| /* |
| * Common boot and setup code for both 32-bit and 64-bit. |
| * Extracted from arch/powerpc/kernel/setup_64.c. |
| * |
| * Copyright (C) 2001 PPC64 Team, IBM Corp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #undef DEBUG |
| |
| #include <linux/module.h> |
| #include <linux/string.h> |
| #include <linux/sched.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/reboot.h> |
| #include <linux/delay.h> |
| #include <linux/initrd.h> |
| #include <linux/platform_device.h> |
| #include <linux/seq_file.h> |
| #include <linux/ioport.h> |
| #include <linux/console.h> |
| #include <linux/screen_info.h> |
| #include <linux/root_dev.h> |
| #include <linux/notifier.h> |
| #include <linux/cpu.h> |
| #include <linux/unistd.h> |
| #include <linux/serial.h> |
| #include <linux/serial_8250.h> |
| #include <linux/debugfs.h> |
| #include <linux/percpu.h> |
| #include <linux/memblock.h> |
| #include <linux/of_platform.h> |
| #include <asm/io.h> |
| #include <asm/paca.h> |
| #include <asm/prom.h> |
| #include <asm/processor.h> |
| #include <asm/vdso_datapage.h> |
| #include <asm/pgtable.h> |
| #include <asm/smp.h> |
| #include <asm/elf.h> |
| #include <asm/machdep.h> |
| #include <asm/time.h> |
| #include <asm/cputable.h> |
| #include <asm/sections.h> |
| #include <asm/firmware.h> |
| #include <asm/btext.h> |
| #include <asm/nvram.h> |
| #include <asm/setup.h> |
| #include <asm/system.h> |
| #include <asm/rtas.h> |
| #include <asm/iommu.h> |
| #include <asm/serial.h> |
| #include <asm/cache.h> |
| #include <asm/page.h> |
| #include <asm/mmu.h> |
| #include <asm/xmon.h> |
| #include <asm/cputhreads.h> |
| #include <mm/mmu_decl.h> |
| |
| #include "setup.h" |
| |
| #ifdef DEBUG |
| #include <asm/udbg.h> |
| #define DBG(fmt...) udbg_printf(fmt) |
| #else |
| #define DBG(fmt...) |
| #endif |
| |
| /* The main machine-dep calls structure |
| */ |
| struct machdep_calls ppc_md; |
| EXPORT_SYMBOL(ppc_md); |
| struct machdep_calls *machine_id; |
| EXPORT_SYMBOL(machine_id); |
| |
| unsigned long klimit = (unsigned long) _end; |
| |
| char cmd_line[COMMAND_LINE_SIZE]; |
| |
| /* |
| * This still seems to be needed... -- paulus |
| */ |
| struct screen_info screen_info = { |
| .orig_x = 0, |
| .orig_y = 25, |
| .orig_video_cols = 80, |
| .orig_video_lines = 25, |
| .orig_video_isVGA = 1, |
| .orig_video_points = 16 |
| }; |
| |
| /* Variables required to store legacy IO irq routing */ |
| int of_i8042_kbd_irq; |
| EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); |
| int of_i8042_aux_irq; |
| EXPORT_SYMBOL_GPL(of_i8042_aux_irq); |
| |
| #ifdef __DO_IRQ_CANON |
| /* XXX should go elsewhere eventually */ |
| int ppc_do_canonicalize_irqs; |
| EXPORT_SYMBOL(ppc_do_canonicalize_irqs); |
| #endif |
| |
| /* also used by kexec */ |
| void machine_shutdown(void) |
| { |
| if (ppc_md.machine_shutdown) |
| ppc_md.machine_shutdown(); |
| } |
| |
| void machine_restart(char *cmd) |
| { |
| machine_shutdown(); |
| if (ppc_md.restart) |
| ppc_md.restart(cmd); |
| #ifdef CONFIG_SMP |
| smp_send_stop(); |
| #endif |
| printk(KERN_EMERG "System Halted, OK to turn off power\n"); |
| local_irq_disable(); |
| while (1) ; |
| } |
| |
| void machine_power_off(void) |
| { |
| machine_shutdown(); |
| if (ppc_md.power_off) |
| ppc_md.power_off(); |
| #ifdef CONFIG_SMP |
| smp_send_stop(); |
| #endif |
| printk(KERN_EMERG "System Halted, OK to turn off power\n"); |
| local_irq_disable(); |
| while (1) ; |
| } |
| /* Used by the G5 thermal driver */ |
| EXPORT_SYMBOL_GPL(machine_power_off); |
| |
| void (*pm_power_off)(void) = machine_power_off; |
| EXPORT_SYMBOL_GPL(pm_power_off); |
| |
| void machine_halt(void) |
| { |
| machine_shutdown(); |
| if (ppc_md.halt) |
| ppc_md.halt(); |
| #ifdef CONFIG_SMP |
| smp_send_stop(); |
| #endif |
| printk(KERN_EMERG "System Halted, OK to turn off power\n"); |
| local_irq_disable(); |
| while (1) ; |
| } |
| |
| |
| #ifdef CONFIG_TAU |
| extern u32 cpu_temp(unsigned long cpu); |
| extern u32 cpu_temp_both(unsigned long cpu); |
| #endif /* CONFIG_TAU */ |
| |
| #ifdef CONFIG_SMP |
| DEFINE_PER_CPU(unsigned int, cpu_pvr); |
| #endif |
| |
| static void show_cpuinfo_summary(struct seq_file *m) |
| { |
| struct device_node *root; |
| const char *model = NULL; |
| #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) |
| unsigned long bogosum = 0; |
| int i; |
| for_each_online_cpu(i) |
| bogosum += loops_per_jiffy; |
| seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
| bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); |
| #endif /* CONFIG_SMP && CONFIG_PPC32 */ |
| seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); |
| if (ppc_md.name) |
| seq_printf(m, "platform\t: %s\n", ppc_md.name); |
| root = of_find_node_by_path("/"); |
| if (root) |
| model = of_get_property(root, "model", NULL); |
| if (model) |
| seq_printf(m, "model\t\t: %s\n", model); |
| of_node_put(root); |
| |
| if (ppc_md.show_cpuinfo != NULL) |
| ppc_md.show_cpuinfo(m); |
| |
| #ifdef CONFIG_PPC32 |
| /* Display the amount of memory */ |
| seq_printf(m, "Memory\t\t: %d MB\n", |
| (unsigned int)(total_memory / (1024 * 1024))); |
| #endif |
| } |
| |
| static int show_cpuinfo(struct seq_file *m, void *v) |
| { |
| unsigned long cpu_id = (unsigned long)v - 1; |
| unsigned int pvr; |
| unsigned short maj; |
| unsigned short min; |
| |
| /* We only show online cpus: disable preempt (overzealous, I |
| * knew) to prevent cpu going down. */ |
| preempt_disable(); |
| if (!cpu_online(cpu_id)) { |
| preempt_enable(); |
| return 0; |
| } |
| |
| #ifdef CONFIG_SMP |
| pvr = per_cpu(cpu_pvr, cpu_id); |
| #else |
| pvr = mfspr(SPRN_PVR); |
| #endif |
| maj = (pvr >> 8) & 0xFF; |
| min = pvr & 0xFF; |
| |
| seq_printf(m, "processor\t: %lu\n", cpu_id); |
| seq_printf(m, "cpu\t\t: "); |
| |
| if (cur_cpu_spec->pvr_mask) |
| seq_printf(m, "%s", cur_cpu_spec->cpu_name); |
| else |
| seq_printf(m, "unknown (%08x)", pvr); |
| |
| #ifdef CONFIG_ALTIVEC |
| if (cpu_has_feature(CPU_FTR_ALTIVEC)) |
| seq_printf(m, ", altivec supported"); |
| #endif /* CONFIG_ALTIVEC */ |
| |
| seq_printf(m, "\n"); |
| |
| #ifdef CONFIG_TAU |
| if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { |
| #ifdef CONFIG_TAU_AVERAGE |
| /* more straightforward, but potentially misleading */ |
| seq_printf(m, "temperature \t: %u C (uncalibrated)\n", |
| cpu_temp(cpu_id)); |
| #else |
| /* show the actual temp sensor range */ |
| u32 temp; |
| temp = cpu_temp_both(cpu_id); |
| seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
| temp & 0xff, temp >> 16); |
| #endif |
| } |
| #endif /* CONFIG_TAU */ |
| |
| /* |
| * Assume here that all clock rates are the same in a |
| * smp system. -- Cort |
| */ |
| if (ppc_proc_freq) |
| seq_printf(m, "clock\t\t: %lu.%06luMHz\n", |
| ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); |
| |
| if (ppc_md.show_percpuinfo != NULL) |
| ppc_md.show_percpuinfo(m, cpu_id); |
| |
| /* If we are a Freescale core do a simple check so |
| * we dont have to keep adding cases in the future */ |
| if (PVR_VER(pvr) & 0x8000) { |
| switch (PVR_VER(pvr)) { |
| case 0x8000: /* 7441/7450/7451, Voyager */ |
| case 0x8001: /* 7445/7455, Apollo 6 */ |
| case 0x8002: /* 7447/7457, Apollo 7 */ |
| case 0x8003: /* 7447A, Apollo 7 PM */ |
| case 0x8004: /* 7448, Apollo 8 */ |
| case 0x800c: /* 7410, Nitro */ |
| maj = ((pvr >> 8) & 0xF); |
| min = PVR_MIN(pvr); |
| break; |
| default: /* e500/book-e */ |
| maj = PVR_MAJ(pvr); |
| min = PVR_MIN(pvr); |
| break; |
| } |
| } else { |
| switch (PVR_VER(pvr)) { |
| case 0x0020: /* 403 family */ |
| maj = PVR_MAJ(pvr) + 1; |
| min = PVR_MIN(pvr); |
| break; |
