3 * Common boot and setup code.
5 * Copyright (C) 2001 PPC64 Team, IBM Corp
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
15 #include <linux/config.h>
16 #include <linux/module.h>
17 #include <linux/string.h>
18 #include <linux/sched.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/reboot.h>
22 #include <linux/delay.h>
23 #include <linux/initrd.h>
24 #include <linux/ide.h>
25 #include <linux/seq_file.h>
26 #include <linux/ioport.h>
27 #include <linux/console.h>
28 #include <linux/version.h>
29 #include <linux/tty.h>
30 #include <linux/root_dev.h>
31 #include <linux/notifier.h>
32 #include <linux/cpu.h>
33 #include <linux/unistd.h>
34 #include <linux/serial.h>
35 #include <linux/serial_8250.h>
38 #include <asm/processor.h>
39 #include <asm/pgtable.h>
40 #include <asm/bootinfo.h>
43 #include <asm/machdep.h>
45 #include <asm/ppcdebug.h>
47 #include <asm/cputable.h>
48 #include <asm/sections.h>
49 #include <asm/btext.h>
50 #include <asm/nvram.h>
51 #include <asm/setup.h>
52 #include <asm/system.h>
54 #include <asm/iommu.h>
55 #include <asm/serial.h>
56 #include <asm/cache.h>
60 #include <asm/iSeries/ItLpNaca.h>
63 #define DBG(fmt...) udbg_printf(fmt)
69 * Here are some early debugging facilities. You can enable one
70 * but your kernel will not boot on anything else if you do so
73 /* This one is for use on LPAR machines that support an HVC console
76 extern void udbg_init_debug_lpar(void);
77 /* This one is for use on Apple G5 machines
79 extern void udbg_init_pmac_realmode(void);
80 /* That's RTAS panel debug */
81 extern void call_rtas_display_status_delay(unsigned char c
);
82 /* Here's maple real mode debug */
83 extern void udbg_init_maple_realmode(void);
85 #define EARLY_DEBUG_INIT() do {} while(0)
88 #define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
89 #define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
90 #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
91 #define EARLY_DEBUG_INIT() \
92 do { ppc_md.udbg_putc = call_rtas_display_status_delay; } while(0)
95 /* extern void *stab; */
96 extern unsigned long klimit
;
98 extern void mm_init_ppc64(void);
99 extern int idle_setup(void);
100 extern void stab_initialize(unsigned long stab
);
101 extern void htab_initialize(void);
102 extern void early_init_devtree(void *flat_dt
);
103 extern void unflatten_device_tree(void);
105 extern void smp_release_cpus(void);
109 int boot_cpuid_phys
= 0;
112 u64 ppc64_debug_switch
;
114 struct ppc64_caches ppc64_caches
;
115 EXPORT_SYMBOL_GPL(ppc64_caches
);
118 * These are used in binfmt_elf.c to put aux entries on the stack
119 * for each elf executable being started.
125 /* The main machine-dep calls structure
127 struct machdep_calls ppc_md
;
128 EXPORT_SYMBOL(ppc_md
);
130 #ifdef CONFIG_MAGIC_SYSRQ
131 unsigned long SYSRQ_KEY
;
132 #endif /* CONFIG_MAGIC_SYSRQ */
135 static int ppc64_panic_event(struct notifier_block
*, unsigned long, void *);
136 static struct notifier_block ppc64_panic_block
= {
137 .notifier_call
= ppc64_panic_event
,
138 .priority
= INT_MIN
/* may not return; must be done last */
142 * Perhaps we can put the pmac screen_info[] here
143 * on pmac as well so we don't need the ifdef's.
144 * Until we get multiple-console support in here
146 * Maybe tie it to serial consoles, since this is really what
147 * these processors use on existing boards. -- Dan
149 struct screen_info screen_info
= {
152 .orig_video_cols
= 80,
153 .orig_video_lines
= 25,
154 .orig_video_isVGA
= 1,
155 .orig_video_points
= 16
159 * Initialize the PPCDBG state. Called before relocation has been enabled.
