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// SPDX-License-Identifier: GPL-2.0/* *  linux/arch/sparc64/kernel/setup.c * *  Copyright (C) 1995,1996  David S. Miller (davem@caip.rutgers.edu) *  Copyright (C) 1997       Jakub Jelinek (jj@sunsite.mff.cuni.cz) */ #include <linux/errno.h>#include <linux/sched.h>#include <linux/kernel.h>#include <linux/mm.h>#include <linux/stddef.h>#include <linux/unistd.h>#include <linux/ptrace.h>#include <asm/smp.h>#include <linux/user.h>#include <linux/delay.h>#include <linux/fs.h>#include <linux/seq_file.h>#include <linux/syscalls.h>#include <linux/kdev_t.h>#include <linux/major.h>#include <linux/string.h>#include <linux/init.h>#include <linux/inet.h>#include <linux/console.h>#include <linux/root_dev.h>#include <linux/interrupt.h>#include <linux/cpu.h>#include <linux/initrd.h>#include <linux/module.h>#include <linux/start_kernel.h>#include <linux/memblock.h>#include <uapi/linux/mount.h> #include <asm/io.h>#include <asm/processor.h>#include <asm/oplib.h>#include <asm/page.h>#include <asm/idprom.h>#include <asm/head.h>#include <asm/starfire.h>#include <asm/mmu_context.h>#include <asm/timer.h>#include <asm/sections.h>#include <asm/setup.h>#include <asm/mmu.h>#include <asm/ns87303.h>#include <asm/btext.h>#include <asm/elf.h>#include <asm/mdesc.h>#include <asm/cacheflush.h>#include <asm/dma.h>#include <asm/irq.h> #ifdef CONFIG_IP_PNP#include <net/ipconfig.h>#endif #include "entry.h"#include "kernel.h" /* Used to synchronize accesses to NatSemi SUPER I/O chip configure * operations in asm/ns87303.h */DEFINE_SPINLOCK(ns87303_lock);EXPORT_SYMBOL(ns87303_lock); static voidprom_console_write(struct console *con, const char *s, unsigned int n){	prom_write(s, n);} /* Exported for mm/init.c:paging_init. */unsigned long cmdline_memory_size = 0; static struct console prom_early_console = {	.name =		"earlyprom",	.write =	prom_console_write,	.flags =	CON_PRINTBUFFER | CON_BOOT | CON_ANYTIME,	.index =	-1,}; /* * Process kernel command line switches that are specific to the * SPARC or that require special low-level processing. */static void __init process_switch(char c){	switch (c) {	case 'd':	case 's':		break;	case 'h':		prom_printf("boot_flags_init: Halt!\n");		prom_halt();		break;	case 'p':		prom_early_console.flags &= ~CON_BOOT;		break;	case 'P':		/* Force UltraSPARC-III P-Cache on. */		if (tlb_type != cheetah) {			printk("BOOT: Ignoring P-Cache force option.\n");			break;		}		cheetah_pcache_forced_on = 1;		add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);		cheetah_enable_pcache();		break; 	default:		printk("Unknown boot switch (-%c)\n", c);		break;	}} static void __init boot_flags_init(char *commands){	while (*commands) {		/* Move to the start of the next "argument". */		while (*commands == ' ')			commands++; 		/* Process any command switches, otherwise skip it. */		if (*commands == '\0')			break;		if (*commands == '-') {			commands++;			while (*commands && *commands != ' ')				process_switch(*commands++);			continue;		}		if (!strncmp(commands, "mem=", 4))			cmdline_memory_size = memparse(commands + 4, &commands); 		while (*commands && *commands != ' ')			commands++;	}} extern unsigned short root_flags;extern unsigned short root_dev;extern unsigned short ram_flags;#define RAMDISK_IMAGE_START_MASK	0x07FF#define RAMDISK_PROMPT_FLAG		0x8000#define RAMDISK_LOAD_FLAG		0x4000 extern int root_mountflags; char reboot_command[COMMAND_LINE_SIZE]; static void __init per_cpu_patch(void){	struct cpuid_patch_entry *p;	unsigned long ver;	int is_jbus; 	if (tlb_type == spitfire && !this_is_starfire)		return; 	is_jbus = 0;	if (tlb_type != hypervisor) {		__asm__ ("rdpr %%ver, %0" : "=r" (ver));		is_jbus = ((ver >> 32UL) == __JALAPENO_ID ||			   (ver >> 32UL) == __SERRANO_ID);	} 	p = &__cpuid_patch;	while (p < &__cpuid_patch_end) {		unsigned long addr = p->addr;		unsigned int *insns; 		switch (tlb_type) {		case spitfire:			insns = &p->starfire[0];			break;		case cheetah:		case cheetah_plus:			if (is_jbus)				insns = &p->cheetah_jbus[0];			else				insns = &p->cheetah_safari[0];			break;		case hypervisor:			insns = &p->sun4v[0];			break;		default:			prom_printf("Unknown cpu type, halting.\n");			prom_halt();		} 		*(unsigned int *) (addr +  0) = insns[0];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  0)); 		*(unsigned int *) (addr +  4) = insns[1];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  4)); 		*(unsigned int *) (addr +  8) = insns[2];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  8)); 		*(unsigned int *) (addr + 12) = insns[3];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr + 12)); 		p++;	}} void sun4v_patch_1insn_range(struct sun4v_1insn_patch_entry *start,			     struct sun4v_1insn_patch_entry *end){	while (start < end) {		unsigned long addr = start->addr; 		*(unsigned int *) (addr +  0) = start->insn;		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  0)); 		start++;	}} void sun4v_patch_2insn_range(struct sun4v_2insn_patch_entry *start,			     struct sun4v_2insn_patch_entry *end){	while (start < end) {		unsigned long addr = start->addr; 		*(unsigned int *) (addr +  0) = start->insns[0];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  0)); 		*(unsigned int *) (addr +  4) = start->insns[1];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  4)); 		start++;	}} void sun_m7_patch_2insn_range(struct sun4v_2insn_patch_entry *start,			     struct sun4v_2insn_patch_entry *end){	while (start < end) {		unsigned long addr = start->addr; 		*(unsigned int *) (addr +  0) = start->insns[0];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  0)); 		*(unsigned int *) (addr +  4) = start->insns[1];		wmb();		__asm__ __volatile__("flush	%0" : : "r" (addr +  4)); 		start++;	}} static void __init sun4v_patch(void){	extern void sun4v_hvapi_init(void); 	if (tlb_type != hypervisor)		return; 	sun4v_patch_1insn_range(&__sun4v_1insn_patch,				&__sun4v_1insn_patch_end); 	sun4v_patch_2insn_range(&__sun4v_2insn_patch,				&__sun4v_2insn_patch_end); 	switch (sun4v_chip_type) {	case SUN4V_CHIP_SPARC_M7:	case SUN4V_CHIP_SPARC_M8:	case SUN4V_CHIP_SPARC_SN:		sun4v_patch_1insn_range(&__sun_m7_1insn_patch,					&__sun_m7_1insn_patch_end);		sun_m7_patch_2insn_range(&__sun_m7_2insn_patch,					 &__sun_m7_2insn_patch_end);		break;	default:		break;	} 	if (sun4v_chip_type != SUN4V_CHIP_NIAGARA1) {		sun4v_patch_1insn_range(&__fast_win_ctrl_1insn_patch,					&__fast_win_ctrl_1insn_patch_end);	} 	sun4v_hvapi_init();} static void __init popc_patch(void){	struct popc_3insn_patch_entry *p3;	struct popc_6insn_patch_entry *p6; 	p3 = &__popc_3insn_patch;	while (p3 < &__popc_3insn_patch_end) {		unsigned long i, addr = p3->addr; 		for (i = 0; i < 3; i++) {			*(unsigned int *) (addr +  (i * 4)) = p3->insns[i];			wmb();			__asm__ __volatile__("flush	%0"					     : : "r" (addr +  (i * 4)));		} 		p3++;	} 	p6 = &__popc_6insn_patch;	while (p6 < &__popc_6insn_patch_end) {		unsigned long i, addr = p6->addr; 		for (i = 0; i < 6; i++) {			*(unsigned int *) (addr +  (i * 4)) = p6->insns[i];			wmb();			__asm__ __volatile__("flush	%0"					     : : "r" (addr +  (i * 4)));		} 		p6++;	}} static void __init pause_patch(void){	struct pause_patch_entry *p; 	p = &__pause_3insn_patch;	while (p < &__pause_3insn_patch_end) {		unsigned long i, addr = p->addr; 		for (i = 0; i < 3; i++) {			*(unsigned int *) (addr +  (i * 4)) = p->insns[i];			wmb();			__asm__ __volatile__("flush	%0"					     : : "r" (addr +  (i * 4)));		} 		p++;	}} void __init start_early_boot(void){	int cpu; 	check_if_starfire();	per_cpu_patch();	sun4v_patch();	smp_init_cpu_poke(); 	cpu = hard_smp_processor_id();	if (cpu >= NR_CPUS) {		prom_printf("Serious problem, boot cpu id (%d) >= NR_CPUS (%d)\n",			    cpu, NR_CPUS);		prom_halt();	}	current_thread_info()->cpu = cpu; 	time_init_early();	prom_init_report();	start_kernel();} /* On Ultra, we support all of the v8 capabilities. */unsigned long sparc64_elf_hwcap = (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR |				   HWCAP_SPARC_SWAP | HWCAP_SPARC_MULDIV |				   HWCAP_SPARC_V9);EXPORT_SYMBOL(sparc64_elf_hwcap); static const char *hwcaps[] = {	"flush", "stbar", "swap", "muldiv", "v9",	"ultra3", "blkinit", "n2", 	/* These strings are as they appear in the machine description	 * 'hwcap-list' property for cpu nodes.	 */	"mul32", "div32", "fsmuld", "v8plus", "popc", "vis", "vis2",	"ASIBlkInit", "fmaf", "vis3", "hpc", "random", "trans", "fjfmau",	"ima", "cspare", "pause", "cbcond", NULL /*reserved for crypto */,	"adp",}; static const char *crypto_hwcaps[] = {	"aes", "des", "kasumi", "camellia", "md5", "sha1", "sha256",	"sha512", "mpmul", "montmul", "montsqr", "crc32c",}; void cpucap_info(struct seq_file *m){	unsigned long caps = sparc64_elf_hwcap;	int i, printed = 0; 	seq_puts(m, "cpucaps\t\t: ");	for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {		unsigned long bit = 1UL << i;		if (hwcaps[i] && (caps & bit)) {			seq_printf(m, "%s%s",				   printed ? "," : "", hwcaps[i]);			printed++;		}	}	if (caps & HWCAP_SPARC_CRYPTO) {		unsigned long cfr; 		__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));		for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {			unsigned long bit = 1UL << i;			if (cfr & bit) {				seq_printf(m, "%s%s",					   printed ? "," : "", crypto_hwcaps[i]);				printed++;			}		}	}	seq_putc(m, '\n');} static void __init report_one_hwcap(int *printed, const char *name){	if ((*printed) == 0)		printk(KERN_INFO "CPU CAPS: [");	printk(KERN_CONT "%s%s",	       (*printed) ? "," : "", name);	if (++(*printed) == 8) {		printk(KERN_CONT "]\n");		*printed = 0;	}} static void __init report_crypto_hwcaps(int *printed){	unsigned long cfr;	int i; 	__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr)); 	for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {		unsigned long bit = 1UL << i;		if (cfr & bit)			report_one_hwcap(printed, crypto_hwcaps[i]);	}} static void __init report_hwcaps(unsigned long caps){	int i, printed = 0; 	for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {		unsigned long bit = 1UL << i;		if (hwcaps[i] && (caps & bit))			report_one_hwcap(&printed, hwcaps[i]);	}	if (caps & HWCAP_SPARC_CRYPTO)		report_crypto_hwcaps(&printed);	if (printed != 0)		printk(KERN_CONT "]\n");} static unsigned long __init mdesc_cpu_hwcap_list(void){	struct mdesc_handle *hp;	unsigned long caps = 0;	const char *prop;	int len;	u64 pn; 	hp = mdesc_grab();	if (!hp)		return 0; 	pn = mdesc_node_by_name(hp, MDESC_NODE_NULL, "cpu");	if (pn == MDESC_NODE_NULL)		goto out; 	prop = mdesc_get_property(hp, pn, "hwcap-list", &len);	if (!prop)		goto out; 	while (len) {		int i, plen; 		for (i = 0; i < ARRAY_SIZE(hwcaps); i++) {			unsigned long bit = 1UL << i; 			if (hwcaps[i] && !strcmp(prop, hwcaps[i])) {				caps |= bit;				break;			}		}		for (i = 0; i < ARRAY_SIZE(crypto_hwcaps); i++) {

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