Commit 2cc6c4a0 authored by Yash Shah's avatar Yash Shah Committed by Paul Walmsley
Browse files

RISC-V: Add address map dumper 



Add support for dumping the kernel address space layout to the console.
User can enable CONFIG_DEBUG_VM to dump the virtual memory region into
dmesg buffer during boot-up.

Signed-off-by: default avatarYash Shah <yash.shah@sifive.com>
Reviewed-by: default avatarLogan Gunthorpe <logang@deltatee.com>
Reviewed-by: default avatarAnup Patel <anup@brainfault.org>
[paul.walmsley@sifive.com: dropped .init/.text/.data/.bss prints;
 added PCI legacy I/O region display]
Signed-off-by: default avatarPaul Walmsley <paul.walmsley@sifive.com>
parent de29fe30

arch/riscv/mm/init.c

+32 −0
Original line number Diff line number Diff line
@@ -45,6 +45,37 @@ void setup_zero_page(void) 
	memset((void *)empty_zero_page, 0, PAGE_SIZE);

}



#ifdef CONFIG_DEBUG_VM

static inline void print_mlk(char *name, unsigned long b, unsigned long t)

{

	pr_notice("%12s : 0x%08lx - 0x%08lx   (%4ld kB)\n", name, b, t,

		  (((t) - (b)) >> 10));

}



static inline void print_mlm(char *name, unsigned long b, unsigned long t)

{

	pr_notice("%12s : 0x%08lx - 0x%08lx   (%4ld MB)\n", name, b, t,

		  (((t) - (b)) >> 20));

}



static void print_vm_layout(void)

{

	pr_notice("Virtual kernel memory layout:\n");

	print_mlk("fixmap", (unsigned long)FIXADDR_START,

		  (unsigned long)FIXADDR_TOP);

	print_mlm("pci io", (unsigned long)PCI_IO_START,

		  (unsigned long)PCI_IO_END);

	print_mlm("vmemmap", (unsigned long)VMEMMAP_START,

		  (unsigned long)VMEMMAP_END);

	print_mlm("vmalloc", (unsigned long)VMALLOC_START,

		  (unsigned long)VMALLOC_END);

	print_mlm("lowmem", (unsigned long)PAGE_OFFSET,

		  (unsigned long)high_memory);

}

#else

static void print_vm_layout(void) { }

#endif /* CONFIG_DEBUG_VM */



void __init mem_init(void)

{

#ifdef CONFIG_FLATMEM
@@ -55,6 +86,7 @@ void __init mem_init(void) 
	memblock_free_all();



	mem_init_print_info(NULL);

	print_vm_layout();

}



#ifdef CONFIG_BLK_DEV_INITRD

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