| case 0x1008: /* 740P/750P ?? */ |
| maj = ((pvr >> 8) & 0xFF) - 1; |
| min = pvr & 0xFF; |
| break; |
| default: |
| maj = (pvr >> 8) & 0xFF; |
| min = pvr & 0xFF; |
| break; |
| } |
| } |
| |
| seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", |
| maj, min, PVR_VER(pvr), PVR_REV(pvr)); |
| |
| #ifdef CONFIG_PPC32 |
| seq_printf(m, "bogomips\t: %lu.%02lu\n", |
| loops_per_jiffy / (500000/HZ), |
| (loops_per_jiffy / (5000/HZ)) % 100); |
| #endif |
| |
| #ifdef CONFIG_SMP |
| seq_printf(m, "\n"); |
| #endif |
| |
| preempt_enable(); |
| |
| /* If this is the last cpu, print the summary */ |
| if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) |
| show_cpuinfo_summary(m); |
| |
| return 0; |
| } |
| |
| static void *c_start(struct seq_file *m, loff_t *pos) |
| { |
| if (*pos == 0) /* just in case, cpu 0 is not the first */ |
| *pos = cpumask_first(cpu_online_mask); |
| else |
| *pos = cpumask_next(*pos - 1, cpu_online_mask); |
| if ((*pos) < nr_cpu_ids) |
| return (void *)(unsigned long)(*pos + 1); |
| return 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, |
| }; |
| |
| void __init check_for_initrd(void) |
| { |
| #ifdef CONFIG_BLK_DEV_INITRD |
| DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
| initrd_start, initrd_end); |
| |
| /* If we were passed an initrd, set the ROOT_DEV properly if the values |
| * look sensible. If not, clear initrd reference. |
| */ |
| if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
| initrd_end > initrd_start) |
| ROOT_DEV = Root_RAM0; |
| else |
| initrd_start = initrd_end = 0; |
| |
| if (initrd_start) |
| printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); |
| |
| DBG(" <- check_for_initrd()\n"); |
| #endif /* CONFIG_BLK_DEV_INITRD */ |
| } |
| |
| #ifdef CONFIG_SMP |
| |
| int threads_per_core, threads_shift; |
| cpumask_t threads_core_mask; |
| |
| static void __init cpu_init_thread_core_maps(int tpc) |
| { |
| int i; |
| |
| threads_per_core = tpc; |
| cpumask_clear(&threads_core_mask); |
| |
| /* This implementation only supports power of 2 number of threads |
| * for simplicity and performance |
| */ |
| threads_shift = ilog2(tpc); |
| BUG_ON(tpc != (1 << threads_shift)); |
| |
| for (i = 0; i < tpc; i++) |
| cpumask_set_cpu(i, &threads_core_mask); |
| |
| printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", |
| tpc, tpc > 1 ? "s" : ""); |
| printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); |
| } |
| |
| |
| /** |
| * setup_cpu_maps - initialize the following cpu maps: |
| * cpu_possible_mask |
| * cpu_present_mask |
| * |
| * Having the possible map set up early allows us to restrict allocations |
| * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. |
| * |
| * We do not initialize the online map here; cpus set their own bits in |
| * cpu_online_mask as they come up. |
| * |
| * This function is valid only for Open Firmware systems. finish_device_tree |
| * must be called before using this. |
| * |
| * While we're here, we may as well set the "physical" cpu ids in the paca. |
| * |
| * NOTE: This must match the parsing done in early_init_dt_scan_cpus. |
| */ |
| void __init smp_setup_cpu_maps(void) |
| { |
| struct device_node *dn = NULL; |
| int cpu = 0; |
| int nthreads = 1; |
| |
| DBG("smp_setup_cpu_maps()\n"); |
| |
| while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { |
| const int *intserv; |
| int j, len; |
| |
| DBG(" * %s...\n", dn->full_name); |
| |
| intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", |
| &len); |
| if (intserv) { |
| nthreads = len / sizeof(int); |
| DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", |
| nthreads); |
| } else { |
| DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); |
| intserv = of_get_property(dn, "reg", NULL); |
| if (!intserv) |
| intserv = &cpu; /* assume logical == phys */ |
