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-rw-r--r--arch/parisc/kernel/setup.c413
1 files changed, 413 insertions, 0 deletions
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
new file mode 100644
index 000000000..e320bae50
--- /dev/null
+++ b/arch/parisc/kernel/setup.c
@@ -0,0 +1,413 @@
+// 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[];
+
+ /* 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 {
+ strlcpy(boot_command_line, (char *)__va(boot_args[1]),
+ 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
+ }
+
+ strcpy(command_line, boot_command_line);
+ *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!");
+
+ pdc_console_init();
+
+#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 %saddress 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
+}
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