powerpc/mm: Move nohash specifics in subdirectory mm/nohash

Many files in arch/powerpc/mm are only for nohash. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Shorten new filenames]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 326 deletions

diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
deleted file mode 100644
index 71a1a36751dd..000000000000
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * Modifications by Kumar Gala (galak@kernel.crashing.org) to support
- * E500 Book E processors.
- *
- * Copyright 2004,2010 Freescale Semiconductor, Inc.
- *
- * This file contains the routines for initializing the MMU
- * on the 4xx series of chips.
- *  -- paulus
- *
- *  Derived from arch/ppc/mm/init.c:
- *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- *  Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
- *  and Cort Dougan (PReP) (cort@cs.nmt.edu)
- *    Copyright (C) 1996 Paul Mackerras
- *
- *  Derived from "arch/i386/mm/init.c"
- *    Copyright (C) 1991, 1992, 1993, 1994  Linus Torvalds
- *
- *  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.
- *
- */
-
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/ptrace.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/swap.h>
-#include <linux/stddef.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/highmem.h>
-#include <linux/memblock.h>
-
-#include <asm/pgalloc.h>
-#include <asm/prom.h>
-#include <asm/io.h>
-#include <asm/mmu_context.h>
-#include <asm/pgtable.h>
-#include <asm/mmu.h>
-#include <linux/uaccess.h>
-#include <asm/smp.h>
-#include <asm/machdep.h>
-#include <asm/setup.h>
-#include <asm/paca.h>
-
-#include <mm/mmu_decl.h>
-
-unsigned int tlbcam_index;
-
-#define NUM_TLBCAMS	(64)
-struct tlbcam TLBCAM[NUM_TLBCAMS];
-
-struct tlbcamrange {
-	unsigned long start;
-	unsigned long limit;
-	phys_addr_t phys;
-} tlbcam_addrs[NUM_TLBCAMS];
-
-unsigned long tlbcam_sz(int idx)
-{
-	return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1;
-}
-
-#ifdef CONFIG_FSL_BOOKE
-/*
- * Return PA for this VA if it is mapped by a CAM, or 0
- */
-phys_addr_t v_block_mapped(unsigned long va)
-{
-	int b;
-	for (b = 0; b < tlbcam_index; ++b)
-		if (va >= tlbcam_addrs[b].start && va < tlbcam_addrs[b].limit)
-			return tlbcam_addrs[b].phys + (va - tlbcam_addrs[b].start);
-	return 0;
-}
-
-/*
- * Return VA for a given PA or 0 if not mapped
- */
-unsigned long p_block_mapped(phys_addr_t pa)
-{
-	int b;
-	for (b = 0; b < tlbcam_index; ++b)
-		if (pa >= tlbcam_addrs[b].phys
-			&& pa < (tlbcam_addrs[b].limit-tlbcam_addrs[b].start)
-		              +tlbcam_addrs[b].phys)
-			return tlbcam_addrs[b].start+(pa-tlbcam_addrs[b].phys);
-	return 0;
-}
-#endif
-
-/*
- * Set up a variable-size TLB entry (tlbcam). The parameters are not checked;
- * in particular size must be a power of 4 between 4k and the max supported by
- * an implementation; max may further be limited by what can be represented in
- * an unsigned long (for example, 32-bit implementations cannot support a 4GB
- * size).
- */
-static void settlbcam(int index, unsigned long virt, phys_addr_t phys,
-		unsigned long size, unsigned long flags, unsigned int pid)
-{
-	unsigned int tsize;
-
-	tsize = __ilog2(size) - 10;
-
-#if defined(CONFIG_SMP) || defined(CONFIG_PPC_E500MC)
-	if ((flags & _PAGE_NO_CACHE) == 0)
-		flags |= _PAGE_COHERENT;
-#endif
-
-	TLBCAM[index].MAS0 = MAS0_TLBSEL(1) | MAS0_ESEL(index) | MAS0_NV(index+1);
-	TLBCAM[index].MAS1 = MAS1_VALID | MAS1_IPROT | MAS1_TSIZE(tsize) | MAS1_TID(pid);
-	TLBCAM[index].MAS2 = virt & PAGE_MASK;
-
-	TLBCAM[index].MAS2 |= (flags & _PAGE_WRITETHRU) ? MAS2_W : 0;
-	TLBCAM[index].MAS2 |= (flags & _PAGE_NO_CACHE) ? MAS2_I : 0;
-	TLBCAM[index].MAS2 |= (flags & _PAGE_COHERENT) ? MAS2_M : 0;
-	TLBCAM[index].MAS2 |= (flags & _PAGE_GUARDED) ? MAS2_G : 0;
-	TLBCAM[index].MAS2 |= (flags & _PAGE_ENDIAN) ? MAS2_E : 0;
-
-	TLBCAM[index].MAS3 = (phys & MAS3_RPN) | MAS3_SX | MAS3_SR;
-	TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_SW : 0);
-	if (mmu_has_feature(MMU_FTR_BIG_PHYS))
-		TLBCAM[index].MAS7 = (u64)phys >> 32;
-
-	/* Below is unlikely -- only for large user pages or similar */
-	if (pte_user(__pte(flags))) {
-	   TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
-	   TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
-	}
-
-	tlbcam_addrs[index].start = virt;
-	tlbcam_addrs[index].limit = virt + size - 1;
-	tlbcam_addrs[index].phys = phys;
-}
-
-unsigned long calc_cam_sz(unsigned long ram, unsigned long virt,
-			  phys_addr_t phys)
-{
-	unsigned int camsize = __ilog2(ram);
-	unsigned int align = __ffs(virt | phys);
-	unsigned long max_cam;
-
-	if ((mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1) {
-		/* Convert (4^max) kB to (2^max) bytes */
-		max_cam = ((mfspr(SPRN_TLB1CFG) >> 16) & 0xf) * 2 + 10;
-		camsize &= ~1U;
-		align &= ~1U;
-	} else {
-		/* Convert (2^max) kB to (2^max) bytes */
-		max_cam = __ilog2(mfspr(SPRN_TLB1PS)) + 10;
-	}
-
-	if (camsize > align)
-		camsize = align;
-	if (camsize > max_cam)
-		camsize = max_cam;
-
-	return 1UL << camsize;
-}
-
-static unsigned long map_mem_in_cams_addr(phys_addr_t phys, unsigned long virt,
-					unsigned long ram, int max_cam_idx,
-					bool dryrun)
-{
-	int i;
-	unsigned long amount_mapped = 0;
-
-	/* Calculate CAM values */
-	for (i = 0; ram && i < max_cam_idx; i++) {
-		unsigned long cam_sz;
-
-		cam_sz = calc_cam_sz(ram, virt, phys);
-		if (!dryrun)
-			settlbcam(i, virt, phys, cam_sz,
-				  pgprot_val(PAGE_KERNEL_X), 0);
-
-		ram -= cam_sz;
-		amount_mapped += cam_sz;
-		virt += cam_sz;
-		phys += cam_sz;
-	}
-
-	if (dryrun)
-		return amount_mapped;
-
-	loadcam_multi(0, i, max_cam_idx);
-	tlbcam_index = i;
-
-#ifdef CONFIG_PPC64
-	get_paca()->tcd.esel_next = i;
-	get_paca()->tcd.esel_max = mfspr(SPRN_TLB1CFG) & TLBnCFG_N_ENTRY;
-	get_paca()->tcd.esel_first = i;
-#endif
-
-	return amount_mapped;
-}
-
-unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx, bool dryrun)
-{
-	unsigned long virt = PAGE_OFFSET;
-	phys_addr_t phys = memstart_addr;
-
-	return map_mem_in_cams_addr(phys, virt, ram, max_cam_idx, dryrun);
-}
-
-#ifdef CONFIG_PPC32
-
-#if defined(CONFIG_LOWMEM_CAM_NUM_BOOL) && (CONFIG_LOWMEM_CAM_NUM >= NUM_TLBCAMS)
-#error "LOWMEM_CAM_NUM must be less than NUM_TLBCAMS"
-#endif
-
-unsigned long __init mmu_mapin_ram(unsigned long base, unsigned long top)
-{
-	return tlbcam_addrs[tlbcam_index - 1].limit - PAGE_OFFSET + 1;
-}
-
-/*
- * MMU_init_hw does the chip-specific initialization of the MMU hardware.
