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authorKonrad Eisele <konrad@gaisler.com>2009-08-31 22:08:13 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-02 04:19:42 -0800
commit8401707ff645521e9f21cbb8fe3b138f60e85680 (patch)
tree114287cf273b57f96d0e132cd2274c7afe60b120 /arch/sparc
parentb6727b12dd2ffb4a890eb5b13a298230c29ba45d (diff)
downloadlinux-2.6.38-lt-ux500-8401707ff645521e9f21cbb8fe3b138f60e85680.tar.gz
sparc,leon: Sparc-Leon SMP support
Support SMP for a Sparc-Leon multiprocessor system. Add Leon specific SMP code to arch/sparc/kernel/leon_smp.c. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/leon.h28
-rw-r--r--arch/sparc/include/asm/smp_32.h9
-rw-r--r--arch/sparc/kernel/Makefile2
-rw-r--r--arch/sparc/kernel/entry.S33
-rw-r--r--arch/sparc/kernel/head_32.S22
-rw-r--r--arch/sparc/kernel/ioport.c5
-rw-r--r--arch/sparc/kernel/leon_kernel.c84
-rw-r--r--arch/sparc/kernel/leon_smp.c468
-rw-r--r--arch/sparc/kernel/smp_32.c10
-rw-r--r--arch/sparc/kernel/trampoline_32.S69
-rw-r--r--arch/sparc/mm/srmmu.c5
11 files changed, 732 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h
index 28a42b73f64..559448c2c43 100644
--- a/arch/sparc/include/asm/leon.h
+++ b/arch/sparc/include/asm/leon.h
@@ -340,6 +340,30 @@ extern int leon_flush_needed(void);
extern void leon_switch_mm(void);
extern int srmmu_swprobe_trace;
+#ifdef CONFIG_SMP
+extern int leon_smp_nrcpus(void);
+extern void leon_clear_profile_irq(int cpu);
+extern void leon_smp_done(void);
+extern void leon_boot_cpus(void);
+extern int leon_boot_one_cpu(int i);
+void leon_init_smp(void);
+extern void cpu_probe(void);
+extern void cpu_idle(void);
+extern void init_IRQ(void);
+extern void cpu_panic(void);
+extern int __leon_processor_id(void);
+void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu);
+
+extern unsigned int real_irq_entry[], smpleon_ticker[];
+extern unsigned int patchme_maybe_smp_msg[];
+extern unsigned long trapbase_cpu1[];
+extern unsigned long trapbase_cpu2[];
+extern unsigned long trapbase_cpu3[];
+extern unsigned int t_nmi[], linux_trap_ipi15_leon[];
+extern unsigned int linux_trap_ipi15_sun4m[];
+
+#endif /* CONFIG_SMP */
+
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */
@@ -356,6 +380,10 @@ extern int srmmu_swprobe_trace;
#define leon_switch_mm() do {} while (0)
#define leon_init_IRQ() do {} while (0)
#define init_leon() do {} while (0)
+#define leon_smp_done() do {} while (0)
+#define leon_boot_cpus() do {} while (0)
+#define leon_boot_one_cpu(i) 1
+#define leon_init_smp() do {} while (0)
#endif /* !defined(CONFIG_SPARC_LEON) */
diff --git a/arch/sparc/include/asm/smp_32.h b/arch/sparc/include/asm/smp_32.h
index 58101dc7049..841905c1021 100644
--- a/arch/sparc/include/asm/smp_32.h
+++ b/arch/sparc/include/asm/smp_32.h
@@ -106,6 +106,15 @@ static inline int hard_smp4d_processor_id(void)
return cpuid;
}
+extern inline int hard_smpleon_processor_id(void)
+{
+ int cpuid;
+ __asm__ __volatile__("rd %%asr17,%0\n\t"
+ "srl %0,28,%0" :
+ "=&r" (cpuid) : );
+ return cpuid;
+}
+
#ifndef MODULE
static inline int hard_smp_processor_id(void)
{
diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 5b47fab9966..6b3b076173f 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -72,7 +72,7 @@ obj-y += dma.o
obj-$(CONFIG_SPARC32_PCI) += pcic.o
obj-$(CONFIG_SMP) += trampoline_$(BITS).o smp_$(BITS).o
-obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o
+obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o leon_smp.o
obj-$(CONFIG_SPARC64_SMP) += hvtramp.o
obj-y += auxio_$(BITS).o
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index f41ecc5ac0b..ec9c7bc67d2 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -400,6 +400,39 @@ linux_trap_ipi15_sun4d:
/* FIXME */
1: b,a 1b
+#ifdef CONFIG_SPARC_LEON
+
+ .globl smpleon_ticker
+ /* SMP per-cpu ticker interrupts are handled specially. */
+smpleon_ticker:
+ SAVE_ALL
+ or %l0, PSR_PIL, %g2
+ wr %g2, 0x0, %psr
+ WRITE_PAUSE
+ wr %g2, PSR_ET, %psr
+ WRITE_PAUSE
+ call leon_percpu_timer_interrupt
+ add %sp, STACKFRAME_SZ, %o0
+ wr %l0, PSR_ET, %psr
+ WRITE_PAUSE
+ RESTORE_ALL
+
+ .align 4
+ .globl linux_trap_ipi15_leon
+linux_trap_ipi15_leon:
+ SAVE_ALL
+ or %l0, PSR_PIL, %l4
+ wr %l4, 0x0, %psr
+ WRITE_PAUSE
+ wr %l4, PSR_ET, %psr
+ WRITE_PAUSE
+ call leon_cross_call_irq
+ nop
+ b ret_trap_lockless_ipi
+ clr %l6
+
+#endif /* CONFIG_SPARC_LEON */
+
#endif /* CONFIG_SMP */
/* This routine handles illegal instructions and privileged
diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S
index 439d82a95ac..21bb2590d4a 100644
--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -811,9 +811,31 @@ found_version:
got_prop:
#ifdef CONFIG_SPARC_LEON
/* no cpu-type check is needed, it is a SPARC-LEON */
+#ifdef CONFIG_SMP
+ ba leon_smp_init
+ nop
+
+ .global leon_smp_init
+leon_smp_init:
+ sethi %hi(boot_cpu_id), %g1 ! master always 0
+ stb %g0, [%g1 + %lo(boot_cpu_id)]
+ sethi %hi(boot_cpu_id4), %g1 ! master always 0
+ stb %g0, [%g1 + %lo(boot_cpu_id4)]
+
+ rd %asr17,%g1
+ srl %g1,28,%g1
+
+ cmp %g0,%g1
+ beq sun4c_continue_boot !continue with master
+ nop
+
+ ba leon_smp_cpu_startup
+ nop
+#else
ba sun4c_continue_boot
nop
#endif
+#endif
set cputypval, %o2
ldub [%o2 + 0x4], %l1
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 9f61fd8cbb7..3c8c44f6a41 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -48,8 +48,13 @@
#include <asm/dma.h>
#include <asm/iommu.h>
#include <asm/io-unit.h>
+#include <asm/leon.h>
+#ifdef CONFIG_SPARC_LEON
+#define mmu_inval_dma_area(p, l) leon_flush_dcache_all()
+#else
#define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
+#endif
static struct resource *_sparc_find_resource(struct resource *r,
unsigned long);
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index 54d8a5bd482..87f1760c0aa 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -12,11 +12,14 @@
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
+
#include <asm/oplib.h>
#include <asm/timer.h>
#include <asm/prom.h>
#include <asm/leon.h>
#include <asm/leon_amba.h>
+#include <asm/traps.h>
+#include <asm/cacheflush.h>
#include "prom.h"
#include "irq.h"
@@ -115,6 +118,21 @@ void __init leon_init_timers(irq_handler_t counter_fn)
(((1000000 / 100) - 1)));
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl, 0);
+#ifdef CONFIG_SMP
+ leon_percpu_timer_dev[0].start = (int)leon3_gptimer_regs;
+ leon_percpu_timer_dev[0].irq = leon3_gptimer_irq+1;
+
+ if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
+ (1<<LEON3_GPTIMER_SEPIRQ))) {
+ prom_printf("irq timer not configured with seperate irqs \n");
+ BUG();
+ }
+
+ LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].val, 0);
+ LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].rld, (((1000000/100) - 1)));
+ LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl, 0);
+# endif
+
} else {
printk(KERN_ERR "No Timer/irqctrl found\n");
BUG();
@@ -130,11 +148,41 @@ void __init leon_init_timers(irq_handler_t counter_fn)
prom_halt();
}
+# ifdef CONFIG_SMP
+ {
+ unsigned long flags;
+ struct tt_entry *trap_table = &sparc_ttable[SP_TRAP_IRQ1 + (leon_percpu_timer_dev[0].irq - 1)];
+
+ /* For SMP we use the level 14 ticker, however the bootup code
+ * has copied the firmwares level 14 vector into boot cpu's
+ * trap table, we must fix this now or we get squashed.
+ */
+ local_irq_save(flags);
+
+ patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
+
+ /* Adjust so that we jump directly to smpleon_ticker */
+ trap_table->inst_three += smpleon_ticker - real_irq_entry;
+
+ local_flush_cache_all();
+ local_irq_restore(flags);
+ }
+# endif
+
if (leon3_gptimer_regs) {
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[0].ctrl,
LEON3_GPTIMER_EN |
LEON3_GPTIMER_RL |
LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN);
+
+#ifdef CONFIG_SMP
+ LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[1].ctrl,
+ LEON3_GPTIMER_EN |
+ LEON3_GPTIMER_RL |
+ LEON3_GPTIMER_LD |
+ LEON3_GPTIMER_IRQEN);
+#endif
+
}
}
@@ -175,6 +223,42 @@ void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
}
}
+#ifdef CONFIG_SMP
+
+void leon_set_cpu_int(int cpu, int level)
+{
+ unsigned long mask;
+ mask = get_irqmask(level);
+ LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
+}
+
+static void leon_clear_ipi(int cpu, int level)
+{
+ unsigned long mask;
+ mask = get_irqmask(level);
+ LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
+}
+
+static void leon_set_udt(int cpu)
+{
+}
+
+void leon_clear_profile_irq(int cpu)
+{
+}
+
+void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
+{
+ unsigned long mask, flags, *addr;
+ mask = get_irqmask(irq_nr);
+ local_irq_save(flags);
+ addr = (unsigned long *)&(leon3_irqctrl_regs->mask[cpu]);
+ LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | (mask)));
+ local_irq_restore(flags);
+}
+
+#endif
+
void __init leon_init_IRQ(void)
{
sparc_init_timers = leon_init_timers;
diff --git a/arch/sparc/kernel/leon_smp.c b/arch/sparc/kernel/leon_smp.c
new file mode 100644
index 00000000000..05c0dadd637
--- /dev/null
+++ b/arch/sparc/kernel/leon_smp.c
@@ -0,0 +1,468 @@
+/* leon_smp.c: Sparc-Leon SMP support.
+ *
+ * based on sun4m_smp.c
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
+ * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
+ */
+
+#include <asm/head.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/threads.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/profile.h>
+#include <linux/pm.h>
+#include <linux/delay.h>
+
+#include <asm/cacheflush.h>
+#include <asm/tlbflush.h>
+
+#include <asm/ptrace.h>
+#include <asm/atomic.h>
+#include <asm/irq_regs.h>
+
+#include <asm/delay.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
+#include <asm/oplib.h>
+#include <asm/cpudata.h>
+#include <asm/asi.h>
+#include <asm/leon.h>
+#include <asm/leon_amba.h>
+
+#ifdef CONFIG_SPARC_LEON
+
+#include "irq.h"
+
+extern ctxd_t *srmmu_ctx_table_phys;
+static int smp_processors_ready;
+extern volatile unsigned long cpu_callin_map[NR_CPUS];
+extern unsigned char boot_cpu_id;
+extern cpumask_t smp_commenced_mask;
+void __init leon_configure_cache_smp(void);
+
+static inline unsigned long do_swap(volatile unsigned long *ptr,
+ unsigned long val)
+{
+ __asm__ __volatile__("swapa [%1] %2, %0\n\t" : "=&r"(val)
+ : "r"(ptr), "i"(ASI_LEON_DCACHE_MISS)
+ : "memory");
+ return val;
+}
+
+static void smp_setup_percpu_timer(void);
+
+void __cpuinit leon_callin(void)
+{
+ int cpuid = hard_smpleon_processor_id();
+
+ local_flush_cache_all();
+ local_flush_tlb_all();
+ leon_configure_cache_smp();
+
+ /* Get our local ticker going. */
+ smp_setup_percpu_timer();
+
+ calibrate_delay();
+ smp_store_cpu_info(cpuid);
+
+ local_flush_cache_all();
+ local_flush_tlb_all();
+
+ /*
+ * Unblock the master CPU _only_ when the scheduler state
+ * of all secondary CPUs will be up-to-date, so after
+ * the SMP initialization the master will be just allowed
+ * to call the scheduler code.
+ * Allow master to continue.
+ */
+ do_swap(&cpu_callin_map[cpuid], 1);
+
+ local_flush_cache_all();
+ local_flush_tlb_all();
+
+ cpu_probe();
+
+ /* Fix idle thread fields. */
+ __asm__ __volatile__("ld [%0], %%g6\n\t" : : "r"(&current_set[cpuid])
+ : "memory" /* paranoid */);
+
+ /* Attach to the address space of init_task. */
+ atomic_inc(&init_mm.mm_count);
+ current->active_mm = &init_mm;
+
+ while (!cpu_isset(cpuid, smp_commenced_mask))
+ mb();
+
+ local_irq_enable();
+ cpu_set(cpuid, cpu_online_map);
+}
+
+/*
+ * Cycle through the processors asking the PROM to start each one.
+ */
+
+extern struct linux_prom_registers smp_penguin_ctable;
+
+void __init leon_configure_cache_smp(void)
+{
+ unsigned long cfg = sparc_leon3_get_dcachecfg();
+ int me = smp_processor_id();
+
+ if (ASI_LEON3_SYSCTRL_CFG_SSIZE(cfg) > 4) {
+ printk(KERN_INFO "Note: SMP with snooping only works on 4k cache, found %dk(0x%x) on cpu %d, disabling caches\n",
+ (unsigned int)ASI_LEON3_SYSCTRL_CFG_SSIZE(cfg),
+ (unsigned int)cfg, (unsigned int)me);
+ sparc_leon3_disable_cache();
+ } else {
+ if (cfg & ASI_LEON3_SYSCTRL_CFG_SNOOPING) {
+ sparc_leon3_enable_snooping();
+ } else {
