提交 2cc6c4a0 编写于 作者: Y Yash Shah 提交者: Paul Walmsley

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: NYash Shah <yash.shah@sifive.com>
Reviewed-by: NLogan Gunthorpe <logang@deltatee.com>
Reviewed-by: NAnup Patel <anup@brainfault.org>
[paul.walmsley@sifive.com: dropped .init/.text/.data/.bss prints;
 added PCI legacy I/O region display]
Signed-off-by: NPaul Walmsley <paul.walmsley@sifive.com>
上级 de29fe30
......@@ -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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