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413 lines
9.9 KiB
413 lines
9.9 KiB
// 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 <[email protected]> |
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* Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) |
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* Modifications copyright 2000 Martin K. Petersen <[email protected]> |
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* Modifications copyright 2000 Philipp Rumpf <[email protected]> |
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* Modifications copyright 2001 Ryan Bradetich <[email protected]> |
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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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/* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ |
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struct proc_dir_entry * proc_runway_root __read_mostly = NULL; |
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struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; |
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struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; |
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void __init setup_cmdline(char **cmdline_p) |
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{ |
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extern unsigned int boot_args[]; |
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/* Collect stuff passed in from the boot loader */ |
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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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/* called from hpux boot loader */ |
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boot_command_line[0] = '\0'; |
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} else { |
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strlcpy(boot_command_line, (char *)__va(boot_args[1]), |
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COMMAND_LINE_SIZE); |
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#ifdef CONFIG_BLK_DEV_INITRD |
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if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ |
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{ |
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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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} |
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strcpy(command_line, boot_command_line); |
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*cmdline_p = command_line; |
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} |
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#ifdef CONFIG_PA11 |
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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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extern void collect_boot_cpu_data(void); |
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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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pdc_console_init(); |
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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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* for parisc this is in processor.c |
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*/ |
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extern int show_cpuinfo (struct seq_file *m, void *v); |
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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 void __init parisc_proc_mkdir(void) |
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{ |
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/* |
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** Can't call proc_mkdir() until after proc_root_init() has been |
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** called by start_kernel(). In other words, this code can't |
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** live in arch/.../setup.c because start_parisc() calls |
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** start_kernel(). |
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*/ |
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switch (boot_cpu_data.cpu_type) { |
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case pcxl: |
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case pcxl2: |
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if (NULL == proc_gsc_root) |
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{ |
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proc_gsc_root = proc_mkdir("bus/gsc", NULL); |
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} |
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break; |
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case pcxt_: |
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case pcxu: |
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case pcxu_: |
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case pcxw: |
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case pcxw_: |
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case pcxw2: |
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if (NULL == proc_runway_root) |
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{ |
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proc_runway_root = proc_mkdir("bus/runway", NULL); |
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} |
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break; |
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case mako: |
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case mako2: |
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if (NULL == proc_mckinley_root) |
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{ |
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proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); |
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} |
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break; |
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default: |
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/* FIXME: this was added to prevent the compiler |
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* complaining about missing pcx, pcxs and pcxt |
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* I'm assuming they have neither gsc nor runway */ |
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break; |
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} |
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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 %saddress 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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extern void gsc_init(void); |
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extern void processor_init(void); |
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extern void ccio_init(void); |
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extern void hppb_init(void); |
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extern void dino_init(void); |
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extern void iosapic_init(void); |
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extern void lba_init(void); |
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extern void sba_init(void); |
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extern void eisa_init(void); |
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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_proc_mkdir(); |
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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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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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extern void early_trap_init(void); |
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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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