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-rw-r--r--arch/ppc64/kernel/pSeries_setup.c622
1 files changed, 0 insertions, 622 deletions
diff --git a/arch/ppc64/kernel/pSeries_setup.c b/arch/ppc64/kernel/pSeries_setup.c
deleted file mode 100644
index 5a9fe96f9f6..00000000000
--- a/arch/ppc64/kernel/pSeries_setup.c
+++ /dev/null
@@ -1,622 +0,0 @@
-/*
- * 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/cpu.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/utsname.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/firmware.h>
-#include <asm/pmc.h>
-#include <asm/mpic.h>
-#include <asm/ppc-pci.h>
-
-#include "i8259.h"
-
-#ifdef DEBUG
-#define DBG(fmt...) udbg_printf(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-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 void pSeries_system_reset_exception(struct pt_regs *regs);
-extern int pSeries_machine_check_exception(struct pt_regs *regs);
-
-static int pseries_shared_idle(void);
-static int pseries_dedicated_idle(void);
-
-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 pseries_lpar_enable_pmcs(void)
-{
- unsigned long set, reset;
-
- power4_enable_pmcs();
-
- set = 1UL << 63;
- reset = 0;
- plpar_hcall_norets(H_PERFMON, set, reset);
-
- /* instruct hypervisor to maintain PMCs */
- if (firmware_has_feature(FW_FEATURE_SPLPAR))
- get_paca()->lppaca.pmcregs_in_use = 1;
-}
-
-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;
- ppc_md.cpu_irq_down = mpic_teardown_this_cpu;
- /* 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;
- ppc_md.cpu_irq_down = xics_teardown_cpu;
- }
-
-#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();
- find_and_init_phbs();
- eeh_init();
-
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
- pSeries_nvram_init();
-
- /* Choose an idle loop */
- if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
- vpa_init(boot_cpuid);
- if (get_paca()->lppaca.shared_proc) {
- printk(KERN_INFO "Using shared processor idle loop\n");
- ppc_md.idle_loop = pseries_shared_idle;
- } else {
- printk(KERN_INFO "Using dedicated idle loop\n");
- ppc_md.idle_loop = pseries_dedicated_idle;
- }
- } else {
- printk(KERN_INFO "Using default idle loop\n");
- ppc_md.idle_loop = default_idle;
- }
-
- if (systemcfg->platform & PLATFORM_LPAR)
- ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
- else
- ppc_md.enable_pmcs = power4_enable_pmcs;
-}
-
-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(system_utsname.version, 0);
-
- return 0;
-}
-arch_initcall(pSeries_init_panel);
-
-
-/* Build up the ppc64_firmware_features bitmask field
- * using contents of device-tree/ibm,hypertas-functions.
- * Ultimately this functionality may be moved into prom.c prom_init().
- */
-static void __init fw_feature_init(void)
-{
- struct device_node * dn;
- char * hypertas;
- unsigned int len;
-
- DBG(" -> fw_feature_init()\n");
-
- ppc64_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 */
- ppc64_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",
- ppc64_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);
- udbg_init_uart(comport, default_speed);
-
- DBG("Hello World !\n");
- }
-
-
- iommu_init_early_pSeries();
-
- pSeries_discover_pic();
-
- DBG(" <- pSeries_init_early()\n");
-}
-
-
-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;
-}
-
-DECLARE_PER_CPU(unsigned long, smt_snooze_delay);
-
-static inline void dedicated_idle_sleep(unsigned int cpu)
-{
- struct paca_struct *ppaca = &paca[cpu ^ 1];
-
- /* Only sleep if the other thread is not idle */
- if (!(ppaca->lppaca.idle)) {
- local_irq_disable();
-
- /*
- * We are about to sleep the thread and so wont be polling any
- * more.
- */
- clear_thread_flag(TIF_POLLING_NRFLAG);
-
- /*
- * SMT dynamic mode. Cede will result in this thread going
- * dormant, if the partner thread is still doing work. Thread
- * wakes up if partner goes idle, an interrupt is presented, or
- * a prod occurs. Returning from the cede enables external
- * interrupts.
- */
- if (!need_resched())
- cede_processor();
- else
- local_irq_enable();
- } else {
- /*
- * Give the HV an opportunity at the processor, since we are
- * not doing any work.
- */
- poll_pending();
- }
-}
-
-static int pseries_dedicated_idle(void)
-{
- long oldval;
- struct paca_struct *lpaca = get_paca();
- unsigned int cpu = smp_processor_id();
- unsigned long start_snooze;
- unsigned long *smt_snooze_delay = &__get_cpu_var(smt_snooze_delay);
-
- while (1) {
- /*
- * Indicate to the HV that we are idle. Now would be
- * a good time to find other work to dispatch.
- */
- lpaca->lppaca.idle = 1;
-
- oldval = test_and_clear_thread_flag(TIF_NEED_RESCHED);
- if (!oldval) {
- set_thread_flag(TIF_POLLING_NRFLAG);
-
- start_snooze = __get_tb() +
- *smt_snooze_delay * tb_ticks_per_usec;
-
- while (!need_resched() && !cpu_is_offline(cpu)) {
- ppc64_runlatch_off();
-
- /*
- * Go into low thread priority and possibly
- * low power mode.
- */
- HMT_low();
- HMT_very_low();
-
- if (*smt_snooze_delay != 0 &&
- __get_tb() > start_snooze) {
- HMT_medium();
- dedicated_idle_sleep(cpu);
- }
-
- }
-
- HMT_medium();
- clear_thread_flag(TIF_POLLING_NRFLAG);
- } else {
- set_need_resched();
- }
-
- lpaca->lppaca.idle = 0;
- ppc64_runlatch_on();
-
- schedule();
-
- if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
- cpu_die();
- }
-}
-
-static int pseries_shared_idle(void)
-{
- struct paca_struct *lpaca = get_paca();
- unsigned int cpu = smp_processor_id();
-
- while (1) {
- /*
- * Indicate to the HV that we are idle. Now would be
- * a good time to find other work to dispatch.
- */
- lpaca->lppaca.idle = 1;
-
- while (!need_resched() && !cpu_is_offline(cpu)) {
- local_irq_disable();
- ppc64_runlatch_off();
-
- /*
- * Yield the processor to the hypervisor. We return if
- * an external interrupt occurs (which are driven prior
- * to returning here) or if a prod occurs from another
- * processor. When returning here, external interrupts
- * are enabled.
- *
- * Check need_resched() again with interrupts disabled
- * to avoid a race.
- */
- if (!need_resched())
- cede_processor();
- else
- local_irq_enable();
-
- HMT_medium();
- }
-
- lpaca->lppaca.idle = 0;
- ppc64_runlatch_on();
-
- schedule();
-
- if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
- cpu_die();
- }
-
- return 0;
-}
-
-static int pSeries_pci_probe_mode(struct pci_bus *bus)
-{
- if (systemcfg->platform & PLATFORM_LPAR)
- return PCI_PROBE_DEVTREE;
- return PCI_PROBE_NORMAL;
-}
-
-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,
- .pci_probe_mode = pSeries_pci_probe_mode,
- .irq_bus_setup = pSeries_irq_bus_setup,
- .restart = rtas_restart,
- .power_off = rtas_power_off,
- .halt = rtas_halt,
- .panic = rtas_os_term,
- .cpu_die = pSeries_mach_cpu_die,
- .get_boot_time = rtas_get_boot_time,
- .get_rtc_time = rtas_get_rtc_time,
- .set_rtc_time = rtas_set_rtc_time,
- .calibrate_decr = generic_calibrate_decr,
- .progress = rtas_progress,
- .check_legacy_ioport = pSeries_check_legacy_ioport,
- .system_reset_exception = pSeries_system_reset_exception,
- .machine_check_exception = pSeries_machine_check_exception,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-23 12:44:28 +0000