[qemu.git] / target-alpha / cpu.h

/*
 *  Alpha emulation cpu definitions for qemu.
 *
 *  Copyright (c) 2007 Jocelyn Mayer
 *
 * 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
 * Lesser 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/>.
 */

#if !defined (__CPU_ALPHA_H__)
#define __CPU_ALPHA_H__

#include "config.h"

#define TARGET_LONG_BITS 64

#define CPUState struct CPUAlphaState

#include "cpu-defs.h"

#include <setjmp.h>

#include "softfloat.h"

#define TARGET_HAS_ICE 1

#define ELF_MACHINE     EM_ALPHA

#define ICACHE_LINE_SIZE 32
#define DCACHE_LINE_SIZE 32

#define TARGET_PAGE_BITS 13

/* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44.  */
#define TARGET_PHYS_ADDR_SPACE_BITS	44
#define TARGET_VIRT_ADDR_SPACE_BITS	(30 + TARGET_PAGE_BITS)

/* Alpha major type */
enum {
    ALPHA_EV3  = 1,
    ALPHA_EV4  = 2,
    ALPHA_SIM  = 3,
    ALPHA_LCA  = 4,
    ALPHA_EV5  = 5, /* 21164 */
    ALPHA_EV45 = 6, /* 21064A */
    ALPHA_EV56 = 7, /* 21164A */
};

/* EV4 minor type */
enum {
    ALPHA_EV4_2 = 0,
    ALPHA_EV4_3 = 1,
};

/* LCA minor type */
enum {
    ALPHA_LCA_1 = 1, /* 21066 */
    ALPHA_LCA_2 = 2, /* 20166 */
    ALPHA_LCA_3 = 3, /* 21068 */
    ALPHA_LCA_4 = 4, /* 21068 */
    ALPHA_LCA_5 = 5, /* 21066A */
    ALPHA_LCA_6 = 6, /* 21068A */
};

/* EV5 minor type */
enum {
    ALPHA_EV5_1 = 1, /* Rev BA, CA */
    ALPHA_EV5_2 = 2, /* Rev DA, EA */
    ALPHA_EV5_3 = 3, /* Pass 3 */
    ALPHA_EV5_4 = 4, /* Pass 3.2 */
    ALPHA_EV5_5 = 5, /* Pass 4 */
};

/* EV45 minor type */
enum {
    ALPHA_EV45_1 = 1, /* Pass 1 */
    ALPHA_EV45_2 = 2, /* Pass 1.1 */
    ALPHA_EV45_3 = 3, /* Pass 2 */
};

/* EV56 minor type */
enum {
    ALPHA_EV56_1 = 1, /* Pass 1 */
    ALPHA_EV56_2 = 2, /* Pass 2 */
};

enum {
    IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */
    IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */
    IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */
    IMPLVER_21364 = 3, /* EV7 & EV79 */
};

enum {
    AMASK_BWX      = 0x00000001,
    AMASK_FIX      = 0x00000002,
    AMASK_CIX      = 0x00000004,
    AMASK_MVI      = 0x00000100,
    AMASK_TRAP     = 0x00000200,
    AMASK_PREFETCH = 0x00001000,
};

enum {
    VAX_ROUND_NORMAL = 0,
    VAX_ROUND_CHOPPED,
};

enum {
    IEEE_ROUND_NORMAL = 0,
    IEEE_ROUND_DYNAMIC,
    IEEE_ROUND_PLUS,
    IEEE_ROUND_MINUS,
    IEEE_ROUND_CHOPPED,
};

/* IEEE floating-point operations encoding */
/* Trap mode */
enum {
    FP_TRAP_I   = 0x0,
    FP_TRAP_U   = 0x1,
    FP_TRAP_S  = 0x4,
    FP_TRAP_SU  = 0x5,
    FP_TRAP_SUI = 0x7,
};

/* Rounding mode */
enum {
    FP_ROUND_CHOPPED = 0x0,
    FP_ROUND_MINUS   = 0x1,
    FP_ROUND_NORMAL  = 0x2,
    FP_ROUND_DYNAMIC = 0x3,
};

/* FPCR bits */
#define FPCR_SUM		(1ULL << 63)
#define FPCR_INED		(1ULL << 62)
#define FPCR_UNFD		(1ULL << 61)
#define FPCR_UNDZ		(1ULL << 60)
#define FPCR_DYN_SHIFT		58
#define FPCR_DYN_CHOPPED	(0ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_MINUS		(1ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_NORMAL		(2ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_PLUS		(3ULL << FPCR_DYN_SHIFT)
#define FPCR_DYN_MASK		(3ULL << FPCR_DYN_SHIFT)
#define FPCR_IOV		(1ULL << 57)
#define FPCR_INE		(1ULL << 56)
#define FPCR_UNF		(1ULL << 55)
#define FPCR_OVF		(1ULL << 54)
#define FPCR_DZE		(1ULL << 53)
#define FPCR_INV		(1ULL << 52)
#define FPCR_OVFD		(1ULL << 51)
#define FPCR_DZED		(1ULL << 50)
#define FPCR_INVD		(1ULL << 49)
#define FPCR_DNZ		(1ULL << 48)
#define FPCR_DNOD		(1ULL << 47)
#define FPCR_STATUS_MASK	(FPCR_IOV | FPCR_INE | FPCR_UNF \
				 | FPCR_OVF | FPCR_DZE | FPCR_INV)

