/* * Powermac setup and early boot code plus other random bits. * * PowerPC version * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) * * Adapted for Power Macintosh by Paul Mackerras * Copyright (C) 1996 Paul Mackerras (paulus@samba.org) * * Derived from "arch/alpha/kernel/setup.c" * Copyright (C) 1995 Linus Torvalds * * Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org) * * 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. * */ /* * bootup setup stuff.. */ #include <linux/config.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> #include <linux/slab.h> #include <linux/user.h> #include <linux/a.out.h> #include <linux/tty.h> #include <linux/string.h> #include <linux/delay.h> #include <linux/ioport.h> #include <linux/major.h> #include <linux/initrd.h> #include <linux/vt_kern.h> #include <linux/console.h> #include <linux/ide.h> #include <linux/pci.h> #include <linux/adb.h> #include <linux/cuda.h> #include <linux/pmu.h> #include <linux/irq.h> #include <linux/seq_file.h> #include <linux/root_dev.h> #include <linux/bitops.h> #include <linux/suspend.h> #include <asm/reg.h> #include <asm/sections.h> #include <asm/prom.h> #include <asm/system.h> #include <asm/pgtable.h> #include <asm/io.h> #include <asm/pci-bridge.h> #include <asm/ohare.h> #include <asm/mediabay.h> #include <asm/machdep.h> #include <asm/dma.h> #include <asm/cputable.h> #include <asm/btext.h> #include <asm/pmac_feature.h> #include <asm/time.h> #include <asm/of_device.h> #include <asm/mmu_context.h> #include <asm/iommu.h> #include <asm/smu.h> #include <asm/pmc.h> #include <asm/mpic.h> #include <asm/lmb.h> #include "pmac.h" #undef SHOW_GATWICK_IRQS unsigned char drive_info; int ppc_override_l2cr = 0; int ppc_override_l2cr_value; int has_l2cache = 0; int pmac_newworld = 1; static int current_root_goodness = -1; extern int pmac_newworld; extern struct machdep_calls pmac_md; #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */ #ifdef CONFIG_PPC64 #include <asm/udbg.h> int sccdbg; #endif extern void zs_kgdb_hook(int tty_num); sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; EXPORT_SYMBOL(sys_ctrler); #ifdef CONFIG_PMAC_SMU unsigned long smu_cmdbuf_abs; EXPORT_SYMBOL(smu_cmdbuf_abs); #endif #ifdef CONFIG_SMP extern struct smp_ops_t psurge_smp_ops; extern struct smp_ops_t core99_smp_ops; #endif /* CONFIG_SMP */ static void pmac_show_cpuinfo(struct seq_file *m) { struct device_node *np; char *pp; int plen; int mbmodel; unsigned int mbflags; char* mbname; mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_MODEL, 0); mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_FLAGS, 0); if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (long) &mbname) != 0) mbname = "Unknown"; /* find motherboard type */ seq_printf(m, "machine\t\t: "); np = of_find_node_by_path("/"); if (np != NULL) { pp = (char *) get_property(np, "model", NULL); if (pp != NULL) seq_printf(m, "%s\n", pp); else seq_printf(m, "PowerMac\n"); pp = (char *) get_property(np, "compatible", &plen); if (pp != NULL) { seq_printf(m, "motherboard\t:"); while (plen > 0) { int l = strlen(pp) + 1; seq_printf(m, " %s", pp); plen -= l; pp += l; } seq_printf(m, "\n"); } of_node_put(np); } else seq_printf(m, "PowerMac\n"); /* print parsed model */ seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname); seq_printf(m, "pmac flags\t: %08x\n", mbflags); /* find l2 cache info */ np = of_find_node_by_name(NULL, "l2-cache"); if (np == NULL) np = of_find_node_by_type(NULL, "cache"); if (np != NULL) { unsigned int *ic = (unsigned int *) get_property(np, "i-cache-size", NULL); unsigned int *dc = (unsigned int *) get_property(np, "d-cache-size", NULL); seq_printf(m, "L2 cache\t:"); has_l2cache = 1; if (get_property(np, "cache-unified", NULL) != 0 && dc) { seq_printf(m, " %dK unified", *dc / 1024); } else { if (ic) seq_printf(m, " %dK instruction", *ic / 1024); if (dc) seq_printf(m, "%s %dK data", (ic? " +": ""), *dc / 1024); } pp = get_property(np, "ram-type", NULL); if (pp) seq_printf(m, " %s", pp); seq_printf(m, "\n"); of_node_put(np); } /* Indicate newworld/oldworld */ seq_printf(m, "pmac-generation\t: %s\n", pmac_newworld ? "NewWorld" : "OldWorld"); } #ifndef CONFIG_ADB_CUDA int find_via_cuda(void) { if (!find_devices("via-cuda")) return 0; printk("WARNING ! Your machine is CUDA-based but your kernel\n"); printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n"); return 0; } #endif #ifndef CONFIG_ADB_PMU int find_via_pmu(void) { if (!find_devices("via-pmu")) return 0; printk("WARNING ! Your machine is PMU-based but your kernel\n"); printk(" wasn't compiled with CONFIG_ADB_PMU option !\n"); return 0; } #endif #ifndef CONFIG_PMAC_SMU int smu_init(void) { /* should check and warn if SMU is present */ return 0; } #endif #ifdef CONFIG_PPC32 static volatile u32 *sysctrl_regs; static void __init ohare_init(void) { /* this area has the CPU identification register and some registers used by smp boards */ sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000); /* * Turn on the L2 cache. * We assume that we have a PSX memory controller iff * we have an ohare I/O controller. */ if (find_devices("ohare") != NULL) { if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) { if (sysctrl_regs[4] & 0x10) sysctrl_regs[4] |= 0x04000020; else sysctrl_regs[4] |= 0x04000000; if(has_l2cache) printk(KERN_INFO "Level 2 cache enabled\n"); } } } static void __init l2cr_init(void) { /* Checks "l2cr-value" property in the registry */ if (cpu_has_feature(CPU_FTR_L2CR)) { struct device_node *np = find_devices("cpus"); if (np == 0) np = find_type_devices("cpu"); if (np != 0) { unsigned int *l2cr = (unsigned int *) get_property(np, "l2cr-value", NULL); if (l2cr != 0) { ppc_override_l2cr = 1; ppc_override_l2cr_value = *l2cr; _set_L2CR(0); _set_L2CR(ppc_override_l2cr_value); } } } if (ppc_override_l2cr) printk(KERN_INFO "L2CR overridden (0x%x), " "backside cache is %s\n", ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000) ? "enabled" : "disabled"); } #endif void __init pmac_setup_arch(void) { struct device_node *cpu, *ic; int *fp; unsigned long pvr; pvr = PVR_VER(mfspr(SPRN_PVR)); /* Set loops_per_jiffy to a half-way reasonable value, for use until calibrate_delay gets called. */ loops_per_jiffy = 50000000 / HZ; cpu = of_find_node_by_type(NULL, "cpu"); if (cpu != NULL) { fp = (int *) get_property(cpu, "clock-frequency", NULL); if (fp != NULL) { if (pvr >= 0x30 && pvr < 0x80) /* PPC970 etc. */ loops_per_jiffy = *fp / (3 * HZ); else if (pvr == 4 || pvr >= 8) /* 604, G3, G4 etc. */ loops_per_jiffy = *fp / HZ; else /* 601, 