2 * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
19 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * Copyright (C) 2001 Benno Rice
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
32 * 1. Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * 2. Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
38 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
41 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
44 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
45 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
46 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
47 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
51 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
52 * Copyright (C) 1995, 1996 TooLs GmbH.
53 * All rights reserved.
55 * Redistribution and use in source and binary forms, with or without
56 * modification, are permitted provided that the following conditions
58 * 1. Redistributions of source code must retain the above copyright
59 * notice, this list of conditions and the following disclaimer.
60 * 2. Redistributions in binary form must reproduce the above copyright
61 * notice, this list of conditions and the following disclaimer in the
62 * documentation and/or other materials provided with the distribution.
63 * 3. All advertising materials mentioning features or use of this software
64 * must display the following acknowledgement:
65 * This product includes software developed by TooLs GmbH.
66 * 4. The name of TooLs GmbH may not be used to endorse or promote products
67 * derived from this software without specific prior written permission.
69 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
70 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
71 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
72 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
73 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
74 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
75 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
76 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
77 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
78 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
81 #include <sys/cdefs.h>
82 __FBSDID("$FreeBSD$");
84 #include "opt_compat.h"
86 #include "opt_kstack_pages.h"
87 #include "opt_msgbuf.h"
89 #include <sys/cdefs.h>
90 #include <sys/types.h>
91 #include <sys/param.h>
93 #include <sys/systm.h>
101 #include <sys/kernel.h>
102 #include <sys/lock.h>
103 #include <sys/mutex.h>
104 #include <sys/sysctl.h>
105 #include <sys/exec.h>
107 #include <sys/sysproto.h>
108 #include <sys/signalvar.h>
109 #include <sys/sysent.h>
110 #include <sys/imgact.h>
111 #include <sys/msgbuf.h>
112 #include <sys/ptrace.h>
116 #include <vm/vm_page.h>
117 #include <vm/vm_object.h>
118 #include <vm/vm_pager.h>
120 #include <machine/cpu.h>
121 #include <machine/kdb.h>
122 #include <machine/reg.h>
123 #include <machine/vmparam.h>
124 #include <machine/spr.h>
125 #include <machine/hid.h>
126 #include <machine/psl.h>
127 #include <machine/trap.h>
128 #include <machine/md_var.h>
129 #include <machine/mmuvar.h>
130 #include <machine/sigframe.h>
131 #include <machine/metadata.h>
132 #include <machine/bootinfo.h>
133 #include <machine/platform.h>
135 #include <sys/linker.h>
136 #include <sys/reboot.h>
138 #include <powerpc/mpc85xx/ocpbus.h>
139 #include <powerpc/mpc85xx/mpc85xx.h>
142 extern vm_offset_t ksym_start, ksym_end;
146 #define debugf(fmt, args...) printf(fmt, ##args)
148 #define debugf(fmt, args...)
