--- zzzz-none-000/linux-4.4.271/arch/arm/mm/init.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/arch/arm/mm/init.c	2023-04-19 10:22:27.000000000 +0000
@@ -23,7 +23,6 @@
 #include <linux/dma-contiguous.h>
 #include <linux/sizes.h>
 #include <linux/stop_machine.h>
-
 #include <asm/cp15.h>
 #include <asm/mach-types.h>
 #include <asm/memblock.h>
@@ -152,7 +151,8 @@
 	 */
 	zone_size[0] = max_low - min;
 #ifdef CONFIG_HIGHMEM
-	zone_size[ZONE_HIGHMEM] = max_high - max_low;
+	if (max_high >= max_low)
+		zone_size[ZONE_HIGHMEM] = max_high - max_low;
 #endif
 
 	/*
@@ -272,6 +272,8 @@
 	early_init_fdt_reserve_self();
 	early_init_fdt_scan_reserved_mem();
 
+	avm_mtdram_mem_reserve();
+
 	/* reserve memory for DMA contiguous allocations */
 	dma_contiguous_reserve(arm_dma_limit);
 
@@ -473,6 +475,7 @@
  */
 void __init mem_init(void)
 {
+
 #ifdef CONFIG_HAVE_TCM
 	/* These pointers are filled in on TCM detection */
 	extern u32 dtcm_end;
@@ -567,6 +570,7 @@
 		 */
 		sysctl_overcommit_memory = OVERCOMMIT_ALWAYS;
 	}
+
 }
 
 #ifdef CONFIG_ARM_KERNMEM_PERMS
@@ -758,11 +762,18 @@
 #endif
 }
 
+#if defined(CONFIG_AVM_ENHANCED)
+void __init avm_mtd_cleanup(void);
+#endif
 void free_initmem(void)
 {
 	fix_kernmem_perms();
 	free_tcmmem();
 
+#if defined(CONFIG_AVM_ENHANCED)
+    avm_mtd_cleanup();
+#endif
+
 	poison_init_mem(__init_begin, __init_end - __init_begin);
 	if (!machine_is_integrator() && !machine_is_cintegrator())
 		free_initmem_default(-1);
@@ -793,3 +804,12 @@
 
 __setup("keepinitrd", keepinitrd_setup);
 #endif
+
+#ifdef CONFIG_QCA_MINIDUMP
+/* Get base address of PGD.*/
+void minidump_get_pgd_info(uint64_t *pt_start, uint64_t *pt_len)
+{
+	*pt_start = (uintptr_t)swapper_pg_dir;
+	*pt_len = SZ_16K;
+}
+#endif