603, etc. */ loops_per_jiffy = *fp / (2 * HZ); } of_node_put(cpu); } /* See if newworld or oldworld */ for (ic = NULL; (ic = of_find_all_nodes(ic)) != NULL; ) if (get_property(ic, "interrupt-controller", NULL)) break; pmac_newworld = (ic != NULL); if (ic) of_node_put(ic); /* Lookup PCI hosts */ pmac_pci_init(); #ifdef CONFIG_PPC32 ohare_init(); l2cr_init(); #endif /* CONFIG_PPC32 */ #ifdef CONFIG_PPC64 /* Probe motherboard chipset */ /* this is done earlier in setup_arch for 32-bit */ pmac_feature_init(); /* We can NAP */ powersave_nap = 1; printk(KERN_INFO "Using native/NAP idle loop\n"); #endif #ifdef CONFIG_KGDB zs_kgdb_hook(0); #endif find_via_cuda(); find_via_pmu(); smu_init(); #if defined(CONFIG_NVRAM) || defined(CONFIG_PPC64) pmac_nvram_init(); #endif #ifdef CONFIG_PPC32 #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start) ROOT_DEV = Root_RAM0; else #endif ROOT_DEV = DEFAULT_ROOT_DEVICE; #endif #ifdef CONFIG_SMP /* Check for Core99 */ if (find_devices("uni-n") || find_devices("u3")) smp_ops = &core99_smp_ops; #ifdef CONFIG_PPC32 else smp_ops = &psurge_smp_ops; #endif #endif /* CONFIG_SMP */ } char *bootpath; char *bootdevice; void *boot_host; int boot_target; int boot_part; extern dev_t boot_dev; #ifdef CONFIG_SCSI void __init note_scsi_host(struct device_node *node, void *host) { int l; char *p; l = strlen(node->full_name); if (bootpath != NULL && bootdevice != NULL && strncmp(node->full_name, bootdevice, l) == 0 && (bootdevice[l] == '/' || bootdevice[l] == 0)) { boot_host = host; /* * There's a bug in OF 1.0.5. (Why am I not surprised.) * If you pass a path like scsi/sd@1:0 to canon, it returns * something like /bandit@F2000000/gc@10/53c94@10000/sd@0,0 * That is, the scsi target number doesn't get preserved. * So we pick the target number out of bootpath and use that. */ p = strstr(bootpath, "/sd@"); if (p != NULL) { p += 4; boot_target = simple_strtoul(p, NULL, 10); p = strchr(p, ':'); if (p != NULL) boot_part = simple_strtoul(p + 1, NULL, 10); } } } EXPORT_SYMBOL(note_scsi_host); #endif #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC) static dev_t __init find_ide_boot(void) { char *p; int n; dev_t __init pmac_find_ide_boot(char *bootdevice, int n); if (bootdevice == NULL) return 0; p = strrchr(bootdevice, '/'); if (p == NULL) return 0; n = p - bootdevice; return pmac_find_ide_boot(bootdevice, n); } #endif /* CONFIG_BLK_DEV_IDE && CONFIG_BLK_DEV_IDE_PMAC */ static void __init find_boot_device(void) { #if defined(CONFIG_BLK_DEV_IDE) && defined(CONFIG_BLK_DEV_IDE_PMAC) boot_dev = find_ide_boot(); #endif } /* TODO: Merge the suspend-to-ram with the common code !!! * currently, this is a stub implementation for suspend-to-disk * only */ #ifdef CONFIG_SOFTWARE_SUSPEND static int pmac_pm_prepare(suspend_state_t state) { printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state); return 0; } static int pmac_pm_enter(suspend_state_t state) { printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state); /* Giveup the lazy FPU & vec so we don't have to back them * up from the low level code */ enable_kernel_fp(); #ifdef CONFIG_ALTIVEC if (cur_cpu_spec->cpu_features & CPU_FTR_ALTIVEC) enable_kernel_altivec(); #endif /* CONFIG_ALTIVEC */ return 0; } static int pmac_pm_finish(suspend_state_t state) { printk(KERN_DEBUG "%s(%d)\n", __FUNCTION__, state); /* Restore userland MMU context */ set_context(current->active_mm->context, current->active_mm->pgd); return 0; } static struct pm_ops pmac_pm_ops = { .pm_disk_mode = PM_DISK_SHUTDOWN, .prepare = pmac_pm_prepare, .enter = pmac_pm_enter, .finish = pmac_pm_finish, }; #endif /* CONFIG_SOFTWARE_SUSPEND */ static int initializing = 1; static int pmac_late_init(void) { initializing = 0; #ifdef CONFIG_SOFTWARE_SUSPEND pm_set_ops(&pmac_pm_ops); #endif /* CONFIG_SOFTWARE_SUSPEND */ return 0; } late_initcall(pmac_late_init); /* can't be __init - can be called whenever a disk is first accessed */ void note_bootable_part(dev_t dev, int part, int goodness) { static int found_boot = 0; char *p; if (!initializing) return; if ((goodness <= current_root_goodness) && ROOT_DEV != DEFAULT_ROOT_DEVICE) return; p = strstr(saved_command_line, "root="); if (p != NULL && (p == saved_command_line || p[-1] == ' ')) return; if (!found_boot) { find_boot_device(); found_boot = 1; } if (!boot_dev || dev == boot_dev) { ROOT_DEV = dev + part; boot_dev = 0; current_root_goodness = goodness; } } #ifdef CONFIG_ADB_CUDA static void cuda_restart(void) { struct adb_request req; cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM); for (;;) cuda_poll(); } static void cuda_shutdown(void) { struct adb_request req; cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN); for (;;) cuda_poll(); } #else #define cuda_restart() #define cuda_shutdown() #endif #ifndef CONFIG_ADB_PMU #define pmu_restart() #define pmu_shutdown() #endif #ifndef CONFIG_PMAC_SMU #define smu_restart() #define smu_shutdown() #endif static void pmac_restart(char *cmd) { switch (sys_ctrler) { case SYS_CTRLER_CUDA: cuda_restart(); break; case SYS_CTRLER_PMU: pmu_restart(); break; case SYS_CTRLER_SMU: smu_restart(); break; default: ; } } static void pmac_power_off(void) { switch (sys_ctrler) { case SYS_CTRLER_CUDA: cuda_shutdown(); break; case SYS_CTRLER_PMU: pmu_shutdown(); break; case SYS_CTRLER_SMU: smu_shutdown(); break; default: ; } } static void pmac_halt(void) { pmac_power_off(); } #ifdef CONFIG_PPC32 void __init pmac_init(void) { /* isa_io_base gets set in pmac_pci_init */ isa_mem_base = PMAC_ISA_MEM_BASE; pci_dram_offset = PMAC_PCI_DRAM_OFFSET; ISA_DMA_THRESHOLD = ~0L; DMA_MODE_READ = 1; DMA_MODE_WRITE = 2; ppc_md = pmac_md; #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) #ifdef CONFIG_BLK_DEV_IDE_PMAC ppc_ide_md.ide_init_hwif = pmac_ide_init_hwif_ports; ppc_ide_md.default_io_base = pmac_ide_get_base; #endif /* CONFIG_BLK_DEV_IDE_PMAC */ #endif /* defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE) */ if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0); } #endif /* * Early initialization. */ static void __init pmac_init_early(void) { #ifdef CONFIG_PPC64 /* Initialize hash table, from now on, we can take hash faults * and call ioremap */ hpte_init_native(); /* Init SCC */ if (strstr(cmd_line, "sccdbg")) { sccdbg = 1; udbg_init_scc(NULL); } /* Setup interrupt mapping options */ ppc64_interrupt_controller = IC_OPEN_PIC; iommu_init_early_u3(); #endif } static void __init pmac_progress(char *s, unsigned short hex) { #ifdef CONFIG_PPC64 if (sccdbg) { udbg_puts(s); udbg_puts("\n"); return; } #endif #ifdef