/* * arch/ppc/platforms/setup.c * * PowerPC version * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) * * Adapted for Power Macintosh by Paul Mackerras * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) * * 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/bootx.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 "pmac_pic.h" #include "mem_pieces.h" #undef SHOW_GATWICK_IRQS extern long pmac_time_init(void); extern unsigned long pmac_get_rtc_time(void); extern int pmac_set_rtc_time(unsigned long nowtime); extern void pmac_read_rtc_time(void); extern void pmac_calibrate_decr(void); extern void pmac_pcibios_fixup(void); extern void pmac_find_bridges(void); extern unsigned long pmac_ide_get_base(int index); extern void pmac_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port, unsigned long ctrl_port, int *irq); extern void pmac_nvram_update(void); extern unsigned char pmac_nvram_read_byte(int addr); extern void pmac_nvram_write_byte(int addr, unsigned char val); extern int pmac_pci_enable_device_hook(struct pci_dev *dev, int initial); extern void pmac_pcibios_after_init(void); extern int of_show_percpuinfo(struct seq_file *m, int i); struct device_node *memory_node; unsigned char drive_info; int ppc_override_l2cr = 0; int ppc_override_l2cr_value; int has_l2cache = 0; static int current_root_goodness = -1; extern int pmac_newworld; #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */ extern void zs_kgdb_hook(int tty_num); static void ohare_init(void); #ifdef CONFIG_BOOTX_TEXT static void pmac_progress(char *s, unsigned short hex); #endif sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; #ifdef CONFIG_SMP extern struct smp_ops_t psurge_smp_ops; extern struct smp_ops_t core99_smp_ops; #endif /* CONFIG_SMP */ static int __pmac pmac_show_cpuinfo(struct seq_file *m) { struct device_node *np; char *pp; int plen; int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_MODEL, 0); unsigned int mbflags = (unsigned int)pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_FLAGS, 0); char* mbname; if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME, (int)&mbname) != 0) mbname = "Unknown"; /* find motherboard type */ seq_printf(m, "machine\t\t: "); np = find_devices("device-tree"); 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"); } } 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 = find_devices("l2-cache"); if (np == 0) np = find_type_devices("cache"); if (np != 0) { 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"); } /* find ram info */ np = find_devices("memory"); if (np != 0) { int n; struct reg_property *reg = (struct reg_property *) get_property(np, "reg", &n); if (reg != 0) { unsigned long total = 0; for (n /= sizeof(struct reg_property); n > 0; --n) total += (reg++)->size; seq_printf(m, "memory\t\t: %luMB\n", total >> 20); } } /* Checks "l2cr-value" property in the registry */ 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) { seq_printf(m, "l2cr override\t: 0x%x\n", *l2cr); } } /* Indicate newworld/oldworld */ seq_printf(m, "pmac-generation\t: %s\n", pmac_newworld ? "NewWorld" : "OldWorld"); return 0; } static int __openfirmware pmac_show_percpuinfo(struct seq_file *m, int i) { #ifdef CONFIG_CPU_FREQ_PMAC extern unsigned int pmac_get_one_cpufreq(int i); unsigned int freq = pmac_get_one_cpufreq(i); if (freq != 0) { seq_printf(m, "clock\t\t: %dMHz\n", freq/1000); return 0; } #endif /* CONFIG_CPU_FREQ_PMAC */ return of_show_percpuinfo(m, i); } static volatile u32 *sysctrl_regs; void __init pmac_setup_arch(void) { struct device_node *cpu; 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. */ cpu = find_type_devices("cpu"); if (cpu != 0) { fp = (int *) get_property(cpu, "clock-frequency", NULL); if (fp != 0) { if (pvr == 4 || pvr >= 8) /* 604, G3, G4 etc. */ loops_per_jiffy = *fp / HZ; else /* 601, 603, etc. */ loops_per_jiffy = *fp / (2*HZ); } else loops_per_jiffy = 50000000 / HZ; } /* this area has the CPU identification register and some registers used by smp boards */ sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000); ohare_init(); /* Lookup PCI hosts */ pmac_find_bridges(); /* 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 overriden (0x%x), backside cache is %s\n", ppc_override_l2cr_value, (ppc_override_l2cr_value & 0x80000000) ? "enabled" : "disabled"); #ifdef CONFIG_KGDB zs_kgdb_hook(0); #endif #ifdef CONFIG_ADB_CUDA find_via_cuda(); #else if (find_devices("via-cuda")) { printk("WARNING ! Your machine is Cuda based but your kernel\n"); printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n"); } #endif #ifdef CONFIG_ADB_PMU find_via_pmu(); #else if (find_devices("via-pmu")) { printk("WARNING ! Your machine is PMU based but your kernel\n"); printk(" wasn't compiled with CONFIG_ADB_PMU option !