aboutsummaryrefslogtreecommitdiffstats
path: root/arch/ppc/mm/fsl_booke_mmu.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/mm/fsl_booke_mmu.c')
-rw-r--r--arch/ppc/mm/fsl_booke_mmu.c236
1 files changed, 0 insertions, 236 deletions
diff --git a/arch/ppc/mm/fsl_booke_mmu.c b/arch/ppc/mm/fsl_booke_mmu.c
deleted file mode 100644
index 123da03ab118..000000000000
--- a/arch/ppc/mm/fsl_booke_mmu.c
+++ /dev/null
@@ -1,236 +0,0 @@
-/*
- * Modifications by Kumar Gala (galak@kernel.crashing.org) to support
- * E500 Book E processors.
- *
- * Copyright 2004 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
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
- *
- * 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 <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 <asm/uaccess.h>
-#include <asm/smp.h>
-#include <asm/bootx.h>
-#include <asm/machdep.h>
-#include <asm/setup.h>
-
-extern void loadcam_entry(unsigned int index);
-unsigned int tlbcam_index;
-unsigned int num_tlbcam_entries;
-static unsigned long __cam0, __cam1, __cam2;
-extern unsigned long total_lowmem;
-extern unsigned long __max_low_memory;
-#define MAX_LOW_MEM CONFIG_LOWMEM_SIZE
-
-#define NUM_TLBCAMS (16)
-
-struct tlbcam {
- u32 MAS0;
- u32 MAS1;
- u32 MAS2;
- u32 MAS3;
- u32 MAS7;
-} TLBCAM[NUM_TLBCAMS];
-
-struct tlbcamrange {
- unsigned long start;
- unsigned long limit;
- phys_addr_t phys;
-} tlbcam_addrs[NUM_TLBCAMS];
-
-extern unsigned int tlbcam_index;
-
-/*
- * Return PA for this VA if it is mapped by a CAM, or 0
- */
-unsigned long v_mapped_by_tlbcam(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_mapped_by_tlbcam(unsigned long 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;
-}
-
-/*
- * Set up one of the I/D BAT (block address translation) register pairs.
- * The parameters are not checked; in particular size must be a power
- * of 4 between 4k and 256M.
- */
-void settlbcam(int index, unsigned long virt, phys_addr_t phys,
- unsigned int size, int flags, unsigned int pid)
-{
- unsigned int tsize, lz;
-
- asm ("cntlzw %0,%1" : "=r" (lz) : "r" (size));
- tsize = (21 - lz) / 2;
-
-#ifdef CONFIG_SMP
- 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 & PAGE_MASK) | MAS3_SX | MAS3_SR;
- TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_SW : 0);
-
-#ifndef CONFIG_KGDB /* want user access for breakpoints */
- if (flags & _PAGE_USER) {
- TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
- TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
- }
-#else
- TLBCAM[index].MAS3 |= MAS3_UX | MAS3_UR;
- TLBCAM[index].MAS3 |= ((flags & _PAGE_RW) ? MAS3_UW : 0);
-#endif
-
- tlbcam_addrs[index].start = virt;
- tlbcam_addrs[index].limit = virt + size - 1;
- tlbcam_addrs[index].phys = phys;
-
- loadcam_entry(index);
-}
-
-void invalidate_tlbcam_entry(int index)
-{
- TLBCAM[index].MAS0 = MAS0_TLBSEL(1) | MAS0_ESEL(index);
- TLBCAM[index].MAS1 = ~MAS1_VALID;
-
- loadcam_entry(index);
-}
-
-void __init cam_mapin_ram(unsigned long cam0, unsigned long cam1,
- unsigned long cam2)
-{
- settlbcam(0, KERNELBASE, PPC_MEMSTART, cam0, _PAGE_KERNEL, 0);
- tlbcam_index++;
- if (cam1) {
- tlbcam_index++;
- settlbcam(1, KERNELBASE+cam0, PPC_MEMSTART+cam0, cam1, _PAGE_KERNEL, 0);
- }
- if (cam2) {
- tlbcam_index++;
- settlbcam(2, KERNELBASE+cam0+cam1, PPC_MEMSTART+cam0+cam1, cam2, _PAGE_KERNEL, 0);
- }
-}
-
-/*
- * MMU_init_hw does the chip-specific initialization of the MMU hardware.
- */
-void __init MMU_init_hw(void)
-{
- flush_instruction_cache();
-}
-
-unsigned long __init mmu_mapin_ram(void)
-{
- cam_mapin_ram(__cam0, __cam1, __cam2);
-
- return __cam0 + __cam1 + __cam2;
-}
-
-
-void __init
-adjust_total_lowmem(void)
-{
- unsigned long max_low_mem = MAX_LOW_MEM;
- unsigned long cam_max = 0x10000000;
- unsigned long ram;
-
- /* adjust CAM size to max_low_mem */
- if (max_low_mem < cam_max)
- cam_max = max_low_mem;
-
- /* adjust lowmem size to max_low_mem */
- if (max_low_mem < total_lowmem)
- ram = max_low_mem;
- else
- ram = total_lowmem;
-
- /* Calculate CAM values */
- __cam0 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam0 > cam_max)
- __cam0 = cam_max;
- ram -= __cam0;
- if (ram) {
- __cam1 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam1 > cam_max)
- __cam1 = cam_max;
- ram -= __cam1;
- }
- if (ram) {
- __cam2 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam2 > cam_max)
- __cam2 = cam_max;
- ram -= __cam2;
- }
-
- printk(KERN_INFO "Memory CAM mapping: CAM0=%ldMb, CAM1=%ldMb,"
- " CAM2=%ldMb residual: %ldMb\n",
- __cam0 >> 20, __cam1 >> 20, __cam2 >> 20,
- (total_lowmem - __cam0 - __cam1 - __cam2) >> 20);
- __max_low_memory = max_low_mem = __cam0 + __cam1 + __cam2;
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.