1 /* pcb.h 4.4 81/02/26 */ 2 3 /* 4 * VAX process control block 5 */ 6 7 struct pcb 8 { 9 int pcb_ksp; /* kernel stack pointer */ 10 int pcb_esp; /* exec stack pointer */ 11 int pcb_ssp; /* supervisor stack pointer */ 12 int pcb_usp; /* user stack pointer */ 13 int pcb_r0; 14 int pcb_r1; 15 int pcb_r2; 16 int pcb_r3; 17 int pcb_r4; 18 int pcb_r5; 19 int pcb_r6; 20 int pcb_r7; 21 int pcb_r8; 22 int pcb_r9; 23 int pcb_r10; 24 int pcb_r11; 25 int pcb_r12; 26 int pcb_r13; 27 int pcb_pc; /* program counter */ 28 int pcb_psl; /* program status longword */ 29 struct pte *pcb_p0br; /* seg 0 base register */ 30 int pcb_p0lr; /* seg 0 length register and astlevel */ 31 struct pte *pcb_p1br; /* seg 1 base register */ 32 int pcb_p1lr; /* seg 1 length register and pme */ 33 /* 34 * Software pcb (extension) 35 */ 36 int pcb_szpt; /* number of pages of user page table */ 37 int pcb_cmap2; 38 int *pcb_sswap; 39 int pcb_sigc[3]; 40 }; 41 42 #define AST_NONE 0x04000000 /* ast level */ 43 #define AST_USER 0x03000000 /* ast for user mode */ 44 45 #define ASTLVL_NONE 4 46 #define ASTLVL_USER 3 47 48 #define AST_CLR 0x07000000 49 50 #define aston() \ 51 { \ 52 u.u_pcb.pcb_p0lr = (u.u_pcb.pcb_p0lr &~ AST_CLR) | AST_USER; \ 53 mtpr(ASTLVL, ASTLVL_USER); \ 54 } 55 56 #define astoff() \ 57 { \ 58 u.u_pcb.pcb_p0lr = (u.u_pcb.pcb_p0lr &~ AST_CLR) | AST_NONE; \ 59 mtpr(ASTLVL, ASTLVL_NONE); \ 60 } 61