add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/nios2/kernel/setup.c
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@@ -16,7 +16,7 @@
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 #include <linux/sched.h>
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 #include <linux/sched/task.h>
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 #include <linux/console.h>
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-#include <linux/bootmem.h>
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+#include <linux/memblock.h>
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 #include <linux/initrd.h>
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 #include <linux/of_fdt.h>
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 #include <linux/screen_info.h>
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@@ -123,7 +123,7 @@
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 		dtb_passed = r6;
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 		if (r7)
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-			strncpy(cmdline_passed, (char *)r7, COMMAND_LINE_SIZE);
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+			strlcpy(cmdline_passed, (char *)r7, COMMAND_LINE_SIZE);
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 	}
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 #endif
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@@ -131,10 +131,10 @@
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 #ifndef CONFIG_CMDLINE_FORCE
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 	if (cmdline_passed[0])
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-		strncpy(boot_command_line, cmdline_passed, COMMAND_LINE_SIZE);
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+		strlcpy(boot_command_line, cmdline_passed, COMMAND_LINE_SIZE);
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 #ifdef CONFIG_NIOS2_CMDLINE_IGNORE_DTB
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 	else
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-		strncpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
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+		strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
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 #endif
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 #endif
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@@ -143,10 +143,12 @@
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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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+	int dram_start;
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 	console_verbose();
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+	dram_start = memblock_start_of_DRAM();
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+	memory_size = memblock_phys_mem_size();
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 	memory_start = PAGE_ALIGN((unsigned long)__pa(_end));
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 	memory_end = (unsigned long) CONFIG_NIOS2_MEM_BASE + memory_size;
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@@ -163,39 +165,11 @@
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 	max_low_pfn = PFN_DOWN(memory_end);
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 	max_mapnr = max_low_pfn;
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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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-	pr_debug("init_bootmem_node(?,%#lx, %#x, %#lx)\n",
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-		min_low_pfn, PFN_DOWN(PHYS_OFFSET), max_low_pfn);
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-	bootmap_size = init_bootmem_node(NODE_DATA(0),
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-					min_low_pfn, PFN_DOWN(PHYS_OFFSET),
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-					max_low_pfn);
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-
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-	/*
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-	 * free the usable memory,  we have to make sure we do not free
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-	 * the bootmem bitmap so we then reserve it after freeing it :-)
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-	 */
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-	pr_debug("free_bootmem(%#lx, %#lx)\n",
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-		memory_start, memory_end - memory_start);
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-	free_bootmem(memory_start, memory_end - memory_start);
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-
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-	/*
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-	 * Reserve the bootmem bitmap itself as well. We do this in two
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-	 * steps (first step was init_bootmem()) because this catches
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-	 * the (very unlikely) case of us accidentally initializing the
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-	 * bootmem allocator with an invalid RAM area.
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-	 *
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-	 * Arguments are start, size
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-	 */
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-	pr_debug("reserve_bootmem(%#lx, %#x)\n", memory_start, bootmap_size);
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-	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
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-
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+	memblock_reserve(dram_start, memory_start - dram_start);
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 #ifdef CONFIG_BLK_DEV_INITRD
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 	if (initrd_start) {
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-		reserve_bootmem(virt_to_phys((void *)initrd_start),
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-				initrd_end - initrd_start, BOOTMEM_DEFAULT);
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+		memblock_reserve(virt_to_phys((void *)initrd_start),
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+				initrd_end - initrd_start);
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 	}
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 #endif /* CONFIG_BLK_DEV_INITRD */
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@@ -222,8 +196,4 @@
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 	 * get kmalloc into gear
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 	 */
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 	paging_init();
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-
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-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
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-	conswitchp = &dummy_con;
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-#endif
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 }