2005-10-26 04:45:56 -07:00
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/*
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* arch/ppc/platforms/setup.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Adapted from 'alpha' version by Gary Thomas
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* Modified by Cort Dougan (cort@cs.nmt.edu)
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*/
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/*
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* bootup setup stuff..
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*/
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#include <linux/config.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/major.h>
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#include <linux/interrupt.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/version.h>
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#include <linux/adb.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/ide.h>
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#include <linux/console.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/initrd.h>
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#include <linux/module.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/prom.h>
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#include <asm/gg2.h>
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#include <asm/pci-bridge.h>
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#include <asm/dma.h>
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#include <asm/machdep.h>
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#include <asm/irq.h>
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#include <asm/hydra.h>
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#include <asm/sections.h>
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#include <asm/time.h>
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#include <asm/btext.h>
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#include <asm/i8259.h>
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#include <asm/mpic.h>
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#include <asm/rtas.h>
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#include <asm/xmon.h>
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2005-10-28 17:46:19 -07:00
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#include "chrp.h"
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2005-10-26 04:45:56 -07:00
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void rtas_indicator_progress(char *, unsigned short);
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void btext_progress(char *, unsigned short);
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int _chrp_type;
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EXPORT_SYMBOL(_chrp_type);
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struct mpic *chrp_mpic;
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/*
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* XXX this should be in xmon.h, but putting it there means xmon.h
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* has to include <linux/interrupt.h> (to get irqreturn_t), which
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* causes all sorts of problems. -- paulus
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*/
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extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);
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extern unsigned long loops_per_jiffy;
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#ifdef CONFIG_SMP
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extern struct smp_ops_t chrp_smp_ops;
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#endif
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static const char *gg2_memtypes[4] = {
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"FPM", "SDRAM", "EDO", "BEDO"
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};
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static const char *gg2_cachesizes[4] = {
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"256 KB", "512 KB", "1 MB", "Reserved"
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};
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static const char *gg2_cachetypes[4] = {
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"Asynchronous", "Reserved", "Flow-Through Synchronous",
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"Pipelined Synchronous"
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};
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static const char *gg2_cachemodes[4] = {
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"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
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};
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void chrp_show_cpuinfo(struct seq_file *m)
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{
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int i, sdramen;
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unsigned int t;
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struct device_node *root;
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const char *model = "";
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root = find_path_device("/");
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if (root)
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model = get_property(root, "model", NULL);
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seq_printf(m, "machine\t\t: CHRP %s\n", model);
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/* longtrail (goldengate) stuff */
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if (!strncmp(model, "IBM,LongTrail", 13)) {
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/* VLSI VAS96011/12 `Golden Gate 2' */
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/* Memory banks */
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sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
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>>31) & 1;
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for (i = 0; i < (sdramen ? 4 : 6); i++) {
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t = in_le32(gg2_pci_config_base+
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GG2_PCI_DRAM_BANK0+
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i*4);
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if (!(t & 1))
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continue;
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switch ((t>>8) & 0x1f) {
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case 0x1f:
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model = "4 MB";
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break;
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case 0x1e:
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model = "8 MB";
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break;
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case 0x1c:
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model = "16 MB";
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break;
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case 0x18:
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model = "32 MB";
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break;
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case 0x10:
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model = "64 MB";
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break;
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case 0x00:
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model = "128 MB";
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break;
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default:
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model = "Reserved";
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break;
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}
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seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
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gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
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}
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/* L2 cache */
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t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
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seq_printf(m, "board l2\t: %s %s (%s)\n",
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gg2_cachesizes[(t>>7) & 3],
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gg2_cachetypes[(t>>2) & 3],
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gg2_cachemodes[t & 3]);
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}
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}
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/*
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* Fixes for the National Semiconductor PC78308VUL SuperI/O
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*
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* Some versions of Open Firmware incorrectly initialize the IRQ settings
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* for keyboard and mouse
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*/
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static inline void __init sio_write(u8 val, u8 index)
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{
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outb(index, 0x15c);
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outb(val, 0x15d);
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}
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static inline u8 __init sio_read(u8 index)
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{
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outb(index, 0x15c);
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return inb(0x15d);
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}
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static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
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u8 type)
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{
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u8 level0, type0, active;
