diff -r 000000000000 -r a41df078684a kerneltest/e32test/debug/d_debugapi.cia --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/kerneltest/e32test/debug/d_debugapi.cia Mon Oct 19 15:55:17 2009 +0100 @@ -0,0 +1,67 @@ +// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). +// All rights reserved. +// This component and the accompanying materials are made available +// under the terms of the License "Eclipse Public License v1.0" +// which accompanies this distribution, and is available +// at the URL "http://www.eclipse.org/legal/epl-v10.html". +// +// Initial Contributors: +// Nokia Corporation - initial contribution. +// +// Contributors: +// +// Description: +// e32test\debug\d_debugapi.cia +// +// + +#include +#include "d_debugapi.h" + +__NAKED__ TInt DDebugAPIChecker::ReadFromOtherProcessArmv6() + { + + //Save regs. + asm("stmfd sp!,{r4-r7,lr}"); + + //Copy all data we need into regs. We can not access the memory of ... + //...the current process once we start changing MMU content. + asm("ldr r1, [r0, #%a0]" : : "i" _FOFF(DDebugAPIChecker, iOtherProcess_OsAsid)); + asm("ldr r2, [r0, #%a0]" : : "i" _FOFF(DDebugAPIChecker, iOtherProcess_LocalPageDir)); + asm("ldr r3, [r0, #%a0]" : : "i" _FOFF(DDebugAPIChecker, iCurrentProcess_OsAsid)); + asm("ldr r4, [r0, #%a0]" : : "i" _FOFF(DDebugAPIChecker, iCurrentProcess_LocalPageDir)); + asm("ldr r5, [r0, #%a0]" : : "i" _FOFF(DDebugAPIChecker, iAddress)); + + asm("mrc p15, 0, r6, c2, c0, 0 "); + asm("and r6, r6, #0x7f "); // r6 = page table cache/sharing attributes + asm("orr r2, r2, r6 "); // add in to other process page directory address + asm("orr r4, r4, r6 "); // add in to this process page directory address + asm("mov r6, #0 "); + + //Disable interrupts + asm("mov r7, #0xd3 "); + asm("msr cpsr, r7 "); + + //Switch MMU to the-other-process + asm("mcr p15, 0, r6, c7, c10, 4 "); // drain write buffer before changing MMU registers (see ARMv6 specs) +//! asm("orr r2, r2 #0x18"); //Uncomment this line on 1136 (r0p2) with L2 cache due to Erratum 317041. + asm("mcr p15, 0, r2, c2, c0, 0 "); // set TTBR0 - no TLB flush required due to ASID + asm("mcr p15, 0, r1, c13, c0, 1 "); // set ASID + + //Read the memory from the-other-process + asm("ldr r0, [r5]"); + + //Switch MMU back to the-current-process + asm("mcr p15, 0, r6, c7, c10, 4 "); // drain write buffer before changing MMU registers (see ARMv6 specs) +//! asm("orr r4, r4 #0x18"); //Uncomment this line on 1136 (r0p2) with L2 cache due to Erratum 317041. + asm("mcr p15, 0, r4, c2, c0, 0 "); // set TTBR0 - no TLB flush required due to ASID + asm("mcr p15, 0, r3, c13, c0, 1 "); // set ASID + + + //Re-enable interrupts + asm("mov r7, #0x13 "); + asm("msr cpsr, r7 "); + + //Return + asm("ldmfd sp!,{r4-r7,pc}"); + }