projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| c8cccbb7 C |
1 | /* align.h 1.1 86/07/20 */ |
| 2 | ||
| 3 | #ifndef LOCORE | |
| 4 | /* | |
| 5 | * Some special registers definitions. | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef SLR | |
| 9 | #define SLR 1 | |
| 10 | #define P0LR 3 | |
| 11 | #define P1LR 5 | |
| 12 | #define P2LR 7 | |
| 13 | #endif | |
| 14 | ||
| 15 | #include "../tahoealign/defs.h" | |
| 16 | /* | |
| 17 | * Definitions about the stack frame as seen by the routine | |
| 18 | * 'alignment' in the kernel. If you ever wondered what's the | |
| 19 | * meaning of 'machine dependent code', look here :-) | |
| 20 | * This structure is partly set up by locore.s, for 'alignment', | |
| 21 | * and partly by the allocation of local variables in 'alignment.c' | |
| 22 | * itself. | |
| 23 | * All these things are passed between procedures on the | |
| 24 | * (current process' kernel) stack. The alternative (static | |
| 25 | * variables) is a little bit more elegant but it works fine | |
| 26 | * for one process only. Will not work for multiple processes | |
| 27 | * with alignment processing or for MP models of HW. | |
| 28 | * | |
| 29 | * WARNING : due to the intimate relationships involved, don't | |
| 30 | * change the process_info structure unless you also | |
| 31 | * change the alignment trap code in locore.s AND the | |
| 32 | * allocation of local variables in 'alignment.c' !! | |
| 33 | */ | |
| 34 | typedef struct { | |
| 35 | long Saved_sp; /* For exceptions */ | |
| 36 | long Saved_pc; | |
| 37 | long Last_operand; /* Last operand # processed */ | |
| 38 | long Opcode; /* 'offending' opcode */ | |
| 39 | struct oprnd Decoded[4]; | |
| 40 | long REG0; | |
| 41 | long REG1; | |
| 42 | long REG2; | |
| 43 | long REG3; | |
| 44 | long REG4; | |
| 45 | long REG5; | |
| 46 | long REG6; | |
| 47 | long REG7; | |
| 48 | long REG8; | |
| 49 | long REG9; | |
| 50 | long REG10; | |
| 51 | long REG11; | |
| 52 | long REG12; | |
| 53 | long return_pc; /* Points into locore.s */ | |
| 54 | long mask_restored; | |
| 55 | long REG13; /* Original, from the process */ | |
| 56 | long Sp; /* Alias R14 */ | |
| 57 | long ret_code; | |
| 58 | long ret_addr; | |
| 59 | long ret_exception; /* To tell locore.s about problems */ | |
| 60 | long Ach; | |
| 61 | long Acl; | |
| 62 | unsigned unused:30; | |
| 63 | unsigned pcb_acc_pnt:1; | |
| 64 | unsigned acc_dbl:1; | |
| 65 | long Pc; /* Alias R15 */ | |
| 66 | long Psl; | |
| 67 | } process_info; | |
| 68 | ||
| 69 | #define saved_pc (infop->Saved_pc) | |
| 70 | #define saved_sp (infop->Saved_sp) | |
| 71 | #define last_operand (infop->Last_operand) | |
| 72 | #define opCODE (infop->Opcode) | |
| 73 | #define decoded (infop->Decoded) | |
| 74 | #define r0 (infop->REG0) | |
| 75 | #define r1 (infop->REG1) | |
| 76 | #define r2 (infop->REG2) | |
| 77 | #define r3 (infop->REG3) | |
| 78 | #define r4 (infop->REG4) | |
| 79 | #define r5 (infop->REG5) | |
| 80 | #define r6 (infop->REG6) | |
| 81 | #define r7 (infop->REG7) | |
| 82 | #define r8 (infop->REG8) | |
| 83 | #define r9 (infop->REG9) | |
| 84 | #define r10 (infop->REG10) | |
| 85 | #define r11 (infop->REG11) | |
| 86 | #define r12 (infop->REG12) | |
| 87 | #define r13 (infop->REG13) | |
| 88 | #define fp (infop->REG13) | |
| 89 | #define sp (infop->Sp) | |
| 90 | #define acc_high (infop->Ach) | |
| 91 | #define acc_low (infop->Acl) | |
| 92 | #define pc (infop->Pc) | |
| 93 | #define psl (infop->Psl) | |
| 94 | ||
| 95 | #define PCOUNTER 15 | |
| 96 | #define SPOINTER 14 | |
| 97 | ||
| 98 | ||
| 99 | /* | |
| 100 | * Setting new condition codes for the process. | |
| 101 | #define Set_psl(z) asm(" movl z,r6"); \ | |
| 102 | asm(" andl2 $15,r6"); \ | |
| 103 | asm(" mnegl $1,r7"); \ | |
| 104 | asm(" xorl2 r6,r7"); \ | |
| 105 | asm(" andl2 $15,r7"); \ | |
| 106 | asm(" bicpsw r7"); \ | |
| 107 | asm(" bispsw r6") | |
| 108 | */ | |
| 109 | #define Set_psl(z) asm(" andl2 $15,z"); \ | |
| 110 | asm(" mnegl $1,r6"); \ | |
| 111 | asm(" xorl2 z,r6"); \ | |
| 112 | asm(" andl2 $15,r6"); \ | |
| 113 | asm(" bicpsw r6"); \ | |
| 114 | asm(" bispsw z") | |
| 115 | #define New_cc(x) (x) &= PSL_ALLCC; psl = psl & ~PSL_ALLCC | (x) | |
| 116 | ||
| 117 | #endif | |
| 118 | ||
| 119 | /* | |
| 120 | * Definitions for ret_code. NOTE : DON"T USE 0 !! locore.s knows that | |
| 121 | * 0 means OK, no problems ! | |
| 122 | */ | |
| 123 | ||
| 124 | #define ILL_ADDRMOD 1 | |
| 125 | #define ILL_ACCESS 2 | |
| 126 | #define ILL_OPRND 3 | |
| 127 | #define ARITHMETIC 4 | |
| 128 | #define ALIGNMENT 5 | |
| 129 | ||
| 130 | /* | |
| 131 | * For use in u.u_eosys as a flag. | |
| 132 | */ | |
| 133 | #define EMULATEALIGN 0x80 |