161 void __init
ppcdbg_initialize(void)
163 ppc64_debug_switch
= PPC_DEBUG_DEFAULT
; /* | PPCDBG_BUSWALK | */
164 /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;
168 * Early boot console based on udbg
170 static struct console udbg_console
= {
172 .write
= udbg_console_write
,
173 .flags
= CON_PRINTBUFFER
,
176 static int early_console_initialized
;
178 void __init
disable_early_printk(void)
180 if (!early_console_initialized
)
182 unregister_console(&udbg_console
);
183 early_console_initialized
= 0;
186 #if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP)
188 static int smt_enabled_cmdline
;
190 /* Look for ibm,smt-enabled OF option */
191 static void check_smt_enabled(void)
193 struct device_node
*dn
;
196 /* Allow the command line to overrule the OF option */
197 if (smt_enabled_cmdline
)
200 dn
= of_find_node_by_path("/options");
203 smt_option
= (char *)get_property(dn
, "ibm,smt-enabled", NULL
);
206 if (!strcmp(smt_option
, "on"))
207 smt_enabled_at_boot
= 1;
208 else if (!strcmp(smt_option
, "off"))
209 smt_enabled_at_boot
= 0;
214 /* Look for smt-enabled= cmdline option */
215 static int __init
early_smt_enabled(char *p
)
217 smt_enabled_cmdline
= 1;
222 if (!strcmp(p
, "on") || !strcmp(p
, "1"))
223 smt_enabled_at_boot
= 1;
224 else if (!strcmp(p
, "off") || !strcmp(p
, "0"))
225 smt_enabled_at_boot
= 0;
229 early_param("smt-enabled", early_smt_enabled
);
232 * setup_cpu_maps - initialize the following cpu maps:
237 * Having the possible map set up early allows us to restrict allocations
238 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
240 * We do not initialize the online map here; cpus set their own bits in
241 * cpu_online_map as they come up.
243 * This function is valid only for Open Firmware systems. finish_device_tree
244 * must be called before using this.
246 * While we're here, we may as well set the "physical" cpu ids in the paca.
248 static void __init
setup_cpu_maps(void)
250 struct device_node
*dn
= NULL
;
256 while ((dn
= of_find_node_by_type(dn
, "cpu")) && cpu
< NR_CPUS
) {
258 int j
, len
= sizeof(u32
), nthreads
;
260 intserv
= (u32
*)get_property(dn
, "ibm,ppc-interrupt-server#s",
263 intserv
= (u32
*)get_property(dn
, "reg", NULL
);
265 nthreads
= len
/ sizeof(u32
);
267 for (j
= 0; j
< nthreads
&& cpu
< NR_CPUS
; j
++) {
268 cpu_set(cpu
, cpu_present_map
);
269 set_hard_smp_processor_id(cpu
, intserv
[j
]);
271 if (intserv
[j
] == boot_cpuid_phys
)
273 cpu_set(cpu
, cpu_possible_map
);
278 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
279 * boot cpu is logical 0.
281 if (boot_cpuid_phys
!= get_hard_smp_processor_id(0)) {
283 tmp
= get_hard_smp_processor_id(0);
284 set_hard_smp_processor_id(0, boot_cpuid_phys
);
285 set_hard_smp_processor_id(swap_cpuid
, tmp
);
289 * On pSeries LPAR, we need to know how many cpus
290 * could possibly be added to this partition.
292 if (systemcfg
->platform
== PLATFORM_PSERIES_LPAR
&&
293 (dn
= of_find_node_by_path("/rtas"))) {
294 int num_addr_cell
, num_size_cell
, maxcpus
;
297 num_addr_cell
= prom_n_addr_cells(dn
);
298 num_size_cell
= prom_n_size_cells(dn
);
300 ireg
= (unsigned int *)
301 get_property(dn
, "ibm,lrdr-capacity", NULL
);
306 maxcpus
= ireg
[num_addr_cell
+ num_size_cell
];
308 /* Double maxcpus for processors which have SMT capability */
309 if (cpu_has_feature(CPU_FTR_SMT
))
312 if (maxcpus
> NR_CPUS
) {
314 "Partition configured for %d cpus, "
315 "operating system maximum is %d.\n",
319 printk(KERN_INFO
"Partition configured for %d cpus.\n",
322 for (cpu
= 0; cpu
< maxcpus
; cpu
++)
323 cpu_set(cpu
, cpu_possible_map
);
329 * Do the sibling map; assume only two threads per processor.
332 cpu_set(cpu
, cpu_sibling_map
[cpu
]);
333 if (cpu_has_feature(CPU_FTR_SMT
))
334 cpu_set(cpu
^ 0x1, cpu_sibling_map
[cpu
]);
337 systemcfg
->processorCount
= num_present_cpus();
339 #endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */
342 #ifdef CONFIG_PPC_MULTIPLATFORM
344 extern struct machdep_calls pSeries_md
;
345 extern struct machdep_calls pmac_md
;
346 extern struct machdep_calls maple_md
;
347 extern struct machdep_calls bpa_md
;
349 /* Ultimately, stuff them in an elf section like initcalls... */
350 static struct machdep_calls __initdata
*machines
[] = {
351 #ifdef CONFIG_PPC_PSERIES
353 #endif /* CONFIG_PPC_PSERIES */
354 #ifdef CONFIG_PPC_PMAC
356 #endif /* CONFIG_PPC_PMAC */
357 #ifdef CONFIG_PPC_MAPLE
359 #endif /* CONFIG_PPC_MAPLE */
360 #ifdef CONFIG_PPC_BPA
367 * Early initialization entry point. This is called by head.S
368 * with MMU translation disabled. We rely on the "feature" of
369 * the CPU that ignores the top 2 bits of the address in real
370 * mode so we can access kernel globals normally provided we
371 * only toy with things in the RMO region. From here, we do
372 * some early parsing of the device-tree to setup out LMB
373 * data structures, and allocate & initialize the hash table
374 * and segment tables so we can start running with translation
377 * It is this function which will call the probe() callback of
378 * the various platform types and copy the matching one to the
379 * global ppc_md structure. Your platform can eventually do
380 * some very early initializations from the probe() routine, but
381 * this is not recommended, be very careful as, for example, the
382 * device-tree is not accessible via normal means at this point.
385 void __init
early_setup(unsigned long dt_ptr
)
387 struct paca_struct
*lpaca
= get_paca();
388 static struct machdep_calls
**mach
;
391 * Enable early debugging if any specified (see top of
396 DBG(" -> early_setup()\n");
399 * Fill the default DBG level (do we want to keep
400 * that old mecanism around forever ?)
405 * Do early initializations using the flattened device
406 * tree, like retreiving the physical memory map or
407 * calculating/retreiving the hash table size
409 early_init_devtree(__va(dt_ptr
));
412 * Iterate all ppc_md structures until we find the proper
413 * one for the current machine type
415 DBG("Probing machine type for platform %x...\n",
416 systemcfg
->platform
);
418 for (mach
= machines
; *mach
; mach
++) {
419 if ((*mach
)->probe(systemcfg
->platform
))
422 /* What can we do if we didn't find ? */
424 DBG("No suitable machine found !\n");
429 /* our udbg callbacks got overriden by the above, let's put them
430 * back in. Ultimately, I want those things to be split from the
435 DBG("Found, Initializing memory management...\n");
438 * Initialize stab / SLB management
440 stab_initialize(lpaca
->stab_real
);
443 * Initialize the MMU Hash table and create the linear mapping
448 DBG(" <- early_setup()\n");
453 * Initialize some remaining members of the ppc64_caches and systemcfg structures
454 * (at least until we get rid of them completely). This is mostly some
455 * cache informations about the CPU that will be used by cache flush
456 * routines and/or provided to userland
458 static void __init
initialize_cache_info(void)
460 struct device_node
*np
;
461 unsigned long num_cpus
= 0;
463 DBG(" -> initialize_cache_info()\n");
465 for (np
= NULL
; (np
= of_find_node_by_type(np
, "cpu"));) {
468 /* We're assuming *all* of the CPUs have the same
469 * d-cache and i-cache sizes... -Peter
472 if ( num_cpus
== 1 ) {
477 /* Then read cache informations */
478 if (systemcfg
->platform
== PLATFORM_POWERMAC
) {
479 dc
= "d-cache-block-size";
480 ic
= "i-cache-block-size";
482 dc
= "d-cache-line-size";
483 ic
= "i-cache-line-size";
487 lsize
= cur_cpu_spec
->dcache_bsize
;
488 sizep
= (u32
*)get_property(np
, "d-cache-size", NULL
);
491 lsizep
= (u32
*) get_property(np
, dc
, NULL
