[mirror_ubuntu-eoan-kernel.git] / arch / powerpc / platforms / powermac / setup.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Powermac setup and early boot code plus other random bits.
 *
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Adapted for Power Macintosh by Paul Mackerras
 *    Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
 *
 *  Derived from "arch/alpha/kernel/setup.c"
 *    Copyright (C) 1995 Linus Torvalds
 *
 *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
 */

/*
 * bootup setup stuff..
 */

#include <linux/init.h>
#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 <linux/export.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/bitops.h>
#include <linux/suspend.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

#include <asm/reg.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/cputable.h>
#include <asm/btext.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/iommu.h>
#include <asm/smu.h>
#include <asm/pmc.h>
#include <asm/udbg.h>

#include "pmac.h"

#undef SHOW_GATWICK_IRQS

int ppc_override_l2cr = 0;
int ppc_override_l2cr_value;
int has_l2cache = 0;

int pmac_newworld;

static int current_root_goodness = -1;

extern struct machdep_calls pmac_md;

#define DEFAULT_ROOT_DEVICE Root_SDA1	/* sda1 - slightly silly choice */

#ifdef CONFIG_PPC64
int sccdbg;
#endif

sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
EXPORT_SYMBOL(sys_ctrler);

static void pmac_show_cpuinfo(struct seq_file *m)
{
	struct device_node *np;
	const char *pp;
	int plen;
	int mbmodel;
	unsigned int mbflags;
	char* mbname;

	mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
				    PMAC_MB_INFO_MODEL, 0);
	mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
				    PMAC_MB_INFO_FLAGS, 0);
	if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
			      (long) &mbname) != 0)
		mbname = "Unknown";

	/* find motherboard type */
	seq_printf(m, "machine\t\t: ");
	np = of_find_node_by_path("/");
	if (np != NULL) {
		pp = of_get_property(np, "model", NULL);
		if (pp != NULL)
			seq_printf(m, "%s\n", pp);
		else
			seq_printf(m, "PowerMac\n");
		pp = of_get_property(np, "compatible", &plen);
		if (pp != NULL) {
			seq_printf(m, "motherboard\t:");
			while (plen > 0) {
				int l = strlen(pp) + 1;
				seq_printf(m, " %s", pp);
				plen -= l;
				pp += l;
			}
			seq_printf(m, "\n");
		}
		of_node_put(np);
	} else
		seq_printf(m, "PowerMac\n");

	/* print parsed model */
	seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
	seq_printf(m, "pmac flags\t: %08x\n", mbflags);

	/* find l2 cache info */
	np = of_find_node_by_name(NULL, "l2-cache");
	if (np == NULL)
		np = of_find_node_by_type(NULL, "cache");
	if (np != NULL) {
		const unsigned int *ic =
			of_get_property(np, "i-cache-size", NULL);
		const unsigned int *dc =
			of_get_property(np, "d-cache-size", NULL);
		seq_printf(m, "L2 cache\t:");
		has_l2cache = 1;
		if (of_get_property(np, "cache-unified", NULL) && dc) {
			seq_printf(m, " %dK unified", *dc / 1024);
		} else {
			if (ic)
				seq_printf(m, " %dK instruction", *ic / 1024);
			if (dc)
				seq_printf(m, "%s %dK data",
					   (ic? " +": ""), *dc / 1024);
		}
		pp = of_get_property(np, "ram-type", NULL);
		if (pp)
			seq_printf(m, " %s", pp);
		seq_printf(m, "\n");
		of_node_put(np);
	}

	/* Indicate newworld/oldworld */
	seq_printf(m, "pmac-generation\t: %s\n",
		   pmac_newworld ? "NewWorld" : "OldWorld");
}

#ifndef CONFIG_ADB_CUDA
int find_via_cuda(void)
{
	struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");

	if (!dn)
		return 0;
	of_node_put(dn);
	printk("WARNING ! Your machine is CUDA-based but your kernel\n");
	printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
	return 0;
}
#endif

#ifndef CONFIG_ADB_PMU
int find_via_pmu(void)
{
	struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");

	if (!dn)
		return 0;
	of_node_put(dn);
	printk("WARNING ! Your machine is PMU-based but your kernel\n");
	printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
	return 0;
}
#endif

#ifndef CONFIG_PMAC_SMU
int smu_init(void)
{
	/* should check and warn if SMU is present */
	return 0;
}
#endif

#ifdef CONFIG_PPC32
static volatile u32 *sysctrl_regs;

static void __init ohare_init(void)
{
	struct device_node *dn;

	/* this area has the CPU identification register
	   and some registers used by smp boards */
	sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);

	/*
	 * Turn on the L2 cache.
	 * We assume that we have a PSX memory controller iff
	 * we have an ohare I/O controller.
	 */
	dn = of_find_node_by_name(NULL, "ohare");
	if (dn) {
		of_node_put(dn);
		if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
			if (sysctrl_regs[4] & 0x10)
				sysctrl_regs[4] |= 0x04000020;
			else
				sysctrl_regs[4] |= 0x04000000;
			if(has_l2cache)
				printk(KERN_INFO "Level 2 cache enabled\n");
		}
	}
}

static void __init l2cr_init(void)
{
	/* Checks "l2cr-value" property in the registry */
	if (cpu_has_feature(CPU_FTR_L2CR)) {
		struct device_node *np;

		for_each_of_cpu_node(np) {
			const unsigned int *l2cr =
				of_get_property(np, "l2cr-value", NULL);
			if (l2cr) {
				ppc_override_l2cr = 1;
				ppc_override_l2cr_value = *l2cr;
				_set_L2CR(0);
				_set_L2CR(ppc_override_l2cr_value);
			}
			of_node_put(np);
			break;
		}
	}

	if (ppc_override_l2cr)
		printk(KERN_INFO "L2CR overridden (0x%x), "
		       "backside cache is %s\n",
		       ppc_override_l2cr_value,
		       (ppc_override_l2cr_value & 0x80000000)
				? "enabled" : "disabled");
}
#endif

static void __init pmac_setup_arch(void)
{
	struct device_node *cpu, *ic;
	const int *fp;
	unsigned long pvr;

	pvr = PVR_VER(mfspr(SPRN_PVR));

	/* Set loops_per_jiffy to a half-way reasonable value,
	   for use until calibrate_delay gets called. */
	loops_per_jiffy = 50000000 / HZ;

	for_each_of_cpu_node(cpu) {
		fp = of_get_property(cpu, "clock-frequency", NULL);
		if (fp != NULL) {
			if (pvr >= 0x30 && pvr < 0x80)
				/* PPC970 etc. */
				loops_per_jiffy = *fp / (3 * HZ);
			else if (pvr == 4 || pvr >= 8)
				/* 604, G3, G4 etc. */
				loops_per_jiffy = *fp / HZ;
			else
				/* 601, 603, etc. */
				loops_per_jiffy = *fp / (2 * HZ);
			of_node_put(cpu);
			break;
		}
	}

	/* See if newworld or oldworld */
	ic = of_find_node_with_property(NULL, "interrupt-controller");
	if (ic) {
		pmac_newworld = 1;
		of_node_put(ic);
	}

	/* Lookup PCI hosts */
	pmac_pci_init();

#ifdef CONFIG_PPC32
	ohare_init();
	l2cr_init();
#endif /* CONFIG_PPC32 */

	find_via_cuda();
	find_via_pmu();
	smu_init();

#if IS_ENABLED(CONFIG_NVRAM)
	pmac_nvram_init();
#endif
#ifdef CONFIG_PPC32
#ifdef CONFIG_BLK_DEV_INITRD
	if (initrd_start)
		ROOT_DEV = Root_RAM0;
	else
#endif
		ROOT_DEV = DEFAULT_ROOT_DEVICE;
#endif

#ifdef CONFIG_ADB
	if (strstr(boot_command_line, "adb_sync")) {
		extern int __adb_probe_sync;
		__adb_probe_sync = 1;
	}
#endif /* CONFIG_ADB */
}

#ifdef CONFIG_SCSI
void note_scsi_host(struct device_node *node, void *host)
{
}
EXPORT_SYMBOL(note_scsi_host);
#endif

static int initializing = 1;

static int pmac_late_init(void)
{
	initializing = 0;
	return 0;
}
machine_late_initcall(powermac, pmac_late_init);

void note_bootable_part(dev_t dev, int part, int goodness);
/*
 * This is __ref because we check for "initializing" before
 * touching any of the __init sensitive things and "initializing"
 * will be false after __init time. This can't be __init because it
 * can be called whenever a disk is first accessed.
 */
void __ref note_bootable_part(dev_t dev, int part, int goodness)
{
	char *p;

	if (!initializing)
		return;
	if ((goodness <= current_root_goodness) &&
	    ROOT_DEV != DEFAULT_ROOT_DEVICE)
		return;
	p = strstr(boot_command_line, "root=");
	if (p != NULL && (p == boot_command_line || p[-1] == ' '))
		return;

	ROOT_DEV = dev + part;
	current_root_goodness = goodness;
}

#ifdef CONFIG_ADB_CUDA
static void __noreturn cuda_restart(void)
{
	struct adb_request req;

	cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
	for (;;)
		cuda_poll();
}

static void __noreturn cuda_shutdown(void)
{
	struct adb_request req;

	cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
	for (;;)
		cuda_poll();
}

#else
#define cuda_restart()
#define cuda_shutdown()
#endif

#ifndef CONFIG_ADB_PMU
#define pmu_restart()
#define pmu_shutdown()
#endif

#ifndef CONFIG_PMAC_SMU
#define smu_restart()
#define smu_shutdown()
#endif

static void __noreturn pmac_restart(char *cmd)
{
	switch (sys_ctrler) {
	case SYS_CTRLER_CUDA:
		cuda_restart();
		break;
	case SYS_CTRLER_PMU:
		pmu_restart();
		break;
	case SYS_CTRLER_SMU:
		smu_restart();
		break;
	default: ;
	}
	while (1) ;
}

static void __noreturn pmac_power_off(void)
{
	switch (sys_ctrler) {
	case SYS_CTRLER_CUDA:
		cuda_shutdown();
		break;
	case SYS_CTRLER_PMU:
		pmu_shutdown();
		break;
	case SYS_CTRLER_SMU:
		smu_shutdown();
		break;
	default: ;
	}
	while (1) ;
}

static void __noreturn
pmac_halt(void)
{
	pmac_power_off();
}

/* 
 * Early initialization.
 */
static void __init pmac_init(void)
{
	/* Enable early btext debug if requested */
	if (strstr(boot_command_line, "btextdbg")) {
		udbg_adb_init_early();
		register_early_udbg_console();
	}

