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Diffstat (limited to 'arch/ppc64/kernel/pmac_setup.c')
-rw-r--r--arch/ppc64/kernel/pmac_setup.c511
1 files changed, 511 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/pmac_setup.c b/arch/ppc64/kernel/pmac_setup.c
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index 000000000000..6cf03d387b91
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+++ b/arch/ppc64/kernel/pmac_setup.c
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+/*
+ * 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..
+ */
+
+#undef DEBUG
+
+#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 <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/machdep.h>
+#include <asm/dma.h>
+#include <asm/btext.h>
+#include <asm/cputable.h>
+#include <asm/pmac_feature.h>
+#include <asm/time.h>
+#include <asm/of_device.h>
+#include <asm/lmb.h>
+#include <asm/smu.h>
+
+#include "pmac.h"
+#include "mpic.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+static int current_root_goodness = -1;
+#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
+
+extern int powersave_nap;
+int sccdbg;
+
+sys_ctrler_t sys_ctrler;
+EXPORT_SYMBOL(sys_ctrler);
+
+#ifdef CONFIG_PMAC_SMU
+unsigned long smu_cmdbuf_abs;
+EXPORT_SYMBOL(smu_cmdbuf_abs);
+#endif
+
+extern void udbg_init_scc(struct device_node *np);
+
+void __pmac pmac_show_cpuinfo(struct seq_file *m)
+{
+ struct device_node *np;
+ char *pp;
+ int plen;
+ char* mbname;
+ int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
+ PMAC_MB_INFO_MODEL, 0);
+ unsigned int 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 = 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);
+
+ /* Indicate newworld */
+ seq_printf(m, "pmac-generation\t: NewWorld\n");
+}
+
+
+void __init pmac_setup_arch(void)
+{
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000;
+
+ /* Probe motherboard chipset */
+ pmac_feature_init();
+#if 0
+ /* Lock-enable the SCC channel used for debug */
+ if (sccdbg) {
+ np = of_find_node_by_name(NULL, "escc");
+ if (np)
+ pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
+ PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
+ }
+#endif
+ /* We can NAP */
+ powersave_nap = 1;
+
+#ifdef CONFIG_ADB_PMU
+ /* Initialize the PMU if any */
+ find_via_pmu();
+#endif
+#ifdef CONFIG_PMAC_SMU
+ /* Initialize the SMU if any */
+ smu_init();
+#endif
+
+ /* Init NVRAM access */
+ pmac_nvram_init();
+
+ /* Setup SMP callback */
+#ifdef CONFIG_SMP
+ pmac_setup_smp();
+#endif
+
+ /* Lookup PCI hosts */
+ pmac_pci_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+}
+
+#ifdef CONFIG_SCSI
+void note_scsi_host(struct device_node *node, void *host)
+{
+ /* Obsolete */
+}
+#endif
+
+
+static int initializing = 1;
+
+static int pmac_late_init(void)
+{
+ initializing = 0;
+ 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)
+{
+ extern dev_t boot_dev;
+ 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 (!boot_dev || dev == boot_dev) {
+ ROOT_DEV = dev + part;
+ boot_dev = 0;
+ current_root_goodness = goodness;
+ }
+}
+
+void __pmac pmac_restart(char *cmd)
+{
+ switch(sys_ctrler) {
+#ifdef CONFIG_ADB_PMU
+ case SYS_CTRLER_PMU:
+ pmu_restart();
+ break;
+#endif
+
+#ifdef CONFIG_PMAC_SMU
+ case SYS_CTRLER_SMU:
+ smu_restart();
+ break;
+#endif
+ default:
+ ;
+ }
+}
+
+void __pmac pmac_power_off(void)
+{
+ switch(sys_ctrler) {
+#ifdef CONFIG_ADB_PMU
+ case SYS_CTRLER_PMU:
+ pmu_shutdown();
+ break;
+#endif
+#ifdef CONFIG_PMAC_SMU
+ case SYS_CTRLER_SMU:
+ smu_shutdown();
+ break;
+#endif
+ default:
+ ;
+ }
+}
+
+void __pmac pmac_halt(void)
+{
+ pmac_power_off();
+}
+
+#ifdef CONFIG_BOOTX_TEXT
+static int dummy_getc_poll(void)
+{
+ return -1;
+}
+
+static unsigned char dummy_getc(void)
+{
+ return 0;
+}
+
+static void btext_putc(unsigned char c)
+{
+ btext_drawchar(c);
+}
+
+static void __init init_boot_display(void)
+{
+ char *name;
+ struct device_node *np = NULL;
+ int rc = -ENODEV;
+
+ printk("trying to initialize btext ...\n");
+
+ name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
+ if (name != NULL) {
+ np = of_find_node_by_path(name);
+ if (np != NULL) {
+ if (strcmp(np->type, "display") != 0) {
+ printk("boot stdout isn't a display !\n");
+ of_node_put(np);
+ np = NULL;
+ }
+ }
+ }
+ if (np)
+ rc = btext_initialize(np);
+ if (rc == 0)
+ return;
+
+ for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
+ if (get_property(np, "linux,opened", NULL)) {
+ printk("trying %s ...\n", np->full_name);
+ rc = btext_initialize(np);
+ printk("result: %d\n", rc);
+ }
+ if (rc == 0)
+ return;
+ }
+}
+#endif /* CONFIG_BOOTX_TEXT */
+
+/*
+ * Early initialization.
+ */
+void __init pmac_init_early(void)
+{
+ DBG(" -> pmac_init_early\n");
+
+ /* 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);
+ }
+
+ else {
+#ifdef CONFIG_BOOTX_TEXT
+ init_boot_display();
+
+ ppc_md.udbg_putc = btext_putc;
+ ppc_md.udbg_getc = dummy_getc;
+ ppc_md.udbg_getc_poll = dummy_getc_poll;
+#endif /* CONFIG_BOOTX_TEXT */
+ }
+
+ /* Setup interrupt mapping options */
+ ppc64_interrupt_controller = IC_OPEN_PIC;
+
+ iommu_init_early_u3();
+
+ DBG(" <- pmac_init_early\n");
+}
+
+static int pmac_u3_cascade(struct pt_regs *regs, void *data)
+{
+ return mpic_get_one_irq((struct mpic *)data, regs);
+}
+
+static __init void pmac_init_IRQ(void)
+{
+ struct device_node *irqctrler = NULL;
+ struct device_node *irqctrler2 = NULL;
+ struct device_node *np = NULL;
+ struct mpic *mpic1, *mpic2;
+
+ /* We first try to detect Apple's new Core99 chipset, since mac-io
+ * is quite different on those machines and contains an IBM MPIC2.
+ */
+ while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
+ struct device_node *parent = of_get_parent(np);
+ if (parent && !strcmp(parent->name, "u3"))
+ irqctrler2 = of_node_get(np);
+ else
+ irqctrler = of_node_get(np);
+ of_node_put(parent);
+ }
+ if (irqctrler != NULL && irqctrler->n_addrs > 0) {
+ unsigned char senses[128];
+
+ printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
+ (unsigned int)irqctrler->addrs[0].address);
+
+ prom_get_irq_senses(senses, 0, 128);
+ mpic1 = mpic_alloc(irqctrler->addrs[0].address,
+ MPIC_PRIMARY | MPIC_WANTS_RESET,
+ 0, 0, 128, 256, senses, 128, " K2-MPIC ");
+ BUG_ON(mpic1 == NULL);
+ mpic_init(mpic1);
+
+ if (irqctrler2 != NULL && irqctrler2->n_intrs > 0 &&
+ irqctrler2->n_addrs > 0) {
+ printk(KERN_INFO "Slave OpenPIC at 0x%08x hooked on IRQ %d\n",
+ (u32)irqctrler2->addrs[0].address,
+ irqctrler2->intrs[0].line);
+
+ pmac_call_feature(PMAC_FTR_ENABLE_MPIC, irqctrler2, 0, 0);
+ prom_get_irq_senses(senses, 128, 128 + 128);
+
+ /* We don't need to set MPIC_BROKEN_U3 here since we don't have
+ * hypertransport interrupts routed to it
+ */
+ mpic2 = mpic_alloc(irqctrler2->addrs[0].address,
+ MPIC_BIG_ENDIAN | MPIC_WANTS_RESET,
+ 0, 128, 128, 0, senses, 128, " U3-MPIC ");
+ BUG_ON(mpic2 == NULL);
+ mpic_init(mpic2);
+ mpic_setup_cascade(irqctrler2->intrs[0].line,
+ pmac_u3_cascade, mpic2);
+ }
+ }
+ of_node_put(irqctrler);
+ of_node_put(irqctrler2);
+}
+
+static void __init pmac_progress(char *s, unsigned short hex)
+{
+ if (sccdbg) {
+ udbg_puts(s);
+ udbg_puts("\n");
+ }
+#ifdef CONFIG_BOOTX_TEXT
+ else if (boot_text_mapped) {
+ btext_drawstring(s);
+ btext_drawstring("\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;
+
+ 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;
+ }
+ }
+
+ 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)
+{
+ 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();
+
+#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;
+}
+
+struct machdep_calls __initdata pmac_md = {
+#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_die = generic_mach_cpu_die,
+#endif
+ .probe = pmac_probe,
+ .setup_arch = pmac_setup_arch,
+ .init_early = pmac_init_early,
+ .get_cpuinfo = pmac_show_cpuinfo,
+ .init_IRQ = pmac_init_IRQ,
+ .get_irq = mpic_get_irq,
+ .pcibios_fixup = pmac_pcibios_fixup,
+ .restart = pmac_restart,
+ .power_off = pmac_power_off,
+ .halt = pmac_halt,
+ .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 = pmac_progress,
+ .check_legacy_ioport = pmac_check_legacy_ioport
+};
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