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target-arm: Add SCR_EL3

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1411718914-6608-3-git-send-email-edgar.iglesias@gmail.com
[PMM: apply offsetoflow32() to correct regdef]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2014-09-29 18:48:49 +01:00 committed by Peter Maydell
parent f149e3e847
commit 64e0e2de0c
2 changed files with 51 additions and 3 deletions
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19
target-arm/cpu.h
View File

@ -172,7 +172,6 @@ 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 c1_scr; /* secure config 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. */
@ -185,6 +184,7 @@ typedef struct CPUARMState {
uint32_t pmsav5_data_ap; /* PMSAv5 MPU data access permissions */
uint32_t pmsav5_insn_ap; /* PMSAv5 MPU insn access permissions */
uint64_t hcr_el2; /* Hypervisor configuration register */
uint64_t scr_el3; /* Secure configuration register. */
uint32_t ifsr_el2; /* Fault status registers. */
uint64_t esr_el[4];
uint32_t c6_region[8]; /* MPU base/size registers. */
@ -602,6 +602,23 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
#define HCR_ID (1ULL << 33)
#define HCR_MASK ((1ULL << 34) - 1)
#define SCR_NS (1U << 0)
#define SCR_IRQ (1U << 1)
#define SCR_FIQ (1U << 2)
#define SCR_EA (1U << 3)
#define SCR_FW (1U << 4)
#define SCR_AW (1U << 5)
#define SCR_NET (1U << 6)
#define SCR_SMD (1U << 7)
#define SCR_HCE (1U << 8)
#define SCR_SIF (1U << 9)
#define SCR_RW (1U << 10)
#define SCR_ST (1U << 11)
#define SCR_TWI (1U << 12)
#define SCR_TWE (1U << 13)
#define SCR_AARCH32_MASK (0x3fff & ~(SCR_RW | SCR_ST))
#define SCR_AARCH64_MASK (0x3fff & ~SCR_NET)
/* Return the current FPSCR value. */
uint32_t vfp_get_fpscr(CPUARMState *env);
void vfp_set_fpscr(CPUARMState *env, uint32_t val);

35
target-arm/helper.c
View File

@ -747,6 +747,32 @@ static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
raw_write(env, ri, value & ~0x1FULL);
}
static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
/* We only mask off bits that are RES0 both for AArch64 and AArch32.
* For bits that vary between AArch32/64, code needs to check the
* current execution mode before directly using the feature bit.
*/
uint32_t valid_mask = SCR_AARCH64_MASK | SCR_AARCH32_MASK;
if (!arm_feature(env, ARM_FEATURE_EL2)) {
valid_mask &= ~SCR_HCE;
/* On ARMv7, SMD (or SCD as it is called in v7) is only
* supported if EL2 exists. The bit is UNK/SBZP when
* EL2 is unavailable. In QEMU ARMv7, we force it to always zero
* when EL2 is unavailable.
*/
if (arm_feature(env, ARM_FEATURE_V7)) {
valid_mask &= ~SCR_SMD;
}
}
/* Clear all-context RES0 bits. */
value &= valid_mask;
raw_write(env, ri, value);
}
static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = arm_env_get_cpu(env);
@ -873,8 +899,8 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
.fieldoffset = offsetof(CPUARMState, cp15.vbar_el[1]),
.resetvalue = 0 },
{ .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
.resetvalue = 0, },
.access = PL1_RW, .fieldoffset = offsetoflow32(CPUARMState, cp15.scr_el3),
.resetvalue = 0, .writefn = scr_write },
{ .name = "CCSIDR", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
.access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
@ -2309,6 +2335,11 @@ static const ARMCPRegInfo v8_el3_cp_reginfo[] = {
.access = PL3_RW, .writefn = vbar_write,
.fieldoffset = offsetof(CPUARMState, cp15.vbar_el[3]),
.resetvalue = 0 },
{ .name = "SCR_EL3", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_NO_MIGRATE,
.opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 0,
.access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.scr_el3),
.writefn = scr_write },
REGINFO_SENTINEL
};