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/utsname.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>
61 #include <asm/firmware.h>
62 #include <asm/systemcfg.h>
65 #define DBG(fmt...) udbg_printf(fmt)
71 * Here are some early debugging facilities. You can enable one
72 * but your kernel will not boot on anything else if you do so
75 /* This one is for use on LPAR machines that support an HVC console
78 extern void udbg_init_debug_lpar(void);
79 /* This one is for use on Apple G5 machines
81 extern void udbg_init_pmac_realmode(void);
82 /* That's RTAS panel debug */
83 extern void call_rtas_display_status_delay(unsigned char c);
84 /* Here's maple real mode debug */
85 extern void udbg_init_maple_realmode(void);
87 #define EARLY_DEBUG_INIT() do {} while(0)
90 #define EARLY_DEBUG_INIT() udbg_init_debug_lpar()
91 #define EARLY_DEBUG_INIT() udbg_init_maple_realmode()
92 #define EARLY_DEBUG_INIT() udbg_init_pmac_realmode()
93 #define EARLY_DEBUG_INIT() \
94 do { udbg_putc = call_rtas_display_status_delay; } while(0)
97 /* extern void *stab; */
98 extern unsigned long klimit;
100 extern void mm_init_ppc64(void);
101 extern void stab_initialize(unsigned long stab);
102 extern void htab_initialize(void);
103 extern void early_init_devtree(void *flat_dt);
104 extern void unflatten_device_tree(void);
106 extern void smp_release_cpus(void);
110 int boot_cpuid_phys = 0;
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
160 static int smt_enabled_cmdline;
162 /* Look for ibm,smt-enabled OF option */
163 static void check_smt_enabled(void)
165 struct device_node *dn;
168 /* Allow the command line to overrule the OF option */
169 if (smt_enabled_cmdline)
172 dn = of_find_node_by_path("/options");
175 smt_option = (char *)get_property(dn, "ibm,smt-enabled", NULL);
178 if (!strcmp(smt_option, "on"))
179 smt_enabled_at_boot = 1;
180 else if (!strcmp(smt_option, "off"))
181 smt_enabled_at_boot = 0;
186 /* Look for smt-enabled= cmdline option */
187 static int __init early_smt_enabled(char *p)
189 smt_enabled_cmdline = 1;
194 if (!strcmp(p, "on") || !strcmp(p, "1"))
195 smt_enabled_at_boot = 1;
196 else if (!strcmp(p, "off") || !strcmp(p, "0"))
197 smt_enabled_at_boot = 0;
201 early_param("smt-enabled", early_smt_enabled);
204 * setup_cpu_maps - initialize the following cpu maps:
209 * Having the possible map set up early allows us to restrict allocations
210 * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
212 * We do not initialize the online map here; cpus set their own bits in
213 * cpu_online_map as they come up.
215 * This function is valid only for Open Firmware systems. finish_device_tree
216 * must be called before using this.
218 * While we're here, we may as well set the "physical" cpu ids in the paca.
220 static void __init setup_cpu_maps(void)
222 struct device_node *dn = NULL;
228 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
230 int j, len = sizeof(u32), nthreads;
232 intserv = (u32 *)get_property(dn, "ibm,ppc-interrupt-server#s",
235 intserv = (u32 *)get_property(dn, "reg", NULL);
237 nthreads = len / sizeof(u32);
239 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
240 cpu_set(cpu, cpu_present_map);
241 set_hard_smp_processor_id(cpu, intserv[j]);
243 if (intserv[j] == boot_cpuid_phys)
245 cpu_set(cpu, cpu_possible_map);
250 /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that
251 * boot cpu is logical 0.
253 if (boot_cpuid_phys != get_hard_smp_processor_id(0)) {
255 tmp = get_hard_smp_processor_id(0);
256 set_hard_smp_processor_id(0, boot_cpuid_phys);
257 set_hard_smp_processor_id(swap_cpuid, tmp);
261 * On pSeries LPAR, we need to know how many cpus
262 * could possibly be added to this partition.
