/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __M68K_ENTRY_H #define __M68K_ENTRY_H #include <asm/setup.h> #include <asm/page.h> #ifdef __ASSEMBLY__ #include <asm/thread_info.h> #endif /* * 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 */ /* the following macro is used when enabling interrupts */ #if defined(MACH_ATARI_ONLY) /* block out HSYNC = ipl 2 on the atari */ #define ALLOWINT (~0x500) #else /* portable version */ #define ALLOWINT (~0x700) #endif /* machine compilation types */ #ifdef __ASSEMBLY__ /* * This defines the normal kernel pt-regs layout. * * regs a3-a6 and d6-d7 are preserved by C code * the kernel doesn't mess with usp unless it needs to */ #define SWITCH_STACK_SIZE (6*4+4) /* includes return address */ #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_SYS 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 SAVE_ALL_INT SAVE_ALL_SYS moveq #-1,%d0 /* not system call entry */ movel %d0,%sp@(PT_OFF_ORIG_D0) .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,%a3 .endm .macro WRUSP movel %a3,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_SYS 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 SAVE_ALL_INT move #0x2700,%sr /* disable intrs */ clrl %sp@- /* stkadj */ pea -1:w /* 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,%a3*/ .word 0x4e6b .endm .macro WRUSP /*move %a3,%usp*/ .word 0x4e63 .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 */ /* * All other types of m68k parts (68000, 680x0, CPU32) have the same * entry and exit code. */ /* * a -1 in the orig_d0 field signifies * that the stack frame is NOT for syscall */ .macro SAVE_ALL_INT clrl %sp@- /* stk_adj */ pea -1:w /* orig d0 */ movel %d0,%sp@- /* d0 */ moveml %d1-%d5/%a0-%a2,%sp@- .endm .macro SAVE_ALL_SYS clrl %sp@- /* stk_adj */ 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 /* stk adj */ 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 */ /* * Register %a2 is reserved and set to current task on MMU enabled systems. * Non-MMU systems do not reserve %a2 in this way, and this definition is * not used for them. */ #ifdef CONFIG_MMU #define curptr a2 #define GET_CURRENT(tmp) get_current tmp .macro get_current reg=%d0 movel %sp,\reg andl #-THREAD_SIZE,\reg movel \reg,%curptr movel %curptr@,%curptr .endm #else #define GET_CURRENT(tmp) #endif /* CONFIG_MMU */ #else /* C source */ #define STR(X) STR1(X) #define STR1(X) #X #define SAVE_ALL_INT \ "clrl %%sp@-;" /* stk_adj */ \ "pea -1:w;" /* orig d0 = -1 */ \ "movel %%d0,%%sp@-;" /* d0 */ \ "moveml %%d1-%%d5/%%a0-%%a2,%%sp@-" #define GET_CURRENT(tmp) \ "movel %%sp,"#tmp"\n\t" \ "andw #-"STR(THREAD_SIZE)","#tmp"\n\t" \ "movel "#tmp",%%a2\n\t" \ "movel %%a2@,%%a2" #endif #endif /* __M68K_ENTRY_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 599 B | 0644 |
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MC68328.h | File | 37.82 KB | 0644 |
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MC68EZ328.h | File | 37.74 KB | 0644 |
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MC68VZ328.h | File | 41.02 KB | 0644 |
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a.out-core.h | File | 1.98 KB | 0644 |
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adb_iop.h | File | 1.09 KB | 0644 |
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amigahw.h | File | 10.49 KB | 0644 |
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amigaints.h | File | 3.5 KB | 0644 |
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amigayle.h | File | 3.19 KB | 0644 |
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amipcmcia.h | File | 2.51 KB | 0644 |
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apollohw.h | File | 2.35 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 211 B | 0644 |
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atafd.h | File | 300 B | 0644 |
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atafdreg.h | File | 2.68 KB | 0644 |
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atari_joystick.h | File | 457 B | 0644 |
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atari_stdma.h | File | 514 B | 0644 |
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atari_stram.h | File | 528 B | 0644 |
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atarihw.h | File | 20.3 KB | 0644 |
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atariints.h | File | 5.56 KB | 0644 |
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atarikb.h | File | 1.4 KB | 0644 |
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atomic.h | File | 4.86 KB | 0644 |
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bitops.h | File | 12.19 KB | 0644 |
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blinken.h | File | 641 B | 0644 |
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bootinfo.h | File | 783 B | 0644 |
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bootstd.h | File | 4.64 KB | 0644 |
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bug.h | File | 659 B | 0644 |
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bugs.h | File | 369 B | 0644 |
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bvme6000hw.h | File | 3.45 KB | 0644 |
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cache.h | File | 296 B | 0644 |
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cacheflush.h | File | 133 B | 0644 |
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cacheflush_mm.h | File | 6.92 KB | 0644 |
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cacheflush_no.h | File | 2.61 KB | 0644 |
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checksum.h | File | 3.4 KB | 0644 |
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cmpxchg.h | File | 3.34 KB | 0644 |
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coldfire.h | File | 1.61 KB | 0644 |
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contregs.h | File | 3.31 KB | 0644 |
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current.h | File | 580 B | 0644 |
