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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-11 20:58:18 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-05-19 17:32:25 +1000
commit03bf469add176afd8a1a4c493d9f4e0e520db12b (patch)
tree2e36fc188ad74d41066e486771a0ed2a5cd8bc03 /arch/powerpc
parentb73a635f348610304eee543d733a6277f67ba178 (diff)
powerpc: Make early memory scan more resilient to out of order nodes
We keep track of the size of the lowest block of memory and call setup_initial_memory_limit() only after we've parsed them all Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Milton Miller <miltonm@bga.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/kernel/prom.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 5f5e6aed2b7..5311a26dcf4 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -68,6 +68,7 @@ int __initdata iommu_force_on;
unsigned long tce_alloc_start, tce_alloc_end;
u64 ppc64_rma_size;
#endif
+static phys_addr_t first_memblock_size;
static int __init early_parse_mem(char *p)
{
@@ -505,11 +506,14 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
size = 0x80000000ul - base;
}
#endif
-
- /* First MEMBLOCK added, do some special initializations */
- if (memstart_addr == ~(phys_addr_t)0)
- setup_initial_memory_limit(base, size);
- memstart_addr = min((u64)memstart_addr, base);
+ /* Keep track of the beginning of memory -and- the size of
+ * the very first block in the device-tree as it represents
+ * the RMA on ppc64 server
+ */
+ if (base < memstart_addr) {
+ memstart_addr = base;
+ first_memblock_size = size;
+ }
/* Add the chunk to the MEMBLOCK list */
memblock_add(base, size);
@@ -694,6 +698,7 @@ void __init early_init_devtree(void *params)
of_scan_flat_dt(early_init_dt_scan_root, NULL);
of_scan_flat_dt(early_init_dt_scan_memory_ppc, NULL);
+ setup_initial_memory_limit(memstart_addr, first_memblock_size);
/* Save command line for /proc/cmdline and then parse parameters */
strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE);