diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/mm/fsl_booke_mmu.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/mm/fsl_booke_mmu.c | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/mm/fsl_booke_mmu.c b/ANDROID_3.4.5/arch/powerpc/mm/fsl_booke_mmu.c deleted file mode 100644 index 07ba45b0..00000000 --- a/ANDROID_3.4.5/arch/powerpc/mm/fsl_booke_mmu.c +++ /dev/null @@ -1,244 +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 <asm/uaccess.h> -#include <asm/smp.h> -#include <asm/machdep.h> -#include <asm/setup.h> - -#include "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]; - -extern unsigned int tlbcam_index; - -unsigned long tlbcam_sz(int idx) -{ - return tlbcam_addrs[idx].limit - tlbcam_addrs[idx].start + 1; -} - -/* - * Return PA for this VA if it is mapped by a CAM, or 0 - */ -phys_addr_t 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(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; -} - -/* - * 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; - -#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 & 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(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; - - loadcam_entry(index); -} - -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; -} - -unsigned long map_mem_in_cams(unsigned long ram, int max_cam_idx) -{ - int i; - unsigned long virt = PAGE_OFFSET; - phys_addr_t phys = memstart_addr; - 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); - settlbcam(i, virt, phys, cam_sz, PAGE_KERNEL_X, 0); - - ram -= cam_sz; - amount_mapped += cam_sz; - virt += cam_sz; - phys += cam_sz; - } - tlbcam_index = i; - - return amount_mapped; -} - -#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 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); - - __max_low_memory = map_mem_in_cams(ram, CONFIG_LOWMEM_CAM_NUM); - - 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)); -} -#endif |