1 files changed, 612 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/pSeries_setup.c b/arch/ppc64/kernel/pSeries_setup.c
new file mode 100644
index 000000000000..06536de51257
--- /dev/null
+++ b/arch/ppc64/kernel/pSeries_setup.c
@@ -0,0 +1,612 @@
+/*
+ *  linux/arch/ppc/kernel/setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ *  Modified by PPC64 Team, 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.
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#undef DEBUG
+
+#include <linux/config.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/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/console.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/time.h>
+#include <asm/nvram.h>
+#include <asm/plpar_wrappers.h>
+#include <asm/xics.h>
+#include <asm/cputable.h>
+
+#include "i8259.h"
+#include "mpic.h"
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+extern void pSeries_final_fixup(void);
+
+extern void pSeries_get_boot_time(struct rtc_time *rtc_time);
+extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
+extern int  pSeries_set_rtc_time(struct rtc_time *rtc_time);
+extern void find_udbg_vterm(void);
+extern void system_reset_fwnmi(void);   /* from head.S */
+extern void machine_check_fwnmi(void);  /* from head.S */
+extern void generic_find_legacy_serial_ports(u64 *physport,
+                unsigned int *default_speed);
+
+int fwnmi_active;  /* TRUE if an FWNMI handler is present */
+
+extern unsigned long ppc_proc_freq;
+extern unsigned long ppc_tb_freq;
+
+extern void pSeries_system_reset_exception(struct pt_regs *regs);
+extern int pSeries_machine_check_exception(struct pt_regs *regs);
+
+static volatile void __iomem * chrp_int_ack_special;
+struct mpic *pSeries_mpic;
+
+void pSeries_get_cpuinfo(struct seq_file *m)
+{
+        struct device_node *root;
+        const char *model = "";
+
+        root = of_find_node_by_path("/");
+        if (root)
+                model = get_property(root, "model", NULL);
+        seq_printf(m, "machine\t\t: CHRP %s\n", model);
+        of_node_put(root);
+}
+
+/* Initialize firmware assisted non-maskable interrupts if
+ * the firmware supports this feature.
+ *
+ */
+static void __init fwnmi_init(void)
+{
+        int ret;
+        int ibm_nmi_register = rtas_token("ibm,nmi-register");
+        if (ibm_nmi_register == RTAS_UNKNOWN_SERVICE)
+                return;
+        ret = rtas_call(ibm_nmi_register, 2, 1, NULL,
+                        __pa((unsigned long)system_reset_fwnmi),
+                        __pa((unsigned long)machine_check_fwnmi));
+        if (ret == 0)
+                fwnmi_active = 1;
+}
+
+static int pSeries_irq_cascade(struct pt_regs *regs, void *data)
+{
+        if (chrp_int_ack_special)
+                return readb(chrp_int_ack_special);
+        else
+                return i8259_irq(smp_processor_id());
+}
+
+static void __init pSeries_init_mpic(void)
+{
+        unsigned int *addrp;
+        struct device_node *np;
+        int i;
+
+        /* All ISUs are setup, complete initialization */
+        mpic_init(pSeries_mpic);
+
+        /* Check what kind of cascade ACK we have */
+        if (!(np = of_find_node_by_name(NULL, "pci"))
+            || !(addrp = (unsigned int *)
+                 get_property(np, "8259-interrupt-acknowledge", NULL)))
+                printk(KERN_ERR "Cannot find pci to get ack address\n");
+        else
+                chrp_int_ack_special = ioremap(addrp[prom_n_addr_cells(np)-1], 1);
+        of_node_put(np);
+
+        /* Setup the legacy interrupts & controller */
+        for (i = 0; i < NUM_ISA_INTERRUPTS; i++)
+                irq_desc[i].handler = &i8259_pic;
+        i8259_init(0);
+
+        /* Hook cascade to mpic */
+        mpic_setup_cascade(NUM_ISA_INTERRUPTS, pSeries_irq_cascade, NULL);
+}
+
+static void __init pSeries_setup_mpic(void)
+{
+        unsigned int *opprop;
+        unsigned long openpic_addr = 0;
+        unsigned char senses[NR_IRQS - NUM_ISA_INTERRUPTS];
+        struct device_node *root;
+        int irq_count;
+
+        /* 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) {
+                int n = prom_n_addr_cells(root);
+
+                for (openpic_addr = 0; n > 0; --n)
+                        openpic_addr = (openpic_addr << 32) + *opprop++;
+                printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
+        }
+        of_node_put(root);
+
+        BUG_ON(openpic_addr == 0);
+
+        /* Get the sense values from OF */
+        prom_get_irq_senses(senses, NUM_ISA_INTERRUPTS, NR_IRQS);
+        
+        /* Setup the openpic driver */
+        irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
+        pSeries_mpic = mpic_alloc(openpic_addr, MPIC_PRIMARY,
+                                  16, 16, irq_count, /* isu size, irq offset, irq count */ 
+                                  NR_IRQS - 4, /* ipi offset */
+                                  senses, irq_count, /* sense & sense size */
+                                  " MPIC     ");
+}
+
+static void __init pSeries_setup_arch(void)
+{
+        /* Fixup ppc_md depending on the type of interrupt controller */
+        if (ppc64_interrupt_controller == IC_OPEN_PIC) {
+                ppc_md.init_IRQ       = pSeries_init_mpic; 
+                ppc_md.get_irq        = mpic_get_irq;
+                /* Allocate the mpic now, so that find_and_init_phbs() can
+                 * fill the ISUs */
+                pSeries_setup_mpic();
+        } else {
+                ppc_md.init_IRQ       = xics_init_IRQ;
+                ppc_md.get_irq        = xics_get_irq;
+        }
+
+#ifdef CONFIG_SMP
+        smp_init_pSeries();
+#endif
+        /* openpic global configuration register (64-bit format). */
+        /* openpic Interrupt Source Unit pointer (64-bit format). */
+        /* python0 facility area (mmio) (64-bit format) REAL address. */
+
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000;
+
+        if (ROOT_DEV == 0) {
+                printk("No ramdisk, default root is /dev/sda2\n");
+                ROOT_DEV = Root_SDA2;
+        }
+
+        fwnmi_init();
+
+        /* Find and initialize PCI host bridges */
+        init_pci_config_tokens();
+        eeh_init();
+        find_and_init_phbs();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+        conswitchp = &dummy_con;
+#endif
+
+        pSeries_nvram_init();
+
+        if (cur_cpu_spec->firmware_features & FW_FEATURE_SPLPAR)
+                vpa_init(boot_cpuid);
+}
+
+static int __init pSeries_init_panel(void)
+{
+        /* Manually leave the kernel version on the panel. */
+        ppc_md.progress("Linux ppc64\n", 0);
+        ppc_md.progress(UTS_RELEASE, 0);
+
+        return 0;
+}
+arch_initcall(pSeries_init_panel);
+
+
+/* Build up the firmware_features bitmask field
+ * using contents of device-tree/ibm,hypertas-functions.
+ * Ultimately this functionality may be moved into prom.c prom_init().
+ */
+void __init fw_feature_init(void)
+{
+        struct device_node * dn;
+        char * hypertas;
+        unsigned int len;
+
+        DBG(" -> fw_feature_init()\n");
+
+        cur_cpu_spec->firmware_features = 0;
+        dn = of_find_node_by_path("/rtas");
+        if (dn == NULL) {
+                printk(KERN_ERR "WARNING ! Cannot find RTAS in device-tree !\n");
+                goto no_rtas;
+        }
+
+        hypertas = get_property(dn, "ibm,hypertas-functions", &len);
+        if (hypertas) {
+                while (len > 0){
+                        int i, hypertas_len;
+                        /* check value against table of strings */
+                        for(i=0; i < FIRMWARE_MAX_FEATURES ;i++) {
+                                if ((firmware_features_table[i].name) &&
+                                    (strcmp(firmware_features_table[i].name,hypertas))==0) {
+                                        /* we have a match */
+                                        cur_cpu_spec->firmware_features |= 
+                                                (firmware_features_table[i].val);
+                                        break;
+                                } 
+                        }
+                        hypertas_len = strlen(hypertas);
+                        len -= hypertas_len +1;
+                        hypertas+= hypertas_len +1;
+                }
+        }
+
+        of_node_put(dn);
+ no_rtas:
+        printk(KERN_INFO "firmware_features = 0x%lx\n", 
+               cur_cpu_spec->firmware_features);
+
+        DBG(" <- fw_feature_init()\n");
+}
+
+
+static  void __init pSeries_discover_pic(void)
+{
+        struct device_node *np;
+        char *typep;
+
+        /*
+         * Setup interrupt mapping options that are needed for finish_device_tree
+         * to properly parse the OF interrupt tree & do the virtual irq mapping
+         */
+        __irq_offset_value = NUM_ISA_INTERRUPTS;
+        ppc64_interrupt_controller = IC_INVALID;
+        for (np = NULL; (np = of_find_node_by_name(np, "interrupt-controller"));) {
+                typep = (char *)get_property(np, "compatible", NULL);
+                if (strstr(typep, "open-pic"))
+                        ppc64_interrupt_controller = IC_OPEN_PIC;
+                else if (strstr(typep, "ppc-xicp"))
+                        ppc64_interrupt_controller = IC_PPC_XIC;
+                else
+                        printk("pSeries_discover_pic: failed to recognize"
+                               " interrupt-controller\n");
+                break;
+        }
+}
+
+static void pSeries_mach_cpu_die(void)
+{
+        local_irq_disable();
+        idle_task_exit();
+        /* Some hardware requires clearing the CPPR, while other hardware does not
+         * it is safe either way
+         */
+        pSeriesLP_cppr_info(0, 0);
+        rtas_stop_self();
+        /* Should never get here... */
+        BUG();
+        for(;;);
+}
+
+
+/*
+ * Early initialization.  Relocation is on but do not reference unbolted pages
+ */
+static void __init pSeries_init_early(void)
+{
+        void *comport;
+        int iommu_off = 0;
+        unsigned int default_speed;
+        u64 physport;
+
+        DBG(" -> pSeries_init_early()\n");
+
+        fw_feature_init();
+        
+        if (systemcfg->platform & PLATFORM_LPAR)
+                hpte_init_lpar();
+        else {
+                hpte_init_native();
+                iommu_off = (of_chosen &&
+                             get_property(of_chosen, "linux,iommu-off", NULL));
+        }
+
+        generic_find_legacy_serial_ports(&physport, &default_speed);
+
+        if (systemcfg->platform & PLATFORM_LPAR)
+                find_udbg_vterm();
+        else if (physport) {
+                /* Map the uart for udbg. */
+                comport = (void *)__ioremap(physport, 16, _PAGE_NO_CACHE);
+                udbg_init_uart(comport, default_speed);
+
+                ppc_md.udbg_putc = udbg_putc;
+                ppc_md.udbg_getc = udbg_getc;
+                ppc_md.udbg_getc_poll = udbg_getc_poll;
+                DBG("Hello World !\n");
+        }
+
+
+        iommu_init_early_pSeries();
+
+        pSeries_discover_pic();
+
+        DBG(" <- pSeries_init_early()\n");
+}
+
+
+static void pSeries_progress(char *s, unsigned short hex)
+{
+        struct device_node *root;
+        int width, *p;
+        char *os;
+        static int display_character, set_indicator;
+        static int max_width;
+        static DEFINE_SPINLOCK(progress_lock);
+        static int pending_newline = 0;  /* did last write end with unprinted newline? */
+
+        if (!rtas.base)
+                return;
+
+        if (max_width == 0) {
+                if ((root = find_path_device("/rtas")) &&
+                     (p = (unsigned int *)get_property(root,
+                                                       "ibm,display-line-length",
+                                                       NULL)))
+                        max_width = *p;
+                else
+                        max_width = 0x10;
+                display_character = rtas_token("display-character");
+                set_indicator = rtas_token("set-indicator");
+        }
+
+        if (display_character == RTAS_UNKNOWN_SERVICE) {
+                /* use hex display if available */
+                if (set_indicator != RTAS_UNKNOWN_SERVICE)
+                        rtas_call(set_indicator, 3, 1, NULL, 6, 0, hex);
+                return;
+        }
+
+        spin_lock(&progress_lock);
+
+        /*
+         * Last write ended with newline, but we didn't print it since
+         * it would just clear the bottom line of output. Print it now
+         * instead.
+         *
+         * If no newline is pending, print a CR to start output at the
+         * beginning of the line.
+         */
+        if (pending_newline) {
+                rtas_call(display_character, 1, 1, NULL, '\r');
+                rtas_call(display_character, 1, 1, NULL, '\n');
+                pending_newline = 0;
+        } else {
+                rtas_call(display_character, 1, 1, NULL, '\r');
+        }
+ 
+        width = max_width;
+        os = s;
+        while (*os) {
+                if (*os == '\n' || *os == '\r') {
+                        /* Blank to end of line. */
+                        while (width-- > 0)
+                                rtas_call(display_character, 1, 1, NULL, ' ');
+ 
+                        /* If newline is the last character, save it
+                         * until next call to avoid bumping up the
+                         * display output.
+                         */
+                        if (*os == '\n' && !os[1]) {
+                                pending_newline = 1;
+                                spin_unlock(&progress_lock);
+                                return;
+                        }
+ 
+                        /* RTAS wants CR-LF, not just LF */
+ 
+                        if (*os == '\n') {
+                                rtas_call(display_character, 1, 1, NULL, '\r');
+                                rtas_call(display_character, 1, 1, NULL, '\n');
+                        } else {
+                                /* CR might be used to re-draw a line, so we'll
+                                 * leave it alone and not add LF.
+                                 */
+                                rtas_call(display_character, 1, 1, NULL, *os);
+                        }
+ 
+                        width = max_width;
+                } else {
+                        width--;
+                        rtas_call(display_character, 1, 1, NULL, *os);
+                }
+ 
+                os++;
+ 
+                /* if we overwrite the screen length */
+                if (width <= 0)
+                        while ((*os != 0) && (*os != '\n') && (*os != '\r'))
+                                os++;
+        }
+ 
+        /* Blank to end of line. */
+        while (width-- > 0)
+                rtas_call(display_character, 1, 1, NULL, ' ');
+
+        spin_unlock(&progress_lock);
+}
+
+extern void setup_default_decr(void);
+
+/* Some sane defaults: 125 MHz timebase, 1GHz processor */
+#define DEFAULT_TB_FREQ         125000000UL
+#define DEFAULT_PROC_FREQ       (DEFAULT_TB_FREQ * 8)
+
+static void __init pSeries_calibrate_decr(void)
+{
+        struct device_node *cpu;
+        struct div_result divres;
+        unsigned int *fp;
+        int node_found;
+
+        /*
+         * The cpu node should have a timebase-frequency property
+         * to tell us the rate at which the decrementer counts.
+         */
+        cpu = of_find_node_by_type(NULL, "cpu");
+
+        ppc_tb_freq = DEFAULT_TB_FREQ;          /* hardcoded default */
+        node_found = 0;
+        if (cpu != 0) {
+                fp = (unsigned int *)get_property(cpu, "timebase-frequency",
+                                                  NULL);
+                if (fp != 0) {
+                        node_found = 1;
+                        ppc_tb_freq = *fp;
+                }
+        }
+        if (!node_found)
+                printk(KERN_ERR "WARNING: Estimating decrementer frequency "
+                                "(not found)\n");
+
+        ppc_proc_freq = DEFAULT_PROC_FREQ;
+        node_found = 0;
+        if (cpu != 0) {
+                fp = (unsigned int *)get_property(cpu, "clock-frequency",
+                                                  NULL);
+                if (fp != 0) {
+                        node_found = 1;
+                        ppc_proc_freq = *fp;
+                }
+        }
+        if (!node_found)
+                printk(KERN_ERR "WARNING: Estimating processor frequency "
+                                "(not found)\n");
+
+        of_node_put(cpu);
+
+        printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
+               ppc_tb_freq/1000000, ppc_tb_freq%1000000);
+        printk(KERN_INFO "time_init: processor frequency   = %lu.%.6lu MHz\n",
+               ppc_proc_freq/1000000, ppc_proc_freq%1000000);
+
+        tb_ticks_per_jiffy = ppc_tb_freq / HZ;
+        tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
+        tb_ticks_per_usec = ppc_tb_freq / 1000000;
+        tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
+        div128_by_32(1024*1024, 0, tb_ticks_per_sec, &divres);
+        tb_to_xs = divres.result_low;
+
+        setup_default_decr();
+}
+
+static int pSeries_check_legacy_ioport(unsigned int baseport)
+{
+        struct device_node *np;
+
+#define I8042_DATA_REG  0x60
+#define FDC_BASE        0x3f0
+
+
+        switch(baseport) {
+        case I8042_DATA_REG:
+                np = of_find_node_by_type(NULL, "8042");
+                if (np == NULL)
+                        return -ENODEV;
+                of_node_put(np);
+                break;
+        case FDC_BASE:
+                np = of_find_node_by_type(NULL, "fdc");
+                if (np == NULL)
+                        return -ENODEV;
+                of_node_put(np);
+                break;
+        }
+        return 0;
+}
+
+/*
+ * Called very early, MMU is off, device-tree isn't unflattened
+ */
+extern struct machdep_calls pSeries_md;
+
+static int __init pSeries_probe(int platform)
+{
+        if (platform != PLATFORM_PSERIES &&
+            platform != PLATFORM_PSERIES_LPAR)
+                return 0;
+
+        /* if we have some ppc_md fixups for LPAR to do, do
+         * it here ...
+         */
+
+        return 1;
+}
+
+struct machdep_calls __initdata pSeries_md = {
+        .probe                  = pSeries_probe,
+        .setup_arch             = pSeries_setup_arch,
+        .init_early             = pSeries_init_early,
+        .get_cpuinfo            = pSeries_get_cpuinfo,
+        .log_error              = pSeries_log_error,
+        .pcibios_fixup          = pSeries_final_fixup,
+        .restart                = rtas_restart,
+        .power_off              = rtas_power_off,
+        .halt                   = rtas_halt,
+        .panic                  = rtas_os_term,
+        .cpu_die                = pSeries_mach_cpu_die,
+        .get_boot_time          = pSeries_get_boot_time,
+        .get_rtc_time           = pSeries_get_rtc_time,
+        .set_rtc_time           = pSeries_set_rtc_time,
+        .calibrate_decr         = pSeries_calibrate_decr,
+        .progress               = pSeries_progress,
+        .check_legacy_ioport    = pSeries_check_legacy_ioport,
+        .system_reset_exception = pSeries_system_reset_exception,
+        .machine_check_exception = pSeries_machine_check_exception,
+};