151 extern unsigned char kernel_text[];
152 extern unsigned char _etext[];
153 extern unsigned char _edata[];
154 extern unsigned char __bss_start[];
155 extern unsigned char __sbss_start[];
156 extern unsigned char __sbss_end[];
157 extern unsigned char _end[];
159 extern void dcache_enable(void);
160 extern void dcache_inval(void);
161 extern void icache_enable(void);
162 extern void icache_inval(void);
164 struct kva_md_info kmi;
165 struct pcpu __pcpu[MAXCPU];
166 struct trapframe frame0;
171 struct bootinfo *bootinfo;
173 char machine[] = "powerpc";
174 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
176 int cacheline_size = 32;
178 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
179 CTLFLAG_RD, &cacheline_size, 0, "");
181 int hw_direct_map = 0;
184 static void cpu_e500_startup(void *);
185 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL);
187 void print_kernel_section_addr(void);
188 void print_bootinfo(void);
189 void print_kenv(void);
190 u_int e500_init(u_int32_t, u_int32_t, void *);
193 cpu_e500_startup(void *dummy)
197 /* Initialise the decrementer-based clock. */
200 /* Good {morning,afternoon,evening,night}. */
201 cpu_setup(PCPU_GET(cpuid));
203 printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
204 ptoa(physmem) / 1048576);
207 /* Display any holes after the first chunk of extended memory. */
209 printf("Physical memory chunk(s):\n");
210 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
211 size = phys_avail[indx + 1] - phys_avail[indx];
213 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
214 phys_avail[indx], phys_avail[indx + 1] - 1,
215 size, size / PAGE_SIZE);
219 vm_ksubmap_init(&kmi);
221 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
222 ptoa(cnt.v_free_count) / 1048576);
224 /* Set up buffers, so they can be used to read disk labels. */
226 vm_pager_bufferinit();
249 debugf("loader passed (static) kenv:\n");
250 if (kern_envp == NULL) {
251 debugf(" no env, null ptr\n");
254 debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp);
257 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp))
258 debugf(" %x %s\n", (u_int32_t)cp, cp);
264 struct bi_mem_region *mr;
265 struct bi_eth_addr *eth;
268 debugf("bootinfo:\n");
269 if (bootinfo == NULL) {
270 debugf(" no bootinfo, null ptr\n");
274 debugf(" version = 0x%08x\n", bootinfo->bi_version);
275 debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base);
276 debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk);
277 debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk);
279 debugf(" mem regions:\n");
280 mr = (struct bi_mem_region *)bootinfo->bi_data;
281 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++)
282 debugf(" #%d, base = 0x%08x, size = 0x%08x\n", i,
283 mr->mem_base, mr->mem_size);
285 debugf(" eth addresses:\n");
286 eth = (struct bi_eth_addr *)mr;
287 for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) {
288 debugf(" #%d, addr = ", i);
289 for (j = 0; j < 6; j++)
290 debugf("%02x ", eth->mac_addr[j]);
296 print_kernel_section_addr(void)
299 debugf("kernel image addresses:\n");
300 debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text);
301 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
302 debugf(" _edata = 0x%08x\n", (uint32_t)_edata);
303 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start);
304 debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end);
305 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start);
306 debugf(" _end = 0x%08x\n", (uint32_t)_end);
309 struct bi_mem_region *
313 return ((struct bi_mem_region *)bootinfo->bi_data);
319 struct bi_mem_region *mr;
320 struct bi_eth_addr *eth;
323 /* Advance to the eth section */
325 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++)
328 eth = (struct bi_eth_addr *)mr;
333 e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp)
345 * Parse metadata and fetch parameters. This must be done as the first
346 * step as we need bootinfo data to at least init the console
349 preload_metadata = mdp;
350 kmdp = preload_search_by_type("elf kernel");
352 bootinfo = (struct bootinfo *)preload_search_info(kmdp,
353 MODINFO_METADATA | MODINFOMD_BOOTINFO);
355 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
356 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
357 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
359 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
360 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
365 * We should scream but how? - without CCSR bar (in bootinfo)
366 * cannot even output anything...
370 * FIXME add return value and handle in the locore so we can
371 * return to the loader maybe? (this seems not very easy to
372 * restore everything as the TLB have all been reprogrammed
373 * in the locore etc...)