/* The silly software trap enables implemented by the kernel emulation.
   These are more or less architecturally required, since the real hardware
   has read-as-zero bits in the FPCR when the features aren't implemented.
   For the purposes of QEMU, we pretend the FPCR can hold everything.  */
#define SWCR_TRAP_ENABLE_INV	(1ULL << 1)
#define SWCR_TRAP_ENABLE_DZE	(1ULL << 2)
#define SWCR_TRAP_ENABLE_OVF	(1ULL << 3)
#define SWCR_TRAP_ENABLE_UNF	(1ULL << 4)
#define SWCR_TRAP_ENABLE_INE	(1ULL << 5)
#define SWCR_TRAP_ENABLE_DNO	(1ULL << 6)
#define SWCR_TRAP_ENABLE_MASK	((1ULL << 7) - (1ULL << 1))

#define SWCR_MAP_DMZ		(1ULL << 12)
#define SWCR_MAP_UMZ		(1ULL << 13)
#define SWCR_MAP_MASK		(SWCR_MAP_DMZ | SWCR_MAP_UMZ)

#define SWCR_STATUS_INV		(1ULL << 17)
#define SWCR_STATUS_DZE		(1ULL << 18)
#define SWCR_STATUS_OVF		(1ULL << 19)
#define SWCR_STATUS_UNF		(1ULL << 20)
#define SWCR_STATUS_INE		(1ULL << 21)
#define SWCR_STATUS_DNO		(1ULL << 22)
#define SWCR_STATUS_MASK	((1ULL << 23) - (1ULL << 17))

#define SWCR_MASK  (SWCR_TRAP_ENABLE_MASK | SWCR_MAP_MASK | SWCR_STATUS_MASK)

/* MMU modes definitions */

/* Alpha has 5 MMU modes: PALcode, kernel, executive, supervisor, and user.
   The Unix PALcode only exposes the kernel and user modes; presumably
   executive and supervisor are used by VMS.

   PALcode itself uses physical mode for code and kernel mode for data;
   there are PALmode instructions that can access data via physical mode
   or via an os-installed "alternate mode", which is one of the 4 above.

   QEMU does not currently properly distinguish between code/data when
   looking up addresses.  To avoid having to address this issue, our
   emulated PALcode will cheat and use the KSEG mapping for its code+data
   rather than physical addresses.

   Moreover, we're only emulating Unix PALcode, and not attempting VMS.

   All of which allows us to drop all but kernel and user modes.
   Elide the unused MMU modes to save space.  */

#define NB_MMU_MODES 2

#define MMU_MODE0_SUFFIX _kernel
#define MMU_MODE1_SUFFIX _user
#define MMU_KERNEL_IDX   0
#define MMU_USER_IDX     1

typedef struct CPUAlphaState CPUAlphaState;

struct CPUAlphaState {
    uint64_t ir[31];
    float64 fir[31];
    uint64_t pc;
    uint64_t unique;
    uint64_t lock_addr;
    uint64_t lock_st_addr;
    uint64_t lock_value;
    float_status fp_status;
    /* The following fields make up the FPCR, but in FP_STATUS format.  */
    uint8_t fpcr_exc_status;
    uint8_t fpcr_exc_mask;
    uint8_t fpcr_dyn_round;
    uint8_t fpcr_flush_to_zero;
    uint8_t fpcr_dnz;
    uint8_t fpcr_dnod;
    uint8_t fpcr_undz;

    /* The Internal Processor Registers.  Some of these we assume always
       exist for use in user-mode.  */
    uint8_t ps;
    uint8_t intr_flag;
    uint8_t pal_mode;
    uint8_t fen;

    uint32_t pcc_ofs;

    /* These pass data from the exception logic in the translator and
       helpers to the OS entry point.  This is used for both system
       emulation and user-mode.  */
    uint64_t trap_arg0;
    uint64_t trap_arg1;
    uint64_t trap_arg2;

#if !defined(CONFIG_USER_ONLY)
    /* The internal data required by our emulation of the Unix PALcode.  */
    uint64_t exc_addr;
    uint64_t palbr;
    uint64_t ptbr;
    uint64_t vptptr;
    uint64_t sysval;
    uint64_t usp;
    uint64_t shadow[8];
    uint64_t scratch[24];
#endif

#if TARGET_LONG_BITS > HOST_LONG_BITS
    /* temporary fixed-point registers
     * used to emulate 64 bits target on 32 bits hosts
     */
    target_ulong t0, t1;
#endif

