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    Length: 2353 (0x931)
    Types: TextFile
    Notes: @(#)pcb.h 13.1  (RC Computer) 91/02/02  */
    Names: »pcb.h«

└─⟦50656ff4a⟧ Bits:30010538 TX 3.1 Coldstart
    └─⟦bbf173f5c⟧ »0004« 
        └─⟦this⟧ »./usr/include/rc/pcb.h« 

TextFile

/*   @(#)pcb.h	13.1  (RC Computer) 91/02/02  */

/*
 * RC9000 process control block
 * MUST be first element of upage
 */
#ifndef	_PCB_
#define _PCB_

/*
 * pcb_regs indices
 */
#define	PCB_S0		0	/* callee saved regs.... */
#define	PCB_S1		1
#define	PCB_S2		2
#define	PCB_S3		3
#define	PCB_S4		4
#define	PCB_S5		5
#define	PCB_S6		6
#define	PCB_S7		7
#define	PCB_SP		8	/* stack pointer */
#define	PCB_FP		9	/* frame pointer */
#define	PCB_PC		10	/* program counter */
#define	PCB_SR		11	/* C0 status register */
#define	NPCBREGS	12	/* number of regs saved at ctxt switch */

/*
 * jmp_buf offsets
 * WARNING:
 * if this changes, label_t in types.h must change
 */
#define	JB_S0		0	/* callee saved regs.... */
#define	JB_S1		1
#define	JB_S2		2
#define	JB_S3		3
#define	JB_S4		4
#define	JB_S5		5
#define	JB_S6		6
#define	JB_S7		7
#define	JB_SP		8	/* stack pointer */
#define	JB_FP		9	/* frame pointer */
#define	JB_PC		10	/* program counter */
#define	JB_SR		11	/* C0 status register */
#define	NJBREGS		12

#if defined(LANGUAGE_C)

struct pcb
{
	/*
	 * General purpose registers saved at context switch time.
	 *
	 * NOTE: current switch assembler code assumes that pcb is first
	 * entry in u area, and that pcb_regs is the first thing in the
	 * pcb.
	 */
	int	pcb_regs[32];
	int	pcb_pc;
	int	pcb_sr;
	/*
	 * Misc.
	 */
	int	*pcb_sswap;	/* ptr for non-local resume */
	int	pcb_astpend;	/* non-zero if ast-trap wanted */
	/* These are use in branch delay instruction emulation */
	int	pcb_bd_epc;	/* epc register */
	int	pcb_bd_cause;	/* cause register */
	int	pcb_bd_ra;	/* address to return to if doing bd emulation */
	int	pcb_bd_instr;	/* the branch instr for the bd emulation */
	/* This is use in fp instruction emulation */
	int	pcb_softfp_pc;	/* resulting pc after fp emulation */
	/*
	 * Space for the state of all the potential coprocessors. WASTEFUL!
	 */
	int	pcb_fpregs[32];	/* floating point */
	int	pcb_fpc_csr;	/* floating point control and status reg */
	int	pcb_fpc_eir;	/* floating point exception instruction reg */
	int	pcb_ownedfp;	/* has owned fp at one time */
	int	pcb_c2regs[32];	/* TBD */
	int	pcb_c3regs[32];	/* TBD */
};

#define	aston(i)	(u.u_pcb.pcb_astpend |= (i))
#define astoff(i)	(u.u_pcb.pcb_astpend &= ~(i))

#endif define(LANGUAGE_C)

#define	ASTSOWEUPC	0x0001
#define	ASTRUNRUN	0x0002
#define	ASTSIG		0x0004
#endif