Annotation of src/sys/arch/evbarm/integrator/integrator_machdep.c, Revision 1.47
1.47 ! rearnsha 1: /* $NetBSD: integrator_machdep.c,v 1.46 2003/09/06 10:28:26 rearnsha Exp $ */
1.1 rearnsha 2:
3: /*
1.23 rearnsha 4: * Copyright (c) 2001,2002 ARM Ltd
1.1 rearnsha 5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. The name of the company may not be used to endorse or promote
16: * products derived from this software without specific prior written
17: * permission.
18: *
1.23 rearnsha 19: * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND
20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD
23: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29: * POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: /*
1.1 rearnsha 33: * Copyright (c) 1997,1998 Mark Brinicombe.
34: * Copyright (c) 1997,1998 Causality Limited.
35: * All rights reserved.
36: *
37: * Redistribution and use in source and binary forms, with or without
38: * modification, are permitted provided that the following conditions
39: * are met:
40: * 1. Redistributions of source code must retain the above copyright
41: * notice, this list of conditions and the following disclaimer.
42: * 2. Redistributions in binary form must reproduce the above copyright
43: * notice, this list of conditions and the following disclaimer in the
44: * documentation and/or other materials provided with the distribution.
45: * 3. All advertising materials mentioning features or use of this software
46: * must display the following acknowledgement:
47: * This product includes software developed by Mark Brinicombe
48: * for the NetBSD Project.
49: * 4. The name of the company nor the name of the author may be used to
50: * endorse or promote products derived from this software without specific
51: * prior written permission.
52: *
53: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
54: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
55: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
56: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
57: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
58: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
59: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63: * SUCH DAMAGE.
64: *
65: * Machine dependant functions for kernel setup for integrator board
66: *
67: * Created : 24/11/97
68: */
1.43 lukem 69:
70: #include <sys/cdefs.h>
1.47 ! rearnsha 71: __KERNEL_RCSID(0, "$NetBSD: integrator_machdep.c,v 1.46 2003/09/06 10:28:26 rearnsha Exp $");
1.1 rearnsha 72:
73: #include "opt_ddb.h"
74: #include "opt_pmap_debug.h"
75:
76: #include <sys/param.h>
77: #include <sys/device.h>
78: #include <sys/systm.h>
79: #include <sys/kernel.h>
80: #include <sys/exec.h>
81: #include <sys/proc.h>
82: #include <sys/msgbuf.h>
83: #include <sys/reboot.h>
84: #include <sys/termios.h>
1.32 ragge 85: #include <sys/ksyms.h>
1.1 rearnsha 86:
1.31 thorpej 87: #include <uvm/uvm_extern.h>
88:
1.1 rearnsha 89: #include <dev/cons.h>
90:
91: #include <machine/db_machdep.h>
92: #include <ddb/db_sym.h>
93: #include <ddb/db_extern.h>
94:
95: #include <machine/bootconfig.h>
96: #include <machine/bus.h>
97: #include <machine/cpu.h>
98: #include <machine/frame.h>
99: #include <machine/intr.h>
1.8 thorpej 100: #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */
1.6 thorpej 101: #include <arm/undefined.h>
1.1 rearnsha 102:
1.23 rearnsha 103: #include <arm/arm32/machdep.h>
104:
1.1 rearnsha 105: #include <evbarm/integrator/integrator_boot.h>
106:
107: #include "opt_ipkdb.h"
108: #include "pci.h"
1.32 ragge 109: #include "ksyms.h"
1.1 rearnsha 110:
111: void ifpga_reset(void) __attribute__((noreturn));
1.36 thorpej 112:
113: /* Kernel text starts 2MB in from the bottom of the kernel address space. */
114: #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
1.39 thorpej 115: #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
1.40 thorpej 116:
117: /*
118: * The range 0xc1000000 - 0xccffffff is available for kernel VM space
119: * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
120: */
121: #define KERNEL_VM_SIZE 0x0C000000
1.36 thorpej 122:
1.1 rearnsha 123: /*
124: * Address to call from cpu_reset() to reset the machine.