	/* Probe motherboard chipset */
	pmac_feature_init();

	/* Initialize debug stuff */
	udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
	udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));

#ifdef CONFIG_PPC64
	iommu_init_early_dart(&pmac_pci_controller_ops);
#endif

	/* SMP Init has to be done early as we need to patch up
	 * cpu_possible_mask before interrupt stacks are allocated
	 * or kaboom...
	 */
#ifdef CONFIG_SMP
	pmac_setup_smp();
#endif
}

static int __init pmac_declare_of_platform_devices(void)
{
	struct device_node *np;

	np = of_find_node_by_name(NULL, "valkyrie");
	if (np) {
		of_platform_device_create(np, "valkyrie", NULL);
		of_node_put(np);
	}
	np = of_find_node_by_name(NULL, "platinum");
	if (np) {
		of_platform_device_create(np, "platinum", NULL);
		of_node_put(np);
	}
        np = of_find_node_by_type(NULL, "smu");
        if (np) {
		of_platform_device_create(np, "smu", NULL);
		of_node_put(np);
	}
	np = of_find_node_by_type(NULL, "fcu");
	if (np == NULL) {
		/* Some machines have strangely broken device-tree */
		np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
	}
	if (np) {
		of_platform_device_create(np, "temperature", NULL);
		of_node_put(np);
	}

	return 0;
}
machine_device_initcall(powermac, pmac_declare_of_platform_devices);

#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
/*
 * This is called very early, as part of console_init() (typically just after
 * time_init()). This function is respondible for trying to find a good
 * default console on serial ports. It tries to match the open firmware
 * default output with one of the available serial console drivers.
 */
static int __init check_pmac_serial_console(void)
{
	struct device_node *prom_stdout = NULL;
	int offset = 0;
	const char *name;
#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
	char *devname = "ttyS";
#else
	char *devname = "ttyPZ";
#endif

	pr_debug(" -> check_pmac_serial_console()\n");

	/* The user has requested a console so this is already set up. */
	if (strstr(boot_command_line, "console=")) {
		pr_debug(" console was specified !\n");
		return -EBUSY;
	}

	if (!of_chosen) {
		pr_debug(" of_chosen is NULL !\n");
		return -ENODEV;
	}

	/* We are getting a weird phandle from OF ... */
	/* ... So use the full path instead */
	name = of_get_property(of_chosen, "linux,stdout-path", NULL);
	if (name == NULL) {
		pr_debug(" no linux,stdout-path !\n");
		return -ENODEV;
	}
	prom_stdout = of_find_node_by_path(name);
	if (!prom_stdout) {
		pr_debug(" can't find stdout package %s !\n", name);
		return -ENODEV;
	}
	pr_debug("stdout is %pOF\n", prom_stdout);

	if (of_node_name_eq(prom_stdout, "ch-a"))
		offset = 0;
	else if (of_node_name_eq(prom_stdout, "ch-b"))
		offset = 1;
	else
		goto not_found;
	of_node_put(prom_stdout);

	pr_debug("Found serial console at %s%d\n", devname, offset);

	return add_preferred_console(devname, offset, NULL);

 not_found:
	pr_debug("No preferred console found !\n");
	of_node_put(prom_stdout);
	return -ENODEV;
}
console_initcall(check_pmac_serial_console);

#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */

/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init pmac_probe(void)
{
	if (!of_machine_is_compatible("Power Macintosh") &&
	    !of_machine_is_compatible("MacRISC"))
		return 0;

#ifdef CONFIG_PPC32
	/* isa_io_base gets set in pmac_pci_init */
	ISA_DMA_THRESHOLD = ~0L;
	DMA_MODE_READ = 1;
	DMA_MODE_WRITE = 2;
#endif /* CONFIG_PPC32 */

	pm_power_off = pmac_power_off;

	pmac_init();

