512 lines
11 KiB
C
512 lines
11 KiB
C
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/*
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* arch/ppc/platforms/setup.c
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*
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* PowerPC version
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Adapted for Power Macintosh by Paul Mackerras
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* Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
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*
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* Derived from "arch/alpha/kernel/setup.c"
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* Copyright (C) 1995 Linus Torvalds
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*
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* Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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/*
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* bootup setup stuff..
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*/
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#undef DEBUG
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#include <linux/config.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/a.out.h>
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#include <linux/tty.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/major.h>
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#include <linux/initrd.h>
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#include <linux/vt_kern.h>
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#include <linux/console.h>
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#include <linux/ide.h>
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#include <linux/pci.h>
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#include <linux/adb.h>
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#include <linux/cuda.h>
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#include <linux/pmu.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/root_dev.h>
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#include <linux/bitops.h>
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#include <asm/processor.h>
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#include <asm/sections.h>
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#include <asm/prom.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/pci-bridge.h>
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#include <asm/iommu.h>
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#include <asm/machdep.h>
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#include <asm/dma.h>
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#include <asm/btext.h>
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#include <asm/cputable.h>
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#include <asm/pmac_feature.h>
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#include <asm/time.h>
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#include <asm/of_device.h>
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#include <asm/lmb.h>
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#include <asm/smu.h>
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#include "pmac.h"
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#include "mpic.h"
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#ifdef DEBUG
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#define DBG(fmt...) udbg_printf(fmt)
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#else
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#define DBG(fmt...)
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#endif
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static int current_root_goodness = -1;
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#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */
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extern int powersave_nap;
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int sccdbg;
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sys_ctrler_t sys_ctrler;
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EXPORT_SYMBOL(sys_ctrler);
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#ifdef CONFIG_PMAC_SMU
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unsigned long smu_cmdbuf_abs;
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EXPORT_SYMBOL(smu_cmdbuf_abs);
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#endif
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extern void udbg_init_scc(struct device_node *np);
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void __pmac pmac_show_cpuinfo(struct seq_file *m)
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{
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struct device_node *np;
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char *pp;
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int plen;
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char* mbname;
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int mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
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PMAC_MB_INFO_MODEL, 0);
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unsigned int mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
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PMAC_MB_INFO_FLAGS, 0);
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if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
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(long)&mbname) != 0)
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mbname = "Unknown";
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/* find motherboard type */
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seq_printf(m, "machine\t\t: ");
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np = find_devices("device-tree");
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if (np != NULL) {
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pp = (char *) get_property(np, "model", NULL);
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if (pp != NULL)
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seq_printf(m, "%s\n", pp);
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else
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seq_printf(m, "PowerMac\n");
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pp = (char *) get_property(np, "compatible", &plen);
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if (pp != NULL) {
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seq_printf(m, "motherboard\t:");
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while (plen > 0) {
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int l = strlen(pp) + 1;
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seq_printf(m, " %s", pp);
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plen -= l;
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pp += l;
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}
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seq_printf(m, "\n");
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}
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} else
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seq_printf(m, "PowerMac\n");
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/* print parsed model */
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seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
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seq_printf(m, "pmac flags\t: %08x\n", mbflags);
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/* Indicate newworld */
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seq_printf(m, "pmac-generation\t: NewWorld\n");
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}
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void __init pmac_setup_arch(void)
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{
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/* init to some ~sane value until calibrate_delay() runs */
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loops_per_jiffy = 50000000;
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/* Probe motherboard chipset */
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pmac_feature_init();
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#if 0
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/* Lock-enable the SCC channel used for debug */
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if (sccdbg) {
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np = of_find_node_by_name(NULL, "escc");
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if (np)
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pmac_call_feature(PMAC_FTR_SCC_ENABLE, np,
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PMAC_SCC_ASYNC | PMAC_SCC_FLAG_XMON, 1);
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}
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#endif
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/* We can NAP */
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powersave_nap = 1;
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#ifdef CONFIG_ADB_PMU
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/* Initialize the PMU if any */
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find_via_pmu();
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#endif
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#ifdef CONFIG_PMAC_SMU
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/* Initialize the SMU if any */
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smu_init();
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#endif
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/* Init NVRAM access */
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pmac_nvram_init();
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/* Setup SMP callback */
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#ifdef CONFIG_SMP
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pmac_setup_smp();
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#endif
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/* Lookup PCI hosts */
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pmac_pci_init();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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}
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#ifdef CONFIG_SCSI
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void note_scsi_host(struct device_node *node, void *host)
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{
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/* Obsolete */
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}
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#endif
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static int initializing = 1;
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static int pmac_late_init(void)
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{
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initializing = 0;
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return 0;
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}
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late_initcall(pmac_late_init);
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/* can't be __init - can be called whenever a disk is first accessed */
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void __pmac note_bootable_part(dev_t dev, int part, int goodness)
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{
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extern dev_t boot_dev;
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char *p;
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if (!initializing)
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return;
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if ((goodness <= current_root_goodness) &&
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ROOT_DEV != DEFAULT_ROOT_DEVICE)
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return;
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p = strstr(saved_command_line, "root=");
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if (p != NULL && (p == saved_command_line || p[-1] == ' '))
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return;
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if (!boot_dev || dev == boot_dev) {
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ROOT_DEV = dev + part;
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boot_dev = 0;
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current_root_goodness = goodness;
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}
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}
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void __pmac pmac_restart(char *cmd)
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{
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switch(sys_ctrler) {
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#ifdef CONFIG_ADB_PMU
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case SYS_CTRLER_PMU:
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pmu_restart();
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break;
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#endif
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#ifdef CONFIG_PMAC_SMU
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case SYS_CTRLER_SMU:
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smu_restart();
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break;
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#endif
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default:
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;
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}
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}
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void __pmac pmac_power_off(void)
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{
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switch(sys_ctrler) {
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#ifdef CONFIG_ADB_PMU
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case SYS_CTRLER_PMU:
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pmu_shutdown();
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break;
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#endif
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#ifdef CONFIG_PMAC_SMU
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case SYS_CTRLER_SMU:
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smu_shutdown();
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break;
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#endif
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default:
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;
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}
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}
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void __pmac pmac_halt(void)
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{
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pmac_power_off();
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}
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#ifdef CONFIG_BOOTX_TEXT
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static int dummy_getc_poll(void)
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{
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return -1;
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}
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static unsigned char dummy_getc(void)
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{
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return 0;
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}
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static void btext_putc(unsigned char c)
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{
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btext_drawchar(c);
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}
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static void __init init_boot_display(void)
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{
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char *name;
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struct device_node *np = NULL;
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int rc = -ENODEV;
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printk("trying to initialize btext ...\n");
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name = (char *)get_property(of_chosen, "linux,stdout-path", NULL);
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if (name != NULL) {
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np = of_find_node_by_path(name);
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if (np != NULL) {
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if (strcmp(np->type, "display") != 0) {
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printk("boot stdout isn't a display !\n");
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of_node_put(np);
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np = NULL;
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}
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}
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}
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if (np)
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rc = btext_initialize(np);
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if (rc == 0)
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return;
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for (np = NULL; (np = of_find_node_by_type(np, "display"));) {
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if (get_property(np, "linux,opened", NULL)) {
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printk("trying %s ...\n", np->full_name);
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rc = btext_initialize(np);
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printk("result: %d\n", rc);
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}
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if (rc == 0)
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return;
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}
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}
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#endif /* CONFIG_BOOTX_TEXT */
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/*
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* Early initialization.
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*/
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void __init pmac_init_early(void)
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{
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DBG(" -> pmac_init_early\n");
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/* Initialize hash table, from now on, we can take hash faults
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* and call ioremap
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*/
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hpte_init_native();
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/* Init SCC */
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if (strstr(cmd_line, "sccdbg")) {
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sccdbg = 1;
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udbg_init_scc(NULL);
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}
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else {
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#ifdef CONFIG_BOOTX_TEXT
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init_boot_display();
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ppc_md.udbg_putc = btext_putc;
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ppc_md.udbg_getc = dummy_getc;
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ppc_md.udbg_getc_poll = dummy_getc_poll;
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#endif /* CONFIG_BOOTX_TEXT */
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}
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/* Setup interrupt mapping options */
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ppc64_interrupt_controller = IC_OPEN_PIC;
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iommu_init_early_u3();
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DBG(" <- pmac_init_early\n");
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}
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static int pmac_u3_cascade(struct pt_regs *regs, void *data)
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{
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return mpic_get_one_irq((struct mpic *)data, regs);
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}
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static __init void pmac_init_IRQ(void)
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{
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struct device_node *irqctrler = NULL;
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struct device_node *irqctrler2 = NULL;
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struct device_node *np = NULL;
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struct mpic *mpic1, *mpic2;
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/* We first try to detect Apple's new Core99 chipset, since mac-io
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* is quite different on those machines and contains an IBM MPIC2.
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*/
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while ((np = of_find_node_by_type(np, "open-pic")) != NULL) {
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struct device_node *parent = of_get_parent(np);
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if (parent && !strcmp(parent->name, "u3"))
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irqctrler2 = of_node_get(np);
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else
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irqctrler = of_node_get(np);
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of_node_put(parent);
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}
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if (irqctrler != NULL && irqctrler->n_addrs > 0) {
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unsigned char senses[128];
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printk(KERN_INFO "PowerMac using OpenPIC irq controller at 0x%08x\n",
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(unsigned int)irqctrler->addrs[0].address);
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prom_get_irq_senses(senses, 0, 128);
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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
|
||
|
|
};
|