diff options
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/sun3/sun3/locore.s | 636 |
1 files changed, 177 insertions, 459 deletions
diff --git a/sys/arch/sun3/sun3/locore.s b/sys/arch/sun3/sun3/locore.s index 13ae9b105e4..4b30b461a8a 100644 --- a/sys/arch/sun3/sun3/locore.s +++ b/sys/arch/sun3/sun3/locore.s @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.s,v 1.19 2000/06/05 11:03:04 art Exp $ */ +/* $OpenBSD: locore.s,v 1.20 2000/07/14 14:28:11 miod Exp $ */ /* $NetBSD: locore.s,v 1.40 1996/11/06 20:19:54 cgd Exp $ */ /* @@ -45,22 +45,21 @@ */ #include "assym.h" +#include <machine/asm.h> #include <machine/trap.h> -| Remember this is a fun project. (Thanks, Adam. I try! 8^) +| Remember this is a fun project! | This is for kvm_mkdb, and should be the address of the beginning | of the kernel text segment (not necessarily the same as kernbase). .text - .globl _kernel_text -_kernel_text: +GLOBAL(kernel_text) | This is the entry point, as well as the end of the temporary stack | used during process switch (one 8K page ending at start) - .globl tmpstk -tmpstk: - .globl start -start: +ASGLOBAL(tmpstk) +ASGLOBAL(start) + | First we need to set it up so we can access the sun MMU, and be otherwise | undisturbed. Until otherwise noted, all code must be position independent | as the boot loader put us low in memory, but we are linked high. @@ -105,25 +104,29 @@ L_high_code: | just before the start of the kernel text segment, so the | kernel can sanity-check the DDB symbols at [end...esym]. | Pass the struct exec at tmpstk-32 to sun3_bootstrap(). - lea tmpstk-32, sp - jsr _sun3_bootstrap +| Also, make sure the initial frame pointer is zero so that +| the backtrace algorithm used by KGDB terminates nicely. + lea _ASM_LABEL(tmpstk)-32, sp + movl #0, a6 + jsr _C_LABEL(sun3_bootstrap) -| Now that sun3_bootstrap is done using the PROM setcxsegmap +| Now that sun3_bootstrap() is done using the PROM functions, | we can safely set the sfc/dfc to something != FC_CONTROL moveq #FC_USERD, d0 | make movs access "user data" movc d0, sfc | space for copyin/copyout movc d0, dfc | Setup process zero user/kernel stacks. - movl _proc0paddr,a1 | get proc0 pcb addr + movl _C_LABEL(proc0paddr),a1 | get proc0 pcb addr lea a1@(USPACE-4),sp | set SSP to last word movl #USRSTACK-4,a2 movl a2,usp | init user SP -| Note curpcb was already set in sun3_bootstrap. +| Note curpcb was already set in sun3_bootstrap(). | Will do fpu initialization during autoconfig (see fpu.c) | The interrupt vector table and stack are now ready. - movw #PSL_LOWIPL,sr | lower SPL +| Interrupts will be enabled later, AFTER autoconfiguration +| is finished, to avoid spurious interrupts. /* * Final preparation for calling main. @@ -139,17 +142,18 @@ L_high_code: movw #PSL_USER,sp@- | in user mode clrl sp@- | stack adjust count and padding lea sp@(-64),sp | construct space for D0-D7/A0-A7 - lea _proc0,a0 | proc0 in a0 - movl sp,a0@(P_MDREGS) | save frame for proc0 - movl usp,a1 - movl a1,sp@(FR_SP) | save user stack pointer in frame - jbsr _main | main() + movl sp,a1 | a1=trapframe + lea _C_LABEL(proc0),a0 | proc0 in a0 + movl a1,a0@(P_MDREGS) | save frame for proc0 + movl a2,a1@(FR_SP) | a2 == usp (from above) + pea a1@ | push &trapframe + jbsr _C_LABEL(main) | main(&trapframe) + addql #4,sp | help DDB backtrace trap #15 | should not get here | This is used by cpu_fork() to return to user mode. | It is called with SP pointing to a struct trapframe. - .globl _proc_do_uret -_proc_do_uret: +GLOBAL(proc_do_uret) movl