/*
- * linux/arch/ppc/kernel/setup.c
+ * 64-bit pSeries and RS/6000 setup code.
*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/irq.h>
+#include <asm/kexec.h>
#include <asm/time.h>
#include <asm/nvram.h>
-#include <asm/plpar_wrappers.h>
-#include <asm/xics.h>
+#include "xics.h"
#include <asm/firmware.h>
#include <asm/pmc.h>
#include <asm/mpic.h>
#include <asm/ppc-pci.h>
#include <asm/i8259.h>
#include <asm/udbg.h>
+#include <asm/smp.h>
+
+#include "plpar_wrappers.h"
+#include "ras.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(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 void pseries_shared_idle(void);
static void pseries_dedicated_idle(void);
-static volatile void __iomem * chrp_int_ack_special;
struct mpic *pSeries_mpic;
-void pSeries_show_cpuinfo(struct seq_file *m)
+static void pSeries_show_cpuinfo(struct seq_file *m)
{
struct device_node *root;
const char *model = "";
/* Initialize firmware assisted non-maskable interrupts if
* the firmware supports this feature.
- *
*/
static void __init fwnmi_init(void)
{
- int ret;
+ unsigned long system_reset_addr, machine_check_addr;
+
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(regs);
+ /* If the kernel's not linked at zero we point the firmware at low
+ * addresses anyway, and use a trampoline to get to the real code. */
+ system_reset_addr = __pa(system_reset_fwnmi) - PHYSICAL_START;
+ machine_check_addr = __pa(machine_check_fwnmi) - PHYSICAL_START;
+
+ if (0 == rtas_call(ibm_nmi_register, 2, 1, NULL, system_reset_addr,
+ machine_check_addr))
+ fwnmi_active = 1;
}
static void __init pSeries_init_mpic(void)
{
unsigned int *addrp;
struct device_node *np;
- int i;
+ unsigned long intack = 0;
/* All ISUs are setup, complete initialization */
mpic_init(pSeries_mpic);
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);
+ intack = addrp[prom_n_addr_cells(np)-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);
+ i8259_init(intack, 0);
/* Hook cascade to mpic */
- mpic_setup_cascade(NUM_ISA_INTERRUPTS, pSeries_irq_cascade, NULL);
+ mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
}
static void __init pSeries_setup_mpic(void)
/* instruct hypervisor to maintain PMCs */
if (firmware_has_feature(FW_FEATURE_SPLPAR))
- get_paca()->lppaca.pmcregs_in_use = 1;
+ get_lppaca()->pmcregs_in_use = 1;
}
static void __init pSeries_setup_arch(void)
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
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) {
+ if (get_lppaca()->shared_proc) {
printk(KERN_INFO "Using shared processor idle loop\n");
ppc_md.idle_loop = pseries_shared_idle;
} else {
ppc_md.idle_loop = default_idle;
}
- if (systemcfg->platform & PLATFORM_LPAR)
+ if (platform_is_lpar())
ppc_md.enable_pmcs = pseries_lpar_enable_pmcs;
else
ppc_md.enable_pmcs = power4_enable_pmcs;
}
of_node_put(dn);
- no_rtas:
- printk(KERN_INFO "firmware_features = 0x%lx\n",
- ppc64_firmware_features);
+no_rtas:
DBG(" <- fw_feature_init()\n");
}
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"))
+ if (strstr(typep, "open-pic")) {
ppc64_interrupt_controller = IC_OPEN_PIC;
- else if (strstr(typep, "ppc-xicp"))
+ break;
+ } else if (strstr(typep, "ppc-xicp")) {
ppc64_interrupt_controller = IC_PPC_XIC;
- else
- printk("pSeries_discover_pic: failed to recognize"
- " interrupt-controller\n");
- break;
+ break;
+ }
}
+ if (ppc64_interrupt_controller == IC_INVALID)
+ printk("pSeries_discover_pic: failed to recognize"
+ " interrupt-controller\n");
+
}
static void pSeries_mach_cpu_die(void)
for(;;);
}
+static int pseries_set_dabr(unsigned long dabr)
+{
+ return plpar_hcall_norets(H_SET_DABR, dabr);
+}
+
+static int pseries_set_xdabr(unsigned long dabr)
+{
+ /* We want to catch accesses from kernel and userspace */
+ return plpar_hcall_norets(H_SET_XDABR, dabr,
+ H_DABRX_KERNEL | H_DABRX_USER);
+}
/*
* 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)
+ if (platform_is_lpar())
hpte_init_lpar();
else {
hpte_init_native();
get_property(of_chosen, "linux,iommu-off", NULL));
}
- generic_find_legacy_serial_ports(&physport, &default_speed);
-
- if (systemcfg->platform & PLATFORM_LPAR)
+ if (platform_is_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");
- }
+ if (firmware_has_feature(FW_FEATURE_DABR))
+ ppc_md.set_dabr = pseries_set_dabr;
+ else if (firmware_has_feature(FW_FEATURE_XDABR))
+ ppc_md.set_dabr = pseries_set_xdabr;
iommu_init_early_pSeries();
static inline void dedicated_idle_sleep(unsigned int cpu)
{
- struct paca_struct *ppaca = &paca[cpu ^ 1];
+ struct lppaca *plppaca = &lppaca[cpu ^ 1];
/* Only sleep if the other thread is not idle */
- if (!(ppaca->lppaca.idle)) {
+ if (!(plppaca->idle)) {
local_irq_disable();
/*
* more.
*/
clear_thread_flag(TIF_POLLING_NRFLAG);
+ smp_mb__after_clear_bit();
/*
* SMT dynamic mode. Cede will result in this thread going
cede_processor();
else
local_irq_enable();
+ set_thread_flag(TIF_POLLING_NRFLAG);
} else {
/*
* Give the HV an opportunity at the processor, since we are
static void 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);
+ set_thread_flag(TIF_POLLING_NRFLAG);
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);
+ get_lppaca()->idle = 1;
- start_snooze = __get_tb() +
+ if (!need_resched()) {
+ start_snooze = get_tb() +
*smt_snooze_delay * tb_ticks_per_usec;
while (!need_resched() && !cpu_is_offline(cpu)) {
HMT_very_low();
if (*smt_snooze_delay != 0 &&
- __get_tb() > start_snooze) {
+ 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;
+ get_lppaca()->idle = 0;
ppc64_runlatch_on();
+ preempt_enable_no_resched();
schedule();
+ preempt_disable();
if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
cpu_die();
static void 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;
+ get_lppaca()->idle = 1;
while (!need_resched() && !cpu_is_offline(cpu)) {
local_irq_disable();
HMT_medium();
}
- lpaca->lppaca.idle = 0;
+ get_lppaca()->idle = 0;
ppc64_runlatch_on();
+ preempt_enable_no_resched();
schedule();
+ preempt_disable();
if (cpu_is_offline(cpu) && system_state == SYSTEM_RUNNING)
cpu_die();
static int pSeries_pci_probe_mode(struct pci_bus *bus)
{
- if (systemcfg->platform & PLATFORM_LPAR)
+ if (platform_is_lpar())
return PCI_PROBE_DEVTREE;
return PCI_PROBE_NORMAL;
}
+#ifdef CONFIG_KEXEC
+static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
+{
+ /* Don't risk a hypervisor call if we're crashing */
+ if (!crash_shutdown) {
+ unsigned long vpa = __pa(get_lppaca());
+
+ if (unregister_vpa(hard_smp_processor_id(), vpa)) {
+ printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
+ "failed\n", smp_processor_id(),
+ hard_smp_processor_id());
+ }
+ }
+
+ if (ppc64_interrupt_controller == IC_OPEN_PIC)
+ mpic_teardown_this_cpu(secondary);
+ else
+ xics_teardown_cpu(secondary);
+}
+#endif
+
struct machdep_calls __initdata pSeries_md = {
.probe = pSeries_probe,
.setup_arch = pSeries_setup_arch,
.check_legacy_ioport = pSeries_check_legacy_ioport,
.system_reset_exception = pSeries_system_reset_exception,
.machine_check_exception = pSeries_machine_check_exception,
+#ifdef CONFIG_KEXEC
+ .kexec_cpu_down = pseries_kexec_cpu_down,
+ .machine_kexec = default_machine_kexec,
+ .machine_kexec_prepare = default_machine_kexec_prepare,
+ .machine_crash_shutdown = default_machine_crash_shutdown,
+#endif
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff