microblaze: Remove ancient code

I found several function which we don't use that's why I am removing them.
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/include/asm/exceptions.h

@@ -64,12 +64,6 @@ asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
 void die(const char *str, struct pt_regs *fp, long err);
 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
 
-#ifdef CONFIG_MMU
-void __bug(const char *file, int line, void *data);
-int bad_trap(int trap_num, struct pt_regs *regs);
-int debug_trap(struct pt_regs *regs);
-#endif /* CONFIG_MMU */
-
 #if defined(CONFIG_KGDB)
 void (*debugger)(struct pt_regs *regs);
 int (*debugger_bpt)(struct pt_regs *regs);

arch/microblaze/include/asm/io.h

@@ -139,8 +139,6 @@ static inline void writel(unsigned int v, volatile void __iomem *addr)
 
 #ifdef CONFIG_MMU
 
-#define mm_ptov(addr)		((void *)__phys_to_virt(addr))
-#define mm_vtop(addr)		((unsigned long)__virt_to_phys(addr))
 #define phys_to_virt(addr)	((void *)__phys_to_virt(addr))
 #define virt_to_phys(addr)	((unsigned long)__virt_to_phys(addr))
 #define virt_to_bus(addr)	((unsigned long)__virt_to_phys(addr))

arch/microblaze/include/asm/pgtable.h

@@ -511,15 +511,6 @@ static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
 
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 
-/*
- * When flushing the tlb entry for a page, we also need to flush the hash
- * table entry.  flush_hash_page is assembler (for speed) in hashtable.S.
- */
-extern int flush_hash_page(unsigned context, unsigned long va, pte_t *ptep);
-
-/* Add an HPTE to the hash table */
-extern void add_hash_page(unsigned context, unsigned long va, pte_t *ptep);
-
 /*
  * Encode and decode a swap entry.
  * Note that the bits we use in a PTE for representing a swap entry
@@ -533,15 +524,7 @@ extern void add_hash_page(unsigned context, unsigned long va, pte_t *ptep);
 #define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) >> 2 })
 #define __swp_entry_to_pte(x)	((pte_t) { (x).val << 2 })
 
-
-/* CONFIG_APUS */
-/* For virtual address to physical address conversion */
-extern void cache_clear(__u32 addr, int length);
-extern void cache_push(__u32 addr, int length);
-extern int mm_end_of_chunk(unsigned long addr, int len);
 extern unsigned long iopa(unsigned long addr);
-/* extern unsigned long mm_ptov(unsigned long addr) \
-	__attribute__ ((const)); TBD */
 
 /* Values for nocacheflag and cmode */
 /* These are not used by the APUS kernel_map, but prevents
@@ -552,18 +535,6 @@ extern unsigned long iopa(unsigned long addr);
 #define	IOMAP_NOCACHE_NONSER	2
 #define	IOMAP_NO_COPYBACK	3
 
-/*
- * Map some physical address range into the kernel address space.
- */
-extern unsigned long kernel_map(unsigned long paddr, unsigned long size,
-				int nocacheflag, unsigned long *memavailp);
-
-/*
- * Set cache mode of (kernel space) address range.
- */
-extern void kernel_set_cachemode(unsigned long address, unsigned long size,
-				unsigned int cmode);
-
 /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
 #define kern_addr_valid(addr)	(1)
 
@@ -577,10 +548,6 @@ extern void kernel_set_cachemode(unsigned long address, unsigned long size,
 void do_page_fault(struct pt_regs *regs, unsigned long address,
 		   unsigned long error_code);
 
-void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
-			     unsigned int size, int flags);
-
-void __init adjust_total_lowmem(void);
 void mapin_ram(void);
 int map_page(unsigned long va, phys_addr_t pa, int flags);
 

arch/microblaze/kernel/traps.c

@@ -95,37 +95,3 @@ void dump_stack(void)
 	show_stack(NULL, NULL);
 }
 EXPORT_SYMBOL(dump_stack);
-
-#ifdef CONFIG_MMU
-void __bug(const char *file, int line, void *data)
-{
-	if (data)
-		printk(KERN_CRIT "kernel BUG at %s:%d (data = %p)!\n",
-			file, line, data);
-	else
-		printk(KERN_CRIT "kernel BUG at %s:%d!\n", file, line);
-
-	machine_halt();
-}
-
-int bad_trap(int trap_num, struct pt_regs *regs)
-{
-	printk(KERN_CRIT
-		"unimplemented trap %d called at 0x%08lx, pid %d!\n",
-		trap_num, regs->pc, current->pid);
-	return -ENOSYS;
-}
-
-int debug_trap(struct pt_regs *regs)
-{
-	int i;
-	printk(KERN_CRIT "debug trap\n");
-	for (i = 0; i < 32; i++) {
-		/* printk("r%i:%08X\t",i,regs->gpr[i]); */
-		if ((i % 4) == 3)
-			printk(KERN_CRIT "\n");
-	}
-	printk(KERN_CRIT "pc:%08lX\tmsr:%08lX\n", regs->pc, regs->msr);
-	return -ENOSYS;
-}
-#endif

arch/microblaze/mm/pgtable.c

@@ -161,24 +161,6 @@ int map_page(unsigned long va, phys_addr_t pa, int flags)
 	return err;
 }
 
-void __init adjust_total_lowmem(void)
-{
-/* TBD */
-#if 0
-	unsigned long max_low_mem = MAX_LOW_MEM;
-
-	if (total_lowmem > max_low_mem) {
-		total_lowmem = max_low_mem;
-#ifndef CONFIG_HIGHMEM
-		printk(KERN_INFO "Warning, memory limited to %ld Mb, use "
-				"CONFIG_HIGHMEM to reach %ld Mb\n",
-				max_low_mem >> 20, total_memory >> 20);
-		total_memory = total_lowmem;
-#endif /* CONFIG_HIGHMEM */
-	}
-#endif
-}
-
 /*
  * Map in all of physical memory starting at CONFIG_KERNEL_START.
  */
@@ -206,24 +188,6 @@ void __init mapin_ram(void)
 /* is x a power of 2? */
 #define is_power_of_2(x)	((x) != 0 && (((x) & ((x) - 1)) == 0))
 
-/*
- * Set up a mapping for a block of I/O.
- * virt, phys, size must all be page-aligned.
- * This should only be called before ioremap is called.
- */
-void __init io_block_mapping(unsigned long virt, phys_addr_t phys,
-			     unsigned int size, int flags)
-{
-	int i;
-
-	if (virt > CONFIG_KERNEL_START && virt < ioremap_bot)
-		ioremap_bot = ioremap_base = virt;
-
-	/* Put it in the page tables. */
-	for (i = 0; i < size; i += PAGE_SIZE)
-		map_page(virt + i, phys + i, flags);
-}
-
 /* Scan the real Linux page tables and return a PTE pointer for
  * a virtual address in a context.
  * Returns true (1) if PTE was found, zero otherwise.  The pointer to