#include "cpu-defs.h"
-#include "softfloat.h"
-
#define TARGET_HAS_ICE 1
#define ELF_MACHINE EM_CRIS
-#define EXCP_MMU_EXEC 0
-#define EXCP_MMU_READ 1
-#define EXCP_MMU_WRITE 2
-#define EXCP_MMU_FLUSH 3
-#define EXCP_MMU_FAULT 4
-#define EXCP_BREAK 16 /* trap. */
+#define EXCP_NMI 1
+#define EXCP_GURU 2
+#define EXCP_BUSFAULT 3
+#define EXCP_IRQ 4
+#define EXCP_BREAK 5
+
+/* 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_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 PR_SPC 15
/* CPU flags. */
+#define Q_FLAG 0x80000000
+#define M_FLAG 0x40000000
#define S_FLAG 0x200
#define R_FLAG 0x100
#define P_FLAG 0x80
#define NB_MMU_MODES 2
typedef struct CPUCRISState {
- uint32_t debug1;
- uint32_t debug2;
- uint32_t debug3;
-
- /*
- * 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];
-
- uint32_t sregs[256][16]; /* grrr why so many?? */
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 accessable on CRIS. */
uint32_t pc;
- uint32_t sr;
- uint32_t flag_mask; /* Per insn mask of affected flags. */
- /* SSP and USP. */
- int current_sp;
- uint32_t sp[2];
+ /* Pseudo register for the kernel stack. */
+ uint32_t ksp;
- /* These are setup up by the guest code just before transfering the
- control back to the host. */
- int jmp;
- uint32_t btarget;
+ /* Branch. */
+ int dslot;
int btaken;
+ uint32_t btarget;
/* Condition flag tracking. */
uint32_t cc_op;
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;
-
- /* extended arithmetics. */
- int cc_x_live;
+ /* X flag at the time of cc snapshot. */
int cc_x;
- int features;
-
- int exception_index;
- int interrupt_request;
int interrupt_vector;
int fault_vector;
int trap_vector;
- int user_mode_only;
- int halted;
+ /* 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
{
- int exec_insns;
- int exec_loads;
- int exec_stores;
- } stats;
-
+ uint32_t hi;
+ uint32_t lo;
+ } tlbsets[2][4][16];
- jmp_buf jmp_env;
CPU_COMMON
} CPUCRISState;
is returned if the signal was handled by the virtual CPU. */
int cpu_cris_signal_handler(int host_signum, void *pinfo,
void *puc);
-void cpu_cris_flush_flags(CPUCRISState *, int);
-
-
void do_unassigned_access(target_phys_addr_t addr, int is_write, int is_exec,
int is_asi);
enum {
CC_OP_DYNAMIC, /* Use env->cc_op */
CC_OP_FLAGS,
- CC_OP_LOGIC,
CC_OP_CMP,
CC_OP_MOVE,
- CC_OP_MOVE_PD,
- CC_OP_MOVE_SD,
CC_OP_ADD,
CC_OP_ADDC,
CC_OP_MCP,
CC_OP_LZ
};
-#define CCF_C 0x01
-#define CCF_V 0x02
-#define CCF_Z 0x04
-#define CCF_N 0x08
-#define CCF_X 0x10
-
-#define CRIS_SSP 0
-#define CRIS_USP 1
-
-void cris_set_irq_level(CPUCRISState *env, int level, uint8_t vector);
-void cris_set_macsr(CPUCRISState *env, uint32_t val);
-void cris_switch_sp(CPUCRISState *env);
-
-void do_cris_semihosting(CPUCRISState *env, int nr);
-
-enum cris_features {
- CRIS_FEATURE_CF_ISA_MUL,
-};
-
-static inline int cris_feature(CPUCRISState *env, int feature)
-{
- return (env->features & (1u << feature)) != 0;
-}
-
-void register_cris_insns (CPUCRISState *env);
-
/* CRIS uses 8k pages. */
#define TARGET_PAGE_BITS 13
+#define MMAP_SHIFT TARGET_PAGE_BITS
#define CPUState CPUCRISState
#define cpu_init cpu_cris_init
#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
-/* CRIS FIXME: I guess we want to validate supervisor mode acceses here. */
static inline int cpu_mmu_index (CPUState *env)
{
- return 0;
+ return !!(env->pregs[PR_CCS] & U_FLAG);
}
-#include "cpu-all.h"
-
-/* 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_MOF 7
-#define PR_DZ 8
-#define PR_EBP 9
-#define PR_ERP 10
-#define PR_SRP 11
-#define PR_CCS 13
+#if defined(CONFIG_USER_ONLY)
+static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
+{
+ if (newsp)
+ env->regs[14] = newsp;
+ env->regs[10] = 0;
+}
+#endif
/* Support function regs. */
#define SFR_RW_GC_CFG 0][0
-#define SFR_RW_MM_CFG 2][0
-#define SFR_RW_MM_KBASE_LO 2][1
-#define SFR_RW_MM_KBASE_HI 2][2
-#define SFR_R_MM_CAUSE 2][3
-#define SFR_RW_MM_TLB_SEL 2][4
-#define SFR_RW_MM_TLB_LO 2][5
-#define SFR_RW_MM_TLB_HI 2][6
+#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
+#define CPU_PC_FROM_TB(env, tb) env->pc = tb->pc
+
+#include "cpu-all.h"
#endif
projects / qemu / blobdiff