| } |
| |
| for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { |
| DBG(" thread %d -> cpu %d (hard id %d)\n", |
| j, cpu, intserv[j]); |
| set_cpu_present(cpu, true); |
| set_hard_smp_processor_id(cpu, intserv[j]); |
| set_cpu_possible(cpu, true); |
| cpu++; |
| } |
| } |
| |
| /* If no SMT supported, nthreads is forced to 1 */ |
| if (!cpu_has_feature(CPU_FTR_SMT)) { |
| DBG(" SMT disabled ! nthreads forced to 1\n"); |
| nthreads = 1; |
| } |
| |
| #ifdef CONFIG_PPC64 |
| /* |
| * On pSeries LPAR, we need to know how many cpus |
| * could possibly be added to this partition. |
| */ |
| if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && |
| (dn = of_find_node_by_path("/rtas"))) { |
| int num_addr_cell, num_size_cell, maxcpus; |
| const unsigned int *ireg; |
| |
| num_addr_cell = of_n_addr_cells(dn); |
| num_size_cell = of_n_size_cells(dn); |
| |
| ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); |
| |
| if (!ireg) |
| goto out; |
| |
| maxcpus = ireg[num_addr_cell + num_size_cell]; |
| |
| /* Double maxcpus for processors which have SMT capability */ |
| if (cpu_has_feature(CPU_FTR_SMT)) |
| maxcpus *= nthreads; |
| |
| if (maxcpus > nr_cpu_ids) { |
| printk(KERN_WARNING |
| "Partition configured for %d cpus, " |
| "operating system maximum is %d.\n", |
| maxcpus, nr_cpu_ids); |
| maxcpus = nr_cpu_ids; |
| } else |
| printk(KERN_INFO "Partition configured for %d cpus.\n", |
| maxcpus); |
| |
| for (cpu = 0; cpu < maxcpus; cpu++) |
| set_cpu_possible(cpu, true); |
| out: |
| of_node_put(dn); |
| } |
| vdso_data->processorCount = num_present_cpus(); |
| #endif /* CONFIG_PPC64 */ |
| |
| /* Initialize CPU <=> thread mapping/ |
| * |
| * WARNING: We assume that the number of threads is the same for |
| * every CPU in the system. If that is not the case, then some code |
| * here will have to be reworked |
| */ |
| cpu_init_thread_core_maps(nthreads); |
| |
| /* Now that possible cpus are set, set nr_cpu_ids for later use */ |
| setup_nr_cpu_ids(); |
| |
| free_unused_pacas(); |
| } |
| #endif /* CONFIG_SMP */ |
| |
| #ifdef CONFIG_PCSPKR_PLATFORM |
| static __init int add_pcspkr(void) |
| { |
| struct device_node *np; |
| struct platform_device *pd; |
| int ret; |
| |
| np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); |
| of_node_put(np); |
| if (!np) |
| return -ENODEV; |
| |
| pd = platform_device_alloc("pcspkr", -1); |
| if (!pd) |
| return -ENOMEM; |
| |
| ret = platform_device_add(pd); |
| if (ret) |
| platform_device_put(pd); |
| |
| return ret; |
| } |
| device_initcall(add_pcspkr); |
| #endif /* CONFIG_PCSPKR_PLATFORM */ |
| |
| void probe_machine(void) |
| { |
| extern struct machdep_calls __machine_desc_start; |
| extern struct machdep_calls __machine_desc_end; |
| |
| /* |
| * Iterate all ppc_md structures until we find the proper |
| * one for the current machine type |
| */ |
| DBG("Probing machine type ...\n"); |
| |
| for (machine_id = &__machine_desc_start; |
| machine_id < &__machine_desc_end; |
| machine_id++) { |
| DBG(" %s ...", machine_id->name); |
| memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); |
| if (ppc_md.probe()) { |
| DBG(" match !\n"); |
| break; |
| } |
| DBG("\n"); |
| } |
| /* What can we do if we didn't find ? */ |
| if (machine_id >= &__machine_desc_end) { |
| DBG("No suitable machine found !\n"); |
| for (;;); |
| } |
| |
| printk(KERN_INFO "Using %s machine description\n", ppc_md.name); |
| } |
| |
| /* Match a class of boards, not a specific device configuration. */ |
| int check_legacy_ioport(unsigned long base_port) |
| { |
| struct device_node *parent, *np = NULL; |
| int ret = -ENODEV; |
| |
| switch(base_port) { |
| case I8042_DATA_REG: |
| if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) |
| np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); |
