Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
new file mode 100644
index 000000000..200a4b315
--- /dev/null
+++ b/arch/riscv/mm/init.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2012 Regents of the University of California
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/initrd.h>
+#include <linux/memblock.h>
+#include <linux/swap.h>
+#include <linux/sizes.h>
+
+#include <asm/tlbflush.h>
+#include <asm/sections.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+static void __init zone_sizes_init(void)
+{
+	unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
+
+#ifdef CONFIG_ZONE_DMA32
+	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G,
+			(unsigned long) PFN_PHYS(max_low_pfn)));
+#endif
+	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
+
+	free_area_init_nodes(max_zone_pfns);
+}
+
+void setup_zero_page(void)
+{
+	memset((void *)empty_zero_page, 0, PAGE_SIZE);
+}
+
+void __init paging_init(void)
+{
+	setup_zero_page();
+	local_flush_tlb_all();
+	zone_sizes_init();
+}
+
+void __init mem_init(void)
+{
+#ifdef CONFIG_FLATMEM
+	BUG_ON(!mem_map);
+#endif /* CONFIG_FLATMEM */
+
+	high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
+	free_all_bootmem();
+
+	mem_init_print_info(NULL);
+}
+
+void free_initmem(void)
+{
+	free_initmem_default(0);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+}
+#endif /* CONFIG_BLK_DEV_INITRD */