ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/x86/power/hibernate_64.c b/marvell/linux/arch/x86/power/hibernate_64.c
new file mode 100644
index 0000000..0197095
--- /dev/null
+++ b/marvell/linux/arch/x86/power/hibernate_64.c
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hibernation support for x86-64
+ *
+ * Copyright (c) 2007 Rafael J. Wysocki <rjw@sisk.pl>
+ * Copyright (c) 2002 Pavel Machek <pavel@ucw.cz>
+ * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
+ */
+
+#include <linux/gfp.h>
+#include <linux/smp.h>
+#include <linux/suspend.h>
+#include <linux/scatterlist.h>
+#include <linux/kdebug.h>
+
+#include <crypto/hash.h>
+
+#include <asm/e820/api.h>
+#include <asm/init.h>
+#include <asm/proto.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/mtrr.h>
+#include <asm/sections.h>
+#include <asm/suspend.h>
+#include <asm/tlbflush.h>
+
+static int set_up_temporary_text_mapping(pgd_t *pgd)
+{
+ pmd_t *pmd;
+ pud_t *pud;
+ p4d_t *p4d = NULL;
+ pgprot_t pgtable_prot = __pgprot(_KERNPG_TABLE);
+ pgprot_t pmd_text_prot = __pgprot(__PAGE_KERNEL_LARGE_EXEC);
+
+ /* Filter out unsupported __PAGE_KERNEL* bits: */
+ pgprot_val(pmd_text_prot) &= __default_kernel_pte_mask;
+ pgprot_val(pgtable_prot) &= __default_kernel_pte_mask;
+
+ /*
+ * The new mapping only has to cover the page containing the image
+ * kernel's entry point (jump_address_phys), because the switch over to
+ * it is carried out by relocated code running from a page allocated
+ * specifically for this purpose and covered by the identity mapping, so
+ * the temporary kernel text mapping is only needed for the final jump.
+ * Moreover, in that mapping the virtual address of the image kernel's
+ * entry point must be the same as its virtual address in the image
+ * kernel (restore_jump_address), so the image kernel's
+ * restore_registers() code doesn't find itself in a different area of
+ * the virtual address space after switching over to the original page
+ * tables used by the image kernel.
+ */
+
+ if (pgtable_l5_enabled()) {
+ p4d = (p4d_t *)get_safe_page(GFP_ATOMIC);
+ if (!p4d)
+ return -ENOMEM;
+ }
+
+ pud = (pud_t *)get_safe_page(GFP_ATOMIC);
+ if (!pud)
+ return -ENOMEM;
+
+ pmd = (pmd_t *)get_safe_page(GFP_ATOMIC);
+ if (!pmd)
+ return -ENOMEM;
+
+ set_pmd(pmd + pmd_index(restore_jump_address),
+ __pmd((jump_address_phys & PMD_MASK) | pgprot_val(pmd_text_prot)));
+ set_pud(pud + pud_index(restore_jump_address),
+ __pud(__pa(pmd) | pgprot_val(pgtable_prot)));
+ if (p4d) {
+ p4d_t new_p4d = __p4d(__pa(pud) | pgprot_val(pgtable_prot));
+ pgd_t new_pgd = __pgd(__pa(p4d) | pgprot_val(pgtable_prot));
+
+ set_p4d(p4d + p4d_index(restore_jump_address), new_p4d);
+ set_pgd(pgd + pgd_index(restore_jump_address), new_pgd);
+ } else {
+ /* No p4d for 4-level paging: point the pgd to the pud page table */
+ pgd_t new_pgd = __pgd(__pa(pud) | pgprot_val(pgtable_prot));
+ set_pgd(pgd + pgd_index(restore_jump_address), new_pgd);
+ }
+
+ return 0;
+}
+
+static void *alloc_pgt_page(void *context)
+{
+ return (void *)get_safe_page(GFP_ATOMIC);
+}
+
+static int set_up_temporary_mappings(void)
+{
+ struct x86_mapping_info info = {
+ .alloc_pgt_page = alloc_pgt_page,
+ .page_flag = __PAGE_KERNEL_LARGE_EXEC,
+ .offset = __PAGE_OFFSET,
+ };
+ unsigned long mstart, mend;
+ pgd_t *pgd;
+ int result;
+ int i;
+
+ pgd = (pgd_t *)get_safe_page(GFP_ATOMIC);
+ if (!pgd)
+ return -ENOMEM;
+
+ /* Prepare a temporary mapping for the kernel text */
+ result = set_up_temporary_text_mapping(pgd);
+ if (result)
+ return result;
+
+ /* Set up the direct mapping from scratch */
+ for (i = 0; i < nr_pfn_mapped; i++) {
+ mstart = pfn_mapped[i].start << PAGE_SHIFT;
+ mend = pfn_mapped[i].end << PAGE_SHIFT;
+
+ result = kernel_ident_mapping_init(&info, pgd, mstart, mend);
+ if (result)
+ return result;
+ }
+
+ temp_pgt = __pa(pgd);
+ return 0;
+}
+
+asmlinkage int swsusp_arch_resume(void)
+{
+ int error;
+
+ /* We have got enough memory and from now on we cannot recover */
+ error = set_up_temporary_mappings();
+ if (error)
+ return error;
+
+ error = relocate_restore_code();
+ if (error)
+ return error;
+
+ restore_image();
+ return 0;
+}