[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/blackfin/mm/init.c b/src/kernel/linux/v4.14/arch/blackfin/mm/init.c
new file mode 100644
index 0000000..b59cd7c
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/blackfin/mm/init.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2004-2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/gfp.h>
+#include <linux/swap.h>
+#include <linux/bootmem.h>
+#include <linux/uaccess.h>
+#include <linux/export.h>
+#include <asm/bfin-global.h>
+#include <asm/pda.h>
+#include <asm/cplbinit.h>
+#include <asm/early_printk.h>
+#include "blackfin_sram.h"
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized data and COW.
+ * Let the bss do its zero-init magic so we don't have to do it ourselves.
+ */
+char empty_zero_page[PAGE_SIZE] __attribute__((aligned(PAGE_SIZE)));
+EXPORT_SYMBOL(empty_zero_page);
+
+#ifndef CONFIG_EXCEPTION_L1_SCRATCH
+#if defined CONFIG_SYSCALL_TAB_L1
+__attribute__((l1_data))
+#endif
+static unsigned long exception_stack[NR_CPUS][1024];
+#endif
+
+struct blackfin_pda cpu_pda[NR_CPUS];
+EXPORT_SYMBOL(cpu_pda);
+
+/*
+ * paging_init() continues the virtual memory environment setup which
+ * was begun by the code in arch/head.S.
+ * The parameters are pointers to where to stick the starting and ending
+ * addresses of available kernel virtual memory.
+ */
+void __init paging_init(void)
+{
+ /*
+ * make sure start_mem is page aligned, otherwise bootmem and
+ * page_alloc get different views of the world
+ */
+ unsigned long end_mem = memory_end & PAGE_MASK;
+
+ unsigned long zones_size[MAX_NR_ZONES] = {
+ [0] = 0,
+ [ZONE_DMA] = (end_mem - CONFIG_PHY_RAM_BASE_ADDRESS) >> PAGE_SHIFT,
+ [ZONE_NORMAL] = 0,
+#ifdef CONFIG_HIGHMEM
+ [ZONE_HIGHMEM] = 0,
+#endif
+ };
+
+ /* Set up SFC/DFC registers (user data space) */
+ set_fs(KERNEL_DS);
+
+ pr_debug("free_area_init -> start_mem is %#lx virtual_end is %#lx\n",
+ PAGE_ALIGN(memory_start), end_mem);
+ free_area_init_node(0, zones_size,
+ CONFIG_PHY_RAM_BASE_ADDRESS >> PAGE_SHIFT, NULL);
+}
+
+asmlinkage void __init init_pda(void)
+{
+ unsigned int cpu = raw_smp_processor_id();
+
+ early_shadow_stamp();
+
+ /* Initialize the PDA fields holding references to other parts
+ of the memory. The content of such memory is still
+ undefined at the time of the call, we are only setting up
+ valid pointers to it. */
+ memset(&cpu_pda[cpu], 0, sizeof(cpu_pda[cpu]));
+
+#ifdef CONFIG_EXCEPTION_L1_SCRATCH
+ cpu_pda[cpu].ex_stack = (unsigned long *)(L1_SCRATCH_START + \
+ L1_SCRATCH_LENGTH);
+#else
+ cpu_pda[cpu].ex_stack = exception_stack[cpu + 1];
+#endif
+
+#ifdef CONFIG_SMP
+ cpu_pda[cpu].imask = 0x1f;
+#endif
+}
+
+void __init mem_init(void)
+{
+ char buf[64];
+
+ high_memory = (void *)(memory_end & PAGE_MASK);
+ max_mapnr = MAP_NR(high_memory);
+ printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr);
+
+ /* This will put all low memory onto the freelists. */
+ free_all_bootmem();
+
+ snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
+ mem_init_print_info(buf);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void __init free_initrd_mem(unsigned long start, unsigned long end)
+{
+#ifndef CONFIG_MPU
+ free_reserved_area((void *)start, (void *)end, -1, "initrd");
+#endif
+}
+#endif
+
+void __ref free_initmem(void)
+{
+#if defined CONFIG_RAMKERNEL && !defined CONFIG_MPU
+ free_initmem_default(-1);
+ if (memory_start == (unsigned long)(&__init_end))
+ memory_start = (unsigned long)(&__init_begin);
+#endif
+}