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Commit 51ae8d4a authored by Bharat Bhushan's avatar Bharat Bhushan Committed by Scott Wood
Browse files

powerpc: move debug registers in a structure 



This way we can use same data type struct with KVM and
also help in using other debug related function.

Signed-off-by: default avatarBharat Bhushan <bharat.bhushan@freescale.com>
Acked-by: default avatarMichael Neuling <mikey@neuling.org>
[scottwood@freescale.com: removed obvious debug_reg comment]
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent 660970fe

arch/powerpc/include/asm/processor.h

+19 −15
Original line number Diff line number Diff line
@@ -167,21 +167,7 @@ struct thread_vr_state { 
	vector128	vscr __attribute__((aligned(16)));

};



struct thread_struct {

	unsigned long	ksp;		/* Kernel stack pointer */

#ifdef CONFIG_PPC64

	unsigned long	ksp_vsid;

#endif

	struct pt_regs	*regs;		/* Pointer to saved register state */

	mm_segment_t	fs;		/* for get_fs() validation */

#ifdef CONFIG_BOOKE

	/* BookE base exception scratch space; align on cacheline */

	unsigned long	normsave[8] ____cacheline_aligned;

#endif

#ifdef CONFIG_PPC32

	void		*pgdir;		/* root of page-table tree */

	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */

#endif

struct debug_reg {

#ifdef CONFIG_PPC_ADV_DEBUG_REGS

	/*

	 * The following help to manage the use of Debug Control Registers
@@ -218,6 +204,24 @@ struct thread_struct { 
	unsigned long	dvc2;

#endif

#endif

};



struct thread_struct {

	unsigned long	ksp;		/* Kernel stack pointer */

#ifdef CONFIG_PPC64

	unsigned long	ksp_vsid;

#endif

	struct pt_regs	*regs;		/* Pointer to saved register state */

	mm_segment_t	fs;		/* for get_fs() validation */

#ifdef CONFIG_BOOKE

	/* BookE base exception scratch space; align on cacheline */

	unsigned long	normsave[8] ____cacheline_aligned;

#endif

#ifdef CONFIG_PPC32

	void		*pgdir;		/* root of page-table tree */

	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */

#endif

	struct debug_reg debug;

	struct thread_fp_state	fp_state;

	struct thread_fp_state	*fp_save_area;

	int		fpexc_mode;	/* floating-point exception mode */

arch/powerpc/include/asm/reg_booke.h

+4 −4
Original line number Diff line number Diff line
@@ -381,7 +381,7 @@ 
#define DBCR0_IA34T	0x00004000	/* Instr Addr 3-4 range Toggle */

#define DBCR0_FT	0x00000001	/* Freeze Timers on debug event */



#define dbcr_iac_range(task)	((task)->thread.dbcr0)

#define dbcr_iac_range(task)	((task)->thread.debug.dbcr0)

#define DBCR_IAC12I	DBCR0_IA12			/* Range Inclusive */

#define DBCR_IAC12X	(DBCR0_IA12 | DBCR0_IA12X)	/* Range Exclusive */

#define DBCR_IAC12MODE	(DBCR0_IA12 | DBCR0_IA12X)	/* IAC 1-2 Mode Bits */
@@ -395,7 +395,7 @@ 
#define DBCR1_DAC1W	0x20000000	/* DAC1 Write Debug Event */

#define DBCR1_DAC2W	0x10000000	/* DAC2 Write Debug Event */



#define dbcr_dac(task)	((task)->thread.dbcr1)

#define dbcr_dac(task)	((task)->thread.debug.dbcr1)

#define DBCR_DAC1R	DBCR1_DAC1R

#define DBCR_DAC1W	DBCR1_DAC1W

#define DBCR_DAC2R	DBCR1_DAC2R
@@ -441,7 +441,7 @@ 
#define DBCR0_CRET	0x00000020	/* Critical Return Debug Event */

#define DBCR0_FT	0x00000001	/* Freeze Timers on debug event */



#define dbcr_dac(task)	((task)->thread.dbcr0)

#define dbcr_dac(task)	((task)->thread.debug.dbcr0)

#define DBCR_DAC1R	DBCR0_DAC1R

#define DBCR_DAC1W	DBCR0_DAC1W

#define DBCR_DAC2R	DBCR0_DAC2R
@@ -475,7 +475,7 @@ 
#define DBCR1_IAC34MX	0x000000C0	/* Instr Addr 3-4 range eXclusive */

#define DBCR1_IAC34AT	0x00000001	/* Instr Addr 3-4 range Toggle */



#define dbcr_iac_range(task)	((task)->thread.dbcr1)

#define dbcr_iac_range(task)	((task)->thread.debug.dbcr1)

#define DBCR_IAC12I	DBCR1_IAC12M	/* Range Inclusive */

#define DBCR_IAC12X	DBCR1_IAC12MX	/* Range Exclusive */

#define DBCR_IAC12MODE	DBCR1_IAC12MX	/* IAC 1-2 Mode Bits */

arch/powerpc/kernel/asm-offsets.c

+1 −1
Original line number Diff line number Diff line
@@ -115,7 +115,7 @@ int main(void) 
#endif /* CONFIG_SPE */

#endif /* CONFIG_PPC64 */

#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)

	DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, dbcr0));

	DEFINE(THREAD_DBCR0, offsetof(struct thread_struct, debug.dbcr0));

#endif

#ifdef CONFIG_KVM_BOOK3S_32_HANDLER

	DEFINE(THREAD_KVM_SVCPU, offsetof(struct thread_struct, kvm_shadow_vcpu));

arch/powerpc/kernel/process.c

+21 −21
Original line number Diff line number Diff line
@@ -314,28 +314,28 @@ static DEFINE_PER_CPU(struct arch_hw_breakpoint, current_brk); 
 */

static void set_debug_reg_defaults(struct thread_struct *thread)

{

	thread->iac1 = thread->iac2 = 0;

	thread->debug.iac1 = thread->debug.iac2 = 0;

#if CONFIG_PPC_ADV_DEBUG_IACS > 2

	thread->iac3 = thread->iac4 = 0;

	thread->debug.iac3 = thread->debug.iac4 = 0;

#endif

	thread->dac1 = thread->dac2 = 0;

	thread->debug.dac1 = thread->debug.dac2 = 0;

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

	thread->dvc1 = thread->dvc2 = 0;

	thread->debug.dvc1 = thread->debug.dvc2 = 0;

#endif

	thread->dbcr0 = 0;

	thread->debug.dbcr0 = 0;

#ifdef CONFIG_BOOKE

	/*

	 * Force User/Supervisor bits to b11 (user-only MSR[PR]=1)

	 */

	thread->dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US |

	thread->debug.dbcr1 = DBCR1_IAC1US | DBCR1_IAC2US |

			DBCR1_IAC3US | DBCR1_IAC4US;

	/*

	 * Force Data Address Compare User/Supervisor bits to be User-only

	 * (0b11 MSR[PR]=1) and set all other bits in DBCR2 register to be 0.

	 */

	thread->dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;

	thread->debug.dbcr2 = DBCR2_DAC1US | DBCR2_DAC2US;

#else

	thread->dbcr1 = 0;

	thread->debug.dbcr1 = 0;

#endif

}
@@ -348,22 +348,22 @@ static void prime_debug_regs(struct thread_struct *thread) 
	 */

	mtmsr(mfmsr() & ~MSR_DE);



	mtspr(SPRN_IAC1, thread->iac1);

	mtspr(SPRN_IAC2, thread->iac2);

	mtspr(SPRN_IAC1, thread->debug.iac1);

	mtspr(SPRN_IAC2, thread->debug.iac2);

#if CONFIG_PPC_ADV_DEBUG_IACS > 2

	mtspr(SPRN_IAC3, thread->iac3);

	mtspr(SPRN_IAC4, thread->iac4);

	mtspr(SPRN_IAC3, thread->debug.iac3);

	mtspr(SPRN_IAC4, thread->debug.iac4);

#endif

	mtspr(SPRN_DAC1, thread->dac1);

	mtspr(SPRN_DAC2, thread->dac2);

	mtspr(SPRN_DAC1, thread->debug.dac1);

	mtspr(SPRN_DAC2, thread->debug.dac2);

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

	mtspr(SPRN_DVC1, thread->dvc1);

	mtspr(SPRN_DVC2, thread->dvc2);

	mtspr(SPRN_DVC1, thread->debug.dvc1);

	mtspr(SPRN_DVC2, thread->debug.dvc2);

#endif

	mtspr(SPRN_DBCR0, thread->dbcr0);

	mtspr(SPRN_DBCR1, thread->dbcr1);

	mtspr(SPRN_DBCR0, thread->debug.dbcr0);

	mtspr(SPRN_DBCR1, thread->debug.dbcr1);