sp@(FR_SP),a0 | grab and load movl a0,usp | user SP moveml sp@+,#0x7FFF | load most registers (all but SSP) @@ -171,8 +175,7 @@ _proc_do_uret: * pointer into a register, call it, then pop the arg, and finally * return using the switchframe that remains on the stack. */ - .globl _proc_trampoline -_proc_trampoline: +GLOBAL(proc_trampoline) movl sp@+,a0 | function pointer jbsr a0@ | (*func)(procp) addql #4,sp | toss the arg @@ -184,19 +187,14 @@ _proc_trampoline: /* * Trap/interrupt vector routines */ +#include <m68k/m68k/trap_subr.s> - .globl _buserr, _addrerr, _illinst, _zerodiv, _chkinst - .globl _trapvinst, _privinst, _trace, _badtrap, _fmterr - .globl _trap0, _trap1, _trap2, _trap12, _trap15 - .globl _coperr, _fpfline, _fpunsupp - - .globl _trap, _nofault, _longjmp -_buserr: - tstl _nofault | device probe? - jeq _addrerr | no, handle as usual - movl _nofault,sp@- | yes, - jbsr _longjmp | longjmp(nofault) -_addrerr: +GLOBAL(buserr) + tstl _C_LABEL(nofault) | device probe? + jeq _C_LABEL(addrerr) | no, handle as usual + movl _C_LABEL(nofault),sp@- | yes, + jbsr _C_LABEL(longjmp) | longjmp(nofault) +GLOBAL(addrerr) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save user registers movl usp,a0 | save the user SP @@ -268,48 +266,28 @@ sun3_mmu_specific: Lismerr: movl #T_MMUFLT,sp@- | show that we are an MMU fault - jra Ltrapnstkadj | and deal with it + jra _ASM_LABEL(faultstkadj) | and deal with it Lisaerr: movl #T_ADDRERR,sp@- | mark address error - jra Ltrapnstkadj | and deal with it + jra _ASM_LABEL(faultstkadj) | and deal with it Lisberr: movl #T_BUSERR,sp@- | mark bus error -Ltrapnstkadj: - jbsr _trap | handle the error - lea sp@(12),sp | pop value args - movl sp@(FR_SP),a0 | restore user SP - movl a0,usp | from save area - movw sp@(FR_ADJ),d0 | need to adjust stack? - jne Lstkadj | yes, go to it - moveml sp@+,#0x7FFF | no, restore most user regs - addql #8,sp | toss SSP and stkadj - jra rei | all done -Lstkadj: - lea sp@(FR_HW),a1 | pointer to HW frame - addql #8,a1 | source pointer - movl a1,a0 | source - addw d0,a0 | + hole size = dest pointer - movl a1@-,a0@- | copy - movl a1@-,a0@- | 8 bytes - movl a0,sp@(FR_SP) | new SSP - moveml sp@+,#0x7FFF | restore user registers - movl sp@,sp | and our SP - jra rei | all done + jra _ASM_LABEL(faultstkadj) | and deal with it /* * FP exceptions. */ -_fpfline: +GLOBAL(fpfline) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save registers moveq #T_FPEMULI,d0 | denote as FP emulation trap - jra fault | do it + jra _ASM_LABEL(fault) | do it -_fpunsupp: +GLOBAL(fpunsupp) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save registers moveq #T_FPEMULD,d0 | denote as FP emulation trap - jra fault | do it + jra _ASM_LABEL(fault) | do it /* * Handles all other FP coprocessor exceptions. @@ -317,14 +295,13 @@ _fpunsupp: * and may cause signal delivery, we need to test for stack adjustment * after the trap call. */ - .globl _fpfault -_fpfault: +GLOBAL(fpfault) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save user registers movl usp,a0 | and save movl a0,sp@(FR_SP) | the user stack pointer clrl sp@- | no VA arg - movl _curpcb,a0 | current pcb + movl _C_LABEL(curpcb),a0 | current pcb lea a0@(PCB_FPCTX),a0 | address of FP savearea fsave a0@ | save state tstb a0@ | null state frame? @@ -336,201 +313,71 @@ Lfptnull: fmovem fpsr,sp@- | push fpsr as code argument frestore a0@ | restore state movl #T_FPERR,sp@- | push type arg - jra Ltrapnstkadj | call trap and deal with stack cleanup - -/* - * Coprocessor and