2 * Copyright (C) 2006-2012 Semihalf
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("$FreeBSD$");
85 #include "opt_hwpmc_hooks.h"
86 #include "opt_kstack_pages.h"
87 #include "opt_platform.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/rwlock.h>
105 #include <sys/sysctl.h>
106 #include <sys/exec.h>
108 #include <sys/syscallsubr.h>
109 #include <sys/sysproto.h>
110 #include <sys/signalvar.h>
111 #include <sys/sysent.h>
112 #include <sys/imgact.h>
113 #include <sys/msgbuf.h>
114 #include <sys/ptrace.h>
118 #include <vm/vm_extern.h>
119 #include <vm/vm_page.h>
120 #include <vm/vm_object.h>
121 #include <vm/vm_pager.h>
123 #include <machine/cpu.h>
124 #include <machine/kdb.h>
125 #include <machine/reg.h>
126 #include <machine/vmparam.h>
127 #include <machine/spr.h>
128 #include <machine/hid.h>
129 #include <machine/psl.h>
130 #include <machine/trap.h>
131 #include <machine/md_var.h>
132 #include <machine/mmuvar.h>
133 #include <machine/sigframe.h>
134 #include <machine/machdep.h>
135 #include <machine/metadata.h>
136 #include <machine/platform.h>
138 #include <sys/linker.h>
139 #include <sys/reboot.h>
141 #include <contrib/libfdt/libfdt.h>
142 #include <dev/fdt/fdt_common.h>
143 #include <dev/ofw/openfirm.h>
150 #define debugf(fmt, args...) printf(fmt, ##args)
152 #define debugf(fmt, args...)
155 extern unsigned char _etext[];
156 extern unsigned char _edata[];
157 extern unsigned char __bss_start[];
158 extern unsigned char __sbss_start[];
159 extern unsigned char __sbss_end[];
160 extern unsigned char _end[];
161 extern vm_offset_t __endkernel;
162 extern vm_paddr_t kernload;
165 * Bootinfo is passed to us by legacy loaders. Save the address of the
166 * structure to handle backward compatibility.
170 void print_kernel_section_addr(void);
171 void print_kenv(void);
172 uintptr_t booke_init(u_long, u_long);
173 void ivor_setup(void);
175 extern void *interrupt_vector_base;
176 extern void *int_critical_input;
177 extern void *int_machine_check;
178 extern void *int_data_storage;
179 extern void *int_instr_storage;
180 extern void *int_external_input;
181 extern void *int_alignment;
182 extern void *int_fpu;
183 extern void *int_program;
184 extern void *int_syscall;
185 extern void *int_decrementer;
186 extern void *int_fixed_interval_timer;
187 extern void *int_watchdog;
188 extern void *int_data_tlb_error;
189 extern void *int_inst_tlb_error;
190 extern void *int_debug;
191 extern void *int_debug_ed;
192 extern void *int_vec;
193 extern void *int_vecast;
195 extern void *int_spe_fpdata;
196 extern void *int_spe_fpround;
199 extern void *int_performance_counter;
202 #define SET_TRAP(ivor, handler) \
203 KASSERT(((uintptr_t)(&handler) & ~0xffffUL) == \
204 ((uintptr_t)(&interrupt_vector_base) & ~0xffffUL), \
205 ("Handler " #handler " too far from interrupt vector base")); \
206 mtspr(ivor, (uintptr_t)(&handler) & 0xffffUL);
208 uintptr_t powerpc_init(vm_offset_t fdt, vm_offset_t, vm_offset_t, void *mdp,
209 uint32_t mdp_cookie);
210 void booke_cpu_init(void);
216 cpu_features |= PPC_FEATURE_BOOKE;
218 psl_kernset = PSL_CE | PSL_ME | PSL_EE;
220 psl_kernset |= PSL_CM;
222 psl_userset = psl_kernset | PSL_PR;
224 psl_userset32 = psl_userset & ~PSL_CM;
227 * Zeroed bits in this variable signify that the value of the bit
228 * in its position is allowed to vary between userspace contexts.
230 * All other bits are required to be identical for every userspace
231 * context. The actual *value* of the bit is determined by
232 * psl_userset and/or psl_userset32, and is not allowed to change.
234 * Remember to update this set when implementing support for
235 * *conditionally* enabling a processor facility. Failing to do
236 * this will cause swapcontext() in userspace to break when a
237 * process uses a conditionally-enabled facility.
239 * When *unconditionally* implementing support for a processor
240 * facility, update psl_userset / psl_userset32 instead.
242 * See the access control check in set_mcontext().