	return 1;
}

define_machine(powermac) {
	.name			= "PowerMac",
	.probe			= pmac_probe,
	.setup_arch		= pmac_setup_arch,
	.show_cpuinfo		= pmac_show_cpuinfo,
	.init_IRQ		= pmac_pic_init,
	.get_irq		= NULL,	/* changed later */
	.pci_irq_fixup		= pmac_pci_irq_fixup,
	.restart		= pmac_restart,
	.halt			= pmac_halt,
	.time_init		= pmac_time_init,
	.get_boot_time		= pmac_get_boot_time,
	.set_rtc_time		= pmac_set_rtc_time,
	.get_rtc_time		= pmac_get_rtc_time,
	.calibrate_decr		= pmac_calibrate_decr,
	.feature_call		= pmac_do_feature_call,
	.progress		= udbg_progress,
#ifdef CONFIG_PPC64
	.power_save		= power4_idle,
	.enable_pmcs		= power4_enable_pmcs,
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC32
	.pcibios_after_init	= pmac_pcibios_after_init,
	.phys_mem_access_prot	= pci_phys_mem_access_prot,
#endif
};
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
14cf11af	2	/*
35499c01	3	* Powermac setup and early boot code plus other random bits.
14cf11af PM	4	*
	5	* PowerPC version
	6	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	7	*
	8	* Adapted for Power Macintosh by Paul Mackerras
35499c01	9	* Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
14cf11af PM	10	*
	11	* Derived from "arch/alpha/kernel/setup.c"
	12	* Copyright (C) 1995 Linus Torvalds
	13	*
	14	* Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
14cf11af PM	15	*/
	16
	17	/*
	18	* bootup setup stuff..
	19	*/
	20
14cf11af PM	21	#include <linux/init.h>
	22	#include <linux/errno.h>
	23	#include <linux/sched.h>
	24	#include <linux/kernel.h>
	25	#include <linux/mm.h>
	26	#include <linux/stddef.h>
	27	#include <linux/unistd.h>
	28	#include <linux/ptrace.h>
66b15db6	29	#include <linux/export.h>
14cf11af	30	#include <linux/user.h>
14cf11af PM	31	#include <linux/tty.h>
	32	#include <linux/string.h>
	33	#include <linux/delay.h>
	34	#include <linux/ioport.h>
	35	#include <linux/major.h>
	36	#include <linux/initrd.h>
	37	#include <linux/vt_kern.h>
	38	#include <linux/console.h>
14cf11af PM	39	#include <linux/pci.h>
	40	#include <linux/adb.h>
	41	#include <linux/cuda.h>
	42	#include <linux/pmu.h>
	43	#include <linux/irq.h>
	44	#include <linux/seq_file.h>
	45	#include <linux/root_dev.h>
	46	#include <linux/bitops.h>
	47	#include <linux/suspend.h>
5f867dc7 JL	48	#include <linux/of_device.h>
5f867dc7 JL	49	#include <linux/of_platform.h>
14cf11af PM	50
	51	#include <asm/reg.h>
	52	#include <asm/sections.h>
	53	#include <asm/prom.h>
14cf11af PM	54	#include <asm/pgtable.h>
	55	#include <asm/io.h>
	56	#include <asm/pci-bridge.h>
	57	#include <asm/ohare.h>
	58	#include <asm/mediabay.h>
	59	#include <asm/machdep.h>
	60	#include <asm/dma.h>
14cf11af PM	61	#include <asm/cputable.h>
	62	#include <asm/btext.h>
	63	#include <asm/pmac_feature.h>
	64	#include <asm/time.h>
14cf11af	65	#include <asm/mmu_context.h>
35499c01 PM	66	#include <asm/iommu.h>
	67	#include <asm/smu.h>
	68	#include <asm/pmc.h>
51d3082f	69	#include <asm/udbg.h>
14cf11af	70
3c3f42d6	71	#include "pmac.h"
14cf11af PM	72
	73	#undef SHOW_GATWICK_IRQS
	74
14cf11af PM	75	int ppc_override_l2cr = 0;
	76	int ppc_override_l2cr_value;
	77	int has_l2cache = 0;
	78
d2515c80	79	int pmac_newworld;
9b6b563c	80
14cf11af PM	81	static int current_root_goodness = -1;
14cf11af PM	82
35499c01	83	extern struct machdep_calls pmac_md;
14cf11af PM	84
	85	#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
	86
35499c01	87	#ifdef CONFIG_PPC64
35499c01	88	int sccdbg;
14cf11af PM	89	#endif
	90
	91	sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
35499c01 PM	92	EXPORT_SYMBOL(sys_ctrler);
35499c01 PM	93
0dd194d0	94	static void pmac_show_cpuinfo(struct seq_file *m)
14cf11af PM	95	{
14cf11af PM	96	struct device_node *np;
018a3d1d	97	const char *pp;
14cf11af	98	int plen;
0dd194d0 PM	99	int mbmodel;
0dd194d0 PM	100	unsigned int mbflags;
14cf11af PM	101	char* mbname;
14cf11af PM	102
0dd194d0 PM	103	mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
	104	PMAC_MB_INFO_MODEL, 0);
	105	mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
	106	PMAC_MB_INFO_FLAGS, 0);
