qemu/target/openrisc/cpu.h
Peter Maydell 71b3254dd2 target/openrisc: Move pic_cpu code into CPU object proper
The openrisc code uses an old style of interrupt handling, where a
separate standalone set of qemu_irqs invoke a function
openrisc_pic_cpu_handler() which signals the interrupt to the CPU
proper by directly calling cpu_interrupt() and cpu_reset_interrupt().
Because CPU objects now inherit (indirectly) from TYPE_DEVICE, they
can have GPIO input lines themselves, and the neater modern way to
implement this is to simply have the CPU object itself provide the
input IRQ lines.

Create GPIO inputs to the OpenRISC CPU object, and make the only user
of cpu_openrisc_pic_init() wire up directly to those instead.

This allows us to delete the hw/openrisc/pic_cpu.c file entirely.

This fixes a trivial memory leak reported by Coverity of the IRQs
allocated in cpu_openrisc_pic_init().

Fixes: Coverity CID 1421934
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stafford Horne <shorne@gmail.com>
Message-id: 20201127225127.14770-4-peter.maydell@linaro.org
2020-12-15 12:04:30 +00:00

417 lines
11 KiB
C

/*
* OpenRISC virtual CPU header.
*
* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
*
* 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
* 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/>.
*/
#ifndef OPENRISC_CPU_H
#define OPENRISC_CPU_H
#include "exec/cpu-defs.h"
#include "hw/core/cpu.h"
#include "qom/object.h"
/* cpu_openrisc_map_address_* in CPUOpenRISCTLBContext need this decl. */
struct OpenRISCCPU;
#define TYPE_OPENRISC_CPU "or1k-cpu"
OBJECT_DECLARE_TYPE(OpenRISCCPU, OpenRISCCPUClass,
OPENRISC_CPU)
/**
* OpenRISCCPUClass:
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
*
* A OpenRISC CPU model.
*/
struct OpenRISCCPUClass {
/*< private >*/
CPUClass parent_class;
/*< public >*/
DeviceRealize parent_realize;
DeviceReset parent_reset;
};
#define TARGET_INSN_START_EXTRA_WORDS 1
enum {
MMU_NOMMU_IDX = 0,
MMU_SUPERVISOR_IDX = 1,
MMU_USER_IDX = 2,
};
#define SET_FP_CAUSE(reg, v) do {\
(reg) = ((reg) & ~(0x3f << 12)) | \
((v & 0x3f) << 12);\
} while (0)
#define GET_FP_ENABLE(reg) (((reg) >> 7) & 0x1f)
#define UPDATE_FP_FLAGS(reg, v) do {\
(reg) |= ((v & 0x1f) << 2);\
} while (0)
/* Interrupt */
#define NR_IRQS 32
/* Unit presece register */
enum {
UPR_UP = (1 << 0),
UPR_DCP = (1 << 1),
UPR_ICP = (1 << 2),
UPR_DMP = (1 << 3),
UPR_IMP = (1 << 4),
UPR_MP = (1 << 5),
UPR_DUP = (1 << 6),
UPR_PCUR = (1 << 7),
UPR_PMP = (1 << 8),
UPR_PICP = (1 << 9),
UPR_TTP = (1 << 10),
UPR_CUP = (255 << 24),
};
/* CPU configure register */
enum {
CPUCFGR_NSGF = (15 << 0),
CPUCFGR_CGF = (1 << 4),
CPUCFGR_OB32S = (1 << 5),
CPUCFGR_OB64S = (1 << 6),
CPUCFGR_OF32S = (1 << 7),
CPUCFGR_OF64S = (1 << 8),
CPUCFGR_OV64S = (1 << 9),
CPUCFGR_ND = (1 << 10),
CPUCFGR_AVRP = (1 << 11),
CPUCFGR_EVBARP = (1 << 12),
CPUCFGR_ISRP = (1 << 13),
CPUCFGR_AECSRP = (1 << 14),
CPUCFGR_OF64A32S = (1 << 15),
};
/* DMMU configure register */
enum {
DMMUCFGR_NTW = (3 << 0),
DMMUCFGR_NTS = (7 << 2),
DMMUCFGR_NAE = (7 << 5),
DMMUCFGR_CRI = (1 << 8),
DMMUCFGR_PRI = (1 << 9),
DMMUCFGR_TEIRI = (1 << 10),
DMMUCFGR_HTR = (1 << 11),
};
/* IMMU configure register */
enum {
IMMUCFGR_NTW = (3 << 0),
IMMUCFGR_NTS = (7 << 2),
IMMUCFGR_NAE = (7 << 5),
IMMUCFGR_CRI = (1 << 8),
IMMUCFGR_PRI = (1 << 9),
IMMUCFGR_TEIRI = (1 << 10),
IMMUCFGR_HTR = (1 << 11),
};
/* Power management register */
enum {
PMR_SDF = (15 << 0),
PMR_DME = (1 << 4),
PMR_SME = (1 << 5),
PMR_DCGE = (1 << 6),
PMR_SUME = (1 << 7),
};
/* Float point control status register */
enum {
FPCSR_FPEE = 1,
FPCSR_RM = (3 << 1),
FPCSR_OVF = (1 << 3),
FPCSR_UNF = (1 << 4),
FPCSR_SNF = (1 << 5),
FPCSR_QNF = (1 << 6),
FPCSR_ZF = (1 << 7),
FPCSR_IXF = (1 << 8),
FPCSR_IVF = (1 << 9),
FPCSR_INF = (1 << 10),
FPCSR_DZF = (1 << 11),
};
/* Exceptions indices */
enum {
EXCP_RESET = 0x1,
EXCP_BUSERR = 0x2,
EXCP_DPF = 0x3,
EXCP_IPF = 0x4,
EXCP_TICK = 0x5,
EXCP_ALIGN = 0x6,
EXCP_ILLEGAL = 0x7,
EXCP_INT = 0x8,
EXCP_DTLBMISS = 0x9,
EXCP_ITLBMISS = 0xa,
EXCP_RANGE = 0xb,
EXCP_SYSCALL = 0xc,
EXCP_FPE = 0xd,
EXCP_TRAP = 0xe,
EXCP_NR,
};
/* Supervisor register */
enum {
SR_SM = (1 << 0),
SR_TEE = (1 << 1),
SR_IEE = (1 << 2),
SR_DCE = (1 << 3),
SR_ICE = (1 << 4),
SR_DME = (1 << 5),
SR_IME = (1 << 6),
SR_LEE = (1 << 7),
SR_CE = (1 << 8),
SR_F = (1 << 9),
SR_CY = (1 << 10),
SR_OV = (1 << 11),
SR_OVE = (1 << 12),
SR_DSX = (1 << 13),
SR_EPH = (1 << 14),
SR_FO = (1 << 15),
SR_SUMRA = (1 << 16),
SR_SCE = (1 << 17),
};
/* Tick Timer Mode Register */
enum {
TTMR_TP = (0xfffffff),
TTMR_IP = (1 << 28),
TTMR_IE = (1 << 29),
TTMR_M = (3 << 30),
};
/* Timer Mode */
enum {
TIMER_NONE = (0 << 30),
TIMER_INTR = (1 << 30),
TIMER_SHOT = (2 << 30),
TIMER_CONT = (3 << 30),
};
/* TLB size */
enum {
TLB_SIZE = 128,
TLB_MASK = TLB_SIZE - 1,
};
/* TLB prot */
enum {
URE = (1 << 6),
UWE = (1 << 7),
SRE = (1 << 8),
SWE = (1 << 9),
SXE = (1 << 6),
UXE = (1 << 7),
};
typedef struct OpenRISCTLBEntry {
uint32_t mr;
uint32_t tr;
} OpenRISCTLBEntry;
#ifndef CONFIG_USER_ONLY
typedef struct CPUOpenRISCTLBContext {
OpenRISCTLBEntry itlb[TLB_SIZE];
OpenRISCTLBEntry dtlb[TLB_SIZE];
int (*cpu_openrisc_map_address_code)(struct OpenRISCCPU *cpu,
hwaddr *physical,
int *prot,
target_ulong address, int rw);
int (*cpu_openrisc_map_address_data)(struct OpenRISCCPU *cpu,
hwaddr *physical,
int *prot,
target_ulong address, int rw);
} CPUOpenRISCTLBContext;
#endif
typedef struct CPUOpenRISCState {
target_ulong shadow_gpr[16][32]; /* Shadow registers */
target_ulong pc; /* Program counter */
target_ulong ppc; /* Prev PC */
target_ulong jmp_pc; /* Jump PC */
uint64_t mac; /* Multiply registers MACHI:MACLO */
target_ulong epcr; /* Exception PC register */
target_ulong eear; /* Exception EA register */
target_ulong sr_f; /* the SR_F bit, values 0, 1. */
target_ulong sr_cy; /* the SR_CY bit, values 0, 1. */
target_long sr_ov; /* the SR_OV bit (in the sign bit only) */
uint32_t sr; /* Supervisor register, without SR_{F,CY,OV} */
uint32_t esr; /* Exception supervisor register */
uint32_t evbar; /* Exception vector base address register */
uint32_t pmr; /* Power Management Register */
uint32_t fpcsr; /* Float register */
float_status fp_status;
target_ulong lock_addr;
target_ulong lock_value;
uint32_t dflag; /* In delay slot (boolean) */
#ifndef CONFIG_USER_ONLY
CPUOpenRISCTLBContext tlb;
#endif
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;
/* Fields from here on are preserved across CPU reset. */
uint32_t vr; /* Version register */
uint32_t vr2; /* Version register 2 */
uint32_t avr; /* Architecture version register */
uint32_t upr; /* Unit presence register */
uint32_t cpucfgr; /* CPU configure register */
uint32_t dmmucfgr; /* DMMU configure register */
uint32_t immucfgr; /* IMMU configure register */
#ifndef CONFIG_USER_ONLY
QEMUTimer *timer;
uint32_t ttmr; /* Timer tick mode register */
int is_counting;
uint32_t picmr; /* Interrupt mask register */
uint32_t picsr; /* Interrupt contrl register*/
#endif
} CPUOpenRISCState;
/**
* OpenRISCCPU:
* @env: #CPUOpenRISCState
*
* A OpenRISC CPU.
*/
struct OpenRISCCPU {
/*< private >*/
CPUState parent_obj;
/*< public >*/
CPUNegativeOffsetState neg;
CPUOpenRISCState env;
};
void cpu_openrisc_list(void);
void openrisc_cpu_do_interrupt(CPUState *cpu);
bool openrisc_cpu_exec_interrupt(CPUState *cpu, int int_req);
void openrisc_cpu_dump_state(CPUState *cpu, FILE *f, int flags);
hwaddr openrisc_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
int openrisc_cpu_gdb_read_register(CPUState *cpu, GByteArray *buf, int reg);
int openrisc_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
void openrisc_translate_init(void);
bool openrisc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr);
int cpu_openrisc_signal_handler(int host_signum, void *pinfo, void *puc);
int print_insn_or1k(bfd_vma addr, disassemble_info *info);
#define cpu_list cpu_openrisc_list
#define cpu_signal_handler cpu_openrisc_signal_handler
#ifndef CONFIG_USER_ONLY
extern const VMStateDescription vmstate_openrisc_cpu;
/* hw/openrisc_pic.c */
void cpu_openrisc_pic_init(OpenRISCCPU *cpu);
/* hw/openrisc_timer.c */
void cpu_openrisc_clock_init(OpenRISCCPU *cpu);
uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu);
void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val);
void cpu_openrisc_count_update(OpenRISCCPU *cpu);
void cpu_openrisc_timer_update(OpenRISCCPU *cpu);
void cpu_openrisc_count_start(OpenRISCCPU *cpu);
void cpu_openrisc_count_stop(OpenRISCCPU *cpu);
#endif
#define OPENRISC_CPU_TYPE_SUFFIX "-" TYPE_OPENRISC_CPU
#define OPENRISC_CPU_TYPE_NAME(model) model OPENRISC_CPU_TYPE_SUFFIX
#define CPU_RESOLVING_TYPE TYPE_OPENRISC_CPU
typedef CPUOpenRISCState CPUArchState;
typedef OpenRISCCPU ArchCPU;
#include "exec/cpu-all.h"
#define TB_FLAGS_SM SR_SM
#define TB_FLAGS_DME SR_DME
#define TB_FLAGS_IME SR_IME
#define TB_FLAGS_OVE SR_OVE
#define TB_FLAGS_DFLAG 2 /* reuse SR_TEE */
#define TB_FLAGS_R0_0 4 /* reuse SR_IEE */
static inline uint32_t cpu_get_gpr(const CPUOpenRISCState *env, int i)
{
return env->shadow_gpr[0][i];
}
static inline void cpu_set_gpr(CPUOpenRISCState *env, int i, uint32_t val)
{
env->shadow_gpr[0][i] = val;
}
static inline void cpu_get_tb_cpu_state(CPUOpenRISCState *env,
target_ulong *pc,
target_ulong *cs_base, uint32_t *flags)
{
*pc = env->pc;
*cs_base = 0;
*flags = (env->dflag ? TB_FLAGS_DFLAG : 0)
| (cpu_get_gpr(env, 0) ? 0 : TB_FLAGS_R0_0)
| (env->sr & (SR_SM | SR_DME | SR_IME | SR_OVE));
}
static inline int cpu_mmu_index(CPUOpenRISCState *env, bool ifetch)
{
int ret = MMU_NOMMU_IDX; /* mmu is disabled */
if (env->sr & (ifetch ? SR_IME : SR_DME)) {
/* The mmu is enabled; test supervisor state. */
ret = env->sr & SR_SM ? MMU_SUPERVISOR_IDX : MMU_USER_IDX;
}
return ret;
}
static inline uint32_t cpu_get_sr(const CPUOpenRISCState *env)
{
return (env->sr
+ env->sr_f * SR_F
+ env->sr_cy * SR_CY
+ (env->sr_ov < 0) * SR_OV);
}
static inline void cpu_set_sr(CPUOpenRISCState *env, uint32_t val)
{
env->sr_f = (val & SR_F) != 0;
env->sr_cy = (val & SR_CY) != 0;
env->sr_ov = (val & SR_OV ? -1 : 0);
env->sr = (val & ~(SR_F | SR_CY | SR_OV)) | SR_FO;
}
void cpu_set_fpcsr(CPUOpenRISCState *env, uint32_t val);
#define CPU_INTERRUPT_TIMER CPU_INTERRUPT_TGT_INT_0
#endif /* OPENRISC_CPU_H */