diff options
Diffstat (limited to 'sys/arch/mvme88k/machine/pcb.h')
| -rw-r--r-- | sys/arch/mvme88k/machine/pcb.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/sys/arch/mvme88k/machine/pcb.h b/sys/arch/mvme88k/machine/pcb.h new file mode 100644 index 00000000000..65437b1718a --- /dev/null +++ b/sys/arch/mvme88k/machine/pcb.h @@ -0,0 +1,152 @@ +/* + * Copyright (c) 1996 Nivas Madhur + * Mach Operating System + * Copyright (c) 1993-1992 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * Motorola 88100 pcb definitions + * + */ +/* + */ +#ifndef _PCB_H_ +#define _PCB_H_ + +/* + * Our PCB is the regular PCB+Save area for kernel frame. + * Upon entering kernel mode from user land, save the user context + * in the saved_state area - this is passed as the exception frame. + * On a context switch, only registers that need to be saved by the + * C calling convention and few other regs (pc, psr etc) are saved + * in the kernel_state part of the PCB. Typically, trap fames are + * save on the stack (by low level handlers or by hardware) but, + * we just decided to do it in the PCB. + */ + +/* + * This must always be an even number of words long so that our stack + * will always be properly aligned (88k need 8 byte alignmet). Also, + * place r14 on double word boundary so that we can use st.d while + * saving the regs. + */ + +struct m88100_pcb { + unsigned pcb_pc; /* address to return */ + unsigned pcb_ipl; + unsigned pcb_r14; + unsigned pcb_r15; + unsigned pcb_r16; + unsigned pcb_r17; + unsigned pcb_r18; + unsigned pcb_r19; + unsigned pcb_r20; + unsigned pcb_r21; + unsigned pcb_r22; + unsigned pcb_r23; + unsigned pcb_r24; + unsigned pcb_r25; + unsigned pcb_r26; + unsigned pcb_r27; + unsigned pcb_r28; + unsigned pcb_r29; + unsigned pcb_r30; + unsigned pcb_sp; /* kernel stack pointer */ +}; + + +/* + * m88100_saved_state this structure corresponds to the state + * of the user registers as saved on the + * stack upon kernel entry. This structure + * is used internally only. Since this + * structure may change from version to + * version, it is hidden from the user. + */ + +/* This must always be an even number of words long */ + +struct m88100_saved_state { + unsigned r[32]; + unsigned fpsr; + unsigned fpcr; + unsigned epsr; + unsigned sxip; + unsigned snip; + unsigned sfip; + unsigned ssbr; + unsigned dmt0; + unsigned dmd0; + unsigned dma0; + unsigned dmt1; + unsigned dmd1; + unsigned dma1; + unsigned dmt2; + unsigned dmd2; + unsigned dma2; + unsigned fpecr; + unsigned fphs1; + unsigned fpls1; + unsigned fphs2; + unsigned fpls2; + unsigned fppt; + unsigned fprh; + unsigned fprl; + unsigned fpit; + unsigned vector; /* exception vector number */ + unsigned mask; /* interrupt mask level */ + unsigned mode; /* interrupt mode */ + unsigned scratch1; /* used by locore trap handling code */ + unsigned ipfsr; /* P BUS status - used in inst fault handling */ + unsigned dpfsr; /* P BUS status - used in data fault handling */ + unsigned pad; /* alignment */ +}; + +#define trapframe m88100_saved_state + +struct pcb +{ + struct m88100_pcb kernel_state; + struct m88100_saved_state user_state; + int pcb_onfault; /* for copyin/copyout faults */ + int pcb_pad; /* pad it XXX */ +}; + +typedef struct pcb *pcb_t; /* exported */ + +/* + * Location of saved user registers for the proc. + */ +#define USER_REGS(p) \ + (((struct m88100_saved_state *) (&((p)->p_addr->u_pcb.user_state)))) +/* + * The pcb is augmented with machine-dependent additional data for + * core dumps. Note that the trapframe here is a copy of the one + * from the top of the kernel stack (included here so that the kernel + * stack itself need not be dumped). + */ +struct md_coredump { + struct trapframe md_tf; +}; + +#endif _PCB_H_ |