| if (np) { |
| parent = of_get_parent(np); |
| |
| of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); |
| if (!of_i8042_kbd_irq) |
| of_i8042_kbd_irq = 1; |
| |
| of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); |
| if (!of_i8042_aux_irq) |
| of_i8042_aux_irq = 12; |
| |
| of_node_put(np); |
| np = parent; |
| break; |
| } |
| np = of_find_node_by_type(NULL, "8042"); |
| /* Pegasos has no device_type on its 8042 node, look for the |
| * name instead */ |
| if (!np) |
| np = of_find_node_by_name(NULL, "8042"); |
| if (np) { |
| of_i8042_kbd_irq = 1; |
| of_i8042_aux_irq = 12; |
| } |
| break; |
| case FDC_BASE: /* FDC1 */ |
| np = of_find_node_by_type(NULL, "fdc"); |
| break; |
| #ifdef CONFIG_PPC_PREP |
| case _PIDXR: |
| case _PNPWRP: |
| case PNPBIOS_BASE: |
| /* implement me */ |
| #endif |
| default: |
| /* ipmi is supposed to fail here */ |
| break; |
| } |
| if (!np) |
| return ret; |
| parent = of_get_parent(np); |
| if (parent) { |
| if (strcmp(parent->type, "isa") == 0) |
| ret = 0; |
| of_node_put(parent); |
| } |
| of_node_put(np); |
| return ret; |
| } |
| EXPORT_SYMBOL(check_legacy_ioport); |
| |
| static int ppc_panic_event(struct notifier_block *this, |
| unsigned long event, void *ptr) |
| { |
| ppc_md.panic(ptr); /* May not return */ |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block ppc_panic_block = { |
| .notifier_call = ppc_panic_event, |
| .priority = INT_MIN /* may not return; must be done last */ |
| }; |
| |
| void __init setup_panic(void) |
| { |
| atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); |
| } |
| |
| #ifdef CONFIG_CHECK_CACHE_COHERENCY |
| /* |
| * For platforms that have configurable cache-coherency. This function |
| * checks that the cache coherency setting of the kernel matches the setting |
| * left by the firmware, as indicated in the device tree. Since a mismatch |
| * will eventually result in DMA failures, we print * and error and call |
| * BUG() in that case. |
| */ |
| |
| #ifdef CONFIG_NOT_COHERENT_CACHE |
| #define KERNEL_COHERENCY 0 |
| #else |
| #define KERNEL_COHERENCY 1 |
| #endif |
| |
| static int __init check_cache_coherency(void) |
| { |
| struct device_node *np; |
| const void *prop; |
| int devtree_coherency; |
| |
| np = of_find_node_by_path("/"); |
| prop = of_get_property(np, "coherency-off", NULL); |
| of_node_put(np); |
| |
| devtree_coherency = prop ? 0 : 1; |
| |
| if (devtree_coherency != KERNEL_COHERENCY) { |
| printk(KERN_ERR |
| "kernel coherency:%s != device tree_coherency:%s\n", |
| KERNEL_COHERENCY ? "on" : "off", |
| devtree_coherency ? "on" : "off"); |
| BUG(); |
| } |
| |
| return 0; |
| } |
| |
| late_initcall(check_cache_coherency); |
| #endif /* CONFIG_CHECK_CACHE_COHERENCY */ |
| |
| #ifdef CONFIG_DEBUG_FS |
| struct dentry *powerpc_debugfs_root; |
| EXPORT_SYMBOL(powerpc_debugfs_root); |
| |
| static int powerpc_debugfs_init(void) |
| { |
| powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); |
| |
| return powerpc_debugfs_root == NULL; |
| } |
| arch_initcall(powerpc_debugfs_init); |
| #endif |
| |
| void ppc_printk_progress(char *s, unsigned short hex) |
| { |
| pr_info("%s\n", s); |
| } |
| |
| static int ppc_dflt_bus_notify(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct device *dev = data; |
| |
| /* We are only intereted in device addition */ |
| if (action != BUS_NOTIFY_ADD_DEVICE) |
| return 0; |
| |
| set_dma_ops(dev, &dma_direct_ops); |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block ppc_dflt_plat_bus_notifier = { |
| .notifier_call = ppc_dflt_bus_notify, |
| .priority = INT_MAX, |
| }; |
| |
| static int __init setup_bus_notifier(void) |
| { |
| bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier); |
| return 0; |
| } |
| |
| arch_initcall(setup_bus_notifier); |