This also makes sure that we get the correct ordering of SVE vs FP exceptions. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20180211205848.4568-5-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
767 lines
24 KiB
C
767 lines
24 KiB
C
/*
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* QEMU ARM CPU -- internal functions and types
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*
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* Copyright (c) 2014 Linaro Ltd
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This header defines functions, types, etc which need to be shared
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* between different source files within target/arm/ but which are
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* private to it and not required by the rest of QEMU.
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*/
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#ifndef TARGET_ARM_INTERNALS_H
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#define TARGET_ARM_INTERNALS_H
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#include "hw/registerfields.h"
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/* register banks for CPU modes */
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#define BANK_USRSYS 0
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#define BANK_SVC 1
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#define BANK_ABT 2
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#define BANK_UND 3
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#define BANK_IRQ 4
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#define BANK_FIQ 5
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#define BANK_HYP 6
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#define BANK_MON 7
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static inline bool excp_is_internal(int excp)
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{
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/* Return true if this exception number represents a QEMU-internal
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* exception that will not be passed to the guest.
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*/
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return excp == EXCP_INTERRUPT
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|| excp == EXCP_HLT
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|| excp == EXCP_DEBUG
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|| excp == EXCP_HALTED
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|| excp == EXCP_EXCEPTION_EXIT
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|| excp == EXCP_KERNEL_TRAP
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|| excp == EXCP_SEMIHOST;
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}
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/* Scale factor for generic timers, ie number of ns per tick.
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* This gives a 62.5MHz timer.
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*/
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#define GTIMER_SCALE 16
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/* Bit definitions for the v7M CONTROL register */
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FIELD(V7M_CONTROL, NPRIV, 0, 1)
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FIELD(V7M_CONTROL, SPSEL, 1, 1)
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FIELD(V7M_CONTROL, FPCA, 2, 1)
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FIELD(V7M_CONTROL, SFPA, 3, 1)
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/* Bit definitions for v7M exception return payload */
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FIELD(V7M_EXCRET, ES, 0, 1)
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FIELD(V7M_EXCRET, RES0, 1, 1)
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FIELD(V7M_EXCRET, SPSEL, 2, 1)
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FIELD(V7M_EXCRET, MODE, 3, 1)
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FIELD(V7M_EXCRET, FTYPE, 4, 1)
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FIELD(V7M_EXCRET, DCRS, 5, 1)
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FIELD(V7M_EXCRET, S, 6, 1)
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FIELD(V7M_EXCRET, RES1, 7, 25) /* including the must-be-1 prefix */
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/* Minimum value which is a magic number for exception return */
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#define EXC_RETURN_MIN_MAGIC 0xff000000
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/* Minimum number which is a magic number for function or exception return
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* when using v8M security extension
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*/
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#define FNC_RETURN_MIN_MAGIC 0xfefffffe
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/* We use a few fake FSR values for internal purposes in M profile.
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* M profile cores don't have A/R format FSRs, but currently our
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* get_phys_addr() code assumes A/R profile and reports failures via
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* an A/R format FSR value. We then translate that into the proper
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* M profile exception and FSR status bit in arm_v7m_cpu_do_interrupt().
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* Mostly the FSR values we use for this are those defined for v7PMSA,
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* since we share some of that codepath. A few kinds of fault are
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* only for M profile and have no A/R equivalent, though, so we have
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* to pick a value from the reserved range (which we never otherwise
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* generate) to use for these.
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* These values will never be visible to the guest.
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*/
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#define M_FAKE_FSR_NSC_EXEC 0xf /* NS executing in S&NSC memory */
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#define M_FAKE_FSR_SFAULT 0xe /* SecureFault INVTRAN, INVEP or AUVIOL */
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/*
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* For AArch64, map a given EL to an index in the banked_spsr array.
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* Note that this mapping and the AArch32 mapping defined in bank_number()
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* must agree such that the AArch64<->AArch32 SPSRs have the architecturally
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* mandated mapping between each other.
