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ARM: 7948/1: hw_breakpoint: Add ARMv8 support

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Add the trivial support necessary to get hardware breakpoints
working for GDB on ARMv8 simulators running in AArch32 mode.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Christopher Covington 2014-01-29 22:01:31 +01:00 committed by Russell King
parent 889f172d92
commit 5b61d4a5d6
2 changed files with 3 additions and 1 deletions
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1
arch/arm/include/asm/hw_breakpoint.h
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@ -51,6 +51,7 @@ static inline void decode_ctrl_reg(u32 reg,
#define ARM_DEBUG_ARCH_V7_ECP14 3
#define ARM_DEBUG_ARCH_V7_MM 4
#define ARM_DEBUG_ARCH_V7_1 5
#define ARM_DEBUG_ARCH_V8 6
/* Breakpoint */
#define ARM_BREAKPOINT_EXECUTE 0

3
arch/arm/kernel/hw_breakpoint.c
View File

@ -167,7 +167,7 @@ static int debug_arch_supported(void)
/* Can we determine the watchpoint access type from the fsr? */
static int debug_exception_updates_fsr(void)
{
return 0;
return get_debug_arch() >= ARM_DEBUG_ARCH_V8;
}
/* Determine number of WRP registers available. */
@ -257,6 +257,7 @@ static int enable_monitor_mode(void)
break;
case ARM_DEBUG_ARCH_V7_ECP14:
case ARM_DEBUG_ARCH_V7_1:
case ARM_DEBUG_ARCH_V8:
ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN));
isb();
break;