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| author | Yash Shah <yash.shah@sifive.com> | 2019-11-18 05:58:34 +0000 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-11-22 18:53:26 -0800 |
| commit | 2cc6c4a0da4ab11537b2567952b59af71a90ef12 (patch) | |
| tree | 9d78688eddc42338e6cb8a4c76bc35b49a94ae5e | |
| parent | de29fe308de7e0c5c94af0dd30e825fcc98293fa (diff) | |
| download | linux-stable-2cc6c4a0da4ab11537b2567952b59af71a90ef12.tar.gz linux-stable-2cc6c4a0da4ab11537b2567952b59af71a90ef12.tar.bz2 linux-stable-2cc6c4a0da4ab11537b2567952b59af71a90ef12.zip | |
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: Yash Shah <yash.shah@sifive.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
[paul.walmsley@sifive.com: dropped .init/.text/.data/.bss prints;
added PCI legacy I/O region display]
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
| -rw-r--r-- | arch/riscv/mm/init.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 573463d1c799..c2c0e244555f 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -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 |