/*
* In order to soft-boot, we need to insert a 1:1 mapping in place of
* the user-mode pages. This will then ensure that we have predictable
* results when turning the mmu off
*/
void setup_mm_for_reboot(char mode)
{
/*
* We need to access to user-mode page tables here. For kernel threads
* we don't have any user-mode mappings so we use the context that we
* "borrowed".
*/
identity_mapping_add(current->active_mm->pgd, 0, TASK_SIZE);
local_flush_tlb_all();
}
static int __init init_static_idmap_hyp(void)
{
hyp_pgd = kzalloc(PTRS_PER_PGD * sizeof(pgd_t), GFP_KERNEL);
if (!hyp_pgd)
return -ENOMEM;
pr_info("Setting up static HYP identity map for 0x%p - 0x%p\n",
__hyp_idmap_text_start, __hyp_idmap_text_end);
identity_mapping_add(hyp_pgd, __hyp_idmap_text_start,
__hyp_idmap_text_end, PMD_SECT_AP1);
return 0;
}
static int __init init_static_idmap(void)
{
idmap_pgd = pgd_alloc(&init_mm);
if (!idmap_pgd)
return -ENOMEM;
identity_mapping_add(idmap_pgd, __idmap_text_start,
__idmap_text_end, 0);
/* Flush L1 for the hardware to see this page table content */
flush_cache_louis();
return 0;
}
static int __init init_static_idmap(void)
{
phys_addr_t idmap_start, idmap_end;
idmap_pgd = pgd_alloc(&init_mm);
if (!idmap_pgd)
return -ENOMEM;
/* Add an identity mapping for the physical address of the section. */
idmap_start = virt_to_phys((void *)__idmap_text_start);
idmap_end = virt_to_phys((void *)__idmap_text_end);
pr_info("Setting up static identity map for 0x%llx - 0x%llx\n",
(long long)idmap_start, (long long)idmap_end);
identity_mapping_add(idmap_pgd, idmap_start, idmap_end);
return 0;
}
static int __init init_static_idmap(void)
{
int ret;
idmap_pgd = pgd_alloc(&init_mm);
if (!idmap_pgd)
return -ENOMEM;
pr_info("Setting up static identity map for 0x%p - 0x%p\n",
__idmap_text_start, __idmap_text_end);
identity_mapping_add(idmap_pgd, __idmap_text_start,
__idmap_text_end, 0);
ret = init_static_idmap_hyp();
/* Flush L1 for the hardware to see this page table content */
flush_cache_louis();
return ret;
}
static int __init init_static_idmap(void)
{
phys_addr_t idmap_start, idmap_end;
idmap_pgd = pgd_alloc(&init_mm);
if (!idmap_pgd)
return -ENOMEM;
/* Add an identity mapping for the physical address of the section. */
idmap_start = virt_to_phys((void *)__idmap_text_start);
idmap_end = virt_to_phys((void *)__idmap_text_end);
pr_info("Setting up static identity map for 0x%llx - 0x%llx\n",
(long long)idmap_start, (long long)idmap_end);
identity_mapping_add(idmap_pgd, idmap_start, idmap_end);
/* Flush L1 for the hardware to see this page table content */
flush_cache_louis();
return 0;
}