378 /* Initialize TLB1 handling */
379 tlb1_init(bootinfo->bi_bar_base);
381 /* Reset Time Base */
384 /* Init params/tunables that can be overridden by the loader. */
387 /* Start initializing proc0 and thread0. */
388 proc_linkup(&proc0, &thread0);
389 thread0.td_frame = &frame0;
391 /* Set up per-cpu data and store the pointer in SPR general 0. */
393 pcpu_init(pc, 0, sizeof(struct pcpu));
394 pc->pc_curthread = &thread0;
395 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
397 /* Initialize system mutexes. */
400 /* Initialize the console before printing anything. */
403 /* Print out some debug info... */
404 debugf("e500_init: console initialized\n");
405 debugf(" arg1 startkernel = 0x%08x\n", startkernel);
406 debugf(" arg2 endkernel = 0x%08x\n", endkernel);
407 debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp);
408 debugf(" end = 0x%08x\n", (u_int32_t)end);
409 debugf(" boothowto = 0x%08x\n", boothowto);
410 debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA);
411 debugf(" MSR = 0x%08x\n", mfmsr());
412 debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0));
413 debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1));
414 debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR));
416 __asm __volatile("msync; isync");
417 csr = ccsr_read4(OCP85XX_L2CTL);
418 debugf(" L2CTL = 0x%08x\n", csr);
421 print_kernel_section_addr();
423 //tlb1_print_entries();
424 //tlb1_print_tlbentries();
429 if (boothowto & RB_KDB)
430 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
433 /* Initialise platform module */
434 platform_probe_and_attach();
436 /* Initialise virtual memory. */
437 pmap_mmu_install(MMU_TYPE_BOOKE, 0);
438 pmap_bootstrap(startkernel, end);
439 debugf("MSR = 0x%08x\n", mfmsr());
440 //tlb1_print_entries();
441 //tlb1_print_tlbentries();
443 /* Initialize params/tunables that are derived from memsize. */
444 init_param2(physmem);
446 /* Finish setting up thread0. */
447 thread0.td_pcb = (struct pcb *)
448 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
449 sizeof(struct pcb)) & ~15);
450 bzero((void *)thread0.td_pcb, sizeof(struct pcb));
451 pc->pc_curpcb = thread0.td_pcb;
453 /* Initialise the message buffer. */
454 msgbufinit(msgbufp, MSGBUF_SIZE);
456 /* Enable Machine Check interrupt. */
457 mtmsr(mfmsr() | PSL_ME);
460 /* Enable D-cache if applicable */
461 csr = mfspr(SPR_L1CSR0);
462 if ((csr & L1CSR0_DCE) == 0) {
467 csr = mfspr(SPR_L1CSR0);
468 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR0_DCE) == 0)
469 printf("L1 D-cache %sabled\n",
470 (csr & L1CSR0_DCE) ? "en" : "dis");
472 /* Enable L1 I-cache if applicable. */
473 csr = mfspr(SPR_L1CSR1);
474 if ((csr & L1CSR1_ICE) == 0) {
479 csr = mfspr(SPR_L1CSR1);
480 if ((boothowto & RB_VERBOSE) != 0 || (csr & L1CSR1_ICE) == 0)
481 printf("L1 I-cache %sabled\n",
482 (csr & L1CSR1_ICE) ? "en" : "dis");
484 debugf("e500_init: SP = 0x%08x\n", ((uintptr_t)thread0.td_pcb - 16) & ~15);
485 debugf("e500_init: e\n");
487 return (((uintptr_t)thread0.td_pcb - 16) & ~15);
490 #define RES_GRANULE 32
491 extern uint32_t tlb0_miss_locks[];
493 /* Initialise a struct pcpu. */
495 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
498 pcpu->pc_tid_next = TID_MIN;
502 int words_per_gran = RES_GRANULE / sizeof(uint32_t);
504 ptr = &tlb0_miss_locks[cpuid * words_per_gran];
505 pcpu->pc_booke_tlb_lock = ptr;
507 *(ptr + 1) = 0; /* recurse counter */
511 /* Set set up registers on exec. */
513 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
515 struct trapframe *tf;
516 struct ps_strings arginfo;
519 bzero(tf, sizeof *tf);
520 tf->fixreg[1] = -roundup(-stack + 8, 16);
523 * XXX Machine-independent code has already copied arguments and
524 * XXX environment to userland. Get them back here.
526 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
529 * Set up arguments for _start():
530 * _start(argc, argv, envp, obj, cleanup, ps_strings);
533 * - obj and cleanup are the auxilliary and termination
534 * vectors. They are fixed up by ld.elf_so.
535 * - ps_strings is a NetBSD extention, and will be
536 * ignored by executables which are strictly
537 * compliant with the SVR4 ABI.
