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 void stab_initialize(unsigned long stab
);
100 extern void htab_initialize(void);
101 extern void early_init_devtree(void *flat_dt
);
102 extern void unflatten_device_tree(void);
104 extern void smp_release_cpus(void);
108 int boot_cpuid_phys
= 0;
111 u64 ppc64_debug_switch
;
113 struct ppc64_caches ppc64_caches
;
114 EXPORT_SYMBOL_GPL(ppc64_caches
);
117 * These are used in binfmt_elf.c to put aux entries on the stack
118 * for each elf executable being started.
124 /* The main machine-dep calls structure
126 struct machdep_calls ppc_md
;
127 EXPORT_SYMBOL(ppc_md
);
129 #ifdef CONFIG_MAGIC_SYSRQ
130 unsigned long SYSRQ_KEY
;
131 #endif /* CONFIG_MAGIC_SYSRQ */
134 static int ppc64_panic_event(struct notifier_block
*, unsigned long, void *);
135 static struct notifier_block ppc64_panic_block
= {
136 .notifier_call
= ppc64_panic_event
,
137 .priority
= INT_MIN
/* may not return; must be done last */
141 * Perhaps we can put the pmac screen_info[] here
142 * on pmac as well so we don't need the ifdef's.
143 * Until we get multiple-console support in here
145 * Maybe tie it to serial consoles, since this is really what
146 * these processors use on existing boards. -- Dan
148 struct screen_info screen_info
= {
151 .orig_video_cols
= 80,
152 .orig_video_lines
= 25,
153 .orig_video_isVGA
= 1,
154 .orig_video_points
= 16
158 * Initialize the PPCDBG state. Called before relocation has been enabled.
160 void __init
ppcdbg_initialize(void)
162 ppc64_debug_switch
= PPC_DEBUG_DEFAULT
; /* | PPCDBG_BUSWALK | */
163 /* PPCDBG_PHBINIT | PPCDBG_MM | PPCDBG_MMINIT | PPCDBG_TCEINIT | PPCDBG_TCE */;
167 * Early boot console based on udbg
169 static struct console udbg_console
= {
171 .write
= udbg_console_write
,
172 .flags
= CON_PRINTBUFFER
,
175 static int early_console_initialized
;
177 void __init
disable_early_printk(void)
179 if (!early_console_initialized
)
181 unregister_console(&udbg_console
);
182 early_console_initialized
= 0;
185 #if defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP)
187 static int smt_enabled_cmdline
;
189 /* Look for ibm,smt-enabled OF option */
190 static void check_smt_enabled(void)
192 struct device_node
*dn
;
195 /* Allow the command line to overrule the OF option */
196 if (smt_enabled_cmdline
)
199 dn
= of_find_node_by_path("/options");
202 smt_option
= (char *)get_property(dn
, "ibm,smt-enabled", NULL
);
205 if (!strcmp(smt_option
, "on"))
206 smt_enabled_at_boot
= 1;
207 else if (!strcmp(smt_option
, "off"))
208 smt_enabled_at_boot
= 0;
213 /* Look for smt-enabled= cmdline option */
214 static int __init
early_smt_enabled(char *p
)
216 smt_enabled_cmdline
= 1;
221 if (!strcmp(p
, "on") || !strcmp(p
, "1"))
222 smt_enabled_at_boot
= 1;
223 else if (!strcmp(p
, "off") || !strcmp(p
, "0"))
224 smt_enabled_at_boot
= 0;
228 early_param("smt-enabled", early_smt_enabled
);
231 * setup_cpu_maps - initialize the following cpu maps:
236 * Having the possible map set up early allows us to restrict allocations
237 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
239 * We do not initialize the online map here; cpus set their own bits in
240 * cpu_online_map as they come up.
242 * This function is valid only for Open Firmware systems. finish_device_tree
243 * must be called before using this.
245 * While we're here, we may as well set the "physical" cpu ids in the paca.
247 static void __init
setup_cpu_maps(void)
249 struct device_node
*dn
= NULL
;
255 while ((dn
= of_find_node_by_type(dn
, "cpu")) && cpu
< NR_CPUS
) {
257 int j
, len
= sizeof(u32
), nthreads
;
259 intserv
= (u32
*)get_property(dn
, "ibm,ppc-interrupt-server#s",
262 intserv
= (u32
*)get_property(dn
, "reg", NULL
);
264 nthreads
= len
/ sizeof(u32
);
266 for (j
= 0; j
< nthreads
&& cpu
< NR_CPUS
; j
++) {
267 cpu_set(cpu
, cpu_present_map
);
268 set_hard_smp_processor_id(cpu
, intserv
[j
]);
270 if (intserv
[j
] == boot_cpuid_phys
)
272 cpu_set(cpu
, cpu_possible_map
);
277 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
278 * boot cpu is logical 0.
