diff options
Diffstat (limited to 'include/asm-m68knommu/entry.h')
| -rw-r--r-- | include/asm-m68knommu/entry.h | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/include/asm-m68knommu/entry.h b/include/asm-m68knommu/entry.h deleted file mode 100644 index c2553d2..0000000 --- a/include/asm-m68knommu/entry.h +++ /dev/null @@ -1,182 +0,0 @@ -#ifndef __M68KNOMMU_ENTRY_H -#define __M68KNOMMU_ENTRY_H - -#include <asm/setup.h> -#include <asm/page.h> - -/* - * Stack layout in 'ret_from_exception': - * - * This allows access to the syscall arguments in registers d1-d5 - * - * 0(sp) - d1 - * 4(sp) - d2 - * 8(sp) - d3 - * C(sp) - d4 - * 10(sp) - d5 - * 14(sp) - a0 - * 18(sp) - a1 - * 1C(sp) - a2 - * 20(sp) - d0 - * 24(sp) - orig_d0 - * 28(sp) - stack adjustment - * 2C(sp) - [ sr ] [ format & vector ] - * 2E(sp) - [ pc-hiword ] [ sr ] - * 30(sp) - [ pc-loword ] [ pc-hiword ] - * 32(sp) - [ format & vector ] [ pc-loword ] - * ^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^ - * M68K COLDFIRE - */ - -#define ALLOWINT 0xf8ff - -#ifdef __ASSEMBLY__ - -/* process bits for task_struct.flags */ -PF_TRACESYS_OFF = 3 -PF_TRACESYS_BIT = 5 -PF_PTRACED_OFF = 3 -PF_PTRACED_BIT = 4 -PF_DTRACE_OFF = 1 -PF_DTRACE_BIT = 5 - -LENOSYS = 38 - -#define SWITCH_STACK_SIZE (6*4+4) /* Includes return address */ - -/* - * This defines the normal kernel pt-regs layout. - * - * regs are a2-a6 and d6-d7 preserved by C code - * the kernel doesn't mess with usp unless it needs to - */ - -#ifdef CONFIG_COLDFIRE -/* - * This is made a little more tricky on the ColdFire. There is no - * separate kernel and user stack pointers. Need to artificially - * construct a usp in software... When doing this we need to disable - * interrupts, otherwise bad things could happen. - */ -.macro SAVE_ALL - move #0x2700,%sr /* disable intrs */ - btst #5,%sp@(2) /* from user? */ - bnes 6f /* no, skip */ - movel %sp,sw_usp /* save user sp */ - addql #8,sw_usp /* remove exception */ - movel sw_ksp,%sp /* kernel sp */ - subql #8,%sp /* room for exception */ - clrl %sp@- /* stkadj */ - movel %d0,%sp@- /* orig d0 */ - movel %d0,%sp@- /* d0 */ - lea %sp@(-32),%sp /* space for 8 regs */ - moveml %d1-%d5/%a0-%a2,%sp@ - movel sw_usp,%a0 /* get usp */ - movel %a0@-,%sp@(PT_PC) /* copy exception program counter */ - movel %a0@-,%sp@(PT_FORMATVEC)/* copy exception format/vector/sr */ - bra 7f - 6: - clrl %sp@- /* stkadj */ - movel %d0,%sp@- /* orig d0 */ - movel %d0,%sp@- /* d0 */ - lea %sp@(-32),%sp /* space for 8 regs */ - moveml %d1-%d5/%a0-%a2,%sp@ - 7: -.endm - -.macro RESTORE_ALL - btst #5,%sp@(PT_SR) /* going user? */ - bnes 8f /* no, skip */ - move #0x2700,%sr /* disable intrs */ - movel sw_usp,%a0 /* get usp */ - movel %sp@(PT_PC),%a0@- /* copy exception program counter */ - movel %sp@(PT_FORMATVEC),%a0@-/* copy exception format/vector/sr */ - moveml %sp@,%d1-%d5/%a0-%a2 - lea %sp@(32),%sp /* space for 8 regs */ - movel %sp@+,%d0 - addql #4,%sp /* orig d0 */ - addl %sp@+,%sp /* stkadj */ - addql #8,%sp /* remove exception */ - movel %sp,sw_ksp /* save ksp */ - subql #8,sw_usp /* set exception */ - movel sw_usp,%sp /* restore usp */ - rte - 8: - moveml %sp@,%d1-%d5/%a0-%a2 - lea %sp@(32),%sp /* space for 8 regs */ - movel %sp@+,%d0 - addql #4,%sp /* orig d0 */ - addl %sp@+,%sp /* stkadj */ - rte -.endm - -/* - * Quick exception save, use current stack only. - */ -.macro SAVE_LOCAL - move #0x2700,%sr /* disable intrs */ - clrl %sp@- /* stkadj */ - movel %d0,%sp@- /* orig d0 */ - movel %d0,%sp@- /* d0 */ - lea %sp@(-32),%sp /* space for 8 regs */ - moveml %d1-%d5/%a0-%a2,%sp@ -.endm - -.macro RESTORE_LOCAL - moveml %sp@,%d1-%d5/%a0-%a2 - lea %sp@(32),%sp /* space for 8 regs */ - movel %sp@+,%d0 - addql #4,%sp /* orig d0 */ - addl %sp@+,%sp /* stkadj */ - rte -.endm - -.macro SAVE_SWITCH_STACK - lea %sp@(-24),%sp /* 6 regs */ - moveml %a3-%a6/%d6-%d7,%sp@ -.endm - -.macro RESTORE_SWITCH_STACK - moveml %sp@,%a3-%a6/%d6-%d7 - lea %sp@(24),%sp /* 6 regs */ -.endm - -/* - * Software copy of the user and kernel stack pointers... Ugh... - * Need these to get around ColdFire not having separate kernel - * and user stack pointers. - */ -.globl sw_usp -.globl sw_ksp - -#else /* !CONFIG_COLDFIRE */ - -/* - * Standard 68k interrupt entry and exit macros. - */ -.macro SAVE_ALL - clrl %sp@- /* stkadj */ - movel %d0,%sp@- /* orig d0 */ - movel %d0,%sp@- /* d0 */ - moveml %d1-%d5/%a0-%a2,%sp@- -.endm - -.macro RESTORE_ALL - moveml %sp@+,%a0-%a2/%d1-%d5 - movel %sp@+,%d0 - addql #4,%sp /* orig d0 */ - addl %sp@+,%sp /* stkadj */ - rte -.endm - -.macro SAVE_SWITCH_STACK - moveml %a3-%a6/%d6-%d7,%sp@- -.endm - -.macro RESTORE_SWITCH_STACK - moveml %sp@+,%a3-%a6/%d6-%d7 -.endm - -#endif /* !CONFIG_COLDFIRE */ -#endif /* __ASSEMBLY__ */ -#endif /* __M68KNOMMU_ENTRY_H */ |