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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312// 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/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];
static void __init setup_cmdline(char **cmdline_p){ extern unsigned int boot_args[]; char *p;
*cmdline_p = command_line;
/* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ if (boot_args[0] < 64) return; /* return if called from hpux boot loader */
/* Collect stuff passed in from the boot loader */ 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 /* did palo pass us a ramdisk? */ if (boot_args[2] != 0) { 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);}
#ifdef CONFIG_PA11static 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: default: break; }}#endif
void __init setup_arch(char **cmdline_p){ 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");
#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_PA11 dma_ops_init();#endif
clear_sched_clock_stable();}
/* * Display CPU info for all CPUs. */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 voidc_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 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, ¢ral_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;}
static int __init parisc_init(void){ u32 osid = (OS_ID_LINUX << 16);
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(); return 0;}arch_initcall(parisc_init);
void __init start_parisc(void){ int ret, cpunum; struct pdc_coproc_cfg coproc_cfg;
/* * Check if initial kernel page mapping is sufficient. * Print warning if not, because we may access kernel functions and * variables which can't be reached yet through the initial mappings. * Note that the panic() and printk() functions are not functional * yet, so we need to use direct iodc() firmware calls instead. */ const char warn1[] = "CRITICAL: Kernel may crash because " "KERNEL_INITIAL_ORDER is too small.\n"; if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) pdc_iodc_print(warn1, sizeof(warn1) - 1);
/* 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}