280 if (boot_cpuid_phys
!= get_hard_smp_processor_id(0)) {
282 tmp
= get_hard_smp_processor_id(0);
283 set_hard_smp_processor_id(0, boot_cpuid_phys
);
284 set_hard_smp_processor_id(swap_cpuid
, tmp
);
288 * On pSeries LPAR, we need to know how many cpus
289 * could possibly be added to this partition.
291 if (systemcfg
->platform
== PLATFORM_PSERIES_LPAR
&&
292 (dn
= of_find_node_by_path("/rtas"))) {
293 int num_addr_cell
, num_size_cell
, maxcpus
;
296 num_addr_cell
= prom_n_addr_cells(dn
);
297 num_size_cell
= prom_n_size_cells(dn
);
299 ireg
= (unsigned int *)
300 get_property(dn
, "ibm,lrdr-capacity", NULL
);
305 maxcpus
= ireg
[num_addr_cell
+ num_size_cell
];
307 /* Double maxcpus for processors which have SMT capability */
308 if (cpu_has_feature(CPU_FTR_SMT
))
311 if (maxcpus
> NR_CPUS
) {
313 "Partition configured for %d cpus, "
314 "operating system maximum is %d.\n",
318 printk(KERN_INFO
"Partition configured for %d cpus.\n",
321 for (cpu
= 0; cpu
< maxcpus
; cpu
++)
322 cpu_set(cpu
, cpu_possible_map
);
328 * Do the sibling map; assume only two threads per processor.
331 cpu_set(cpu
, cpu_sibling_map
[cpu
]);
332 if (cpu_has_feature(CPU_FTR_SMT
))
333 cpu_set(cpu
^ 0x1, cpu_sibling_map
[cpu
]);
336 systemcfg
->processorCount
= num_present_cpus();
338 #endif /* defined(CONFIG_PPC_MULTIPLATFORM) && defined(CONFIG_SMP) */
341 #ifdef CONFIG_PPC_MULTIPLATFORM
343 extern struct machdep_calls pSeries_md
;
344 extern struct machdep_calls pmac_md
;
345 extern struct machdep_calls maple_md
;
346 extern struct machdep_calls bpa_md
;
348 /* Ultimately, stuff them in an elf section like initcalls... */
349 static struct machdep_calls __initdata
*machines
[] = {
350 #ifdef CONFIG_PPC_PSERIES
352 #endif /* CONFIG_PPC_PSERIES */
353 #ifdef CONFIG_PPC_PMAC
355 #endif /* CONFIG_PPC_PMAC */
356 #ifdef CONFIG_PPC_MAPLE
358 #endif /* CONFIG_PPC_MAPLE */
359 #ifdef CONFIG_PPC_BPA
366 * Early initialization entry point. This is called by head.S
367 * with MMU translation disabled. We rely on the "feature" of
368 * the CPU that ignores the top 2 bits of the address in real
369 * mode so we can access kernel globals normally provided we
370 * only toy with things in the RMO region. From here, we do
371 * some early parsing of the device-tree to setup out LMB
372 * data structures, and allocate & initialize the hash table
373 * and segment tables so we can start running with translation
376 * It is this function which will call the probe() callback of
377 * the various platform types and copy the matching one to the
378 * global ppc_md structure. Your platform can eventually do
379 * some very early initializations from the probe() routine, but
380 * this is not recommended, be very careful as, for example, the
381 * device-tree is not accessible via normal means at this point.
384 void __init
early_setup(unsigned long dt_ptr
)
386 struct paca_struct
*lpaca
= get_paca();
387 static struct machdep_calls
**mach
;
390 * Enable early debugging if any specified (see top of
395 DBG(" -> early_setup()\n");
398 * Fill the default DBG level (do we want to keep
399 * that old mecanism around forever ?)
404 * Do early initializations using the flattened device
405 * tree, like retreiving the physical memory map or
406 * calculating/retreiving the hash table size
408 early_init_devtree(__va(dt_ptr
));
411 * Iterate all ppc_md structures until we find the proper
412 * one for the current machine type
414 DBG("Probing machine type for platform %x...\n",
415 systemcfg
->platform
);
417 for (mach
= machines
; *mach
; mach
++) {
418 if ((*mach
)->probe(systemcfg
->platform
))
421 /* What can we do if we didn't find ? */
423 DBG("No suitable machine found !\n");
428 /* our udbg callbacks got overriden by the above, let's put them
429 * back in. Ultimately, I want those things to be split from the
434 DBG("Found, Initializing memory management...\n");
437 * Initialize stab / SLB management
439 stab_initialize(lpaca
->stab_real
);
442 * Initialize the MMU Hash table and create the linear mapping
447 DBG(" <- early_setup()\n");
452 * Initialize some remaining members of the ppc64_caches and systemcfg structures
453 * (at least until we get rid of them completely). This is mostly some
454 * cache informations about the CPU that will be used by cache flush
455 * routines and/or provided to userland
457 static void __init
initialize_cache_info(void)
459 struct device_node
*np
;
460 unsigned long num_cpus
= 0;
462 DBG(" -> initialize_cache_info()\n");
464 for (np
= NULL
; (np
= of_find_node_by_type(np
, "cpu"));) {
467 /* We're assuming *all* of the CPUs have the same
468 * d-cache and i-cache sizes... -Peter
471 if ( num_cpus
== 1 ) {
476 /* Then read cache informations */
477 if (systemcfg
->platform
== PLATFORM_POWERMAC
) {
478 dc
= "d-cache-block-size";
479 ic
= "i-cache-block-size";
481 dc
= "d-cache-line-size";
482 ic
= "i-cache-line-size";
486 lsize
= cur_cpu_spec
->dcache_bsize
;
487 sizep
= (u32
*)get_property(np
, "d-cache-size", NULL
);
490 lsizep
= (u32
*) get_property(np
, dc
, NULL
);
493 if (sizep
== 0 || lsizep
== 0)
494 DBG("Argh, can't find dcache properties ! "
495 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
497 systemcfg
->dcache_size
= ppc64_caches
.dsize
= size
;
498 systemcfg
->dcache_line_size
=
499 ppc64_caches
.dline_size
= lsize
;
500 ppc64_caches
.log_dline_size
= __ilog2(lsize
);
501 ppc64_caches
.dlines_per_page
= PAGE_SIZE
/ lsize
;
504 lsize
= cur_cpu_spec
->icache_bsize
;
505 sizep
= (u32
*)get_property(np
, "i-cache-size", NULL
);
508 lsizep
= (u32
*)get_property(np
, ic
, NULL
);
511 if (sizep
== 0 || lsizep
== 0)
512 DBG("Argh, can't find icache properties ! "
513 "sizep: %p, lsizep: %p\n", sizep
, lsizep
);
515 systemcfg
->icache_size
= ppc64_caches
.isize
= size
;
516 systemcfg
->icache_line_size
=
517 ppc64_caches
.iline_size
= lsize
;
518 ppc64_caches
.log_iline_size
= __ilog2(lsize
);
519 ppc64_caches
.ilines_per_page
= PAGE_SIZE
/ lsize
;
523 /* Add an eye catcher and the systemcfg layout version number */
524 strcpy(systemcfg
->eye_catcher
, "SYSTEMCFG:PPC64");
525 systemcfg
->version
.major
= SYSTEMCFG_MAJOR
;
526 systemcfg
->version
.minor
= SYSTEMCFG_MINOR
;
527 systemcfg
->processor
= mfspr(SPRN_PVR
);
529 DBG(" <- initialize_cache_info()\n");
532 static void __init
check_for_initrd(void)
534 #ifdef CONFIG_BLK_DEV_INITRD
537 DBG(" -> check_for_initrd()\n");
539 prop
= (u64
*)get_property(of_chosen
, "linux,initrd-start", NULL
);
541 initrd_start
= (unsigned long)__va(*prop
);
542 prop
= (u64
*)get_property(of_chosen
, "linux,initrd-end", NULL
);
544 initrd_end
= (unsigned long)__va(*prop
);
545 initrd_below_start_ok
= 1;
550 /* If we were passed an initrd, set the ROOT_DEV properly if the values
551 * look sensible. If not, clear initrd reference.