	107	if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
	108	(long) &mbname) != 0)
14cf11af PM	109	mbname = "Unknown";
	110
	111	/* find motherboard type */
	112	seq_printf(m, "machine\t\t: ");
0dd194d0	113	np = of_find_node_by_path("/");
14cf11af	114	if (np != NULL) {
e2eb6392	115	pp = of_get_property(np, "model", NULL);
14cf11af PM	116	if (pp != NULL)
	117	seq_printf(m, "%s\n", pp);
	118	else
	119	seq_printf(m, "PowerMac\n");
e2eb6392	120	pp = of_get_property(np, "compatible", &plen);
14cf11af PM	121	if (pp != NULL) {
	122	seq_printf(m, "motherboard\t:");
	123	while (plen > 0) {
	124	int l = strlen(pp) + 1;
	125	seq_printf(m, " %s", pp);
	126	plen -= l;
	127	pp += l;
	128	}
	129	seq_printf(m, "\n");
	130	}
0dd194d0	131	of_node_put(np);
14cf11af PM	132	} else
	133	seq_printf(m, "PowerMac\n");
	134
	135	/* print parsed model */
	136	seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
	137	seq_printf(m, "pmac flags\t: %08x\n", mbflags);
	138
	139	/* find l2 cache info */
0dd194d0 PM	140	np = of_find_node_by_name(NULL, "l2-cache");
	141	if (np == NULL)
	142	np = of_find_node_by_type(NULL, "cache");
	143	if (np != NULL) {
e2eb6392 SR	144	const unsigned int *ic =
	145	of_get_property(np, "i-cache-size", NULL);
	146	const unsigned int *dc =
	147	of_get_property(np, "d-cache-size", NULL);
14cf11af PM	148	seq_printf(m, "L2 cache\t:");
14cf11af PM	149	has_l2cache = 1;
d8731527	150	if (of_get_property(np, "cache-unified", NULL) && dc) {
14cf11af PM	151	seq_printf(m, " %dK unified", *dc / 1024);
	152	} else {
	153	if (ic)
	154	seq_printf(m, " %dK instruction", *ic / 1024);
	155	if (dc)
	156	seq_printf(m, "%s %dK data",
	157	(ic? " +": ""), *dc / 1024);
	158	}
e2eb6392	159	pp = of_get_property(np, "ram-type", NULL);
14cf11af PM	160	if (pp)
	161	seq_printf(m, " %s", pp);
	162	seq_printf(m, "\n");
0dd194d0	163	of_node_put(np);
14cf11af PM	164	}
	165
	166	/* Indicate newworld/oldworld */
	167	seq_printf(m, "pmac-generation\t: %s\n",
	168	pmac_newworld ? "NewWorld" : "OldWorld");
14cf11af PM	169	}
14cf11af PM	170
35499c01 PM	171	#ifndef CONFIG_ADB_CUDA
	172	int find_via_cuda(void)
	173	{
30686ba6 SR	174	struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
	175
	176	if (!dn)
35499c01	177	return 0;
30686ba6	178	of_node_put(dn);
35499c01 PM	179	printk("WARNING ! Your machine is CUDA-based but your kernel\n");
	180	printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
	181	return 0;
	182	}
	183	#endif
14cf11af	184
35499c01 PM	185	#ifndef CONFIG_ADB_PMU
35499c01 PM	186	int find_via_pmu(void)
14cf11af	187	{
30686ba6 SR	188	struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
	189
	190	if (!dn)
35499c01	191	return 0;
30686ba6	192	of_node_put(dn);
35499c01 PM	193	printk("WARNING ! Your machine is PMU-based but your kernel\n");
35499c01 PM	194	printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
a575b807	195	return 0;
35499c01 PM	196	}
35499c01 PM	197	#endif
14cf11af	198
35499c01 PM	199	#ifndef CONFIG_PMAC_SMU
	200	int smu_init(void)
	201	{
	202	/* should check and warn if SMU is present */
	203	return 0;
	204	}
	205	#endif
14cf11af	206
35499c01 PM	207	#ifdef CONFIG_PPC32
35499c01 PM	208	static volatile u32 *sysctrl_regs;
14cf11af	209
35499c01 PM	210	static void __init ohare_init(void)
35499c01 PM	211	{
30686ba6 SR	212	struct device_node *dn;
30686ba6 SR	213
14cf11af PM	214	/* this area has the CPU identification register
	215	and some registers used by smp boards */
	216	sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
14cf11af	217
35499c01 PM	218	/*
	219	* Turn on the L2 cache.
	220	* We assume that we have a PSX memory controller iff
	221	* we have an ohare I/O controller.
	222	*/
30686ba6 SR	223	dn = of_find_node_by_name(NULL, "ohare");
	224	if (dn) {
	225	of_node_put(dn);
35499c01 PM	226	if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
	227	if (sysctrl_regs[4] & 0x10)
	228	sysctrl_regs[4] \|= 0x04000020;
	229	else
	230	sysctrl_regs[4] \|= 0x04000000;
	231	if(has_l2cache)
	232	printk(KERN_INFO "Level 2 cache enabled\n");
