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cpu.h
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cpu.h
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/*
* UniCore32 virtual CPU header
*
* Copyright (C) 2010-2012 Guan Xuetao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation, or (at your option) any
* later version. See the COPYING file in the top-level directory.
*/
#ifndef QEMU_UNICORE32_CPU_H
#define QEMU_UNICORE32_CPU_H
#define TARGET_LONG_BITS 32
#define TARGET_PAGE_BITS 12
#define TARGET_PHYS_ADDR_SPACE_BITS 32
#define TARGET_VIRT_ADDR_SPACE_BITS 32
#define ELF_MACHINE EM_UNICORE32
#define CPUArchState struct CPUUniCore32State
#include "config.h"
#include "qemu-common.h"
#include "cpu-defs.h"
#include "softfloat.h"
#define NB_MMU_MODES 2
typedef struct CPUUniCore32State {
/* Regs for current mode. */
uint32_t regs[32];
/* Frequently accessed ASR bits are stored separately for efficiently.
This contains all the other bits. Use asr_{read,write} to access
the whole ASR. */
uint32_t uncached_asr;
uint32_t bsr;
/* Banked registers. */
uint32_t banked_bsr[6];
uint32_t banked_r29[6];
uint32_t banked_r30[6];
/* asr flag cache for faster execution */
uint32_t CF; /* 0 or 1 */
uint32_t VF; /* V is the bit 31. All other bits are undefined */
uint32_t NF; /* N is bit 31. All other bits are undefined. */
uint32_t ZF; /* Z set if zero. */
/* System control coprocessor (cp0) */
struct {
uint32_t c0_cpuid;
uint32_t c0_cachetype;
uint32_t c1_sys; /* System control register. */
uint32_t c2_base; /* MMU translation table base. */
uint32_t c3_faultstatus; /* Fault status registers. */
uint32_t c4_faultaddr; /* Fault address registers. */
uint32_t c5_cacheop; /* Cache operation registers. */
uint32_t c6_tlbop; /* TLB operation registers. */
} cp0;
/* UniCore-F64 coprocessor state. */
struct {
float64 regs[16];
uint32_t xregs[32];
float_status fp_status;
} ucf64;
CPU_COMMON
/* Internal CPU feature flags. */
uint32_t features;
} CPUUniCore32State;
#define ASR_M (0x1f)
#define ASR_MODE_USER (0x10)
#define ASR_MODE_INTR (0x12)
#define ASR_MODE_PRIV (0x13)
#define ASR_MODE_TRAP (0x17)
#define ASR_MODE_EXTN (0x1b)
#define ASR_MODE_SUSR (0x1f)
#define ASR_I (1 << 7)
#define ASR_V (1 << 28)
#define ASR_C (1 << 29)
#define ASR_Z (1 << 30)
#define ASR_N (1 << 31)
#define ASR_NZCV (ASR_N | ASR_Z | ASR_C | ASR_V)
#define ASR_RESERVED (~(ASR_M | ASR_I | ASR_NZCV))
#define UC32_EXCP_PRIV (1)
#define UC32_EXCP_ITRAP (2)
#define UC32_EXCP_DTRAP (3)
#define UC32_EXCP_INTR (4)
/* Return the current ASR value. */
target_ulong cpu_asr_read(CPUUniCore32State *env1);
/* Set the ASR. Note that some bits of mask must be all-set or all-clear. */
void cpu_asr_write(CPUUniCore32State *env1, target_ulong val, target_ulong mask);
/* UniCore-F64 system registers. */
#define UC32_UCF64_FPSCR (31)
#define UCF64_FPSCR_MASK (0x27ffffff)
#define UCF64_FPSCR_RND_MASK (0x7)
#define UCF64_FPSCR_RND(r) (((r) >> 0) & UCF64_FPSCR_RND_MASK)
#define UCF64_FPSCR_TRAPEN_MASK (0x7f)
#define UCF64_FPSCR_TRAPEN(r) (((r) >> 10) & UCF64_FPSCR_TRAPEN_MASK)
#define UCF64_FPSCR_FLAG_MASK (0x3ff)
#define UCF64_FPSCR_FLAG(r) (((r) >> 17) & UCF64_FPSCR_FLAG_MASK)
#define UCF64_FPSCR_FLAG_ZERO (1 << 17)
#define UCF64_FPSCR_FLAG_INFINITY (1 << 18)
#define UCF64_FPSCR_FLAG_INVALID (1 << 19)
#define UCF64_FPSCR_FLAG_UNDERFLOW (1 << 20)
#define UCF64_FPSCR_FLAG_OVERFLOW (1 << 21)
#define UCF64_FPSCR_FLAG_INEXACT (1 << 22)
#define UCF64_FPSCR_FLAG_HUGEINT (1 << 23)
#define UCF64_FPSCR_FLAG_DENORMAL (1 << 24)
#define UCF64_FPSCR_FLAG_UNIMP (1 << 25)
#define UCF64_FPSCR_FLAG_DIVZERO (1 << 26)
#define UC32_HWCAP_CMOV 4 /* 1 << 2 */
#define UC32_HWCAP_UCF64 8 /* 1 << 3 */
#define cpu_init uc32_cpu_init
#define cpu_exec uc32_cpu_exec
#define cpu_signal_handler uc32_cpu_signal_handler
#define cpu_handle_mmu_fault uc32_cpu_handle_mmu_fault
CPUUniCore32State *uc32_cpu_init(const char *cpu_model);
int uc32_cpu_exec(CPUUniCore32State *s);
int uc32_cpu_signal_handler(int host_signum, void *pinfo, void *puc);
int uc32_cpu_handle_mmu_fault(CPUUniCore32State *env, target_ulong address, int rw,
int mmu_idx);
#define CPU_SAVE_VERSION 2
/* MMU modes definitions */
#define MMU_MODE0_SUFFIX _kernel
#define MMU_MODE1_SUFFIX _user
#define MMU_USER_IDX 1
static inline int cpu_mmu_index(CPUUniCore32State *env)
{
return (env->uncached_asr & ASR_M) == ASR_MODE_USER ? 1 : 0;
}
static inline void cpu_clone_regs(CPUUniCore32State *env, target_ulong newsp)
{
if (newsp) {
env->regs[29] = newsp;
}
env->regs[0] = 0;
}
static inline void cpu_set_tls(CPUUniCore32State *env, target_ulong newtls)
{
env->regs[16] = newtls;
}
#include "cpu-all.h"
#include "cpu-qom.h"
#include "exec-all.h"
static inline void cpu_pc_from_tb(CPUUniCore32State *env, TranslationBlock *tb)
{
env->regs[31] = tb->pc;
}
static inline void cpu_get_tb_cpu_state(CPUUniCore32State *env, target_ulong *pc,
target_ulong *cs_base, int *flags)
{
*pc = env->regs[31];
*cs_base = 0;
*flags = 0;
if ((env->uncached_asr & ASR_M) != ASR_MODE_USER) {
*flags |= (1 << 6);
}
}
void uc32_translate_init(void);
void do_interrupt(CPUUniCore32State *);
void switch_mode(CPUUniCore32State *, int);
static inline bool cpu_has_work(CPUUniCore32State *env)
{
return env->interrupt_request &
(CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
}
#endif /* QEMU_UNICORE32_CPU_H */