cebf589c82
Add support for the integrated interrupt controller on BPA CPUs. There is one of those for each SMT thread. The mapping of interrupt numbers to HW interrupt sources is described in arch/ppc64/kernel/bpa_iic.h. This version hardcodes the 'Spider' chip as the secondary interrupt controller. That is not really generic for the architecture, but at the moment it is the only secondary PIC that exists. A little more work will be needed on this as soon as we have boards with multiple external interrupt controllers. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
139 lines
3 KiB
C
139 lines
3 KiB
C
/*
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* linux/arch/ppc/kernel/bpa_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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* Modified by PPC64 Team, IBM Corp
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* Modified by BPA Team, IBM Deutschland Entwicklung GmbH
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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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#undef DEBUG
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#include <linux/config.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/slab.h>
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#include <linux/user.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/delay.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/console.h>
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#include <asm/mmu.h>
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#include <asm/processor.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/rtas.h>
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#include <asm/pci-bridge.h>
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#include <asm/iommu.h>
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#include <asm/dma.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/nvram.h>
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#include <asm/cputable.h>
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#include "pci.h"
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#include "bpa_iic.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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void bpa_get_cpuinfo(struct seq_file *m)
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{
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struct device_node *root;
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const char *model = "";
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root = of_find_node_by_path("/");
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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: BPA %s\n", model);
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of_node_put(root);
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}
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static void bpa_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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static void __init bpa_setup_arch(void)
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{
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ppc_md.init_IRQ = iic_init_IRQ;
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ppc_md.get_irq = iic_get_irq;
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#ifdef CONFIG_SMP
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smp_init_pSeries();
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#endif
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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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if (ROOT_DEV == 0) {
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printk("No ramdisk, default root is /dev/hda2\n");
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ROOT_DEV = Root_HDA2;
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}
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/* Find and initialize PCI host bridges */
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init_pci_config_tokens();
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find_and_init_phbs();
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spider_init_IRQ();
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#ifdef CONFIG_DUMMY_CONSOLE
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conswitchp = &dummy_con;
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#endif
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bpa_nvram_init();
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}
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/*
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* Early initialization. Relocation is on but do not reference unbolted pages
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*/
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static void __init bpa_init_early(void)
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{
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DBG(" -> bpa_init_early()\n");
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hpte_init_native();
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pci_direct_iommu_init();
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ppc64_interrupt_controller = IC_BPA_IIC;
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DBG(" <- bpa_init_early()\n");
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}
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static int __init bpa_probe(int platform)
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{
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if (platform != PLATFORM_BPA)
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return 0;
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return 1;
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}
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struct machdep_calls __initdata bpa_md = {
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.probe = bpa_probe,
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.setup_arch = bpa_setup_arch,
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.init_early = bpa_init_early,
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.get_cpuinfo = bpa_get_cpuinfo,
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.restart = rtas_restart,
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.power_off = rtas_power_off,
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.halt = rtas_halt,
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.get_boot_time = rtas_get_boot_time,
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.get_rtc_time = rtas_get_rtc_time,
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.set_rtc_time = rtas_set_rtc_time,
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.calibrate_decr = generic_calibrate_decr,
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.progress = bpa_progress,
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};
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