360 lines
8.6 KiB
C
360 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Initial setup-routines for HP 9000 based hardware.
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*
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* Copyright (C) 1991, 1992, 1995 Linus Torvalds
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* Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
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* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
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* Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
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* Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
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* Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
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*
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* Initial PA-RISC Version: 04-23-1999 by Helge Deller
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*/
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#include <linux/kernel.h>
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#include <linux/initrd.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/seq_file.h>
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#define PCI_DEBUG
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#include <linux/pci.h>
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#undef PCI_DEBUG
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#include <linux/proc_fs.h>
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#include <linux/export.h>
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#include <linux/sched.h>
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#include <linux/sched/clock.h>
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#include <linux/start_kernel.h>
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#include <asm/cacheflush.h>
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#include <asm/processor.h>
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#include <asm/sections.h>
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#include <asm/pdc.h>
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#include <asm/led.h>
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#include <asm/machdep.h> /* for pa7300lc_init() proto */
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#include <asm/pdc_chassis.h>
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#include <asm/io.h>
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#include <asm/setup.h>
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#include <asm/unwind.h>
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#include <asm/smp.h>
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static char __initdata command_line[COMMAND_LINE_SIZE];
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static void __init setup_cmdline(char **cmdline_p)
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{
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extern unsigned int boot_args[];
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char *p;
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*cmdline_p = command_line;
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/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
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if (boot_args[0] < 64)
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return; /* return if called from hpux boot loader */
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/* Collect stuff passed in from the boot loader */
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strscpy(boot_command_line, (char *)__va(boot_args[1]),
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COMMAND_LINE_SIZE);
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/* autodetect console type (if not done by palo yet) */
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p = boot_command_line;
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if (!str_has_prefix(p, "console=") && !strstr(p, " console=")) {
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strlcat(p, " console=", COMMAND_LINE_SIZE);
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if (PAGE0->mem_cons.cl_class == CL_DUPLEX)
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strlcat(p, "ttyS0", COMMAND_LINE_SIZE);
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else
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strlcat(p, "tty0", COMMAND_LINE_SIZE);
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}
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/* default to use early console */
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if (!strstr(p, "earlycon"))
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strlcat(p, " earlycon=pdc", COMMAND_LINE_SIZE);
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#ifdef CONFIG_BLK_DEV_INITRD
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/* did palo pass us a ramdisk? */
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if (boot_args[2] != 0) {
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initrd_start = (unsigned long)__va(boot_args[2]);
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initrd_end = (unsigned long)__va(boot_args[3]);
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}
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#endif
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strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
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}
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#ifdef CONFIG_PA11
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static void __init dma_ops_init(void)
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{
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switch (boot_cpu_data.cpu_type) {
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case pcx:
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/*
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* We've got way too many dependencies on 1.1 semantics
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* to support 1.0 boxes at this point.
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*/
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panic( "PA-RISC Linux currently only supports machines that conform to\n"
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"the PA-RISC 1.1 or 2.0 architecture specification.\n");
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case pcxl2:
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pa7300lc_init();
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break;
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default:
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break;
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}
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}
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#endif
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void __init setup_arch(char **cmdline_p)
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{
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#ifdef CONFIG_64BIT
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extern int parisc_narrow_firmware;
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#endif
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unwind_init();
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init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */
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#ifdef CONFIG_64BIT
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printk(KERN_INFO "The 64-bit Kernel has started...\n");
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#else
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printk(KERN_INFO "The 32-bit Kernel has started...\n");
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#endif
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printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
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(int)(PAGE_SIZE / 1024));
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#ifdef CONFIG_HUGETLB_PAGE
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printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
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1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
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#else
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printk(KERN_CONT "disabled");
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#endif
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printk(KERN_CONT ".\n");
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/*
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* Check if initial kernel page mappings are sufficient.
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* panic early if not, else we may access kernel functions
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* and variables which can't be reached.
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*/
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if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
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panic("KERNEL_INITIAL_ORDER too small!");
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#ifdef CONFIG_64BIT
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if(parisc_narrow_firmware) {
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printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
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}
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#endif
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setup_pdc();
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setup_cmdline(cmdline_p);
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collect_boot_cpu_data();
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do_memory_inventory(); /* probe for physical memory */
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parisc_cache_init();
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paging_init();
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#ifdef CONFIG_CHASSIS_LCD_LED
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/* initialize the LCD/LED after boot_cpu_data is available ! */
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led_init(); /* LCD/LED initialization */
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#endif
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#ifdef CONFIG_PA11
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dma_ops_init();
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#endif
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clear_sched_clock_stable();
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}
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/*
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* Display CPU info for all CPUs.
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*/
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static void *
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c_start (struct seq_file *m, loff_t *pos)
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{
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/* Looks like the caller will call repeatedly until we return
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* 0, signaling EOF perhaps. This could be used to sequence
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* through CPUs for example. Since we print all cpu info in our
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* show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
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* we only allow for one "position". */
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return ((long)*pos < 1) ? (void *)1 : NULL;
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}
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static void *
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c_next (struct seq_file *m, void *v, loff_t *pos)
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{
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++*pos;
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return c_start(m, pos);
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}
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static void
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c_stop (struct seq_file *m, void *v)
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{
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}
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const struct seq_operations cpuinfo_op = {
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.start = c_start,
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.next = c_next,
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.stop = c_stop,
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.show = show_cpuinfo
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};
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static struct resource central_bus = {
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.name = "Central Bus",
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.start = F_EXTEND(0xfff80000),
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.end = F_EXTEND(0xfffaffff),
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.flags = IORESOURCE_MEM,
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};
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static struct resource local_broadcast = {
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.name = "Local Broadcast",
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.start = F_EXTEND(0xfffb0000),
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.end = F_EXTEND(0xfffdffff),
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.flags = IORESOURCE_MEM,
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};
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static struct resource global_broadcast = {
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.name = "Global Broadcast",
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.start = F_EXTEND(0xfffe0000),
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.end = F_EXTEND(0xffffffff),
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.flags = IORESOURCE_MEM,
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};
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static int __init parisc_init_resources(void)
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{
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int result;
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result = request_resource(&iomem_resource, ¢ral_bus);
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if (result < 0) {
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printk(KERN_ERR
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"%s: failed to claim %s address space!\n",
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__FILE__, central_bus.name);
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return result;
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}
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result = request_resource(&iomem_resource, &local_broadcast);
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if (result < 0) {
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printk(KERN_ERR
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"%s: failed to claim %s address space!\n",
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__FILE__, local_broadcast.name);
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return result;
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}
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result = request_resource(&iomem_resource, &global_broadcast);
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if (result < 0) {
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printk(KERN_ERR
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"%s: failed to claim %s address space!\n",
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__FILE__, global_broadcast.name);
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return result;
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}
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return 0;
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}
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static int __init parisc_init(void)
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{
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u32 osid = (OS_ID_LINUX << 16);
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parisc_init_resources();
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do_device_inventory(); /* probe for hardware */
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parisc_pdc_chassis_init();
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/* set up a new led state on systems shipped LED State panel */
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pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
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/* tell PDC we're Linux. Nevermind failure. */
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pdc_stable_write(0x40, &osid, sizeof(osid));
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/* start with known state */
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flush_cache_all_local();
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flush_tlb_all_local(NULL);
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processor_init();
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#ifdef CONFIG_SMP
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pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
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num_online_cpus(), num_present_cpus(),
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#else
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pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
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#endif
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boot_cpu_data.cpu_name,
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boot_cpu_data.cpu_hz / 1000000,
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boot_cpu_data.cpu_hz % 1000000 );
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#if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
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/* Don't serialize TLB flushes if we run on one CPU only. */
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if (num_online_cpus() == 1)
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pa_serialize_tlb_flushes = 0;
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#endif
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apply_alternatives_all();
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parisc_setup_cache_timing();
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/* These are in a non-obvious order, will fix when we have an iotree */
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#if defined(CONFIG_IOSAPIC)
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iosapic_init();
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#endif
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#if defined(CONFIG_IOMMU_SBA)
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sba_init();
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#endif
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#if defined(CONFIG_PCI_LBA)
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lba_init();
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#endif
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/* CCIO before any potential subdevices */
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#if defined(CONFIG_IOMMU_CCIO)
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ccio_init();
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#endif
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/*
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* Need to register Asp & Wax before the EISA adapters for the IRQ
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* regions. EISA must come before PCI to be sure it gets IRQ region
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* 0.
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*/
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#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
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gsc_init();
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#endif
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#ifdef CONFIG_EISA
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parisc_eisa_init();
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#endif
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#if defined(CONFIG_HPPB)
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hppb_init();
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#endif
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#if defined(CONFIG_GSC_DINO)
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dino_init();
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#endif
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#ifdef CONFIG_CHASSIS_LCD_LED
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register_led_regions(); /* register LED port info in procfs */
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#endif
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return 0;
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}
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arch_initcall(parisc_init);
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void __init start_parisc(void)
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{
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int ret, cpunum;
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struct pdc_coproc_cfg coproc_cfg;
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/* check QEMU/SeaBIOS marker in PAGE0 */
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running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
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cpunum = smp_processor_id();
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init_cpu_topology();
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set_firmware_width_unlocked();
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ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
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if (ret >= 0 && coproc_cfg.ccr_functional) {
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mtctl(coproc_cfg.ccr_functional, 10);
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per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
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per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
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asm volatile ("fstd %fr0,8(%sp)");
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} else {
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panic("must have an fpu to boot linux");
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}
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early_trap_init(); /* initialize checksum of fault_vector */
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start_kernel();
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// not reached
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}
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