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delay.h | File | 3.43 KB | 0644 |
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div64.h | File | 858 B | 0644 |
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dma-mapping.h | File | 291 B | 0644 |
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dma.h | File | 16.65 KB | 0644 |
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dsp56k.h | File | 1.24 KB | 0644 |
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dvma.h | File | 9.67 KB | 0644 |
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elf.h | File | 3.07 KB | 0644 |
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entry.h | File | 5.76 KB | 0644 |
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export.h | File | 74 B | 0644 |
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fb.h | File | 921 B | 0644 |
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fbio.h | File | 9.87 KB | 0644 |
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flat.h | File | 1.02 KB | 0644 |
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floppy.h | File | 5.06 KB | 0644 |
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fpu.h | File | 535 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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gpio.h | File | 2.64 KB | 0644 |
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hardirq.h | File | 594 B | 0644 |
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hash.h | File | 2.07 KB | 0644 |
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hp300hw.h | File | 186 B | 0644 |
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hwtest.h | File | 467 B | 0644 |
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ide.h | File | 1.67 KB | 0644 |
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idprom.h | File | 725 B | 0644 |
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intersil.h | File | 1.11 KB | 0644 |
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io.h | File | 383 B | 0644 |
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io_mm.h | File | 16.19 KB | 0644 |
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io_no.h | File | 5.26 KB | 0644 |
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irq.h | File | 2.57 KB | 0644 |
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irqflags.h | File | 1.61 KB | 0644 |
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kexec.h | File | 732 B | 0644 |
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linkage.h | File | 1.55 KB | 0644 |
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m5206sim.h | File | 6.4 KB | 0644 |
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m520xsim.h | File | 7.15 KB | 0644 |
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m523xsim.h | File | 7.7 KB | 0644 |
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m525xsim.h | File | 10.57 KB | 0644 |
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m5272sim.h | File | 6.05 KB | 0644 |
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m527xsim.h | File | 13.51 KB | 0644 |
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m528xsim.h | File | 9.37 KB | 0644 |
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m52xxacr.h | File | 3.57 KB | 0644 |
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m5307sim.h | File | 7.52 KB | 0644 |
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m53xxacr.h | File | 3.6 KB | 0644 |
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m53xxsim.h | File | 53.97 KB | 0644 |
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m5407sim.h | File | 6.14 KB | 0644 |
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m5441xsim.h | File | 8.5 KB | 0644 |
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m54xxacr.h | File | 4.82 KB | 0644 |
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m54xxgpt.h | File | 3.66 KB | 0644 |
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m54xxpci.h | File | 6.13 KB | 0644 |
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m54xxsim.h | File | 3.8 KB | 0644 |
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mac_asc.h | File | 520 B | 0644 |
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mac_baboon.h | File | 999 B | 0644 |
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mac_iop.h | File | 5.37 KB | 0644 |
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mac_oss.h | File | 1.83 KB | 0644 |
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mac_psc.h | File | 7.25 KB | 0644 |
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mac_via.h | File | 11.44 KB | 0644 |
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machdep.h | File | 1.34 KB | 0644 |
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machines.h | File | 3.13 KB | 0644 |
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machw.h | File | 588 B | 0644 |
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macintosh.h | File | 2.02 KB | 0644 |
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macints.h | File | 3.28 KB | 0644 |
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math-emu.h | File | 6.74 KB | 0644 |
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mc146818rtc.h | File | 598 B | 0644 |
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mcf8390.h | File | 3.75 KB | 0644 |
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mcf_pgalloc.h | File | 2.37 KB | 0644 |
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mcf_pgtable.h | File | 9.89 KB | 0644 |
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mcfclk.h | File | 1.01 KB | 0644 |
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mcfdma.h | File | 6.51 KB | 0644 |
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mcfgpio.h | File | 8.48 KB | 0644 |
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mcfintc.h | File | 3.09 KB | 0644 |
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mcfmmu.h | File | 3.67 KB | 0644 |
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mcfpit.h | File | 2.22 KB | 0644 |
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mcfqspi.h | File | 1.82 KB | 0644 |
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mcfsim.h | File | 1.5 KB | 0644 |
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mcfslt.h | File | 1.21 KB | 0644 |
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mcftimer.h | File | 2.3 KB | 0644 |
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mcfuart.h | File | 6.91 KB | 0644 |
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mcfwdebug.h | File | 4.99 KB | 0644 |
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mmu.h | File | 243 B | 0644 |
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mmu_context.h | File | 7.2 KB | 0644 |
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mmzone.h | File | 264 B | 0644 |
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module.h | File | 847 B | 0644 |
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motorola_pgalloc.h | File | 2.26 KB | 0644 |
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motorola_pgtable.h | File | 9.2 KB | 0644 |
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movs.h | File | 1.44 KB | 0644 |
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mvme147hw.h | File | 2.81 KB | 0644 |
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mvme16xhw.h | File | 2.16 KB | 0644 |
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natfeat.h | File | 533 B | 0644 |
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nettel.h | File | 2.95 KB | 0644 |
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nubus.h | File | 1.21 KB | 0644 |
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openprom.h | File | 7.98 KB | 0644 |
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oplib.h | File | 9.54 KB | 0644 |
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page.h | File | 1.47 KB | 0644 |
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page_mm.h | File | 4.06 KB | 0644 |
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page_no.h | File | 1.28 KB | 0644 |
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page_offset.h | File | 256 B | 0644 |
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parport.h | File | 837 B | 0644 |
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pci.h | File | 458 B | 0644 |
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pgalloc.h | File | 444 B | 0644 |
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pgtable.h | File | 127 B | 0644 |
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pgtable_mm.h | File | 4.84 KB | 0644 |
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pgtable_no.h | File | 1.57 KB | 0644 |
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processor.h | File | 3.59 KB | 0644 |
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ptrace.h | File | 643 B | 0644 |
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q40_master.h | File | 2.28 KB | 0644 |
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q40ints.h | File | 749 B | 0644 |
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quicc_simple.h | File | 1.79 KB | 0644 |
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raw_io.h | File | 11.41 KB | 0644 |
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segment.h | File | 1.42 KB | 0644 |
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serial.h | File | 1.14 KB | 0644 |
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setup.h | File | 9.25 KB | 0644 |
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signal.h | File | 1.34 KB | 0644 |
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smp.h | File | 32 B | 0644 |
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string.h | File | 1.68 KB | 0644 |
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sun3-head.h | File | 353 B | 0644 |
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sun3_pgalloc.h | File | 2.26 KB | 0644 |
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sun3_pgtable.h | File | 7.65 KB | 0644 |
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sun3ints.h | File | 989 B | 0644 |
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sun3mmu.h | File | 4.91 KB | 0644 |
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sun3x.h | File | 868 B | 0644 |
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sun3xflop.h | File | 5.62 KB | 0644 |
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sun3xprom.h | File | 1.31 KB | 0644 |
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switch_to.h | File | 1.51 KB | 0644 |
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thread_info.h | File | 2.02 KB | 0644 |
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timex.h | File | 974 B | 0644 |
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tlb.h | File | 486 B | 0644 |
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tlbflush.h | File | 5.95 KB | 0644 |
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traps.h | File | 8.33 KB | 0644 |
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uaccess.h | File | 152 B | 0644 |
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uaccess_mm.h | File | 10.31 KB | 0644 |
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uaccess_no.h | File | 3.69 KB | 0644 |
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ucontext.h | File | 570 B | 0644 |
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unaligned.h | File | 600 B | 0644 |
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unistd.h | File | 952 B | 0644 |
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user.h | File | 3.78 KB | 0644 |
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vga.h | File | 651 B | 0644 |
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virtconvert.h | File | 947 B | 0644 |
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zorro.h | File | 1.17 KB | 0644 |
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