[Qemu-devel] [PATCH v8 10/27] target-arm: add NSACR register

[Greg Bellows]

From: Fabian Aggeler <address@hidden>

Implements NSACR register with corresponding read/write functions
for ARMv7 and ARMv8.

Signed-off-by: Sergey Fedorov <address@hidden>
Signed-off-by: Fabian Aggeler <address@hidden>
Signed-off-by: Greg Bellows <address@hidden>

---

v7 -> v8
- Update naming from c1_nsacr to nsacr to match other registers being changed.
- Remove NSACR read/write functions

v4 -> v5
- Changed to use renamed arm_current_el()
---
 target-arm/cpu.h    | 6 ++++++
 target-arm/helper.c | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 6bb7d39..88e22fb 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -181,6 +181,7 @@ typedef struct CPUARMState {
         uint64_t c1_sys; /* System control register.  */
         uint64_t c1_coproc; /* Coprocessor access register.  */
         uint32_t c1_xscaleauxcr; /* XScale auxiliary control register.  */
+        uint32_t nsacr; /* Non-secure access control register. */
         uint64_t ttbr0_el1; /* MMU translation table base 0. */
         uint64_t ttbr1_el1; /* MMU translation table base 1. */
         uint64_t c2_control; /* MMU translation table base control.  */
@@ -634,6 +635,11 @@ static inline void xpsr_write(CPUARMState *env, uint32_t 
val, uint32_t mask)
 #define SCR_AARCH32_MASK      (0x3fff & ~(SCR_RW | SCR_ST))
 #define SCR_AARCH64_MASK      (0x3fff & ~SCR_NET)
 
+#define NSACR_NSTRCDIS (1U << 20)
+#define NSACR_RFR      (1U << 19)
+#define NSACR_NSASEDIS (1U << 15)
+#define NSACR_NSD32DIS (1U << 14)
+
 /* Return the current FPSCR value.  */
 uint32_t vfp_get_fpscr(CPUARMState *env);
 void vfp_set_fpscr(CPUARMState *env, uint32_t val);
diff --git a/target-arm/helper.c b/target-arm/helper.c
index e73756d..3c12eb3 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -2344,6 +2344,9 @@ static const ARMCPRegInfo el3_cp_reginfo[] = {
       .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
       .access = PL3_RW, .resetvalue = 0, .writefn = scr_write,
       .fieldoffset = offsetoflow32(CPUARMState, cp15.scr_el3) },
+    { .name = "NSACR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 2,
+      .access = PL3_RW | PL1_R, .resetvalue = 0,
+      .fieldoffset = offsetof(CPUARMState, cp15.nsacr) },
     REGINFO_SENTINEL
 };
 
-- 
1.8.3.2