);
494 if (sizep
== 0 || lsizep
== 0)
495 DBG("Argh, can't find dcache properties ! "
496 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
498 systemcfg
->dcache_size
= ppc64_caches
.dsize
= size
;
499 systemcfg
->dcache_line_size
=
500 ppc64_caches
.dline_size
= lsize
;
501 ppc64_caches
.log_dline_size
= __ilog2(lsize
);
502 ppc64_caches
.dlines_per_page
= PAGE_SIZE
/ lsize
;
505 lsize
= cur_cpu_spec
->icache_bsize
;
506 sizep
= (u32
*)get_property(np
, "i-cache-size", NULL
);
509 lsizep
= (u32
*)get_property(np
, ic
, NULL
);
512 if (sizep
== 0 || lsizep
== 0)
513 DBG("Argh, can't find icache properties ! "
514 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
516 systemcfg
->icache_size
= ppc64_caches
.isize
= size
;
517 systemcfg
->icache_line_size
=
518 ppc64_caches
.iline_size
= lsize
;
519 ppc64_caches
.log_iline_size
= __ilog2(lsize
);
520 ppc64_caches
.ilines_per_page
= PAGE_SIZE
/ lsize
;
524 /* Add an eye catcher and the systemcfg layout version number */
525 strcpy(systemcfg
->eye_catcher
, "SYSTEMCFG:PPC64");
526 systemcfg
->version
.major
= SYSTEMCFG_MAJOR
;
527 systemcfg
->version
.minor
= SYSTEMCFG_MINOR
;
528 systemcfg
->processor
= mfspr(SPRN_PVR
);
530 DBG(" <- initialize_cache_info()\n");
533 static void __init
check_for_initrd(void)
535 #ifdef CONFIG_BLK_DEV_INITRD
538 DBG(" -> check_for_initrd()\n");
540 prop
= (u64
*)get_property(of_chosen
, "linux,initrd-start", NULL
);
542 initrd_start
= (unsigned long)__va(*prop
);
543 prop
= (u64
*)get_property(of_chosen
, "linux,initrd-end", NULL
);
545 initrd_end
= (unsigned long)__va(*prop
);
546 initrd_below_start_ok
= 1;
551 /* If we were passed an initrd, set the ROOT_DEV properly if the values
552 * look sensible. If not, clear initrd reference.
554 if (initrd_start
>= KERNELBASE
&& initrd_end
>= KERNELBASE
&&
555 initrd_end
> initrd_start
)
556 ROOT_DEV
= Root_RAM0
;
558 initrd_start
= initrd_end
= 0;
561 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start
, initrd_end
);
563 DBG(" <- check_for_initrd()\n");
564 #endif /* CONFIG_BLK_DEV_INITRD */
567 #endif /* CONFIG_PPC_MULTIPLATFORM */
570 * Do some initial setup of the system. The parameters are those which
571 * were passed in from the bootloader.
573 void __init
setup_system(void)
575 DBG(" -> setup_system()\n");
577 #ifdef CONFIG_PPC_ISERIES
578 /* pSeries systems are identified in prom.c via OF. */
579 if (itLpNaca
.xLparInstalled
== 1)
580 systemcfg
->platform
= PLATFORM_ISERIES_LPAR
;
583 #else /* CONFIG_PPC_ISERIES */
586 * Unflatten the device-tree passed by prom_init or kexec
588 unflatten_device_tree();
591 * Fill the ppc64_caches & systemcfg structures with informations
592 * retreived from the device-tree. Need to be called before
593 * finish_device_tree() since the later requires some of the
594 * informations filled up here to properly parse the interrupt
596 * It also sets up the cache line sizes which allows to call
597 * routines like flush_icache_range (used by the hash init
600 initialize_cache_info();
602 #ifdef CONFIG_PPC_RTAS
604 * Initialize RTAS if available
607 #endif /* CONFIG_PPC_RTAS */
610 * Check if we have an initrd provided via the device-tree
615 * Do some platform specific early initializations, that includes
616 * setting up the hash table pointers. It also sets up some interrupt-mapping
617 * related options that will be used by finish_device_tree()
622 * "Finish" the device-tree, that is do the actual parsing of
623 * some of the properties like the interrupt map
625 finish_device_tree();
630 #ifdef CONFIG_XMON_DEFAULT
634 * Register early console
636 early_console_initialized
= 1;
637 register_console(&udbg_console
);
639 /* Save unparsed command line copy for /proc/cmdline */
640 strlcpy(saved_command_line
, cmd_line
, COMMAND_LINE_SIZE
);
643 #endif /* !CONFIG_PPC_ISERIES */
645 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES)
647 * iSeries has already initialized the cpu maps at this point.
