| // 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, ¢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; |
| } |
| |
| 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 |
| } |