264 if (systemcfg->platform == PLATFORM_PSERIES_LPAR &&
265 (dn = of_find_node_by_path("/rtas"))) {
266 int num_addr_cell, num_size_cell, maxcpus;
269 num_addr_cell = prom_n_addr_cells(dn);
270 num_size_cell = prom_n_size_cells(dn);
272 ireg = (unsigned int *)
273 get_property(dn, "ibm,lrdr-capacity", NULL);
278 maxcpus = ireg[num_addr_cell + num_size_cell];
280 /* Double maxcpus for processors which have SMT capability */
281 if (cpu_has_feature(CPU_FTR_SMT))
284 if (maxcpus > NR_CPUS) {
286 "Partition configured for %d cpus, "
287 "operating system maximum is %d.\n",
291 printk(KERN_INFO "Partition configured for %d cpus.\n",
294 for (cpu = 0; cpu < maxcpus; cpu++)
295 cpu_set(cpu, cpu_possible_map);
301 * Do the sibling map; assume only two threads per processor.
304 cpu_set(cpu, cpu_sibling_map[cpu]);
305 if (cpu_has_feature(CPU_FTR_SMT))
306 cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]);
309 systemcfg->processorCount = num_present_cpus();
311 #endif /* CONFIG_SMP */
313 extern struct machdep_calls pSeries_md;
314 extern struct machdep_calls pmac_md;
315 extern struct machdep_calls maple_md;
316 extern struct machdep_calls bpa_md;
317 extern struct machdep_calls iseries_md;
319 /* Ultimately, stuff them in an elf section like initcalls... */
320 static struct machdep_calls __initdata *machines[] = {
321 #ifdef CONFIG_PPC_PSERIES
323 #endif /* CONFIG_PPC_PSERIES */
324 #ifdef CONFIG_PPC_PMAC
326 #endif /* CONFIG_PPC_PMAC */
327 #ifdef CONFIG_PPC_MAPLE
329 #endif /* CONFIG_PPC_MAPLE */
330 #ifdef CONFIG_PPC_BPA
333 #ifdef CONFIG_PPC_ISERIES
340 * Early initialization entry point. This is called by head.S
341 * with MMU translation disabled. We rely on the "feature" of
342 * the CPU that ignores the top 2 bits of the address in real
343 * mode so we can access kernel globals normally provided we
344 * only toy with things in the RMO region. From here, we do
345 * some early parsing of the device-tree to setup out LMB
346 * data structures, and allocate & initialize the hash table
347 * and segment tables so we can start running with translation
350 * It is this function which will call the probe() callback of
351 * the various platform types and copy the matching one to the
352 * global ppc_md structure. Your platform can eventually do
353 * some very early initializations from the probe() routine, but
354 * this is not recommended, be very careful as, for example, the
355 * device-tree is not accessible via normal means at this point.
358 void __init early_setup(unsigned long dt_ptr)
360 struct paca_struct *lpaca = get_paca();
361 static struct machdep_calls **mach;
364 * Enable early debugging if any specified (see top of
369 DBG(" -> early_setup()\n");
372 * Fill the default DBG level (do we want to keep
373 * that old mecanism around forever ?)
378 * Do early initializations using the flattened device
379 * tree, like retreiving the physical memory map or
380 * calculating/retreiving the hash table size
382 early_init_devtree(__va(dt_ptr));
385 * Iterate all ppc_md structures until we find the proper
386 * one for the current machine type
388 DBG("Probing machine type for platform %x...\n",
389 systemcfg->platform);
391 for (mach = machines; *mach; mach++) {
392 if ((*mach)->probe(systemcfg->platform))
395 /* What can we do if we didn't find ? */
397 DBG("No suitable machine found !\n");
402 DBG("Found, Initializing memory management...\n");
405 * Initialize stab / SLB management
407 if (!firmware_has_feature(FW_FEATURE_ISERIES))
408 stab_initialize(lpaca->stab_real);
411 * Initialize the MMU Hash table and create the linear mapping
416 DBG(" <- early_setup()\n");
421 * Initialize some remaining members of the ppc64_caches and systemcfg structures
422 * (at least until we get rid of them completely). This is mostly some
423 * cache informations about the CPU that will be used by cache flush
424 * routines and/or provided to userland
426 static void __init initialize_cache_info(void)
428 struct device_node *np;
429 unsigned long num_cpus = 0;
431 DBG(" -> initialize_cache_info()\n");
433 for (np = NULL; (np = of_find_node_by_type(np, "cpu"));) {
436 /* We're assuming *all* of the CPUs have the same
437 * d-cache and i-cache sizes... -Peter
440 if ( num_cpus == 1 ) {
445 /* Then read cache informations */
446 if (systemcfg->platform == PLATFORM_POWERMAC) {
447 dc = "d-cache-block-size";
448 ic = "i-cache-block-size";
450 dc = "d-cache-line-size";
451 ic = "i-cache-line-size";
455 lsize = cur_cpu_spec->dcache_bsize;
456 sizep = (u32 *)get_property(np, "d-cache-size", NULL);
459 lsizep = (u32 *) get_property(np, dc, NULL);
462 if (sizep == 0 || lsizep == 0)
463 DBG("Argh, can't find dcache properties ! "
464 "sizep: %p, lsizep: %p\n", sizep, lsizep);
466 systemcfg->dcache_size = ppc64_caches.dsize = size;
467 systemcfg->dcache_line_size =
468 ppc64_caches.dline_size = lsize;
469 ppc64_caches.log_dline_size = __ilog2(lsize);
470 ppc64_caches.dlines_per_page = PAGE_SIZE / lsize;
473 lsize = cur_cpu_spec->icache_bsize;
474 sizep = (u32 *)get_property(np, "i-cache-size", NULL);
477 lsizep = (u32 *)get_property(np, ic, NULL);
480 if (sizep == 0 || lsizep == 0)
481 DBG("Argh, can't find icache properties ! "
482 "sizep: %p, lsizep: %p\n", sizep, lsizep);
484 systemcfg->icache_size = ppc64_caches.isize = size;
485 systemcfg->icache_line_size =
486 ppc64_caches.iline_size = lsize;
487 ppc64_caches.log_iline_size = __ilog2(lsize);
488 ppc64_caches.ilines_per_page = PAGE_SIZE / lsize;
492 /* Add an eye catcher and the systemcfg layout version number */
493 strcpy(systemcfg->eye_catcher, "SYSTEMCFG:PPC64");
494 systemcfg->version.major = SYSTEMCFG_MAJOR;
495 systemcfg->version.minor = SYSTEMCFG_MINOR;
496 systemcfg->processor = mfspr(SPRN_PVR);
498 DBG(" <- initialize_cache_info()\n");
501 static void __init check_for_initrd(void)
503 #ifdef CONFIG_BLK_DEV_INITRD
506 DBG(" -> check_for_initrd()\n");
509 prop = (u64 *)get_property(of_chosen,
510 "linux,initrd-start", NULL);
512 initrd_start = (unsigned long)__va(*prop);
513 prop = (u64 *)get_property(of_chosen,
514 "linux,initrd-end", NULL);
516 initrd_end = (unsigned long)__va(*prop);
517 initrd_below_start_ok = 1;
523 /* If we were passed an initrd, set the ROOT_DEV properly if the values
524 * look sensible. If not, clear initrd reference.
526 if (initrd_start >= KERNELBASE && initrd_end >= KERNELBASE &&
527 initrd_end > initrd_start)
528 ROOT_DEV = Root_RAM0;
530 initrd_start = initrd_end = 0;
533 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
535 DBG(" <- check_for_initrd()\n");
536 #endif /* CONFIG_BLK_DEV_INITRD */
540 * Do some initial setup of the system. The parameters are those which
541 * were passed in from the bootloader.
