projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __M68K_ENTRY_H |
| 2 | #define __M68K_ENTRY_H | |
| 3 | ||
| 1da177e4 LT |
4 | #include <asm/setup.h> |
| 5 | #include <asm/page.h> | |
| 6 | ||
| 7 | /* | |
| 8 | * Stack layout in 'ret_from_exception': | |
| 9 | * | |
| 10 | * This allows access to the syscall arguments in registers d1-d5 | |
| 11 | * | |
| 12 | * 0(sp) - d1 | |
| 13 | * 4(sp) - d2 | |
| 14 | * 8(sp) - d3 | |
| 15 | * C(sp) - d4 | |
| 16 | * 10(sp) - d5 | |
| 17 | * 14(sp) - a0 | |
| 18 | * 18(sp) - a1 | |
| 19 | * 1C(sp) - a2 | |
| 20 | * 20(sp) - d0 | |
| 21 | * 24(sp) - orig_d0 | |
| 22 | * 28(sp) - stack adjustment | |
| 23 | * 2C(sp) - sr | |
| 24 | * 2E(sp) - pc | |
| 25 | * 32(sp) - format & vector | |
| 26 | */ | |
| 27 | ||
| 28 | /* | |
| 29 | * 97/05/14 Andreas: Register %a2 is now set to the current task throughout | |
| 30 | * the whole kernel. | |
| 31 | */ | |
| 32 | ||
| 33 | /* the following macro is used when enabling interrupts */ | |
| 29c8a246 | 34 | #if defined(MACH_ATARI_ONLY) |
| 1da177e4 LT |
35 | /* block out HSYNC on the atari */ |
| 36 | #define ALLOWINT (~0x400) | |
| 37 | #define MAX_NOINT_IPL 3 | |
| 38 | #else | |
| 39 | /* portable version */ | |
| 40 | #define ALLOWINT (~0x700) | |
| 41 | #define MAX_NOINT_IPL 0 | |
| 42 | #endif /* machine compilation types */ | |
| 43 | ||
| 44 | #ifdef __ASSEMBLY__ | |
| 45 | ||
| 46 | #define curptr a2 | |
| 47 | ||
| 48 | LFLUSH_I_AND_D = 0x00000808 | |
| 49 | LSIGTRAP = 5 | |
| 50 | ||
| 51 | /* process bits for task_struct.ptrace */ | |
| 52 | PT_TRACESYS_OFF = 3 | |
| 53 | PT_TRACESYS_BIT = 1 | |
| 54 | PT_PTRACED_OFF = 3 | |
| 55 | PT_PTRACED_BIT = 0 | |
| 56 | PT_DTRACE_OFF = 3 | |
| 57 | PT_DTRACE_BIT = 2 | |
| 58 | ||
| 59 | #define SAVE_ALL_INT save_all_int | |
| 60 | #define SAVE_ALL_SYS save_all_sys | |
| 61 | #define RESTORE_ALL restore_all | |
| 62 | /* | |
| 63 | * This defines the normal kernel pt-regs layout. | |
| 64 | * | |
| 65 | * regs a3-a6 and d6-d7 are preserved by C code | |
| 66 | * the kernel doesn't mess with usp unless it needs to | |
| 67 | */ | |
| 68 | ||
| 69 | /* | |
| 70 | * a -1 in the orig_d0 field signifies | |
| 71 | * that the stack frame is NOT for syscall | |
| 72 | */ | |
| 73 | .macro save_all_int | |
| 74 | clrl %sp@- | stk_adj | |
| 75 | pea -1:w | orig d0 | |
| 76 | movel %d0,%sp@- | d0 | |
| 77 | moveml %d1-%d5/%a0-%a1/%curptr,%sp@- | |
| 78 | .endm | |
| 79 | ||
| 80 | .macro save_all_sys | |
| 81 | clrl %sp@- | stk_adj | |
| 82 | movel %d0,%sp@- | orig d0 | |
| 83 | movel %d0,%sp@- | d0 | |
| 84 | moveml %d1-%d5/%a0-%a1/%curptr,%sp@- | |
| 85 | .endm | |
| 86 | ||
| 87 | .macro restore_all | |
| 88 | moveml %sp@+,%a0-%a1/%curptr/%d1-%d5 | |
| 89 | movel %sp@+,%d0 | |
| 90 | addql #4,%sp | orig d0 | |
| 91 | addl %sp@+,%sp | stk adj | |
| 92 | rte | |
| 93 | .endm | |
| 94 | ||
| 95 | #define SWITCH_STACK_SIZE (6*4+4) /* includes return address */ | |
| 96 | ||
| 97 | #define SAVE_SWITCH_STACK save_switch_stack | |
| 98 | #define RESTORE_SWITCH_STACK restore_switch_stack | |
| 99 | #define GET_CURRENT(tmp) get_current tmp | |
| 100 | ||
| 101 | .macro save_switch_stack | |
| 102 | moveml %a3-%a6/%d6-%d7,%sp@- | |
| 103 | .endm | |
| 104 | ||
| 105 | .macro restore_switch_stack | |
| 106 | moveml %sp@+,%a3-%a6/%d6-%d7 | |
| 107 | .endm | |
| 108 | ||
| 109 | .macro get_current reg=%d0 | |
| 110 | movel %sp,\reg | |
| 111 | andw #-THREAD_SIZE,\reg | |
| 112 | movel \reg,%curptr | |
| 113 | movel %curptr@,%curptr | |
| 114 | .endm | |
| 115 | ||
| 116 | #else /* C source */ | |
| 117 | ||
| 118 | #define STR(X) STR1(X) | |
| 119 | #define STR1(X) #X | |
| 120 | ||
| 121 | #define PT_OFF_ORIG_D0 0x24 | |
| 122 | #define PT_OFF_FORMATVEC 0x32 | |
| 123 | #define PT_OFF_SR 0x2C | |
| 124 | #define SAVE_ALL_INT \ | |
| 125 | "clrl %%sp@-;" /* stk_adj */ \ | |
| 126 | "pea -1:w;" /* orig d0 = -1 */ \ | |
| 127 | "movel %%d0,%%sp@-;" /* d0 */ \ | |
| 128 | "moveml %%d1-%%d5/%%a0-%%a2,%%sp@-" | |
| 129 | #define GET_CURRENT(tmp) \ | |
| 130 | "movel %%sp,"#tmp"\n\t" \ | |
| 131 | "andw #-"STR(THREAD_SIZE)","#tmp"\n\t" \ | |
| 132 | "movel "#tmp",%%a2\n\t" \ | |
| 133 | "movel %%a2@,%%a2" | |
| 134 | ||
| 135 | #endif | |
| 136 | ||
| 137 | #endif /* __M68K_ENTRY_H */ |