- */
-void __init MMU_init_hw(void)
-{
-	flush_instruction_cache();
-}
-
-void __init adjust_total_lowmem(void)
-{
-	unsigned long ram;
-	int i;
-
-	/* adjust lowmem size to __max_low_memory */
-	ram = min((phys_addr_t)__max_low_memory, (phys_addr_t)total_lowmem);
-
-	i = switch_to_as1();
-	__max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM, false);
-	restore_to_as0(i, 0, 0, 1);
-
-	pr_info("Memory CAM mapping: ");
-	for (i = 0; i < tlbcam_index - 1; i++)
-		pr_cont("%lu/", tlbcam_sz(i) >> 20);
-	pr_cont("%lu Mb, residual: %dMb\n", tlbcam_sz(tlbcam_index - 1) >> 20,
-	        (unsigned int)((total_lowmem - __max_low_memory) >> 20));
-
-	memblock_set_current_limit(memstart_addr + __max_low_memory);
-}
-
-void setup_initial_memory_limit(phys_addr_t first_memblock_base,
-				phys_addr_t first_memblock_size)
-{
-	phys_addr_t limit = first_memblock_base + first_memblock_size;
-
-	/* 64M mapped initially according to head_fsl_booke.S */
-	memblock_set_current_limit(min_t(u64, limit, 0x04000000));
-}
-
-#ifdef CONFIG_RELOCATABLE
-int __initdata is_second_reloc;
-notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
-{
-	unsigned long base = KERNELBASE;
-
-	kernstart_addr = start;
-	if (is_second_reloc) {
-		virt_phys_offset = PAGE_OFFSET - memstart_addr;
-		return;
-	}
-
-	/*
-	 * Relocatable kernel support based on processing of dynamic
-	 * relocation entries. Before we get the real memstart_addr,
-	 * We will compute the virt_phys_offset like this:
-	 * virt_phys_offset = stext.run - kernstart_addr
-	 *
-	 * stext.run = (KERNELBASE & ~0x3ffffff) +
-	 *				(kernstart_addr & 0x3ffffff)
-	 * When we relocate, we have :
-	 *
-	 *	(kernstart_addr & 0x3ffffff) = (stext.run & 0x3ffffff)
-	 *
-	 * hence:
-	 *  virt_phys_offset = (KERNELBASE & ~0x3ffffff) -
-	 *                              (kernstart_addr & ~0x3ffffff)
-	 *
-	 */
-	start &= ~0x3ffffff;
-	base &= ~0x3ffffff;
-	virt_phys_offset = base - start;
-	early_get_first_memblock_info(__va(dt_ptr), NULL);
-	/*
-	 * We now get the memstart_addr, then we should check if this
-	 * address is the same as what the PAGE_OFFSET map to now. If
-	 * not we have to change the map of PAGE_OFFSET to memstart_addr
-	 * and do a second relocation.
-	 */
-	if (start != memstart_addr) {
-		int n;
-		long offset = start - memstart_addr;
-
-		is_second_reloc = 1;
-		n = switch_to_as1();
-		/* map a 64M area for the second relocation */
-		if (memstart_addr > start)
-			map_mem_in_cams(0x4000000, CONFIG_LOWMEM_CAM_NUM,
-					false);
-		else
-			map_mem_in_cams_addr(start, PAGE_OFFSET + offset,
-					0x4000000, CONFIG_LOWMEM_CAM_NUM,
-					false);
-		restore_to_as0(n, offset, __va(dt_ptr), 1);
-		/* We should never reach here */
-		panic("Relocation error");
-	}
-}
-#endif
-#endif