format errors can generate mid-instruction stack - * frames and cause signal delivery hence we need to check for potential - * stack adjustment. - */ -_coperr: - clrl sp@- | stack adjust count - moveml #0xFFFF,sp@- - movl usp,a0 | get and save - movl a0,sp@(FR_SP) | the user stack pointer - clrl sp@- | no VA arg - clrl sp@- | or code arg - movl #T_COPERR,sp@- | push trap type - jra Ltrapnstkadj | call trap and deal with stack adjustments - -_fmterr: - clrl sp@- | stack adjust count - moveml #0xFFFF,sp@- - movl usp,a0 | get and save - movl a0,sp@(FR_SP) | the user stack pointer - clrl sp@- | no VA arg - clrl sp@- | or code arg - movl #T_FMTERR,sp@- | push trap type - jra Ltrapnstkadj | call trap and deal with stack adjustments + jra _ASM_LABEL(faultstkadj) | call trap and deal with stack cleanup + .globl _straytrap /* * Other exceptions only cause four and six word stack frame and require * no post-trap stack adjustment. */ -_illinst: - clrl sp@- - moveml #0xFFFF,sp@- - moveq #T_ILLINST,d0 - jra fault - -_zerodiv: - clrl sp@- - moveml #0xFFFF,sp@- - moveq #T_ZERODIV,d0 - jra fault - -_chkinst: - clrl sp@- - moveml #0xFFFF,sp@- - moveq #T_CHKINST,d0 - jra fault - -_trapvinst: - clrl sp@- - moveml #0xFFFF,sp@- - moveq #T_TRAPVINST,d0 - jra fault - -_privinst: - clrl sp@- - moveml #0xFFFF,sp@- - moveq #T_PRIVINST,d0 - jra fault - - .globl fault -fault: - movl usp,a0 | get and save - movl a0,sp@(FR_SP) | the user stack pointer - clrl sp@- | no VA arg - clrl sp@- | or code arg - movl d0,sp@- | push trap type - jbsr _trap | handle trap - lea sp@(12),sp | pop value args - movl sp@(FR_SP),a0 | restore - movl a0,usp | user SP - moveml sp@+,#0x7FFF | restore most user regs - addql #8,sp | pop SP and stack adjust - jra rei | all done - - .globl _straytrap -_badtrap: +GLOBAL(badtrap) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save std frame regs - jbsr _straytrap | report + jbsr _C_LABEL(straytrap) | report moveml sp@+,#0xFFFF | restore regs addql #4, sp | stack adjust count - jra rei | all done + jra _ASM_LABEL(rei) | all done /* * Trap 0 is for system calls */ .globl _syscall -_trap0: +GLOBAL(trap0) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- | save user registers movl usp,a0 | save the user SP movl a0,sp@(FR_SP) | in the savearea movl d0,sp@- | push syscall number - jbsr _syscall | handle it + jbsr _C_LABEL(syscall) | handle it addql #4,sp | pop syscall arg movl sp@(FR_SP),a0 | grab and restore movl a0,usp | user SP moveml sp@+,#0x7FFF | restore most registers addql #8,sp | pop SP and stack adjust - jra rei | all done - -/* - * Trap 1 is either: - * sigreturn (native OpenBSD executable) - * breakpoint (HPUX executable) - */ -_trap1: -#if 0 /* COMPAT_HPUX */ - /* If process is HPUX, this is a user breakpoint. */ - jne trap15 | breakpoint -#endif - /* fall into sigreturn */ - -/* - * The sigreturn() syscall comes here. It requires special handling - * because we must open a hole in the stack to fill in the (possibly much - * larger) original stack frame. - */ -sigreturn: - lea sp@(-84),sp | leave enough space for largest frame - movl sp@(84),sp@ | move up current 8 byte frame - movl sp@(88),sp@(4) - movl #84,sp@- | default: adjust by 84 bytes - moveml #0xFFFF,sp@- | save user registers - movl usp,a0 | save the user SP - movl a0,sp@(FR_SP) | in the savearea - movl #SYS_sigreturn,sp@- | push syscall number - jbsr _syscall | handle it - addql #4,sp | pop syscall# - movl sp@(FR_SP),a0 | grab and restore - movl a0,usp | user SP - lea sp@(FR_HW),a1 | pointer