539 * XXX We have to set both regs and retval here due to different
540 * XXX calling convention in trap.c and init_main.c.
543 * XXX PG: these get overwritten in the syscall return code.
544 * execve() should return EJUSTRETURN, like it does on NetBSD.
545 * Emulate by setting the syscall return value cells. The
546 * registers still have to be set for init's fork trampoline.
548 td->td_retval[0] = arginfo.ps_nargvstr;
549 td->td_retval[1] = (register_t)arginfo.ps_argvstr;
550 tf->fixreg[3] = arginfo.ps_nargvstr;
551 tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
552 tf->fixreg[5] = (register_t)arginfo.ps_envstr;
553 tf->fixreg[6] = 0; /* auxillary vector */
554 tf->fixreg[7] = 0; /* termination vector */
555 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */
558 tf->srr1 = PSL_USERSET;
559 td->td_pcb->pcb_flags = 0;
563 fill_regs(struct thread *td, struct reg *regs)
565 struct trapframe *tf;
568 memcpy(regs, tf, sizeof(struct reg));
574 fill_fpregs(struct thread *td, struct fpreg *fpregs)
581 * Flush the D-cache for non-DMA I/O so that the I-cache can
582 * be made coherent later.
585 cpu_flush_dcache(void *ptr, size_t len)
591 * Construct a PCB from a trapframe. This is called from kdb_trap() where
592 * we want to start a backtrace from the function that caused us to enter
593 * the debugger. We have the context in the trapframe, but base the trace
594 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
595 * enough for a backtrace.
598 makectx(struct trapframe *tf, struct pcb *pcb)
601 pcb->pcb_lr = tf->srr0;
602 pcb->pcb_sp = tf->fixreg[1];
606 * get_mcontext/sendsig helper routine that doesn't touch the
610 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
615 memset(mcp, 0, sizeof(mcontext_t));
617 mcp->mc_vers = _MC_VERSION;
619 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
620 if (flags & GET_MC_CLEAR_RET) {
625 /* XXX Altivec context ? */
627 mcp->mc_len = sizeof(*mcp);
632 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
636 error = grab_mcontext(td, mcp, flags);
638 PROC_LOCK(curthread->td_proc);
639 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
640 PROC_UNLOCK(curthread->td_proc);
647 set_mcontext(struct thread *td, const mcontext_t *mcp)
650 struct trapframe *tf;
655 if (mcp->mc_vers != _MC_VERSION || mcp->mc_len != sizeof(*mcp))
658 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
660 /* XXX Altivec context? */
666 sigreturn(struct thread *td, struct sigreturn_args *uap)
672 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
674 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
675 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
679 error = set_mcontext(td, &uc.uc_mcontext);
685 td->td_sigmask = uc.uc_sigmask;
686 SIG_CANTMASK(td->td_sigmask);
690 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
691 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
693 return (EJUSTRETURN);
696 #ifdef COMPAT_FREEBSD4
698 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
701 return sigreturn(td, (struct sigreturn_args *)uap);
708 * Set Wait state enable.
