patch-2.3.48 linux/arch/mips/mm/r6000.c

• Lines: 200
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.47/linux/arch/mips/mm/r6000.c
• Orig date: Tue Aug 31 17:29:12 1999

diff -u --recursive --new-file v2.3.47/linux/arch/mips/mm/r6000.c linux/arch/mips/mm/r6000.c
@@ -1,199 +0,0 @@
-/* $Id: r6000.c,v 1.6 1999/01/04 16:03:54 ralf Exp $
- *
- * r6000.c: MMU and cache routines for the R6000 processors.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-
-#include <asm/cacheops.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/sgialib.h>
-#include <asm/mmu_context.h>
-
-__asm__(".set mips3"); /* because we know... */
-
-/* Cache operations. XXX Write these dave... */
-static inline void r6000_flush_cache_all(void)
-{
-	/* XXX */
-}
-
-static void r6000_flush_cache_mm(struct mm_struct *mm)
-{
-	/* XXX */
-}
-
-static void r6000_flush_cache_range(struct mm_struct *mm,
-				    unsigned long start,
-				    unsigned long end)
-{
-	/* XXX */
-}
-
-static void r6000_flush_cache_page(struct vm_area_struct *vma,
-				   unsigned long page)
-{
-	/* XXX */
-}
-
-static void r6000_flush_page_to_ram(unsigned long page)
-{
-	/* XXX */
-}
-
-static void r6000_flush_cache_sigtramp(unsigned long page)
-{
-	/* XXX */
-}
-
-/* TLB operations. XXX Write these dave... */
-static inline void r6000_flush_tlb_all(void)
-{
-	/* XXX */
-}
-
-static void r6000_flush_tlb_mm(struct mm_struct *mm)
-{
-	/* XXX */
-}
-
-static void r6000_flush_tlb_range(struct mm_struct *mm, unsigned long start,
-				  unsigned long end)
-{
-	/* XXX */
-}
-
-static void r6000_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
-	/* XXX */
-}
-
-static void r6000_load_pgd(unsigned long pg_dir)
-{
-}
-
-static void r6000_pgd_init(unsigned long page)
-{
-	unsigned long dummy1, dummy2;
-
-	/*
-	 * This version is optimized for the R6000.  We generate dirty lines
-	 * in the datacache, overwrite these lines with zeros and then flush
-	 * the cache.  Sounds horribly complicated but is just a trick to
-	 * avoid unnecessary loads of from memory and uncached stores which
-	 * are very expensive.  Not tested yet as the R6000 is a rare CPU only
-	 * available in SGI machines and I don't have one.
-	 */
-	__asm__ __volatile__(
-		".set\tnoreorder\n"
-		"1:\t"
-		"cache\t%5,(%0)\n\t"
-		"sw\t%2,(%0)\n\t"
-		"sw\t%2,4(%0)\n\t"
-		"sw\t%2,8(%0)\n\t"
-		"sw\t%2,12(%0)\n\t"
-		"cache\t%5,16(%0)\n\t"
-		"sw\t%2,16(%0)\n\t"
-		"sw\t%2,20(%0)\n\t"
-		"sw\t%2,24(%0)\n\t"
-		"sw\t%2,28(%0)\n\t"
-		"subu\t%1,1\n\t"
-		"bnez\t%1,1b\n\t"
-		"addiu\t%0,32\n\t"
-		".set\treorder"
-		:"=r" (dummy1),
-		 "=r" (dummy2)
-		:"r" ((unsigned long) invalid_pte_table),
-		 "0" (page),
-		 "1" (USER_PTRS_PER_PGD/8),
-		 "i" (Create_Dirty_Excl_D));
-}
-
-static void r6000_update_mmu_cache(struct vm_area_struct * vma,
-				   unsigned long address, pte_t pte)
-{
-	r6000_flush_tlb_page(vma, address);
-	/*
-	 * FIXME: We should also reload a new entry into the TLB to
-	 * avoid unnecessary exceptions.
-	 */
-}
-
-static void r6000_show_regs(struct pt_regs * regs)
-{
-	/*
-	 * Saved main processor registers
-	 */
-	printk("$0 : %08x %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-	       0, (unsigned long) regs->regs[1], (unsigned long) regs->regs[2],
-	       (unsigned long) regs->regs[3], (unsigned long) regs->regs[4],
-	       (unsigned long) regs->regs[5], (unsigned long) regs->regs[6],
-	       (unsigned long) regs->regs[7]);
-	printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-	       (unsigned long) regs->regs[8], (unsigned long) regs->regs[9],
-	       (unsigned long) regs->regs[10], (unsigned long) regs->regs[11],
-               (unsigned long) regs->regs[12], (unsigned long) regs->regs[13],
-	       (unsigned long) regs->regs[14], (unsigned long) regs->regs[15]);
-	printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-	       (unsigned long) regs->regs[16], (unsigned long) regs->regs[17],
-	       (unsigned long) regs->regs[18], (unsigned long) regs->regs[19],
-               (unsigned long) regs->regs[20], (unsigned long) regs->regs[21],
-	       (unsigned long) regs->regs[22], (unsigned long) regs->regs[23]);
-	printk("$24: %08lx %08lx                   %08lx %08lx %08lx %08lx\n",
-	       (unsigned long) regs->regs[24], (unsigned long) regs->regs[25],
-	       (unsigned long) regs->regs[28], (unsigned long) regs->regs[29],
-               (unsigned long) regs->regs[30], (unsigned long) regs->regs[31]);
-
-	/*
-	 * Saved cp0 registers
-	 */
-	printk("epc  : %08lx\nStatus: %08x\nCause : %08x\n",
-	       (unsigned long) regs->cp0_epc, (unsigned int) regs->cp0_status,
-	       (unsigned int) regs->cp0_cause);
-}
-
-static void r6000_add_wired_entry(unsigned long entrylo0, unsigned long entrylo1,
-				  unsigned long entryhi, unsigned long pagemask)
-{
-        /* XXX */
-}
-
-static int r6000_user_mode(struct pt_regs *regs)
-{
-	return !(regs->cp0_status & 0x4);
-}
-
-void __init ld_mmu_r6000(void)
-{
-	flush_cache_all = r6000_flush_cache_all;
-	flush_cache_mm = r6000_flush_cache_mm;
-	flush_cache_range = r6000_flush_cache_range;
-	flush_cache_page = r6000_flush_cache_page;
-	flush_cache_sigtramp = r6000_flush_cache_sigtramp;
-	flush_page_to_ram = r6000_flush_page_to_ram;
-
-	flush_tlb_all = r6000_flush_tlb_all;
-	flush_tlb_mm = r6000_flush_tlb_mm;
-	flush_tlb_range = r6000_flush_tlb_range;
-	flush_tlb_page = r6000_flush_tlb_page;
-	r6000_asid_setup();
-
-	load_pgd = r6000_load_pgd;
-	pgd_init = r6000_pgd_init;
-	update_mmu_cache = r6000_update_mmu_cache;
-
-	show_regs = r6000_show_regs;
-    
-        add_wired_entry = r6000_add_wired_entry;
-
-	user_mode = r6000_user_mode;
-
-	flush_cache_all();
-	flush_tlb_all();
-}