to HW frame - movw sp@(FR_ADJ),d0 | do we need to adjust the stack? - jeq Lsigr1 | no, just continue - moveq #92,d1 | total size - subw d0,d1 | - hole size = frame size - lea a1@(92),a0 | destination - addw d1,a1 | source - lsrw #1,d1 | convert to word count - subqw #1,d1 | minus 1 for dbf -Lsigrlp: - movw a1@-,a0@- | copy a word - dbf d1,Lsigrlp | continue - movl a0,a1 | new HW frame base -Lsigr1: - movl a1,sp@(FR_SP) | new SP value - moveml sp@+,#0x7FFF | restore user registers - movl sp@,sp | and our SP - jra rei | all done - -/* - * Trap 2 is one of: - * OpenBSD: not used (ignore) - * SunOS: Some obscure FPU operation - * HPUX: sigreturn - */ -_trap2: -#if 0 /* COMPAT_HPUX */ - /* XXX: If HPUX, this is a user breakpoint. */ - jne sigreturn -#endif - /* fall into trace (OpenBSD or SunOS) */ + jra _ASM_LABEL(rei) | all done +/* Use common m68k sigreturn */ +#include <m68k/m68k/sigreturn.s> + /* * Trace (single-step) trap. Kernel-mode is special. * User mode traps are simply passed on to trap(). */ -_trace: +GLOBAL(trace) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- moveq #T_TRACE,d0 - movw sp@(FR_HW),d1 | get PSW - andw #PSL_S,d1 | from system mode? - jne kbrkpt | yes, kernel breakpoint - jra fault | no, user-mode fault + btst #5,sp@(FR_HW) | was system mode? + jne _ASM_LABEL(kbrkpt) | yes, kernel breakpoint + jra _ASM_LABEL(fault) | no, user-mode fault /* * Trap 15 is used for: * - GDB breakpoints (in user programs) * - KGDB breakpoints (in the kernel) * - trace traps for SUN binaries (not fully supported yet) - * User mode traps are passed simply passed to trap() + * User mode traps are simply passed to trap() */ -_trap15: +GLOBAL(trap15) clrl sp@- | stack adjust count moveml #0xFFFF,sp@- moveq #T_TRAP15,d0 - movw sp@(FR_HW),d1 | get PSW - andw #PSL_S,d1 | from system mode? - jne kbrkpt | yes, kernel breakpoint - jra fault | no, user-mode fault + btst #5,sp@(FR_HW) | was system mode? + jne _ASM_LABEL(kbrkpt) | yes, kernel breakpoint + jra _ASM_LABEL(fault) | no, user-mode fault -kbrkpt: | Kernel-mode breakpoint or trace trap. (d0=trap_type) +ASLOCAL(kbrkpt) + | Kernel-mode breakpoint or trace trap. (d0=trap_type) | Save the system sp rather than the user sp. movw #PSL_HIGHIPL,sr | lock out interrupts lea sp@(FR_SIZE),a6 | Save stack pointer @@ -539,11 +386,11 @@ kbrkpt: | Kernel-mode breakpoint or trace trap. (d0=trap_type) | If we are not on tmpstk switch to it. | (so debugger can change the stack pointer) movl a6,d1 - cmpl #tmpstk,d1 + cmpl #_ASM_LABEL(tmpstk),d1 jls Lbrkpt2 | already on tmpstk | Copy frame to the temporary stack movl sp,a0 | a0=src - lea tmpstk-96,a1 | a1=dst + lea _ASM_LABEL(tmpstk)-96,a1 | a1=dst movl a1,sp | sp=new frame moveq #FR_SIZE,d1 Lbrkpt1: @@ -553,7 +400,7 @@ Lbrkpt1: Lbrkpt2: | Call the trap handler for the kernel debugger. - | Do not call trap() to do it, so that we can + | Do not call trap() to handle it, so that we can | set breakpoints in trap() if we want. We know | the trap type is either T_TRACE or T_BREAKPOINT. | If we have both DDB and KGDB, let KGDB see it first, @@ -565,7 +412,7 @@ Lbrkpt2: | Let KGDB handle it (if connected) movl a2,sp@- | push frame ptr movl d2,sp@- | push trap type - jbsr _kgdb_trap | handle the trap + jbsr _C_LABEL(kgdb_trap) | handle the trap addql #8,sp | pop args cmpl #0,d0 | did kgdb handle it jne Lbrkpt3 | yes, done @@ -574,7 +421,7 @@ Lbrkpt2: | Let DDB handle it. movl a2,sp@- | push frame ptr movl d2,sp@- | push trap type - jbsr _kdb_trap | handle the trap + jbsr _C_LABEL(kdb_trap) | handle