300 lines
7.1 KiB
C
300 lines
7.1 KiB
C
/*
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* Maple (970 eval board) setup code
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*
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* (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
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* IBM Corp.
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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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#define 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/serial.h>
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#include <linux/smp.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/pgtable.h>
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#include <asm/bitops.h>
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#include <asm/io.h>
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#include <asm/kexec.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/cputable.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/mpic.h>
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#include <asm/udbg.h>
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#include "maple.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 unsigned long maple_find_nvram_base(void)
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{
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struct device_node *rtcs;
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unsigned long result = 0;
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/* find NVRAM device */
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rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
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if (rtcs) {
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struct resource r;
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if (of_address_to_resource(rtcs, 0, &r)) {
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printk(KERN_EMERG "Maple: Unable to translate NVRAM"
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" address\n");
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goto bail;
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}
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if (!(r.flags & IORESOURCE_IO)) {
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printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
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goto bail;
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}
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result = r.start;
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} else
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printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
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bail:
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of_node_put(rtcs);
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return result;
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}
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static void maple_restart(char *cmd)
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{
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unsigned int maple_nvram_base;
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unsigned int maple_nvram_offset;
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unsigned int maple_nvram_command;
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struct device_node *sp;
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maple_nvram_base = maple_find_nvram_base();
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if (maple_nvram_base == 0)
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goto fail;
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/* find service processor device */
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sp = of_find_node_by_name(NULL, "service-processor");
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if (!sp) {
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printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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goto fail;
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}
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maple_nvram_offset = *(unsigned int*) get_property(sp,
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"restart-addr", NULL);
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maple_nvram_command = *(unsigned int*) get_property(sp,
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"restart-value", NULL);
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of_node_put(sp);
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/* send command */
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outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
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for (;;) ;
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fail:
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printk(KERN_EMERG "Maple: Manual Restart Required\n");
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}
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static void maple_power_off(void)
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{
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unsigned int maple_nvram_base;
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unsigned int maple_nvram_offset;
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unsigned int maple_nvram_command;
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struct device_node *sp;
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maple_nvram_base = maple_find_nvram_base();
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if (maple_nvram_base == 0)
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goto fail;
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/* find service processor device */
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sp = of_find_node_by_name(NULL, "service-processor");
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if (!sp) {
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printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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goto fail;
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}
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maple_nvram_offset = *(unsigned int*) get_property(sp,
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"power-off-addr", NULL);
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maple_nvram_command = *(unsigned int*) get_property(sp,
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"power-off-value", NULL);
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of_node_put(sp);
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/* send command */
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outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
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for (;;) ;
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fail:
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printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
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}
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static void maple_halt(void)
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{
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maple_power_off();
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}
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#ifdef CONFIG_SMP
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struct smp_ops_t maple_smp_ops = {
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.probe = smp_mpic_probe,
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.message_pass = smp_mpic_message_pass,
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.kick_cpu = smp_generic_kick_cpu,
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.setup_cpu = smp_mpic_setup_cpu,
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.give_timebase = smp_generic_give_timebase,
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.take_timebase = smp_generic_take_timebase,
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};
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#endif /* CONFIG_SMP */
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void __init maple_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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/* Setup SMP callback */
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#ifdef CONFIG_SMP
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smp_ops = &maple_smp_ops;
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#endif
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/* Lookup PCI hosts */
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maple_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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printk(KERN_INFO "Using native/NAP idle loop\n");
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}
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/*
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* Early initialization.
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*/
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static void __init maple_init_early(void)
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{
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DBG(" -> maple_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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/* Setup interrupt mapping options */
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ppc64_interrupt_controller = IC_OPEN_PIC;
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iommu_init_early_dart();
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DBG(" <- maple_init_early\n");
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}
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static __init void maple_init_IRQ(void)
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{
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struct device_node *root;
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unsigned int *opprop;
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unsigned long opic_addr;
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struct mpic *mpic;
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unsigned char senses[128];
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int n;
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DBG(" -> maple_init_IRQ\n");
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/* XXX: Non standard, replace that with a proper openpic/mpic node
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* in the device-tree. Find the Open PIC if present */
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root = of_find_node_by_path("/");
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opprop = (unsigned int *) get_property(root,
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"platform-open-pic", NULL);
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if (opprop == 0)
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panic("OpenPIC not found !\n");
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n = prom_n_addr_cells(root);
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for (opic_addr = 0; n > 0; --n)
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opic_addr = (opic_addr << 32) + *opprop++;
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of_node_put(root);
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/* Obtain sense values from device-tree */
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prom_get_irq_senses(senses, 0, 128);
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mpic = mpic_alloc(opic_addr,
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MPIC_PRIMARY | MPIC_BIG_ENDIAN |
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MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
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0, 0, 128, 128, senses, 128, "U3-MPIC");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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DBG(" <- maple_init_IRQ\n");
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}
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static void __init maple_progress(char *s, unsigned short hex)
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{
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printk("*** %04x : %s\n", hex, s ? s : "");
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}
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init maple_probe(int platform)
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{
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if (platform != PLATFORM_MAPLE)
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return 0;
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/*
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* On U3, the DART (iommu) must be allocated now since it
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* has an impact on htab_initialize (due to the large page it
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* occupies having to be broken up so the DART itself is not
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* part of the cacheable linar mapping
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*/
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alloc_dart_table();
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return 1;
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}
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struct machdep_calls __initdata maple_md = {
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.probe = maple_probe,
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.setup_arch = maple_setup_arch,
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.init_early = maple_init_early,
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.init_IRQ = maple_init_IRQ,
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.get_irq = mpic_get_irq,
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.pcibios_fixup = maple_pcibios_fixup,
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.pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
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.restart = maple_restart,
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.power_off = maple_power_off,
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.halt = maple_halt,
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.get_boot_time = maple_get_boot_time,
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.set_rtc_time = maple_set_rtc_time,
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.get_rtc_time = maple_get_rtc_time,
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.calibrate_decr = generic_calibrate_decr,
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.progress = maple_progress,
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.idle_loop = native_idle,
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#ifdef CONFIG_KEXEC
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.machine_kexec = default_machine_kexec,
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.machine_kexec_prepare = default_machine_kexec_prepare,
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.machine_crash_shutdown = default_machine_crash_shutdown,
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#endif
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};
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