125: * This is machine architecture dependant as it varies depending
126: * on where the ROM appears when you turn the MMU off.
127: */
128:
129: u_int cpu_reset_address = (u_int) ifpga_reset;
130:
131: /* Define various stack sizes in pages */
132: #define IRQ_STACK_SIZE 1
133: #define ABT_STACK_SIZE 1
134: #ifdef IPKDB
135: #define UND_STACK_SIZE 2
136: #else
137: #define UND_STACK_SIZE 1
138: #endif
139:
140: BootConfig bootconfig; /* Boot config storage */
141: char *boot_args = NULL;
142: char *boot_file = NULL;
143:
144: vm_offset_t physical_start;
145: vm_offset_t physical_end;
146: vm_offset_t pagetables_start;
147: int physmem = 0;
148:
149: /*int debug_flags;*/
150: #ifndef PMAP_STATIC_L1S
151: int max_processes = 64; /* Default number */
152: #endif /* !PMAP_STATIC_L1S */
153:
154: /* Physical and virtual addresses for some global pages */
155: pv_addr_t systempage;
156: pv_addr_t irqstack;
157: pv_addr_t undstack;
158: pv_addr_t abtstack;
159: pv_addr_t kernelstack;
160:
161: vm_offset_t msgbufphys;
162:
163: extern u_int data_abort_handler_address;
164: extern u_int prefetch_abort_handler_address;
165: extern u_int undefined_handler_address;
166:
167: #ifdef PMAP_DEBUG
168: extern int pmap_debug_level;
169: #endif
170:
1.23 rearnsha 171: #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
172:
173: #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
174: #define KERNEL_PT_KERNEL_NUM 2
175: /* L2 tables for mapping kernel VM */
176: #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
1.17 chris 177: #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
1.1 rearnsha 178: #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
179:
1.14 thorpej 180: pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
1.1 rearnsha 181:
182: struct user *proc0paddr;
183:
184: /* Prototypes */
185:
1.23 rearnsha 186: static void integrator_sdram_bounds (paddr_t *, psize_t *);
1.1 rearnsha 187:
1.23 rearnsha 188: void consinit(void);
1.1 rearnsha 189:
190: /* A load of console goo. */
191: #include "vga.h"
1.23 rearnsha 192: #if NVGA > 0
1.1 rearnsha 193: #include <dev/ic/mc6845reg.h>
194: #include <dev/ic/pcdisplayvar.h>
195: #include <dev/ic/vgareg.h>
196: #include <dev/ic/vgavar.h>
197: #endif
198:
199: #include "pckbc.h"
1.23 rearnsha 200: #if NPCKBC > 0
1.1 rearnsha 201: #include <dev/ic/i8042reg.h>
202: #include <dev/ic/pckbcvar.h>
203: #endif
204:
205: #include "com.h"
1.23 rearnsha 206: #if NCOM > 0
1.1 rearnsha 207: #include <dev/ic/comreg.h>
208: #include <dev/ic/comvar.h>
209: #ifndef CONCOMADDR
210: #define CONCOMADDR 0x3f8
211: #endif
212: #endif
213:
1.23 rearnsha 214: /*
215: * Define the default console speed for the board. This is generally
216: * what the firmware provided with the board defaults to.
217: */
1.30 mycroft 218: #ifndef CONSPEED
1.1 rearnsha 219: #define CONSPEED B115200
220: #endif
221: #ifndef CONMODE
222: #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
223: #endif
224:
225: int comcnspeed = CONSPEED;
226: int comcnmode = CONMODE;
227:
228: #include "plcom.h"
229: #if (NPLCOM > 0)
230: #include <evbarm/dev/plcomreg.h>
231: #include <evbarm/dev/plcomvar.h>
232:
233: #include <evbarm/ifpga/ifpgamem.h>
234: #include <evbarm/ifpga/ifpgareg.h>
235: #include <evbarm/ifpga/ifpgavar.h>
236: #endif
237:
238: #ifndef CONSDEVNAME
239: #define CONSDEVNAME "plcom"
240: #endif
241:
242: #ifndef PLCONSPEED
243: #define PLCONSPEED B38400
244: #endif
245: #ifndef PLCONMODE
246: #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
247: #endif
248: #ifndef PLCOMCNUNIT
249: #define PLCOMCNUNIT -1
250: #endif
251:
252: int plcomcnspeed = PLCONSPEED;
253: int plcomcnmode = PLCONMODE;
254:
255: #if 0
256: extern struct consdev kcomcons;
257: static void kcomcnputc(dev_t, int);
258: #endif
259:
260: /*
261: * void cpu_reboot(int howto, char *bootstr)
262: *
263: * Reboots the system
264: *
265: * Deal with any syncing, unmounting, dumping and shutdown hooks,
266: * then reset the CPU.
267: */
268: void
1.23 rearnsha 269: cpu_reboot(int howto, char *bootstr)
1.1 rearnsha 270: {
271:
272: /*
273: * If we are still cold then hit the air brakes
274: * and crash to earth fast
275: */
276: if (cold) {
277: doshutdownhooks();
278: printf("The operating system has halted.\n");
279: printf("Please press any key to reboot.\n\n");
280: cngetc();
281: printf("rebooting...\n");
282: ifpga_reset();
283: /*NOTREACHED*/
284: }
285:
286: /* Disable console buffering */
287:
288: /*
289: * If RB_NOSYNC was not specified sync the discs.
1.23 rearnsha 290: * Note: Unless cold is set to 1 here, syslogd will die during the
291: * unmount. It looks like syslogd is getting woken up only to find
292: * that it cannot page part of the binary in as the filesystem has
293: * been unmounted.
1.1 rearnsha 294: */
295: if (!(howto & RB_NOSYNC))
296: bootsync();
297:
298: /* Say NO to interrupts */
299: splhigh();
300:
301: /* Do a dump if requested. */
302: if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
303: dumpsys();
304:
305: /* Run any shutdown hooks */
306: doshutdownhooks();
307:
308: /* Make sure IRQ's are disabled */
309: IRQdisable;
310:
311: if (howto & RB_HALT) {
312: printf("The operating system has halted.\n");
313: printf("Please press any key to reboot.\n\n");
314: cngetc();
315: }
316:
317: printf("rebooting...\n");
318: ifpga_reset();
319: /*NOTREACHED*/
320: }
321:
1.42 thorpej 322: /* Statically mapped devices. */
323: static const struct pmap_devmap integrator_devmap[] = {
1.1 rearnsha 324: #if NPLCOM > 0 && defined(PLCONSOLE)
1.23 rearnsha 325: {
326: UART0_BOOT_BASE,
327: IFPGA_IO_BASE + IFPGA_UART0,
328: 1024 * 1024,
329: VM_PROT_READ|VM_PROT_WRITE,
330: PTE_NOCACHE
331: },
332:
333: {
334: UART1_BOOT_BASE,
335: IFPGA_IO_BASE + IFPGA_UART1,
336: 1024 * 1024,
337: VM_PROT_READ|VM_PROT_WRITE,
338: PTE_NOCACHE
339: },
1.1 rearnsha 340: #endif
341: #if NPCI > 0
1.23 rearnsha 342: {
343: IFPGA_PCI_IO_VBASE,
344: IFPGA_PCI_IO_BASE,
345: IFPGA_PCI_IO_VSIZE,
346: VM_PROT_READ|VM_PROT_WRITE,
347: PTE_NOCACHE
348: },
349:
350: {
351: IFPGA_PCI_CONF_VBASE,
352: IFPGA_PCI_CONF_BASE,
353: IFPGA_PCI_CONF_VSIZE,
354: VM_PROT_READ|VM_PROT_WRITE,
1.42 thorpej 355: PTE_NOCACHE
356: },
1.1 rearnsha 357: #endif
358:
1.23 rearnsha 359: {
360: 0,
361: 0,
362: 0,
363: 0,
364: 0
365: }
1.1 rearnsha 366: };
367:
368: /*
1.23 rearnsha 369: * u_int initarm(...)
1.1 rearnsha 370: *
371: * Initial entry point on startup. This gets called before main() is
372: * entered.
373: * It should be responsible for setting up everything that must be
374: * in place when main is called.
375: * This includes
376: * Taking a copy of the boot configuration structure.
377: * Initialising the physical console so characters can be printed.
378: * Setting up page tables for the kernel
379: * Relocating the kernel to the bottom of physical memory
380: */
381:
382: u_int
1.23 rearnsha 383: initarm(void *arg)
1.1 rearnsha 384: {
385: int loop;
386: int loop1;
387: u_int l1pagetable;
1.47 ! rearnsha 388: extern char etext asm ("_etext");
! 389: extern char end asm ("_end");
1.1 rearnsha 390: pv_addr_t kernel_l1pt;
1.23 rearnsha 391: paddr_t memstart;
392: psize_t memsize;
1.47 ! rearnsha 393: vm_offset_t physical_freestart;
! 394: vm_offset_t physical_freeend;
1.1 rearnsha 395: #if NPLCOM > 0 && defined(PLCONSOLE)
396: static struct bus_space plcom_bus_space;
397: #endif
398:
399: /*
400: * Heads up ... Setup the CPU / MMU / TLB functions
401: */
402: if (set_cpufuncs())
403: panic("cpu not recognized!");
404:
405: #if NPLCOM > 0 && defined(PLCONSOLE)
406: /*
407: * Initialise the diagnostic serial console
408: * This allows a means of generating output during initarm().
409: * Once all the memory map changes are complete we can call consinit()
410: * and not have to worry about things moving.
411: */
412:
413: if (PLCOMCNUNIT == 0) {
414: ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000);
415: plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
416: IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT);
417: } else if (PLCOMCNUNIT == 1) {
418: ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000);
419: plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
420: IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT);
421: }
422: #endif
423:
1.38 thorpej 424: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 425: /* Talk to the user */
1.23 rearnsha 426: printf("\nNetBSD/evbarm (Integrator) booting ...\n");
1.38 thorpej 427: #endif
1.1 rearnsha 428:
429: /*
1.23 rearnsha 430: * Fetch the SDRAM start/size from the CM configuration registers.
1.1 rearnsha 431: */
1.23 rearnsha 432: integrator_sdram_bounds(&memstart, &memsize);
1.1 rearnsha 433:
1.38 thorpej 434: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 435: printf("initarm: Configuring system ...\n");
1.38 thorpej 436: #endif
1.1 rearnsha 437:
1.23 rearnsha 438: /* Fake bootconfig structure for the benefit of pmap.c */
439: /* XXX must make the memory description h/w independent */
440: bootconfig.dramblocks = 1;
441: bootconfig.dram[0].address = memstart;
1.31 thorpej 442: bootconfig.dram[0].pages = memsize / PAGE_SIZE;
1.47 ! rearnsha 443: bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER;
1.23 rearnsha 444:
1.1 rearnsha 445: /*
446: * Set up the variables that define the availablilty of
1.23 rearnsha 447: * physical memory. For now, we're going to set
448: * physical_freestart to 0x00200000 (where the kernel
449: * was loaded), and allocate the memory we need downwards.
450: * If we get too close to the L1 table that we set up, we
451: * will panic. We will update physical_freestart and
452: * physical_freeend later to reflect what pmap_bootstrap()
453: * wants to see.
454: *
1.47 ! rearnsha 455: * We assume that the kernel is loaded into bank[0].
! 456: *
1.23 rearnsha 457: * XXX pmap_bootstrap() needs an enema.
1.1 rearnsha 458: */
1.23 rearnsha 459: physical_start = bootconfig.dram[0].address;
1.47 ! rearnsha 460: physical_end = 0;
1.1 rearnsha 461:
1.47 ! rearnsha 462: /* Update the address of the first free 16KB chunk of physical memory */
! 463: physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET)
! 464: & ~PGOFSET;
! 465: if (physical_freestart < bootconfig.dram[0].address)
! 466: physical_freestart = bootconfig.dram[0].address;
! 467: physical_freeend = bootconfig.dram[0].address +
! 468: bootconfig.dram[0].pages * PAGE_SIZE;
! 469:
! 470: for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) {
! 471: paddr_t memoryblock_end;
! 472:
! 473: memoryblock_end = bootconfig.dram[loop].address +
! 474: bootconfig.dram[loop].pages * PAGE_SIZE;
! 475: if (memoryblock_end > physical_end)
! 476: physical_end = memoryblock_end;
! 477: if (bootconfig.dram[loop].address < physical_start)
! 478: physical_start = bootconfig.dram[loop].address;
! 479:
! 480: physmem += bootconfig.dram[loop].pages;
! 481: }
1.1 rearnsha 482:
1.38 thorpej 483: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 484: /* Tell the user about the memory */
485: printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
486: physical_start, physical_end - 1);
1.38 thorpej 487: #endif
1.1 rearnsha 488:
489: /*
1.23 rearnsha 490: * Okay, the kernel starts 2MB in from the bottom of physical
491: * memory. We are going to allocate our bootstrap pages downwards
492: * from there.
1.1 rearnsha 493: *
1.23 rearnsha 494: * We need to allocate some fixed page tables to get the kernel
495: * going. We allocate one page directory and a number of page
496: * tables and store the physical addresses in the kernel_pt_table
497: * array.
498: *
499: * The kernel page directory must be on a 16K boundary. The page
500: * tables must be on 4K bounaries. What we do is allocate the
501: * page directory on the first 16K boundary that we encounter, and
502: * the page tables on 4K boundaries otherwise. Since we allocate
503: * at least 3 L2 page tables, we are guaranteed to encounter at
504: * least one 16K aligned region.
1.1 rearnsha 505: */
506:
507: #ifdef VERBOSE_INIT_ARM
508: printf("Allocating page tables\n");
509: #endif
510:
511: #ifdef VERBOSE_INIT_ARM
1.47 ! rearnsha 512: printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n",
! 513: physical_freestart, physmem, physmem);
1.1 rearnsha 514: #endif
515:
516: /* Define a macro to simplify memory allocation */
1.23 rearnsha 517: #define valloc_pages(var, np) \
518: alloc_pages((var).pv_pa, (np)); \
1.47 ! rearnsha 519: (var).pv_va = KERNEL_BASE + (var).pv_pa;
1.23 rearnsha 520:
521: #define alloc_pages(var, np) \
1.47 ! rearnsha 522: (var) = physical_freestart; \
! 523: physical_freestart += ((np) * PAGE_SIZE); \
1.23 rearnsha 524: if (physical_freeend < physical_freestart) \
525: panic("initarm: out of memory"); \
1.31 thorpej 526: memset((char *)(var), 0, ((np) * PAGE_SIZE));
1.1 rearnsha 527:
528: loop1 = 0;
529: kernel_l1pt.pv_pa = 0;
530: for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
531: /* Are we 16KB aligned for an L1 ? */
1.47 ! rearnsha 532: if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
1.1 rearnsha 533: && kernel_l1pt.pv_pa == 0) {
1.31 thorpej 534: valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
1.1 rearnsha 535: } else {
1.33 thorpej 536: valloc_pages(kernel_pt_table[loop1],
537: L2_TABLE_SIZE / PAGE_SIZE);
1.23 rearnsha 538: ++loop1;
1.1 rearnsha 539: }
540: }
541:
542: /* This should never be able to happen but better confirm that. */
1.21 thorpej 543: if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
1.28 provos 544: panic("initarm: Failed to align the kernel page directory");
1.1 rearnsha 545:
546: /*
547: * Allocate a page for the system page mapped to V0x00000000
548: * This page will just contain the system vectors and can be
549: * shared by all processes.