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/* select logical device */
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sio_write(device, 0x07);
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active = sio_read(0x30);
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level0 = sio_read(0x70);
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type0 = sio_read(0x71);
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if (level0 != level || type0 != type || !active) {
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printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
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"remapping to level %d, type %d, active\n",
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name, level0, type0, !active ? "in" : "", level, type);
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sio_write(0x01, 0x30);
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sio_write(level, 0x70);
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sio_write(type, 0x71);
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}
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}
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static void __init sio_init(void)
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{
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struct device_node *root;
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if ((root = find_path_device("/")) &&
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!strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
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/* logical device 0 (KBC/Keyboard) */
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sio_fixup_irq("keyboard", 0, 1, 2);
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/* select logical device 1 (KBC/Mouse) */
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sio_fixup_irq("mouse", 1, 12, 2);
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}
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}
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static void __init pegasos_set_l2cr(void)
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{
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struct device_node *np;
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/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
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if (_chrp_type != _CHRP_Pegasos)
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return;
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/* Enable L2 cache if needed */
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np = find_type_devices("cpu");
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if (np != NULL) {
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unsigned int *l2cr = (unsigned int *)
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get_property (np, "l2cr", NULL);
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if (l2cr == NULL) {
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printk ("Pegasos l2cr : no cpu l2cr property found\n");
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return;
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}
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if (!((*l2cr) & 0x80000000)) {
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printk ("Pegasos l2cr : L2 cache was not active, "
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"activating\n");
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_set_L2CR(0);
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_set_L2CR((*l2cr) | 0x80000000);
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}
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}
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}
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void __init chrp_setup_arch(void)
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{
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struct device_node *root = find_path_device ("/");
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char *machine = NULL;
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struct device_node *device;
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unsigned int *p = NULL;
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/* init to some ~sane value until calibrate_delay() runs */
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loops_per_jiffy = 50000000/HZ;
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if (root)
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machine = get_property(root, "model", NULL);
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if (machine && strncmp(machine, "Pegasos", 7) == 0) {
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_chrp_type = _CHRP_Pegasos;
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} else if (machine && strncmp(machine, "IBM", 3) == 0) {
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_chrp_type = _CHRP_IBM;
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} else if (machine && strncmp(machine, "MOT", 3) == 0) {
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_chrp_type = _CHRP_Motorola;
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} else {
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/* Let's assume it is an IBM chrp if all else fails */
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_chrp_type = _CHRP_IBM;
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}
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printk("chrp type = %x\n", _chrp_type);
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rtas_initialize();
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if (rtas_token("display-character") >= 0)
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ppc_md.progress = rtas_progress;
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#ifdef CONFIG_BOOTX_TEXT
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if (ppc_md.progress == NULL && boot_text_mapped)
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ppc_md.progress = btext_progress;
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#endif
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#ifdef CONFIG_BLK_DEV_INITRD
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/* this is fine for chrp */
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initrd_below_start_ok = 1;
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if (initrd_start)
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ROOT_DEV = Root_RAM0;
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else
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#endif
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ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
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/* On pegasos, enable the L2 cache if not already done by OF */
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pegasos_set_l2cr();
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/* Lookup PCI host bridges */
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chrp_find_bridges();
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/*
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* Temporary fixes for PCI devices.
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* -- Geert
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*/
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hydra_init(); /* Mac I/O */
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/*
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* Fix the Super I/O configuration
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*/
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sio_init();
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/* Get the event scan rate for the rtas so we know how
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* often it expects a heartbeat. -- Cort
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*/
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device = find_devices("rtas");
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if (device)
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p = (unsigned int *) get_property
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(device, "rtas-event-scan-rate", NULL);
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if (p && *p) {
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ppc_md.heartbeat = chrp_event_scan;
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ppc_md.heartbeat_reset = HZ / (*p * 30) - 1;
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ppc_md.heartbeat_count = 1;
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printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
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*p, ppc_md.heartbeat_reset);
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}
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pci_create_OF_bus_map();
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/*
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* Print the banner, then scroll down so boot progress
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* can be printed. -- Cort
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*/
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if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
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}
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void
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chrp_event_scan(void)
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{
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unsigned char log[1024];
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int ret = 0;
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/* XXX: we should loop until the hardware says no more error logs -- Cort */
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rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
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__pa(log), 1024);
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ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
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}
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/*
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* Finds the open-pic node and sets up the mpic driver.
