Commit d18d6d65 authored by Ingo Molnar's avatar Ingo Molnar

x86: early_ioremap(), debugging

add early_ioremap() debug printouts via the early_ioremap_debug
boot option.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent bd796ed0
......@@ -208,6 +208,17 @@ void iounmap(volatile void __iomem *addr)
}
EXPORT_SYMBOL(iounmap);
int __initdata early_ioremap_debug;
static int __init early_ioremap_debug_setup(char *str)
{
early_ioremap_debug = 1;
return 1;
}
__setup("early_ioremap_debug", early_ioremap_debug_setup);
static __initdata int after_paging_init;
static __initdata unsigned long bm_pte[1024]
__attribute__((aligned(PAGE_SIZE)));
......@@ -226,6 +237,9 @@ void __init early_ioremap_init(void)
{
unsigned long *pgd;
if (early_ioremap_debug)
printk("early_ioremap_init()\n");
pgd = early_ioremap_pgd(fix_to_virt(FIX_BTMAP_BEGIN));
*pgd = __pa(bm_pte) | _PAGE_TABLE;
memset(bm_pte, 0, sizeof(bm_pte));
......@@ -236,6 +250,9 @@ void __init early_ioremap_clear(void)
{
unsigned long *pgd;
if (early_ioremap_debug)
printk("early_ioremap_clear()\n");
pgd = early_ioremap_pgd(fix_to_virt(FIX_BTMAP_BEGIN));
*pgd = 0;
__flush_tlb_all();
......@@ -303,6 +320,11 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
WARN_ON(system_state != SYSTEM_BOOTING);
nesting = early_ioremap_nested;
if (early_ioremap_debug) {
printk("early_ioremap(%08lx, %08lx) [%d] => ",
phys_addr, size, nesting);
dump_stack();
}
/* Don't allow wraparound or zero size */
last_addr = phys_addr + size - 1;
......@@ -343,6 +365,8 @@ void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
--idx;
--nrpages;
}
if (early_ioremap_debug)
printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
return (void*) (offset + fix_to_virt(idx0));
}
......@@ -358,6 +382,11 @@ void __init early_iounmap(void *addr, unsigned long size)
nesting = --early_ioremap_nested;
WARN_ON(nesting < 0);
if (early_ioremap_debug) {
printk("early_iounmap(%p, %08lx) [%d]\n", addr, size, nesting);
dump_stack();
}
virt_addr = (unsigned long)addr;
if (virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)) {
WARN_ON(1);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment