1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)pcb.h 7.1 (Berkeley) 06/05/86 7 */ 8 9 /* 10 * VAX process control block 11 */ 12 13 struct pcb 14 { 15 int pcb_ksp; /* kernel stack pointer */ 16 int pcb_esp; /* exec stack pointer */ 17 int pcb_ssp; /* supervisor stack pointer */ 18 int pcb_usp; /* user stack pointer */ 19 int pcb_r0; 20 int pcb_r1; 21 int pcb_r2; 22 int pcb_r3; 23 int pcb_r4; 24 int pcb_r5; 25 int pcb_r6; 26 int pcb_r7; 27 int pcb_r8; 28 int pcb_r9; 29 int pcb_r10; 30 int pcb_r11; 31 int pcb_r12; 32 #define pcb_ap pcb_r12 33 int pcb_r13; 34 #define pcb_fp pcb_r13 35 int pcb_pc; /* program counter */ 36 int pcb_psl; /* program status longword */ 37 struct pte *pcb_p0br; /* seg 0 base register */ 38 int pcb_p0lr; /* seg 0 length register and astlevel */ 39 struct pte *pcb_p1br; /* seg 1 base register */ 40 int pcb_p1lr; /* seg 1 length register and pme */ 41 /* 42 * Software pcb (extension) 43 */ 44 int pcb_szpt; /* number of pages of user page table */ 45 int pcb_cmap2; 46 int *pcb_sswap; 47 int pcb_sigc[5]; 48 }; 49 50 #define AST_NONE 0x04000000 /* ast level */ 51 #define AST_USER 0x03000000 /* ast for user mode */ 52 53 #define ASTLVL_NONE 4 54 #define ASTLVL_USER 3 55 56 #define AST_CLR 0x07000000 57 #define PME_CLR 0x80000000 58 59 #define aston() \ 60 { \ 61 mtpr(ASTLVL, ASTLVL_USER); \ 62 } 63 64 #define astoff() \ 65 { \ 66 mtpr(ASTLVL, ASTLVL_NONE); \ 67 } 68