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Commit 5b61d4a5 authored by Christopher Covington's avatar Christopher Covington Committed by Russell King
Browse files

ARM: 7948/1: hw_breakpoint: Add ARMv8 support 



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

Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarChristopher Covington <cov@codeaurora.org>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 889f172d

arch/arm/include/asm/hw_breakpoint.h

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/arm/kernel/hw_breakpoint.c

+2 −1
Original line number Diff line number Diff line
@@ -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;