forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
282 lines
6.6 KiB
282 lines
6.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* cbe_regs.c |
|
* |
|
* Accessor routines for the various MMIO register blocks of the CBE |
|
* |
|
* (c) 2006 Benjamin Herrenschmidt <[email protected]>, 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 <linux/pgtable.h> |
|
|
|
#include <asm/io.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 (!of_node_is_type(np, "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 (!of_node_is_type(tmp_np, "cpu") || |
|
!of_node_is_type(tmp_np, "be")); |
|
|
|
np->data = cbe_find_map(tmp_np); |
|
|
|
return np->data; |
|
} |
|
|
|
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; |
|
} |
|
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; |
|
} |
|
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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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; |
|
} |
|
EXPORT_SYMBOL_GPL(cbe_get_cpu_mic_tm_regs); |
|
|
|
u32 cbe_get_hw_thread_id(int cpu) |
|
{ |
|
return cbe_thread_map[cpu].thread_id; |
|
} |
|
EXPORT_SYMBOL_GPL(cbe_get_hw_thread_id); |
|
|
|
u32 cbe_cpu_to_node(int cpu) |
|
{ |
|
return cbe_thread_map[cpu].cbe_id; |
|
} |
|
EXPORT_SYMBOL_GPL(cbe_cpu_to_node); |
|
|
|
u32 cbe_node_to_cpu(int node) |
|
{ |
|
return cpumask_first(&cbe_local_mask[node]); |
|
|
|
} |
|
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; |
|
} |
|
|
|
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); |
|
} |
|
} |
|
|
|
|
|
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); |
|
} |
|
} |
|
|
|
|