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*/
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static inline unsigned int aarch64_banked_spsr_index(unsigned int el)
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{
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static const unsigned int map[4] = {
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[1] = BANK_SVC, /* EL1. */
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[2] = BANK_HYP, /* EL2. */
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[3] = BANK_MON, /* EL3. */
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};
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assert(el >= 1 && el <= 3);
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return map[el];
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}
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/* Map CPU modes onto saved register banks. */
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static inline int bank_number(int mode)
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{
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switch (mode) {
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case ARM_CPU_MODE_USR:
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case ARM_CPU_MODE_SYS:
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return BANK_USRSYS;
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case ARM_CPU_MODE_SVC:
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return BANK_SVC;
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case ARM_CPU_MODE_ABT:
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return BANK_ABT;
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case ARM_CPU_MODE_UND:
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return BANK_UND;
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case ARM_CPU_MODE_IRQ:
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return BANK_IRQ;
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case ARM_CPU_MODE_FIQ:
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return BANK_FIQ;
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case ARM_CPU_MODE_HYP:
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return BANK_HYP;
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case ARM_CPU_MODE_MON:
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return BANK_MON;
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}
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g_assert_not_reached();
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}
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void switch_mode(CPUARMState *, int);
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void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu);
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void arm_translate_init(void);
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enum arm_fprounding {
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FPROUNDING_TIEEVEN,
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FPROUNDING_POSINF,
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FPROUNDING_NEGINF,
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FPROUNDING_ZERO,
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FPROUNDING_TIEAWAY,
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FPROUNDING_ODD
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};
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int arm_rmode_to_sf(int rmode);
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static inline void aarch64_save_sp(CPUARMState *env, int el)
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{
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if (env->pstate & PSTATE_SP) {
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env->sp_el[el] = env->xregs[31];
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} else {
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env->sp_el[0] = env->xregs[31];
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}
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}
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static inline void aarch64_restore_sp(CPUARMState *env, int el)
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{
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if (env->pstate & PSTATE_SP) {
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env->xregs[31] = env->sp_el[el];
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} else {
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env->xregs[31] = env->sp_el[0];
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}
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}
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static inline void update_spsel(CPUARMState *env, uint32_t imm)
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{
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unsigned int cur_el = arm_current_el(env);
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/* Update PSTATE SPSel bit; this requires us to update the
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* working stack pointer in xregs[31].
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*/
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if (!((imm ^ env->pstate) & PSTATE_SP)) {
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return;
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}
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aarch64_save_sp(env, cur_el);
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env->pstate = deposit32(env->pstate, 0, 1, imm);
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/* We rely on illegal updates to SPsel from EL0 to get trapped
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* at translation time.
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*/
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assert(cur_el >= 1 && cur_el <= 3);
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aarch64_restore_sp(env, cur_el);
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}
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/*
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* arm_pamax
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* @cpu: ARMCPU
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*
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* Returns the implementation defined bit-width of physical addresses.
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* The ARMv8 reference manuals refer to this as PAMax().
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*/
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static inline unsigned int arm_pamax(ARMCPU *cpu)
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{
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static const unsigned int pamax_map[] = {
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[0] = 32,
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[1] = 36,
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[2] = 40,
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[3] = 42,
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[4] = 44,
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[5] = 48,
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};
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unsigned int parange = extract32(cpu->id_aa64mmfr0, 0, 4);
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/* id_aa64mmfr0 is a read-only register so values outside of the
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* supported mappings can be considered an implementation error. */
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assert(parange < ARRAY_SIZE(pamax_map));
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return pamax_map[parange];
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}
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/* Return true if extended addresses are enabled.
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* This is always the case if our translation regime is 64 bit,
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* but depends on TTBCR.EAE for 32 bit.
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*/
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static inline bool extended_addresses_enabled(CPUARMState *env)
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{
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TCR *tcr = &env->cp15.tcr_el[arm_is_secure(env) ? 3 : 1];
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return arm_el_is_aa64(env, 1) ||
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(arm_feature(env, ARM_FEATURE_LPAE) && (tcr->raw_tcr & TTBCR_EAE));
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}
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/* Valid Syndrome Register EC field values */
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enum arm_exception_class {
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EC_UNCATEGORIZED = 0x00,
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EC_WFX_TRAP = 0x01,
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EC_CP15RTTRAP = 0x03,
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EC_CP15RRTTRAP = 0x04,
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EC_CP14RTTRAP = 0x05,
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EC_CP14DTTRAP = 0x06,
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EC_ADVSIMDFPACCESSTRAP = 0x07,
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EC_FPIDTRAP = 0x08,
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EC_CP14RRTTRAP = 0x0c,
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EC_ILLEGALSTATE = 0x0e,
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EC_AA32_SVC = 0x11,
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EC_AA32_HVC = 0x12,
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EC_AA32_SMC = 0x13,
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EC_AA64_SVC = 0x15,
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EC_AA64_HVC = 0x16,
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EC_AA64_SMC = 0x17,
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EC_SYSTEMREGISTERTRAP = 0x18,
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EC_SVEACCESSTRAP = 0x19,
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EC_INSNABORT = 0x20,
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EC_INSNABORT_SAME_EL = 0x21,
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EC_PCALIGNMENT = 0x22,
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EC_DATAABORT = 0x24,
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EC_DATAABORT_SAME_EL = 0x25,
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EC_SPALIGNMENT = 0x26,
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EC_AA32_FPTRAP = 0x28,
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EC_AA64_FPTRAP = 0x2c,
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EC_SERROR = 0x2f,
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EC_BREAKPOINT = 0x30,
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EC_BREAKPOINT_SAME_EL = 0x31,
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EC_SOFTWARESTEP = 0x32,
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EC_SOFTWARESTEP_SAME_EL = 0x33,
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EC_WATCHPOINT = 0x34,
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EC_WATCHPOINT_SAME_EL = 0x35,
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EC_AA32_BKPT = 0x38,
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EC_VECTORCATCH = 0x3a,
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EC_AA64_BKPT = 0x3c,
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};
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#define ARM_EL_EC_SHIFT 26
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#define ARM_EL_IL_SHIFT 25
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#define ARM_EL_ISV_SHIFT 24
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#define ARM_EL_IL (1 << ARM_EL_IL_SHIFT)
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#define ARM_EL_ISV (1 << ARM_EL_ISV_SHIFT)
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/* Utility functions for constructing various kinds of syndrome value.
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* Note that in general we follow the AArch64 syndrome values; in a
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* few cases the value in HSR for exceptions taken to AArch32 Hyp
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* mode differs slightly, so if we ever implemented Hyp mode then the
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* syndrome value would need some massaging on exception entry.
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* (One example of this is that AArch64 defaults to IL bit set for
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* exceptions which don't specifically indicate information about the
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* trapping instruction, whereas AArch32 defaults to IL bit clear.)
