--- /dev/null
+/*
+ * CRIS virtual CPU header
+ *
+ * Copyright (c) 2007 AXIS Communications AB
+ * Written by Edgar E. Iglesias
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef CPU_CRIS_H
+#define CPU_CRIS_H
+
+#include "config.h"
+#include "qemu-common.h"
+
+#define TARGET_LONG_BITS 32
+
+#define CPUArchState struct CPUCRISState
+
+#include "exec/cpu-defs.h"
+
+#define ELF_MACHINE EM_CRIS
+
+#define EXCP_NMI 1
+#define EXCP_GURU 2
+#define EXCP_BUSFAULT 3
+#define EXCP_IRQ 4
+#define EXCP_BREAK 5
+
+/* CRIS-specific interrupt pending bits. */
+#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
+
+/* CRUS CPU device objects interrupt lines. */
+#define CRIS_CPU_IRQ 0
+#define CRIS_CPU_NMI 1
+
+/* Register aliases. R0 - R15 */
+#define R_FP 8
+#define R_SP 14
+#define R_ACR 15
+
+/* Support regs, P0 - P15 */
+#define PR_BZ 0
+#define PR_VR 1
+#define PR_PID 2
+#define PR_SRS 3
+#define PR_WZ 4
+#define PR_EXS 5
+#define PR_EDA 6
+#define PR_PREFIX 6 /* On CRISv10 P6 is reserved, we use it as prefix. */
+#define PR_MOF 7
+#define PR_DZ 8
+#define PR_EBP 9
+#define PR_ERP 10
+#define PR_SRP 11
+#define PR_NRP 12
+#define PR_CCS 13
+#define PR_USP 14
+#define PRV10_BRP 14
+#define PR_SPC 15
+
+/* CPU flags. */
+#define Q_FLAG 0x80000000
+#define M_FLAG_V32 0x40000000
+#define PFIX_FLAG 0x800 /* CRISv10 Only. */
+#define F_FLAG_V10 0x400
+#define P_FLAG_V10 0x200
+#define S_FLAG 0x200
+#define R_FLAG 0x100
+#define P_FLAG 0x80
+#define M_FLAG_V10 0x80
+#define U_FLAG 0x40
+#define I_FLAG 0x20
+#define X_FLAG 0x10
+#define N_FLAG 0x08
+#define Z_FLAG 0x04
+#define V_FLAG 0x02
+#define C_FLAG 0x01
+#define ALU_FLAGS 0x1F
+
+/* Condition codes. */
+#define CC_CC 0
+#define CC_CS 1
+#define CC_NE 2
+#define CC_EQ 3
+#define CC_VC 4
+#define CC_VS 5
+#define CC_PL 6
+#define CC_MI 7
+#define CC_LS 8
+#define CC_HI 9
+#define CC_GE 10
+#define CC_LT 11
+#define CC_GT 12
+#define CC_LE 13
+#define CC_A 14
+#define CC_P 15
+
+#define NB_MMU_MODES 2
+
+typedef struct CPUCRISState {
+ uint32_t regs[16];
+ /* P0 - P15 are referred to as special registers in the docs. */
+ uint32_t pregs[16];
+
+ /* Pseudo register for the PC. Not directly accessible on CRIS. */
+ uint32_t pc;
+
+ /* Pseudo register for the kernel stack. */
+ uint32_t ksp;
+
+ /* Branch. */
+ int dslot;
+ int btaken;
+ uint32_t btarget;
+
+ /* Condition flag tracking. */
+ uint32_t cc_op;
+ uint32_t cc_mask;
+ uint32_t cc_dest;
+ uint32_t cc_src;
+ uint32_t cc_result;
+ /* size of the operation, 1 = byte, 2 = word, 4 = dword. */
+ int cc_size;
+ /* X flag at the time of cc snapshot. */
+ int cc_x;
+
+ /* CRIS has certain insns that lockout interrupts. */
+ int locked_irq;
+ int interrupt_vector;
+ int fault_vector;
+ int trap_vector;
+
+ /* FIXME: add a check in the translator to avoid writing to support
+ register sets beyond the 4th. The ISA allows up to 256! but in
+ practice there is no core that implements more than 4.
+
+ Support function registers are used to control units close to the
+ core. Accesses do not pass down the normal hierarchy.