553 if (initrd_start
>= KERNELBASE
&& initrd_end
>= KERNELBASE
&&
554 initrd_end
> initrd_start
)
555 ROOT_DEV
= Root_RAM0
;
557 initrd_start
= initrd_end
= 0;
560 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start
, initrd_end
);
562 DBG(" <- check_for_initrd()\n");
563 #endif /* CONFIG_BLK_DEV_INITRD */
566 #endif /* CONFIG_PPC_MULTIPLATFORM */
569 * Do some initial setup of the system. The parameters are those which
570 * were passed in from the bootloader.
572 void __init
setup_system(void)
574 DBG(" -> setup_system()\n");
576 #ifdef CONFIG_PPC_ISERIES
577 /* pSeries systems are identified in prom.c via OF. */
578 if (itLpNaca
.xLparInstalled
== 1)
579 systemcfg
->platform
= PLATFORM_ISERIES_LPAR
;
582 #else /* CONFIG_PPC_ISERIES */
585 * Unflatten the device-tree passed by prom_init or kexec
587 unflatten_device_tree();
590 * Fill the ppc64_caches & systemcfg structures with informations
591 * retreived from the device-tree. Need to be called before
592 * finish_device_tree() since the later requires some of the
593 * informations filled up here to properly parse the interrupt
595 * It also sets up the cache line sizes which allows to call
596 * routines like flush_icache_range (used by the hash init
599 initialize_cache_info();
601 #ifdef CONFIG_PPC_RTAS
603 * Initialize RTAS if available
606 #endif /* CONFIG_PPC_RTAS */
609 * Check if we have an initrd provided via the device-tree
614 * Do some platform specific early initializations, that includes
615 * setting up the hash table pointers. It also sets up some interrupt-mapping
616 * related options that will be used by finish_device_tree()
621 * "Finish" the device-tree, that is do the actual parsing of
622 * some of the properties like the interrupt map
624 finish_device_tree();
629 #ifdef CONFIG_XMON_DEFAULT
633 * Register early console
635 early_console_initialized
= 1;
636 register_console(&udbg_console
);
638 /* Save unparsed command line copy for /proc/cmdline */
639 strlcpy(saved_command_line
, cmd_line
, COMMAND_LINE_SIZE
);
642 #endif /* !CONFIG_PPC_ISERIES */
644 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES)
646 * iSeries has already initialized the cpu maps at this point.
650 /* Release secondary cpus out of their spinloops at 0x60 now that
651 * we can map physical -> logical CPU ids
654 #endif /* defined(CONFIG_SMP) && !defined(CONFIG_PPC_ISERIES) */
656 printk("Starting Linux PPC64 %s\n", UTS_RELEASE
);
658 printk("-----------------------------------------------------\n");
659 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size
);
660 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch
);
661 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller
);
662 printk("systemcfg = 0x%p\n", systemcfg
);
663 printk("systemcfg->platform = 0x%x\n", systemcfg
->platform
);
664 printk("systemcfg->processorCount = 0x%lx\n", systemcfg
->processorCount
);
665 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg
->physicalMemorySize
);
666 printk("ppc64_caches.dcache_line_size = 0x%x\n",
667 ppc64_caches
.dline_size
);
668 printk("ppc64_caches.icache_line_size = 0x%x\n",
669 ppc64_caches
.iline_size
);
670 printk("htab_address = 0x%p\n", htab_address
);
671 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask
);
672 printk("-----------------------------------------------------\n");
676 DBG(" <- setup_system()\n");
679 /* also used by kexec */
680 void machine_shutdown(void)
682 if (ppc_md
.nvram_sync
)
686 void machine_restart(char *cmd
)
693 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
697 EXPORT_SYMBOL(machine_restart
);
699 void machine_power_off(void)
706 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
710 EXPORT_SYMBOL(machine_power_off
);
712 void machine_halt(void)
719 printk(KERN_EMERG
"System Halted, OK to turn off power\n");
723 EXPORT_SYMBOL(machine_halt
);
725 static int ppc64_panic_event(struct notifier_block
*this,
726 unsigned long event
, void *ptr
)
728 ppc_md
.panic((char *)ptr
); /* May not return */
734 DEFINE_PER_CPU(unsigned int, pvr
);
737 static int show_cpuinfo(struct seq_file
*m
, void *v
)
739 unsigned long cpu_id
= (unsigned long)v
- 1;
744 if (cpu_id
== NR_CPUS
) {
745 seq_printf(m
, "timebase\t: %lu\n", ppc_tb_freq
);
747 if (ppc_md
.get_cpuinfo
!= NULL
)
748 ppc_md
.get_cpuinfo(m
);
753 /* We only show online cpus: disable preempt (overzealous, I
754 * knew) to prevent cpu going down. */
