sparc64: Fix cmdline_memory_size handling bugs.

[linux-2.6-omap-h63xx.git] / arch / sparc64 / mm / init.c

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index 4e821b3ecb039faa71991809c0d4139354ee2a8d..b4aeb0f696dc4330e837d7e5b085ba0d2fbf4a7f 100644 (file)
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -49,6 +49,7 @@
 #include <asm/sstate.h>
 #include <asm/mdesc.h>
 #include <asm/cpudata.h>
+#include <asm/irq.h>
 
 #define MAX_PHYS_ADDRESS       (1UL << 42UL)
 #define KPTE_BITMAP_CHUNK_SZ   (256UL * 1024UL * 1024UL)
@@ -795,6 +796,9 @@ static unsigned long nid_range(unsigned long start, unsigned long end,
                start += PAGE_SIZE;
        }
 
+       if (start > end)
+               start = end;
+
        return start;
 }
 #else
@@ -1722,8 +1726,7 @@ void __init paging_init(void)
 
        find_ramdisk(phys_base);
 
-       if (cmdline_memory_size)
-               lmb_enforce_memory_limit(phys_base + cmdline_memory_size);
+       lmb_enforce_memory_limit(cmdline_memory_size);
 
        lmb_analyze();
        lmb_dump_all();
@@ -1771,6 +1774,16 @@ void __init paging_init(void)
        if (tlb_type == hypervisor)
                sun4v_mdesc_init();
 
+       /* Once the OF device tree and MDESC have been setup, we know
+        * the list of possible cpus.  Therefore we can allocate the
+        * IRQ stacks.
+        */
+       for_each_possible_cpu(i) {
+               /* XXX Use node local allocations... XXX */
+               softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+               hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+       }
+
        /* Setup bootmem... */
        last_valid_pfn = end_pfn = bootmem_init(phys_base);
 
@@ -1950,6 +1963,15 @@ void __init mem_init(void)
 void free_initmem(void)
 {
        unsigned long addr, initend;
+       int do_free = 1;
+
+       /* If the physical memory maps were trimmed by kernel command
+        * line options, don't even try freeing this initmem stuff up.
+        * The kernel image could have been in the trimmed out region
+        * and if so the freeing below will free invalid page structs.
+        */
+       if (cmdline_memory_size)
+               do_free = 0;
 
        /*
         * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes.
@@ -1964,13 +1986,16 @@ void free_initmem(void)
                        ((unsigned long) __va(kern_base)) -
                        ((unsigned long) KERNBASE));
                memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
-               p = virt_to_page(page);
 
-               ClearPageReserved(p);
-               init_page_count(p);
-               __free_page(p);
-               num_physpages++;
-               totalram_pages++;
+               if (do_free) {
+                       p = virt_to_page(page);
+
+                       ClearPageReserved(p);
+                       init_page_count(p);
+                       __free_page(p);
+                       num_physpages++;
+                       totalram_pages++;
+               }
        }
 }