From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58787) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XFj7v-0001P1-82 for qemu-devel@nongnu.org; Fri, 08 Aug 2014 08:18:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XFj7n-0007GX-0Y for qemu-devel@nongnu.org; Fri, 08 Aug 2014 08:18:31 -0400 Received: from mnementh.archaic.org.uk ([2001:8b0:1d0::1]:48924) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XFj7m-0007Fb-Px for qemu-devel@nongnu.org; Fri, 08 Aug 2014 08:18:22 -0400 From: Peter Maydell Date: Fri, 8 Aug 2014 13:18:05 +0100 Message-Id: <1407500294-10804-3-git-send-email-peter.maydell@linaro.org> In-Reply-To: <1407500294-10804-1-git-send-email-peter.maydell@linaro.org> References: <1407500294-10804-1-git-send-email-peter.maydell@linaro.org> Subject: [Qemu-devel] [PATCH 02/11] target-arm: Allow STATE_BOTH reginfo descriptions for more than cp14 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: David Long Currently the STATE_BOTH shorthand for allowing a single reginfo struct to define handling for both AArch32 and AArch64 views of a register only permits this where the AArch32 view is in cp15. It turns out that the debug registers in cp14 also have neatly lined up encodings; allow these also to share reginfo structs by permitting a STATE_BOTH reginfo to specify the .cp field (and continue to default to 15 if it is not specified). Signed-off-by: Peter Maydell --- target-arm/helper.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/target-arm/helper.c b/target-arm/helper.c index a9be7ba..8239aea 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2800,9 +2800,11 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r, /* The AArch32 view of a shared register sees the lower 32 bits * of a 64 bit backing field. It is not migratable as the AArch64 * view handles that. AArch64 also handles reset. - * We assume it is a cp15 register. + * We assume it is a cp15 register if the .cp field is left unset. */ - r2->cp = 15; + if (r2->cp == 0) { + r2->cp = 15; + } r2->type |= ARM_CP_NO_MIGRATE; r2->resetfn = arm_cp_reset_ignore; #ifdef HOST_WORDS_BIGENDIAN @@ -2815,8 +2817,11 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r, /* To allow abbreviation of ARMCPRegInfo * definitions, we treat cp == 0 as equivalent to * the value for "standard guest-visible sysreg". + * STATE_BOTH definitions are also always "standard + * sysreg" in their AArch64 view (the .cp value may + * be non-zero for the benefit of the AArch32 view). */ - if (r->cp == 0) { + if (r->cp == 0 || r->state == ARM_CP_STATE_BOTH) { r2->cp = CP_REG_ARM64_SYSREG_CP; } *key = ENCODE_AA64_CP_REG(r2->cp, r2->crn, crm, -- 1.9.1