	233	}
	234	}
	235	}
14cf11af	236
35499c01 PM	237	static void __init l2cr_init(void)
35499c01 PM	238	{
14cf11af PM	239	/* Checks "l2cr-value" property in the registry */
14cf11af PM	240	if (cpu_has_feature(CPU_FTR_L2CR)) {
a94fe366 RH	241	struct device_node *np;
	242
	243	for_each_of_cpu_node(np) {
018a3d1d	244	const unsigned int *l2cr =
e2eb6392	245	of_get_property(np, "l2cr-value", NULL);
d8731527	246	if (l2cr) {
14cf11af PM	247	ppc_override_l2cr = 1;
	248	ppc_override_l2cr_value = *l2cr;
	249	_set_L2CR(0);
	250	_set_L2CR(ppc_override_l2cr_value);
	251	}
1658ab66	252	of_node_put(np);
a94fe366	253	break;
14cf11af PM	254	}
	255	}
	256
	257	if (ppc_override_l2cr)
35499c01 PM	258	printk(KERN_INFO "L2CR overridden (0x%x), "
	259	"backside cache is %s\n",
	260	ppc_override_l2cr_value,
	261	(ppc_override_l2cr_value & 0x80000000)
14cf11af	262	? "enabled" : "disabled");
35499c01 PM	263	}
	264	#endif
	265
ff38e7c8	266	static void __init pmac_setup_arch(void)
35499c01	267	{
a575b807	268	struct device_node cpu, ic;
018a3d1d	269	const int *fp;
35499c01 PM	270	unsigned long pvr;
	271
	272	pvr = PVR_VER(mfspr(SPRN_PVR));
	273
	274	/* Set loops_per_jiffy to a half-way reasonable value,
	275	for use until calibrate_delay gets called. */
	276	loops_per_jiffy = 50000000 / HZ;
a94fe366 RH	277
a94fe366 RH	278	for_each_of_cpu_node(cpu) {
e2eb6392	279	fp = of_get_property(cpu, "clock-frequency", NULL);
35499c01 PM	280	if (fp != NULL) {
	281	if (pvr >= 0x30 && pvr < 0x80)
	282	/* PPC970 etc. */
	283	loops_per_jiffy = fp / (3 HZ);
	284	else if (pvr == 4 \|\| pvr >= 8)
	285	/* 604, G3, G4 etc. */
	286	loops_per_jiffy = *fp / HZ;
	287	else
	288	/* 601, 603, etc. */
	289	loops_per_jiffy = fp / (2 HZ);
a94fe366 RH	290	of_node_put(cpu);
a94fe366 RH	291	break;
35499c01	292	}
35499c01 PM	293	}
35499c01 PM	294
a575b807	295	/* See if newworld or oldworld */
22059a90	296	ic = of_find_node_with_property(NULL, "interrupt-controller");
d2515c80 OH	297	if (ic) {
d2515c80 OH	298	pmac_newworld = 1;
a575b807	299	of_node_put(ic);
d2515c80	300	}
a575b807	301
35499c01 PM	302	/* Lookup PCI hosts */
	303	pmac_pci_init();
	304
	305	#ifdef CONFIG_PPC32
	306	ohare_init();
	307	l2cr_init();
	308	#endif /* CONFIG_PPC32 */
	309
14cf11af	310	find_via_cuda();
14cf11af	311	find_via_pmu();
35499c01 PM	312	smu_init();
35499c01 PM	313
20e07af7	314	#if IS_ENABLED(CONFIG_NVRAM)
14cf11af PM	315	pmac_nvram_init();
14cf11af PM	316	#endif
35499c01	317	#ifdef CONFIG_PPC32
14cf11af PM	318	#ifdef CONFIG_BLK_DEV_INITRD
	319	if (initrd_start)
	320	ROOT_DEV = Root_RAM0;
	321	else
	322	#endif
	323	ROOT_DEV = DEFAULT_ROOT_DEVICE;
35499c01	324	#endif
14cf11af	325
e8222502	326	#ifdef CONFIG_ADB
3e47d147	327	if (strstr(boot_command_line, "adb_sync")) {
e8222502 BH	328	extern int __adb_probe_sync;
	329	__adb_probe_sync = 1;
	330	}
	331	#endif /* CONFIG_ADB */
14cf11af PM	332	}
14cf11af PM	333
14cf11af	334	#ifdef CONFIG_SCSI
405861a0	335	void note_scsi_host(struct device_node node, void host)
14cf11af	336	{
14cf11af	337	}
9b6b563c	338	EXPORT_SYMBOL(note_scsi_host);
14cf11af PM	339	#endif
14cf11af PM	340
35499c01 PM	341	static int initializing = 1;
35499c01 PM	342
14cf11af PM	343	static int pmac_late_init(void)
	344	{
	345	initializing = 0;
14cf11af PM	346	return 0;
14cf11af PM	347	}
d518b717	348	machine_late_initcall(powermac, pmac_late_init);
14cf11af	349
f72cf3f1	350	void note_bootable_part(dev_t dev, int part, int goodness);
d7418031	351	/*
bd721ea7	352	* This is __ref because we check for "initializing" before
d7418031 SR	353	* touching any of the __init sensitive things and "initializing"
	354	* will be false after __init time. This can't be __init because it
	355	* can be called whenever a disk is first accessed.
	356	*/
bd721ea7	357	void __ref note_bootable_part(dev_t dev, int part, int goodness)
14cf11af	358	{
14cf11af PM	359	char *p;
	360
	361	if (!initializing)
	362	return;
	363	if ((goodness <= current_root_goodness) &&
	364	ROOT_DEV != DEFAULT_ROOT_DEVICE)
	365	return;
b8757b21 ABL	366	p = strstr(boot_command_line, "root=");