756 if (!cpu_online(cpu_id
)) {
762 pvr
= per_cpu(pvr
, cpu_id
);
764 pvr
= mfspr(SPRN_PVR
);
766 maj
= (pvr
>> 8) & 0xFF;
769 seq_printf(m
, "processor\t: %lu\n", cpu_id
);
770 seq_printf(m
, "cpu\t\t: ");
772 if (cur_cpu_spec
->pvr_mask
)
773 seq_printf(m
, "%s", cur_cpu_spec
->cpu_name
);
775 seq_printf(m
, "unknown (%08x)", pvr
);
777 #ifdef CONFIG_ALTIVEC
778 if (cpu_has_feature(CPU_FTR_ALTIVEC
))
779 seq_printf(m
, ", altivec supported");
780 #endif /* CONFIG_ALTIVEC */
785 * Assume here that all clock rates are the same in a
786 * smp system. -- Cort
788 seq_printf(m
, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq
/ 1000000,
789 ppc_proc_freq
% 1000000);
791 seq_printf(m
, "revision\t: %hd.%hd\n\n", maj
, min
);
797 static void *c_start(struct seq_file
*m
, loff_t
*pos
)
799 return *pos
<= NR_CPUS
? (void *)((*pos
)+1) : NULL
;
801 static void *c_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
804 return c_start(m
, pos
);
806 static void c_stop(struct seq_file
*m
, void *v
)
809 struct seq_operations cpuinfo_op
= {
813 .show
= show_cpuinfo
,
817 * These three variables are used to save values passed to us by prom_init()
818 * via the device tree. The TCE variables are needed because with a memory_limit
819 * in force we may need to explicitly map the TCE are at the top of RAM.
821 unsigned long memory_limit
;
822 unsigned long tce_alloc_start
;
823 unsigned long tce_alloc_end
;
825 #ifdef CONFIG_PPC_ISERIES
827 * On iSeries we just parse the mem=X option from the command line.
828 * On pSeries it's a bit more complicated, see prom_init_mem()
830 static int __init
early_parsemem(char *p
)
835 memory_limit
= ALIGN(memparse(p
, &p
), PAGE_SIZE
);
839 early_param("mem", early_parsemem
);
840 #endif /* CONFIG_PPC_ISERIES */
842 #ifdef CONFIG_PPC_MULTIPLATFORM
843 static int __init
set_preferred_console(void)
845 struct device_node
*prom_stdout
= NULL
;
850 DBG(" -> set_preferred_console()\n");
852 /* The user has requested a console so this is already set up. */
853 if (strstr(saved_command_line
, "console=")) {
854 DBG(" console was specified !\n");
859 DBG(" of_chosen is NULL !\n");
862 /* We are getting a weird phandle from OF ... */
863 /* ... So use the full path instead */
864 name
= (char *)get_property(of_chosen
, "linux,stdout-path", NULL
);
866 DBG(" no linux,stdout-path !\n");
869 prom_stdout
= of_find_node_by_path(name
);
871 DBG(" can't find stdout package %s !\n", name
);
874 DBG("stdout is %s\n", prom_stdout
->full_name
);
876 name
= (char *)get_property(prom_stdout
, "name", NULL
);
878 DBG(" stdout package has no name !\n");
881 spd
= (u32
*)get_property(prom_stdout
, "current-speed", NULL
);
885 #ifdef CONFIG_SERIAL_8250_CONSOLE
886 else if (strcmp(name
, "serial") == 0) {
888 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", &i
);
904 /* We dont recognise the serial port */
909 #endif /* CONFIG_SERIAL_8250_CONSOLE */
910 #ifdef CONFIG_PPC_PSERIES
911 else if (strcmp(name
, "vty") == 0) {
912 u32
*reg
= (u32
*)get_property(prom_stdout
, "reg", NULL
);
913 char *compat
= (char *)get_property(prom_stdout
, "compatible", NULL
);
915 if (reg
&& compat
&& (strcmp(compat
, "hvterm-protocol") == 0)) {
916 /* Host Virtual Serial Interface */
928 of_node_put(prom_stdout
);
929 DBG("Found hvsi console at offset %d\n", offset
);
930 return add_preferred_console("hvsi", offset
, NULL
);
932 /* pSeries LPAR virtual console */
933 of_node_put(prom_stdout
);
934 DBG("Found hvc console\n");
935 return add_preferred_console("hvc", 0, NULL
);
938 #endif /* CONFIG_PPC_PSERIES */
939 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
940 else if (strcmp(name
, "ch-a") == 0)
942 else if (strcmp(name
, "ch-b") == 0)
944 #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
947 of_node_put(prom_stdout
);
949 DBG("Found serial console at ttyS%d\n", offset
);
952 static char __initdata opt
[16];
953 sprintf(opt
, "%d", *spd
);
954 return add_preferred_console("ttyS", offset
, opt
);
956 return add_preferred_console("ttyS", offset
, NULL
);
959 DBG("No preferred console found !\n");
960 of_node_put(prom_stdout
);
963 console_initcall(set_preferred_console
);
964 #endif /* CONFIG_PPC_MULTIPLATFORM */
966 #ifdef CONFIG_IRQSTACKS
967 static void __init
irqstack_early_init(void)
972 * interrupt stacks must be under 256MB, we cannot afford to take
973 * SLB misses on them.
976 softirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
977 THREAD_SIZE
, 0x10000000));
978 hardirq_ctx
[i
] = (struct thread_info
*)__va(lmb_alloc_base(THREAD_SIZE
,
979 THREAD_SIZE
, 0x10000000));
983 #define irqstack_early_init()
987 * Stack space used when we detect a bad kernel stack pointer, and
988 * early in SMP boots before relocation is enabled.
990 static void __init
emergency_stack_init(void)
996 * Emergency stacks must be under 256MB, we cannot afford to take
997 * SLB misses on them. The ABI also requires them to be 128-byte
1000 * Since we use these as temporary stacks during secondary CPU
1001 * bringup, we need to get at them in real mode. This means they
1002 * must also be within the RMO region.
1004 limit
= min(0x10000000UL
, lmb
.rmo_size
);
1007 paca
[i
].emergency_sp
= __va(lmb_alloc_base(PAGE_SIZE
, 128,
1008 limit
)) + PAGE_SIZE
;
1012 * Called from setup_arch to initialize the bitmap of available
1013 * syscalls in the systemcfg page
1015 void __init
setup_syscall_map(void)
1017 unsigned int i
, count64
= 0, count32
= 0;
1018 extern unsigned long *sys_call_table
;
1019 extern unsigned long *sys_call_table32
;
1020 extern unsigned long sys_ni_syscall
;
1023 for (i
= 0; i
< __NR_syscalls
; i
++) {
1024 if (sys_call_table
[i
] == sys_ni_syscall
)
1027 systemcfg
->syscall_map_64
[i
>> 5] |= 0x80000000UL
>> (i
& 0x1f);
1029 for (i
= 0; i
< __NR_syscalls
; i
++) {
1030 if (sys_call_table32
[i
] == sys_ni_syscall
)
1033 systemcfg
->syscall_map_32
[i
>> 5] |= 0x80000000UL
>> (i
& 0x1f);
1035 printk(KERN_INFO
"Syscall map setup, %d 32 bits and %d 64 bits syscalls\n",
1040 * Called into from start_kernel, after lock_kernel has been called.
1041 * Initializes bootmem, which is unsed to manage page allocation until
1042 * mem_init is called.
1044 void __init
setup_arch(char **cmdline_p
)
1046 extern void do_init_bootmem(void);
1048 ppc64_boot_msg(0x12, "Setup Arch");
1050 *cmdline_p
= cmd_line
;
1053 * Set cache line size based on type of cpu as a default.
1054 * Systems with OF can look in the properties on the cpu node(s)
1055 * for a possibly more accurate value.
1057 dcache_bsize
= ppc64_caches
.dline_size
;
1058 icache_bsize
= ppc64_caches
.iline_size
;
1060 /* reboot on panic */
1061 panic_timeout
= 180;
1064 notifier_chain_register(&panic_notifier_list
, &ppc64_panic_block
);
1066 init_mm
.start_code
= PAGE_OFFSET
;
1067 init_mm
.end_code
= (unsigned long) _etext
;
1068 init_mm
.end_data
= (unsigned long) _edata
;
1069 init_mm
.brk
= klimit
;
1071 irqstack_early_init();
1072 emergency_stack_init();
1074 /* set up the bootmem stuff with available memory */
1078 /* initialize the syscall map in systemcfg */
1079 setup_syscall_map();
1081 ppc_md
.setup_arch();
1083 /* Use the default idle loop if the platform hasn't provided one. */
1084 if (NULL
== ppc_md
.idle_loop
) {
1085 ppc_md
.idle_loop
= default_idle
;
1086 printk(KERN_INFO
"Using default idle loop\n");
1090 ppc64_boot_msg(0x15, "Setup Done");
1094 /* ToDo: do something useful if ppc_md is not yet setup. */
1095 #define PPC64_LINUX_FUNCTION 0x0f000000
1096 #define PPC64_IPL_MESSAGE 0xc0000000
1097 #define PPC64_TERM_MESSAGE 0xb0000000
1098 #define PPC64_ATTN_MESSAGE 0xa0000000
1099 #define PPC64_DUMP_MESSAGE 0xd0000000
1101 static void ppc64_do_msg(unsigned int src
, const char *msg
)
1103 if (ppc_md
.progress
) {
1106 sprintf(buf
, "%08X\n", src
);
1107 ppc_md
.progress(buf
, 0);
1108 snprintf(buf
, 128, "%s", msg
);
1109 ppc_md
.progress(buf
, 0);
1113 /* Print a boot progress message. */
1114 void ppc64_boot_msg(unsigned int src
, const char *msg
)
1116 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_IPL_MESSAGE
|src
, msg
);
1117 printk("[boot]%04x %s\n", src
, msg
);
1120 /* Print a termination message (print only -- does not stop the kernel) */
1121 void ppc64_terminate_msg(unsigned int src
, const char *msg
)
1123 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_TERM_MESSAGE
|src
, msg
);
1124 printk("[terminate]%04x %s\n", src
, msg
);
1127 /* Print something that needs attention (device error, etc) */
1128 void ppc64_attention_msg(unsigned int src
, const char *msg
)
1130 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_ATTN_MESSAGE
|src
, msg
);
1131 printk("[attention]%04x %s\n", src
, msg
);
1134 /* Print a dump progress message. */
1135 void ppc64_dump_msg(unsigned int src
, const char *msg
)
1137 ppc64_do_msg(PPC64_LINUX_FUNCTION
|PPC64_DUMP_MESSAGE
|src
, msg
);
1138 printk("[dump]%04x %s\n", src
, msg
);
1141 /* This should only be called on processor 0 during calibrate decr */
1142 void __init
setup_default_decr(void)
1144 struct paca_struct
*lpaca
= get_paca();
1146 lpaca
->default_decr
= tb_ticks_per_jiffy
;
1147 lpaca
->next_jiffy_update_tb
= get_tb() + tb_ticks_per_jiffy
;
1150 #ifndef CONFIG_PPC_ISERIES
1152 * This function can be used by platforms to "find" legacy serial ports.
1153 * It works for "serial" nodes under an "isa" node, and will try to
1154 * respect the "ibm,aix-loc" property if any. It works with up to 8
1158 #define MAX_LEGACY_SERIAL_PORTS 8
1159 static struct plat_serial8250_port serial_ports
[MAX_LEGACY_SERIAL_PORTS
+1];
1160 static unsigned int old_serial_count
;
1162 void __init
generic_find_legacy_serial_ports(u64
*physport
,
1163 unsigned int *default_speed
)
1165 struct device_node
*np
;
1168 struct isa_reg_property
{
1173 struct pci_reg_property
{
1174 struct pci_address addr
;
1179 DBG(" -> generic_find_legacy_serial_port()\n");
1185 np
= of_find_node_by_path("/");
1189 /* First fill our array */
1190 for (np
= NULL
; (np
= of_find_node_by_type(np
, "serial"));) {
1191 struct device_node
*isa
, *pci
;
1192 struct isa_reg_property
*reg
;
1193 unsigned long phys_size
, addr_size
, io_base
;
1195 u32
*interrupts
, *clk
, *spd
;
1197 int index
, rlen
, rentsize
;
1199 /* Ok, first check if it's under an "isa" parent */
1200 isa
= of_get_parent(np
);
1201 if (!isa
|| strcmp(isa
->name
, "isa")) {
1202 DBG("%s: no isa parent found\n", np
->full_name
);
1206 /* Now look for an "ibm,aix-loc" property that gives us ordering
1209 typep
= (char *)get_property(np
, "ibm,aix-loc", NULL
);
1211 /* Get the ISA port number */
1212 reg
= (struct isa_reg_property
*)get_property(np
, "reg", NULL
);
1215 /* We assume the interrupt number isn't translated ... */
1216 interrupts
= (u32
*)get_property(np
, "interrupts", NULL
);
1217 /* get clock freq. if present */
1218 clk
= (u32
*)get_property(np
, "clock-frequency", NULL
);
1219 /* get default speed if present */
1220 spd
= (u32
*)get_property(np
, "current-speed", NULL
);
1221 /* Default to locate at end of array */
1222 index
= old_serial_count
; /* end of the array by default */
1224 /* If we have a location index, then use it */
1225 if (typep
&& *typep
== 'S') {
1226 index
= simple_strtol(typep
+1, NULL
, 0) - 1;
1227 /* if index is out of range, use end of array instead */
1228 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1229 index
= old_serial_count
;
1230 /* if our index is still out of range, that mean that
1231 * array is full, we could scan for a free slot but that
1232 * make little sense to bother, just skip the port
1234 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1236 if (index
>= old_serial_count
)
1237 old_serial_count
= index
+ 1;
1238 /* Check if there is a port who already claimed our slot */
1239 if (serial_ports
[index
].iobase
!= 0) {
1240 /* if we still have some room, move it, else override */
1241 if (old_serial_count
< MAX_LEGACY_SERIAL_PORTS
) {
1242 DBG("Moved legacy port %d -> %d\n", index
,
1244 serial_ports
[old_serial_count
++] =
1245 serial_ports
[index
];
1247 DBG("Replacing legacy port %d\n", index
);
1251 if (index
>= MAX_LEGACY_SERIAL_PORTS
)
1253 if (index
>= old_serial_count
)
1254 old_serial_count
= index
+ 1;
1256 /* Now fill the entry */
1257 memset(&serial_ports
[index
], 0, sizeof(struct plat_serial8250_port
));
1258 serial_ports
[index
].uartclk
= clk
? *clk
: BASE_BAUD
* 16;
1259 serial_ports
[index
].iobase
= reg
->address
;
1260 serial_ports
[index
].irq
= interrupts
? interrupts
[0] : 0;
1261 serial_ports
[index
].flags
= ASYNC_BOOT_AUTOCONF
;
1263 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1265 serial_ports
[index
].iobase
,
1266 serial_ports
[index
].irq
,
1267 serial_ports
[index
].uartclk
);
1269 /* Get phys address of IO reg for port 1 */
1273 pci
= of_get_parent(isa
);
1275 DBG("%s: no pci parent found\n", np
->full_name
);
1279 rangesp
= (u32
*)get_property(pci
, "ranges", &rlen
);
1280 if (rangesp
== NULL
) {
1286 /* we need the #size-cells of the PCI bridge node itself */
1288 sizeprop
= (u32
*)get_property(pci
, "#size-cells", NULL
);
1289 if (sizeprop
!= NULL
)
1290 phys_size
= *sizeprop
;
1291 /* we need the parent #addr-cells */
1292 addr_size
= prom_n_addr_cells(pci
);
1293 rentsize
= 3 + addr_size
+ phys_size
;
1295 for (;rlen
>= rentsize
; rlen
-= rentsize
,rangesp
+= rentsize
) {
1296 if (((rangesp
[0] >> 24) & 0x3) != 1)
1297 continue; /* not IO space */
1298 io_base
= rangesp
[3];
1300 io_base
= (io_base
<< 32) | rangesp
[4];
1303 *physport
= io_base
+ reg
->address
;
1304 if (default_speed
&& spd
)
1305 *default_speed
= *spd
;
1312 DBG(" <- generic_find_legacy_serial_port()\n");
1315 static struct platform_device serial_device
= {
1316 .name
= "serial8250",
1319 .platform_data
= serial_ports
,
1323 static int __init
serial_dev_init(void)
1325 return platform_device_register(&serial_device
);
1327 arch_initcall(serial_dev_init
);
1329 #endif /* CONFIG_PPC_ISERIES */
1331 int check_legacy_ioport(unsigned long base_port
)
1333 if (ppc_md
.check_legacy_ioport
== NULL
)
1335 return ppc_md
.check_legacy_ioport(base_port
);
1337 EXPORT_SYMBOL(check_legacy_ioport
);
1340 static int __init
early_xmon(char *p
)
1342 /* ensure xmon is enabled */
1344 if (strncmp(p
, "on", 2) == 0)
1346 if (strncmp(p
, "early", 5) != 0)
1354 early_param("xmon", early_xmon
);