    /* Those resources are used only in Qemu core */
    CPU_COMMON

    int error_code;

    uint32_t features;
    uint32_t amask;
    int implver;
};

#define cpu_init cpu_alpha_init
#define cpu_exec cpu_alpha_exec
#define cpu_gen_code cpu_alpha_gen_code
#define cpu_signal_handler cpu_alpha_signal_handler

#include "cpu-all.h"

enum {
    FEATURE_ASN    = 0x00000001,
    FEATURE_SPS    = 0x00000002,
    FEATURE_VIRBND = 0x00000004,
    FEATURE_TBCHK  = 0x00000008,
};

enum {
    EXCP_RESET,
    EXCP_MCHK,
    EXCP_SMP_INTERRUPT,
    EXCP_CLK_INTERRUPT,
    EXCP_DEV_INTERRUPT,
    EXCP_MMFAULT,
    EXCP_UNALIGN,
    EXCP_OPCDEC,
    EXCP_ARITH,
    EXCP_FEN,
    EXCP_CALL_PAL,
    /* For Usermode emulation.  */
    EXCP_STL_C,
    EXCP_STQ_C,
};

/* Alpha-specific interrupt pending bits.  */
#define CPU_INTERRUPT_TIMER	CPU_INTERRUPT_TGT_EXT_0
#define CPU_INTERRUPT_SMP	CPU_INTERRUPT_TGT_EXT_1
#define CPU_INTERRUPT_MCHK	CPU_INTERRUPT_TGT_EXT_2

/* OSF/1 Page table bits.  */
enum {
    PTE_VALID = 0x0001,
    PTE_FOR   = 0x0002,  /* used for page protection (fault on read) */
    PTE_FOW   = 0x0004,  /* used for page protection (fault on write) */
    PTE_FOE   = 0x0008,  /* used for page protection (fault on exec) */
    PTE_ASM   = 0x0010,
    PTE_KRE   = 0x0100,
    PTE_URE   = 0x0200,
    PTE_KWE   = 0x1000,
    PTE_UWE   = 0x2000
};

/* Hardware interrupt (entInt) constants.  */
enum {
    INT_K_IP,
    INT_K_CLK,
    INT_K_MCHK,
    INT_K_DEV,
    INT_K_PERF,
};

/* Memory management (entMM) constants.  */
enum {
    MM_K_TNV,
    MM_K_ACV,
    MM_K_FOR,
    MM_K_FOE,
    MM_K_FOW
};

/* Arithmetic exception (entArith) constants.  */
enum {
    EXC_M_SWC = 1,      /* Software completion */
    EXC_M_INV = 2,      /* Invalid operation */
    EXC_M_DZE = 4,      /* Division by zero */
    EXC_M_FOV = 8,      /* Overflow */
    EXC_M_UNF = 16,     /* Underflow */
    EXC_M_INE = 32,     /* Inexact result */
    EXC_M_IOV = 64      /* Integer Overflow */
};

/* Processor status constants.  */
enum {
    /* Low 3 bits are interrupt mask level.  */
    PS_INT_MASK = 7,

    /* Bits 4 and 5 are the mmu mode.  The VMS PALcode uses all 4 modes;
       The Unix PALcode only uses bit 4.  */
    PS_USER_MODE = 8
};

static inline int cpu_mmu_index(CPUState *env)
{
    if (env->pal_mode) {
        return MMU_KERNEL_IDX;
    } else if (env->ps & PS_USER_MODE) {
        return MMU_USER_IDX;
    } else {
        return MMU_KERNEL_IDX;
    }
}

enum {
    IR_V0   = 0,
    IR_T0   = 1,
    IR_T1   = 2,
    IR_T2   = 3,
    IR_T3   = 4,
    IR_T4   = 5,
    IR_T5   = 6,
    IR_T6   = 7,
    IR_T7   = 8,
    IR_S0   = 9,
    IR_S1   = 10,
    IR_S2   = 11,
    IR_S3   = 12,
    IR_S4   = 13,
    IR_S5   = 14,
    IR_S6   = 15,
    IR_FP   = IR_S6,
    IR_A0   = 16,
    IR_A1   = 17,
    IR_A2   = 18,
    IR_A3   = 19,
    IR_A4   = 20,
    IR_A5   = 21,
    IR_T8   = 22,
    IR_T9   = 23,
    IR_T10  = 24,
    IR_T11  = 25,
    IR_RA   = 26,
    IR_T12  = 27,
    IR_PV   = IR_T12,
    IR_AT   = 28,
    IR_GP   = 29,
    IR_SP   = 30,
    IR_ZERO = 31,
};

CPUAlphaState * cpu_alpha_init (const char *cpu_model);
int cpu_alpha_exec(CPUAlphaState *s);
/* 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_alpha_signal_handler(int host_signum, void *pinfo,
                             void *puc);
int cpu_alpha_handle_mmu_fault (CPUState *env, uint64_t address, int rw,
                                int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_alpha_handle_mmu_fault
void do_interrupt (CPUState *env);

uint64_t cpu_alpha_load_fpcr (CPUState *env);
void cpu_alpha_store_fpcr (CPUState *env, uint64_t val);
extern void swap_shadow_regs(CPUState *env);

/* Bits in TB->FLAGS that control how translation is processed.  */
enum {
    TB_FLAGS_PAL_MODE = 1,
    TB_FLAGS_FEN = 2,
    TB_FLAGS_USER_MODE = 8,

    TB_FLAGS_AMASK_SHIFT = 4,
    TB_FLAGS_AMASK_BWX = AMASK_BWX << TB_FLAGS_AMASK_SHIFT,
    TB_FLAGS_AMASK_FIX = AMASK_FIX << TB_FLAGS_AMASK_SHIFT,
    TB_FLAGS_AMASK_CIX = AMASK_CIX << TB_FLAGS_AMASK_SHIFT,
    TB_FLAGS_AMASK_MVI = AMASK_MVI << TB_FLAGS_AMASK_SHIFT,
    TB_FLAGS_AMASK_TRAP = AMASK_TRAP << TB_FLAGS_AMASK_SHIFT,
    TB_FLAGS_AMASK_PREFETCH = AMASK_PREFETCH << TB_FLAGS_AMASK_SHIFT,
};

static inline void cpu_get_tb_cpu_state(CPUState *env, target_ulong *pc,
                                        target_ulong *cs_base, int *pflags)
{
    int flags = 0;

    *pc = env->pc;
    *cs_base = 0;

    if (env->pal_mode) {
        flags = TB_FLAGS_PAL_MODE;
    } else {
        flags = env->ps & PS_USER_MODE;
    }
    if (env->fen) {
        flags |= TB_FLAGS_FEN;
    }
    flags |= env->amask << TB_FLAGS_AMASK_SHIFT;

    *pflags = flags;
}

#if defined(CONFIG_USER_ONLY)
static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
{
    if (newsp) {
        env->ir[IR_SP] = newsp;
    }
    env->ir[IR_V0] = 0;
    env->ir[IR_A3] = 0;
}

static inline void cpu_set_tls(CPUState *env, target_ulong newtls)
{
    env->unique = newtls;
}
#endif

#endif /* !defined (__CPU_ALPHA_H__) */
Commit	Line	Data
4c9649a9 JM	1	/*
4c9649a9 JM	2	* Alpha emulation cpu definitions for qemu.
5fafdf24	3	*
4c9649a9 JM	4	* Copyright (c) 2007 Jocelyn Mayer
	5	*
	6	* This library is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU Lesser General Public
	8	* License as published by the Free Software Foundation; either
	9	* version 2 of the License, or (at your option) any later version.
	10	*
	11	* This library is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* Lesser General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU Lesser General Public
8167ee88	17	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
4c9649a9 JM	18	*/
	19
	20	#if !defined (__CPU_ALPHA_H__)
	21	#define __CPU_ALPHA_H__
	22
	23	#include "config.h"
	24
	25	#define TARGET_LONG_BITS 64
	26
c2764719 PB	27	#define CPUState struct CPUAlphaState
c2764719 PB	28
4c9649a9 JM	29	#include "cpu-defs.h"
4c9649a9 JM	30
4c9649a9 JM	31	#include <setjmp.h>
	32
	33	#include "softfloat.h"
	34
4c9649a9 JM	35	#define TARGET_HAS_ICE 1
4c9649a9 JM	36
f071b4d3	37	#define ELF_MACHINE EM_ALPHA
4c9649a9 JM	38
	39	#define ICACHE_LINE_SIZE 32
	40	#define DCACHE_LINE_SIZE 32
	41
b09d9d46	42	#define TARGET_PAGE_BITS 13
4c9649a9	43
52705890 RH	44	/* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */
	45	#define TARGET_PHYS_ADDR_SPACE_BITS 44
	46	#define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS)
4c9649a9 JM	47
	48	/* Alpha major type */
	49	enum {
	50	ALPHA_EV3 = 1,
	51	ALPHA_EV4 = 2,
	52	ALPHA_SIM = 3,
	53	ALPHA_LCA = 4,
	54	ALPHA_EV5 = 5, /* 21164 */
	55	ALPHA_EV45 = 6, /* 21064A */
	56	ALPHA_EV56 = 7, /* 21164A */
	57	};
	58
	59	/* EV4 minor type */
	60	enum {
	61	ALPHA_EV4_2 = 0,
	62	ALPHA_EV4_3 = 1,
	63	};
	64
	65	/* LCA minor type */
	66	enum {
	67	ALPHA_LCA_1 = 1, /* 21066 */
	68	ALPHA_LCA_2 = 2, /* 20166 */
	69	ALPHA_LCA_3 = 3, /* 21068 */
	70	ALPHA_LCA_4 = 4, /* 21068 */
	71	ALPHA_LCA_5 = 5, /* 21066A */
	72	ALPHA_LCA_6 = 6, /* 21068A */
	73	};
	74
	75	/* EV5 minor type */
	76	enum {
	77	ALPHA_EV5_1 = 1, /* Rev BA, CA */
	78	ALPHA_EV5_2 = 2, /* Rev DA, EA */
	79	ALPHA_EV5_3 = 3, /* Pass 3 */
	80	ALPHA_EV5_4 = 4, /* Pass 3.2 */
	81	ALPHA_EV5_5 = 5, /* Pass 4 */
	82	};
	83
	84	/* EV45 minor type */
	85	enum {
	86	ALPHA_EV45_1 = 1, /* Pass 1 */
	87	ALPHA_EV45_2 = 2, /* Pass 1.1 */
	88	ALPHA_EV45_3 = 3, /* Pass 2 */
	89	};
	90
	91	/* EV56 minor type */
	92	enum {
	93	ALPHA_EV56_1 = 1, /* Pass 1 */
	94	ALPHA_EV56_2 = 2, /* Pass 2 */
	95	};
	96
	97	enum {
	98	IMPLVER_2106x = 0, /* EV4, EV45 & LCA45 */
	99	IMPLVER_21164 = 1, /* EV5, EV56 & PCA45 */
	100	IMPLVER_21264 = 2, /* EV6, EV67 & EV68x */
	101	IMPLVER_21364 = 3, /* EV7 & EV79 */
	102	};
	103
	104	enum {
	105	AMASK_BWX = 0x00000001,
	106	AMASK_FIX = 0x00000002,
	107	AMASK_CIX = 0x00000004,
	108	AMASK_MVI = 0x00000100,
	109	AMASK_TRAP = 0x00000200,
	110	AMASK_PREFETCH = 0x00001000,
111	};
112
113	enum {
114	VAX_ROUND_NORMAL = 0,
115	VAX_ROUND_CHOPPED,
116	};
117
118	enum {
119	IEEE_ROUND_NORMAL = 0,
120	IEEE_ROUND_DYNAMIC,
121	IEEE_ROUND_PLUS,
122	IEEE_ROUND_MINUS,
123	IEEE_ROUND_CHOPPED,
124	};
125
126	/* IEEE floating-point operations encoding */
127	/* Trap mode */
128	enum {
129	FP_TRAP_I = 0x0,
130	FP_TRAP_U = 0x1,
131	FP_TRAP_S = 0x4,
132	FP_TRAP_SU = 0x5,
133	FP_TRAP_SUI = 0x7,
134	};
135
136	/* Rounding mode */
137	enum {
138	FP_ROUND_CHOPPED = 0x0,
139	FP_ROUND_MINUS = 0x1,
140	FP_ROUND_NORMAL = 0x2,
141	FP_ROUND_DYNAMIC = 0x3,
142	};
143
ba0e276d RH	144	/* FPCR bits */
	145	#define FPCR_SUM (1ULL << 63)
	146	#define FPCR_INED (1ULL << 62)
	147	#define FPCR_UNFD (1ULL << 61)
	148	#define FPCR_UNDZ (1ULL << 60)
	149	#define FPCR_DYN_SHIFT 58
8443effb RH	150	#define FPCR_DYN_CHOPPED (0ULL << FPCR_DYN_SHIFT)
	151	#define FPCR_DYN_MINUS (1ULL << FPCR_DYN_SHIFT)
	152	#define FPCR_DYN_NORMAL (2ULL << FPCR_DYN_SHIFT)
	153	#define FPCR_DYN_PLUS (3ULL << FPCR_DYN_SHIFT)
ba0e276d RH	154	#define FPCR_DYN_MASK (3ULL << FPCR_DYN_SHIFT)
	155	#define FPCR_IOV (1ULL << 57)
	156	#define FPCR_INE (1ULL << 56)
	157	#define FPCR_UNF (1ULL << 55)
	158	#define FPCR_OVF (1ULL << 54)
	159	#define FPCR_DZE (1ULL << 53)
	160	#define FPCR_INV (1ULL << 52)
	161	#define FPCR_OVFD (1ULL << 51)
	162	#define FPCR_DZED (1ULL << 50)
	163	#define FPCR_INVD (1ULL << 49)
	164	#define FPCR_DNZ (1ULL << 48)
	165	#define FPCR_DNOD (1ULL << 47)
	166	#define FPCR_STATUS_MASK (FPCR_IOV \| FPCR_INE \| FPCR_UNF \
	167	\| FPCR_OVF \| FPCR_DZE \| FPCR_INV)
	168
	169	/* The silly software trap enables implemented by the kernel emulation.
	170	These are more or less architecturally required, since the real hardware
	171	has read-as-zero bits in the FPCR when the features aren't implemented.
	172	For the purposes of QEMU, we pretend the FPCR can hold everything. */
	173	#define SWCR_TRAP_ENABLE_INV (1ULL << 1)
	174	#define SWCR_TRAP_ENABLE_DZE (1ULL << 2)
	175	#define SWCR_TRAP_ENABLE_OVF (1ULL << 3)
	176	#define SWCR_TRAP_ENABLE_UNF (1ULL << 4)
	177	#define SWCR_TRAP_ENABLE_INE (1ULL << 5)
	178	#define SWCR_TRAP_ENABLE_DNO (1ULL << 6)
	179	#define SWCR_TRAP_ENABLE_MASK ((1ULL << 7) - (1ULL << 1))
	180
	181	#define SWCR_MAP_DMZ (1ULL << 12)
	182	#define SWCR_MAP_UMZ (1ULL << 13)
	183	#define SWCR_MAP_MASK (SWCR_MAP_DMZ \| SWCR_MAP_UMZ)
	184
	185	#define SWCR_STATUS_INV (1ULL << 17)
	186	#define SWCR_STATUS_DZE (1ULL << 18)
	187	#define SWCR_STATUS_OVF (1ULL << 19)
	188	#define SWCR_STATUS_UNF (1ULL << 20)
	189	#define SWCR_STATUS_INE (1ULL << 21)
	190	#define SWCR_STATUS_DNO (1ULL << 22)
	191	#define SWCR_STATUS_MASK ((1ULL << 23) - (1ULL << 17))
	192
	193	#define SWCR_MASK (SWCR_TRAP_ENABLE_MASK \| SWCR_MAP_MASK \| SWCR_STATUS_MASK)
	194
8417845e RH	195	/* MMU modes definitions */
	196
	197	/* Alpha has 5 MMU modes: PALcode, kernel, executive, supervisor, and user.
	198	The Unix PALcode only exposes the kernel and user modes; presumably
	199	executive and supervisor are used by VMS.
	200
	201	PALcode itself uses physical mode for code and kernel mode for data;
	202	there are PALmode instructions that can access data via physical mode
	203	or via an os-installed "alternate mode", which is one of the 4 above.
	204
	205	QEMU does not currently properly distinguish between code/data when
	206	looking up addresses. To avoid having to address this issue, our
	207	emulated PALcode will cheat and use the KSEG mapping for its code+data
	208	rather than physical addresses.
	209
	210	Moreover, we're only emulating Unix PALcode, and not attempting VMS.
	211
	212	All of which allows us to drop all but kernel and user modes.
	213	Elide the unused MMU modes to save space. */
4c9649a9	214
8417845e RH	215	#define NB_MMU_MODES 2
	216
	217	#define MMU_MODE0_SUFFIX _kernel
	218	#define MMU_MODE1_SUFFIX _user
	219	#define MMU_KERNEL_IDX 0
	220	#define MMU_USER_IDX 1
	221
	222	typedef struct CPUAlphaState CPUAlphaState;
6ebbf390	223
4c9649a9 JM	224	struct CPUAlphaState {
4c9649a9 JM	225	uint64_t ir[31];
8443effb	226	float64 fir[31];
4c9649a9	227	uint64_t pc;
4c9649a9	228	uint64_t unique;
6910b8f6 RH	229	uint64_t lock_addr;
	230	uint64_t lock_st_addr;
	231	uint64_t lock_value;
8443effb RH	232	float_status fp_status;
	233	/* The following fields make up the FPCR, but in FP_STATUS format. */
	234	uint8_t fpcr_exc_status;
	235	uint8_t fpcr_exc_mask;
	236	uint8_t fpcr_dyn_round;
	237	uint8_t fpcr_flush_to_zero;
	238	uint8_t fpcr_dnz;
	239	uint8_t fpcr_dnod;
	240	uint8_t fpcr_undz;
	241
129d8aa5 RH	242	/* The Internal Processor Registers. Some of these we assume always
	243	exist for use in user-mode. */
	244	uint8_t ps;
8443effb	245	uint8_t intr_flag;
129d8aa5	246	uint8_t pal_mode;
26b46094 RH	247	uint8_t fen;
	248
	249	uint32_t pcc_ofs;
129d8aa5 RH	250
	251	/* These pass data from the exception logic in the translator and
	252	helpers to the OS entry point. This is used for both system
	253	emulation and user-mode. */
	254	uint64_t trap_arg0;
	255	uint64_t trap_arg1;
	256	uint64_t trap_arg2;
4c9649a9	257
26b46094 RH	258	#if !defined(CONFIG_USER_ONLY)
	259	/* The internal data required by our emulation of the Unix PALcode. */
	260	uint64_t exc_addr;
	261	uint64_t palbr;
	262	uint64_t ptbr;
	263	uint64_t vptptr;
	264	uint64_t sysval;
	265	uint64_t usp;
	266	uint64_t shadow[8];
	267	uint64_t scratch[24];
	268	#endif
	269
bf9525e9 JM	270	#if TARGET_LONG_BITS > HOST_LONG_BITS
	271	/* temporary fixed-point registers
	272	* used to emulate 64 bits target on 32 bits hosts
5fafdf24	273	*/
04acd307	274	target_ulong t0, t1;
bf9525e9	275	#endif
4c9649a9 JM	276
	277	/* Those resources are used only in Qemu core */
	278	CPU_COMMON
	279
4c9649a9	280	int error_code;
4c9649a9 JM	281
	282	uint32_t features;
	283	uint32_t amask;
	284	int implver;
4c9649a9 JM	285	};
4c9649a9 JM	286
9467d44c TS	287	#define cpu_init cpu_alpha_init
	288	#define cpu_exec cpu_alpha_exec
	289	#define cpu_gen_code cpu_alpha_gen_code
	290	#define cpu_signal_handler cpu_alpha_signal_handler
	291
4c9649a9 JM	292	#include "cpu-all.h"
	293
	294	enum {
	295	FEATURE_ASN = 0x00000001,
	296	FEATURE_SPS = 0x00000002,
	297	FEATURE_VIRBND = 0x00000004,
	298	FEATURE_TBCHK = 0x00000008,
	299	};
	300
	301	enum {
07b6c13b RH	302	EXCP_RESET,
	303	EXCP_MCHK,
	304	EXCP_SMP_INTERRUPT,
	305	EXCP_CLK_INTERRUPT,
	306	EXCP_DEV_INTERRUPT,
	307	EXCP_MMFAULT,
	308	EXCP_UNALIGN,
	309	EXCP_OPCDEC,
	310	EXCP_ARITH,
	311	EXCP_FEN,
	312	EXCP_CALL_PAL,
	313	/* For Usermode emulation. */
	314	EXCP_STL_C,
	315	EXCP_STQ_C,
4c9649a9 JM	316	};
4c9649a9 JM	317
6a80e088 RH	318	/* Alpha-specific interrupt pending bits. */
	319	#define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_EXT_0
	320	#define CPU_INTERRUPT_SMP CPU_INTERRUPT_TGT_EXT_1
	321	#define CPU_INTERRUPT_MCHK CPU_INTERRUPT_TGT_EXT_2
	322
a3b9af16 RH	323	/* OSF/1 Page table bits. */
	324	enum {
	325	PTE_VALID = 0x0001,
	326	PTE_FOR = 0x0002, /* used for page protection (fault on read) */
	327	PTE_FOW = 0x0004, /* used for page protection (fault on write) */
	328	PTE_FOE = 0x0008, /* used for page protection (fault on exec) */
	329	PTE_ASM = 0x0010,
	330	PTE_KRE = 0x0100,
	331	PTE_URE = 0x0200,
	332	PTE_KWE = 0x1000,
	333	PTE_UWE = 0x2000
	334	};
	335
ea879fc7 RH	336	/* Hardware interrupt (entInt) constants. */
	337	enum {
	338	INT_K_IP,
	339	INT_K_CLK,
	340	INT_K_MCHK,
	341	INT_K_DEV,
	342	INT_K_PERF,
	343	};
	344
	345	/* Memory management (entMM) constants. */
	346	enum {
	347	MM_K_TNV,
	348	MM_K_ACV,
	349	MM_K_FOR,
	350	MM_K_FOE,
	351	MM_K_FOW
	352	};
	353
	354	/* Arithmetic exception (entArith) constants. */
	355	enum {
	356	EXC_M_SWC = 1, /* Software completion */
	357	EXC_M_INV = 2, /* Invalid operation */
	358	EXC_M_DZE = 4, /* Division by zero */
	359	EXC_M_FOV = 8, /* Overflow */
	360	EXC_M_UNF = 16, /* Underflow */
	361	EXC_M_INE = 32, /* Inexact result */
	362	EXC_M_IOV = 64 /* Integer Overflow */
	363	};
	364
	365	/* Processor status constants. */
	366	enum {
	367	/* Low 3 bits are interrupt mask level. */
	368	PS_INT_MASK = 7,
	369
	370	/* Bits 4 and 5 are the mmu mode. The VMS PALcode uses all 4 modes;
	371	The Unix PALcode only uses bit 4. */
	372	PS_USER_MODE = 8
	373	};
	374
	375	static inline int cpu_mmu_index(CPUState *env)
	376	{
bba9bdce RH	377	if (env->pal_mode) {
	378	return MMU_KERNEL_IDX;
	379	} else if (env->ps & PS_USER_MODE) {
	380	return MMU_USER_IDX;
	381	} else {
	382	return MMU_KERNEL_IDX;
	383	}
ea879fc7	384	}
4c9649a9	385
4c9649a9 JM	386	enum {
	387	IR_V0 = 0,
	388	IR_T0 = 1,
	389	IR_T1 = 2,
	390	IR_T2 = 3,
	391	IR_T3 = 4,
	392	IR_T4 = 5,
	393	IR_T5 = 6,
	394	IR_T6 = 7,
	395	IR_T7 = 8,
	396	IR_S0 = 9,
	397	IR_S1 = 10,
	398	IR_S2 = 11,
	399	IR_S3 = 12,
	400	IR_S4 = 13,
	401	IR_S5 = 14,
	402	IR_S6 = 15,
a4b388ff	403	IR_FP = IR_S6,
4c9649a9 JM	404	IR_A0 = 16,
	405	IR_A1 = 17,
	406	IR_A2 = 18,
	407	IR_A3 = 19,
	408	IR_A4 = 20,
	409	IR_A5 = 21,
	410	IR_T8 = 22,
	411	IR_T9 = 23,
	412	IR_T10 = 24,
	413	IR_T11 = 25,
	414	IR_RA = 26,
	415	IR_T12 = 27,
a4b388ff	416	IR_PV = IR_T12,
4c9649a9 JM	417	IR_AT = 28,
	418	IR_GP = 29,
	419	IR_SP = 30,
	420	IR_ZERO = 31,
	421	};
	422
aaed909a	423	CPUAlphaState * cpu_alpha_init (const char *cpu_model);
e96efcfc JM	424	int cpu_alpha_exec(CPUAlphaState *s);
	425	/* you can call this signal handler from your SIGBUS and SIGSEGV
	426	signal handlers to inform the virtual CPU of exceptions. non zero
	427	is returned if the signal was handled by the virtual CPU. */
5fafdf24	428	int cpu_alpha_signal_handler(int host_signum, void *pinfo,
e96efcfc	429	void *puc);
95870356 AJ	430	int cpu_alpha_handle_mmu_fault (CPUState *env, uint64_t address, int rw,
95870356 AJ	431	int mmu_idx, int is_softmmu);
0b5c1ce8	432	#define cpu_handle_mmu_fault cpu_alpha_handle_mmu_fault
95870356 AJ	433	void do_interrupt (CPUState *env);
95870356 AJ	434
ba0e276d RH	435	uint64_t cpu_alpha_load_fpcr (CPUState *env);
ba0e276d RH	436	void cpu_alpha_store_fpcr (CPUState *env, uint64_t val);
21d2beaa	437	extern void swap_shadow_regs(CPUState *env);
4c9649a9	438
a18ad893 RH	439	/* Bits in TB->FLAGS that control how translation is processed. */
	440	enum {
	441	TB_FLAGS_PAL_MODE = 1,
	442	TB_FLAGS_FEN = 2,
	443	TB_FLAGS_USER_MODE = 8,
	444
	445	TB_FLAGS_AMASK_SHIFT = 4,
	446	TB_FLAGS_AMASK_BWX = AMASK_BWX << TB_FLAGS_AMASK_SHIFT,
	447	TB_FLAGS_AMASK_FIX = AMASK_FIX << TB_FLAGS_AMASK_SHIFT,
	448	TB_FLAGS_AMASK_CIX = AMASK_CIX << TB_FLAGS_AMASK_SHIFT,
	449	TB_FLAGS_AMASK_MVI = AMASK_MVI << TB_FLAGS_AMASK_SHIFT,
	450	TB_FLAGS_AMASK_TRAP = AMASK_TRAP << TB_FLAGS_AMASK_SHIFT,
	451	TB_FLAGS_AMASK_PREFETCH = AMASK_PREFETCH << TB_FLAGS_AMASK_SHIFT,
	452	};
	453
6b917547	454	static inline void cpu_get_tb_cpu_state(CPUState env, target_ulong pc,
a18ad893	455	target_ulong cs_base, int pflags)
6b917547	456	{
a18ad893 RH	457	int flags = 0;
a18ad893 RH	458
6b917547 AL	459	*pc = env->pc;
6b917547 AL	460	*cs_base = 0;
a18ad893 RH	461
	462	if (env->pal_mode) {
	463	flags = TB_FLAGS_PAL_MODE;
	464	} else {
	465	flags = env->ps & PS_USER_MODE;
	466	}
	467	if (env->fen) {
	468	flags \|= TB_FLAGS_FEN;
	469	}
	470	flags \|= env->amask << TB_FLAGS_AMASK_SHIFT;
	471
	472	*pflags = flags;
6b917547 AL	473	}
6b917547 AL	474
a4b388ff RH	475	#if defined(CONFIG_USER_ONLY)
	476	static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)
	477	{
	478	if (newsp) {
	479	env->ir[IR_SP] = newsp;
	480	}
	481	env->ir[IR_V0] = 0;
	482	env->ir[IR_A3] = 0;
	483	}
	484
	485	static inline void cpu_set_tls(CPUState *env, target_ulong newtls)
	486	{
	487	env->unique = newtls;
	488	}
	489	#endif
	490
4c9649a9	491	#endif /* !defined (__CPU_ALPHA_H__) */