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*/
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static inline uint32_t syn_uncategorized(void)
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{
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return (EC_UNCATEGORIZED << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_aa64_svc(uint32_t imm16)
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{
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return (EC_AA64_SVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa64_hvc(uint32_t imm16)
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{
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return (EC_AA64_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa64_smc(uint32_t imm16)
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{
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return (EC_AA64_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_16bit)
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{
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return (EC_AA32_SVC << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
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| (is_16bit ? 0 : ARM_EL_IL);
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}
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static inline uint32_t syn_aa32_hvc(uint32_t imm16)
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{
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return (EC_AA32_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_smc(void)
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{
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return (EC_AA32_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_aa64_bkpt(uint32_t imm16)
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{
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return (EC_AA64_BKPT << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_16bit)
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{
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return (EC_AA32_BKPT << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
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| (is_16bit ? 0 : ARM_EL_IL);
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}
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static inline uint32_t syn_aa64_sysregtrap(int op0, int op1, int op2,
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int crn, int crm, int rt,
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int isread)
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{
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return (EC_SYSTEMREGISTERTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL
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| (op0 << 20) | (op2 << 17) | (op1 << 14) | (crn << 10) | (rt << 5)
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| (crm << 1) | isread;
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}
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static inline uint32_t syn_cp14_rt_trap(int cv, int cond, int opc1, int opc2,
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int crn, int crm, int rt, int isread,
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bool is_16bit)
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{
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return (EC_CP14RTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
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| (crn << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp15_rt_trap(int cv, int cond, int opc1, int opc2,
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int crn, int crm, int rt, int isread,
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bool is_16bit)
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{
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return (EC_CP15RTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
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| (crn << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp14_rrt_trap(int cv, int cond, int opc1, int crm,
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int rt, int rt2, int isread,
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bool is_16bit)
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{
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return (EC_CP14RRTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc1 << 16)
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| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
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int rt, int rt2, int isread,
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bool is_16bit)
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{
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return (EC_CP15RRTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc1 << 16)
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| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_16bit)
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{
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return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20);
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}
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static inline uint32_t syn_sve_access_trap(void)
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{
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return EC_SVEACCESSTRAP << ARM_EL_EC_SHIFT;
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}
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static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
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{
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return (EC_INSNABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (ea << 9) | (s1ptw << 7) | fsc;
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}
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static inline uint32_t syn_data_abort_no_iss(int same_el,
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int ea, int cm, int s1ptw,
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int wnr, int fsc)
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{
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return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL
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| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
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}
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static inline uint32_t syn_data_abort_with_iss(int same_el,
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int sas, int sse, int srt,
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int sf, int ar,
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int ea, int cm, int s1ptw,
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int wnr, int fsc,
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bool is_16bit)
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{
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return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| ARM_EL_ISV | (sas << 22) | (sse << 21) | (srt << 16)
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| (sf << 15) | (ar << 14)
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| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
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}
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static inline uint32_t syn_swstep(int same_el, int isv, int ex)
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{
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return (EC_SOFTWARESTEP << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (isv << 24) | (ex << 6) | 0x22;
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}
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static inline uint32_t syn_watchpoint(int same_el, int cm, int wnr)
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{
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return (EC_WATCHPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (cm << 8) | (wnr << 6) | 0x22;
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}
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static inline uint32_t syn_breakpoint(int same_el)
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{
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return (EC_BREAKPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | 0x22;
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}
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static inline uint32_t syn_wfx(int cv, int cond, int ti, bool is_16bit)
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{
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return (EC_WFX_TRAP << ARM_EL_EC_SHIFT) |
|
|
(is_16bit ? 0 : (1 << ARM_EL_IL_SHIFT)) |
|
|
(cv << 24) | (cond << 20) | ti;
|
|
}
|
|
|
|
/* Update a QEMU watchpoint based on the information the guest has set in the
|
|
* DBGWCR<n>_EL1 and DBGWVR<n>_EL1 registers.
|
|
*/
|
|
void hw_watchpoint_update(ARMCPU *cpu, int n);
|
|
/* Update the QEMU watchpoints for every guest watchpoint. This does a
|
|
* complete delete-and-reinstate of the QEMU watchpoint list and so is
|
|
* suitable for use after migration or on reset.
|
|
*/
|
|
void hw_watchpoint_update_all(ARMCPU *cpu);
|
|
/* Update a QEMU breakpoint based on the information the guest has set in the
|
|
* DBGBCR<n>_EL1 and DBGBVR<n>_EL1 registers.
|
|
*/
|
|
void hw_breakpoint_update(ARMCPU *cpu, int n);
|
|
/* Update the QEMU breakpoints for every guest breakpoint. This does a
|
|
* complete delete-and-reinstate of the QEMU breakpoint list and so is
|
|
* suitable for use after migration or on reset.
|
|
*/
|
|
void hw_breakpoint_update_all(ARMCPU *cpu);
|
|
|
|
/* Callback function for checking if a watchpoint should trigger. */
|
|
bool arm_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp);
|
|
|
|
/* Adjust addresses (in BE32 mode) before testing against watchpoint
|
|
* addresses.
