE;
+ for (i = 1; i < 64; physaddr += PAGE_SIZE, i++)
+ pte_val(*pte_dir++) = physaddr;
+ }
+ size -= PTRTREESIZE;
+ virtaddr += PTRTREESIZE;
+ } else {
+ if (!pmd_present(*pmd_dir)) {
+#ifdef DEBUG
+ printk ("[new table]");
+#endif
+ pte_dir = kernel_page_table();
+ pmd_set(pmd_dir, pte_dir);
+ }
+ pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+ if (virtaddr) {
+ if (!pte_present(*pte_dir))
+ pte_val(*pte_dir) = physaddr;
+ } else
+ pte_val(*pte_dir) = 0;
+ size -= PAGE_SIZE;
+ virtaddr += PAGE_SIZE;
+ physaddr += PAGE_SIZE;
+ }
+
+ }
+#ifdef DEBUG
+ printk("\n");
+#endif
+}
+
+/*
+ * paging_init() continues the virtual memory environment setup which
+ * was begun by the code in arch/head.S.
+ */
+void __init paging_init(void)
+{
+ unsigned long zones_size[MAX_NR_ZONES] = { 0, };
+ unsigned long min_addr, max_addr;
+ unsigned long addr, size, end;
+ int i;
+
+#ifdef DEBUG
+ printk ("start of paging_init (%p, %lx)\n", kernel_pg_dir, availmem);
+#endif
+
+ /* Fix the cache mode in the page descriptors for the 680[46]0. */
+ if (CPU_IS_040_OR_060) {
+ int i;
+#ifndef mm_cachebits
+ mm_cachebits = _PAGE_CACHE040;
+#endif
+ for (i = 0; i < 16; i++)
+ pgprot_val(protection_map[i]) |= _PAGE_CACHE040;
+ }
+
+ min_addr = m68k_memory[0].addr;
+ max_addr = min_addr + m68k_memory[0].size;
+ for (i = 1; i < m68k_num_memory;) {
+ if (m68k_memory[i].addr < min_addr) {
+ printk("Ignoring memory chunk at 0x%lx:0x%lx before the first chunk\n",
+ m68k_memory[i].addr, m68k_memory[i].size);
+ printk("Fix your bootloader or use a memfile to make use of this area!\n");
+ m68k_num_memory--;
+ memmove(m68k_memory + i, m68k_memory + i + 1,
+ (m68k_num_memory - i) * sizeof(struct m68k_mem_info));
+ continue;
+ }
+ addr = m68k_memory[i].addr + m68k_memory[i].size;
+ if (addr > max_addr)
+ max_addr = addr;
+ i++;
+ }
+ m68k_memoffset = min_addr - PAGE_OFFSET;
+ m68k_virt_to_node_shift = fls(max_addr - min_addr - 1) - 6;
+
+ module_fixup(NULL, __start_fixup, __stop_fixup);
+ flush_icache();
+
+ high_memory = phys_to_virt(max_addr);
+
+ min_low_pfn = availmem >> PAGE_SHIFT;
+ max_low_pfn = max_addr >> PAGE_SHIFT;
+
+ for (i = 0; i < m68k_num_memory; i++) {
+ addr = m68k_memory[i].addr;
+ end = addr + m68k_memory[i].size;
+ m68k_setup_node(i);
+ availmem = PAGE_ALIGN(availmem);
+ availmem += init_bootmem_node(NODE_DATA(i),
+ availmem >> PAGE_SHIFT,
+ addr >> PAGE_SHIFT,
+ end >> PAGE_SHIFT);
+ }
+
+ /*
+ * Map the physical memory available into the kernel virtual
+ * address space. First initialize the bootmem allocator with
+ * the memory we already mapped, so map_node() has something
+ * to allocate.
+ */
+ addr = m68k_memory[0].addr;
+ size = m68k_memory[0].size;
+ free_bootmem_node(NODE_DATA(0), availmem,
+ min(m68k_init_mapped_size, size) - (availmem - addr));
+ map_node(0);
+ if (size > m68k_init_mapped_size)
+ free_bootmem_node(NODE_DATA(0), addr + m68k_init_mapped_size,
+ size - m68k_init_mapped_size);
+
+ for (i = 1; i < m68k_num_memory; i++)
+ map_node(i);
+
+ flush_tlb_all();
+
+ /*
+ * initialize the bad page table and bad page to point
+ * to a couple of allocated pages
+ */
+ empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+
+ /*
+ * Set up SFC/DFC registers
+ */
+ set_fs(KERNEL_DS);
+
+#ifdef DEBUG
+ printk ("before free_area_init\n");
+#endif
+ for (i = 0; i < m68k_num_memory; i++) {
+ zones_size[ZONE_DMA] = m68k_memory[i].size >> PAGE_SHIFT;
+ free_area_init_node(i, zones_size,
+ m68k_memory[i].addr >> PAGE_SHIFT, NULL);
+ if (node_present_pages(i))
+ node_set_state(i, N_NORMAL_MEMORY);
+ }
+}
+
diff --git a/arch/m68k/mm/sun3kmap.c b/arch/m68k/mm/sun3kmap.c
new file mode 100644
index 000000000..3dc41158c
--- /dev/null
+++ b/arch/m68k/mm/sun3kmap.c
@@ -0,0 +1,161 @@
+/*
+ * linux/arch/m68k/mm/sun3kmap.c
+ *
+ * Copyright (C) 2002 Sam Creasey <sammy@sammy.net>
+ *
+ * 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/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/vmalloc.h>
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+#include <asm/sun3mmu.h>
+
+#undef SUN3_KMAP_DEBUG
+
+#ifdef SUN3_KMAP_DEBUG
+extern void print_pte_vaddr(unsigned long vaddr);
+#endif
+
+extern void mmu_emu_map_pmeg (int context, int vaddr);
+
+static inline void do_page_mapin(unsigned long phys, unsigned long virt,
+ unsigned long type)
+{
+ unsigned long pte;
+ pte_t ptep;
+
+ ptep = pfn_pte(phys >> PAGE_SHIFT, PAGE_KERNEL);
+ pte = pte_val(ptep);
+ pte |= type;
+
+ sun3_put_pte(virt, pte);
+
+#ifdef SUN3_KMAP_DEBUG
+ print_pte_vaddr(virt);
+#endif
+
+}
+
+static inline void do_pmeg_mapin(unsigned long phys, unsigned long virt,
+ unsigned long type, int pages)
+{
+
+ if(sun3_get_segmap(virt & ~SUN3_PMEG_MASK) == SUN3_INVALID_PMEG)
+ mmu_emu_map_pmeg(sun3_get_context(), virt);
+
+ while(pages) {
+ do_page_mapin(phys, virt, type);
+ phys += PAGE_SIZE;
+ virt += PAGE_SIZE;
+ pages--;
+ }
+}
+
+void __iomem *sun3_ioremap(unsigned long phys, unsigned long size,
+ unsigned long type)
+{
+ struct vm_struct *area;
+ unsigned long offset, virt, ret;
+ int pages;
+
+ if(!size)
+ return NULL;
+
+ /* page align */
+ offset = phys & (PAGE_SIZE-1);
+ phys &= ~(PAGE_SIZE-1);
+
+ size += offset;
+ size = PAGE_ALIGN(size);
+ if((area = get_vm_area(size, VM_IOREMAP)) == NULL)
+ return NULL;
+
+#ifdef SUN3_KMAP_DEBUG
+ printk("ioremap: got virt %p size %lx(%lx)\n",
+ area->addr, size, area->size);
+#endif
+
+ pages = size / PAGE_SIZE;
+ virt = (unsigned long)area->addr;
+ ret = virt + offset;
+
+ while(pages) {
+ int seg_pages;
+
+ seg_pages = (SUN3_PMEG_SIZE - (virt & SUN3_PMEG_MASK)) / PAGE_SIZE;
+ if(seg_pages > pages)
+ seg_pages = pages;
+
+ do_pmeg_mapin(phys, virt, type, seg_pages);
+
+ pages -= seg_pages;
+ phys += seg_pages * PAGE_SIZE;
+ virt += seg_pages * PAGE_SIZE;
+ }
+
+ return (void __iomem *)ret;
+
+}
+EXPORT_SYMBOL(sun3_ioremap);
+
+
+void __iomem *__ioremap(unsigned long phys, unsigned long size, int cache)
+{
+
+ return sun3_ioremap(phys, size, SUN3_PAGE_TYPE_IO);
+
+}
+EXPORT_SYMBOL(__ioremap);
+
+void iounmap(void __iomem *addr)
+{
+ vfree((void *)(PAGE_MASK & (unsigned long)addr));
+}
+EXPORT_SYMBOL(iounmap);
+
+/* sun3_map_test(addr, val) -- Reads a byte from addr, storing to val,
+ * trapping the potential read fault. Returns 0 if the access faulted,
+ * 1 on success.
+ *
+ * This function is primarily used to check addresses on the VME bus.
