diff options
| author | Paul Mackerras <paulus@samba.org> | 2011-12-13 17:54:13 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-12-19 14:41:24 +1100 |
| commit | 64968f60e73d7b3f9fca1ca5cd985d75b2cbca44 (patch) | |
| tree | 75035139e84aaeb5875c1197f29ae5a978470c4c /arch | |
| parent | b206590c04a5ffde7d4348964d3b09b574555a66 (diff) | |
powerpc: Only use initrd_end as the limit for alloc_bottom if it's inside the RMO.
As the kernels and initrd's get bigger boot-loaders and possibly
kexec-tools will need to place the initrd outside the RMO. When this
happens we end up with no lowmem and the boot doesn't get very far.
Only use initrd_end as the limit for alloc_bottom if it's inside the
RMO.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/prom_init.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c index df47316f1aee..32b5b05082ea 100644 --- a/arch/powerpc/kernel/prom_init.c +++ b/arch/powerpc/kernel/prom_init.c @@ -1224,14 +1224,6 @@ static void __init prom_init_mem(void) RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); - /* Check if we have an initrd after the kernel, if we do move our bottom - * point to after it - */ - if (RELOC(prom_initrd_start)) { - if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) - RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); - } - /* * If prom_memory_limit is set we reduce the upper limits *except* for * alloc_top_high. This must be the real top of RAM so we can put @@ -1269,6 +1261,15 @@ static void __init prom_init_mem(void) RELOC(alloc_top) = RELOC(rmo_top); RELOC(alloc_top_high) = RELOC(ram_top); + /* + * Check if we have an initrd after the kernel but still inside + * the RMO. If we do move our bottom point to after it. + */ + if (RELOC(prom_initrd_start) && + RELOC(prom_initrd_start) < RELOC(rmo_top) && + RELOC(prom_initrd_end) > RELOC(alloc_bottom)) + RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); + prom_printf("memory layout at init:\n"); prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |