powerpc: Merge maple support code to arch/powerpc/platforms/maple

Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 295 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
new file mode 100644
index 000000000000..7ece8983a105
--- /dev/null
+++ b/arch/powerpc/platforms/maple/setup.c
@@ -0,0 +1,295 @@
+/*
+ *  Maple (970 eval board) setup code
+ *
+ *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
+ *                     IBM Corp. 
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  as published by the Free Software Foundation; either version
+ *  2 of the License, or (at your option) any later version.
+ *
+ */
+
+#define DEBUG
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/major.h>
+#include <linux/initrd.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <linux/ide.h>
+#include <linux/pci.h>
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <linux/pmu.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/serial.h>
+#include <linux/smp.h>
+
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/machdep.h>
+#include <asm/dma.h>
+#include <asm/cputable.h>
+#include <asm/time.h>
+#include <asm/of_device.h>
+#include <asm/lmb.h>
+#include <asm/mpic.h>
+#include <asm/udbg.h>
+
+#include "maple.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+extern void generic_find_legacy_serial_ports(u64 *physport,
+                unsigned int *default_speed);
+
+static void maple_restart(char *cmd)
+{
+        unsigned int maple_nvram_base;
+        unsigned int maple_nvram_offset;
+        unsigned int maple_nvram_command;
+        struct device_node *rtcs;
+
+        /* find NVRAM device */
+        rtcs = find_compatible_devices("nvram", "AMD8111");
+        if (rtcs && rtcs->addrs) {
+                maple_nvram_base = rtcs->addrs[0].address;
+        } else {
+                printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
+                printk(KERN_EMERG "Maple: Manual Restart Required\n");
+                return;
+        }
+
+        /* find service processor device */
+        rtcs = find_devices("service-processor");
+        if (!rtcs) {
+                printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
+                printk(KERN_EMERG "Maple: Manual Restart Required\n");
+                return;
+        }
+        maple_nvram_offset = *(unsigned int*) get_property(rtcs,
+                        "restart-addr", NULL);
+        maple_nvram_command = *(unsigned int*) get_property(rtcs,
+                        "restart-value", NULL);
+
+        /* send command */
+        outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
+        for (;;) ;
+}
+
+static void maple_power_off(void)
+{
+        unsigned int maple_nvram_base;
+        unsigned int maple_nvram_offset;
+        unsigned int maple_nvram_command;
+        struct device_node *rtcs;
+
+        /* find NVRAM device */
+        rtcs = find_compatible_devices("nvram", "AMD8111");
+        if (rtcs && rtcs->addrs) {
+                maple_nvram_base = rtcs->addrs[0].address;
+        } else {
+                printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
+                printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
+                return;
+        }
+
+        /* find service processor device */
+        rtcs = find_devices("service-processor");
+        if (!rtcs) {
+                printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
+                printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
+                return;
+        }
+        maple_nvram_offset = *(unsigned int*) get_property(rtcs,
+                        "power-off-addr", NULL);
+        maple_nvram_command = *(unsigned int*) get_property(rtcs,
+                        "power-off-value", NULL);
+
+        /* send command */
+        outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
+        for (;;) ;
+}
+
+static void maple_halt(void)
+{
+        maple_power_off();
+}
+
+#ifdef CONFIG_SMP
+struct smp_ops_t maple_smp_ops = {
+        .probe          = smp_mpic_probe,
+        .message_pass   = smp_mpic_message_pass,
+        .kick_cpu       = smp_generic_kick_cpu,
+        .setup_cpu      = smp_mpic_setup_cpu,
+        .give_timebase  = smp_generic_give_timebase,
+        .take_timebase  = smp_generic_take_timebase,
+};
+#endif /* CONFIG_SMP */
+
+void __init maple_setup_arch(void)
+{
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000;
+
+        /* Setup SMP callback */
+#ifdef CONFIG_SMP
+        smp_ops = &maple_smp_ops;
+#endif
+        /* Lookup PCI hosts */
+        maple_pci_init();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+        conswitchp = &dummy_con;
+#endif
+
+        printk(KERN_INFO "Using native/NAP idle loop\n");
+}
+
+/* 
+ * Early initialization.
+ */
+static void __init maple_init_early(void)
+{
+        unsigned int default_speed;
+        u64 physport;
+
+        DBG(" -> maple_init_early\n");
+
+        /* Initialize hash table, from now on, we can take hash faults
+         * and call ioremap
+         */
+        hpte_init_native();
+
+        /* Find the serial port */
+        generic_find_legacy_serial_ports(&physport, &default_speed);
+
+        DBG("phys port addr: %lx\n", (long)physport);
+
+        if (physport) {
+                void *comport;
+                /* Map the uart for udbg. */
+                comport = (void *)ioremap(physport, 16);
+                udbg_init_uart(comport, default_speed);
+
+                DBG("Hello World !\n");
+        }
+
+        /* Setup interrupt mapping options */
+        ppc64_interrupt_controller = IC_OPEN_PIC;
+
+        iommu_init_early_u3();
+
+        DBG(" <- maple_init_early\n");
+}
+
+
+static __init void maple_init_IRQ(void)
+{
+        struct device_node *root;
+        unsigned int *opprop;
+        unsigned long opic_addr;
+        struct mpic *mpic;
+        unsigned char senses[128];
+        int n;
+
+        DBG(" -> maple_init_IRQ\n");
+
+        /* XXX: Non standard, replace that with a proper openpic/mpic node
+         * in the device-tree. Find the Open PIC if present */
+        root = of_find_node_by_path("/");
+        opprop = (unsigned int *) get_property(root,
+                                "platform-open-pic", NULL);
+        if (opprop == 0)
+                panic("OpenPIC not found !\n");
+
+        n = prom_n_addr_cells(root);
+        for (opic_addr = 0; n > 0; --n)
+                opic_addr = (opic_addr << 32) + *opprop++;
+        of_node_put(root);
+
+        /* Obtain sense values from device-tree */
+        prom_get_irq_senses(senses, 0, 128);
+
+        mpic = mpic_alloc(opic_addr,
+                          MPIC_PRIMARY | MPIC_BIG_ENDIAN |
+                          MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
+                          0, 0, 128, 128, senses, 128, "U3-MPIC");
+        BUG_ON(mpic == NULL);
+        mpic_init(mpic);
+
+        DBG(" <- maple_init_IRQ\n");
+}
+
+static void __init maple_progress(char *s, unsigned short hex)
+{
+        printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+static int __init maple_probe(int platform)
+{
+        if (platform != PLATFORM_MAPLE)
+                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();
+
+        return 1;
+}
+
+struct machdep_calls __initdata maple_md = {
+        .probe                  = maple_probe,
+        .setup_arch             = maple_setup_arch,
+        .init_early             = maple_init_early,
+        .init_IRQ               = maple_init_IRQ,
+        .get_irq                = mpic_get_irq,
+        .pcibios_fixup          = maple_pcibios_fixup,
+        .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
+        .restart                = maple_restart,
+        .power_off              = maple_power_off,
+        .halt                   = maple_halt,
+        .get_boot_time          = maple_get_boot_time,
+        .set_rtc_time           = maple_set_rtc_time,
+        .get_rtc_time           = maple_get_rtc_time,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = maple_progress,
+        .idle_loop              = native_idle,
+};