/**
@brief The driver need a physical space to run, we allocate and map it to its space
*/
static void allocate_physical_bulk(unsigned long *start, unsigned long *size, unsigned long map_base)
{
struct ke_mem_cluster_info info;
/* Allocate physical for driver system */
if (NULL == km_cluster_alloc(&info, -1, false))
goto err;
else
{
*start = info.page_start;
*size = info.page_count * PAGE_SIZE;
}
/* Map to the virtual address space of driver system to access */
if (NULL == km_map_physical(info.page_start, *size,
(map_base + info.page_start) | KM_MAP_PHYSICAL_FLAG_WITH_VIRTUAL | KM_MAP_PHYSICAL_FLAG_NORMAL_CACHE))
{
goto err1;
}
return;
err1:
km_cluster_dealloc_base(info.page_start, true);
err:
*start = 0;
*size = 0;
}
static void init_a_cpu(struct kc_cpu * cpu)
{
int i;
struct ke_mem_cluster_info info = {0};
for (i = 0; i < KT_PRIORITY_COUNT; i++)
INIT_LIST_HEAD(&cpu->run_queue[i]);
INIT_LIST_HEAD(&cpu->dieing_queue);
/* Idle routine */
cpu->idle_ops = dumy_idle_ops;
/* 安装一个假的THREAD到CPU上，应为在启动阶段我们用CURRENT's preemnt来分配页（防止被抢占的）*/
cpu->cur = &dummy_kmt;
/* Give the cpu a memory cluster */
km_cluster_alloc(&info, 0, false);
cpu->mm_current_cluster = info.km_cluster;
/* Its own pointer for accelerated access */
cpu->self = cpu;
/* Now set an ARCH way to get the cpu environment (km_cpu) */
km_setup_percpu(cpu->id, (unsigned long)cpu);
}