diff options
| -rw-r--r-- | arch/sparc/include/asm/leon.h | 28 | ||||
| -rw-r--r-- | arch/sparc/include/asm/smp_32.h | 9 | ||||
| -rw-r--r-- | arch/sparc/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/sparc/kernel/entry.S | 33 | ||||
| -rw-r--r-- | arch/sparc/kernel/head_32.S | 22 | ||||
| -rw-r--r-- | arch/sparc/kernel/ioport.c | 5 | ||||
| -rw-r--r-- | arch/sparc/kernel/leon_kernel.c | 84 | ||||
| -rw-r--r-- | arch/sparc/kernel/leon_smp.c | 468 | ||||
| -rw-r--r-- | arch/sparc/kernel/smp_32.c | 10 | ||||
| -rw-r--r-- | arch/sparc/kernel/trampoline_32.S | 69 | ||||
| -rw-r--r-- | arch/sparc/mm/srmmu.c | 5 |
11 files changed, 732 insertions, 3 deletions
diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h index 28a42b7..559448c 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 58101dc..841905c 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 5b47fab..6b3b076 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 f41ecc5..ec9c7bc 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 439d82a..21bb259 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 9f61fd8..3c8c44f 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 54d8a5b..87f1760 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 0000000..05c0dad --- /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"(¤t_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 132d81f..91c10fb 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 5e235c5..691f484 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 509b1ff..d55c255 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 |
