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sparc64: Refactor OBP cpu scanning code using an iterator.
With feedback from Sam Ravnborg. Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
8249778908
commit
9bab54143c
@ -86,6 +86,7 @@ extern int of_node_to_nid(struct device_node *dp);
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#endif
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extern void prom_build_devicetree(void);
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extern void of_populate_present_mask(void);
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/* Dummy ref counting routines - to be implemented later */
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static inline struct device_node *of_node_get(struct device_node *node)
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@ -374,75 +374,26 @@ static const char *get_mid_prop(void)
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return (tlb_type == spitfire ? "upa-portid" : "portid");
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}
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struct device_node *of_find_node_by_cpuid(int cpuid)
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{
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struct device_node *dp;
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const char *mid_prop = get_mid_prop();
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for_each_node_by_type(dp, "cpu") {
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int id = of_getintprop_default(dp, mid_prop, -1);
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const char *this_mid_prop = mid_prop;
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if (id < 0) {
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this_mid_prop = "cpuid";
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id = of_getintprop_default(dp, this_mid_prop, -1);
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}
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if (id < 0) {
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prom_printf("OF: Serious problem, cpu lacks "
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"%s property", this_mid_prop);
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prom_halt();
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}
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if (cpuid == id)
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return dp;
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}
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return NULL;
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}
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void __init of_fill_in_cpu_data(void)
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static void *of_iterate_over_cpus(void *(*func)(struct device_node *, int, int), int arg)
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{
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struct device_node *dp;
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const char *mid_prop;
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if (tlb_type == hypervisor)
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return;
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mid_prop = get_mid_prop();
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ncpus_probed = 0;
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for_each_node_by_type(dp, "cpu") {
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int cpuid = of_getintprop_default(dp, mid_prop, -1);
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const char *this_mid_prop = mid_prop;
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struct device_node *portid_parent;
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int portid = -1;
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void *ret;
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portid_parent = NULL;
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if (cpuid < 0) {
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this_mid_prop = "cpuid";
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cpuid = of_getintprop_default(dp, this_mid_prop, -1);
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if (cpuid >= 0) {
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int limit = 2;
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portid_parent = dp;
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while (limit--) {
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portid_parent = portid_parent->parent;
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if (!portid_parent)
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break;
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portid = of_getintprop_default(portid_parent,
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"portid", -1);
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if (portid >= 0)
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break;
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}
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}
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}
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if (cpuid < 0) {
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prom_printf("OF: Serious problem, cpu lacks "
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"%s property", this_mid_prop);
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prom_halt();
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}
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ncpus_probed++;
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#ifdef CONFIG_SMP
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if (cpuid >= NR_CPUS) {
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printk(KERN_WARNING "Ignoring CPU %d which is "
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@ -450,79 +401,143 @@ void __init of_fill_in_cpu_data(void)
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cpuid, NR_CPUS);
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continue;
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}
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#else
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/* On uniprocessor we only want the values for the
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* real physical cpu the kernel booted onto, however
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* cpu_data() only has one entry at index 0.
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*/
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if (cpuid != real_hard_smp_processor_id())
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continue;
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cpuid = 0;
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#endif
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ret = func(dp, cpuid, arg);
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if (ret)
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return ret;
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}
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return NULL;
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}
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cpu_data(cpuid).clock_tick =
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of_getintprop_default(dp, "clock-frequency", 0);
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static void *check_cpu_node(struct device_node *dp, int cpuid, int id)
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{
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if (id == cpuid)
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return dp;
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return NULL;
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}
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if (portid_parent) {
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cpu_data(cpuid).dcache_size =
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of_getintprop_default(dp, "l1-dcache-size",
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16 * 1024);
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cpu_data(cpuid).dcache_line_size =
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of_getintprop_default(dp, "l1-dcache-line-size",
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32);
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cpu_data(cpuid).icache_size =
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of_getintprop_default(dp, "l1-icache-size",
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8 * 1024);
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cpu_data(cpuid).icache_line_size =
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of_getintprop_default(dp, "l1-icache-line-size",
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32);
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cpu_data(cpuid).ecache_size =
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of_getintprop_default(dp, "l2-cache-size", 0);
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cpu_data(cpuid).ecache_line_size =
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of_getintprop_default(dp, "l2-cache-line-size", 0);
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if (!cpu_data(cpuid).ecache_size ||
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!cpu_data(cpuid).ecache_line_size) {
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cpu_data(cpuid).ecache_size =
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of_getintprop_default(portid_parent,
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"l2-cache-size",
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(4 * 1024 * 1024));
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cpu_data(cpuid).ecache_line_size =
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of_getintprop_default(portid_parent,
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"l2-cache-line-size", 64);
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}
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struct device_node *of_find_node_by_cpuid(int cpuid)
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{
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return of_iterate_over_cpus(check_cpu_node, cpuid);
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}
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cpu_data(cpuid).core_id = portid + 1;
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cpu_data(cpuid).proc_id = portid;
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static void *record_one_cpu(struct device_node *dp, int cpuid, int arg)
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{
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ncpus_probed++;
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#ifdef CONFIG_SMP
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sparc64_multi_core = 1;
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set_cpu_present(cpuid, true);
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set_cpu_possible(cpuid, true);
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#endif
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} else {
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cpu_data(cpuid).dcache_size =
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of_getintprop_default(dp, "dcache-size", 16 * 1024);
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cpu_data(cpuid).dcache_line_size =
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of_getintprop_default(dp, "dcache-line-size", 32);
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return NULL;
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}
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cpu_data(cpuid).icache_size =
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of_getintprop_default(dp, "icache-size", 16 * 1024);
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cpu_data(cpuid).icache_line_size =
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of_getintprop_default(dp, "icache-line-size", 32);
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void __init of_populate_present_mask(void)
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{
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if (tlb_type == hypervisor)
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return;
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ncpus_probed = 0;
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of_iterate_over_cpus(record_one_cpu, 0);
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}
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static void *fill_in_one_cpu(struct device_node *dp, int cpuid, int arg)
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{
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struct device_node *portid_parent = NULL;
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int portid = -1;
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if (of_find_property(dp, "cpuid", NULL)) {
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int limit = 2;
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portid_parent = dp;
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while (limit--) {
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portid_parent = portid_parent->parent;
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if (!portid_parent)
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break;
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portid = of_getintprop_default(portid_parent,
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"portid", -1);
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if (portid >= 0)
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break;
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}
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}
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#ifndef CONFIG_SMP
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/* On uniprocessor we only want the values for the
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* real physical cpu the kernel booted onto, however
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* cpu_data() only has one entry at index 0.
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*/
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if (cpuid != real_hard_smp_processor_id())
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return NULL;
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cpuid = 0;
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#endif
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cpu_data(cpuid).clock_tick =
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of_getintprop_default(dp, "clock-frequency", 0);
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if (portid_parent) {
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cpu_data(cpuid).dcache_size =
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of_getintprop_default(dp, "l1-dcache-size",
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16 * 1024);
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cpu_data(cpuid).dcache_line_size =
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of_getintprop_default(dp, "l1-dcache-line-size",
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32);
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cpu_data(cpuid).icache_size =
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of_getintprop_default(dp, "l1-icache-size",
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8 * 1024);
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cpu_data(cpuid).icache_line_size =
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of_getintprop_default(dp, "l1-icache-line-size",
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32);
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cpu_data(cpuid).ecache_size =
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of_getintprop_default(dp, "l2-cache-size", 0);
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cpu_data(cpuid).ecache_line_size =
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of_getintprop_default(dp, "l2-cache-line-size", 0);
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if (!cpu_data(cpuid).ecache_size ||
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!cpu_data(cpuid).ecache_line_size) {
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cpu_data(cpuid).ecache_size =
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of_getintprop_default(dp, "ecache-size",
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of_getintprop_default(portid_parent,
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"l2-cache-size",
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(4 * 1024 * 1024));
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cpu_data(cpuid).ecache_line_size =
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of_getintprop_default(dp, "ecache-line-size", 64);
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cpu_data(cpuid).core_id = 0;
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cpu_data(cpuid).proc_id = -1;
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of_getintprop_default(portid_parent,
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"l2-cache-line-size", 64);
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}
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cpu_data(cpuid).core_id = portid + 1;
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cpu_data(cpuid).proc_id = portid;
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#ifdef CONFIG_SMP
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set_cpu_present(cpuid, true);
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set_cpu_possible(cpuid, true);
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sparc64_multi_core = 1;
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#endif
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} else {
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cpu_data(cpuid).dcache_size =
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of_getintprop_default(dp, "dcache-size", 16 * 1024);
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cpu_data(cpuid).dcache_line_size =
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of_getintprop_default(dp, "dcache-line-size", 32);
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cpu_data(cpuid).icache_size =
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of_getintprop_default(dp, "icache-size", 16 * 1024);
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cpu_data(cpuid).icache_line_size =
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of_getintprop_default(dp, "icache-line-size", 32);
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cpu_data(cpuid).ecache_size =
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of_getintprop_default(dp, "ecache-size",
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(4 * 1024 * 1024));
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cpu_data(cpuid).ecache_line_size =
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of_getintprop_default(dp, "ecache-line-size", 64);
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cpu_data(cpuid).core_id = 0;
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cpu_data(cpuid).proc_id = -1;
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}
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return NULL;
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}
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void __init of_fill_in_cpu_data(void)
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{
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if (tlb_type == hypervisor)
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return;
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of_populate_present_mask();
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of_iterate_over_cpus(fill_in_one_cpu, 0);
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smp_fill_in_sib_core_maps();
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}
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