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Release 4.14 arch/powerpc/platforms/cell/cbe_regs.c

/*
 * cbe_regs.c
 *
 * Accessor routines for the various MMIO register blocks of the CBE
 *
 * (c) 2006 Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
 */

#include <linux/percpu.h>
#include <linux/types.h>
#include <linux/export.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/ptrace.h>
#include <asm/cell-regs.h>

/*
 * Current implementation uses "cpu" nodes. We build our own mapping
 * array of cpu numbers to cpu nodes locally for now to allow interrupt
 * time code to have a fast path rather than call of_get_cpu_node(). If
 * we implement cpu hotplug, we'll have to install an appropriate norifier
 * in order to release references to the cpu going away
 */

static struct cbe_regs_map
{
	
struct device_node *cpu_node;
	
struct device_node *be_node;
	
struct cbe_pmd_regs __iomem *pmd_regs;
	
struct cbe_iic_regs __iomem *iic_regs;
	
struct cbe_mic_tm_regs __iomem *mic_tm_regs;
	
struct cbe_pmd_shadow_regs pmd_shadow_regs;

} cbe_regs_maps[MAX_CBE];

static int cbe_regs_map_count;


static struct cbe_thread_map
{
	
struct device_node *cpu_node;
	
struct device_node *be_node;
	
struct cbe_regs_map *regs;
	
unsigned int thread_id;
	
unsigned int cbe_id;

} cbe_thread_map[NR_CPUS];


static cpumask_t cbe_local_mask[MAX_CBE] = { [0 ... MAX_CBE-1] = {CPU_BITS_NONE} };

static cpumask_t cbe_first_online_cpu = { CPU_BITS_NONE };


static struct cbe_regs_map *cbe_find_map(struct device_node *np) { int i; struct device_node *tmp_np; if (strcasecmp(np->type, "spe")) { for (i = 0; i < cbe_regs_map_count; i++) if (cbe_regs_maps[i].cpu_node == np || cbe_regs_maps[i].be_node == np) return &cbe_regs_maps[i]; return NULL; } if (np->data) return np->data; /* walk up path until cpu or be node was found */ tmp_np = np; do { tmp_np = tmp_np->parent; /* on a correct devicetree we wont get up to root */ BUG_ON(!tmp_np); } while (strcasecmp(tmp_np->type, "cpu") && strcasecmp(tmp_np->type, "be")); np->data = cbe_find_map(tmp_np); return np->data; }

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Christian Krafft7451.39%133.33%
David Erb5538.19%133.33%
Benjamin Herrenschmidt1510.42%133.33%
Total144100.00%3100.00%


struct cbe_pmd_regs __iomem *cbe_get_pmd_regs(struct device_node *np) { struct cbe_regs_map *map = cbe_find_map(np); if (map == NULL) return NULL; return map->pmd_regs; }

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Benjamin Herrenschmidt37100.00%1100.00%
Total37100.00%1100.00%

EXPORT_SYMBOL_GPL(cbe_get_pmd_regs);
struct cbe_pmd_regs __iomem *cbe_get_cpu_pmd_regs(int cpu) { struct cbe_regs_map *map = cbe_thread_map[cpu].regs; if (map == NULL) return NULL; return map->pmd_regs; }

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Benjamin Herrenschmidt37100.00%1100.00%
Total37100.00%1100.00%

EXPORT_SYMBOL_GPL(cbe_get_cpu_pmd_regs);
struct cbe_pmd_shadow_regs *cbe_get_pmd_shadow_regs(struct device_node *np) { struct cbe_regs_map *map = cbe_find_map(np); if (map == NULL) return NULL; return &map->pmd_shadow_regs; }

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struct cbe_pmd_shadow_regs *cbe_get_cpu_pmd_shadow_regs(int cpu) { struct cbe_regs_map *map = cbe_thread_map[cpu].regs; if (map == NULL) return NULL; return &map->pmd_shadow_regs; }

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struct cbe_iic_regs __iomem *cbe_get_iic_regs(struct device_node *np) { struct cbe_regs_map *map = cbe_find_map(np); if (map == NULL) return NULL; return map->iic_regs; }

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Benjamin Herrenschmidt37100.00%1100.00%
Total37100.00%1100.00%


struct cbe_iic_regs __iomem *cbe_get_cpu_iic_regs(int cpu) { struct cbe_regs_map *map = cbe_thread_map[cpu].regs; if (map == NULL) return NULL; return map->iic_regs; }

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Benjamin Herrenschmidt37100.00%1100.00%
Total37100.00%1100.00%


struct cbe_mic_tm_regs __iomem *cbe_get_mic_tm_regs(struct device_node *np) { struct cbe_regs_map *map = cbe_find_map(np); if (map == NULL) return NULL; return map->mic_tm_regs; }

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David Erb37100.00%1100.00%
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struct cbe_mic_tm_regs __iomem *cbe_get_cpu_mic_tm_regs(int cpu) { struct cbe_regs_map *map = cbe_thread_map[cpu].regs; if (map == NULL) return NULL; return map->mic_tm_regs; }

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David Erb37100.00%1100.00%
Total37100.00%1100.00%

EXPORT_SYMBOL_GPL(cbe_get_cpu_mic_tm_regs);
u32 cbe_get_hw_thread_id(int cpu) { return cbe_thread_map[cpu].thread_id; }

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Maynard Johnson1168.75%150.00%
Christian Krafft531.25%150.00%
Total16100.00%2100.00%

EXPORT_SYMBOL_GPL(cbe_get_hw_thread_id);
u32 cbe_cpu_to_node(int cpu) { return cbe_thread_map[cpu].cbe_id; }

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Christian Krafft16100.00%1100.00%
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EXPORT_SYMBOL_GPL(cbe_cpu_to_node);
u32 cbe_node_to_cpu(int node) { return cpumask_first(&cbe_local_mask[node]); }

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Christian Krafft1794.44%150.00%
Motohiro Kosaki15.56%150.00%
Total18100.00%2100.00%

EXPORT_SYMBOL_GPL(cbe_node_to_cpu);
static struct device_node *cbe_get_be_node(int cpu_id) { struct device_node *np; for_each_node_by_type (np, "be") { int len,i; const phandle *cpu_handle; cpu_handle = of_get_property(np, "cpus", &len); /* * the CAB SLOF tree is non compliant, so we just assume * there is only one node */ if (WARN_ON_ONCE(!cpu_handle)) return np; for (i=0; i<len; i++) if (of_find_node_by_phandle(cpu_handle[i]) == of_get_cpu_node(cpu_id, NULL)) return np; } return NULL; }

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Christian Krafft6468.09%250.00%
Benjamin Herrenschmidt1819.15%125.00%
Jean-Christophe Dubois1212.77%125.00%
Total94100.00%4100.00%


static void __init cbe_fill_regs_map(struct cbe_regs_map *map) { if(map->be_node) { struct device_node *be, *np; be = map->be_node; for_each_node_by_type(np, "pervasive") if (of_get_parent(np) == be) map->pmd_regs = of_iomap(np, 0); for_each_node_by_type(np, "CBEA-Internal-Interrupt-Controller") if (of_get_parent(np) == be) map->iic_regs = of_iomap(np, 2); for_each_node_by_type(np, "mic-tm") if (of_get_parent(np) == be) map->mic_tm_regs = of_iomap(np, 0); } else { struct device_node *cpu; /* That hack must die die die ! */ const struct address_prop { unsigned long address; unsigned int len; } __attribute__((packed)) *prop; cpu = map->cpu_node; prop = of_get_property(cpu, "pervasive", NULL); if (prop != NULL) map->pmd_regs = ioremap(prop->address, prop->len); prop = of_get_property(cpu, "iic", NULL); if (prop != NULL) map->iic_regs = ioremap(prop->address, prop->len); prop = of_get_property(cpu, "mic-tm", NULL); if (prop != NULL) map->mic_tm_regs = ioremap(prop->address, prop->len); } }

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Christian Krafft12751.84%233.33%
Benjamin Herrenschmidt8333.88%116.67%
David Erb3112.65%116.67%
Stephen Rothwell31.22%116.67%
Daniel Axtens10.41%116.67%
Total245100.00%6100.00%


void __init cbe_regs_init(void) { int i; unsigned int thread_id; struct device_node *cpu; /* Build local fast map of CPUs */ for_each_possible_cpu(i) { cbe_thread_map[i].cpu_node = of_get_cpu_node(i, &thread_id); cbe_thread_map[i].be_node = cbe_get_be_node(i); cbe_thread_map[i].thread_id = thread_id; } /* Find maps for each device tree CPU */ for_each_node_by_type(cpu, "cpu") { struct cbe_regs_map *map; unsigned int cbe_id; cbe_id = cbe_regs_map_count++; map = &cbe_regs_maps[cbe_id]; if (cbe_regs_map_count > MAX_CBE) { printk(KERN_ERR "cbe_regs: More BE chips than supported" "!\n"); cbe_regs_map_count--; of_node_put(cpu); return; } map->cpu_node = cpu; for_each_possible_cpu(i) { struct cbe_thread_map *thread = &cbe_thread_map[i]; if (thread->cpu_node == cpu) { thread->regs = map; thread->cbe_id = cbe_id; map->be_node = thread->be_node; cpumask_set_cpu(i, &cbe_local_mask[cbe_id]); if(thread->thread_id == 0) cpumask_set_cpu(i, &cbe_first_online_cpu); } } cbe_fill_regs_map(map); } }

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Christian Krafft19495.57%133.33%
Julia Lawall52.46%133.33%
Motohiro Kosaki41.97%133.33%
Total203100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Christian Krafft55245.92%214.29%
Benjamin Herrenschmidt33427.79%214.29%
David Erb18315.22%17.14%
Kevin Corry786.49%17.14%
Maynard Johnson161.33%17.14%
Jean-Christophe Dubois121.00%17.14%
Motohiro Kosaki110.92%17.14%
Jon Loeliger60.50%17.14%
Julia Lawall50.42%17.14%
Stephen Rothwell30.25%17.14%
Daniel Axtens10.08%17.14%
Paul Gortmaker10.08%17.14%
Total1202100.00%14100.00%
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