|
|
*/
|
|
vaddr arm_adjust_watchpoint_address(CPUState *cs, vaddr addr, int len);
|
|
|
|
/* Callback function for when a watchpoint or breakpoint triggers. */
|
|
void arm_debug_excp_handler(CPUState *cs);
|
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
static inline bool arm_is_psci_call(ARMCPU *cpu, int excp_type)
|
|
{
|
|
return false;
|
|
}
|
|
#else
|
|
/* Return true if the r0/x0 value indicates that this SMC/HVC is a PSCI call. */
|
|
bool arm_is_psci_call(ARMCPU *cpu, int excp_type);
|
|
/* Actually handle a PSCI call */
|
|
void arm_handle_psci_call(ARMCPU *cpu);
|
|
#endif
|
|
|
|
/**
|
|
* arm_clear_exclusive: clear the exclusive monitor
|
|
* @env: CPU env
|
|
* Clear the CPU's exclusive monitor, like the guest CLREX instruction.
|
|
*/
|
|
static inline void arm_clear_exclusive(CPUARMState *env)
|
|
{
|
|
env->exclusive_addr = -1;
|
|
}
|
|
|
|
/**
|
|
* ARMFaultType: type of an ARM MMU fault
|
|
* This corresponds to the v8A pseudocode's Fault enumeration,
|
|
* with extensions for QEMU internal conditions.
|
|
*/
|
|
typedef enum ARMFaultType {
|
|
ARMFault_None,
|
|
ARMFault_AccessFlag,
|
|
ARMFault_Alignment,
|
|
ARMFault_Background,
|
|
ARMFault_Domain,
|
|
ARMFault_Permission,
|
|
ARMFault_Translation,
|
|
ARMFault_AddressSize,
|
|
ARMFault_SyncExternal,
|
|
ARMFault_SyncExternalOnWalk,
|
|
ARMFault_SyncParity,
|
|
ARMFault_SyncParityOnWalk,
|
|
ARMFault_AsyncParity,
|
|
ARMFault_AsyncExternal,
|
|
ARMFault_Debug,
|
|
ARMFault_TLBConflict,
|
|
ARMFault_Lockdown,
|
|
ARMFault_Exclusive,
|
|
ARMFault_ICacheMaint,
|
|
ARMFault_QEMU_NSCExec, /* v8M: NS executing in S&NSC memory */
|
|
ARMFault_QEMU_SFault, /* v8M: SecureFault INVTRAN, INVEP or AUVIOL */
|
|
} ARMFaultType;
|
|
|
|
/**
|
|
* ARMMMUFaultInfo: Information describing an ARM MMU Fault
|
|
* @type: Type of fault
|
|
* @level: Table walk level (for translation, access flag and permission faults)
|
|
* @domain: Domain of the fault address (for non-LPAE CPUs only)
|
|
* @s2addr: Address that caused a fault at stage 2
|
|
* @stage2: True if we faulted at stage 2
|
|
* @s1ptw: True if we faulted at stage 2 while doing a stage 1 page-table walk
|
|
* @ea: True if we should set the EA (external abort type) bit in syndrome
|
|
*/
|
|
typedef struct ARMMMUFaultInfo ARMMMUFaultInfo;
|
|
struct ARMMMUFaultInfo {
|
|
ARMFaultType type;
|
|
target_ulong s2addr;
|
|
int level;
|
|
int domain;
|
|
bool stage2;
|
|
bool s1ptw;
|
|
bool ea;
|
|
};
|
|
|
|
/**
|
|
* arm_fi_to_sfsc: Convert fault info struct to short-format FSC
|
|
* Compare pseudocode EncodeSDFSC(), though unlike that function
|
|
* we set up a whole FSR-format code including domain field and
|
|
* putting the high bit of the FSC into bit 10.