#ifdef CONFIG_BOOKE

	mtspr(SPRN_DBCR2, thread->dbcr2);

	mtspr(SPRN_DBCR2, thread->debug.dbcr2);

#endif

}

/*
@@ -373,8 +373,8 @@ static void prime_debug_regs(struct thread_struct *thread) 
 */

static void switch_booke_debug_regs(struct thread_struct *new_thread)

{

	if ((current->thread.dbcr0 & DBCR0_IDM)

		|| (new_thread->dbcr0 & DBCR0_IDM))

	if ((current->thread.debug.dbcr0 & DBCR0_IDM)

		|| (new_thread->debug.dbcr0 & DBCR0_IDM))

			prime_debug_regs(new_thread);

}

#else	/* !CONFIG_PPC_ADV_DEBUG_REGS */

arch/powerpc/kernel/ptrace.c

+77 −77
Original line number Diff line number Diff line
@@ -855,8 +855,8 @@ void user_enable_single_step(struct task_struct *task) 


	if (regs != NULL) {

#ifdef CONFIG_PPC_ADV_DEBUG_REGS

		task->thread.dbcr0 &= ~DBCR0_BT;

		task->thread.dbcr0 |= DBCR0_IDM | DBCR0_IC;

		task->thread.debug.dbcr0 &= ~DBCR0_BT;

		task->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;

		regs->msr |= MSR_DE;

#else

		regs->msr &= ~MSR_BE;
@@ -872,8 +872,8 @@ void user_enable_block_step(struct task_struct *task) 


	if (regs != NULL) {

#ifdef CONFIG_PPC_ADV_DEBUG_REGS

		task->thread.dbcr0 &= ~DBCR0_IC;

		task->thread.dbcr0 = DBCR0_IDM | DBCR0_BT;

		task->thread.debug.dbcr0 &= ~DBCR0_IC;

		task->thread.debug.dbcr0 = DBCR0_IDM | DBCR0_BT;

		regs->msr |= MSR_DE;

#else

		regs->msr &= ~MSR_SE;
@@ -895,16 +895,16 @@ void user_disable_single_step(struct task_struct *task) 
		 * And, after doing so, if all debug flags are off, turn

		 * off DBCR0(IDM) and MSR(DE) .... Torez

		 */

		task->thread.dbcr0 &= ~DBCR0_IC;

		task->thread.debug.dbcr0 &= ~DBCR0_IC;

		/*

		 * Test to see if any of the DBCR_ACTIVE_EVENTS bits are set.

		 */

		if (!DBCR_ACTIVE_EVENTS(task->thread.dbcr0,

					task->thread.dbcr1)) {

		if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,

					task->thread.debug.dbcr1)) {

			/*

			 * All debug events were off.....

			 */

			task->thread.dbcr0 &= ~DBCR0_IDM;

			task->thread.debug.dbcr0 &= ~DBCR0_IDM;

			regs->msr &= ~MSR_DE;

		}

#else
@@ -1023,14 +1023,14 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, 
	 */



	/* DAC's hold the whole address without any mode flags */

	task->thread.dac1 = data & ~0x3UL;

	task->thread.debug.dac1 = data & ~0x3UL;



	if (task->thread.dac1 == 0) {

	if (task->thread.debug.dac1 == 0) {

		dbcr_dac(task) &= ~(DBCR_DAC1R | DBCR_DAC1W);

		if (!DBCR_ACTIVE_EVENTS(task->thread.dbcr0,

					task->thread.dbcr1)) {

		if (!DBCR_ACTIVE_EVENTS(task->thread.debug.dbcr0,

					task->thread.debug.dbcr1)) {

			task->thread.regs->msr &= ~MSR_DE;

			task->thread.dbcr0 &= ~DBCR0_IDM;

			task->thread.debug.dbcr0 &= ~DBCR0_IDM;

		}

		return 0;

	}
@@ -1042,7 +1042,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, 


	/* Set the Internal Debugging flag (IDM bit 1) for the DBCR0

	   register */

	task->thread.dbcr0 |= DBCR0_IDM;

	task->thread.debug.dbcr0 |= DBCR0_IDM;



	/* Check for write and read flags and set DBCR0

	   accordingly */
@@ -1072,10 +1072,10 @@ static long set_instruction_bp(struct task_struct *child, 
			      struct ppc_hw_breakpoint *bp_info)

{

	int slot;

	int slot1_in_use = ((child->thread.dbcr0 & DBCR0_IAC1) != 0);

	int slot2_in_use = ((child->thread.dbcr0 & DBCR0_IAC2) != 0);

	int slot3_in_use = ((child->thread.dbcr0 & DBCR0_IAC3) != 0);

	int slot4_in_use = ((child->thread.dbcr0 & DBCR0_IAC4) != 0);

	int slot1_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC1) != 0);

	int slot2_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC2) != 0);

	int slot3_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC3) != 0);

	int slot4_in_use = ((child->thread.debug.dbcr0 & DBCR0_IAC4) != 0);



	if (dbcr_iac_range(child) & DBCR_IAC12MODE)

		slot2_in_use = 1;
@@ -1094,9 +1094,9 @@ static long set_instruction_bp(struct task_struct *child, 
		/* We need a pair of IAC regsisters */

		if ((!slot1_in_use) && (!slot2_in_use)) {

			slot = 1;

			child->thread.iac1 = bp_info->addr;

			child->thread.iac2 = bp_info->addr2;

			child->thread.dbcr0 |= DBCR0_IAC1;

			child->thread.debug.iac1 = bp_info->addr;

			child->thread.debug.iac2 = bp_info->addr2;

			child->thread.debug.dbcr0 |= DBCR0_IAC1;

			if (bp_info->addr_mode ==

					PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)

				dbcr_iac_range(child) |= DBCR_IAC12X;
@@ -1105,9 +1105,9 @@ static long set_instruction_bp(struct task_struct *child, 
#if CONFIG_PPC_ADV_DEBUG_IACS > 2

		} else if ((!slot3_in_use) && (!slot4_in_use)) {

			slot = 3;

			child->thread.iac3 = bp_info->addr;

			child->thread.iac4 = bp_info->addr2;

			child->thread.dbcr0 |= DBCR0_IAC3;

			child->thread.debug.iac3 = bp_info->addr;

			child->thread.debug.iac4 = bp_info->addr2;

			child->thread.debug.dbcr0 |= DBCR0_IAC3;

			if (bp_info->addr_mode ==

					PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)

				dbcr_iac_range(child) |= DBCR_IAC34X;
@@ -1127,30 +1127,30 @@ static long set_instruction_bp(struct task_struct *child, 
			 */

			if (slot2_in_use || (slot3_in_use == slot4_in_use)) {

				slot = 1;

				child->thread.iac1 = bp_info->addr;

				child->thread.dbcr0 |= DBCR0_IAC1;

				child->thread.debug.iac1 = bp_info->addr;

				child->thread.debug.dbcr0 |= DBCR0_IAC1;

				goto out;

			}

		}

		if (!slot2_in_use) {

			slot = 2;

			child->thread.iac2 = bp_info->addr;

			child->thread.dbcr0 |= DBCR0_IAC2;

			child->thread.debug.iac2 = bp_info->addr;

			child->thread.debug.dbcr0 |= DBCR0_IAC2;

#if CONFIG_PPC_ADV_DEBUG_IACS > 2

		} else if (!slot3_in_use) {

			slot = 3;

			child->thread.iac3 = bp_info->addr;

			child->thread.dbcr0 |= DBCR0_IAC3;

			child->thread.debug.iac3 = bp_info->addr;

			child->thread.debug.dbcr0 |= DBCR0_IAC3;

		} else if (!slot4_in_use) {

			slot = 4;

			child->thread.iac4 = bp_info->addr;

			child->thread.dbcr0 |= DBCR0_IAC4;

			child->thread.debug.iac4 = bp_info->addr;

			child->thread.debug.dbcr0 |= DBCR0_IAC4;

#endif

		} else

			return -ENOSPC;

	}

out:

	child->thread.dbcr0 |= DBCR0_IDM;

	child->thread.debug.dbcr0 |= DBCR0_IDM;

	child->thread.regs->msr |= MSR_DE;



	return slot;
@@ -1160,49 +1160,49 @@ static int del_instruction_bp(struct task_struct *child, int slot) 
{

	switch (slot) {

	case 1:

		if ((child->thread.dbcr0 & DBCR0_IAC1) == 0)

		if ((child->thread.debug.dbcr0 & DBCR0_IAC1) == 0)

			return -ENOENT;



		if (dbcr_iac_range(child) & DBCR_IAC12MODE) {

			/* address range - clear slots 1 & 2 */

			child->thread.iac2 = 0;

			child->thread.debug.iac2 = 0;

			dbcr_iac_range(child) &= ~DBCR_IAC12MODE;

		}

		child->thread.iac1 = 0;

		child->thread.dbcr0 &= ~DBCR0_IAC1;

		child->thread.debug.iac1 = 0;

		child->thread.debug.dbcr0 &= ~DBCR0_IAC1;

		break;

	case 2:

		if ((child->thread.dbcr0 & DBCR0_IAC2) == 0)

		if ((child->thread.debug.dbcr0 & DBCR0_IAC2) == 0)

			return -ENOENT;



		if (dbcr_iac_range(child) & DBCR_IAC12MODE)

			/* used in a range */

			return -EINVAL;

		child->thread.iac2 = 0;

		child->thread.dbcr0 &= ~DBCR0_IAC2;

		child->thread.debug.iac2 = 0;

		child->thread.debug.dbcr0 &= ~DBCR0_IAC2;

		break;

#if CONFIG_PPC_ADV_DEBUG_IACS > 2

	case 3:

		if ((child->thread.dbcr0 & DBCR0_IAC3) == 0)

		if ((child->thread.debug.dbcr0 & DBCR0_IAC3) == 0)

			return -ENOENT;



		if (dbcr_iac_range(child) & DBCR_IAC34MODE) {

			/* address range - clear slots 3 & 4 */

			child->thread.iac4 = 0;

			child->thread.debug.iac4 = 0;

			dbcr_iac_range(child) &= ~DBCR_IAC34MODE;

		}

		child->thread.iac3 = 0;

		child->thread.dbcr0 &= ~DBCR0_IAC3;

		child->thread.debug.iac3 = 0;

		child->thread.debug.dbcr0 &= ~DBCR0_IAC3;

		break;

	case 4:

		if ((child->thread.dbcr0 & DBCR0_IAC4) == 0)

		if ((child->thread.debug.dbcr0 & DBCR0_IAC4) == 0)

			return -ENOENT;



		if (dbcr_iac_range(child) & DBCR_IAC34MODE)

			/* Used in a range */

			return -EINVAL;

		child->thread.iac4 = 0;

		child->thread.dbcr0 &= ~DBCR0_IAC4;

		child->thread.debug.iac4 = 0;

		child->thread.debug.dbcr0 &= ~DBCR0_IAC4;

		break;

#endif

	default:
@@ -1232,18 +1232,18 @@ static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info) 
			dbcr_dac(child) |= DBCR_DAC1R;

		if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)

			dbcr_dac(child) |= DBCR_DAC1W;

		child->thread.dac1 = (unsigned long)bp_info->addr;

		child->thread.debug.dac1 = (unsigned long)bp_info->addr;

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

		if (byte_enable) {

			child->thread.dvc1 =

			child->thread.debug.dvc1 =

				(unsigned long)bp_info->condition_value;

			child->thread.dbcr2 |=

			child->thread.debug.dbcr2 |=

				((byte_enable << DBCR2_DVC1BE_SHIFT) |

				 (condition_mode << DBCR2_DVC1M_SHIFT));

		}

#endif

#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE

	} else if (child->thread.dbcr2 & DBCR2_DAC12MODE) {

	} else if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {

		/* Both dac1 and dac2 are part of a range */

		return -ENOSPC;

#endif
@@ -1253,19 +1253,19 @@ static int set_dac(struct task_struct *child, struct ppc_hw_breakpoint *bp_info) 
			dbcr_dac(child) |= DBCR_DAC2R;

		if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)

			dbcr_dac(child) |= DBCR_DAC2W;

		child->thread.dac2 = (unsigned long)bp_info->addr;

		child->thread.debug.dac2 = (unsigned long)bp_info->addr;

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

		if (byte_enable) {

			child->thread.dvc2 =

			child->thread.debug.dvc2 =

				(unsigned long)bp_info->condition_value;

			child->thread.dbcr2 |=

			child->thread.debug.dbcr2 |=

				((byte_enable << DBCR2_DVC2BE_SHIFT) |

				 (condition_mode << DBCR2_DVC2M_SHIFT));

		}

#endif

	} else

		return -ENOSPC;

	child->thread.dbcr0 |= DBCR0_IDM;

	child->thread.debug.dbcr0 |= DBCR0_IDM;

	child->thread.regs->msr |= MSR_DE;



	return slot + 4;
@@ -1277,32 +1277,32 @@ static int del_dac(struct task_struct *child, int slot) 
		if ((dbcr_dac(child) & (DBCR_DAC1R | DBCR_DAC1W)) == 0)

			return -ENOENT;



		child->thread.dac1 = 0;

		child->thread.debug.dac1 = 0;

		dbcr_dac(child) &= ~(DBCR_DAC1R | DBCR_DAC1W);

#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE

		if (child->thread.dbcr2 & DBCR2_DAC12MODE) {

			child->thread.dac2 = 0;

			child->thread.dbcr2 &= ~DBCR2_DAC12MODE;

		if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE) {

			child->thread.debug.dac2 = 0;

			child->thread.debug.dbcr2 &= ~DBCR2_DAC12MODE;

		}

		child->thread.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);

		child->thread.debug.dbcr2 &= ~(DBCR2_DVC1M | DBCR2_DVC1BE);

#endif

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

		child->thread.dvc1 = 0;

		child->thread.debug.dvc1 = 0;

#endif

	} else if (slot == 2) {

		if ((dbcr_dac(child) & (DBCR_DAC2R | DBCR_DAC2W)) == 0)

			return -ENOENT;



#ifdef CONFIG_PPC_ADV_DEBUG_DAC_RANGE

		if (child->thread.dbcr2 & DBCR2_DAC12MODE)

		if (child->thread.debug.dbcr2 & DBCR2_DAC12MODE)

			/* Part of a range */

			return -EINVAL;

		child->thread.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);

		child->thread.debug.dbcr2 &= ~(DBCR2_DVC2M | DBCR2_DVC2BE);

#endif

#if CONFIG_PPC_ADV_DEBUG_DVCS > 0

		child->thread.dvc2 = 0;

		child->thread.debug.dvc2 = 0;

#endif

		child->thread.dac2 = 0;

		child->thread.debug.dac2 = 0;

		dbcr_dac(child) &= ~(DBCR_DAC2R | DBCR_DAC2W);

	} else

		return -EINVAL;
@@ -1344,22 +1344,22 @@ static int set_dac_range(struct task_struct *child, 
			return -EIO;

	}



	if (child->thread.dbcr0 &

	if (child->thread.debug.dbcr0 &

	    (DBCR0_DAC1R | DBCR0_DAC1W | DBCR0_DAC2R | DBCR0_DAC2W))

		return -ENOSPC;



	if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)

		child->thread.dbcr0 |= (DBCR0_DAC1R | DBCR0_IDM);

		child->thread.debug.dbcr0 |= (DBCR0_DAC1R | DBCR0_IDM);

	if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)

		child->thread.dbcr0 |= (DBCR0_DAC1W | DBCR0_IDM);

	child->thread.dac1 = bp_info->addr;

	child->thread.dac2 = bp_info->addr2;

		child->thread.debug.dbcr0 |= (DBCR0_DAC1W | DBCR0_IDM);

	child->thread.debug.dac1 = bp_info->addr;

	child->thread.debug.dac2 = bp_info->addr2;

	if (mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)

		child->thread.dbcr2  |= DBCR2_DAC12M;

		child->thread.debug.dbcr2  |= DBCR2_DAC12M;

	else if (mode == PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE)

		child->thread.dbcr2  |= DBCR2_DAC12MX;

		child->thread.debug.dbcr2  |= DBCR2_DAC12MX;

	else	/* PPC_BREAKPOINT_MODE_MASK */

		child->thread.dbcr2  |= DBCR2_DAC12MM;

		child->thread.debug.dbcr2  |= DBCR2_DAC12MM;

	child->thread.regs->msr |= MSR_DE;



	return 5;
@@ -1490,9 +1490,9 @@ static long ppc_del_hwdebug(struct task_struct *child, long data) 
		rc = del_dac(child, (int)data - 4);



	if (!rc) {

		if (!DBCR_ACTIVE_EVENTS(child->thread.dbcr0,

					child->thread.dbcr1)) {

			child->thread.dbcr0 &= ~DBCR0_IDM;

		if (!DBCR_ACTIVE_EVENTS(child->thread.debug.dbcr0,

					child->thread.debug.dbcr1)) {

			child->thread.debug.dbcr0 &= ~DBCR0_IDM;

			child->thread.regs->msr &= ~MSR_DE;

		}

	}
@@ -1670,7 +1670,7 @@ long arch_ptrace(struct task_struct *child, long request, 
		if (addr > 0)

			break;

#ifdef CONFIG_PPC_ADV_DEBUG_REGS

		ret = put_user(child->thread.dac1, datalp);

		ret = put_user(child->thread.debug.dac1, datalp);

#else

		dabr_fake = ((child->thread.hw_brk.address & (~HW_BRK_TYPE_DABR)) |

			     (child->thread.hw_brk.type & HW_BRK_TYPE_DABR));