| /* |
| * 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/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/export.h> |
| #include <linux/user.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/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 <linux/of_device.h> |
| #include <linux/of_platform.h> |
| |
| #include <asm/reg.h> |
| #include <asm/sections.h> |
| #include <asm/prom.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/mmu_context.h> |
| #include <asm/iommu.h> |
| #include <asm/smu.h> |
| #include <asm/pmc.h> |
| #include <asm/udbg.h> |
| |
| #include "pmac.h" |
| |
| #undef SHOW_GATWICK_IRQS |
| |
| int ppc_override_l2cr = 0; |
| int ppc_override_l2cr_value; |
| int has_l2cache = 0; |
| |
| int pmac_newworld; |
| |
| static int current_root_goodness = -1; |
| |
| extern struct machdep_calls pmac_md; |
| |
| #define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */ |
| |
| #ifdef CONFIG_PPC64 |
| int sccdbg; |
| #endif |
| |
| sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN; |
| EXPORT_SYMBOL(sys_ctrler); |
| |
| static void pmac_show_cpuinfo(struct seq_file *m) |
| { |
| struct device_node *np; |
| const 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 = of_get_property(np, "model", NULL); |
| if (pp != NULL) |
| seq_printf(m, "%s\n", pp); |
| else |
| seq_printf(m, "PowerMac\n"); |
| pp = of_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) { |
| const unsigned int *ic = |
| of_get_property(np, "i-cache-size", NULL); |
| const unsigned int *dc = |
| of_get_property(np, "d-cache-size", NULL); |
| seq_printf(m, "L2 cache\t:"); |
| has_l2cache = 1; |
| if (of_get_property(np, "cache-unified", NULL) && 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 = of_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) |
| { |
| struct device_node *dn = of_find_node_by_name(NULL, "via-cuda"); |
| |
| if (!dn) |
| return 0; |
| of_node_put(dn); |
| 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) |
| { |
| struct device_node *dn = of_find_node_by_name(NULL, "via-pmu"); |
| |
| if (!dn) |
| return 0; |
| of_node_put(dn); |
| 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) |
| { |
| struct device_node *dn; |
| |
| /* 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. |
| */ |
| dn = of_find_node_by_name(NULL, "ohare"); |
| if (dn) { |
| of_node_put(dn); |
| 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; |
| |
| for_each_of_cpu_node(np) { |
| const unsigned int *l2cr = |
| of_get_property(np, "l2cr-value", NULL); |
| if (l2cr) { |
| ppc_override_l2cr = 1; |
| ppc_override_l2cr_value = *l2cr; |
| _set_L2CR(0); |
| _set_L2CR(ppc_override_l2cr_value); |
| } |
| of_node_put(np); |
| break; |
| } |
| } |
| |
| 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 |
| |
| static void __init pmac_setup_arch(void) |
| { |
| struct device_node *cpu, *ic; |
| const 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; |
| |
| for_each_of_cpu_node(cpu) { |
| fp = of_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); |
| break; |
| } |
| } |
| |
| /* See if newworld or oldworld */ |
| ic = of_find_node_with_property(NULL, "interrupt-controller"); |
| if (ic) { |
| pmac_newworld = 1; |
| of_node_put(ic); |
| } |
| |
| /* Lookup PCI hosts */ |
| pmac_pci_init(); |
| |
| #ifdef CONFIG_PPC32 |
| ohare_init(); |
| l2cr_init(); |
| #endif /* CONFIG_PPC32 */ |
| |
| find_via_cuda(); |
| find_via_pmu(); |