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*/
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static void __init chrp_find_openpic(void)
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{
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struct device_node *np, *root;
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int len, i, j, irq_count;
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int isu_size, idu_size;
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unsigned int *iranges, *opprop = NULL;
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int oplen = 0;
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unsigned long opaddr;
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int na = 1;
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unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
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np = find_type_devices("open-pic");
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if (np == NULL)
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return;
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root = find_path_device("/");
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if (root) {
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opprop = (unsigned int *) get_property
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(root, "platform-open-pic", &oplen);
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na = prom_n_addr_cells(root);
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}
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if (opprop && oplen >= na * sizeof(unsigned int)) {
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opaddr = opprop[na-1]; /* assume 32-bit */
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oplen /= na * sizeof(unsigned int);
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} else {
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if (np->n_addrs == 0)
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return;
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opaddr = np->addrs[0].address;
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oplen = 0;
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}
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printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
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irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
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prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS - 4);
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iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
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if (iranges == NULL)
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len = 0; /* non-distributed mpic */
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else
|
|
|
|
len /= 2 * sizeof(unsigned int);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* The first pair of cells in interrupt-ranges refers to the
|
|
|
|
* IDU; subsequent pairs refer to the ISUs.
|
|
|
|
*/
|
|
|
|
if (oplen < len) {
|
|
|
|
printk(KERN_ERR "Insufficient addresses for distributed"
|
|
|
|
" OpenPIC (%d < %d)\n", np->n_addrs, len);
|
|
|
|
len = oplen;
|
|
|
|
}
|
|
|
|
|
|
|
|
isu_size = 0;
|
|
|
|
idu_size = 0;
|
|
|
|
if (len > 0 && iranges[1] != 0) {
|
|
|
|
printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
|
|
|
|
iranges[0], iranges[0] + iranges[1] - 1);
|
|
|
|
idu_size = iranges[1];
|
|
|
|
}
|
|
|
|
if (len > 1)
|
|
|
|
isu_size = iranges[3];
|
|
|
|
|
|
|
|
chrp_mpic = mpic_alloc(opaddr, MPIC_PRIMARY,
|
|
|
|
isu_size, NUM_ISA_INTERRUPTS, irq_count,
|
|
|
|
NR_IRQS - 4, init_senses, irq_count,
|
|
|
|
" MPIC ");
|
|
|
|
if (chrp_mpic == NULL) {