651 /* Release secondary cpus out of their spinloops at 0x60 now that
652 * we can map physical -> logical CPU ids
655 #endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */
657 printk("Starting Linux PPC64 %s\n", UTS_RELEASE
);
659 printk("-----------------------------------------------------\n");
660 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size
);
661 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch
);
662 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller
);
663 printk("systemcfg = 0x%p\n", systemcfg
);
664 printk("systemcfg->platform = 0x%x\n", systemcfg
->platform
);
665 printk("systemcfg->processorCount = 0x%lx\n", systemcfg
->processorCount
);
666 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg
->physicalMemorySize
);
667 printk("ppc64_caches.dcache_line_size = 0x%x\n",
668 ppc64_caches
.dline_size
);
669 printk("ppc64_caches.icache_line_size = 0x%x\n",
670 ppc64_caches
.iline_size
);
671 printk("htab_address = 0x%p\n", htab_address
);
672 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask
);
673 printk("-----------------------------------------------------\n");
677 DBG(" <- setup_system()\n");
680 /* also used by kexec */
681 void machine_shutdown(void)
683 if (ppc_md
.nvram_sync
)
687 void machine_restart(char *cmd
)
694 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
698 EXPORT_SYMBOL(machine_restart
);
700 void machine_power_off(void)
707 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
711 EXPORT_SYMBOL(machine_power_off
);
713 void machine_halt(void)
720 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
724 EXPORT_SYMBOL(machine_halt
);
726 static int ppc64_panic_event(struct notifier_block
*this,
727 unsigned long event
, void *ptr
)
729 ppc_md
.panic((char *)ptr
); /* May not return */
735 DEFINE_PER_CPU(unsigned int, pvr
);
738 static int show_cpuinfo(struct seq_file
*m
, void *v
)
740 unsigned long cpu_id
= (unsigned long)v
- 1;
745 if (cpu_id
== NR_CPUS
) {
746 seq_printf(m
, "timebase\t: %lu\n", ppc_tb_freq
);
748 if (ppc_md
.get_cpuinfo
!= NULL
)
749 ppc_md
.get_cpuinfo(m
);
754 /* We only show online cpus: disable preempt (overzealous, I
755 * knew) to prevent cpu going down. */
757 if (!cpu_online(cpu_id
)) {
763 pvr
= per_cpu(pvr
, cpu_id
);
765 pvr
= mfspr(SPRN_PVR
);
767 maj
= (pvr
>> 8) & 0xFF;
770 seq_printf(m
, "processor\t: %lu\n", cpu_id
);
771 seq_printf(m
, "cpu\t\t: ");
773 if (cur_cpu_spec
->pvr_mask
)
774 seq_printf(m
, "%s", cur_cpu_spec
->cpu_name
);
776 seq_printf(m
, "unknown (%08x)", pvr
);
778 #ifdef CONFIG_ALTIVEC
779 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
780 seq_printf(m
, ", altivec supported");
781 #endif /* CONFIG_ALTIVEC */
786 * Assume here that all clock rates are the same in a
787 * smp system. -- Cort
789 seq_printf(m
, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq
/ 1000000,
790 ppc_proc_freq
% 1000000);
792 seq_printf(m
, "revision\t: %hd.%hd\n\n", maj
, min
);
798 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
800 return *pos
<= NR_CPUS
? (void *)((*pos
)+1) : NULL
;
802 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
805 return c_start(m
, pos
);
807 static void c_stop(struct seq_file
*m
, void *v
)
810 struct seq_operations cpuinfo_op
= {
814 .show
= show_cpuinfo
,
818 * These three variables are used to save values passed to us by prom_init()
819 * via the device tree. The TCE variables are needed because with a memory_limit
820 * in force we may need to explicitly map the TCE are at the top of RAM.
822 unsigned long memory_limit
;
823 unsigned long tce_alloc_start
;
824 unsigned long tce_alloc_end
;
826 #ifdef CONFIG_PPC_ISERIES
828 * On iSeries we just parse the mem=X option from the command line.