717 if ((msr & PSL_EE) != PSL_EE) {
718 struct thread *td = curthread;
719 printf("td msr %x\n", td->td_md.md_saved_msr);
720 panic("ints disabled in idleproc!");
725 * Freescale E500 core RM section 6.4.1
739 cpu_idle_wakeup(int cpu)
751 if (td->td_md.md_spinlock_count == 0)
752 td->td_md.md_saved_msr = intr_disable();
753 td->td_md.md_spinlock_count++;
764 td->td_md.md_spinlock_count--;
765 if (td->td_md.md_spinlock_count == 0)
766 intr_restore(td->td_md.md_saved_msr);
769 /* Shutdown the CPU as much as possible. */
774 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE));
779 set_regs(struct thread *td, struct reg *regs)
781 struct trapframe *tf;
784 memcpy(tf, regs, sizeof(struct reg));
789 fill_dbregs(struct thread *td, struct dbreg *dbregs)
792 /* No debug registers on PowerPC */
797 set_dbregs(struct thread *td, struct dbreg *dbregs)
800 /* No debug registers on PowerPC */
805 set_fpregs(struct thread *td, struct fpreg *fpregs)
812 ptrace_set_pc(struct thread *td, unsigned long addr)
814 struct trapframe *tf;
817 tf->srr0 = (register_t)addr;
823 ptrace_single_step(struct thread *td)
825 struct trapframe *tf;
829 tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC);
834 ptrace_clear_single_step(struct thread *td)
836 struct trapframe *tf;
840 tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
845 kdb_cpu_clear_singlestep(void)
849 r = mfspr(SPR_DBCR0);
850 mtspr(SPR_DBCR0, r & ~DBCR0_IC);
851 kdb_frame->srr1 &= ~PSL_DE;
855 kdb_cpu_set_singlestep(void)
859 r = mfspr(SPR_DBCR0);
860 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM);
861 kdb_frame->srr1 |= PSL_DE;
865 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
867 struct trapframe *tf;
868 struct sigframe *sfp;
873 int oonstack, rndfsize;
878 PROC_LOCK_ASSERT(p, MA_OWNED);
879 sig = ksi->ksi_signo;
880 code = ksi->ksi_code;
882 mtx_assert(&psp->ps_mtx, MA_OWNED);
884 oonstack = sigonstack(tf->fixreg[1]);
886 rndfsize = ((sizeof(sf) + 15) / 16) * 16;
888 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
894 memset(&sf, 0, sizeof(sf));
895 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
896 sf.sf_uc.uc_sigmask = *mask;
897 sf.sf_uc.uc_stack = td->td_sigstk;
898 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
899 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
901 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
904 * Allocate and validate space for the signal handler context.
906 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
907 SIGISMEMBER(psp->ps_sigonstack, sig)) {
908 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp +
909 td->td_sigstk.ss_size - rndfsize);
911 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize);
915 * Translate the signal if appropriate (Linux emu ?)
917 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
918 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
921 * Save the floating-point state, if necessary, then copy it.
926 * Set up the registers to return to sigcode.
928 * r1/sp - sigframe ptr
929 * lr - sig function, dispatched to by blrl in trampoline
931 * r4 - SIGINFO ? &siginfo : exception code
933 * srr0 - trampoline function addr
935 tf->lr = (register_t)catcher;
936 tf->fixreg[1] = (register_t)sfp;
937 tf->fixreg[FIRSTARG] = sig;
938 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc;
939 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
941 * Signal handler installed with SA_SIGINFO.
943 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si;
946 * Fill siginfo structure.
948 sf.sf_si = ksi->ksi_info;
949 sf.sf_si.si_signo = sig;
950 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ?
951 tf->cpu.booke.dear : tf->srr0);
953 /* Old FreeBSD-style arguments. */
954 tf->fixreg[FIRSTARG+1] = code;
955 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
956 tf->cpu.booke.dear : tf->srr0;
958 mtx_unlock(&psp->ps_mtx);
961 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
964 * copy the frame out to userland.
966 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) {
968 * Process has trashed its stack. Kill it.
970 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
975 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
976 tf->srr0, tf->fixreg[1]);
979 mtx_lock(&psp->ps_mtx);
983 bzero(void *buf, size_t len)
989 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
994 while (len >= sizeof(u_long) * 8) {
996 *((u_long*) p + 1) = 0;
997 *((u_long*) p + 2) = 0;
998 *((u_long*) p + 3) = 0;
999 len -= sizeof(u_long) * 8;
1000 *((u_long*) p + 4) = 0;
1001 *((u_long*) p + 5) = 0;
1002 *((u_long*) p + 6) = 0;
1003 *((u_long*) p + 7) = 0;
1004 p += sizeof(u_long) * 8;
1007 while (len >= sizeof(u_long)) {
1009 len -= sizeof(u_long);
1010 p += sizeof(u_long);
1020 * XXX what is the better/proper place for this routine?
1023 mem_valid(vm_offset_t addr, int len)