|
|
|
|
printk(KERN_ERR "Failed to allocate MPIC structure\n");
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
j = na - 1;
|
|
|
|
for (i = 1; i < len; ++i) {
|
|
|
|
iranges += 2;
|
|
|
|
j += na;
|
|
|
|
printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
|
|
|
|
iranges[0], iranges[0] + iranges[1] - 1,
|
|
|
|
opprop[j]);
|
|
|
|
mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
|
|
|
|
}
|
|
|
|
|
|
|
|
mpic_init(chrp_mpic);
|
|
|
|
mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
|
|
|
|
static struct irqaction xmon_irqaction = {
|
|
|
|
.handler = xmon_irq,
|
|
|
|
.mask = CPU_MASK_NONE,
|
|
|
|
.name = "XMON break",
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void __init chrp_init_IRQ(void)
|
|
|
|
{
|
|
|
|
struct device_node *np;
|
|
|
|
unsigned long chrp_int_ack = 0;
|
|
|
|
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
|
|
|
|
struct device_node *kbd;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
for (np = find_devices("pci"); np != NULL; np = np->next) {
|
|
|
|
unsigned int *addrp = (unsigned int *)
|
|
|
|
get_property(np, "8259-interrupt-acknowledge", NULL);
|
|
|
|
|
|
|
|
if (addrp == NULL)
|
|
|
|
continue;
|
|
|
|
chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (np == NULL)
|
|
|
|
printk(KERN_ERR "Cannot find PCI interrupt acknowledge address\n");
|
|
|
|
|
|
|
|
chrp_find_openpic();
|
|
|
|
|
|
|
|
i8259_init(chrp_int_ack, 0);
|
|
|
|
|
|
|
|
if (_chrp_type == _CHRP_Pegasos)
|
|
|
|
ppc_md.get_irq = i8259_irq;
|
|
|
|
else
|
|
|
|
ppc_md.get_irq = mpic_get_irq;
|
|
|
|
|
|
|
|
#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
|
|
|
|
/* see if there is a keyboard in the device tree
|
|
|
|
with a parent of type "adb" */
|
|
|
|
for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
|
|
|
|
if (kbd->parent && kbd->parent->type
|
|
|
|
&& strcmp(kbd->parent->type, "adb") == 0)
|
|
|
|
break;
|
|
|
|
if (kbd)
|
|
|
|
setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init
|
|
|
|
chrp_init2(void)
|
|
|
|
{
|
2005-10-28 17:46:19 -07:00
|
|
|
#ifdef CONFIG_NVRAM
|
|
|
|
chrp_nvram_init();
|
|
|
|
#endif
|
|
|
|
|
2005-10-26 04:45:56 -07:00
|
|
|
request_region(0x20,0x20,"pic1");
|
|
|
|
request_region(0xa0,0x20,"pic2");
|
|
|
|
request_region(0x00,0x20,"dma1");
|
|
|
|
request_region(0x40,0x20,"timer");
|
|
|
|
request_region(0x80,0x10,"dma page reg");
|
|
|
|
request_region(0xc0,0x20,"dma2");
|
|
|
|
|
|
|
|
if (ppc_md.progress)
|
|
|
|
ppc_md.progress(" Have fun! ", 0x7777);
|
|
|
|
}
|
|
|
|
|
|
|
|
void __init chrp_init(void)
|
|
|
|
{
|
|
|
|
ISA_DMA_THRESHOLD = ~0L;
|
|
|
|
DMA_MODE_READ = 0x44;
|
|
|
|
DMA_MODE_WRITE = 0x48;
|
|
|
|
isa_io_base = CHRP_ISA_IO_BASE; /* default value */
|
|
|
|
ppc_do_canonicalize_irqs = 1;
|
|
|
|
|
|
|
|
/* Assume we have an 8259... */
|
|
|
|
__irq_offset_value = NUM_ISA_INTERRUPTS;
|
|
|
|
|
|
|
|
ppc_md.setup_arch = chrp_setup_arch;
|
|
|
|
ppc_md.show_cpuinfo = chrp_show_cpuinfo;
|
|
|
|
|
|
|
|
ppc_md.init_IRQ = chrp_init_IRQ;
|
|
|
|
ppc_md.init = chrp_init2;
|
|
|
|
|
|
|
|
ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
|
|
|
|
|
|
|
|
ppc_md.restart = rtas_restart;
|
|
|
|
ppc_md.power_off = rtas_power_off;
|
|
|
|
ppc_md.halt = rtas_halt;
|
|
|
|
|
|
|
|
ppc_md.time_init = chrp_time_init;
|
|
|
|
ppc_md.set_rtc_time = chrp_set_rtc_time;
|
|
|
|
ppc_md.get_rtc_time = chrp_get_rtc_time;
|
|
|
|
ppc_md.calibrate_decr = chrp_calibrate_decr;
|
|
|
|
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
smp_ops = &chrp_smp_ops;
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_BOOTX_TEXT
|
|
|
|
void
|
|
|
|
btext_progress(char *s, unsigned short hex)
|
|
|
|
{
|
|
|
|
btext_drawstring(s);
|
|
|
|
btext_drawstring("\n");
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_BOOTX_TEXT */
|