Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 426 insertions, 0 deletions

diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
new file mode 100644
index 000000000..375f38d6e
--- /dev/null
+++ b/arch/parisc/kernel/setup.c
@@ -0,0 +1,426 @@
+// 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/machdep.h>	/* for pa7300lc_init() proto */
+#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];
+
+/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
+struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
+struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
+struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
+
+void __init setup_cmdline(char **cmdline_p)
+{
+	extern unsigned int boot_args[];
+	char *p;
+
+	/* Collect stuff passed in from the boot loader */
+
+	/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
+	if (boot_args[0] < 64) {
+		/* called from hpux boot loader */
+		boot_command_line[0] = '\0';
+	} else {
+		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
+		if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
+		{
+		    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);
+	*cmdline_p = command_line;
+}
+
+#ifdef CONFIG_PA11
+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:
+		pa7300lc_init();
+		break;
+	default:
+		break;
+	}
+}
+#endif
+
+extern void collect_boot_cpu_data(void);
+
+void __init setup_arch(char **cmdline_p)
+{
+#ifdef CONFIG_64BIT
+	extern int parisc_narrow_firmware;
+#endif
+	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");
+
+	/*
+	 * Check if initial kernel page mappings are sufficient.
+	 * panic early if not, else we may access kernel functions
+	 * and variables which can't be reached.
+	 */
+	if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
+		panic("KERNEL_INITIAL_ORDER too small!");
+
+#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_CHASSIS_LCD_LED
+	/* initialize the LCD/LED after boot_cpu_data is available ! */
+	led_init();		/* LCD/LED initialization */
+#endif
+
+#ifdef CONFIG_PA11
+	dma_ops_init();
+#endif
+
+	clear_sched_clock_stable();
+}
+
+/*
+ * Display CPU info for all CPUs.
+ * for parisc this is in processor.c
+ */
+extern int show_cpuinfo (struct seq_file *m, void *v);
+
+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 void
+c_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 void __init parisc_proc_mkdir(void)
+{
+	/*
+	** Can't call proc_mkdir() until after proc_root_init() has been
+	** called by start_kernel(). In other words, this code can't
+	** live in arch/.../setup.c because start_parisc() calls
+	** start_kernel().
+	*/
+	switch (boot_cpu_data.cpu_type) {
+	case pcxl:
+	case pcxl2:
+		if (NULL == proc_gsc_root)
+		{
+			proc_gsc_root = proc_mkdir("bus/gsc", NULL);
+		}
+		break;
+        case pcxt_:
+        case pcxu:
+        case pcxu_:
+        case pcxw:
+        case pcxw_:
+        case pcxw2:
+                if (NULL == proc_runway_root)
+                {
+                        proc_runway_root = proc_mkdir("bus/runway", NULL);
+                }
+                break;
+	case mako:
+	case mako2:
+                if (NULL == proc_mckinley_root)
+                {
+                        proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
+                }
+                break;
+	default:
+		/* FIXME: this was added to prevent the compiler 
+		 * complaining about missing pcx, pcxs and pcxt
+		 * I'm assuming they have neither gsc nor runway */
+		break;
+	}
+}
+
+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;
+}
+
+extern void gsc_init(void);
+extern void processor_init(void);
+extern void ccio_init(void);
+extern void hppb_init(void);
+extern void dino_init(void);
+extern void iosapic_init(void);
+extern void lba_init(void);
+extern void sba_init(void);
+extern void eisa_init(void);
+
+static int __init parisc_init(void)
+{
+	u32 osid = (OS_ID_LINUX << 16);
+
+	parisc_proc_mkdir();
+	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();
+
+	/* These are in a non-obvious order, will fix when we have an iotree */
+#if defined(CONFIG_IOSAPIC)
+	iosapic_init();
+#endif
+#if defined(CONFIG_IOMMU_SBA)
+	sba_init();
+#endif
+#if defined(CONFIG_PCI_LBA)
+	lba_init();
+#endif
+
+	/* CCIO before any potential subdevices */
+#if defined(CONFIG_IOMMU_CCIO)
+	ccio_init();
+#endif
+
+	/*
+	 * Need to register Asp & Wax before the EISA adapters for the IRQ
+	 * regions.  EISA must come before PCI to be sure it gets IRQ region
+	 * 0.
+	 */
+#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
+	gsc_init();
+#endif
+#ifdef CONFIG_EISA
+	eisa_init();
+#endif
+
+#if defined(CONFIG_HPPB)
+	hppb_init();
+#endif
+
+#if defined(CONFIG_GSC_DINO)
+	dino_init();
+#endif
+
+#ifdef CONFIG_CHASSIS_LCD_LED
+	register_led_regions();	/* register LED port info in procfs */
+#endif
+
+	return 0;
+}
+arch_initcall(parisc_init);
+
+void __init start_parisc(void)
+{
+	extern void early_trap_init(void);
+
+	int ret, cpunum;
+	struct pdc_coproc_cfg coproc_cfg;
+
+	/* 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
+}