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qemu/target/microblaze/cpu.h
Richard Henderson fa947a667f hw/core: Make do_unaligned_access noreturn 
While we may have had some thought of allowing system-mode
to return from this hook, we have no guests that require this.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-21 19:36:44 -07:00

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/*
* MicroBlaze virtual CPU header
*
* Copyright (c) 2009 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 2.1 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 MICROBLAZE_CPU_H
#define MICROBLAZE_CPU_H
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
#include "fpu/softfloat-types.h"
typedef struct CPUMBState CPUMBState;
#if !defined(CONFIG_USER_ONLY)
#include "mmu.h"
#endif
#define EXCP_MMU 1
#define EXCP_IRQ 2
#define EXCP_SYSCALL 3 /* user-only */
#define EXCP_HW_BREAK 4
#define EXCP_HW_EXCP 5
/* MicroBlaze-specific interrupt pending bits. */
#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_3
/* Meanings of the MBCPU object's two inbound GPIO lines */
#define MB_CPU_IRQ 0
#define MB_CPU_FIR 1
/* Register aliases. R0 - R15 */
#define R_SP 1
#define SR_PC 0
#define SR_MSR 1
#define SR_EAR 3
#define SR_ESR 5
#define SR_FSR 7
#define SR_BTR 0xb
#define SR_EDR 0xd
/* MSR flags. */
#define MSR_BE (1<<0) /* 0x001 */
#define MSR_IE (1<<1) /* 0x002 */
#define MSR_C (1<<2) /* 0x004 */
#define MSR_BIP (1<<3) /* 0x008 */
#define MSR_FSL (1<<4) /* 0x010 */
#define MSR_ICE (1<<5) /* 0x020 */
#define MSR_DZ (1<<6) /* 0x040 */
#define MSR_DCE (1<<7) /* 0x080 */
#define MSR_EE (1<<8) /* 0x100 */
#define MSR_EIP (1<<9) /* 0x200 */
#define MSR_PVR (1<<10) /* 0x400 */
#define MSR_CC (1<<31)
/* Machine State Register (MSR) Fields */
#define MSR_UM (1<<11) /* User Mode */
#define MSR_UMS (1<<12) /* User Mode Save */
#define MSR_VM (1<<13) /* Virtual Mode */
#define MSR_VMS (1<<14) /* Virtual Mode Save */
#define MSR_KERNEL MSR_EE|MSR_VM
//#define MSR_USER MSR_KERNEL|MSR_UM|MSR_IE
#define MSR_KERNEL_VMS MSR_EE|MSR_VMS
//#define MSR_USER_VMS MSR_KERNEL_VMS|MSR_UMS|MSR_IE
/* Exception State Register (ESR) Fields */
#define ESR_DIZ (1<<11) /* Zone Protection */
#define ESR_W (1<<11) /* Unaligned word access */
#define ESR_S (1<<10) /* Store instruction */
#define ESR_ESS_FSL_OFFSET 5
#define ESR_ESS_MASK (0x7f << 5)
#define ESR_EC_FSL 0
#define ESR_EC_UNALIGNED_DATA 1
#define ESR_EC_ILLEGAL_OP 2
#define ESR_EC_INSN_BUS 3
#define ESR_EC_DATA_BUS 4
#define ESR_EC_DIVZERO 5
#define ESR_EC_FPU 6
#define ESR_EC_PRIVINSN 7
#define ESR_EC_STACKPROT 7 /* Same as PRIVINSN. */
#define ESR_EC_DATA_STORAGE 8
#define ESR_EC_INSN_STORAGE 9
#define ESR_EC_DATA_TLB 10
#define ESR_EC_INSN_TLB 11
#define ESR_EC_MASK 31
/* Floating Point Status Register (FSR) Bits */
#define FSR_IO (1<<4) /* Invalid operation */
#define FSR_DZ (1<<3) /* Divide-by-zero */
#define FSR_OF (1<<2) /* Overflow */
#define FSR_UF (1<<1) /* Underflow */
#define FSR_DO (1<<0) /* Denormalized operand error */
/* Version reg. */
/* Basic PVR mask */
#define PVR0_PVR_FULL_MASK 0x80000000
#define PVR0_USE_BARREL_MASK 0x40000000
#define PVR0_USE_DIV_MASK 0x20000000
#define PVR0_USE_HW_MUL_MASK 0x10000000
#define PVR0_USE_FPU_MASK 0x08000000
#define PVR0_USE_EXC_MASK 0x04000000
#define PVR0_USE_ICACHE_MASK 0x02000000
#define PVR0_USE_DCACHE_MASK 0x01000000
#define PVR0_USE_MMU_MASK 0x00800000
#define PVR0_USE_BTC 0x00400000
#define PVR0_ENDI_MASK 0x00200000
#define PVR0_FAULT 0x00100000
#define PVR0_VERSION_MASK 0x0000FF00
#define PVR0_USER1_MASK 0x000000FF
#define PVR0_SPROT_MASK 0x00000001
#define PVR0_VERSION_SHIFT 8
/* User 2 PVR mask */
#define PVR1_USER2_MASK 0xFFFFFFFF
/* Configuration PVR masks */
#define PVR2_D_OPB_MASK 0x80000000
#define PVR2_D_LMB_MASK 0x40000000
#define PVR2_I_OPB_MASK 0x20000000
#define PVR2_I_LMB_MASK 0x10000000
#define PVR2_INTERRUPT_IS_EDGE_MASK 0x08000000
#define PVR2_EDGE_IS_POSITIVE_MASK 0x04000000
#define PVR2_D_PLB_MASK 0x02000000 /* new */
#define PVR2_I_PLB_MASK 0x01000000 /* new */
#define PVR2_INTERCONNECT 0x00800000 /* new */
#define PVR2_USE_EXTEND_FSL 0x00080000 /* new */
#define PVR2_USE_FSL_EXC 0x00040000 /* new */
#define PVR2_USE_MSR_INSTR 0x00020000
#define PVR2_USE_PCMP_INSTR 0x00010000
#define PVR2_AREA_OPTIMISED 0x00008000
#define PVR2_USE_BARREL_MASK 0x00004000
#define PVR2_USE_DIV_MASK 0x00002000
#define PVR2_USE_HW_MUL_MASK 0x00001000
#define PVR2_USE_FPU_MASK 0x00000800
#define PVR2_USE_MUL64_MASK 0x00000400
#define PVR2_USE_FPU2_MASK 0x00000200 /* new */
#define PVR2_USE_IPLBEXC 0x00000100
#define PVR2_USE_DPLBEXC 0x00000080
#define PVR2_OPCODE_0x0_ILL_MASK 0x00000040
#define PVR2_UNALIGNED_EXC_MASK 0x00000020
#define PVR2_ILL_OPCODE_EXC_MASK 0x00000010
#define PVR2_IOPB_BUS_EXC_MASK 0x00000008
#define PVR2_DOPB_BUS_EXC_MASK 0x00000004
#define PVR2_DIV_ZERO_EXC_MASK 0x00000002
#define PVR2_FPU_EXC_MASK 0x00000001
/* Debug and exception PVR masks */
#define PVR3_DEBUG_ENABLED_MASK 0x80000000
#define PVR3_NUMBER_OF_PC_BRK_MASK 0x1E000000
#define PVR3_NUMBER_OF_RD_ADDR_BRK_MASK 0x00380000
#define PVR3_NUMBER_OF_WR_ADDR_BRK_MASK 0x0000E000
#define PVR3_FSL_LINKS_MASK 0x00000380
/* ICache config PVR masks */
#define PVR4_USE_ICACHE_MASK 0x80000000
#define PVR4_ICACHE_ADDR_TAG_BITS_MASK 0x7C000000
#define PVR4_ICACHE_USE_FSL_MASK 0x02000000
#define PVR4_ICACHE_ALLOW_WR_MASK 0x01000000
#define PVR4_ICACHE_LINE_LEN_MASK 0x00E00000
#define PVR4_ICACHE_BYTE_SIZE_MASK 0x001F0000
/* DCache config PVR masks */
#define PVR5_USE_DCACHE_MASK 0x80000000
#define PVR5_DCACHE_ADDR_TAG_BITS_MASK 0x7C000000
#define PVR5_DCACHE_USE_FSL_MASK 0x02000000
#define PVR5_DCACHE_ALLOW_WR_MASK 0x01000000
#define PVR5_DCACHE_LINE_LEN_MASK 0x00E00000
#define PVR5_DCACHE_BYTE_SIZE_MASK 0x001F0000
#define PVR5_DCACHE_WRITEBACK_MASK 0x00004000
/* ICache base address PVR mask */
#define PVR6_ICACHE_BASEADDR_MASK 0xFFFFFFFF
/* ICache high address PVR mask */
#define PVR7_ICACHE_HIGHADDR_MASK 0xFFFFFFFF
/* DCache base address PVR mask */
#define PVR8_DCACHE_BASEADDR_MASK 0xFFFFFFFF
/* DCache high address PVR mask */
#define PVR9_DCACHE_HIGHADDR_MASK 0xFFFFFFFF
/* Target family PVR mask */
#define PVR10_TARGET_FAMILY_MASK 0xFF000000
#define PVR10_ASIZE_SHIFT 18
/* MMU descrtiption */
#define PVR11_USE_MMU 0xC0000000
#define PVR11_MMU_ITLB_SIZE 0x38000000
#define PVR11_MMU_DTLB_SIZE 0x07000000
#define PVR11_MMU_TLB_ACCESS 0x00C00000
#define PVR11_MMU_ZONES 0x003E0000
/* MSR Reset value PVR mask */
#define PVR11_MSR_RESET_VALUE_MASK 0x000007FF
#define C_PVR_NONE 0
#define C_PVR_BASIC 1
#define C_PVR_FULL 2
/* CPU flags. */
/* Condition codes. */
#define CC_GE 5
#define CC_GT 4
#define CC_LE 3
#define CC_LT 2
#define CC_NE 1
#define CC_EQ 0
#define STREAM_EXCEPTION (1 << 0)
#define STREAM_ATOMIC (1 << 1)
#define STREAM_TEST (1 << 2)
#define STREAM_CONTROL (1 << 3)
#define STREAM_NONBLOCK (1 << 4)
#define TARGET_INSN_START_EXTRA_WORDS 1
/* use-non-secure property masks */
#define USE_NON_SECURE_M_AXI_DP_MASK 0x1
#define USE_NON_SECURE_M_AXI_IP_MASK 0x2
#define USE_NON_SECURE_M_AXI_DC_MASK 0x4
#define USE_NON_SECURE_M_AXI_IC_MASK 0x8
struct CPUMBState {
uint32_t bvalue; /* TCG temporary, only valid during a TB */
uint32_t btarget; /* Full resolved branch destination */
uint32_t imm;
uint32_t regs[32];
uint32_t pc;
uint32_t msr; /* All bits of MSR except MSR[C] and MSR[CC] */
uint32_t msr_c; /* MSR[C], in low bit; other bits must be 0 */
target_ulong ear;
uint32_t esr;
uint32_t fsr;
uint32_t btr;
uint32_t edr;
float_status fp_status;
/* Stack protectors. Yes, it's a hw feature. */
uint32_t slr, shr;
/* lwx/swx reserved address */
#define RES_ADDR_NONE 0xffffffff /* Use 0xffffffff to indicate no reservation */
target_ulong res_addr;
uint32_t res_val;
/* Internal flags. */
#define IMM_FLAG (1 << 0)
#define BIMM_FLAG (1 << 1)
#define ESR_ESS_FLAG (1 << 2) /* indicates ESR_ESS_MASK is present */
/* MSR_EE (1 << 8) -- these 3 are not in iflags but tb_flags */
/* MSR_UM (1 << 11) */
/* MSR_VM (1 << 13) */
/* ESR_ESS_MASK [11:5] -- unwind into iflags for unaligned excp */
#define D_FLAG (1 << 12) /* Bit in ESR. */
#define DRTI_FLAG (1 << 16)
#define DRTE_FLAG (1 << 17)
#define DRTB_FLAG (1 << 18)
/* TB dependent CPUMBState. */
#define IFLAGS_TB_MASK (D_FLAG | BIMM_FLAG | IMM_FLAG | \
DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)
#define MSR_TB_MASK (MSR_UM | MSR_VM | MSR_EE)
uint32_t iflags;
#if !defined(CONFIG_USER_ONLY)
/* Unified MMU. */
MicroBlazeMMU mmu;
#endif
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
/* These fields are preserved on reset. */
};
/*
* Microblaze Configuration Settings
*
* Note that the structure is sorted by type and size to minimize holes.
*/
typedef struct {
char *version;
uint64_t addr_mask;
uint32_t base_vectors;
uint32_t pvr_user2;
uint32_t pvr_regs[13];
uint8_t addr_size;
uint8_t use_fpu;
uint8_t use_hw_mul;
uint8_t pvr_user1;
uint8_t pvr;
uint8_t mmu;
uint8_t mmu_tlb_access;
uint8_t mmu_zones;
bool stackprot;
bool use_barrel;
bool use_div;
bool use_msr_instr;
bool use_pcmp_instr;
bool use_mmu;
uint8_t use_non_secure;
bool dcache_writeback;
bool endi;
bool dopb_bus_exception;
bool iopb_bus_exception;
bool illegal_opcode_exception;
bool opcode_0_illegal;
bool div_zero_exception;
bool unaligned_exceptions;
} MicroBlazeCPUConfig;
/**
* MicroBlazeCPU:
* @env: #CPUMBState
*
* A MicroBlaze CPU.
*/
struct MicroBlazeCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
bool ns_axi_dp;
bool ns_axi_ip;
bool ns_axi_dc;
bool ns_axi_ic;
CPUNegativeOffsetState neg;
CPUMBState env;
MicroBlazeCPUConfig cfg;
};
#ifndef CONFIG_USER_ONLY
void mb_cpu_do_interrupt(CPUState *cs);
bool mb_cpu_exec_interrupt(CPUState *cs, int int_req);
#endif /* !CONFIG_USER_ONLY */
void mb_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr) QEMU_NORETURN;
void mb_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr mb_cpu_get_phys_page_attrs_debug(CPUState *cpu, vaddr addr,
MemTxAttrs *attrs);
int mb_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int mb_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
static inline uint32_t mb_cpu_read_msr(const CPUMBState *env)
{
/* Replicate MSR[C] to MSR[CC]. */
return env->msr | (env->msr_c * (MSR_C | MSR_CC));
}
static inline void mb_cpu_write_msr(CPUMBState *env, uint32_t val)
{
env->msr_c = (val >> 2) & 1;
/*
* Clear both MSR[C] and MSR[CC] from the saved copy.
* MSR_PVR is not writable and is always clear.
*/
env->msr = val & ~(MSR_C | MSR_CC | MSR_PVR);
}
void mb_tcg_init(void);
#define CPU_RESOLVING_TYPE TYPE_MICROBLAZE_CPU
/* MMU modes definitions */
#define MMU_NOMMU_IDX 0
#define MMU_KERNEL_IDX 1
#define MMU_USER_IDX 2
/* See NB_MMU_MODES further up the file. */
bool mb_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
typedef CPUMBState CPUArchState;
typedef MicroBlazeCPU ArchCPU;
#include "exec/cpu-all.h"
/* Ensure there is no overlap between the two masks. */
QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK);
static inline void cpu_get_tb_cpu_state(CPUMBState *env, target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*flags = (env->iflags & IFLAGS_TB_MASK) | (env->msr & MSR_TB_MASK);
*cs_base = (*flags & IMM_FLAG ? env->imm : 0);
}
#if !defined(CONFIG_USER_ONLY)
void mb_cpu_transaction_failed(CPUState *cs, hwaddr physaddr, vaddr addr,
unsigned size, MMUAccessType access_type,
int mmu_idx, MemTxAttrs attrs,
MemTxResult response, uintptr_t retaddr);
#endif
static inline int cpu_mmu_index(CPUMBState *env, bool ifetch)
{
MicroBlazeCPU *cpu = env_archcpu(env);
/* Are we in nommu mode?. */
if (!(env->msr & MSR_VM) || !cpu->cfg.use_mmu) {
return MMU_NOMMU_IDX;
}
if (env->msr & MSR_UM) {
return MMU_USER_IDX;
}
return MMU_KERNEL_IDX;
}
#ifndef CONFIG_USER_ONLY
extern const VMStateDescription vmstate_mb_cpu;
#endif
#endif
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