|
|
*/
|
|
static inline uint32_t arm_fi_to_sfsc(ARMMMUFaultInfo *fi)
|
|
{
|
|
uint32_t fsc;
|
|
|
|
switch (fi->type) {
|
|
case ARMFault_None:
|
|
return 0;
|
|
case ARMFault_AccessFlag:
|
|
fsc = fi->level == 1 ? 0x3 : 0x6;
|
|
break;
|
|
case ARMFault_Alignment:
|
|
fsc = 0x1;
|
|
break;
|
|
case ARMFault_Permission:
|
|
fsc = fi->level == 1 ? 0xd : 0xf;
|
|
break;
|
|
case ARMFault_Domain:
|
|
fsc = fi->level == 1 ? 0x9 : 0xb;
|
|
break;
|
|
case ARMFault_Translation:
|
|
fsc = fi->level == 1 ? 0x5 : 0x7;
|
|
break;
|
|
case ARMFault_SyncExternal:
|
|
fsc = 0x8 | (fi->ea << 12);
|
|
break;
|
|
case ARMFault_SyncExternalOnWalk:
|
|
fsc = fi->level == 1 ? 0xc : 0xe;
|
|
fsc |= (fi->ea << 12);
|
|
break;
|
|
case ARMFault_SyncParity:
|
|
fsc = 0x409;
|
|
break;
|
|
case ARMFault_SyncParityOnWalk:
|
|
fsc = fi->level == 1 ? 0x40c : 0x40e;
|
|
break;
|
|
case ARMFault_AsyncParity:
|
|
fsc = 0x408;
|
|
break;
|
|
case ARMFault_AsyncExternal:
|
|
fsc = 0x406 | (fi->ea << 12);
|
|
break;
|
|
case ARMFault_Debug:
|
|
fsc = 0x2;
|
|
break;
|
|
case ARMFault_TLBConflict:
|
|
fsc = 0x400;
|
|
break;
|
|
case ARMFault_Lockdown:
|
|
fsc = 0x404;
|
|
break;
|
|
case ARMFault_Exclusive:
|
|
fsc = 0x405;
|
|
break;
|
|
case ARMFault_ICacheMaint:
|
|
fsc = 0x4;
|
|
break;
|
|
case ARMFault_Background:
|
|
fsc = 0x0;
|
|
break;
|
|
case ARMFault_QEMU_NSCExec:
|
|
fsc = M_FAKE_FSR_NSC_EXEC;
|
|
break;
|
|
case ARMFault_QEMU_SFault:
|
|
fsc = M_FAKE_FSR_SFAULT;
|
|
break;
|
|
default:
|
|
/* Other faults can't occur in a context that requires a
|
|
* short-format status code.
|
|
*/
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
fsc |= (fi->domain << 4);
|
|
return fsc;
|
|
}
|
|
|
|
/**
|
|
* arm_fi_to_lfsc: Convert fault info struct to long-format FSC
|
|
* Compare pseudocode EncodeLDFSC(), though unlike that function
|
|
* we fill in also the LPAE bit 9 of a DFSR format.
|
|
*/
|
|
static inline uint32_t arm_fi_to_lfsc(ARMMMUFaultInfo *fi)
|
|
{
|
|
uint32_t fsc;
|
|
|
|
switch (fi->type) {
|
|
case ARMFault_None:
|
|
return 0;
|
|
case ARMFault_AddressSize:
|
|
fsc = fi->level & 3;
|
|
break;
|
|
case ARMFault_AccessFlag:
|
|
fsc = (fi->level & 3) | (0x2 << 2);
|
|
break;
|
|
case ARMFault_Permission:
|
|
fsc = (fi->level & 3) | (0x3 << 2);
|
|
break;
|
|
case ARMFault_Translation:
|
|
fsc = (fi->level & 3) | (0x1 << 2);
|
|
break;
|
|
case ARMFault_SyncExternal:
|
|
fsc = 0x10 | (fi->ea << 12);
|
|
break;
|
|
case ARMFault_SyncExternalOnWalk:
|
|
fsc = (fi->level & 3) | (0x5 << 2) | (fi->ea << 12);
|
|
break;
|
|
case ARMFault_SyncParity:
|
|
fsc = 0x18;
|
|
break;
|
|
case ARMFault_SyncParityOnWalk:
|
|
fsc = (fi->level & 3) | (0x7 << 2);
|
|
break;
|
|
case ARMFault_AsyncParity:
|
|
fsc = 0x19;
|
|
break;
|
|
case ARMFault_AsyncExternal:
|
|
fsc = 0x11 | (fi->ea << 12);
|
|
break;
|
|
case ARMFault_Alignment:
|
|
fsc = 0x21;
|
|
break;
|
|
case ARMFault_Debug:
|
|
fsc = 0x22;
|
|
break;
|
|
case ARMFault_TLBConflict:
|
|
fsc = 0x30;
|
|
break;
|
|
case ARMFault_Lockdown:
|
|
fsc = 0x34;
|
|
break;
|
|
case ARMFault_Exclusive:
|
|
fsc = 0x35;
|
|
break;
|
|
default:
|
|
/* Other faults can't occur in a context that requires a
|
|
* long-format status code.