+ printk(KERN_INFO "Note: You have to enable snooping in the vhdl model cpu %d, disabling caches\n",
+ me);
+ sparc_leon3_disable_cache();
+ }
+ }
+
+ local_flush_cache_all();
+ local_flush_tlb_all();
+}
+
+void leon_smp_setbroadcast(unsigned int mask)
+{
+ int broadcast =
+ ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >>
+ LEON3_IRQMPSTATUS_BROADCAST) & 1);
+ if (!broadcast) {
+ prom_printf("######## !!!! The irqmp-ctrl must have broadcast enabled, smp wont work !!!!! ####### nr cpus: %d\n",
+ leon_smp_nrcpus());
+ if (leon_smp_nrcpus() > 1) {
+ BUG();
+ } else {
+ prom_printf("continue anyway\n");
+ return;
+ }
+ }
+ LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpbroadcast), mask);
+}
+
+unsigned int leon_smp_getbroadcast(void)
+{
+ unsigned int mask;
+ mask = LEON_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpbroadcast));
+ return mask;
+}
+
+int leon_smp_nrcpus(void)
+{
+ int nrcpu =
+ ((LEON3_BYPASS_LOAD_PA(&(leon3_irqctrl_regs->mpstatus)) >>
+ LEON3_IRQMPSTATUS_CPUNR) & 0xf) + 1;
+ return nrcpu;
+}
+
+void __init leon_boot_cpus(void)
+{
+ int nrcpu = leon_smp_nrcpus();
+ int me = smp_processor_id();
+
+ printk(KERN_INFO "%d:(%d:%d) cpus mpirq at 0x%x \n", (unsigned int)me,
+ (unsigned int)nrcpu, (unsigned int)NR_CPUS,
+ (unsigned int)&(leon3_irqctrl_regs->mpstatus));
+
+ leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, me);
+ leon_enable_irq_cpu(LEON3_IRQ_TICKER, me);
+ leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, me);
+
+ leon_smp_setbroadcast(1 << LEON3_IRQ_TICKER);
+
+ leon_configure_cache_smp();
+ smp_setup_percpu_timer();
+ local_flush_cache_all();
+
+}
+
+int __cpuinit leon_boot_one_cpu(int i)
+{
+
+ struct task_struct *p;
+ int timeout;
+
+ /* Cook up an idler for this guy. */
+ p = fork_idle(i);
+
+ current_set[i] = task_thread_info(p);
+
+ /* See trampoline.S:leon_smp_cpu_startup for details...
+ * Initialize the contexts table
+ * Since the call to prom_startcpu() trashes the structure,
+ * we need to re-initialize it for each cpu
+ */
+ smp_penguin_ctable.which_io = 0;
+ smp_penguin_ctable.phys_addr = (unsigned int)srmmu_ctx_table_phys;
+ smp_penguin_ctable.reg_size = 0;
+
+ /* whirrr, whirrr, whirrrrrrrrr... */
+ printk(KERN_INFO "Starting CPU %d : (irqmp: 0x%x)\n", (unsigned int)i,
+ (unsigned int)&leon3_irqctrl_regs->mpstatus);
+ local_flush_cache_all();
+
+ LEON_BYPASS_STORE_PA(&(leon3_irqctrl_regs->mpstatus), 1 << i);
+
+ /* wheee... it's going... */
+ for (timeout = 0; timeout < 10000; timeout++) {
+ if (cpu_callin_map[i])
+ break;
+ udelay(200);
+ }
+ printk(KERN_INFO "Started CPU %d \n", (unsigned int)i);
+
+ if (!(cpu_callin_map[i])) {
+ printk(KERN_ERR "Processor %d is stuck.\n", i);
+ return -ENODEV;
+ } else {
+ leon_enable_irq_cpu(LEON3_IRQ_CROSS_CALL, i);
+ leon_enable_irq_cpu(LEON3_IRQ_TICKER, i);
+ leon_enable_irq_cpu(LEON3_IRQ_RESCHEDULE, i);
+ }
+
+ local_flush_cache_all();
+ return 0;
+}
+
+void __init leon_smp_done(void)
+{
+
+ int i, first;
+ int *prev;
+
+ /* setup cpu list for irq rotation */
+ first = 0;
+ prev = &first;
+ for (i = 0; i < NR_CPUS; i++) {
+ if (cpu_online(i)) {
+ *prev = i;
+ prev = &cpu_data(i).next;
+ }
+ }
+ *prev = first;
+ local_flush_cache_all();
+
+ /* Free unneeded trap tables */
+ if (!cpu_isset(1, cpu_present_map)) {
+ ClearPageReserved(virt_to_page(trapbase_cpu1));
+ init_page_count(virt_to_page(trapbase_cpu1));
+ free_page((unsigned long)trapbase_cpu1);
+ totalram_pages++;
+ num_physpages++;
+ }
+ if (!cpu_isset(2, cpu_present_map)) {
+ ClearPageReserved(virt_to_page(trapbase_cpu2));
+ init_page_count(virt_to_page(trapbase_cpu2));
+ free_page((unsigned long)trapbase_cpu2);
+ totalram_pages++;
+ num_physpages++;
+ }
+ if (!cpu_isset(3, cpu_present_map)) {
+ ClearPageReserved(virt_to_page(trapbase_cpu3));
+ init_page_count(virt_to_page(trapbase_cpu3));
+ free_page((unsigned long)trapbase_cpu3);
+ totalram_pages++;
+ num_physpages++;
+ }
+ /* Ok, they are spinning and ready to go. */
+ smp_processors_ready = 1;
+
+}
+
+void leon_irq_rotate(int cpu)
+{
+}
+
+static struct smp_funcall {
+ smpfunc_t func;
+ unsigned long arg1;
+ unsigned long arg2;
+ unsigned long arg3;
+ unsigned long arg4;
+ unsigned long arg5;
+ unsigned long processors_in[NR_CPUS]; /* Set when ipi entered. */
+ unsigned long processors_out[NR_CPUS]; /* Set when ipi exited. */
+} ccall_info;
+
+static DEFINE_SPINLOCK(cross_call_lock);
+
+/* Cross calls must be serialized, at least currently. */
+static void leon_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
+ unsigned long arg2, unsigned long arg3,
+ unsigned long arg4)
+{
+ if (smp_processors_ready) {
+ register int high = NR_CPUS - 1;
+ unsigned long flags;
+
+ spin_lock_irqsave(&cross_call_lock, flags);
+
+ {
+ /* If you make changes here, make sure gcc generates proper code... */
+ register smpfunc_t f asm("i0") = func;
+ register unsigned long a1 asm("i1") = arg1;
+ register unsigned long a2 asm("i2") = arg2;
+ register unsigned long a3 asm("i3") = arg3;
+ register unsigned long a4 asm("i4") = arg4;
+ register unsigned long a5 asm("i5") = 0;
+
+ __asm__ __volatile__("std %0, [%6]\n\t"
+ "std %2, [%6 + 8]\n\t"
+ "std %4, [%6 + 16]\n\t" : :
+ "r"(f), "r"(a1), "r"(a2), "r"(a3),
+ "r"(a4), "r"(a5),
+ "r"(&ccall_info.func));
+ }
+
+ /* Init receive/complete mapping, plus fire the IPI's off. */
+ {
+ register int i;
+
+ cpu_clear(smp_processor_id(), mask);
+ cpus_and(mask, cpu_online_map, mask);
+ for (i = 0; i <= high; i++) {
+ if (cpu_isset(i, mask)) {
+ ccall_info.processors_in[i] = 0;
+ ccall_info.processors_out[i] = 0;
+ set_cpu_int(i, LEON3_IRQ_CROSS_CALL);
+
+ }
+ }
+ }
+
+ {
+ register int i;
+
+ i = 0;
+ do {
+ if (!cpu_isset(i, mask))
+ continue;
+
+ while (!ccall_info.processors_in[i])
+ barrier();
+ } while (++i <= high);
+
+ i = 0;
+ do {
+ if (!cpu_isset(i, mask))
+ continue;
+
+ while (!ccall_info.processors_out[i])
+ barrier();
+ } while (++i <= high);
+ }
+
+ spin_unlock_irqrestore(&cross_call_lock, flags);
+ }
+}
+
+/* Running cross calls. */
+void leon_cross_call_irq(void)
+{
+ int i = smp_processor_id();
+
+ ccall_info.processors_in[i] = 1;
+ ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3,
+ ccall_info.arg4, ccall_info.arg5);
+ ccall_info.processors_out[i] = 1;
+}
+
+void leon_percpu_timer_interrupt(struct pt_regs *regs)
+{
+ struct pt_regs *old_regs;
+ int cpu = smp_processor_id();
+
+ old_regs = set_irq_regs(regs);
+
+ leon_clear_profile_irq(cpu);
+
+ profile_tick(CPU_PROFILING);
+
+ if (!--prof_counter(cpu)) {
+ int user = user_mode(regs);
+
+ irq_enter();
+ update_process_times(user);
+ irq_exit();
+
+ prof_counter(cpu) = prof_multiplier(cpu);
+ }
+ set_irq_regs(old_regs);
+}
+
+static void __init smp_setup_percpu_timer(void)
+{
+ int cpu = smp_processor_id();
+
+ prof_counter(cpu) = prof_multiplier(cpu) = 1;
+}
+
+void __init leon_blackbox_id(unsigned *addr)
+{
+ int rd = *addr & 0x3e000000;
+ int rs1 = rd >> 11;
+
+ /* patch places where ___b_hard_smp_processor_id appears */
+ addr[0] = 0x81444000 | rd; /* rd %asr17, reg */
+ addr[1] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */
+ addr[2] = 0x01000000; /* nop */
+}
+
+void __init leon_blackbox_current(unsigned *addr)
+{
+ int rd = *addr & 0x3e000000;
+ int rs1 = rd >> 11;
+
+ /* patch LOAD_CURRENT macro where ___b_load_current appears */
+ addr[0] = 0x81444000 | rd; /* rd %asr17, reg */
+ addr[2] = 0x8130201c | rd | rs1; /* srl reg, 0x1c, reg */
+ addr[4] = 0x81282002 | rd | rs1; /* sll reg, 0x2, reg */
+
+}
+
+/*
+ * CPU idle callback function
+ * See .../arch/sparc/kernel/process.c
+ */
+void pmc_leon_idle(void)
+{
+ __asm__ volatile ("mov %g0, %asr19");
+}
+
+void __init leon_init_smp(void)
+{
+ /* Patch ipi15 trap table */
+ t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_leon - linux_trap_ipi15_sun4m);
+
+ BTFIXUPSET_BLACKBOX(hard_smp_processor_id, leon_blackbox_id);
+ BTFIXUPSET_BLACKBOX(load_current, leon_blackbox_current);
+ BTFIXUPSET_CALL(smp_cross_call, leon_cross_call, BTFIXUPCALL_NORM);
+ BTFIXUPSET_CALL(__hard_smp_processor_id, __leon_processor_id,
+ BTFIXUPCALL_NORM);
+
+#ifndef PMC_NO_IDLE
+ /* Assign power management IDLE handler */
+ pm_idle = pmc_leon_idle;
+ printk(KERN_INFO "leon: power management initialized\n");
+#endif
+
+}
+
+#endif /* CONFIG_SPARC_LEON */
diff --git a/arch/sparc/kernel/smp_32.c b/arch/sparc/kernel/smp_32.c
index 132d81fb261..91c10fb7085 100644
--- a/arch/sparc/kernel/smp_32.c
+++ b/arch/sparc/kernel/smp_32.c
@@ -32,6 +32,7 @@
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
#include <asm/cpudata.h>
+#include <asm/leon.h>
#include "irq.h"
@@ -96,6 +97,9 @@ void __init smp_cpus_done(unsigned int max_cpus)
case sun4d:
smp4d_smp_done();
break;
+ case sparc_leon:
+ leon_smp_done();
+ break;
case sun4e:
printk("SUN4E\n");
BUG();
@@ -306,6 +310,9 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
case sun4d:
smp4d_boot_cpus();
break;
+ case sparc_leon:
+ leon_boot_cpus();
+ break;
case sun4e:
printk("SUN4E\n");
BUG();
@@ -376,6 +383,9 @@ int __cpuinit __cpu_up(unsigned int cpu)
case sun4d:
ret = smp4d_boot_one_cpu(cpu);
break;
+ case sparc_leon:
+ ret = leon_boot_one_cpu(cpu);
+ break;
case sun4e:
printk("SUN4E\n");
BUG();
diff --git a/arch/sparc/kernel/trampoline_32.S b/arch/sparc/kernel/trampoline_32.S
index 5e235c52d66..691f484e03b 100644
--- a/arch/sparc/kernel/trampoline_32.S
+++ b/arch/sparc/kernel/trampoline_32.S
@@ -15,7 +15,7 @@
#include <asm/contregs.h>
#include <asm/thread_info.h>
- .globl sun4m_cpu_startup, __smp4m_processor_id
+ .globl sun4m_cpu_startup, __smp4m_processor_id, __leon_processor_id
.globl sun4d_cpu_startup, __smp4d_processor_id
__CPUINIT
@@ -106,6 +106,12 @@ __smp4d_processor_id:
retl
mov %g1, %o7
+__leon_processor_id:
+ rd %asr17,%g2
+ srl %g2,28,%g2
+ retl
+ mov %g1, %o7
+
/* CPUID in bootbus can be found at PA 0xff0140000 */
#define SUN4D_BOOTBUS_CPUID 0xf0140000
@@ -160,3 +166,64 @@ sun4d_cpu_startup:
nop
b,a smp_do_cpu_idle
+
+#ifdef CONFIG_SPARC_LEON
+
+ __CPUINIT
+ .align 4
+ .global leon_smp_cpu_startup, smp_penguin_ctable
+
+leon_smp_cpu_startup:
+
+ set smp_penguin_ctable,%g1
+ ld [%g1+4],%g1
+ srl %g1,4,%g1
+ set 0x00000100,%g5 /* SRMMU_CTXTBL_PTR */
+ sta %g1, [%g5] ASI_M_MMUREGS
+
+ /* Set up a sane %psr -- PIL<0xf> S<0x1> PS<0x1> CWP<0x0> */
+ set (PSR_PIL | PSR_S | PSR_PS), %g1
+ wr %g1, 0x0, %psr ! traps off though
+ WRITE_PAUSE
+
+ /* Our %wim is one behind CWP */
+ mov 2, %g1
+ wr %g1, 0x0, %wim
+ WRITE_PAUSE
+
+ /* Set tbr - we use just one trap table. */
+ set trapbase, %g1
+ wr %g1, 0x0, %tbr
+ WRITE_PAUSE
+
+ /* Get our CPU id */
+ rd %asr17,%g3
+
+ /* Give ourselves a stack and curptr. */
+ set current_set, %g5
+ srl %g3, 28, %g4
+ sll %g4, 2, %g4
+ ld [%g5 + %g4], %g6
+
+ sethi %hi(THREAD_SIZE - STACKFRAME_SZ), %sp
+ or %sp, %lo(THREAD_SIZE - STACKFRAME_SZ), %sp
+ add %g6, %sp, %sp
+
+ /* Turn on traps (PSR_ET). */
+ rd %psr, %g1
+ wr %g1, PSR_ET, %psr ! traps on
+ WRITE_PAUSE
+
+ /* Init our caches, etc. */
+ set poke_srmmu, %g5
+ ld [%g5], %g5
+ call %g5
+ nop
+
+ /* Start this processor. */
+ call leon_callin
+ nop
+
+ b,a smp_do_cpu_idle
+
+#endif
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index 509b1ffeba6..d55c2553b68 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -2301,7 +2301,8 @@ void __init ld_mmu_srmmu(void)
BTFIXUPSET_CALL(flush_cache_mm, smp_flush_cache_mm, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(flush_cache_range, smp_flush_cache_range, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(flush_cache_page, smp_flush_cache_page, BTFIXUPCALL_NORM);
- if (sparc_cpu_model != sun4d) {
+ if (sparc_cpu_model != sun4d &&
+ sparc_cpu_model != sparc_leon) {
BTFIXUPSET_CALL(flush_tlb_all, smp_flush_tlb_all, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(flush_tlb_mm, smp_flush_tlb_mm, BTFIXUPCALL_NORM);
BTFIXUPSET_CALL(flush_tlb_range, smp_flush_tlb_range, BTFIXUPCALL_NORM);
@@ -2330,6 +2331,8 @@ void __init ld_mmu_srmmu(void)
#ifdef CONFIG_SMP
if (sparc_cpu_model == sun4d)
sun4d_init_smp();
+ else if (sparc_cpu_model == sparc_leon)
+ leon_init_smp();
else
sun4m_init_smp();
#endif