the trap addql #8,sp | pop args cmpl #0,d0 | did ddb handle it jne Lbrkpt3 | yes, done @@ -582,14 +429,13 @@ Lbrkpt2: | Drop into the PROM temporarily... movl a2,sp@- | push frame ptr movl d2,sp@- | push trap type - jbsr _nodb_trap | handle the trap + jbsr _C_LABEL(nodb_trap) | handle the trap addql #8,sp | pop args Lbrkpt3: | The stack pointer may have been modified, or | data below it modified (by kgdb push call), | so push the hardware frame at the current sp | before restoring registers and returning. - movl sp@(FR_SP),a0 | modified sp lea sp@(FR_SIZE),a1 | end of our frame movl a1@-,a0@- | copy 2 longs with @@ -604,14 +450,31 @@ Lbrkpt3: * cachectl(command, addr, length) * command in d0, addr in a1, length in d1 */ - .globl _cachectl -_trap12: +GLOBAL(trap12) movl d1,sp@- | push length movl a1,sp@- | push addr movl d0,sp@- | push command - jbsr _cachectl | do it + jbsr _C_LABEL(cachectl) | do it lea sp@(12),sp | pop args - jra rei | all done + jra _ASM_LABEL(rei) | all done + +/* + * Trap 1 is sigreturn + */ +ENTRY_NOPROFILE(trap1) + jra _ASM_LABEL(sigreturn) + +/* + * Trap 2 - trace trap + * + * XXX SunOS uses this for a cache flush! What do we do here? + * XXX + * XXX movl #IC_CLEAR,d0 + * XXX movc d0,cacr + * XXX rte + */ +ENTRY_NOPROFILE(trap2) + jra _C_LABEL(trace) /* * Interrupt handlers. Most are auto-vectored, @@ -626,26 +489,24 @@ _trap12: #define INTERRUPT_RESTORE \ moveml sp@+,#0x0303 -.align 4 /* * This is the common auto-vector interrupt handler, * for which the CPU provides the vector=0x18+level. * These are installed in the interrupt vector table. */ - .globl __isr_autovec -__isr_autovec: + .align 2 +GLOBAL(_isr_autovec) INTERRUPT_SAVEREG movw sp@(22),sp@- | push exception vector info clrw sp@- - jbsr _isr_autovec | C dispatcher + jbsr _C_LABEL(isr_autovec) | C dispatcher addql #4,sp INTERRUPT_RESTORE - jra rei /* XXX - Just do rte here? */ + jra _ASM_LABEL(rei) /* clock: see clock.c */ -.globl __isr_clock, _interrupt_reg, _clock_intr, _clock_va -.align 4 -__isr_clock: + .align 2 +GLOBAL(_isr_clock) INTERRUPT_SAVEREG | save a0, a1, d0, d1 movl _clock_va, a0 movl _interrupt_reg, a1 @@ -656,30 +517,27 @@ __isr_clock: | used to have "timebomb" check here... lea sp@(16),a1 | a1 = &clockframe movl a1,sp@- - jbsr _clock_intr + jbsr _C_LABEL(clock_intr) addql #4,sp INTERRUPT_RESTORE - jra rei + jra _ASM_LABEL(rei) | Handler for all vectored interrupts (i.e. VME interrupts) .align 2 - .globl __isr_vectored, _isr_vectored -__isr_vectored: +GLOBAL(_isr_vectored) INTERRUPT_SAVEREG movw sp@(22),sp@- | push exception vector info clrw sp@- - jbsr _isr_vectored | C dispatcher + jbsr _C_LABEL(isr_vectored) | C dispatcher addql #4,sp | INTERRUPT_RESTORE - jra rei | all done - + jra _ASM_LABEL(rei) | all done #undef INTERRUPT_SAVEREG #undef INTERRUPT_RESTORE /* interrupt counters (needed by vmstat) */ - .globl _intrcnt,_eintrcnt,_intrnames,_eintrnames -_intrnames: +GLOBAL(intrnames) .asciz "spur" | 0 .asciz "lev1" | 1 .asciz "lev2" | 2 @@ -688,13 +546,13 @@ _intrnames: .asciz "clock" | 5 .asciz "lev6" | 6 .asciz "nmi" | 7 -_eintrnames: +GLOBAL(eintrnames) .data .even -_intrcnt: +GLOBAL(intrcnt) .long 0,0,0,0,0,0,0,0,0,0 -_eintrcnt: +GLOBAL(eintrcnt) .text /* @@ -715,14 +573,12 @@ _eintrcnt: * necessitating a stack cleanup. */ - .globl _astpending - .globl rei -rei: +ASGLOBAL(rei) #ifdef DIAGNOSTIC - tstl _panicstr | have we paniced? + tstl _C_LABEL(panicstr) | have we paniced? jne Ldorte | yes, do not make matters worse #endif - tstl _astpending | AST pending? + tstl _C_LABEL(astpending) | AST pending? jeq Ldorte | no, done Lrei1: btst #5,sp@ | yes, are we returning to user mode? @@ -735,7 +591,7 @@ Lrei1: clrl sp@- | VA == none clrl sp@- | code == none movl #T_ASTFLT,sp@- | type == async system trap - jbsr _trap | go handle it + jbsr _C_LABEL(trap) | go handle it lea sp@(12),sp | pop value args movl sp@(FR_SP),a0 | restore user SP movl a0,usp | from save area @@ -766,162 +622,38 @@ Ldorte: */ /* - * Signal "trampoline" code (18 bytes). Invoked from RTE setup by sendsig(). - * - * Stack looks like: - * - * sp+0 -> signal number - * sp+4 pointer to siginfo (sip) - * sp+8 pointer to signal context frame (scp) - * sp+12 address of handler - * sp+16 saved hardware state - * . - * . - * scp+0-> beginning of signal context frame + * Use common m68k sigcode. */ - .globl _sigcode, _esigcode - .data - .align 2 -_sigcode: /* Found at address: 0x0DFFffdc */ - movl sp@(12),a0 | signal handler addr (4 bytes) - jsr a0@ | call signal handler (2 bytes) - addql #4,sp | pop signo (2 bytes) - trap #1 | special syscall entry (2 bytes) - movl d0,sp@(4) | save errno (4 bytes) - moveq #1,d0 | syscall == exit (2 bytes) - trap #0 | exit(errno) (2 bytes) - .align 2 -_esigcode: - .text +#include <m68k/m68k/sigcode.s> -/* XXX - hp300 still has icode here... */ + .text /* * Primitives */ -#include <machine/asm.h> /* - * non-local gotos + * Use common m68k support routines. */ -ENTRY(setjmp) - movl sp@(4),a0 | savearea pointer - moveml #0xFCFC,a0@ | save d2-d7/a2-a7 - movl sp@,a0@(48) | and return address - moveq #0,d0 | return 0 - rts +#include <m68k/m68k/support.s> -ENTRY(longjmp) - movl sp@(4),a0 - moveml a0@+,#0xFCFC - movl a0@,sp@ - moveq #1,d0 - rts +BSS(want_resched,4) /* - * The following primitives manipulate the run queues. - * _whichqs tells which of the 32 queues _qs have processes in them. - * Setrunqueue puts processes into queues, Remrunqueue removes them - * from queues. The running process is on no queue, other processes - * are on a queue related to p->p_priority, divided by 4 actually to - * shrink the 0-127 range of priorities into the 32 available queues. + * Use common m68k process manipulation routines. */ - - .globl _whichqs,_qs,_cnt,_panic - .globl _curproc - .comm _want_resched,4 - -/* - * setrunqueue(p) - * - * Call should be made at splclock(), and p->p_stat should be SRUN - */ -ENTRY(setrunqueue) - movl sp@(4),a0 -#ifdef DIAGNOSTIC - tstl a0@(P_BACK) - jne Lset1 - tstl a0@(P_WCHAN) - jne Lset1 - cmpb #SRUN,a0@(P_STAT) - jne Lset1 -#endif - clrl d0 - movb a0@(P_PRIORITY),d0 - lsrb #2,d0 - movl _whichqs,d1 - bset d0,d1 - movl d1,_whichqs - lslb #3,d0 - addl #_qs,d0 - movl d0,a0@(P_FORW) - movl d0,a1 - movl a1@(P_BACK),a0@(P_BACK) - movl a0,a1@(P_BACK) - movl a0@(P_BACK),a1 - movl a0,a1@(P_FORW) - rts -#ifdef DIAGNOSTIC -Lset1: - movl #Lset2,sp@- - jbsr _panic -Lset2: - .asciz "setrunqueue" - .even -#endif - -/* - * remrunqueue(p) - * - * Call should be made at splclock(). - */ -ENTRY(remrunqueue) - movl sp@(4),a0 | proc *p - clrl d0 - movb a0@(P_PRIORITY),d0 - lsrb #2,d0 - movl _whichqs,d1 - bclr d0,d1 | if ((d1 & (1 << d0)) == 0) - jeq Lrem2 | panic (empty queue) - movl d1,_whichqs - movl a0@(P_FORW),a1 - movl a0@(P_BACK),a1@(P_BACK) - movl a0@(P_BACK),a1 - movl a0@(P_FORW),a1@(P_FORW) - movl #_qs,a1 - movl d0,d1 - lslb #3,d1 - addl d1,a1 - cmpl a1@(P_FORW),a1 - jeq Lrem1 - movl _whichqs,d1 - bset d0,d1 - movl d1,_whichqs -Lrem1: - clrl a0@(P_BACK) - rts -Lrem2: - movl #Lrem3,sp@- - jbsr _panic -Lrem3: - .asciz "remrunqueue" - .even +#include <m68k/m68k/proc_subr.s> | Message for Lbadsw panic Lsw0: .asciz "cpu_switch" .even - .globl _curpcb - .globl _masterpaddr | XXX compatibility (debuggers) .data -_masterpaddr: | XXX compatibility (debuggers) -_curpcb: +GLOBAL(masterpaddr) | XXX compatibility (debuggers) +GLOBAL(curpcb) .long 0 -mdpflag: - .byte 0 | copy of proc md_flags low byte - .align 2 - .comm nullpcb,SIZEOF_PCB +ASBSS(nullpcb,SIZEOF_PCB) .text /* @@ -931,8 +663,9 @@ mdpflag: */ ENTRY(switch_exit) movl sp@(4),a0 | struct proc *p - movl #nullpcb,_curpcb | save state into garbage pcb - lea tmpstk,sp | goto a tmp stack + | save state into garbage pcb + movl #_ASM_LABEL(nullpcb),_C_LABEL(curpcb) + lea _ASM_LABEL(tmpstk),sp | goto a tmp stack movl a0,sp@- | pass proc ptr down /* Schedule the vmspace and stack to be freed. */ @@ -940,32 +673,30 @@ ENTRY(switch_exit) jbsr _C_LABEL(exit2) lea sp@(4),sp | pop args - jra _cpu_switch + jra _C_LABEL(cpu_switch) /* * When no processes are on the runq, cpu_switch() branches to idle * to wait for something to come ready. */ .data - .globl _Idle_count -_Idle_count: +GLOBAL(Idle_count) .long 0 .text - .globl Idle Lidle: stop #PSL_LOWIPL -Idle: +GLOBAL(_Idle) movw #PSL_HIGHIPL,sr - addql #1, _Idle_count - tstl _whichqs + addql #1, _C_LABEL(Idle_count) + tstl _C_LABEL(whichqs) jeq Lidle movw #PSL_LOWIPL,sr jra Lsw1 Lbadsw: movl #Lsw0,sp@- - jbsr _panic + jbsr _C_LABEL(panic) /*NOTREACHED*/ /* @@ -975,12 +706,12 @@ Lbadsw: * XXX - Sould we use p->p_addr instead of curpcb? -gwr */ ENTRY(cpu_switch) - movl _curpcb,a1 | current pcb + movl _C_LABEL(curpcb),a1 | current pcb movw sr,a1@(PCB_PS) | save sr before changing ipl #ifdef notyet - movl _curproc,sp@- | remember last proc running + movl _C_LABEL(curproc),sp@- | remember last proc running #endif - clrl _curproc + clrl _C_LABEL(curproc) Lsw1: /* @@ -988,7 +719,7 @@ Lsw1: * then take the first proc from that queue. */ clrl d0 - lea _whichqs,a0 + lea _C_LABEL(whichqs),a0 movl a0@,d1 Lswchk: btst d0,d1 @@ -996,7 +727,7 @@ Lswchk: addqb #1,d0 cmpb #32,d0 jne Lswchk - jra Idle + jra _C_LABEL(_Idle) Lswfnd: movw #PSL_HIGHIPL,sr | lock out interrupts movl a0@,d1 | and check again... @@ -1025,12 +756,12 @@ Lswok: movl a0@(P_BACK),a1@(P_BACK) | q->p_back = p->p_back cmpl a0@(P_FORW),d1 | anyone left on queue? jeq Lsw2 | no, skip - movl _whichqs,d1 + movl _C_LABEL(whichqs),d1 bset d0,d1 | yes, reset bit - movl d1,_whichqs + movl d1,_C_LABEL(whichqs) Lsw2: - movl a0,_curproc - clrl _want_resched + movl a0,_C_LABEL(curproc) + clrl _C_LABEL(want_resched) #ifdef notyet movl sp@+,a1 | XXX - Make this work! cmpl a0,a1 | switching to same proc? @@ -1039,12 +770,12 @@ Lsw2: /* * Save state of previous process in its pcb. */ - movl _curpcb,a1 + movl _C_LABEL(curpcb),a1 moveml #0xFCFC,a1@(PCB_REGS) | save non-scratch registers movl usp,a2 | grab USP (a2 has been saved) movl a2,a1@(PCB_USP) | and save it - tstl _fputype | Do we have an fpu? + tstl _C_LABEL(fputype) | Do we have an fpu? jeq Lswnofpsave | No? Then don't try save. lea a1@(PCB_FPCTX),a2 | pointer to FP save area fsave a2@ | save FP state @@ -1069,23 +800,25 @@ Lswnofpsave: #endif clrl a0@(P_BACK) | clear back link movl a0@(P_ADDR),a1 | get p_addr - movl a1,_curpcb + movl a1,_C_LABEL(curpcb) - /* see if pmap_activate needs to be called; should remove this */ - movl a0@(P_VMSPACE),a2 | a2 = p->p_vmspace + /* + * Load the new VM context (new MMU root pointer) + */ + movl a0@(P_VMSPACE),a2 | vm = p->p_vmspace #ifdef DIAGNOSTIC - tstl