CONFIG_BOOTX_TEXT if (boot_text_mapped) { btext_drawstring(s); btext_drawchar('\n'); } #endif /* CONFIG_BOOTX_TEXT */ } /* * pmac has no legacy IO, anything calling this function has to * fail or bad things will happen */ static int pmac_check_legacy_ioport(unsigned int baseport) { return -ENODEV; } static int __init pmac_declare_of_platform_devices(void) { struct device_node *np, *npp; np = find_devices("uni-n"); if (np) { for (np = np->child; np != NULL; np = np->sibling) if (strncmp(np->name, "i2c", 3) == 0) { of_platform_device_create(np, "uni-n-i2c", NULL); break; } } np = find_devices("valkyrie"); if (np) of_platform_device_create(np, "valkyrie", NULL); np = find_devices("platinum"); if (np) of_platform_device_create(np, "platinum", NULL); npp = of_find_node_by_name(NULL, "u3"); if (npp) { for (np = NULL; (np = of_get_next_child(npp, np)) != NULL;) { if (strncmp(np->name, "i2c", 3) == 0) { of_platform_device_create(np, "u3-i2c", NULL); of_node_put(np); break; } } of_node_put(npp); } np = of_find_node_by_type(NULL, "smu"); if (np) { of_platform_device_create(np, "smu", NULL); of_node_put(np); } return 0; } device_initcall(pmac_declare_of_platform_devices); /* * Called very early, MMU is off, device-tree isn't unflattened */ static int __init pmac_probe(int platform) { #ifdef CONFIG_PPC64 if (platform != PLATFORM_POWERMAC) return 0; /* * On U3, the DART (iommu) must be allocated now since it * has an impact on htab_initialize (due to the large page it * occupies having to be broken up so the DART itself is not * part of the cacheable linar mapping */ alloc_u3_dart_table(); #endif #ifdef CONFIG_PMAC_SMU /* * SMU based G5s need some memory below 2Gb, at least the current * driver needs that. We have to allocate it now. We allocate 4k * (1 small page) for now. */ smu_cmdbuf_abs = lmb_alloc_base(4096, 4096, 0x80000000UL); #endif /* CONFIG_PMAC_SMU */ return 1; } #ifdef CONFIG_PPC64 static int pmac_probe_mode(struct pci_bus *bus) { struct device_node *node = bus->sysdata; /* We need to use normal PCI probing for the AGP bus, since the device for the AGP bridge isn't in the tree. */ if (bus->self == NULL && device_is_compatible(node, "u3-agp")) return PCI_PROBE_NORMAL; return PCI_PROBE_DEVTREE; } #endif struct machdep_calls __initdata pmac_md = { #if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC64) .cpu_die = generic_mach_cpu_die, #endif .probe = pmac_probe, .setup_arch = pmac_setup_arch, .init_early = pmac_init_early, .show_cpuinfo = pmac_show_cpuinfo, .init_IRQ = pmac_pic_init, .get_irq = mpic_get_irq, /* changed later */ .pcibios_fixup = pmac_pcibios_fixup, .restart = pmac_restart, .power_off = pmac_power_off, .halt = pmac_halt, .time_init = pmac_time_init, .get_boot_time = pmac_get_boot_time, .set_rtc_time = pmac_set_rtc_time, .get_rtc_time = pmac_get_rtc_time, .calibrate_decr = pmac_calibrate_decr, .feature_call = pmac_do_feature_call, .check_legacy_ioport = pmac_check_legacy_ioport, .progress = pmac_progress, #ifdef CONFIG_PPC64 .pci_probe_mode = pmac_probe_mode, .idle_loop = native_idle, .enable_pmcs = power4_enable_pmcs, #endif #ifdef CONFIG_PPC32 .pcibios_enable_device_hook = pmac_pci_enable_device_hook, .pcibios_after_init = pmac_pcibios_after_init, .phys_mem_access_prot = pci_phys_mem_access_prot, #endif };