b8757b21 ABL	367	if (p != NULL && (p == boot_command_line \|\| p[-1] == ' '))
14cf11af PM	368	return;
14cf11af PM	369
6ee0d9f7 PM	370	ROOT_DEV = dev + part;
6ee0d9f7 PM	371	current_root_goodness = goodness;
14cf11af PM	372	}
14cf11af PM	373
14cf11af	374	#ifdef CONFIG_ADB_CUDA
95ec77c0	375	static void __noreturn cuda_restart(void)
35499c01	376	{
14cf11af	377	struct adb_request req;
14cf11af	378
35499c01 PM	379	cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
	380	for (;;)
	381	cuda_poll();
	382	}
	383
95ec77c0	384	static void __noreturn cuda_shutdown(void)
35499c01 PM	385	{
	386	struct adb_request req;
	387
	388	cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
	389	for (;;)
	390	cuda_poll();
	391	}
	392
	393	#else
	394	#define cuda_restart()
	395	#define cuda_shutdown()
	396	#endif
	397
	398	#ifndef CONFIG_ADB_PMU
	399	#define pmu_restart()
	400	#define pmu_shutdown()
	401	#endif
	402
	403	#ifndef CONFIG_PMAC_SMU
	404	#define smu_restart()
	405	#define smu_shutdown()
	406	#endif
	407
95ec77c0	408	static void __noreturn pmac_restart(char *cmd)
35499c01	409	{
14cf11af	410	switch (sys_ctrler) {
14cf11af	411	case SYS_CTRLER_CUDA:
35499c01	412	cuda_restart();
14cf11af	413	break;
14cf11af PM	414	case SYS_CTRLER_PMU:
	415	pmu_restart();
	416	break;
35499c01 PM	417	case SYS_CTRLER_SMU:
	418	smu_restart();
	419	break;
14cf11af PM	420	default: ;
14cf11af PM	421	}
95ec77c0	422	while (1) ;
14cf11af PM	423	}
14cf11af PM	424
95ec77c0	425	static void __noreturn pmac_power_off(void)
14cf11af	426	{
14cf11af	427	switch (sys_ctrler) {
14cf11af	428	case SYS_CTRLER_CUDA:
35499c01	429	cuda_shutdown();
14cf11af	430	break;
14cf11af PM	431	case SYS_CTRLER_PMU:
	432	pmu_shutdown();
	433	break;
35499c01 PM	434	case SYS_CTRLER_SMU:
	435	smu_shutdown();
	436	break;
14cf11af PM	437	default: ;
14cf11af PM	438	}
95ec77c0	439	while (1) ;
14cf11af PM	440	}
14cf11af PM	441
95ec77c0	442	static void __noreturn
14cf11af PM	443	pmac_halt(void)
	444	{
	445	pmac_power_off();
	446	}
	447
35499c01 PM	448	/*
	449	* Early initialization.
	450	*/
f2d57694	451	static void __init pmac_init(void)
35499c01	452	{
51d3082f	453	/* Enable early btext debug if requested */
3e47d147	454	if (strstr(boot_command_line, "btextdbg")) {
51d3082f BH	455	udbg_adb_init_early();
51d3082f BH	456	register_early_udbg_console();
35499c01 PM	457	}
35499c01 PM	458
51d3082f BH	459	/* Probe motherboard chipset */
	460	pmac_feature_init();
	461
51d3082f	462	/* Initialize debug stuff */
3e47d147 AB	463	udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
3e47d147 AB	464	udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));
51d3082f BH	465
51d3082f BH	466	#ifdef CONFIG_PPC64
e63f26d3	467	iommu_init_early_dart(&pmac_pci_controller_ops);
35499c01	468	#endif
7ccbe504 BH	469
7ccbe504 BH	470	/* SMP Init has to be done early as we need to patch up
828a6986	471	* cpu_possible_mask before interrupt stacks are allocated
7ccbe504 BH	472	* or kaboom...
	473	*/
	474	#ifdef CONFIG_SMP
	475	pmac_setup_smp();
	476	#endif
35499c01 PM	477	}
35499c01 PM	478
35499c01	479	static int __init pmac_declare_of_platform_devices(void)
14cf11af	480	{
a28d3af2	481	struct device_node *np;
14cf11af	482
730745a5	483	np = of_find_node_by_name(NULL, "valkyrie");
3631cb83	484	if (np) {
35499c01	485	of_platform_device_create(np, "valkyrie", NULL);
3631cb83 JL	486	of_node_put(np);
3631cb83 JL	487	}
730745a5	488	np = of_find_node_by_name(NULL, "platinum");
3631cb83	489	if (np) {
35499c01	490	of_platform_device_create(np, "platinum", NULL);
3631cb83 JL	491	of_node_put(np);
3631cb83 JL	492	}
35499c01 PM	493	np = of_find_node_by_type(NULL, "smu");
	494	if (np) {
	495	of_platform_device_create(np, "smu", NULL);
	496	of_node_put(np);
	497	}
98b14d6b MZ	498	np = of_find_node_by_type(NULL, "fcu");
	499	if (np == NULL) {
	500	/* Some machines have strangely broken device-tree */
	501	np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
	502	}
	503	if (np) {
	504	of_platform_device_create(np, "temperature", NULL);