a2 | map == VM_MAP_NULL? + tstl a2 | vm == VM_MAP_NULL? jeq Lbadsw | panic #endif -| Important note: We MUST call pmap_activate to set the -| MMU context register (like setting a root table pointer). -| XXX - Eventually, want to do that here, inline. - lea a2@(VM_PMAP),a2 | pmap = &vmspace.vm_pmap + /* + * Call pmap_activate() to set the MMU context register + */ + lea a2@(VM_PMAP),a2 | pmap = &vm.vm_pmap pea a2@ | push pmap - jbsr _pmap_activate | pmap_activate(pmap) + jbsr _C_LABEL(pmap_activate) | pmap_activate(pmap) addql #4,sp - movl _curpcb,a1 | restore p_addr + movl _C_LABEL(curpcb),a1 | restore p_addr | Note: pmap_activate will clear the cache if needed. /* @@ -1096,7 +829,7 @@ Lswnofpsave: movl a1@(PCB_USP),a0 movl a0,usp | and USP - tstl _fputype | If we don't have an fpu, + tstl _C_LABEL(fputype) | If we don't have an fpu, jeq Lres_skip | don't try to restore it. lea a1@(PCB_FPCTX),a0 | pointer to FP save area tstb a0@ | null state frame? @@ -1126,7 +859,7 @@ ENTRY(savectx) movl a0,a1@(PCB_USP) | and save it moveml #0xFCFC,a1@(PCB_REGS) | save non-scratch registers - tstl _fputype | Do we have FPU? + tstl _C_LABEL(fputype) | Do we have FPU? jeq Lsavedone | No? Then don't save state. lea a1@(PCB_FPCTX),a0 | pointer to FP save area fsave a0@ | save FP state @@ -1168,8 +901,7 @@ ENTRY(DCIU) * * [I don't think the ENTRY() macro will do the right thing with this -- glass] */ - .globl _getsp -_getsp: +GLOBAL(getsp) movl sp,d0 | get current SP addql #4,d0 | compensate for return address rts @@ -1191,7 +923,7 @@ ENTRY(setvbr) movc d0, vbr rts -/* loadustp */ +/* loadustp, ptest_addr */ /* * Set processor priority level calls. Most are implemented with @@ -1200,40 +932,28 @@ ENTRY(setvbr) * Most places will use the inlined function param.h supplies. */ -ENTRY(_spl) - movl sp@(4),d1 +ENTRY(_getsr) clrl d0 - movw sr,d0 - movw d1,sr - rts - -ENTRY(getsr) - moveq #0, d0 movw sr, d0 rts -ENTRY(_insque) +ENTRY(_spl) + clrl d0 movw sr,d0 - movw #PSL_HIGHIPL,sr | atomic - movl sp@(8),a0 | where to insert (after) - movl sp@(4),a1 | element to insert (e) - movl a0@,a1@ | e->next = after->next - movl a0,a1@(4) | e->prev = after - movl a1,a0@ | after->next = e - movl a1@,a0 - movl a1,a0@(4) | e->next->prev = e - movw d0,sr + movl sp@(4),d1 + movw d1,sr rts - -ENTRY(_remque) + +ENTRY(_splraise) + clrl d0 movw sr,d0 - movw #PSL_HIGHIPL,sr | atomic - movl sp@(4),a0 | element to remove (e) - movl a0@,a1 - movl a0@(4),a0 - movl a0,a1@(4) | e->next->prev = e->prev - movl a1,a0@ | e->prev->next = e->next - movw d0,sr + movl d0,d1 + andl #PSL_HIGHIPL,d1 | old &= PSL_HIGHIPL + cmpl sp@(4),d1 | (old - new) + bge Lsplr + movl sp@(4),d1 + movw d1,sr +Lsplr: rts /* @@ -1267,12 +987,11 @@ Lm68881rdone: * XXX: Currently this is set in sun3_startup.c based on the * XXX: CPU model but this should be determined at run time... */ - .globl __delay -__delay: +GLOBAL(_delay) | d0 = arg = (usecs << 8) movl sp@(4),d0 | d1 = delay_divisor; - movl _delay_divisor,d1 + movl _C_LABEL(delay_divisor),d1 L_delay: subl d1,d0 jgt L_delay @@ -1280,13 +999,12 @@ L_delay: | Define some addresses, mostly so DDB can print useful info. - .globl _kernbase +| Not using C_LABEL() here because these symbols are never +| referenced by any C code, and if the leading underscore +| ever goes away, these lines turn into syntax errors... .set _kernbase,KERNBASE - .globl _dvma_base .set _dvma_base,DVMA_SPACE_START - .globl _prom_start .set _prom_start,MONSTART - .globl _prom_base .set _prom_base,PROM_BASE |The end! |