\n"); } #endif #ifdef CONFIG_NVRAM pmac_nvram_init(); #endif #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start) ROOT_DEV = Root_RAM0; else #endif ROOT_DEV = DEFAULT_ROOT_DEVICE; #ifdef CONFIG_SMP /* Check for Core99 */ if (find_devices("uni-n") || find_devices("u3")) ppc_md.smp_ops = &core99_smp_ops; else ppc_md.smp_ops = &psurge_smp_ops; #endif /* CONFIG_SMP */ pci_create_OF_bus_map(); } static void __init ohare_init(void) { /* * 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"); } } } extern char *bootpath; extern 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); } } } #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 } static int initializing = 1; /* 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[0]->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 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 __pmac 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; } } static void __pmac pmac_restart(char *cmd) { #ifdef CONFIG_ADB_CUDA struct adb_request req; #endif /* CONFIG_ADB_CUDA */ switch (sys_ctrler) { #ifdef CONFIG_ADB_CUDA case SYS_CTRLER_CUDA: cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM); for (;;) cuda_poll(); break; #endif /* CONFIG_ADB_CUDA */ #ifdef CONFIG_ADB_PMU case SYS_CTRLER_PMU: pmu_restart(); break; #endif /* CONFIG_ADB_PMU */ default: ; } } static void __pmac pmac_power_off(void) { #ifdef CONFIG_ADB_CUDA struct adb_request req; #endif /* CONFIG_ADB_CUDA */ switch (sys_ctrler) { #ifdef CONFIG_ADB_CUDA case SYS_CTRLER_CUDA: cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN); for (;;) cuda_poll(); break; #endif /* CONFIG_ADB_CUDA */ #ifdef CONFIG_ADB_PMU case SYS_CTRLER_PMU: pmu_shutdown(); break; #endif /* CONFIG_ADB_PMU */ default: ; } } static void __pmac pmac_halt(void) { pmac_power_off(); } /* * Read in a property describing some pieces of memory. */ static int __init get_mem_prop(char *name, struct mem_pieces *mp) { struct reg_property *rp; int i, s; unsigned int *ip; int nac = prom_n_addr_cells(memory_node); int nsc = prom_n_size_cells(memory_node); ip = (unsigned int *) get_property(memory_node, name, &s); if (ip == NULL) { printk(KERN_ERR "error: couldn't get %s property on /memory\n", name); return 0; } s /= (nsc + nac) * 4; rp = mp->regions; for (i = 0; i < s; ++i, ip += nac+nsc) { if (nac >= 2 && ip[nac-2] != 0) continue; rp->address = ip[nac-1]; if (nsc >= 2 && ip[nac+nsc-2] != 0) rp->size = ~0U; else rp->size = ip[nac+nsc-1]; ++rp; } mp->n_regions = rp - mp->regions; /* Make sure the pieces are sorted. */ mem_pieces_sort(mp); mem_pieces_coalesce(mp); return 1; } /* * On systems with Open Firmware, collect information about * physical RAM and which pieces are already in use. * At this point, we have (at least) the first 8MB mapped with a BAT. * Our text, data, bss use something over 1MB, starting at 0. * Open Firmware may be using 1MB at the 4MB point. */ unsigned long __init pmac_find_end_of_memory(void) { unsigned long a, total; struct mem_pieces phys_mem; /* * Find out where physical memory is, and check that it * starts at 0 and is contiguous. It seems that RAM is * always physically contiguous on Power Macintoshes. * * Supporting discontiguous physical memory isn't hard, * it just makes the virtual <-> physical mapping functions * more complicated (or else you end up wasting space * in mem_map). */ memory_node = find_devices("memory"); if (memory_node == NULL || !get_mem_prop("reg", &phys_mem) || phys_mem.n_regions == 0) panic("No RAM??"); a = phys_mem.regions[0].address; if (a != 0) panic("RAM doesn't start at physical address 0"); total = phys_mem.regions[0].size; if (phys_mem.n_regions > 1) { printk("RAM starting at 0x%x is not contiguous\n", phys_mem.regions[1].address); printk("Using RAM from 0 to 0x%lx\n", total-1); } return total; } void __init pmac_init(unsigned long r3, unsigned long r4, unsigned long r5, unsigned long r6, unsigned long r7) { /* isa_io_base gets set in pmac_find_bridges */ 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.setup_arch = pmac_setup_arch; ppc_md.show_cpuinfo = pmac_show_cpuinfo; ppc_md.show_percpuinfo = pmac_show_percpuinfo; ppc_md.irq_canonicalize = NULL; ppc_md.init_IRQ = pmac_pic_init; ppc_md.get_irq = pmac_get_irq; /* Changed later on ... */ ppc_md.pcibios_fixup = pmac_pcibios_fixup; ppc_md.pcibios_enable_device_hook = pmac_pci_enable_device_hook; ppc_md.pcibios_after_init = pmac_pcibios_after_init; ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot; ppc_md.restart = pmac_restart; ppc_md.power_off = pmac_power_off; ppc_md.halt = pmac_halt; ppc_md.time_init = pmac_time_init; ppc_md.set_rtc_time = pmac_set_rtc_time; ppc_md.get_rtc_time = pmac_get_rtc_time; ppc_md.calibrate_decr = pmac_calibrate_decr; ppc_md.find_end_of_memory = pmac_find_end_of_memory; ppc_md.feature_call = pmac_do_feature_call; #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) */ #ifdef CONFIG_BOOTX_TEXT ppc_md.progress = pmac_progress; #endif /* CONFIG_BOOTX_TEXT */ if (ppc_md.progress) ppc_md.progress("pmac_init(): exit", 0); } #ifdef CONFIG_BOOTX_TEXT static void __init pmac_progress(char *s, unsigned short hex) { if (boot_text_mapped) { btext_drawstring(s); btext_drawchar('\n'); } } #endif /* CONFIG_BOOTX_TEXT */ static int __init pmac_declare_of_platform_devices(void) { struct device_node *np; 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"); break; } } np = find_devices("u3"); if (np) { for (np = np->child; np != NULL; np = np->sibling) if (strncmp(np->name, "i2c", 3) == 0) { of_platform_device_create(np, "u3-i2c"); break; } } np = find_devices("valkyrie"); if (np) of_platform_device_create(np, "valkyrie"); np = find_devices("platinum"); if (np) of_platform_device_create(np, "platinum"); return 0; } device_initcall(pmac_declare_of_platform_devices);