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-rw-r--r--arch/metag/kernel/cachepart.c29
-rw-r--r--arch/metag/kernel/clock.c59
-rw-r--r--arch/metag/kernel/da.c2
-rw-r--r--arch/metag/kernel/devtree.c83
-rw-r--r--arch/metag/kernel/dma.c9
-rw-r--r--arch/metag/kernel/ftrace.c5
-rw-r--r--arch/metag/kernel/head.S8
-rw-r--r--arch/metag/kernel/irq.c75
-rw-r--r--arch/metag/kernel/kick.c9
-rw-r--r--arch/metag/kernel/metag_ksyms.c5
-rw-r--r--arch/metag/kernel/perf/perf_event.c82
-rw-r--r--arch/metag/kernel/process.c37
-rw-r--r--arch/metag/kernel/ptrace.c34
-rw-r--r--arch/metag/kernel/setup.c34
-rw-r--r--arch/metag/kernel/signal.c48
-rw-r--r--arch/metag/kernel/smp.c175
-rw-r--r--arch/metag/kernel/time.c14
-rw-r--r--arch/metag/kernel/topology.c1
-rw-r--r--arch/metag/kernel/traps.c18
19 files changed, 429 insertions, 298 deletions
diff --git a/arch/metag/kernel/cachepart.c b/arch/metag/kernel/cachepart.c
index 3a589dfb966..0a2385fa2a1 100644
--- a/arch/metag/kernel/cachepart.c
+++ b/arch/metag/kernel/cachepart.c
@@ -24,15 +24,21 @@
unsigned int get_dcache_size(void)
{
unsigned int config2 = metag_in32(METAC_CORE_CONFIG2);
- return 0x1000 << ((config2 & METAC_CORECFG2_DCSZ_BITS)
- >> METAC_CORECFG2_DCSZ_S);
+ unsigned int sz = 0x1000 << ((config2 & METAC_CORECFG2_DCSZ_BITS)
+ >> METAC_CORECFG2_DCSZ_S);
+ if (config2 & METAC_CORECFG2_DCSMALL_BIT)
+ sz >>= 6;
+ return sz;
}
unsigned int get_icache_size(void)
{
unsigned int config2 = metag_in32(METAC_CORE_CONFIG2);
- return 0x1000 << ((config2 & METAC_CORE_C2ICSZ_BITS)
- >> METAC_CORE_C2ICSZ_S);
+ unsigned int sz = 0x1000 << ((config2 & METAC_CORE_C2ICSZ_BITS)
+ >> METAC_CORE_C2ICSZ_S);
+ if (config2 & METAC_CORECFG2_ICSMALL_BIT)
+ sz >>= 6;
+ return sz;
}
unsigned int get_global_dcache_size(void)
@@ -61,7 +67,7 @@ static unsigned int get_thread_cache_size(unsigned int cache, int thread_id)
return 0;
#if PAGE_OFFSET >= LINGLOBAL_BASE
/* Checking for global cache */
- cache_size = (cache == DCACHE ? get_global_dache_size() :
+ cache_size = (cache == DCACHE ? get_global_dcache_size() :
get_global_icache_size());
offset = 8;
#else
@@ -94,22 +100,23 @@ void check_for_cache_aliasing(int thread_id)
thread_cache_size =
get_thread_cache_size(cache_type, thread_id);
if (thread_cache_size < 0)
- pr_emerg("Can't read %s cache size", \
+ pr_emerg("Can't read %s cache size\n",
cache_type ? "DCACHE" : "ICACHE");
else if (thread_cache_size == 0)
/* Cache is off. No need to check for aliasing */
continue;
if (thread_cache_size / CACHE_ASSOCIATIVITY > PAGE_SIZE) {
- pr_emerg("Cache aliasing detected in %s on Thread %d",
+ pr_emerg("Potential cache aliasing detected in %s on Thread %d\n",
cache_type ? "DCACHE" : "ICACHE", thread_id);
- pr_warn("Total %s size: %u bytes",
- cache_type ? "DCACHE" : "ICACHE ",
+ pr_warn("Total %s size: %u bytes\n",
+ cache_type ? "DCACHE" : "ICACHE",
cache_type ? get_dcache_size()
: get_icache_size());
- pr_warn("Thread %s size: %d bytes",
+ pr_warn("Thread %s size: %d bytes\n",
cache_type ? "CACHE" : "ICACHE",
thread_cache_size);
- pr_warn("Page Size: %lu bytes", PAGE_SIZE);
+ pr_warn("Page Size: %lu bytes\n", PAGE_SIZE);
+ panic("Potential cache aliasing detected");
}
}
}
diff --git a/arch/metag/kernel/clock.c b/arch/metag/kernel/clock.c
index defc84056f1..6339c9c6d0a 100644
--- a/arch/metag/kernel/clock.c
+++ b/arch/metag/kernel/clock.c
@@ -8,8 +8,10 @@
* published by the Free Software Foundation.
*/
+#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <asm/param.h>
#include <asm/clock.h>
@@ -34,8 +36,63 @@ static unsigned long get_core_freq_default(void)
#endif
}
+static struct clk *clk_core;
+
+/* Clk based get_core_freq callback. */
+static unsigned long get_core_freq_clk(void)
+{
+ return clk_get_rate(clk_core);
+}
+
+/**
+ * init_metag_core_clock() - Set up core clock from devicetree.
+ *
+ * Checks to see if a "core" clock is provided in the device tree, and overrides
+ * the get_core_freq callback to use it.
+ */
+static void __init init_metag_core_clock(void)
+{
+ /*
+ * See if a core clock is provided by the devicetree (and
+ * registered by the init callback above).
+ */
+ struct device_node *node;
+ node = of_find_compatible_node(NULL, NULL, "img,meta");
+ if (!node) {
+ pr_warn("%s: no compatible img,meta DT node found\n",
+ __func__);
+ return;
+ }
+
+ clk_core = of_clk_get_by_name(node, "core");
+ if (IS_ERR(clk_core)) {
+ pr_warn("%s: no core clock found in DT\n",
+ __func__);
+ return;
+ }
+
+ /*
+ * Override the core frequency callback to use
+ * this clk.
+ */
+ _meta_clock.get_core_freq = get_core_freq_clk;
+}
+
+/**
+ * init_metag_clocks() - Set up clocks from devicetree.
+ *
+ * Set up important clocks from device tree. In particular any needed for clock
+ * sources.
+ */
+void __init init_metag_clocks(void)
+{
+ init_metag_core_clock();
+
+ pr_info("Core clock frequency: %lu Hz\n", get_coreclock());
+}
+
/**
- * setup_meta_clocks() - Set up the Meta clock.
+ * setup_meta_clocks() - Early set up of the Meta clock.
* @desc: Clock descriptor usually provided by machine description
*
* Ensures all callbacks are valid.
diff --git a/arch/metag/kernel/da.c b/arch/metag/kernel/da.c
index 52aabb658fd..a35dbed6fff 100644
--- a/arch/metag/kernel/da.c
+++ b/arch/metag/kernel/da.c
@@ -5,12 +5,14 @@
*/
+#include <linux/export.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <asm/da.h>
#include <asm/metag_mem.h>
bool _metag_da_present;
+EXPORT_SYMBOL_GPL(_metag_da_present);
int __init metag_da_probe(void)
{
diff --git a/arch/metag/kernel/devtree.c b/arch/metag/kernel/devtree.c
index 7cd02529636..18dd7aea9fd 100644
--- a/arch/metag/kernel/devtree.c
+++ b/arch/metag/kernel/devtree.c
@@ -34,6 +34,19 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
return alloc_bootmem_align(size, align);
}
+static const void * __init arch_get_next_mach(const char *const **match)
+{
+ static const struct machine_desc *mdesc = __arch_info_begin;
+ const struct machine_desc *m = mdesc;
+
+ if (m >= __arch_info_end)
+ return NULL;
+
+ mdesc++;
+ *match = m->dt_compat;
+ return m;
+}
+
/**
* setup_machine_fdt - Machine setup when an dtb was passed to the kernel
* @dt: virtual address pointer to dt blob
@@ -41,74 +54,18 @@ void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
* If a dtb was passed to the kernel, then use it to choose the correct
* machine_desc and to setup the system.
*/
-struct machine_desc * __init setup_machine_fdt(void *dt)
+const struct machine_desc * __init setup_machine_fdt(void *dt)
{
- struct boot_param_header *devtree = dt;
- struct machine_desc *mdesc, *mdesc_best = NULL;
- unsigned int score, mdesc_score = ~1;
- unsigned long dt_root;
- const char *model;
+ const struct machine_desc *mdesc;
/* check device tree validity */
- if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
+ if (!early_init_dt_scan(dt))
return NULL;
- /* Search the mdescs for the 'best' compatible value match */
- initial_boot_params = devtree;
- dt_root = of_get_flat_dt_root();
-
- for_each_machine_desc(mdesc) {
- score = of_flat_dt_match(dt_root, mdesc->dt_compat);
- if (score > 0 && score < mdesc_score) {
- mdesc_best = mdesc;
- mdesc_score = score;
- }
- }
- if (!mdesc_best) {
- const char *prop;
- long size;
-
- pr_err("\nError: unrecognized/unsupported device tree compatible list:\n[ ");
-
- prop = of_get_flat_dt_prop(dt_root, "compatible", &size);
- if (prop) {
- while (size > 0) {
- printk("'%s' ", prop);
- size -= strlen(prop) + 1;
- prop += strlen(prop) + 1;
- }
- }
- printk("]\n\n");
-
+ mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach);
+ if (!mdesc)
dump_machine_table(); /* does not return */
- }
-
- model = of_get_flat_dt_prop(dt_root, "model", NULL);
- if (!model)
- model = of_get_flat_dt_prop(dt_root, "compatible", NULL);
- if (!model)
- model = "<unknown>";
- pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
-
- /* Retrieve various information from the /chosen node */
- of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
-
- return mdesc_best;
-}
+ pr_info("Machine name: %s\n", mdesc->name);
-/**
- * copy_fdt - Copy device tree into non-init memory.
- *
- * We must copy the flattened device tree blob into non-init memory because the
- * unflattened device tree will reference the strings in it directly.
- */
-void __init copy_fdt(void)
-{
- void *alloc = early_init_dt_alloc_memory_arch(
- be32_to_cpu(initial_boot_params->totalsize), 0x40);
- if (alloc) {
- memcpy(alloc, initial_boot_params,
- be32_to_cpu(initial_boot_params->totalsize));
- initial_boot_params = alloc;
- }
+ return mdesc;
}
diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c
index 8c00dedadc5..c700d625067 100644
--- a/arch/metag/kernel/dma.c
+++ b/arch/metag/kernel/dma.c
@@ -305,9 +305,7 @@ void dma_free_coherent(struct device *dev, size_t size,
if (pfn_valid(pfn)) {
struct page *page = pfn_to_page(pfn);
- ClearPageReserved(page);
-
- __free_page(page);
+ __free_reserved_page(page);
continue;
}
}
@@ -401,11 +399,6 @@ static int __init dma_alloc_init(void)
pgd = pgd_offset(&init_mm, CONSISTENT_START);
pud = pud_alloc(&init_mm, pgd, CONSISTENT_START);
pmd = pmd_alloc(&init_mm, pud, CONSISTENT_START);
- if (!pmd) {
- pr_err("%s: no pmd tables\n", __func__);
- ret = -ENOMEM;
- break;
- }
WARN_ON(!pmd_none(*pmd));
pte = pte_alloc_kernel(pmd, CONSISTENT_START);
diff --git a/arch/metag/kernel/ftrace.c b/arch/metag/kernel/ftrace.c
index a774f321643..ed1d685157c 100644
--- a/arch/metag/kernel/ftrace.c
+++ b/arch/metag/kernel/ftrace.c
@@ -117,10 +117,7 @@ int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
}
/* run from kstop_machine */
-int __init ftrace_dyn_arch_init(void *data)
+int __init ftrace_dyn_arch_init(void)
{
- /* The return code is returned via data */
- writel(0, data);
-
return 0;
}
diff --git a/arch/metag/kernel/head.S b/arch/metag/kernel/head.S
index 969dffabc03..713f71d1bdf 100644
--- a/arch/metag/kernel/head.S
+++ b/arch/metag/kernel/head.S
@@ -1,6 +1,7 @@
! Copyright 2005,2006,2007,2009 Imagination Technologies
#include <linux/init.h>
+#include <asm/metag_mem.h>
#include <generated/asm-offsets.h>
#undef __exit
@@ -48,6 +49,13 @@ __exit:
.global _secondary_startup
.type _secondary_startup,function
_secondary_startup:
+#if CONFIG_PAGE_OFFSET < LINGLOBAL_BASE
+ ! In case GCOn has just been turned on we need to fence any writes that
+ ! the boot thread might have performed prior to coherency taking effect.
+ MOVT D0Re0,#HI(LINSYSEVENT_WR_ATOMIC_UNLOCK)
+ MOV D1Re0,#0
+ SETD [D0Re0], D1Re0
+#endif
MOVT A0StP,#HI(_secondary_data_stack)
ADD A0StP,A0StP,#LO(_secondary_data_stack)
GETD A0StP,[A0StP]
diff --git a/arch/metag/kernel/irq.c b/arch/metag/kernel/irq.c
index 87707efeb0a..5385dd1216b 100644
--- a/arch/metag/kernel/irq.c
+++ b/arch/metag/kernel/irq.c
@@ -25,7 +25,7 @@ static union irq_ctx *hardirq_ctx[NR_CPUS] __read_mostly;
static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
#endif
-struct irq_domain *root_domain;
+static struct irq_domain *root_domain;
static unsigned int startup_meta_irq(struct irq_data *data)
{
@@ -159,44 +159,30 @@ void irq_ctx_exit(int cpu)
extern asmlinkage void __do_softirq(void);
-asmlinkage void do_softirq(void)
+void do_softirq_own_stack(void)
{
- unsigned long flags;
struct thread_info *curctx;
union irq_ctx *irqctx;
u32 *isp;
- if (in_interrupt())
- return;
-
- local_irq_save(flags);
-
- if (local_softirq_pending()) {
- curctx = current_thread_info();
- irqctx = softirq_ctx[smp_processor_id()];
- irqctx->tinfo.task = curctx->task;
-
- /* build the stack frame on the softirq stack */
- isp = (u32 *) ((char *)irqctx + sizeof(struct thread_info));
-
- asm volatile (
- "MOV D0.5,%0\n"
- "SWAP A0StP,D0.5\n"
- "CALLR D1RtP,___do_softirq\n"
- "MOV A0StP,D0.5\n"
- :
- : "r" (isp)
- : "memory", "cc", "D1Ar1", "D0Ar2", "D1Ar3", "D0Ar4",
- "D1Ar5", "D0Ar6", "D0Re0", "D1Re0", "D0.4", "D1RtP",
- "D0.5"
- );
- /*
- * Shouldn't happen, we returned above if in_interrupt():
- */
- WARN_ON_ONCE(softirq_count());
- }
-
- local_irq_restore(flags);
+ curctx = current_thread_info();
+ irqctx = softirq_ctx[smp_processor_id()];
+ irqctx->tinfo.task = curctx->task;
+
+ /* build the stack frame on the softirq stack */
+ isp = (u32 *) ((char *)irqctx + sizeof(struct thread_info));
+
+ asm volatile (
+ "MOV D0.5,%0\n"
+ "SWAP A0StP,D0.5\n"
+ "CALLR D1RtP,___do_softirq\n"
+ "MOV A0StP,D0.5\n"
+ :
+ : "r" (isp)
+ : "memory", "cc", "D1Ar1", "D0Ar2", "D1Ar3", "D0Ar4",
+ "D1Ar5", "D0Ar6", "D0Re0", "D1Re0", "D0.4", "D1RtP",
+ "D0.5"
+ );
}
#endif
@@ -275,17 +261,6 @@ int __init arch_probe_nr_irqs(void)
}
#ifdef CONFIG_HOTPLUG_CPU
-static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
-{
- struct irq_desc *desc = irq_to_desc(irq);
- struct irq_chip *chip = irq_data_get_irq_chip(data);
-
- raw_spin_lock_irq(&desc->lock);
- if (chip->irq_set_affinity)
- chip->irq_set_affinity(data, cpumask_of(cpu), false);
- raw_spin_unlock_irq(&desc->lock);
-}
-
/*
* The CPU has been marked offline. Migrate IRQs off this CPU. If
* the affinity settings do not allow other CPUs, force them onto any
@@ -294,10 +269,9 @@ static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
void migrate_irqs(void)
{
unsigned int i, cpu = smp_processor_id();
- struct irq_desc *desc;
- for_each_irq_desc(i, desc) {
- struct irq_data *data = irq_desc_get_irq_data(desc);
+ for_each_active_irq(i) {
+ struct irq_data *data = irq_get_irq_data(i);
unsigned int newcpu;
if (irqd_is_per_cpu(data))
@@ -313,11 +287,8 @@ void migrate_irqs(void)
i, cpu);
cpumask_setall(data->affinity);
- newcpu = cpumask_any_and(data->affinity,
- cpu_online_mask);
}
-
- route_irq(data, i, newcpu);
+ irq_set_affinity(i, data->affinity);
}
}
#endif /* CONFIG_HOTPLUG_CPU */
diff --git a/arch/metag/kernel/kick.c b/arch/metag/kernel/kick.c
index 50fcbec98cd..beb37762132 100644
--- a/arch/metag/kernel/kick.c
+++ b/arch/metag/kernel/kick.c
@@ -26,6 +26,8 @@
* pass it as an argument.
*/
#include <linux/export.h>
+#include <linux/hardirq.h>
+#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/types.h>
@@ -66,6 +68,7 @@ EXPORT_SYMBOL(kick_unregister_func);
TBIRES
kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI)
{
+ struct pt_regs *old_regs;
struct kick_irq_handler *kh;
struct list_head *lh;
int handled = 0;
@@ -79,6 +82,9 @@ kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI)
trace_hardirqs_off();
+ old_regs = set_irq_regs((struct pt_regs *)State.Sig.pCtx);
+ irq_enter();
+
/*
* There is no need to disable interrupts here because we
* can't nest KICK interrupts in a KICK interrupt handler.
@@ -97,5 +103,8 @@ kick_handler(TBIRES State, int SigNum, int Triggers, int Inst, PTBI pTBI)
WARN_ON(!handled);
+ irq_exit();
+ set_irq_regs(old_regs);
+
return tail_end(ret);
}
diff --git a/arch/metag/kernel/metag_ksyms.c b/arch/metag/kernel/metag_ksyms.c
index ec872ef14eb..215c94ad63a 100644
--- a/arch/metag/kernel/metag_ksyms.c
+++ b/arch/metag/kernel/metag_ksyms.c
@@ -1,5 +1,7 @@
#include <linux/export.h>
+#include <linux/types.h>
+#include <asm/checksum.h>
#include <asm/div64.h>
#include <asm/ftrace.h>
#include <asm/page.h>
@@ -15,6 +17,9 @@ EXPORT_SYMBOL(max_pfn);
EXPORT_SYMBOL(min_low_pfn);
#endif
+/* Network checksum functions */
+EXPORT_SYMBOL(csum_partial);
+
/* TBI symbols */
EXPORT_SYMBOL(__TBI);
EXPORT_SYMBOL(__TBIFindSeg);
diff --git a/arch/metag/kernel/perf/perf_event.c b/arch/metag/kernel/perf/perf_event.c
index a876d5ff389..5cc4d4dcf3c 100644
--- a/arch/metag/kernel/perf/perf_event.c
+++ b/arch/metag/kernel/perf/perf_event.c
@@ -22,9 +22,9 @@
#include <linux/slab.h>
#include <asm/core_reg.h>
-#include <asm/hwthread.h>
#include <asm/io.h>
#include <asm/irq.h>
+#include <asm/processor.h>
#include "perf_event.h"
@@ -40,10 +40,10 @@ static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events);
/* PMU admin */
const char *perf_pmu_name(void)
{
- if (metag_pmu)
- return metag_pmu->pmu.name;
+ if (!metag_pmu)
+ return NULL;
- return NULL;
+ return metag_pmu->name;
}
EXPORT_SYMBOL_GPL(perf_pmu_name);
@@ -171,6 +171,7 @@ static int metag_pmu_event_init(struct perf_event *event)
switch (event->attr.type) {
case PERF_TYPE_HARDWARE:
case PERF_TYPE_HW_CACHE:
+ case PERF_TYPE_RAW:
err = _hw_perf_event_init(event);
break;
@@ -211,9 +212,10 @@ again:
/*
* Calculate the delta and add it to the counter.
*/
- delta = new_raw_count - prev_raw_count;
+ delta = (new_raw_count - prev_raw_count) & MAX_PERIOD;
local64_add(delta, &event->count);
+ local64_sub(delta, &hwc->period_left);
}
int metag_pmu_event_set_period(struct perf_event *event,
@@ -223,6 +225,10 @@ int metag_pmu_event_set_period(struct perf_event *event,
s64 period = hwc->sample_period;
int ret = 0;
+ /* The period may have been changed */
+ if (unlikely(period != hwc->last_period))
+ left += period - hwc->last_period;
+
if (unlikely(left <= -period)) {
left = period;
local64_set(&hwc->period_left, left);
@@ -240,8 +246,10 @@ int metag_pmu_event_set_period(struct perf_event *event,
if (left > (s64)metag_pmu->max_period)
left = metag_pmu->max_period;
- if (metag_pmu->write)
- metag_pmu->write(idx, (u64)(-left) & MAX_PERIOD);
+ if (metag_pmu->write) {
+ local64_set(&hwc->prev_count, -(s32)left);
+ metag_pmu->write(idx, -left & MAX_PERIOD);
+ }
perf_event_update_userpage(event);
@@ -549,6 +557,10 @@ static int _hw_perf_event_init(struct perf_event *event)
if (err)
return err;
break;
+
+ case PERF_TYPE_RAW:
+ mapping = attr->config;
+ break;
}
/* Return early if the event is unsupported */
@@ -610,15 +622,13 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx)
WARN_ONCE((config != 0x100),
"invalid configuration (%d) for counter (%d)\n",
config, idx);
-
- /* Reset the cycle count */
- __core_reg_set(TXTACTCYC, 0);
+ local64_set(&event->prev_count, __core_reg_get(TXTACTCYC));
goto unlock;
}
/* Check for a core internal or performance channel event. */
if (tmp) {
- void *perf_addr = (void *)PERF_COUNT(idx);
+ void *perf_addr;
/*
* Anything other than a cycle count will write the low-
@@ -632,9 +642,14 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx)
case 0xf0:
perf_addr = (void *)PERF_CHAN(idx);
break;
+
+ default:
+ perf_addr = NULL;
+ break;
}
- metag_out32((tmp & 0x0f), perf_addr);
+ if (perf_addr)
+ metag_out32((config & 0x0f), perf_addr);
/*
* Now we use the high nibble as the performance event to
@@ -643,13 +658,21 @@ static void metag_pmu_enable_counter(struct hw_perf_event *event, int idx)
config = tmp >> 4;
}
- /*
- * Enabled counters start from 0. Early cores clear the count on
- * write but newer cores don't, so we make sure that the count is
- * set to 0.
- */
tmp = ((config & 0xf) << 28) |
- ((1 << 24) << cpu_2_hwthread_id[get_cpu()]);
+ ((1 << 24) << hard_processor_id());
+ if (metag_pmu->max_period)
+ /*
+ * Cores supporting overflow interrupts may have had the counter
+ * set to a specific value that needs preserving.
+ */
+ tmp |= metag_in32(PERF_COUNT(idx)) & 0x00ffffff;
+ else
+ /*
+ * Older cores reset the counter on write, so prev_count needs
+ * resetting too so we can calculate a correct delta.
+ */
+ local64_set(&event->prev_count, 0);
+
metag_out32(tmp, PERF_COUNT(idx));
unlock:
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
@@ -693,9 +716,8 @@ static u64 metag_pmu_read_counter(int idx)
{
u32 tmp = 0;
- /* The act of reading the cycle counter also clears it */
if (METAG_INST_COUNTER == idx) {
- __core_reg_swap(TXTACTCYC, tmp);
+ tmp = __core_reg_get(TXTACTCYC);
goto out;
}
@@ -764,10 +786,16 @@ static irqreturn_t metag_pmu_counter_overflow(int irq, void *dev)
/*
* Enable the counter again once core overflow processing has
- * completed.
+ * completed. Note the counter value may have been modified while it was
+ * inactive to set it up ready for the next interrupt.
*/
- if (!perf_event_overflow(event, &sampledata, regs))
+ if (!perf_event_overflow(event, &sampledata, regs)) {
+ __global_lock2(flags);
+ counter = (counter & 0xff000000) |
+ (metag_in32(PERF_COUNT(idx)) & 0x00ffffff);
metag_out32(counter, PERF_COUNT(idx));
+ __global_unlock2(flags);
+ }
return IRQ_HANDLED;
}
@@ -785,8 +813,8 @@ static struct metag_pmu _metag_pmu = {
};
/* PMU CPU hotplug notifier */
-static int __cpuinit metag_pmu_cpu_notify(struct notifier_block *b,
- unsigned long action, void *hcpu)
+static int metag_pmu_cpu_notify(struct notifier_block *b, unsigned long action,
+ void *hcpu)
{
unsigned int cpu = (unsigned int)hcpu;
struct cpu_hw_events *cpuc = &per_cpu(cpu_hw_events, cpu);
@@ -800,7 +828,7 @@ static int __cpuinit metag_pmu_cpu_notify(struct notifier_block *b,
return NOTIFY_OK;
}
-static struct notifier_block __cpuinitdata metag_pmu_notifier = {
+static struct notifier_block metag_pmu_notifier = {
.notifier_call = metag_pmu_cpu_notify,
};
@@ -830,7 +858,7 @@ static int __init init_hw_perf_events(void)
metag_pmu->max_period = 0;
}
- metag_pmu->name = "Meta 2";
+ metag_pmu->name = "meta2";
metag_pmu->version = version;
metag_pmu->pmu = pmu;
}
@@ -854,7 +882,7 @@ static int __init init_hw_perf_events(void)
}
register_cpu_notifier(&metag_pmu_notifier);
- ret = perf_pmu_register(&pmu, (char *)metag_pmu->name, PERF_TYPE_RAW);
+ ret = perf_pmu_register(&pmu, metag_pmu->name, PERF_TYPE_RAW);
out:
return ret;
}
diff --git a/arch/metag/kernel/process.c b/arch/metag/kernel/process.c
index c6efe62e5b7..483dff986a2 100644
--- a/arch/metag/kernel/process.c
+++ b/arch/metag/kernel/process.c
@@ -22,6 +22,7 @@
#include <linux/pm.h>
#include <linux/syscalls.h>
#include <linux/uaccess.h>
+#include <linux/smp.h>
#include <asm/core_reg.h>
#include <asm/user_gateway.h>
#include <asm/tcm.h>
@@ -31,7 +32,7 @@
/*
* Wait for the next interrupt and enable local interrupts
*/
-static inline void arch_idle(void)
+void arch_cpu_idle(void)
{
int tmp;
@@ -59,36 +60,12 @@ static inline void arch_idle(void)
: "r" (get_trigger_mask()));
}
-void cpu_idle(void)
-{
- set_thread_flag(TIF_POLLING_NRFLAG);
-
- while (1) {
- tick_nohz_idle_enter();
- rcu_idle_enter();
-
- while (!need_resched()) {
- /*
- * We need to disable interrupts here to ensure we don't
- * miss a wakeup call.
- */
- local_irq_disable();
- if (!need_resched()) {
#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(smp_processor_id()))
- cpu_die();
-#endif
- arch_idle();
- } else {
- local_irq_enable();
- }
- }
-
- rcu_idle_exit();
- tick_nohz_idle_exit();
- schedule_preempt_disabled();
- }
+void arch_cpu_idle_dead(void)
+{
+ cpu_die();
}
+#endif
void (*pm_power_off)(void);
EXPORT_SYMBOL(pm_power_off);
@@ -152,6 +129,8 @@ void show_regs(struct pt_regs *regs)
"D1.7 "
};
+ show_regs_print_info(KERN_INFO);
+
pr_info(" pt_regs @ %p\n", regs);
pr_info(" SaveMask = 0x%04hx\n", regs->ctx.SaveMask);
pr_info(" Flags = 0x%04hx (%c%c%c%c)\n", regs->ctx.Flags,
diff --git a/arch/metag/kernel/ptrace.c b/arch/metag/kernel/ptrace.c
index 47a8828615a..7563628822b 100644
--- a/arch/metag/kernel/ptrace.c
+++ b/arch/metag/kernel/ptrace.c
@@ -288,10 +288,36 @@ static int metag_rp_state_set(struct task_struct *target,
return metag_rp_state_copyin(regs, pos, count, kbuf, ubuf);
}
+static int metag_tls_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ void __user *tls = target->thread.tls_ptr;
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
+}
+
+static int metag_tls_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ int ret;
+ void __user *tls;
+
+ ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &tls, 0, -1);
+ if (ret)
+ return ret;
+
+ target->thread.tls_ptr = tls;
+ return ret;
+}
+
enum metag_regset {
REGSET_GENERAL,
REGSET_CBUF,
REGSET_READPIPE,
+ REGSET_TLS,
};
static const struct user_regset metag_regsets[] = {
@@ -319,6 +345,14 @@ static const struct user_regset metag_regsets[] = {
.get = metag_rp_state_get,
.set = metag_rp_state_set,
},
+ [REGSET_TLS] = {
+ .core_note_type = NT_METAG_TLS,
+ .n = 1,
+ .size = sizeof(void *),
+ .align = sizeof(void *),
+ .get = metag_tls_get,
+ .set = metag_tls_set,
+ },
};
static const struct user_regset_view user_metag_view = {
diff --git a/arch/metag/kernel/setup.c b/arch/metag/kernel/setup.c
index 879246170ae..31cf53d0eba 100644
--- a/arch/metag/kernel/setup.c
+++ b/arch/metag/kernel/setup.c
@@ -20,6 +20,7 @@
#include <linux/memblock.h>
#include <linux/mm.h>
#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
#include <linux/pfn.h>
#include <linux/root_dev.h>
#include <linux/sched.h>
@@ -41,7 +42,6 @@
#include <asm/mmu.h>
#include <asm/mmzone.h>
#include <asm/processor.h>
-#include <asm/prom.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/traps.h>
@@ -105,16 +105,12 @@
extern char _heap_start[];
-#ifdef CONFIG_METAG_BUILTIN_DTB
-extern u32 __dtb_start[];
-#endif
-
#ifdef CONFIG_DA_CONSOLE
/* Our early channel based console driver */
extern struct console dash_console;
#endif
-struct machine_desc *machine_desc __initdata;
+const struct machine_desc *machine_desc __initdata;
/*
* Map a Linux CPU number to a hardware thread ID
@@ -124,6 +120,7 @@ struct machine_desc *machine_desc __initdata;
u8 cpu_2_hwthread_id[NR_CPUS] __read_mostly = {
[0 ... NR_CPUS-1] = BAD_HWTHREAD_ID
};
+EXPORT_SYMBOL_GPL(cpu_2_hwthread_id);
/*
* Map a hardware thread ID to a Linux CPU number
@@ -300,13 +297,9 @@ void __init setup_arch(char **cmdline_p)
* rather than the version from the bootloader. This makes call
* stacks easier to understand and may allow us to unmap the
* bootloader at some point.
- *
- * We need to keep the LWK handler that TBI installed in order to
- * be able to do inter-thread comms.
*/
for (i = 0; i <= TBID_SIGNUM_MAX; i++)
- if (i != TBID_SIGNUM_LWK)
- _pTBI->fnSigs[i] = __TBIUnExpXXX;
+ _pTBI->fnSigs[i] = __TBIUnExpXXX;
/* A Meta requirement is that the kernel is loaded (virtually)
* at the PAGE_OFFSET.
@@ -406,9 +399,7 @@ void __init setup_arch(char **cmdline_p)
cpu_2_hwthread_id[smp_processor_id()] = hard_processor_id();
hwthread_id_2_cpu[hard_processor_id()] = smp_processor_id();
- /* Copy device tree blob into non-init memory before unflattening */
- copy_fdt();
- unflatten_device_tree();
+ unflatten_and_copy_device_tree();
#ifdef CONFIG_SMP
smp_init_cpus();
@@ -423,6 +414,9 @@ static int __init customize_machine(void)
/* customizes platform devices, or adds new ones */
if (machine_desc->init_machine)
machine_desc->init_machine();
+ else
+ of_platform_populate(NULL, of_default_bus_match_table, NULL,
+ NULL);
return 0;
}
arch_initcall(customize_machine);
@@ -586,20 +580,20 @@ PTBI pTBI_get(unsigned int cpu)
EXPORT_SYMBOL(pTBI_get);
#if defined(CONFIG_METAG_DSP) && defined(CONFIG_METAG_FPU)
-char capabilites[] = "dsp fpu";
+static char capabilities[] = "dsp fpu";
#elif defined(CONFIG_METAG_DSP)
-char capabilites[] = "dsp";
+static char capabilities[] = "dsp";
#elif defined(CONFIG_METAG_FPU)
-char capabilites[] = "fpu";
+static char capabilities[] = "fpu";
#else
-char capabilites[] = "";
+static char capabilities[] = "";
#endif
static struct ctl_table caps_kern_table[] = {
{
.procname = "capabilities",
- .data = capabilites,
- .maxlen = sizeof(capabilites),
+ .data = capabilities,
+ .maxlen = sizeof(capabilities),
.mode = 0444,
.proc_handler = proc_dostring,
},
diff --git a/arch/metag/kernel/signal.c b/arch/metag/kernel/signal.c
index 3be61cf0b14..b9e4a82d2bd 100644
--- a/arch/metag/kernel/signal.c
+++ b/arch/metag/kernel/signal.c
@@ -152,18 +152,18 @@ static void __user *get_sigframe(struct k_sigaction *ka, unsigned long sp,
return (void __user *)sp;
}
-static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(struct ksignal *ksig, sigset_t *set,
+ struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
- int err = -EFAULT;
+ int err;
unsigned long code;
- frame = get_sigframe(ka, regs->REG_SP, sizeof(*frame));
+ frame = get_sigframe(&ksig->ka, regs->REG_SP, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto out;
+ return -EFAULT;
- err = copy_siginfo_to_user(&frame->info, info);
+ err = copy_siginfo_to_user(&frame->info, &ksig->info);
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
@@ -174,7 +174,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
- goto out;
+ return -EFAULT;
/* Set up to return from userspace. */
@@ -187,15 +187,15 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(code, (unsigned long __user *)(&frame->retcode[1]));
if (err)
- goto out;
+ return -EFAULT;
/* Set up registers for signal handler */
regs->REG_RTP = (unsigned long) frame->retcode;
regs->REG_SP = (unsigned long) frame + sizeof(*frame);
- regs->REG_ARG1 = sig;
+ regs->REG_ARG1 = ksig->sig;
regs->REG_ARG2 = (unsigned long) &frame->info;
regs->REG_ARG3 = (unsigned long) &frame->uc;
- regs->REG_PC = (unsigned long) ka->sa.sa_handler;
+ regs->REG_PC = (unsigned long) ksig->ka.sa.sa_handler;
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08x pr=%08x\n",
current->comm, current->pid, frame, regs->REG_PC,
@@ -205,24 +205,19 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* effective cache flush - directed rather than 'full flush'.
*/
flush_cache_sigtramp(regs->REG_RTP, sizeof(frame->retcode));
-out:
- if (err) {
- force_sigsegv(sig, current);
- return -EFAULT;
- }
+
return 0;
}
-static void handle_signal(unsigned long sig, siginfo_t *info,
- struct k_sigaction *ka, struct pt_regs *regs)
+static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
sigset_t *oldset = sigmask_to_save();
+ int ret;
/* Set up the stack frame */
- if (setup_rt_frame(sig, ka, info, oldset, regs))
- return;
+ ret = setup_rt_frame(ksig, oldset, regs);
- signal_delivered(sig, info, ka, regs, test_thread_flag(TIF_SINGLESTEP));
+ signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP));
}
/*
@@ -235,10 +230,8 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
static int do_signal(struct pt_regs *regs, int syscall)
{
unsigned int retval = 0, continue_addr = 0, restart_addr = 0;
- struct k_sigaction ka;
- siginfo_t info;
- int signr;
int restart = 0;
+ struct ksignal ksig;
/*
* By the end of rt_sigreturn the context describes the point that the
@@ -275,7 +268,8 @@ static int do_signal(struct pt_regs *regs, int syscall)
* Get the signal to deliver. When running under ptrace, at this point
* the debugger may change all our registers ...
*/
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ get_signal(&ksig);
+
/*
* Depending on the signal settings we may need to revert the decision
* to restart the system call. But skip this if a debugger has chosen to
@@ -283,19 +277,19 @@ static int do_signal(struct pt_regs *regs, int syscall)
*/
if (regs->REG_PC != restart_addr)
restart = 0;
- if (signr > 0) {
+ if (ksig.sig > 0) {
if (unlikely(restart)) {
if (retval == -ERESTARTNOHAND
|| retval == -ERESTART_RESTARTBLOCK
|| (retval == -ERESTARTSYS
- && !(ka.sa.sa_flags & SA_RESTART))) {
+ && !(ksig.ka.sa.sa_flags & SA_RESTART))) {
regs->REG_RETVAL = -EINTR;
regs->REG_PC = continue_addr;
}
}
/* Whee! Actually deliver the signal. */
- handle_signal(signr, &info, &ka, regs);
+ handle_signal(&ksig, regs);
return 0;
}
diff --git a/arch/metag/kernel/smp.c b/arch/metag/kernel/smp.c
index 4b6d1f14df3..f006d2276f4 100644
--- a/arch/metag/kernel/smp.c
+++ b/arch/metag/kernel/smp.c
@@ -8,6 +8,7 @@
* published by the Free Software Foundation.
*/
#include <linux/atomic.h>
+#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/spinlock.h>
@@ -28,6 +29,8 @@
#include <asm/cachepart.h>
#include <asm/core_reg.h>
#include <asm/cpu.h>
+#include <asm/global_lock.h>
+#include <asm/metag_mem.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -37,6 +40,9 @@
#include <asm/hwthread.h>
#include <asm/traps.h>
+#define SYSC_DCPART(n) (SYSC_DCPART0 + SYSC_xCPARTn_STRIDE * (n))
+#define SYSC_ICPART(n) (SYSC_ICPART0 + SYSC_xCPARTn_STRIDE * (n))
+
DECLARE_PER_CPU(PTBI, pTBI);
void *secondary_data_stack;
@@ -57,10 +63,12 @@ static DEFINE_PER_CPU(struct ipi_data, ipi_data) = {
static DEFINE_SPINLOCK(boot_lock);
+static DECLARE_COMPLETION(cpu_running);
+
/*
* "thread" is assumed to be a valid Meta hardware thread ID.
*/
-int __cpuinit boot_secondary(unsigned int thread, struct task_struct *idle)
+static int boot_secondary(unsigned int thread, struct task_struct *idle)
{
u32 val;
@@ -99,7 +107,113 @@ int __cpuinit boot_secondary(unsigned int thread, struct task_struct *idle)
return 0;
}
-int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
+/**
+ * describe_cachepart_change: describe a change to cache partitions.
+ * @thread: Hardware thread number.
+ * @label: Label of cache type, e.g. "dcache" or "icache".
+ * @sz: Total size of the cache.
+ * @old: Old cache partition configuration (*CPART* register).
+ * @new: New cache partition configuration (*CPART* register).
+ *
+ * If the cache partition has changed, prints a message to the log describing
+ * those changes.
+ */
+static void describe_cachepart_change(unsigned int thread, const char *label,
+ unsigned int sz, unsigned int old,
+ unsigned int new)
+{
+ unsigned int lor1, land1, gor1, gand1;
+ unsigned int lor2, land2, gor2, gand2;
+ unsigned int diff = old ^ new;
+
+ if (!diff)
+ return;
+
+ pr_info("Thread %d: %s partition changed:", thread, label);
+ if (diff & (SYSC_xCPARTL_OR_BITS | SYSC_xCPARTL_AND_BITS)) {
+ lor1 = (old & SYSC_xCPARTL_OR_BITS) >> SYSC_xCPARTL_OR_S;
+ lor2 = (new & SYSC_xCPARTL_OR_BITS) >> SYSC_xCPARTL_OR_S;
+ land1 = (old & SYSC_xCPARTL_AND_BITS) >> SYSC_xCPARTL_AND_S;
+ land2 = (new & SYSC_xCPARTL_AND_BITS) >> SYSC_xCPARTL_AND_S;
+ pr_cont(" L:%#x+%#x->%#x+%#x",
+ (lor1 * sz) >> 4,
+ ((land1 + 1) * sz) >> 4,
+ (lor2 * sz) >> 4,
+ ((land2 + 1) * sz) >> 4);
+ }
+ if (diff & (SYSC_xCPARTG_OR_BITS | SYSC_xCPARTG_AND_BITS)) {
+ gor1 = (old & SYSC_xCPARTG_OR_BITS) >> SYSC_xCPARTG_OR_S;
+ gor2 = (new & SYSC_xCPARTG_OR_BITS) >> SYSC_xCPARTG_OR_S;
+ gand1 = (old & SYSC_xCPARTG_AND_BITS) >> SYSC_xCPARTG_AND_S;
+ gand2 = (new & SYSC_xCPARTG_AND_BITS) >> SYSC_xCPARTG_AND_S;
+ pr_cont(" G:%#x+%#x->%#x+%#x",
+ (gor1 * sz) >> 4,
+ ((gand1 + 1) * sz) >> 4,
+ (gor2 * sz) >> 4,
+ ((gand2 + 1) * sz) >> 4);
+ }
+ if (diff & SYSC_CWRMODE_BIT)
+ pr_cont(" %sWR",
+ (new & SYSC_CWRMODE_BIT) ? "+" : "-");
+ if (diff & SYSC_DCPART_GCON_BIT)
+ pr_cont(" %sGCOn",
+ (new & SYSC_DCPART_GCON_BIT) ? "+" : "-");
+ pr_cont("\n");
+}
+
+/**
+ * setup_smp_cache: ensure cache coherency for new SMP thread.
+ * @thread: New hardware thread number.
+ *
+ * Ensures that coherency is enabled and that the threads share the same cache
+ * partitions.
+ */
+static void setup_smp_cache(unsigned int thread)
+{
+ unsigned int this_thread, lflags;
+ unsigned int dcsz, dcpart_this, dcpart_old, dcpart_new;
+ unsigned int icsz, icpart_old, icpart_new;
+
+ /*
+ * Copy over the current thread's cache partition configuration to the
+ * new thread so that they share cache partitions.
+ */
+ __global_lock2(lflags);
+ this_thread = hard_processor_id();
+ /* Share dcache partition */
+ dcpart_this = metag_in32(SYSC_DCPART(this_thread));
+ dcpart_old = metag_in32(SYSC_DCPART(thread));
+ dcpart_new = dcpart_this;
+#if PAGE_OFFSET < LINGLOBAL_BASE
+ /*
+ * For the local data cache to be coherent the threads must also have
+ * GCOn enabled.
+ */
+ dcpart_new |= SYSC_DCPART_GCON_BIT;
+ metag_out32(dcpart_new, SYSC_DCPART(this_thread));
+#endif
+ metag_out32(dcpart_new, SYSC_DCPART(thread));
+ /* Share icache partition too */
+ icpart_new = metag_in32(SYSC_ICPART(this_thread));
+ icpart_old = metag_in32(SYSC_ICPART(thread));
+ metag_out32(icpart_new, SYSC_ICPART(thread));
+ __global_unlock2(lflags);
+
+ /*
+ * Log if the cache partitions were altered so the user is aware of any
+ * potential unintentional cache wastage.
+ */
+ dcsz = get_dcache_size();
+ icsz = get_dcache_size();
+ describe_cachepart_change(this_thread, "dcache", dcsz,
+ dcpart_this, dcpart_new);
+ describe_cachepart_change(thread, "dcache", dcsz,
+ dcpart_old, dcpart_new);
+ describe_cachepart_change(thread, "icache", icsz,
+ icpart_old, icpart_new);
+}
+
+int __cpu_up(unsigned int cpu, struct task_struct *idle)
{
unsigned int thread = cpu_2_hwthread_id[cpu];
int ret;
@@ -108,6 +222,8 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
flush_tlb_all();
+ setup_smp_cache(thread);
+
/*
* Tell the secondary CPU where to find its idle thread's stack.
*/
@@ -120,20 +236,12 @@ int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle)
*/
ret = boot_secondary(thread, idle);
if (ret == 0) {
- unsigned long timeout;
-
/*
* CPU was successfully started, wait for it
* to come online or time out.
*/
- timeout = jiffies + HZ;
- while (time_before(jiffies, timeout)) {
- if (cpu_online(cpu))
- break;
-
- udelay(10);
- barrier();
- }
+ wait_for_completion_timeout(&cpu_running,
+ msecs_to_jiffies(1000));
if (!cpu_online(cpu))
ret = -EIO;
@@ -158,10 +266,9 @@ static DECLARE_COMPLETION(cpu_killed);
/*
* __cpu_disable runs on the processor to be shutdown.
*/
-int __cpuexit __cpu_disable(void)
+int __cpu_disable(void)
{
unsigned int cpu = smp_processor_id();
- struct task_struct *p;
/*
* Take this CPU offline. Once we clear this, we can't return,
@@ -181,12 +288,7 @@ int __cpuexit __cpu_disable(void)
flush_cache_all();
local_flush_tlb_all();
- read_lock(&tasklist_lock);
- for_each_process(p) {
- if (p->mm)
- cpumask_clear_cpu(cpu, mm_cpumask(p->mm));
- }
- read_unlock(&tasklist_lock);
+ clear_tasks_mm_cpumask(cpu);
return 0;
}
@@ -195,7 +297,7 @@ int __cpuexit __cpu_disable(void)
* called on the thread which is asking for a CPU to be shutdown -
* waits until shutdown has completed, or it is timed out.
*/
-void __cpuexit __cpu_die(unsigned int cpu)
+void __cpu_die(unsigned int cpu)
{
if (!wait_for_completion_timeout(&cpu_killed, msecs_to_jiffies(1)))
pr_err("CPU%u: unable to kill\n", cpu);
@@ -207,7 +309,7 @@ void __cpuexit __cpu_die(unsigned int cpu)
* Note that we do not return from this function. If this cpu is
* brought online again it will need to run secondary_startup().
*/
-void __cpuexit cpu_die(void)
+void cpu_die(void)
{
local_irq_disable();
idle_task_exit();
@@ -222,7 +324,7 @@ void __cpuexit cpu_die(void)
* Called by both boot and secondaries to move global data into
* per-processor storage.
*/
-void __cpuinit smp_store_cpu_info(unsigned int cpuid)
+void smp_store_cpu_info(unsigned int cpuid)
{
struct cpuinfo_metag *cpu_info = &per_cpu(cpu_data, cpuid);
@@ -270,12 +372,7 @@ asmlinkage void secondary_start_kernel(void)
setup_priv();
- /*
- * Enable local interrupts.
- */
- tbi_startup_interrupt(TBID_SIGNUM_TRT);
notify_cpu_starting(cpu);
- local_irq_enable();
pr_info("CPU%u (thread %u): Booted secondary processor\n",
cpu, cpu_2_hwthread_id[cpu]);
@@ -287,17 +384,18 @@ asmlinkage void secondary_start_kernel(void)
* OK, now it's safe to let the boot CPU continue
*/
set_cpu_online(cpu, true);
+ complete(&cpu_running);
/*
- * Check for cache aliasing.
- * Preemption is disabled
+ * Enable local interrupts.
*/
- check_for_cache_aliasing(cpu);
+ tbi_startup_interrupt(TBID_SIGNUM_TRT);
+ local_irq_enable();
/*
* OK, it's off to the idle thread for us
*/
- cpu_idle();
+ cpu_startup_entry(CPUHP_ONLINE);
}
void __init smp_cpus_done(unsigned int max_cpus)
@@ -393,7 +491,7 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
void arch_send_call_function_single_ipi(int cpu)
{
- send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);
+ send_ipi_message(cpumask_of(cpu), IPI_CALL_FUNC);
}
void show_ipi_list(struct seq_file *p)
@@ -419,11 +517,10 @@ static DEFINE_SPINLOCK(stop_lock);
*
* Bit 0 - Inter-processor function call
*/
-static int do_IPI(struct pt_regs *regs)
+static int do_IPI(void)
{
unsigned int cpu = smp_processor_id();
struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
- struct pt_regs *old_regs = set_irq_regs(regs);
unsigned long msgs, nextmsg;
int handled = 0;
@@ -448,10 +545,6 @@ static int do_IPI(struct pt_regs *regs)
generic_smp_call_function_interrupt();
break;
- case IPI_CALL_FUNC_SINGLE:
- generic_smp_call_function_single_interrupt();
- break;
-
default:
pr_crit("CPU%u: Unknown IPI message 0x%lx\n",
cpu, nextmsg);
@@ -459,8 +552,6 @@ static int do_IPI(struct pt_regs *regs)
}
}
- set_irq_regs(old_regs);
-
return handled;
}
@@ -526,7 +617,7 @@ static void kick_raise_softirq(cpumask_t callmap, unsigned int irq)
static TBIRES ipi_handler(TBIRES State, int SigNum, int Triggers,
int Inst, PTBI pTBI, int *handled)
{
- *handled = do_IPI((struct pt_regs *)State.Sig.pCtx);
+ *handled = do_IPI();
return State;
}
diff --git a/arch/metag/kernel/time.c b/arch/metag/kernel/time.c
index 17dc10733b2..f1c8c53dace 100644
--- a/arch/metag/kernel/time.c
+++ b/arch/metag/kernel/time.c
@@ -5,11 +5,21 @@
*
*/
-#include <linux/init.h>
-
#include <clocksource/metag_generic.h>
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <asm/clock.h>
void __init time_init(void)
{
+#ifdef CONFIG_COMMON_CLK
+ /* Init clocks from device tree */
+ of_clk_init(NULL);
+#endif
+
+ /* Init meta clocks, particularly the core clock */
+ init_metag_clocks();
+
+ /* Set up the timer clock sources */
metag_generic_timer_init();
}
diff --git a/arch/metag/kernel/topology.c b/arch/metag/kernel/topology.c
index bec3dec4922..4ba595701f7 100644
--- a/arch/metag/kernel/topology.c
+++ b/arch/metag/kernel/topology.c
@@ -19,6 +19,7 @@
DEFINE_PER_CPU(struct cpuinfo_metag, cpu_data);
cpumask_t cpu_core_map[NR_CPUS];
+EXPORT_SYMBOL(cpu_core_map);
static cpumask_t cpu_coregroup_map(unsigned int cpu)
{
diff --git a/arch/metag/kernel/traps.c b/arch/metag/kernel/traps.c
index 8961f247b50..17b2e2e38d5 100644
--- a/arch/metag/kernel/traps.c
+++ b/arch/metag/kernel/traps.c
@@ -33,6 +33,7 @@
#include <asm/siginfo.h>
#include <asm/traps.h>
#include <asm/hwthread.h>
+#include <asm/setup.h>
#include <asm/switch.h>
#include <asm/user_gateway.h>
#include <asm/syscall.h>
@@ -87,8 +88,8 @@ const char *trap_name(int trapno)
static DEFINE_SPINLOCK(die_lock);
-void die(const char *str, struct pt_regs *regs, long err,
- unsigned long addr)
+void __noreturn die(const char *str, struct pt_regs *regs,
+ long err, unsigned long addr)
{
static int die_counter;
@@ -811,15 +812,14 @@ static void set_trigger_mask(unsigned int mask)
}
#endif
-void __cpuinit per_cpu_trap_init(unsigned long cpu)
+void per_cpu_trap_init(unsigned long cpu)
{
TBIRES int_context;
unsigned int thread = cpu_2_hwthread_id[cpu];
set_trigger_mask(TBI_INTS_INIT(thread) | /* interrupts */
TBI_TRIG_BIT(TBID_SIGNUM_LWK) | /* low level kick */
- TBI_TRIG_BIT(TBID_SIGNUM_SW1) |
- TBI_TRIG_BIT(TBID_SIGNUM_SWS));
+ TBI_TRIG_BIT(TBID_SIGNUM_SW1));
/* non-priv - use current stack */
int_context.Sig.pCtx = NULL;
@@ -841,7 +841,7 @@ void __init trap_init(void)
_pTBI->fnSigs[TBID_SIGNUM_SW1] = switch1_handler;
_pTBI->fnSigs[TBID_SIGNUM_SW2] = switchx_handler;
_pTBI->fnSigs[TBID_SIGNUM_SW3] = switchx_handler;
- _pTBI->fnSigs[TBID_SIGNUM_SWK] = kick_handler;
+ _pTBI->fnSigs[TBID_SIGNUM_LWK] = kick_handler;
#ifdef CONFIG_METAG_META21
_pTBI->fnSigs[TBID_SIGNUM_DFR] = __TBIHandleDFR;
@@ -987,9 +987,3 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
show_trace(tsk, sp, NULL);
}
-
-void dump_stack(void)
-{
- show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 01:02:04 +0000