1 files changed, 663 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
new file mode 100644
index 000000000000..1b12bf9956cb
--- /dev/null
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -0,0 +1,663 @@
+/*
+ *  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"
+
+#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);
+
+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;
+
+#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_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
+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");
+                }
+        }
+}
+
+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
+}
+
+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->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
+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_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_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_halt(void)
+{
+        pmac_power_off();
+}
+
+void __init pmac_init(void)
+{
+        /* 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.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",
+                                                          NULL);
+                                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",
+                                                          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);
+
+        return 0;
+}
+
+device_initcall(pmac_declare_of_platform_devices);