+ */
+ uint32_t sregs[4][16];
+
+ /* Linear feedback shift reg in the mmu. Used to provide pseudo
+ randomness for the 'hint' the mmu gives to sw for chosing valid
+ sets on TLB refills. */
+ uint32_t mmu_rand_lfsr;
+
+ /*
+ * We just store the stores to the tlbset here for later evaluation
+ * when the hw needs access to them.
+ *
+ * One for I and another for D.
+ */
+ struct
+ {
+ uint32_t hi;
+ uint32_t lo;
+ } tlbsets[2][4][16];
+
+ CPU_COMMON
+
+ /* Members from load_info on are preserved across resets. */
+ void *load_info;
+} CPUCRISState;
+
+#include "cpu-qom.h"
+
+CRISCPU *cpu_cris_init(const char *cpu_model);
+int cpu_cris_exec(CPUState *cpu);
+/* you can call this signal handler from your SIGBUS and SIGSEGV
+ signal handlers to inform the virtual CPU of exceptions. non zero
+ is returned if the signal was handled by the virtual CPU. */
+int cpu_cris_signal_handler(int host_signum, void *pinfo,
+ void *puc);
+
+void cris_initialize_tcg(void);
+void cris_initialize_crisv10_tcg(void);
+
+enum {
+ CC_OP_DYNAMIC, /* Use env->cc_op */
+ CC_OP_FLAGS,
+ CC_OP_CMP,
+ CC_OP_MOVE,
+ CC_OP_ADD,
+ CC_OP_ADDC,
+ CC_OP_MCP,
+ CC_OP_ADDU,
+ CC_OP_SUB,
+ CC_OP_SUBU,
+ CC_OP_NEG,
+ CC_OP_BTST,
+ CC_OP_MULS,
+ CC_OP_MULU,
+ CC_OP_DSTEP,
+ CC_OP_MSTEP,
+ CC_OP_BOUND,
+
+ CC_OP_OR,
+ CC_OP_AND,
+ CC_OP_XOR,
+ CC_OP_LSL,
+ CC_OP_LSR,
+ CC_OP_ASR,
+ CC_OP_LZ
+};
+
+/* CRIS uses 8k pages. */
+#define TARGET_PAGE_BITS 13
+#define MMAP_SHIFT TARGET_PAGE_BITS
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_VIRT_ADDR_SPACE_BITS 32
+
+#define cpu_init(cpu_model) CPU(cpu_cris_init(cpu_model))
+
+#define cpu_exec cpu_cris_exec
+#define cpu_gen_code cpu_cris_gen_code
+#define cpu_signal_handler cpu_cris_signal_handler
+
+#define CPU_SAVE_VERSION 1
+
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _kernel
+#define MMU_MODE1_SUFFIX _user
+#define MMU_USER_IDX 1
+static inline int cpu_mmu_index (CPUCRISState *env)
+{
+ return !!(env->pregs[PR_CCS] & U_FLAG);
+}
+
+int cris_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
+ int mmu_idx);
+
+/* Support function regs. */
+#define SFR_RW_GC_CFG 0][0
+#define SFR_RW_MM_CFG env->pregs[PR_SRS]][0
+#define SFR_RW_MM_KBASE_LO env->pregs[PR_SRS]][1
+#define SFR_RW_MM_KBASE_HI env->pregs[PR_SRS]][2
+#define SFR_R_MM_CAUSE env->pregs[PR_SRS]][3
+#define SFR_RW_MM_TLB_SEL env->pregs[PR_SRS]][4
+#define SFR_RW_MM_TLB_LO env->pregs[PR_SRS]][5
+#define SFR_RW_MM_TLB_HI env->pregs[PR_SRS]][6
+
+#include "exec/cpu-all.h"
+
+static inline void cpu_get_tb_cpu_state(CPUCRISState *env, target_ulong *pc,
+ target_ulong *cs_base, int *flags)
+{
+ *pc = env->pc;
+ *cs_base = 0;
+ *flags = env->dslot |
+ (env->pregs[PR_CCS] & (S_FLAG | P_FLAG | U_FLAG
+ | X_FLAG | PFIX_FLAG));
+}
+
+#define cpu_list cris_cpu_list
+void cris_cpu_list(FILE *f, fprintf_function cpu_fprintf);
+
+#include "exec/exec-all.h"
+
+#endif
Code Review / kvmfornfv.git / blobdiff