|
|
*/
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
fsc |= 1 << 9;
|
|
return fsc;
|
|
}
|
|
|
|
static inline bool arm_extabort_type(MemTxResult result)
|
|
{
|
|
/* The EA bit in syndromes and fault status registers is an
|
|
* IMPDEF classification of external aborts. ARM implementations
|
|
* usually use this to indicate AXI bus Decode error (0) or
|
|
* Slave error (1); in QEMU we follow that.
|
|
*/
|
|
return result != MEMTX_DECODE_ERROR;
|
|
}
|
|
|
|
/* Do a page table walk and add page to TLB if possible */
|
|
bool arm_tlb_fill(CPUState *cpu, vaddr address,
|
|
MMUAccessType access_type, int mmu_idx,
|
|
ARMMMUFaultInfo *fi);
|
|
|
|
/* Return true if the stage 1 translation regime is using LPAE format page
|
|
* tables */
|
|
bool arm_s1_regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx);
|
|
|
|
/* Raise a data fault alignment exception for the specified virtual address */
|
|
void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
|
|
MMUAccessType access_type,
|
|
int mmu_idx, uintptr_t retaddr);
|
|
|
|
/* arm_cpu_do_transaction_failed: handle a memory system error response
|
|
* (eg "no device/memory present at address") by raising an external abort
|
|
* exception
|
|
*/
|
|
void arm_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
|
|
vaddr addr, unsigned size,
|
|
MMUAccessType access_type,
|
|
int mmu_idx, MemTxAttrs attrs,
|
|
MemTxResult response, uintptr_t retaddr);
|
|
|
|
/* Call the EL change hook if one has been registered */
|
|
static inline void arm_call_el_change_hook(ARMCPU *cpu)
|
|
{
|
|
if (cpu->el_change_hook) {
|
|
cpu->el_change_hook(cpu, cpu->el_change_hook_opaque);
|
|
}
|
|
}
|
|
|
|
/* Return true if this address translation regime is secure */
|
|
static inline bool regime_is_secure(CPUARMState *env, ARMMMUIdx mmu_idx)
|
|
{
|
|
switch (mmu_idx) {
|
|
case ARMMMUIdx_S12NSE0:
|
|
case ARMMMUIdx_S12NSE1:
|
|
case ARMMMUIdx_S1NSE0:
|
|
case ARMMMUIdx_S1NSE1:
|
|
case ARMMMUIdx_S1E2:
|
|
case ARMMMUIdx_S2NS:
|
|
case ARMMMUIdx_MPrivNegPri:
|
|
case ARMMMUIdx_MUserNegPri:
|
|
case ARMMMUIdx_MPriv:
|
|
case ARMMMUIdx_MUser:
|
|
return false;
|
|
case ARMMMUIdx_S1E3:
|
|
case ARMMMUIdx_S1SE0:
|
|
case ARMMMUIdx_S1SE1:
|
|
case ARMMMUIdx_MSPrivNegPri:
|
|
case ARMMMUIdx_MSUserNegPri:
|
|
case ARMMMUIdx_MSPriv:
|
|
case ARMMMUIdx_MSUser:
|
|
return true;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
#endif
|