It's useful to have some printed map of the kernel virtual memory, at least for debugging purpose. Signed-off-by: Serge Semin <fancer.lancer@xxxxxxxxx> --- arch/mips/mm/init.c | 47 +++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 13a032f..35e7ba8 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -32,6 +32,7 @@ #include <linux/hardirq.h> #include <linux/gfp.h> #include <linux/kcore.h> +#include <linux/sizes.h> #include <asm/asm-offsets.h> #include <asm/bootinfo.h> @@ -106,6 +107,49 @@ static void __init zone_sizes_init(void) } /* + * Print out kernel memory layout + */ +#define MLK(b, t) b, t, ((t) - (b)) >> 10 +#define MLM(b, t) b, t, ((t) - (b)) >> 20 +#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K) +static void __init mem_print_kmap_info(void) +{ + pr_notice("Virtual kernel memory layout:\n" + " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" + " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" +#ifdef CONFIG_HIGHMEM + " pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n" +#endif + " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" + " .text : 0x%p" " - 0x%p" " (%4td kB)\n" + " .data : 0x%p" " - 0x%p" " (%4td kB)\n" + " .init : 0x%p" " - 0x%p" " (%4td kB)\n", + MLM(PAGE_OFFSET, (unsigned long)high_memory), + MLM(VMALLOC_START, VMALLOC_END), +#ifdef CONFIG_HIGHMEM + MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP)*(PAGE_SIZE)), +#endif + MLK(FIXADDR_START, FIXADDR_TOP), + MLK_ROUNDUP(_text, _etext), + MLK_ROUNDUP(_sdata, _edata), + MLK_ROUNDUP(__init_begin, __init_end)); + + /* Check some fundamental inconsistencies. May add something else? */ +#ifdef CONFIG_HIGHMEM + BUILD_BUG_ON(VMALLOC_END < PAGE_OFFSET); + BUG_ON(VMALLOC_END < (unsigned long)high_memory); +#endif + BUILD_BUG_ON((PKMAP_BASE) + (LAST_PKMAP)*(PAGE_SIZE) < PAGE_OFFSET); + BUG_ON((PKMAP_BASE) + (LAST_PKMAP)*(PAGE_SIZE) < + (unsigned long)high_memory); + BUILD_BUG_ON(FIXADDR_TOP < PAGE_OFFSET); + BUG_ON(FIXADDR_TOP < (unsigned long)high_memory); +} +#undef MLK +#undef MLM +#undef MLK_ROUNDUP + +/* * Not static inline because used by IP27 special magic initialization code */ void setup_zero_pages(void) @@ -492,6 +536,9 @@ void __init mem_init(void) /* Free highmemory registered in memblocks */ mem_init_free_highmem(); + /* Print out kernel memory layout */ + mem_print_kmap_info(); + /* Print out memory areas statistics */ mem_init_print_info(NULL); -- 2.6.6 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html