提交 6ca4f749 编写于 作者: H Hollis Blanchard 提交者: Paul Mackerras

powerpc: Force memory size to be a multiple of PAGE_SIZE

Ensure that total memory size is page-aligned, because otherwise
mark_bootmem() gets upset.

This error case was triggered by using 64 KiB pages in the kernel
while arch/powerpc/boot/4xx.c arbitrarily reduced the amount of memory
by 4096 (to work around a chip bug that affects the last 256 bytes of
physical memory).
Signed-off-by: NHollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
上级 f8f50b1b
...@@ -1160,6 +1160,8 @@ static inline void __init phyp_dump_reserve_mem(void) {} ...@@ -1160,6 +1160,8 @@ static inline void __init phyp_dump_reserve_mem(void) {}
void __init early_init_devtree(void *params) void __init early_init_devtree(void *params)
{ {
unsigned long limit;
DBG(" -> early_init_devtree(%p)\n", params); DBG(" -> early_init_devtree(%p)\n", params);
/* Setup flat device-tree pointer */ /* Setup flat device-tree pointer */
...@@ -1200,7 +1202,19 @@ void __init early_init_devtree(void *params) ...@@ -1200,7 +1202,19 @@ void __init early_init_devtree(void *params)
early_reserve_mem(); early_reserve_mem();
phyp_dump_reserve_mem(); phyp_dump_reserve_mem();
lmb_enforce_memory_limit(memory_limit); limit = memory_limit;
if (! limit) {
unsigned long memsize;
/* Ensure that total memory size is page-aligned, because
* otherwise mark_bootmem() gets upset. */
lmb_analyze();
memsize = lmb_phys_mem_size();
if ((memsize & PAGE_MASK) != memsize)
limit = memsize & PAGE_MASK;
}
lmb_enforce_memory_limit(limit);
lmb_analyze(); lmb_analyze();
DBG("Phys. mem: %lx\n", lmb_phys_mem_size()); DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
......
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