244 psl_userstatic = ~(PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1);
246 pmap_mmu_install(MMU_TYPE_BOOKE, BUS_PROBE_GENERIC);
253 mtspr(SPR_IVPR, ((uintptr_t)&interrupt_vector_base) & ~0xffffUL);
255 SET_TRAP(SPR_IVOR0, int_critical_input);
256 SET_TRAP(SPR_IVOR1, int_machine_check);
257 SET_TRAP(SPR_IVOR2, int_data_storage);
258 SET_TRAP(SPR_IVOR3, int_instr_storage);
259 SET_TRAP(SPR_IVOR4, int_external_input);
260 SET_TRAP(SPR_IVOR5, int_alignment);
261 SET_TRAP(SPR_IVOR6, int_program);
262 SET_TRAP(SPR_IVOR8, int_syscall);
263 SET_TRAP(SPR_IVOR10, int_decrementer);
264 SET_TRAP(SPR_IVOR11, int_fixed_interval_timer);
265 SET_TRAP(SPR_IVOR12, int_watchdog);
266 SET_TRAP(SPR_IVOR13, int_data_tlb_error);
267 SET_TRAP(SPR_IVOR14, int_inst_tlb_error);
268 SET_TRAP(SPR_IVOR15, int_debug);
270 SET_TRAP(SPR_IVOR35, int_performance_counter);
272 switch ((mfpvr() >> 16) & 0xffff) {
274 SET_TRAP(SPR_IVOR32, int_vec);
275 SET_TRAP(SPR_IVOR33, int_vecast);
279 SET_TRAP(SPR_IVOR7, int_fpu);
280 SET_TRAP(SPR_IVOR15, int_debug_ed);
284 SET_TRAP(SPR_IVOR32, int_vec);
286 SET_TRAP(SPR_IVOR33, int_spe_fpdata);
287 SET_TRAP(SPR_IVOR34, int_spe_fpround);
293 /* Set 64-bit interrupt mode. */
294 mtspr(SPR_EPCR, mfspr(SPR_EPCR) | EPCR_ICM);
299 booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp)
307 ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE);
308 if (fdt_check_header(ptr) != 0)
312 * Read FDT total size from the header of FDT.
313 * This for sure hits within first page which is
316 fdt_size = fdt_totalsize((void *)ptr);
319 * Ok, arg1 points to FDT, so we need to map it in.
320 * First, unmap this page and then map FDT again with full size
322 pmap_early_io_unmap((vm_offset_t)ptr, PAGE_SIZE);
323 ptr = (void *)pmap_early_io_map(arg1, fdt_size);
324 *dtbp = (vm_offset_t)ptr;
330 booke_init(u_long arg1, u_long arg2)
334 vm_offset_t dtbp, end;
336 end = (uintptr_t)_end;
337 dtbp = (vm_offset_t)NULL;
339 /* Set up TLB initially */
341 bzero(__sbss_start, __sbss_end - __sbss_start);
342 bzero(__bss_start, _end - __bss_start);
346 * Handle the various ways we can get loaded and started:
347 * - FreeBSD's loader passes the pointer to the metadata
348 * in arg1, with arg2 undefined. arg1 has a value that's
349 * relative to the kernel's link address (i.e. larger
351 * - Juniper's loader passes the metadata pointer in arg2
352 * and sets arg1 to zero. This is to signal that the
353 * loader maps the kernel and starts it at its link
354 * address (unlike the FreeBSD loader).
355 * - U-Boot passes the standard argc and argv parameters
356 * in arg1 and arg2 (resp). arg1 is between 1 and some
357 * relatively small number, such as 64K. arg2 is the
358 * physical address of the argv vector.
359 * - ePAPR loaders pass an FDT blob in r3 (arg1) and the magic hex
360 * string 0x45504150 ('EPAP') in r6 (which has been lost by now).
361 * r4 (arg2) is supposed to be set to zero, but is not always.
364 if (arg1 == 0) /* Juniper loader */
366 else if (booke_check_for_fdt(arg1, &dtbp) == 0) { /* ePAPR */
367 end = roundup(end, 8);
368 memmove((void *)end, (void *)dtbp, fdt_totalsize((void *)dtbp));
370 end += fdt_totalsize((void *)dtbp);
373 } else if (arg1 > (uintptr_t)kernload) /* FreeBSD loader */
378 /* Default to 32 byte cache line size. */
379 switch ((mfpvr()) >> 16) {
388 * Last element is a magic cookie that indicates that the metadata
389 * pointer is meaningful.
391 ret = powerpc_init(dtbp, 0, 0, mdp, (mdp == NULL) ? 0 : 0xfb5d104d);
394 booke_enable_l1_cache();
395 booke_enable_l2_cache();
397 booke_enable_bpred();
402 #define RES_GRANULE cacheline_size
403 extern uintptr_t tlb0_miss_locks[];
405 /* Initialise a struct pcpu. */
407 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
410 pcpu->pc_booke.tid_next = TID_MIN;
414 int words_per_gran = RES_GRANULE / sizeof(uintptr_t);
416 ptr = &tlb0_miss_locks[cpuid * words_per_gran];
417 pcpu->pc_booke.tlb_lock = ptr;
419 *(ptr + 1) = 0; /* recurse counter */
423 /* Shutdown the CPU as much as possible. */
428 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE));
434 ptrace_single_step(struct thread *td)
436 struct trapframe *tf;
440 tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC);
445 ptrace_clear_single_step(struct thread *td)
447 struct trapframe *tf;
451 tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
456 kdb_cpu_clear_singlestep(void)
460 r = mfspr(SPR_DBCR0);
461 mtspr(SPR_DBCR0, r & ~DBCR0_IC);
462 kdb_frame->srr1 &= ~PSL_DE;
466 kdb_cpu_set_singlestep(void)
470 r = mfspr(SPR_DBCR0);
471 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM);
472 kdb_frame->srr1 |= PSL_DE;