ri.h

来自「国产CPU－龙芯（loongson)BIOS源代码」· C头文件 代码 · 共 256 行

typedef void * vaddr_t_l;

#define MIPSInst(x) x

#define I_OPCODE_SFT	26
#define MIPSInst_OPCODE(x) (MIPSInst(x) >> I_OPCODE_SFT)

#define I_JTARGET_SFT	0
#define MIPSInst_JTARGET(x) (MIPSInst(x) & 0x03ffffff)

#define I_RS_SFT	21
#define MIPSInst_RS(x) ((MIPSInst(x) & 0x03e00000) >> I_RS_SFT)

#define I_RT_SFT	16
#define MIPSInst_RT(x) ((MIPSInst(x) & 0x001f0000) >> I_RT_SFT)

#define I_IMM_SFT	0
#define MIPSInst_SIMM(x) ((int)((short)(MIPSInst(x) & 0xffff)))
#define MIPSInst_UIMM(x) (MIPSInst(x) & 0xffff)

#define I_CACHEOP_SFT	18
#define MIPSInst_CACHEOP(x) ((MIPSInst(x) & 0x001c0000) >> I_CACHEOP_SFT)

#define I_CACHESEL_SFT	16
#define MIPSInst_CACHESEL(x) ((MIPSInst(x) & 0x00030000) >> I_CACHESEL_SFT)

#define I_RD_SFT	11
#define MIPSInst_RD(x) ((MIPSInst(x) & 0x0000f800) >> I_RD_SFT)

#define I_RE_SFT	6
#define MIPSInst_RE(x) ((MIPSInst(x) & 0x000007c0) >> I_RE_SFT)

#define I_FUNC_SFT	0
#define MIPSInst_FUNC(x) (MIPSInst(x) & 0x0000003f)

#define I_FFMT_SFT	21
#define MIPSInst_FFMT(x) ((MIPSInst(x) & 0x01e00000) >> I_FFMT_SFT)

#define I_FT_SFT	16
#define MIPSInst_FT(x) ((MIPSInst(x) & 0x001f0000) >> I_FT_SFT)

#define I_FS_SFT	11
#define MIPSInst_FS(x) ((MIPSInst(x) & 0x0000f800) >> I_FS_SFT)

#define I_FD_SFT	6
#define MIPSInst_FD(x) ((MIPSInst(x) & 0x000007c0) >> I_FD_SFT)

#define I_FR_SFT	21
#define MIPSInst_FR(x) ((MIPSInst(x) & 0x03e00000) >> I_FR_SFT)

#define I_FMA_FUNC_SFT	2
#define MIPSInst_FMA_FUNC(x) ((MIPSInst(x) & 0x0000003c) >> I_FMA_FUNC_SFT)

#define I_FMA_FFMT_SFT	0
#define MIPSInst_FMA_FFMT(x) (MIPSInst(x) & 0x00000003)

#define REG_TO_VA_l (vaddr_t_l)
#define VA_TO_REG_l (unsigned long)

#define  CAUSEB_BD		31
#define  CAUSEF_BD		(1   << 31)


typedef unsigned int mips_instruction;

/*
 * Major opcodes; before MIPS IV cop1x was called cop3.
 */
enum major_op {
	spec_op, bcond_op, j_op, jal_op,
	beq_op, bne_op, blez_op, bgtz_op,
	addi_op, addiu_op, slti_op, sltiu_op,
	andi_op, ori_op, xori_op, lui_op,
	cop0_op, cop1_op, cop2_op, cop1x_op,
	beql_op, bnel_op, blezl_op, bgtzl_op,
	daddi_op, daddiu_op, ldl_op, ldr_op,
	major_1c_op, jalx_op, major_1e_op, major_1f_op,
	lb_op, lh_op, lwl_op, lw_op,
	lbu_op, lhu_op, lwr_op, lwu_op,
	sb_op, sh_op, swl_op, sw_op,
	sdl_op, sdr_op, swr_op, cache_op,
	ll_op, lwc1_op, lwc2_op, pref_op,
	lld_op, ldc1_op, ldc2_op, ld_op,
	sc_op, swc1_op, swc2_op, major_3b_op, /* Opcode 0x3b is unused */
	scd_op, sdc1_op, sdc2_op, sd_op
};

/*
 * func field of spec opcode.
 */
enum spec_op {
	sll_op, movc_op, srl_op, sra_op,
	sllv_op, srlv_op, srav_op, spec1_unused_op, /* Opcode 0x07 is unused */
	jr_op, jalr_op, movz_op, movn_op,
	syscall_op, break_op, spim_op, sync_op,
	mfhi_op, mthi_op, mflo_op, mtlo_op,
	dsllv_op, spec2_unused_op, dsrlv_op, dsrav_op,
	mult_op, multu_op, div_op, divu_op,
	dmult_op, dmultu_op, ddiv_op, ddivu_op,
	add_op, addu_op, sub_op, subu_op,
	and_op, or_op, xor_op, nor_op,
	spec3_unused_op, spec4_unused_op, slt_op, sltu_op,
	dadd_op, daddu_op, dsub_op, dsubu_op,
	tge_op, tgeu_op, tlt_op, tltu_op,
	teq_op, spec5_unused_op, tne_op, spec6_unused_op,
	dsll_op, spec7_unused_op, dsrl_op, dsra_op,
	dsll32_op, spec8_unused_op, dsrl32_op, dsra32_op
};

/*
 * rt field of bcond opcodes.
 */
enum rt_op {
	bltz_op, bgez_op, bltzl_op, bgezl_op,
	spimi_op, unused_rt_op_0x05, unused_rt_op_0x06, unused_rt_op_0x07,
	tgei_op, tgeiu_op, tlti_op, tltiu_op,
	teqi_op, unused_0x0d_rt_op, tnei_op, unused_0x0f_rt_op,
	bltzal_op, bgezal_op, bltzall_op, bgezall_op
	/*
	 * The others (0x14 - 0x1f) are unused.
 	 */
};

/*
 * rs field of cop opcodes.
 */
enum cop_op {
	mfc_op        = 0x00, dmfc_op       = 0x01,
	cfc_op        = 0x02, mtc_op        = 0x04,
	dmtc_op       = 0x05, ctc_op        = 0x06,
	bc_op         = 0x08, cop_op        = 0x10,
	copm_op       = 0x18
};

/*
 * rt field of cop.bc_op opcodes
 */

enum bcop_op {
	bcf_op, bct_op, bcfl_op, bctl_op
};

/*
 * func field of cop0 coi opcodes.
 */
enum cop0_coi_func {
	tlbr_op       = 0x01, tlbwi_op      = 0x02,
	tlbwr_op      = 0x06, tlbp_op       = 0x08,
	rfe_op        = 0x10, eret_op       = 0x18
};

/*
 * func field of cop0 com opcodes.
 */
enum cop0_com_func {
	tlbr1_op      = 0x01, tlbw_op       = 0x02,
	tlbp1_op      = 0x08, dctr_op       = 0x09,
	dctw_op       = 0x0a
};

/*
 * fmt field of cop1 opcodes.
 */
enum cop1_fmt {
	s_fmt, d_fmt, e_fmt, q_fmt,
	w_fmt, l_fmt
};

/*
 * func field of cop1 instructions using d, s or w format.
 */
enum cop1_sdw_func {
	fadd_op      =  0x00, fsub_op      =  0x01,
	fmul_op      =  0x02, fdiv_op      =  0x03,
	fsqrt_op     =  0x04, fabs_op      =  0x05,
	fmov_op      =  0x06, fneg_op      =  0x07,
	froundl_op   =  0x08, ftruncl_op   =  0x09,
	fceill_op    =  0x0a, ffloorl_op   =  0x0b,
	fround_op    =  0x0c, ftrunc_op    =  0x0d,
	fceil_op     =  0x0e, ffloor_op    =  0x0f,
	fmovc_op     =  0x11, fmovz_op     =  0x12,
	fmovn_op     =  0x13, frecip_op    =  0x15,
	frsqrt_op    =  0x16, fcvts_op     =  0x20,
	fcvtd_op     =  0x21, fcvte_op     =  0x22,
	fcvtw_op     =  0x24, fcvtl_op     =  0x25,
	fcmp_op      =  0x30
};

/*
 * func field of cop1x opcodes (MIPS IV).
 */
enum cop1x_func {
	lwxc1_op     =  0x00, ldxc1_op     =  0x01,
	pfetch_op    =  0x07, swxc1_op     =  0x08,
	sdxc1_op     =  0x09, madd_s_op    =  0x20,
	madd_d_op    =  0x21, madd_e_op    =  0x22,
	msub_s_op    =  0x28, msub_d_op    =  0x29,
	msub_e_op    =  0x2a, nmadd_s_op   =  0x30,
	nmadd_d_op   =  0x31, nmadd_e_op   =  0x32,
	nmsub_s_op   =  0x38, nmsub_d_op   =  0x39,
	nmsub_e_op   =  0x3a
};

/*
 * func field for mad opcodes (MIPS IV).
 */
enum mad_func {
	madd_op      = 0x08, msub_op      = 0x0a,
	nmadd_op     = 0x0c, nmsub_op     = 0x0e
};

struct pt_regs {
	/* Pad bytes for argument save space on the stack. */
	unsigned long pad0[6];

	/* Saved main processor registers. */
	unsigned long regs[32];

	/* Other saved registers. */
	unsigned long lo;
	unsigned long hi;

	/*
	 * saved cp0 registers
	 */
	unsigned long cp0_epc;
	unsigned long cp0_badvaddr;
	unsigned long cp0_status;
	unsigned long cp0_cause;
};

#define SIGHUP		 1	/* Hangup (POSIX).  */
#define SIGINT		 2	/* Interrupt (ANSI).  */
#define SIGQUIT		 3	/* Quit (POSIX).  */
#define SIGILL		 4	/* Illegal instruction (ANSI).  */
#define SIGTRAP		 5	/* Trace trap (POSIX).  */
#define SIGEMT		 7
#define SIGFPE		 8	/* Floating-point exception (ANSI).  */
#define SIGKILL		 9	/* Kill, unblockable (POSIX).  */
#define SIGBUS		10	/* BUS error (4.2 BSD).  */
#define SIGSEGV		11	/* Segmentation violation (ANSI).  */
#define SIGSYS		12
#define SIGPIPE		13	/* Broken pipe (POSIX).  */
#define SIGALRM		14	/* Alarm clock (POSIX).  */
#define SIGTERM		15	/* Termination (ANSI).  */
#define SIGCLD		SIGCHLD	/* Same as SIGCHLD (System V).  */
#define SIGPWR		19	/* Power failure restart (System V).  */
#define SIGPOLL		SIGIO	/* Pollable event occurred (System V).  */
//bjzheng 
#define check_axs(pc,a,s)                                \
	if ((long)(~(pc) & ((a) | ((a)+(s)))) < 0)      \
		return -1;
		
#define user_mode(regs) ((regs)->cp0_status & 0x10)
extern int do_ri(struct pt_regs *);