829 * On pSeries it's a bit more complicated, see prom_init_mem()
831 static int __init
early_parsemem(char *p
)
836 memory_limit
= ALIGN(memparse(p
, &p
), PAGE_SIZE
);
840 early_param("mem", early_parsemem
);
841 #endif /* CONFIG_PPC_ISERIES */
843 #ifdef CONFIG_PPC_MULTIPLATFORM
844 static int __init
set_preferred_console(void)
846 struct device_node
*prom_stdout
= NULL
;
851 DBG(" -> set_preferred_console()\n");
853 /* The user has requested a console so this is already set up. */
854 if (strstr(saved_command_line
, "console=")) {
855 DBG(" console was specified !\n");
860 DBG(" of_chosen is NULL !\n");
863 /* We are getting a weird phandle from OF ... */
864 /* ... So use the full path instead */
865 name
= (char *)get_property(of_chosen
, "linux,stdout-path", NULL
);
867 DBG(" no linux,stdout-path !\n");
870 prom_stdout
= of_find_node_by_path(name
);
872 DBG(" can't find stdout package %s !\n", name
);
875 DBG("stdout is %s\n", prom_stdout
->full_name
);
877 name
= (char *)get_property(prom_stdout
, "name", NULL
);
879 DBG(" stdout package has no name !\n");
882 spd
= (u32
*)get_property(prom_stdout
, "current-speed", NULL
);
886 #ifdef CONFIG_SERIAL_8250_CONSOLE
887 else if (strcmp(name
, "serial") == 0) {
889 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", &i
);
905 /* We dont recognise the serial port */
910 #endif /* CONFIG_SERIAL_8250_CONSOLE */
911 #ifdef CONFIG_PPC_PSERIES
912 else if (strcmp(name
, "vty") == 0) {
913 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", NULL
);
914 char *compat
= (char *)get_property(prom_stdout
, "compatible", NULL
);
916 if (reg
&& compat
&& (strcmp(compat
, "hvterm-protocol") == 0)) {
917 /* Host Virtual Serial Interface */
929 of_node_put(prom_stdout
);
930 DBG("Found hvsi console at offset %d\n", offset
);
931 return add_preferred_console("hvsi", offset
, NULL
);
933 /* pSeries LPAR virtual console */
934 of_node_put(prom_stdout
);
935 DBG("Found hvc console\n");
936 return add_preferred_console("hvc", 0, NULL
);
939 #endif /* CONFIG_PPC_PSERIES */
940 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
941 else if (strcmp(name
, "ch-a") == 0)
943 else if (strcmp(name
, "ch-b") == 0)
945 #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
948 of_node_put(prom_stdout
);
950 DBG("Found serial console at ttyS%d\n", offset
);
953 static char __initdata opt
[16];
954 sprintf(opt
, "%d", *spd
);
955 return add_preferred_console("ttyS", offset
, opt
);
957 return add_preferred_console("ttyS", offset
, NULL
);
960 DBG("No preferred console found !\n");
961 of_node_put(prom_stdout
);
964 console_initcall(set_preferred_console
);
965 #endif /* CONFIG_PPC_MULTIPLATFORM */
967 #ifdef CONFIG_IRQSTACKS
968 static void __init
irqstack_early_init(void)
973 * interrupt stacks must be under 256MB, we cannot afford to take
974 * SLB misses on them.
977 softirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
978 THREAD_SIZE
, 0x10000000));
979 hardirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
980 THREAD_SIZE
, 0x10000000));
984 #define irqstack_early_init()
988 * Stack space used when we detect a bad kernel stack pointer, and
989 * early in SMP boots before relocation is enabled.
991 static void __init
emergency_stack_init(void)
997 * Emergency stacks must be under 256MB, we cannot afford to take
998 * SLB misses on them. The ABI also requires them to be 128-byte
1001 * Since we use these as temporary stacks during secondary CPU
1002 * bringup, we need to get at them in real mode. This means they
1003 * must also be within the RMO region.
1005 limit
= min(0x10000000UL
, lmb
.rmo_size
);
1008 paca
[i
].emergency_sp
= __va(lmb_alloc_base(PAGE_SIZE
, 128,
1009 limit
)) + PAGE_SIZE
;
1013 * Called from setup_arch to initialize the bitmap of available
1014 * syscalls in the systemcfg page
1016 void __init
setup_syscall_map(void)
1018 unsigned int i
, count64
= 0, count32
= 0;
1019 extern unsigned long *sys_call_table
;
1020 extern unsigned long *sys_call_table32
;
1021 extern unsigned long sys_ni_syscall
;
1024 for (i
= 0; i
< __NR_syscalls
; i
++) {
1025 if (sys_call_table
[i
] == sys_ni_syscall
)
1028 systemcfg
->syscall_map_64
[i
>> 5] |= 0x80000000UL
>> (i
& 0x1f);
1030 for (i
= 0; i
< __NR_syscalls
; i
++) {
1031 if (sys_call_table32
[i
] == sys_ni_syscall
)
1034 systemcfg
->syscall_map_32
[i
>> 5] |= 0x80000000UL
>> (i
& 0x1f);
1036 printk(KERN_INFO
"Syscall map setup, %d 32 bits and %d 64 bits syscalls\n",
1041 * Called into from start_kernel, after lock_kernel has been called.
1042 * Initializes bootmem, which is unsed to manage page allocation until
1043 * mem_init is called.
1045 void __init
setup_arch(char **cmdline_p
)
1047 extern void do_init_bootmem(void);
1049 ppc64_boot_msg(0x12, "Setup Arch");
1051 *cmdline_p
= cmd_line
;
1054 * Set cache line size based on type of cpu as a default.
1055 * Systems with OF can look in the properties on the cpu node(s)
1056 * for a possibly more accurate value.
1058 dcache_bsize
= ppc64_caches
.dline_size
;
1059 icache_bsize
= ppc64_caches
.iline_size
;
1061 /* reboot on panic */
1062 panic_timeout
= 180;
1065 notifier_chain_register(&panic_notifier_list
, &ppc64_panic_block
);
1067 init_mm
.start_code
= PAGE_OFFSET
;
1068 init_mm
.end_code
= (unsigned long) _etext
;
1069 init_mm
.end_data
= (unsigned long) _edata
;
1070 init_mm
.brk
= klimit
;
1072 irqstack_early_init();
1073 emergency_stack_init();
1075 /* set up the bootmem stuff with available memory */
1079 /* initialize the syscall map in systemcfg */
1080 setup_syscall_map();
1082 ppc_md
.setup_arch();
1084 /* Select the correct idle loop for the platform. */
1088 ppc64_boot_msg(0x15, "Setup Done");
1092 /* ToDo: do something useful if ppc_md is not yet setup. */
1093 #define PPC64_LINUX_FUNCTION 0x0f000000
1094 #define PPC64_IPL_MESSAGE 0xc0000000
1095 #define PPC64_TERM_MESSAGE 0xb0000000
1096 #define PPC64_ATTN_MESSAGE 0xa0000000
1097 #define PPC64_DUMP_MESSAGE 0xd0000000
1099 static void ppc64_do_msg(unsigned int src
, const char *msg
)
1101 if (ppc_md
.progress
) {
1104 sprintf(buf
, "%08X\n", src
);
1105 ppc_md
.progress(buf
, 0);
1106 snprintf(buf
, 128, "%s", msg
);
1107 ppc_md
.progress(buf
, 0);
1111 /* Print a boot progress message. */
1112 void ppc64_boot_msg(unsigned int src
, const char *msg
)
1114 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_IPL_MESSAGE
|src
, msg
);
1115 printk("[boot]%04x %s\n", src
, msg
);
1118 /* Print a termination message (print only -- does not stop the kernel) */
1119 void ppc64_terminate_msg(unsigned int src
, const char *msg
)
1121 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_TERM_MESSAGE
|src
, msg
);
1122 printk("[terminate]%04x %s\n", src
, msg
);
1125 /* Print something that needs attention (device error, etc) */
1126 void ppc64_attention_msg(unsigned int src
, const char *msg
)
1128 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_ATTN_MESSAGE
|src
, msg
);
1129 printk("[attention]%04x %s\n", src
, msg
);
1132 /* Print a dump progress message. */
1133 void ppc64_dump_msg(unsigned int src
, const char *msg
)
1135 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_DUMP_MESSAGE
|src
, msg
);
1136 printk("[dump]%04x %s\n", src
, msg
);
1139 /* This should only be called on processor 0 during calibrate decr */
1140 void __init
setup_default_decr(void)
1142 struct paca_struct
*lpaca
= get_paca();
1144 lpaca
->default_decr
= tb_ticks_per_jiffy
;
1145 lpaca
->next_jiffy_update_tb
= get_tb() + tb_ticks_per_jiffy
;
1148 #ifndef CONFIG_PPC_ISERIES
1150 * This function can be used by platforms to "find" legacy serial ports.
1151 * It works for "serial" nodes under an "isa" node, and will try to
1152 * respect the "ibm,aix-loc" property if any. It works with up to 8
1156 #define MAX_LEGACY_SERIAL_PORTS 8
1157 static struct plat_serial8250_port serial_ports
[MAX_LEGACY_SERIAL_PORTS
+1];
1158 static unsigned int old_serial_count
;
1160 void __init
generic_find_legacy_serial_ports(u64
*physport
,
1161 unsigned int *default_speed
)
1163 struct device_node
*np
;
1166 struct isa_reg_property
{
1171 struct pci_reg_property
{
1172 struct pci_address addr
;
1177 DBG(" -> generic_find_legacy_serial_port()\n");
1183 np
= of_find_node_by_path("/");
1187 /* First fill our array */
1188 for (np
= NULL
; (np
= of_find_node_by_type(np
, "serial"));) {
1189 struct device_node
*isa
, *pci
;
1190 struct isa_reg_property
*reg
;
1191 unsigned long phys_size
, addr_size
, io_base
;
1193 u32
*interrupts
, *clk
, *spd
;
1195 int index
, rlen
, rentsize
;
1197 /* Ok, first check if it's under an "isa" parent */
1198 isa
= of_get_parent(np
);
1199 if (!isa
|| strcmp(isa
->name
, "isa")) {
1200 DBG("%s: no isa parent found\n", np
->full_name
);
1204 /* Now look for an "ibm,aix-loc" property that gives us ordering
1207 typep
= (char *)get_property(np
, "ibm,aix-loc", NULL
);
1209 /* Get the ISA port number */
1210 reg
= (struct isa_reg_property
*)get_property(np
, "reg", NULL
);
1213 /* We assume the interrupt number isn't translated ... */
1214 interrupts
= (u32
*)get_property(np
, "interrupts", NULL
);
1215 /* get clock freq. if present */
1216 clk
= (u32
*)get_property(np
, "clock-frequency", NULL
);
1217 /* get default speed if present */
1218 spd
= (u32
*)get_property(np
, "current-speed", NULL
);
1219 /* Default to locate at end of array */
1220 index
= old_serial_count
; /* end of the array by default */
1222 /* If we have a location index, then use it */
1223 if (typep
&& *typep
== 'S') {
1224 index
= simple_strtol(typep
+1, NULL
, 0) - 1;
1225 /* if index is out of range, use end of array instead */
1226 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1227 index
= old_serial_count
;
1228 /* if our index is still out of range, that mean that
1229 * array is full, we could scan for a free slot but that
1230 * make little sense to bother, just skip the port
1232 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1234 if (index
>= old_serial_count
)
1235 old_serial_count
= index
+ 1;
1236 /* Check if there is a port who already claimed our slot */
1237 if (serial_ports
[index
].iobase
!= 0) {
1238 /* if we still have some room, move it, else override */
1239 if (old_serial_count
< MAX_LEGACY_SERIAL_PORTS
) {
1240 DBG("Moved legacy port %d -> %d\n", index
,
1242 serial_ports
[old_serial_count
++] =
1243 serial_ports
[index
];
1245 DBG("Replacing legacy port %d\n", index
);
1249 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1251 if (index
>= old_serial_count
)
1252 old_serial_count
= index
+ 1;
1254 /* Now fill the entry */
1255 memset(&serial_ports
[index
], 0, sizeof(struct plat_serial8250_port
));
1256 serial_ports
[index
].uartclk
= clk
? *clk
: BASE_BAUD
* 16;
1257 serial_ports
[index
].iobase
= reg
->address
;
1258 serial_ports
[index
].irq
= interrupts
? interrupts
[0] : 0;
1259 serial_ports
[index
].flags
= ASYNC_BOOT_AUTOCONF
;
1261 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1263 serial_ports
[index
].iobase
,
1264 serial_ports
[index
].irq
,
1265 serial_ports
[index
].uartclk
);
1267 /* Get phys address of IO reg for port 1 */
1271 pci
= of_get_parent(isa
);
1273 DBG("%s: no pci parent found\n", np
->full_name
);
1277 rangesp
= (u32
*)get_property(pci
, "ranges", &rlen
);
1278 if (rangesp
== NULL
) {
1284 /* we need the #size-cells of the PCI bridge node itself */
1286 sizeprop
= (u32
*)get_property(pci
, "#size-cells", NULL
);
1287 if (sizeprop
!= NULL
)
1288 phys_size
= *sizeprop
;
1289 /* we need the parent #addr-cells */
1290 addr_size
= prom_n_addr_cells(pci
);
1291 rentsize
= 3 + addr_size
+ phys_size
;
1293 for (;rlen
>= rentsize
; rlen
-= rentsize
,rangesp
+= rentsize
) {
1294 if (((rangesp
[0] >> 24) & 0x3) != 1)
1295 continue; /* not IO space */
1296 io_base
= rangesp
[3];
1298 io_base
= (io_base
<< 32) | rangesp
[4];
1301 *physport
= io_base
+ reg
->address
;
1302 if (default_speed
&& spd
)
1303 *default_speed
= *spd
;
1310 DBG(" <- generic_find_legacy_serial_port()\n");
1313 static struct platform_device serial_device
= {
1314 .name
= "serial8250",
1317 .platform_data
= serial_ports
,
1321 static int __init
serial_dev_init(void)
1323 return platform_device_register(&serial_device
);
1325 arch_initcall(serial_dev_init
);
1327 #endif /* CONFIG_PPC_ISERIES */
1329 int check_legacy_ioport(unsigned long base_port
)
1331 if (ppc_md
.check_legacy_ioport
== NULL
)
1333 return ppc_md
.check_legacy_ioport(base_port
);
1335 EXPORT_SYMBOL(check_legacy_ioport
);
1338 static int __init
early_xmon(char *p
)
1340 /* ensure xmon is enabled */
1342 if (strncmp(p
, "on", 2) == 0)
1344 if (strncmp(p
, "early", 5) != 0)
1352 early_param("xmon", early_xmon
);