// SPDX-License-Identifier: GPL-2.0-or-later/* *    Initial setup-routines for HP 9000 based hardware. * *    Copyright (C) 1991, 1992, 1995  Linus Torvalds *    Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de> *    Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) *    Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> *    Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> *    Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> * *    Initial PA-RISC Version: 04-23-1999 by Helge Deller */ #include <linux/kernel.h>#include <linux/initrd.h>#include <linux/init.h>#include <linux/console.h>#include <linux/seq_file.h>#define PCI_DEBUG#include <linux/pci.h>#undef PCI_DEBUG#include <linux/proc_fs.h>#include <linux/export.h>#include <linux/sched.h>#include <linux/sched/clock.h>#include <linux/start_kernel.h> #include <asm/cacheflush.h>#include <asm/processor.h>#include <asm/sections.h>#include <asm/pdc.h>#include <asm/led.h>#include <asm/pdc_chassis.h>#include <asm/io.h>#include <asm/setup.h>#include <asm/unwind.h>#include <asm/smp.h> static char __initdata command_line[COMMAND_LINE_SIZE]; static void __init setup_cmdline(char **cmdline_p){	extern unsigned int boot_args[];	char *p; 	*cmdline_p = command_line; 	/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */	if (boot_args[0] < 64)		return;	/* return if called from hpux boot loader */ 	/* Collect stuff passed in from the boot loader */	strscpy(boot_command_line, (char *)__va(boot_args[1]),		COMMAND_LINE_SIZE); 	/* autodetect console type (if not done by palo yet) */	p = boot_command_line;	if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {		strlcat(p, " console=", COMMAND_LINE_SIZE);		if (PAGE0->mem_cons.cl_class == CL_DUPLEX)			strlcat(p, "ttyS0", COMMAND_LINE_SIZE);		else			strlcat(p, "tty0", COMMAND_LINE_SIZE);	} 	/* default to use early console */	if (!strstr(p, "earlycon"))		strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE); #ifdef CONFIG_BLK_DEV_INITRD	/* did palo pass us a ramdisk? */	if (boot_args[2] != 0) {		initrd_start = (unsigned long)__va(boot_args[2]);		initrd_end = (unsigned long)__va(boot_args[3]);	}#endif 	strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);} #ifdef CONFIG_PA11static void __init dma_ops_init(void){	switch (boot_cpu_data.cpu_type) {	case pcx:		/*		 * We've got way too many dependencies on 1.1 semantics		 * to support 1.0 boxes at this point.		 */		panic(	"PA-RISC Linux currently only supports machines that conform to\n"			"the PA-RISC 1.1 or 2.0 architecture specification.\n"); 	case pcxl2:	default:		break;	}}#endif void __init setup_arch(char **cmdline_p){	unwind_init(); 	init_per_cpu(smp_processor_id());	/* Set Modes & Enable FP */ #ifdef CONFIG_64BIT	printk(KERN_INFO "The 64-bit Kernel has started...\n");#else	printk(KERN_INFO "The 32-bit Kernel has started...\n");#endif 	printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",		(int)(PAGE_SIZE / 1024));#ifdef CONFIG_HUGETLB_PAGE	printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",		 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));#else	printk(KERN_CONT "disabled");#endif	printk(KERN_CONT ".\n"); #ifdef CONFIG_64BIT	if(parisc_narrow_firmware) {		printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");	}#endif	setup_pdc();	setup_cmdline(cmdline_p);	collect_boot_cpu_data();	do_memory_inventory();  /* probe for physical memory */	parisc_cache_init();	paging_init(); #ifdef CONFIG_PA11	dma_ops_init();#endif 	clear_sched_clock_stable();} /* * Display CPU info for all CPUs. */static void *c_start (struct seq_file *m, loff_t *pos){    	/* Looks like the caller will call repeatedly until we return	 * 0, signaling EOF perhaps.  This could be used to sequence	 * through CPUs for example.  Since we print all cpu info in our	 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)	 * we only allow for one "position".  */	return ((long)*pos < 1) ? (void *)1 : NULL;} static void *c_next (struct seq_file *m, void *v, loff_t *pos){	++*pos;	return c_start(m, pos);} static voidc_stop (struct seq_file *m, void *v){} const struct seq_operations cpuinfo_op = {	.start	= c_start,	.next	= c_next,	.stop	= c_stop,	.show	= show_cpuinfo}; static struct resource central_bus = {	.name	= "Central Bus",	.start	= F_EXTEND(0xfff80000),	.end    = F_EXTEND(0xfffaffff),	.flags	= IORESOURCE_MEM,}; static struct resource local_broadcast = {	.name	= "Local Broadcast",	.start	= F_EXTEND(0xfffb0000),	.end	= F_EXTEND(0xfffdffff),	.flags	= IORESOURCE_MEM,}; static struct resource global_broadcast = {	.name	= "Global Broadcast",	.start	= F_EXTEND(0xfffe0000),	.end	= F_EXTEND(0xffffffff),	.flags	= IORESOURCE_MEM,}; static int __init parisc_init_resources(void){	int result; 	result = request_resource(&iomem_resource, &central_bus);	if (result < 0) {		printk(KERN_ERR 		       "%s: failed to claim %s address space!\n", 		       __FILE__, central_bus.name);		return result;	} 	result = request_resource(&iomem_resource, &local_broadcast);	if (result < 0) {		printk(KERN_ERR 		       "%s: failed to claim %s address space!\n",		       __FILE__, local_broadcast.name);		return result;	} 	result = request_resource(&iomem_resource, &global_broadcast);	if (result < 0) {		printk(KERN_ERR 		       "%s: failed to claim %s address space!\n", 		       __FILE__, global_broadcast.name);		return result;	} 	return 0;} static int __init parisc_init(void){	u32 osid = (OS_ID_LINUX << 16); 	parisc_init_resources();	do_device_inventory();                  /* probe for hardware */ 	parisc_pdc_chassis_init();		/* set up a new led state on systems shipped LED State panel */	pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 	/* tell PDC we're Linux. Nevermind failure. */	pdc_stable_write(0x40, &osid, sizeof(osid));		/* start with known state */	flush_cache_all_local();	flush_tlb_all_local(NULL); 	processor_init();#ifdef CONFIG_SMP	pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",		num_online_cpus(), num_present_cpus(),#else	pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",#endif			boot_cpu_data.cpu_name,			boot_cpu_data.cpu_hz / 1000000,			boot_cpu_data.cpu_hz % 1000000	); #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)	/* Don't serialize TLB flushes if we run on one CPU only. */	if (num_online_cpus() == 1)		pa_serialize_tlb_flushes = 0;#endif 	apply_alternatives_all();	parisc_setup_cache_timing();	return 0;}arch_initcall(parisc_init); void __init start_parisc(void){	int ret, cpunum;	struct pdc_coproc_cfg coproc_cfg; 	/*	 * Check if initial kernel page mapping is sufficient.	 * Print warning if not, because we may access kernel functions and	 * variables which can't be reached yet through the initial mappings.	 * Note that the panic() and printk() functions are not functional	 * yet, so we need to use direct iodc() firmware calls instead.	 */	const char warn1[] = "CRITICAL: Kernel may crash because "			     "KERNEL_INITIAL_ORDER is too small.\n";	if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)		pdc_iodc_print(warn1, sizeof(warn1) - 1); 	/* check QEMU/SeaBIOS marker in PAGE0 */	running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); 	cpunum = smp_processor_id(); 	init_cpu_topology(); 	set_firmware_width_unlocked(); 	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);	if (ret >= 0 && coproc_cfg.ccr_functional) {		mtctl(coproc_cfg.ccr_functional, 10); 		per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;		per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 		asm volatile ("fstd	%fr0,8(%sp)");	} else {		panic("must have an fpu to boot linux");	} 	early_trap_init(); /* initialize checksum of fault_vector */ 	start_kernel();	// not reached}