d7152fe14c
Currently reset and powerdown are not implemented on the Maple board, and attempting to do so will (incorrectly return). This implements the proper communication with the service processor, allowing correct reset and powerdown on the Maple board, by communicating with the service processor. If somehow it's unable to communicate with the service processor it will loop forever instead. Note that powerdown on the Maple will power down the CPUs, but not the fans or other board components due to hardware and firmware limitations. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Frank Rowand <frowand@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
300 lines
7.4 KiB
C
300 lines
7.4 KiB
C
/*
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* arch/ppc64/kernel/maple_setup.c
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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/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 "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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extern int maple_set_rtc_time(struct rtc_time *tm);
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extern void maple_get_rtc_time(struct rtc_time *tm);
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extern void maple_get_boot_time(struct rtc_time *tm);
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extern void maple_calibrate_decr(void);
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extern void maple_pci_init(void);
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extern void maple_pcibios_fixup(void);
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extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel);
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extern void generic_find_legacy_serial_ports(u64 *physport,
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unsigned int *default_speed);
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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 *rtcs;
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/* find NVRAM device */
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rtcs = find_compatible_devices("nvram", "AMD8111");
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if (rtcs && rtcs->addrs) {
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maple_nvram_base = rtcs->addrs[0].address;
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} else {
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printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
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printk(KERN_EMERG "Maple: Manual Restart Required\n");
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return;
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}
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/* find service processor device */
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rtcs = find_devices("service-processor");
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if (!rtcs) {
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printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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printk(KERN_EMERG "Maple: Manual Restart Required\n");
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return;
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}
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maple_nvram_offset = *(unsigned int*) get_property(rtcs,
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"restart-addr", NULL);
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maple_nvram_command = *(unsigned int*) get_property(rtcs,
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"restart-value", NULL);
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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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}
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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 *rtcs;
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/* find NVRAM device */
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rtcs = find_compatible_devices("nvram", "AMD8111");
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if (rtcs && rtcs->addrs) {
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maple_nvram_base = rtcs->addrs[0].address;
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} else {
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printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
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printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
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return;
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}
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/* find service processor device */
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rtcs = find_devices("service-processor");
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if (!rtcs) {
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printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
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return;
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}
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maple_nvram_offset = *(unsigned int*) get_property(rtcs,
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"power-off-addr", NULL);
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maple_nvram_command = *(unsigned int*) get_property(rtcs,
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"power-off-value", NULL);
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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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}
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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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}
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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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unsigned int default_speed;
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u64 physport;
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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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/* Find the serial port */
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generic_find_legacy_serial_ports(&physport, &default_speed);
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DBG("phys port addr: %lx\n", (long)physport);
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if (physport) {
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void *comport;
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/* Map the uart for udbg. */
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comport = (void *)ioremap(physport, 16);
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udbg_init_uart(comport, default_speed);
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ppc_md.udbg_putc = udbg_putc;
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ppc_md.udbg_getc = udbg_getc;
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ppc_md.udbg_getc_poll = udbg_getc_poll;
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DBG("Hello World !\n");
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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(" <- 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_u3_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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};
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