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Diffstat (limited to 'src/arch/arm64/cpu.c')
-rw-r--r--src/arch/arm64/cpu.c225
1 files changed, 5 insertions, 220 deletions
diff --git a/src/arch/arm64/cpu.c b/src/arch/arm64/cpu.c
index a263e1b873..eb08735292 100644
--- a/src/arch/arm64/cpu.c
+++ b/src/arch/arm64/cpu.c
@@ -19,163 +19,19 @@
#include <stdint.h>
#include <stdlib.h>
-#include <arch/barrier.h>
#include <arch/lib_helpers.h>
#include <cpu/cpu.h>
#include <console/console.h>
-#include <gic.h>
#include "cpu-internal.h"
-static struct cpu_info cpu_infos[CONFIG_MAX_CPUS];
+struct cpu_info cpu_infos[CONFIG_MAX_CPUS];
struct cpu_info *bsp_cpu_info;
-static inline struct cpu_info *cpu_info_for_cpu(unsigned int id)
-{
- return &cpu_infos[id];
-}
-
struct cpu_info *cpu_info(void)
{
return cpu_info_for_cpu(smp_processor_id());
}
-static int cpu_online(struct cpu_info *ci)
-{
- return load_acquire(&ci->online) != 0;
-}
-
-static void cpu_mark_online(struct cpu_info *ci)
-{
- store_release(&ci->online, 1);
-}
-
-static inline void cpu_disable_dev(device_t dev)
-{
- dev->enabled = 0;
-}
-
-static struct cpu_driver *locate_cpu_driver(uint32_t midr)
-{
- struct cpu_driver *cur;
-
- for (cur = cpu_drivers; cur != ecpu_drivers; cur++) {
- const struct cpu_device_id *id_table = cur->id_table;
-
- for (; id_table->midr != CPU_ID_END; id_table++) {
- if (id_table->midr == midr)
- return cur;
- }
- }
- return NULL;
-}
-
-static int cpu_set_device_operations(device_t dev)
-{
- uint32_t midr;
- struct cpu_driver *driver;
-
- midr = raw_read_midr_el1();
- driver = locate_cpu_driver(midr);
-
- if (driver == NULL) {
- printk(BIOS_WARNING, "No CPU driver for MIDR %08x\n", midr);
- return -1;
- }
- dev->ops = driver->ops;
- return 0;
-}
-
-/* Set up default SCR values. */
-static void el3_init(void)
-{
- uint32_t scr;
-
- if (get_current_el() != EL3)
- return;
-
- scr = raw_read_scr_el3();
- /* Default to non-secure EL1 and EL0. */
- scr &= ~(SCR_NS_MASK);
- scr |= SCR_NS_ENABLE;
- /* Disable IRQ, FIQ, and external abort interrupt routing. */
- scr &= ~(SCR_IRQ_MASK | SCR_FIQ_MASK | SCR_EA_MASK);
- scr |= SCR_IRQ_DISABLE | SCR_FIQ_DISABLE | SCR_EA_DISABLE;
- /* Enable HVC */
- scr &= ~(SCR_HVC_MASK);
- scr |= SCR_HVC_ENABLE;
- /* Disable SMC */
- scr &= ~(SCR_SMC_MASK);
- scr |= SCR_SMC_DISABLE;
- /* Disable secure instruction fetches. */
- scr &= ~(SCR_SIF_MASK);
- scr |= SCR_SIF_DISABLE;
- /* All lower exception levels 64-bit by default. */
- scr &= ~(SCR_RW_MASK);
- scr |= SCR_LOWER_AARCH64;
- /* Disable secure EL1 access to secure timer. */
- scr &= ~(SCR_ST_MASK);
- scr |= SCR_ST_DISABLE;
- /* Don't trap on WFE or WFI instructions. */
- scr &= ~(SCR_TWI_MASK | SCR_TWE_MASK);
- scr |= SCR_TWI_DISABLE | SCR_TWE_DISABLE;
- raw_write_scr_el3(scr);
- isb();
-}
-
-static void init_this_cpu(void *arg)
-{
- struct cpu_info *ci = arg;
- device_t dev = ci->cpu;
-
- cpu_set_device_operations(dev);
-
- el3_init();
-
- /* Initialize the GIC. */
- gic_init();
-
- if (dev->ops != NULL && dev->ops->init != NULL) {
- dev->initialized = 1;
- printk(BIOS_DEBUG, "%s init\n", dev_path(dev));
- dev->ops->init(dev);
- }
-}
-
-/* Fill in cpu_info structures according to device tree. */
-static void init_cpu_info(struct bus *bus)
-{
- device_t cur;
-
- for (cur = bus->children; cur != NULL; cur = cur->sibling) {
- struct cpu_info *ci;
- unsigned int id = cur->path.cpu.id;
-
- if (cur->path.type != DEVICE_PATH_CPU)
- continue;
-
- /* IDs are currently mapped 1:1 with logical CPU numbers. */
- if (id >= CONFIG_MAX_CPUS) {
- printk(BIOS_WARNING,
- "CPU id %x too large. Disabling.\n", id);
- cpu_disable_dev(cur);
- continue;
- }
-
- ci = cpu_info_for_cpu(id);
- if (ci->cpu != NULL) {
- printk(BIOS_WARNING,
- "Duplicate ID %x in device tree.\n", id);
- cpu_disable_dev(cur);
- }
-
- ci->cpu = cur;
- ci->id = cur->path.cpu.id;
- }
-
- /* Mark current cpu online. */
- cpu_mark_online(cpu_info());
-}
-
static inline int action_queue_empty(struct cpu_action_queue *q)
{
return load_acquire_exclusive(&q->todo) == NULL;
@@ -246,8 +102,8 @@ static void action_run_on_cpu(struct cpu_info *ci, struct cpu_action *action,
{
struct cpu_action_queue *q = &ci->action_queue;
- /* Don't run actions on non-online or enabled devices. */
- if (!cpu_online(ci) || ci->cpu == NULL || !ci->cpu->enabled)
+ /* Don't run actions on non-online cpus. */
+ if (!cpu_online(ci))
return;
if (ci->id == smp_processor_id()) {
@@ -333,14 +189,12 @@ int arch_run_on_all_cpus_but_self_async(struct cpu_action *action)
return __arch_run_on_all_cpus_but_self(action, 0);
}
-void arch_secondary_cpu_init(void)
+
+void arch_cpu_wait_for_action(void)
{
struct cpu_info *ci = cpu_info();
struct cpu_action_queue *q = &ci->action_queue;
- /* Mark this CPU online. */
- cpu_mark_online(ci);
-
while (1) {
struct cpu_action *orig;
struct cpu_action action;
@@ -351,72 +205,3 @@ void arch_secondary_cpu_init(void)
action_queue_complete(q, orig);
}
}
-
-void arch_initialize_cpus(device_t cluster, struct cpu_control_ops *cntrl_ops)
-{
- size_t max_cpus;
- size_t i;
- struct cpu_info *ci;
- void (*entry)(void);
- struct bus *bus;
-
- if (cluster->path.type != DEVICE_PATH_CPU_CLUSTER) {
- printk(BIOS_ERR,
- "CPU init failed. Device is not a CPU_CLUSTER: %s\n",
- dev_path(cluster));
- return;
- }
-
- bus = cluster->link_list;
-
- /* Check if no children under this device. */
- if (bus == NULL)
- return;
-
- entry = prepare_secondary_cpu_startup();
-
- /* Initialize the cpu_info structures. */
- init_cpu_info(bus);
- max_cpus = cntrl_ops->total_cpus();
-
- if (max_cpus > CONFIG_MAX_CPUS) {
- printk(BIOS_WARNING,
- "max_cpus (%zu) exceeds CONFIG_MAX_CPUS (%zu).\n",
- max_cpus, (size_t)CONFIG_MAX_CPUS);
- max_cpus = CONFIG_MAX_CPUS;
- }
-
- for (i = 0; i < max_cpus; i++) {
- device_t dev;
- struct cpu_action action;
-
- ci = cpu_info_for_cpu(i);
- dev = ci->cpu;
-
- /* Disregard CPUs not in device tree. */
- if (dev == NULL)
- continue;
-
- /* Skip disabled CPUs. */
- if (!dev->enabled)
- continue;
-
- if (!cpu_online(ci)) {
- /* Start the CPU. */
- printk(BIOS_DEBUG, "Starting CPU%x\n", ci->id);
- if (cntrl_ops->start_cpu(ci->id, entry)) {
- printk(BIOS_ERR,
- "Failed to start CPU%x\n", ci->id);
- continue;
- }
- /* Wait for CPU to come online. */
- while (!cpu_online(ci));
- printk(BIOS_DEBUG, "CPU%x online.\n", ci->id);
- }
-
- /* Send it the init action. */
- action.run = init_this_cpu;
- action.arg = ci;
- action_run_on_cpu(ci, &action, 1);
- }
-}