diff options
Diffstat (limited to 'arch/m68k/include/asm/entry_no.h')
| -rw-r--r-- | arch/m68k/include/asm/entry_no.h | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/arch/m68k/include/asm/entry_no.h b/arch/m68k/include/asm/entry_no.h deleted file mode 100644 index 627d69b..0000000 --- a/arch/m68k/include/asm/entry_no.h +++ /dev/null @@ -1,181 +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 (~0x700) - -#ifdef __ASSEMBLY__ - -#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 -#ifdef CONFIG_COLDFIRE_SW_A7 -/* - * This is made a little more tricky on older ColdFires. There is no - * separate supervisor and user stack pointers. Need to artificially - * construct a usp in software... When doing this we need to disable - * interrupts, otherwise bad things will happen. - */ -.globl sw_usp -.globl sw_ksp - -.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_OFF_PC) /* copy exception program counter */ - movel %a0@-,%sp@(PT_OFF_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_USER - move #0x2700,%sr /* disable intrs */ - movel sw_usp,%a0 /* get usp */ - movel %sp@(PT_OFF_PC),%a0@- /* copy exception program counter */ - movel %sp@(PT_OFF_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 -.endm - -.macro RDUSP - movel sw_usp,%a2 -.endm - -.macro WRUSP - movel %a0,sw_usp -.endm - -#else /* !CONFIG_COLDFIRE_SW_A7 */ -/* - * Modern ColdFire parts have separate supervisor and user stack - * pointers. Simple load and restore macros for this case. - */ -.macro SAVE_ALL - 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_USER - 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 RDUSP - /*move %usp,%a2*/ - .word 0x4e6a -.endm - -.macro WRUSP - /*move %a0,%usp*/ - .word 0x4e60 -.endm - -#endif /* !CONFIG_COLDFIRE_SW_A7 */ - -.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 - -#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 /* !COLDFIRE_SW_A7 */ -#endif /* __ASSEMBLY__ */ -#endif /* __M68KNOMMU_ENTRY_H */ |