+ *
+ * Mucking with the page fault handler seems a little hackish to me, but
+ * SunOS, NetBSD, and Mach all implemented this check in such a manner,
+ * so I figure we're allowed.
+ */
+int sun3_map_test(unsigned long addr, char *val)
+{
+ int ret = 0;
+
+ __asm__ __volatile__
+ (".globl _sun3_map_test_start\n"
+ "_sun3_map_test_start:\n"
+ "1: moveb (%2), (%0)\n"
+ " moveq #1, %1\n"
+ "2:\n"
+ ".section .fixup,\"ax\"\n"
+ ".even\n"
+ "3: moveq #0, %1\n"
+ " jmp 2b\n"
+ ".previous\n"
+ ".section __ex_table,\"a\"\n"
+ ".align 4\n"
+ ".long 1b,3b\n"
+ ".previous\n"
+ ".globl _sun3_map_test_end\n"
+ "_sun3_map_test_end:\n"
+ : "=a"(val), "=r"(ret)
+ : "a"(addr));
+
+ return ret;
+}
+EXPORT_SYMBOL(sun3_map_test);
diff --git a/arch/m68k/mm/sun3mmu.c b/arch/m68k/mm/sun3mmu.c
new file mode 100644
index 000000000..269f81158
--- /dev/null
+++ b/arch/m68k/mm/sun3mmu.c
@@ -0,0 +1,98 @@
+/*
+ * linux/arch/m68k/mm/sun3mmu.c
+ *
+ * Implementations of mm routines specific to the sun3 MMU.
+ *
+ * Moved here 8/20/1999 Sam Creasey
+ *
+ */
+
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+
+extern void mmu_emu_init (unsigned long bootmem_end);
+
+const char bad_pmd_string[] = "Bad pmd in pte_alloc: %08lx\n";
+
+extern unsigned long num_pages;
+
+/* For the sun3 we try to follow the i386 paging_init() more closely */
+/* start_mem and end_mem have PAGE_OFFSET added already */
+/* now sets up tables using sun3 PTEs rather than i386 as before. --m */
+void __init paging_init(void)
+{
+ pgd_t * pg_dir;
+ pte_t * pg_table;
+ int i;
+ unsigned long address;
+ unsigned long next_pgtable;
+ unsigned long bootmem_end;
+ unsigned long zones_size[MAX_NR_ZONES] = { 0, };
+ unsigned long size;
+
+#ifdef TEST_VERIFY_AREA
+ wp_works_ok = 0;
+#endif
+ empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+
+ address = PAGE_OFFSET;
+ pg_dir = swapper_pg_dir;
+ memset (swapper_pg_dir, 0, sizeof (swapper_pg_dir));
+ memset (kernel_pg_dir, 0, sizeof (kernel_pg_dir));
+
+ size = num_pages * sizeof(pte_t);
+ size = (size + PAGE_SIZE) & ~(PAGE_SIZE-1);
+
+ next_pgtable = (unsigned long)alloc_bootmem_pages(size);
+ bootmem_end = (next_pgtable + size + PAGE_SIZE) & PAGE_MASK;
+
+ /* Map whole memory from PAGE_OFFSET (0x0E000000) */
+ pg_dir += PAGE_OFFSET >> PGDIR_SHIFT;
+
+ while (address < (unsigned long)high_memory) {
+ pg_table = (pte_t *) __pa (next_pgtable);
+ next_pgtable += PTRS_PER_PTE * sizeof (pte_t);
+ pgd_val(*pg_dir) = (unsigned long) pg_table;
+ pg_dir++;
+
+ /* now change pg_table to kernel virtual addresses */
+ pg_table = (pte_t *) __va ((unsigned long) pg_table);
+ for (i=0; i<PTRS_PER_PTE; ++i, ++pg_table) {
+ pte_t pte = pfn_pte(virt_to_pfn(address), PAGE_INIT);
+ if (address >= (unsigned long)high_memory)
+ pte_val (pte) = 0;
+ set_pte (pg_table, pte);
+ address += PAGE_SIZE;
+ }
+ }
+
+ mmu_emu_init(bootmem_end);
+
+ current->mm = NULL;
+
+ /* memory sizing is a hack stolen from motorola.c.. hope it works for us */
+ zones_size[ZONE_DMA] = ((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT;
+
+ /* I really wish I knew why the following change made things better... -- Sam */
+/* free_area_init(zones_size); */
+ free_area_init_node(0, zones_size,
+ (__pa(PAGE_OFFSET) >> PAGE_SHIFT) + 1, NULL);
+
+
+}
+
+
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 10:27:33 +0000