543 void __init setup_system(void)
545 DBG(" -> setup_system()\n");
548 * Unflatten the device-tree passed by prom_init or kexec
550 unflatten_device_tree();
553 * Fill the ppc64_caches & systemcfg structures with informations
554 * retreived from the device-tree. Need to be called before
555 * finish_device_tree() since the later requires some of the
556 * informations filled up here to properly parse the interrupt
558 * It also sets up the cache line sizes which allows to call
559 * routines like flush_icache_range (used by the hash init
562 initialize_cache_info();
564 #ifdef CONFIG_PPC_RTAS
566 * Initialize RTAS if available
569 #endif /* CONFIG_PPC_RTAS */
572 * Check if we have an initrd provided via the device-tree
577 * Do some platform specific early initializations, that includes
578 * setting up the hash table pointers. It also sets up some interrupt-mapping
579 * related options that will be used by finish_device_tree()
584 * "Finish" the device-tree, that is do the actual parsing of
585 * some of the properties like the interrupt map
587 finish_device_tree();
589 #ifdef CONFIG_BOOTX_TEXT
596 #ifdef CONFIG_XMON_DEFAULT
600 * Register early console
602 register_early_udbg_console();
604 /* Save unparsed command line copy for /proc/cmdline */
605 strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
611 * iSeries has already initialized the cpu maps at this point.
615 /* Release secondary cpus out of their spinloops at 0x60 now that
616 * we can map physical -> logical CPU ids
621 printk("Starting Linux PPC64 %s\n", system_utsname.version);
623 printk("-----------------------------------------------------\n");
624 printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size);
625 printk("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch);
626 printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller);
627 printk("systemcfg = 0x%p\n", systemcfg);
628 printk("systemcfg->platform = 0x%x\n", systemcfg->platform);
629 printk("systemcfg->processorCount = 0x%lx\n", systemcfg->processorCount);
630 printk("systemcfg->physicalMemorySize = 0x%lx\n", systemcfg->physicalMemorySize);
631 printk("ppc64_caches.dcache_line_size = 0x%x\n",
632 ppc64_caches.dline_size);
633 printk("ppc64_caches.icache_line_size = 0x%x\n",
634 ppc64_caches.iline_size);
635 printk("htab_address = 0x%p\n", htab_address);
636 printk("htab_hash_mask = 0x%lx\n", htab_hash_mask);
637 printk("-----------------------------------------------------\n");
641 DBG(" <- setup_system()\n");
644 /* also used by kexec */
645 void machine_shutdown(void)
647 if (ppc_md.nvram_sync)
651 void machine_restart(char *cmd)
658 printk(KERN_EMERG "System Halted, OK to turn off power\n");
663 void machine_power_off(void)
670 printk(KERN_EMERG "System Halted, OK to turn off power\n");
674 /* Used by the G5 thermal driver */
675 EXPORT_SYMBOL_GPL(machine_power_off);
677 void machine_halt(void)
684 printk(KERN_EMERG "System Halted, OK to turn off power\n");
689 static int ppc64_panic_event(struct notifier_block *this,
690 unsigned long event, void *ptr)
692 ppc_md.panic((char *)ptr); /* May not return */
698 DEFINE_PER_CPU(unsigned int, pvr);
701 static int show_cpuinfo(struct seq_file *m, void *v)
703 unsigned long cpu_id = (unsigned long)v - 1;
708 if (cpu_id == NR_CPUS) {
709 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
711 if (ppc_md.show_cpuinfo != NULL)
712 ppc_md.show_cpuinfo(m);
717 /* We only show online cpus: disable preempt (overzealous, I
718 * knew) to prevent cpu going down. */
720 if (!cpu_online(cpu_id)) {
726 pvr = per_cpu(pvr, cpu_id);
728 pvr = mfspr(SPRN_PVR);
730 maj = (pvr >> 8) & 0xFF;
733 seq_printf(m, "processor\t: %lu\n", cpu_id);
734 seq_printf(m, "cpu\t\t: ");
736 if (cur_cpu_spec->pvr_mask)
737 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
739 seq_printf(m, "unknown (%08x)", pvr);
741 #ifdef CONFIG_ALTIVEC
742 if (cpu_has_feature(CPU_FTR_ALTIVEC))
743 seq_printf(m, ", altivec supported");
744 #endif /* CONFIG_ALTIVEC */
749 * Assume here that all clock rates are the same in a
750 * smp system. -- Cort
752 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", ppc_proc_freq / 1000000,
753 ppc_proc_freq % 1000000);
755 seq_printf(m, "revision\t: %hd.%hd\n\n", maj, min);
761 static void *c_start(struct seq_file *m, loff_t *pos)
763 return *pos <= NR_CPUS ? (void *)((*pos)+1) : NULL;
765 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
768 return c_start(m, pos);
770 static void c_stop(struct seq_file *m, void *v)
773 struct seq_operations cpuinfo_op = {
777 .show = show_cpuinfo,
781 * These three variables are used to save values passed to us by prom_init()
782 * via the device tree. The TCE variables are needed because with a memory_limit
783 * in force we may need to explicitly map the TCE are at the top of RAM.
785 unsigned long memory_limit;
786 unsigned long tce_alloc_start;
787 unsigned long tce_alloc_end;
789 #ifdef CONFIG_PPC_ISERIES
791 * On iSeries we just parse the mem=X option from the command line.
792 * On pSeries it's a bit more complicated, see prom_init_mem()
794 static int __init early_parsemem(char *p)
799 memory_limit = ALIGN(memparse(p, &p), PAGE_SIZE);
803 early_param("mem", early_parsemem);
804 #endif /* CONFIG_PPC_ISERIES */
806 #ifdef CONFIG_PPC_MULTIPLATFORM
807 static int __init set_preferred_console(void)
809 struct device_node *prom_stdout = NULL;
814 DBG(" -> set_preferred_console()\n");
816 /* The user has requested a console so this is already set up. */
817 if (strstr(saved_command_line, "console=")) {
818 DBG(" console was specified !\n");
823 DBG(" of_chosen is NULL !\n");
826 /* We are getting a weird phandle from OF ... */
827 /* ... So use the full path instead */
828 name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
830 DBG(" no linux,stdout-path !\n");
833 prom_stdout = of_find_node_by_path(name);
835 DBG(" can't find stdout package %s !\n", name);
838 DBG("stdout is %s\n", prom_stdout->full_name);
840 name = (char *)get_property(prom_stdout, "name", NULL);
842 DBG(" stdout package has no name !\n");
845 spd = (u32 *)get_property(prom_stdout, "current-speed", NULL);
849 #ifdef CONFIG_SERIAL_8250_CONSOLE
850 else if (strcmp(name, "serial") == 0) {
852 u32 *reg = (u32 *)get_property(prom_stdout, "reg", &i);
868 /* We dont recognise the serial port */
873 #endif /* CONFIG_SERIAL_8250_CONSOLE */
874 #ifdef CONFIG_PPC_PSERIES
875 else if (strcmp(name, "vty") == 0) {
876 u32 *reg = (u32 *)get_property(prom_stdout, "reg", NULL);
877 char *compat = (char *)get_property(prom_stdout, "compatible", NULL);
879 if (reg && compat && (strcmp(compat, "hvterm-protocol") == 0)) {
880 /* Host Virtual Serial Interface */
892 of_node_put(prom_stdout);
893 DBG("Found hvsi console at offset %d\n", offset);
894 return add_preferred_console("hvsi", offset, NULL);
896 /* pSeries LPAR virtual console */
897 of_node_put(prom_stdout);
898 DBG("Found hvc console\n");
899 return add_preferred_console("hvc", 0, NULL);
902 #endif /* CONFIG_PPC_PSERIES */
903 #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
904 else if (strcmp(name, "ch-a") == 0)
906 else if (strcmp(name, "ch-b") == 0)
908 #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
911 of_node_put(prom_stdout);
913 DBG("Found serial console at ttyS%d\n", offset);
916 static char __initdata opt[16];
917 sprintf(opt, "%d", *spd);
918 return add_preferred_console("ttyS", offset, opt);
920 return add_preferred_console("ttyS", offset, NULL);
923 DBG("No preferred console found !\n");
924 of_node_put(prom_stdout);
927 console_initcall(set_preferred_console);
928 #endif /* CONFIG_PPC_MULTIPLATFORM */
930 #ifdef CONFIG_IRQSTACKS
931 static void __init irqstack_early_init(void)
936 * interrupt stacks must be under 256MB, we cannot afford to take
937 * SLB misses on them.
940 softirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
941 THREAD_SIZE, 0x10000000));
942 hardirq_ctx[i] = (struct thread_info *)__va(lmb_alloc_base(THREAD_SIZE,
943 THREAD_SIZE, 0x10000000));
947 #define irqstack_early_init()
951 * Stack space used when we detect a bad kernel stack pointer, and
952 * early in SMP boots before relocation is enabled.
954 static void __init emergency_stack_init(void)
960 * Emergency stacks must be under 256MB, we cannot afford to take
961 * SLB misses on them. The ABI also requires them to be 128-byte
964 * Since we use these as temporary stacks during secondary CPU
965 * bringup, we need to get at them in real mode. This means they
966 * must also be within the RMO region.
968 limit = min(0x10000000UL, lmb.rmo_size);
971 paca[i].emergency_sp = __va(lmb_alloc_base(PAGE_SIZE, 128,
976 * Called from setup_arch to initialize the bitmap of available
977 * syscalls in the systemcfg page
979 void __init setup_syscall_map(void)
981 unsigned int i, count64 = 0, count32 = 0;
982 extern unsigned long *sys_call_table;
983 extern unsigned long sys_ni_syscall;
986 for (i = 0; i < __NR_syscalls; i++) {
987 if (sys_call_table[i*2] != sys_ni_syscall) {
989 systemcfg->syscall_map_64[i >> 5] |=
990 0x80000000UL >> (i & 0x1f);
992 if (sys_call_table[i*2+1] != sys_ni_syscall) {
994 systemcfg->syscall_map_32[i >> 5] |=
995 0x80000000UL >> (i & 0x1f);
998 printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n",
1003 * Called into from start_kernel, after lock_kernel has been called.
1004 * Initializes bootmem, which is unsed to manage page allocation until
1005 * mem_init is called.
1007 void __init setup_arch(char **cmdline_p)
1009 extern void do_init_bootmem(void);
1011 ppc64_boot_msg(0x12, "Setup Arch");
1013 *cmdline_p = cmd_line;
1016 * Set cache line size based on type of cpu as a default.
1017 * Systems with OF can look in the properties on the cpu node(s)
1018 * for a possibly more accurate value.
1020 dcache_bsize = ppc64_caches.dline_size;
1021 icache_bsize = ppc64_caches.iline_size;
1023 /* reboot on panic */
1024 panic_timeout = 180;
1027 notifier_chain_register(&panic_notifier_list, &ppc64_panic_block);
1029 init_mm.start_code = PAGE_OFFSET;
1030 init_mm.end_code = (unsigned long) _etext;
1031 init_mm.end_data = (unsigned long) _edata;
1032 init_mm.brk = klimit;
1034 irqstack_early_init();
1035 emergency_stack_init();
1039 /* set up the bootmem stuff with available memory */
1043 /* initialize the syscall map in systemcfg */
1044 setup_syscall_map();
1046 #ifdef CONFIG_DUMMY_CONSOLE
1047 conswitchp = &dummy_con;
1050 ppc_md.setup_arch();
1052 /* Use the default idle loop if the platform hasn't provided one. */
1053 if (NULL == ppc_md.idle_loop) {
1054 ppc_md.idle_loop = default_idle;
1055 printk(KERN_INFO "Using default idle loop\n");
1059 ppc64_boot_msg(0x15, "Setup Done");
1063 /* ToDo: do something useful if ppc_md is not yet setup. */
1064 #define PPC64_LINUX_FUNCTION 0x0f000000
1065 #define PPC64_IPL_MESSAGE 0xc0000000
1066 #define PPC64_TERM_MESSAGE 0xb0000000
1068 static void ppc64_do_msg(unsigned int src, const char *msg)
1070 if (ppc_md.progress) {
1073 sprintf(buf, "%08X\n", src);
1074 ppc_md.progress(buf, 0);
1075 snprintf(buf, 128, "%s", msg);
1076 ppc_md.progress(buf, 0);
1080 /* Print a boot progress message. */
1081 void ppc64_boot_msg(unsigned int src, const char *msg)
1083 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_IPL_MESSAGE|src, msg);
1084 printk("[boot]%04x %s\n", src, msg);
1087 /* Print a termination message (print only -- does not stop the kernel) */
1088 void ppc64_terminate_msg(unsigned int src, const char *msg)
1090 ppc64_do_msg(PPC64_LINUX_FUNCTION|PPC64_TERM_MESSAGE|src, msg);
1091 printk("[terminate]%04x %s\n", src, msg);
1094 #ifndef CONFIG_PPC_ISERIES
1096 * This function can be used by platforms to "find" legacy serial ports.
1097 * It works for "serial" nodes under an "isa" node, and will try to
1098 * respect the "ibm,aix-loc" property if any. It works with up to 8
1102 #define MAX_LEGACY_SERIAL_PORTS 8
1103 static struct plat_serial8250_port serial_ports[MAX_LEGACY_SERIAL_PORTS+1];
1104 static unsigned int old_serial_count;
1106 void __init generic_find_legacy_serial_ports(u64 *physport,
1107 unsigned int *default_speed)
1109 struct device_node *np;
1112 struct isa_reg_property {
1117 struct pci_reg_property {
1118 struct pci_address addr;
1123 DBG(" -> generic_find_legacy_serial_port()\n");
1129 np = of_find_node_by_path("/");
1133 /* First fill our array */
1134 for (np = NULL; (np = of_find_node_by_type(np, "serial"));) {
1135 struct device_node *isa, *pci;
1136 struct isa_reg_property *reg;
1137 unsigned long phys_size, addr_size, io_base;
1139 u32 *interrupts, *clk, *spd;
1141 int index, rlen, rentsize;
1143 /* Ok, first check if it's under an "isa" parent */
1144 isa = of_get_parent(np);
1145 if (!isa || strcmp(isa->name, "isa")) {
1146 DBG("%s: no isa parent found\n", np->full_name);
1150 /* Now look for an "ibm,aix-loc" property that gives us ordering
1153 typep = (char *)get_property(np, "ibm,aix-loc", NULL);
1155 /* Get the ISA port number */
1156 reg = (struct isa_reg_property *)get_property(np, "reg", NULL);
1159 /* We assume the interrupt number isn't translated ... */
1160 interrupts = (u32 *)get_property(np, "interrupts", NULL);
1161 /* get clock freq. if present */
1162 clk = (u32 *)get_property(np, "clock-frequency", NULL);
