add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/c6x/kernel/setup.c
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@@ -1,17 +1,13 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  Port on Texas Instruments TMS320C6x architecture
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  *
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  *  Copyright (C) 2004, 2006, 2009, 2010, 2011 Texas Instruments Incorporated
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  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
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- *
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- *  This program is free software; you can redistribute it and/or modify
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- *  it under the terms of the GNU General Public License version 2 as
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- *  published by the Free Software Foundation.
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  */
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 #include <linux/dma-mapping.h>
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 #include <linux/memblock.h>
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 #include <linux/seq_file.h>
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-#include <linux/bootmem.h>
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 #include <linux/clkdev.h>
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 #include <linux/initrd.h>
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 #include <linux/kernel.h>
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@@ -96,7 +92,7 @@
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 	unsigned long core_khz;
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 	u64 tmp;
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 	struct cpuinfo_c6x *p;
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-	struct device_node *node, *np;
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+	struct device_node *node;
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 	p = &per_cpu(cpu_data, smp_processor_id());
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@@ -190,13 +186,8 @@
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 	p->core_id = get_coreid();
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-	node = of_find_node_by_name(NULL, "cpus");
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-	if (node) {
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-		for_each_child_of_node(node, np)
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-			if (!strcmp("cpu", np->name))
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-				++c6x_num_cores;
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-		of_node_put(node);
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-	}
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+	for_each_of_cpu_node(node)
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+		++c6x_num_cores;
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 	node = of_find_node_by_name(NULL, "soc");
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 	if (node) {
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@@ -270,7 +261,7 @@
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 notrace void __init machine_init(unsigned long dt_ptr)
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 {
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 	void *dtb = __va(dt_ptr);
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-	void *fdt = _fdt_start;
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+	void *fdt = __dtb_start;
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 	/* interrupts must be masked */
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 	set_creg(IER, 2);
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@@ -296,8 +287,8 @@
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 void __init setup_arch(char **cmdline_p)
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 {
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-	int bootmap_size;
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-	struct memblock_region *reg;
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+	phys_addr_t start, end;
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+	u64 i;
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 	printk(KERN_INFO "Initializing kernel\n");
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@@ -353,17 +344,7 @@
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 	init_mm.end_data   = memory_start;
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 	init_mm.brk        = memory_start;
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-	/*
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-	 * Give all the memory to the bootmap allocator,  tell it to put the
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-	 * boot mem_map at the start of memory
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-	 */
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-	bootmap_size = init_bootmem_node(NODE_DATA(0),
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-					 memory_start >> PAGE_SHIFT,
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-					 PAGE_OFFSET >> PAGE_SHIFT,
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-					 memory_end >> PAGE_SHIFT);
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-	memblock_reserve(memory_start, bootmap_size);
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-
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-	unflatten_device_tree();
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+	unflatten_and_copy_device_tree();
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 	c6x_cache_init();
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@@ -371,9 +352,9 @@
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 	disable_caching(ram_start, ram_end - 1);
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 	/* Set caching of external RAM used by Linux */
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-	for_each_memblock(memory, reg)
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-		enable_caching(CACHE_REGION_START(reg->base),
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-			       CACHE_REGION_START(reg->base + reg->size - 1));
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+	for_each_mem_range(i, &start, &end)
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+		enable_caching(CACHE_REGION_START(start),
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+			       CACHE_REGION_START(end - 1));
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 #ifdef CONFIG_BLK_DEV_INITRD
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 	/*
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@@ -397,22 +378,9 @@
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 	/* Initialize the coherent memory allocator */
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 	coherent_mem_init(dma_start, dma_size);
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-	/*
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-	 * Free all memory as a starting point.
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-	 */
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-	free_bootmem(PAGE_OFFSET, memory_end - PAGE_OFFSET);
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-
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-	/*
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-	 * Then reserve memory which is already being used.
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-	 */
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-	for_each_memblock(reserved, reg) {
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-		pr_debug("reserved - 0x%08x-0x%08x\n",
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-			 (u32) reg->base, (u32) reg->size);
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-		reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
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-	}
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-
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 	max_low_pfn = PFN_DOWN(memory_end);
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 	min_low_pfn = PFN_UP(memory_start);
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+	max_pfn = max_low_pfn;
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 	max_mapnr = max_low_pfn - min_low_pfn;
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 	/* Get kmalloc into gear */