	505	of_node_put(np);
	506	}
14cf11af PM	507
	508	return 0;
	509	}
d518b717	510	machine_device_initcall(powermac, pmac_declare_of_platform_devices);
35499c01	511
025d7917 BH	512	#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
	513	/*
	514	* This is called very early, as part of console_init() (typically just after
	515	* time_init()). This function is respondible for trying to find a good
	516	* default console on serial ports. It tries to match the open firmware
	517	* default output with one of the available serial console drivers.
	518	*/
	519	static int __init check_pmac_serial_console(void)
	520	{
	521	struct device_node *prom_stdout = NULL;
	522	int offset = 0;
	523	const char *name;
	524	#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
	525	char *devname = "ttyS";
	526	#else
	527	char *devname = "ttyPZ";
	528	#endif
	529
	530	pr_debug(" -> check_pmac_serial_console()\n");
	531
	532	/* The user has requested a console so this is already set up. */
	533	if (strstr(boot_command_line, "console=")) {
	534	pr_debug(" console was specified !\n");
	535	return -EBUSY;
	536	}
	537
	538	if (!of_chosen) {
	539	pr_debug(" of_chosen is NULL !\n");
	540	return -ENODEV;
	541	}
	542
	543	/* We are getting a weird phandle from OF ... */
	544	/* ... So use the full path instead */
	545	name = of_get_property(of_chosen, "linux,stdout-path", NULL);
	546	if (name == NULL) {
	547	pr_debug(" no linux,stdout-path !\n");
	548	return -ENODEV;
	549	}
	550	prom_stdout = of_find_node_by_path(name);
	551	if (!prom_stdout) {
	552	pr_debug(" can't find stdout package %s !\n", name);
	553	return -ENODEV;
	554	}
b7c670d6	555	pr_debug("stdout is %pOF\n", prom_stdout);
025d7917	556
2c8e65b5	557	if (of_node_name_eq(prom_stdout, "ch-a"))
025d7917	558	offset = 0;
2c8e65b5	559	else if (of_node_name_eq(prom_stdout, "ch-b"))
025d7917 BH	560	offset = 1;
	561	else
	562	goto not_found;
	563	of_node_put(prom_stdout);
	564
	565	pr_debug("Found serial console at %s%d\n", devname, offset);
	566
	567	return add_preferred_console(devname, offset, NULL);
	568
	569	not_found:
	570	pr_debug("No preferred console found !\n");
	571	of_node_put(prom_stdout);
	572	return -ENODEV;
	573	}
	574	console_initcall(check_pmac_serial_console);
	575
	576	#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
	577
35499c01 PM	578	/*
	579	* Called very early, MMU is off, device-tree isn't unflattened
	580	*/
e8222502	581	static int __init pmac_probe(void)
35499c01	582	{
406b0b6a BH	583	if (!of_machine_is_compatible("Power Macintosh") &&
	584	!of_machine_is_compatible("MacRISC"))
	585	return 0;
35499c01	586
e8222502 BH	587	#ifdef CONFIG_PPC32
e8222502 BH	588	/* isa_io_base gets set in pmac_pci_init */
e8222502 BH	589	ISA_DMA_THRESHOLD = ~0L;
	590	DMA_MODE_READ = 1;
	591	DMA_MODE_WRITE = 2;
e8222502 BH	592	#endif /* CONFIG_PPC32 */
e8222502 BH	593
9178ba29 AG	594	pm_power_off = pmac_power_off;
9178ba29 AG	595
f2d57694 BH	596	pmac_init();
f2d57694 BH	597
35499c01 PM	598	return 1;
	599	}
	600
e8222502 BH	601	define_machine(powermac) {
e8222502 BH	602	.name = "PowerMac",
35499c01 PM	603	.probe = pmac_probe,
35499c01 PM	604	.setup_arch = pmac_setup_arch,
35499c01	605	.show_cpuinfo = pmac_show_cpuinfo,
35499c01	606	.init_IRQ = pmac_pic_init,
cc5d0189	607	.get_irq = NULL, /* changed later */
f90bb153	608	.pci_irq_fixup = pmac_pci_irq_fixup,
35499c01	609	.restart = pmac_restart,
35499c01 PM	610	.halt = pmac_halt,
	611	.time_init = pmac_time_init,
	612	.get_boot_time = pmac_get_boot_time,
	613	.set_rtc_time = pmac_set_rtc_time,
	614	.get_rtc_time = pmac_get_rtc_time,
	615	.calibrate_decr = pmac_calibrate_decr,
	616	.feature_call = pmac_do_feature_call,
be6b8439	617	.progress = udbg_progress,
35499c01	618	#ifdef CONFIG_PPC64
a0652fc9	619	.power_save = power4_idle,
35499c01	620	.enable_pmcs = power4_enable_pmcs,
3d1229d6	621	#endif /* CONFIG_PPC64 */
35499c01	622	#ifdef CONFIG_PPC32
35499c01 PM	623	.pcibios_after_init = pmac_pcibios_after_init,
	624	.phys_mem_access_prot = pci_phys_mem_access_prot,
	625	#endif
	626	};