1163 /* get default speed if present */
1164 spd = (u32 *)get_property(np, "current-speed", NULL);
1165 /* Default to locate at end of array */
1166 index = old_serial_count; /* end of the array by default */
1168 /* If we have a location index, then use it */
1169 if (typep && *typep == 'S') {
1170 index = simple_strtol(typep+1, NULL, 0) - 1;
1171 /* if index is out of range, use end of array instead */
1172 if (index >= MAX_LEGACY_SERIAL_PORTS)
1173 index = old_serial_count;
1174 /* if our index is still out of range, that mean that
1175 * array is full, we could scan for a free slot but that
1176 * make little sense to bother, just skip the port
1178 if (index >= MAX_LEGACY_SERIAL_PORTS)
1180 if (index >= old_serial_count)
1181 old_serial_count = index + 1;
1182 /* Check if there is a port who already claimed our slot */
1183 if (serial_ports[index].iobase != 0) {
1184 /* if we still have some room, move it, else override */
1185 if (old_serial_count < MAX_LEGACY_SERIAL_PORTS) {
1186 DBG("Moved legacy port %d -> %d\n", index,
1188 serial_ports[old_serial_count++] =
1189 serial_ports[index];
1191 DBG("Replacing legacy port %d\n", index);
1195 if (index >= MAX_LEGACY_SERIAL_PORTS)
1197 if (index >= old_serial_count)
1198 old_serial_count = index + 1;
1200 /* Now fill the entry */
1201 memset(&serial_ports[index], 0, sizeof(struct plat_serial8250_port));
1202 serial_ports[index].uartclk = clk ? *clk : BASE_BAUD * 16;
1203 serial_ports[index].iobase = reg->address;
1204 serial_ports[index].irq = interrupts ? interrupts[0] : 0;
1205 serial_ports[index].flags = ASYNC_BOOT_AUTOCONF;
1207 DBG("Added legacy port, index: %d, port: %x, irq: %d, clk: %d\n",
1209 serial_ports[index].iobase,
1210 serial_ports[index].irq,
1211 serial_ports[index].uartclk);
1213 /* Get phys address of IO reg for port 1 */
1217 pci = of_get_parent(isa);
1219 DBG("%s: no pci parent found\n", np->full_name);
1223 rangesp = (u32 *)get_property(pci, "ranges", &rlen);
1224 if (rangesp == NULL) {
1230 /* we need the #size-cells of the PCI bridge node itself */
1232 sizeprop = (u32 *)get_property(pci, "#size-cells", NULL);
1233 if (sizeprop != NULL)
1234 phys_size = *sizeprop;
1235 /* we need the parent #addr-cells */
1236 addr_size = prom_n_addr_cells(pci);
1237 rentsize = 3 + addr_size + phys_size;
1239 for (;rlen >= rentsize; rlen -= rentsize,rangesp += rentsize) {
1240 if (((rangesp[0] >> 24) & 0x3) != 1)
1241 continue; /* not IO space */
1242 io_base = rangesp[3];
1244 io_base = (io_base << 32) | rangesp[4];
1247 *physport = io_base + reg->address;
1248 if (default_speed && spd)
1249 *default_speed = *spd;
1256 DBG(" <- generic_find_legacy_serial_port()\n");
1259 static struct platform_device serial_device = {
1260 .name = "serial8250",
1261 .id = PLAT8250_DEV_PLATFORM,
1263 .platform_data = serial_ports,
1267 static int __init serial_dev_init(void)
1269 return platform_device_register(&serial_device);
1271 arch_initcall(serial_dev_init);
1273 #endif /* CONFIG_PPC_ISERIES */
1275 int check_legacy_ioport(unsigned long base_port)
1277 if (ppc_md.check_legacy_ioport == NULL)
1279 return ppc_md.check_legacy_ioport(base_port);
1281 EXPORT_SYMBOL(check_legacy_ioport);
1284 static int __init early_xmon(char *p)
1286 /* ensure xmon is enabled */
1288 if (strncmp(p, "on", 2) == 0)
1290 if (strncmp(p, "off", 3) == 0)
1292 if (strncmp(p, "early", 5) != 0)
1300 early_param("xmon", early_xmon);