/* MN10300 Arch-specific initialisation * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct mn10300_cpuinfo boot_cpu_data; static char __initdata cmd_line[COMMAND_LINE_SIZE]; char redboot_command_line[COMMAND_LINE_SIZE] = "console=ttyS0,115200 root=/dev/mtdblock3 rw"; char __initdata redboot_platform_name[COMMAND_LINE_SIZE]; static struct resource code_resource = { .start = 0x100000, .end = 0, .name = "Kernel code", }; static struct resource data_resource = { .start = 0, .end = 0, .name = "Kernel data", }; static unsigned long __initdata phys_memory_base; static unsigned long __initdata phys_memory_end; static unsigned long __initdata memory_end; unsigned long memory_size; struct thread_info *__current_ti = &init_thread_union.thread_info; struct task_struct *__current = &init_task; #define mn10300_known_cpus 5 static const char *const mn10300_cputypes[] = { "am33-1", "am33-2", "am34-1", "am33-3", "am34-2", "unknown" }; /* * Pick out the memory size. We look for mem=size, * where size is "size[KkMm]" */ static int __init early_mem(char *p) { memory_size = memparse(p, &p); if (memory_size == 0) panic("Memory size not known\n"); return 0; } early_param("mem", early_mem); /* * architecture specific setup */ void __init setup_arch(char **cmdline_p) { unsigned long bootmap_size; unsigned long kstart_pfn, start_pfn, free_pfn, end_pfn; cpu_init(); unit_setup(); smp_init_cpus(); /* save unparsed command line copy for /proc/cmdline */ strlcpy(boot_command_line, redboot_command_line, COMMAND_LINE_SIZE); /* populate cmd_line too for later use, preserving boot_command_line */ strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE); *cmdline_p = cmd_line; parse_early_param(); memory_end = (unsigned long) CONFIG_KERNEL_RAM_BASE_ADDRESS + memory_size; if (memory_end > phys_memory_end) memory_end = phys_memory_end; init_mm.start_code = (unsigned long)&_text; init_mm.end_code = (unsigned long) &_etext; init_mm.end_data = (unsigned long) &_edata; init_mm.brk = (unsigned long) &_end; code_resource.start = virt_to_bus(&_text); code_resource.end = virt_to_bus(&_etext)-1; data_resource.start = virt_to_bus(&_etext); data_resource.end = virt_to_bus(&_edata)-1; start_pfn = (CONFIG_KERNEL_RAM_BASE_ADDRESS >> PAGE_SHIFT); kstart_pfn = PFN_UP(__pa(&_text)); free_pfn = PFN_UP(__pa(&_end)); end_pfn = PFN_DOWN(__pa(memory_end)); bootmap_size = init_bootmem_node(&contig_page_data, free_pfn, start_pfn, end_pfn); if (kstart_pfn > start_pfn) free_bootmem(PFN_PHYS(start_pfn), PFN_PHYS(kstart_pfn - start_pfn)); free_bootmem(PFN_PHYS(free_pfn), PFN_PHYS(end_pfn - free_pfn)); /* If interrupt vector table is in main ram, then we need to reserve the page it is occupying. */ if (CONFIG_INTERRUPT_VECTOR_BASE >= CONFIG_KERNEL_RAM_BASE_ADDRESS && CONFIG_INTERRUPT_VECTOR_BASE < memory_end) reserve_bootmem(CONFIG_INTERRUPT_VECTOR_BASE, PAGE_SIZE, BOOTMEM_DEFAULT); reserve_bootmem(PAGE_ALIGN(PFN_PHYS(free_pfn)), bootmap_size, BOOTMEM_DEFAULT); #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif paging_init(); } /* * perform CPU initialisation */ void __init cpu_init(void) { unsigned long cpurev = CPUREV, type; type = (CPUREV & CPUREV_TYPE) >> CPUREV_TYPE_S; if (type > mn10300_known_cpus) type = mn10300_known_cpus; printk(KERN_INFO "Panasonic %s, rev %ld\n", mn10300_cputypes[type], (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S); get_mem_info(&phys_memory_base, &memory_size); phys_memory_end = phys_memory_base + memory_size; fpu_init_state(); } static struct cpu cpu_devices[NR_CPUS]; static int __init topology_init(void) { int i; for_each_present_cpu(i) register_cpu(&cpu_devices[i], i); return 0; } subsys_initcall(topology_init); /* * Get CPU information for use by the procfs. */ static int show_cpuinfo(struct seq_file *m, void *v) { #ifdef CONFIG_SMP struct mn10300_cpuinfo *c = v; unsigned long cpu_id = c - cpu_data; unsigned long cpurev = c->type, type, icachesz, dcachesz; #else /* CONFIG_SMP */ unsigned long cpu_id = 0; unsigned long cpurev = CPUREV, type, icachesz, dcachesz; #endif /* CONFIG_SMP */ #ifdef CONFIG_SMP if (!cpu_online(cpu_id)) return 0; #endif type = (cpurev & CPUREV_TYPE) >> CPUREV_TYPE_S; if (type > mn10300_known_cpus) type = mn10300_known_cpus; icachesz = ((cpurev & CPUREV_ICWAY ) >> CPUREV_ICWAY_S) * ((cpurev & CPUREV_ICSIZE) >> CPUREV_ICSIZE_S) * 1024; dcachesz = ((cpurev & CPUREV_DCWAY ) >> CPUREV_DCWAY_S) * ((cpurev & CPUREV_DCSIZE) >> CPUREV_DCSIZE_S) * 1024; seq_printf(m, "processor : %ld\n" "vendor_id : " PROCESSOR_VENDOR_NAME "\n" "cpu core : %s\n" "cpu rev : %lu\n" "model name : " PROCESSOR_MODEL_NAME "\n" "icache size: %lu\n" "dcache size: %lu\n", cpu_id, mn10300_cputypes[type], (cpurev & CPUREV_REVISION) >> CPUREV_REVISION_S, icachesz, dcachesz ); seq_printf(m, "ioclk speed: %lu.%02luMHz\n" "bogomips : %lu.%02lu\n\n", MN10300_IOCLK / 1000000, (MN10300_IOCLK / 10000) % 100, #ifdef CONFIG_SMP c->loops_per_jiffy / (500000 / HZ), (c->loops_per_jiffy / (5000 / HZ)) % 100 #else /* CONFIG_SMP */ loops_per_jiffy / (500000 / HZ), (loops_per_jiffy / (5000 / HZ)) % 100 #endif /* CONFIG_SMP */ ); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { return *pos < NR_CPUS ? cpu_data + *pos : 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, }; ] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'sound/oss/opl3_hw.h')