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powerpc/booke: Introduce new CONFIG options for advanced debug registers

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powerpc/booke: Introduce new CONFIG options for advanced debug registers

From: Dave Kleikamp <shaggy@linux.vnet.ibm.com>

Introduce new config options to simplify the ifdefs pertaining to the
advanced debug registers for booke and 40x processors:

CONFIG_PPC_ADV_DEBUG_REGS - boolean: true for dac-based processors
CONFIG_PPC_ADV_DEBUG_IACS - number of IAC registers
CONFIG_PPC_ADV_DEBUG_DACS - number of DAC registers
CONFIG_PPC_ADV_DEBUG_DVCS - number of DVC registers
CONFIG_PPC_ADV_DEBUG_DAC_RANGE - DAC ranges supported

Beginning conservatively, since I only have the facilities to test 440
hardware.  I believe all 40x and booke platforms support at least 2 IAC
and 2 DAC registers.  For 440, 4 IAC and 2 DVC registers are enabled, as
well as the DAC ranges.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Acked-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Dave Kleikamp
2010-02-08 11:50:57 +00:00
committed by Benjamin Herrenschmidt
parent 789c299ca2
commit 172ae2e7f8
8 changed files with 50 additions and 27 deletions
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8
arch/powerpc/kernel/signal_32.c
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@@ -1078,7 +1078,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
int i;
unsigned char tmp;
unsigned long new_msr = regs->msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
unsigned long new_dbcr0 = current->thread.dbcr0;
#endif
@@ -1087,7 +1087,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
return -EFAULT;
switch (op.dbg_type) {
case SIG_DBG_SINGLE_STEPPING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
if (op.dbg_value) {
new_msr |= MSR_DE;
new_dbcr0 |= (DBCR0_IDM | DBCR0_IC);
@@ -1103,7 +1103,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
#endif
break;
case SIG_DBG_BRANCH_TRACING:
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
return -EINVAL;
#else
if (op.dbg_value)
@@ -1124,7 +1124,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
failure is a problem, anyway, and it's very unlikely unless
the user is really doing something wrong. */
regs->msr = new_msr;
#if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
current->thread.dbcr0 = new_dbcr0;
#endif