550: */
551: alloc_pages(systempage.pv_pa, 1);
552:
553: /* Allocate stacks for all modes */
554: valloc_pages(irqstack, IRQ_STACK_SIZE);
555: valloc_pages(abtstack, ABT_STACK_SIZE);
556: valloc_pages(undstack, UND_STACK_SIZE);
557: valloc_pages(kernelstack, UPAGES);
558:
559: #ifdef VERBOSE_INIT_ARM
1.23 rearnsha 560: printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
561: irqstack.pv_va);
562: printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
563: abtstack.pv_va);
564: printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
565: undstack.pv_va);
566: printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
567: kernelstack.pv_va);
1.1 rearnsha 568: #endif
569:
1.31 thorpej 570: alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
1.1 rearnsha 571:
572: /*
573: * Ok we have allocated physical pages for the primary kernel
574: * page tables
575: */
576:
577: #ifdef VERBOSE_INIT_ARM
1.23 rearnsha 578: printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
1.1 rearnsha 579: #endif
580:
581: /*
1.23 rearnsha 582: * Now we start construction of the L1 page table
1.1 rearnsha 583: * We start by mapping the L2 page tables into the L1.
584: * This means that we can replace L1 mappings later on if necessary
585: */
586: l1pagetable = kernel_l1pt.pv_pa;
587:
588: /* Map the L2 pages tables in the L1 page table */
1.11 thorpej 589: pmap_link_l2pt(l1pagetable, 0x00000000,
1.14 thorpej 590: &kernel_pt_table[KERNEL_PT_SYS]);
1.23 rearnsha 591: for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
592: pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
593: &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
594: for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
1.11 thorpej 595: pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
1.14 thorpej 596: &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
1.17 chris 597:
598: /* update the top of the kernel VM */
1.19 thorpej 599: pmap_curmaxkvaddr =
600: KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
1.1 rearnsha 601:
602: #ifdef VERBOSE_INIT_ARM
603: printf("Mapping kernel\n");
604: #endif
605:
606: /* Now we fill in the L2 pagetable for the kernel static code/data */
607: {
608: size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE;
609: size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE;
1.23 rearnsha 610: u_int logical;
1.1 rearnsha 611:
1.23 rearnsha 612: textsize = (textsize + PGOFSET) & ~PGOFSET;
1.1 rearnsha 613: totalsize = (totalsize + PGOFSET) & ~PGOFSET;
1.23 rearnsha 614:
615: logical = 0x00200000; /* offset of kernel in RAM */
616:
617: logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
1.47 ! rearnsha 618: logical, textsize, VM_PROT_READ | VM_PROT_WRITE,
! 619: PTE_CACHE);
1.23 rearnsha 620: logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
1.47 ! rearnsha 621: logical, totalsize - textsize,
! 622: VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
1.1 rearnsha 623: }
624:
625: #ifdef VERBOSE_INIT_ARM
626: printf("Constructing L2 page tables\n");
627: #endif
628:
629: /* Map the stack pages */
1.14 thorpej 630: pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
1.31 thorpej 631: IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1.14 thorpej 632: pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
1.31 thorpej 633: ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1.14 thorpej 634: pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
1.31 thorpej 635: UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1.14 thorpej 636: pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
1.31 thorpej 637: UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1.13 thorpej 638:
1.33 thorpej 639: pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
640: L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
1.1 rearnsha 641:
1.33 thorpej 642: for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
643: pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
1.44 rearnsha 644: kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
1.33 thorpej 645: VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
646: }
1.1 rearnsha 647:
1.20 thorpej 648: /* Map the vector page. */
1.1 rearnsha 649: #if 1
650: /* MULTI-ICE requires that page 0 is NC/NB so that it can download
651: the cache-clean code there. */
1.20 thorpej 652: pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
1.10 thorpej 653: VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
1.1 rearnsha 654: #else
1.20 thorpej 655: pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
656: VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
1.1 rearnsha 657: #endif
658:
1.42 thorpej 659: /* Map the statically mapped devices. */
660: pmap_devmap_bootstrap(l1pagetable, integrator_devmap);
1.1 rearnsha 661:
662: /*
663: * Now we have the real page tables in place so we can switch to them.
1.23 rearnsha 664: * Once this is done we will be running with the REAL kernel page
665: * tables.
666: */
667:
1.1 rearnsha 668: /* Switch tables */
669: #ifdef VERBOSE_INIT_ARM
670: printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
671: #endif
1.33 thorpej 672: cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
1.1 rearnsha 673: setttb(kernel_l1pt.pv_pa);
1.23 rearnsha 674: cpu_tlb_flushID();
1.33 thorpej 675: cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
676:
677: /*
678: * Moved from cpu_startup() as data_abort_handler() references
679: * this during uvm init
680: */
681: proc0paddr = (struct user *)kernelstack.pv_va;
682: lwp0.l_addr = proc0paddr;
1.1 rearnsha 683:
684: #ifdef PLCONSOLE
685: /*
686: * The IFPGA registers have just moved.
687: * Detach the diagnostic serial port and reattach at the new address.
688: */
689: plcomcndetach();
690: #endif
691:
692: /*
693: * XXX this should only be done in main() but it useful to
694: * have output earlier ...
695: */
696: consinit();
697:
698: #ifdef VERBOSE_INIT_ARM
699: printf("bootstrap done.\n");
700: #endif
701:
1.20 thorpej 702: arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
1.1 rearnsha 703:
704: /*
705: * Pages were allocated during the secondary bootstrap for the
706: * stacks for different CPU modes.
707: * We must now set the r13 registers in the different CPU modes to
708: * point to these stacks.
709: * Since the ARM stacks use STMFD etc. we must set r13 to the top end
710: * of the stack memory.
711: */
1.38 thorpej 712: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 713: printf("init subsystems: stacks ");
1.38 thorpej 714: #endif
1.1 rearnsha 715:
1.31 thorpej 716: set_stackptr(PSR_IRQ32_MODE,
717: irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
718: set_stackptr(PSR_ABT32_MODE,
719: abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
720: set_stackptr(PSR_UND32_MODE,
721: undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
1.1 rearnsha 722:
723: /*
724: * Well we should set a data abort handler.
1.23 rearnsha 725: * Once things get going this will change as we will need a proper
726: * handler.
1.1 rearnsha 727: * Until then we will use a handler that just panics but tells us
728: * why.
729: * Initialisation of the vectors will just panic on a data abort.
730: * This just fills in a slighly better one.
731: */
1.38 thorpej 732: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 733: printf("vectors ");
1.38 thorpej 734: #endif
1.1 rearnsha 735: data_abort_handler_address = (u_int)data_abort_handler;
736: prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
737: undefined_handler_address = (u_int)undefinedinstruction_bounce;
738:
739: /* Initialise the undefined instruction handlers */
1.38 thorpej 740: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 741: printf("undefined ");
1.38 thorpej 742: #endif
1.1 rearnsha 743: undefined_init();
744:
1.25 thorpej 745: /* Load memory into UVM. */
1.38 thorpej 746: #ifdef VERBOSE_INIT_ARM
1.25 thorpej 747: printf("page ");
1.38 thorpej 748: #endif
1.25 thorpej 749: uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
1.47 ! rearnsha 750:
! 751: /* Round the start up and the end down to a page. */
! 752: physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET;
! 753: physical_freeend &= ~PGOFSET;
! 754:
! 755: for (loop = 0; loop < bootconfig.dramblocks; loop++) {
! 756: paddr_t block_start = (paddr_t) bootconfig.dram[loop].address;
! 757: paddr_t block_end = block_start +
! 758: (bootconfig.dram[loop].pages * PAGE_SIZE);
! 759:
! 760: if (loop == 0) {
! 761: block_start = physical_freestart;
! 762: block_end = physical_freeend;
! 763: }
! 764:
! 765:
! 766: uvm_page_physload(atop(block_start), atop(block_end),
! 767: atop(block_start), atop(block_end),
! 768: (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ?
! 769: VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1);
! 770: }
1.25 thorpej 771:
1.1 rearnsha 772: /* Boot strap pmap telling it where the kernel page table is */
1.38 thorpej 773: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 774: printf("pmap ");
1.38 thorpej 775: #endif
1.35 thorpej 776: pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE,
777: KERNEL_VM_BASE + KERNEL_VM_SIZE);
1.1 rearnsha 778:
779: /* Setup the IRQ system */
1.38 thorpej 780: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 781: printf("irq ");
1.38 thorpej 782: #endif
1.1 rearnsha 783: irq_init();
784:
1.38 thorpej 785: #ifdef VERBOSE_INIT_ARM
1.1 rearnsha 786: printf("done.\n");
1.38 thorpej 787: #endif
1.1 rearnsha 788:
789: #ifdef IPKDB
790: /* Initialise ipkdb */
791: ipkdb_init();
792: if (boothowto & RB_KDB)
793: ipkdb_connect(0);
794: #endif
795:
1.32 ragge 796: #if NKSYMS || defined(DDB) || defined(LKM)
797: /* Firmware doesn't load symbols. */
798: ksyms_init(0, NULL, NULL);
799: #endif
800:
1.1 rearnsha 801: #ifdef DDB
802: db_machine_init();
803: if (boothowto & RB_KDB)
804: Debugger();
805: #endif
806:
807: /* We return the new stack pointer address */
808: return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
809: }
810:
811: void
812: consinit(void)
813: {
814: static int consinit_called = 0;
815: #if NPLCOM > 0 && defined(PLCONSOLE)
816: static struct bus_space plcom_bus_space;
817: #endif
818: #if 0
819: char *console = CONSDEVNAME;
820: #endif
821:
822: if (consinit_called != 0)
823: return;
824:
825: consinit_called = 1;
826:
827: #if NPLCOM > 0 && defined(PLCONSOLE)
828: if (PLCOMCNUNIT == 0) {
829: ifpga_create_io_bs_tag(&plcom_bus_space,
830: (void*)UART0_BOOT_BASE);
831: if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
832: IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT))
833: panic("can't init serial console");
834: return;
835: } else if (PLCOMCNUNIT == 1) {
836: ifpga_create_io_bs_tag(&plcom_bus_space,
837: (void*)UART0_BOOT_BASE);
838: if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
839: IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT))
840: panic("can't init serial console");
841: return;
842: }
843: #endif
844: #if (NCOM > 0)
845: if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
1.41 thorpej 846: COM_FREQ, COM_TYPE_NORMAL, comcnmode))
1.1 rearnsha 847: panic("can't init serial console @%x", CONCOMADDR);
848: return;
849: #endif
850: panic("No serial console configured");
1.23 rearnsha 851: }
852:
853: static void
854: integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize)
855: {
856: volatile unsigned long *cm_sdram
857: = (volatile unsigned long *)0x10000020;
1.46 rearnsha 858: volatile unsigned long *cm_stat
859: = (volatile unsigned long *)0x10000010;
1.23 rearnsha 860:
1.46 rearnsha 861: *memstart = *cm_stat & 0x00ff0000;
1.23 rearnsha 862:
1.46 rearnsha 863: /*
864: * Although the SSRAM overlaps the SDRAM, we can use the wrap-around
865: * to access the entire bank.
866: */
1.23 rearnsha 867: switch ((*cm_sdram >> 2) & 0x7)
868: {
869: case 0:
870: *memsize = 16 * 1024 * 1024;
871: break;
872: case 1:
873: *memsize = 32 * 1024 * 1024;
874: break;
875: case 2:
876: *memsize = 64 * 1024 * 1024;
877: break;
878: case 3:
879: *memsize = 128 * 1024 * 1024;
880: break;
881: case 4:
1.46 rearnsha 882: /* With 256M of memory there is no wrap-around. */
883: *memsize = 256 * 1024 * 1024 - *memstart;
1.23 rearnsha 884: break;
885: default:
886: printf("CM_SDRAM retuns unknown value, using 16M\n");
887: *memsize = 16 * 1024 * 1024;
888: break;
889: }
1.1 rearnsha 890: }
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