| smu_init(); |
| |
| #if defined(CONFIG_NVRAM) || defined(CONFIG_NVRAM_MODULE) || \ |
| 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_ADB |
| if (strstr(boot_command_line, "adb_sync")) { |
| extern int __adb_probe_sync; |
| __adb_probe_sync = 1; |
| } |
| #endif /* CONFIG_ADB */ |
| } |
| |
| #ifdef CONFIG_SCSI |
| void note_scsi_host(struct device_node *node, void *host) |
| { |
| } |
| EXPORT_SYMBOL(note_scsi_host); |
| #endif |
| |
| static int initializing = 1; |
| |
| static int pmac_late_init(void) |
| { |
| initializing = 0; |
| return 0; |
| } |
| machine_late_initcall(powermac, pmac_late_init); |
| |
| void note_bootable_part(dev_t dev, int part, int goodness); |
| /* |
| * This is __ref because we check for "initializing" before |
| * touching any of the __init sensitive things and "initializing" |
| * will be false after __init time. This can't be __init because it |
| * can be called whenever a disk is first accessed. |
| */ |
| void __ref note_bootable_part(dev_t dev, int part, int goodness) |
| { |
| char *p; |
| |
| if (!initializing) |
| return; |
| if ((goodness <= current_root_goodness) && |
| ROOT_DEV != DEFAULT_ROOT_DEVICE) |
| return; |
| p = strstr(boot_command_line, "root="); |
| if (p != NULL && (p == boot_command_line || p[-1] == ' ')) |
| return; |
| |
| ROOT_DEV = dev + part; |
| current_root_goodness = goodness; |
| } |
| |
| #ifdef CONFIG_ADB_CUDA |
| static void __noreturn cuda_restart(void) |
| { |
| struct adb_request req; |
| |
| cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM); |
| for (;;) |
| cuda_poll(); |
| } |
| |
| static void __noreturn 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 __noreturn 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: ; |
| } |
| while (1) ; |
| } |
| |
| static void __noreturn 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: ; |
| } |
| while (1) ; |
| } |
| |
| static void __noreturn |
| pmac_halt(void) |
| { |
| pmac_power_off(); |
| } |
| |
| /* |
| * Early initialization. |
| */ |
| static void __init pmac_init(void) |
| { |
| /* Enable early btext debug if requested */ |
| if (strstr(boot_command_line, "btextdbg")) { |
| udbg_adb_init_early(); |
| register_early_udbg_console(); |
| } |
| |
| /* Probe motherboard chipset */ |
| pmac_feature_init(); |
| |
| /* Initialize debug stuff */ |
| udbg_scc_init(!!strstr(boot_command_line, "sccdbg")); |
| udbg_adb_init(!!strstr(boot_command_line, "btextdbg")); |
| |
| #ifdef CONFIG_PPC64 |
| iommu_init_early_dart(&pmac_pci_controller_ops); |
| #endif |
| |
| /* SMP Init has to be done early as we need to patch up |
| * cpu_possible_mask before interrupt stacks are allocated |
| * or kaboom... |
| */ |
| #ifdef CONFIG_SMP |
| pmac_setup_smp(); |
| #endif |
| } |
| |
| static int __init pmac_declare_of_platform_devices(void) |
| { |
| struct device_node *np; |
| |
| np = of_find_node_by_name(NULL, "valkyrie"); |
| if (np) { |
| of_platform_device_create(np, "valkyrie", NULL); |
| of_node_put(np); |
| } |
| np = of_find_node_by_name(NULL, "platinum"); |
| if (np) { |
| of_platform_device_create(np, "platinum", NULL); |
| of_node_put(np); |
| } |
| np = of_find_node_by_type(NULL, "smu"); |
| if (np) { |
| of_platform_device_create(np, "smu", NULL); |
| of_node_put(np); |
| } |
| np = of_find_node_by_type(NULL, "fcu"); |
| if (np == NULL) { |
| /* Some machines have strangely broken device-tree */ |
| np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e"); |
| } |
| if (np) { |
| of_platform_device_create(np, "temperature", NULL); |
| of_node_put(np); |
| } |
| |
| return 0; |
| } |
| machine_device_initcall(powermac, pmac_declare_of_platform_devices); |
| |
| #ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE |
| /* |
| * This is called very early, as part of console_init() (typically just after |
| * time_init()). This function is respondible for trying to find a good |
| * default console on serial ports. It tries to match the open firmware |
| * default output with one of the available serial console drivers. |
| */ |
| static int __init check_pmac_serial_console(void) |
| { |
| struct device_node *prom_stdout = NULL; |
| int offset = 0; |
| const char *name; |
| #ifdef CONFIG_SERIAL_PMACZILOG_TTYS |
| char *devname = "ttyS"; |
| #else |
| char *devname = "ttyPZ"; |
| #endif |
| |
| pr_debug(" -> check_pmac_serial_console()\n"); |
| |
| /* The user has requested a console so this is already set up. */ |
| if (strstr(boot_command_line, "console=")) { |
| pr_debug(" console was specified !\n"); |
| return -EBUSY; |
| } |
| |
| if (!of_chosen) { |
| pr_debug(" of_chosen is NULL !\n"); |
| return -ENODEV; |
| } |
| |
| /* We are getting a weird phandle from OF ... */ |
| /* ... So use the full path instead */ |
| name = of_get_property(of_chosen, "linux,stdout-path", NULL); |
| if (name == NULL) { |
| pr_debug(" no linux,stdout-path !\n"); |
| return -ENODEV; |
| } |
| prom_stdout = of_find_node_by_path(name); |
| if (!prom_stdout) { |
| pr_debug(" can't find stdout package %s !\n", name); |
| return -ENODEV; |
| } |
| pr_debug("stdout is %pOF\n", prom_stdout); |
| |
| if (of_node_name_eq(prom_stdout, "ch-a")) |
| offset = 0; |
| else if (of_node_name_eq(prom_stdout, "ch-b")) |
| offset = 1; |
| else |
| goto not_found; |
| of_node_put(prom_stdout); |
| |
| pr_debug("Found serial console at %s%d\n", devname, offset); |
| |
| return add_preferred_console(devname, offset, NULL); |
| |
| not_found: |
| pr_debug("No preferred console found !\n"); |
| of_node_put(prom_stdout); |
| return -ENODEV; |
| } |
| console_initcall(check_pmac_serial_console); |
| |
| #endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */ |
| |
| /* |
| * Called very early, MMU is off, device-tree isn't unflattened |
| */ |
| static int __init pmac_probe(void) |
| { |
| if (!of_machine_is_compatible("Power Macintosh") && |
| !of_machine_is_compatible("MacRISC")) |
| return 0; |
| |
| #ifdef CONFIG_PPC32 |
| /* isa_io_base gets set in pmac_pci_init */ |
| ISA_DMA_THRESHOLD = ~0L; |
| DMA_MODE_READ = 1; |
| DMA_MODE_WRITE = 2; |
| #endif /* CONFIG_PPC32 */ |
| |
| pm_power_off = pmac_power_off; |
| |
| pmac_init(); |
| |
| return 1; |
| } |
| |
| define_machine(powermac) { |
| .name = "PowerMac", |
| .probe = pmac_probe, |
| .setup_arch = pmac_setup_arch, |
| .show_cpuinfo = pmac_show_cpuinfo, |
| .init_IRQ = pmac_pic_init, |
| .get_irq = NULL, /* changed later */ |
| .pci_irq_fixup = pmac_pci_irq_fixup, |
| .restart = pmac_restart, |
| .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, |
| .progress = udbg_progress, |
| #ifdef CONFIG_PPC64 |
| .power_save = power4_idle, |
| .enable_pmcs = power4_enable_pmcs, |
| #endif /* CONFIG_PPC64 */ |
| #ifdef CONFIG_PPC32 |
| .pcibios_after_init = pmac_pcibios_after_init, |
| .phys_mem_access_prot = pci_phys_mem_access_prot, |
| #endif |
| }; |