#include <asm/diag.h>
#include <asm/elf.h>
#include <asm/asm-offsets.h>
+#include <asm/cacheflush.h>
#include <asm/os_info.h>
#include <asm/switch_to.h>
static int __init machine_kdump_pm_init(void)
{
pm_notifier(machine_kdump_pm_cb, 0);
- /* Create initial mapping for crashkernel memory */
- arch_kexec_unprotect_crashkres();
return 0;
}
arch_initcall(machine_kdump_pm_init);
#ifdef CONFIG_CRASH_DUMP
-/*
- * Map or unmap crashkernel memory
- */
-static void crash_map_pages(int enable)
+void crash_free_reserved_phys_range(unsigned long begin, unsigned long end)
{
- unsigned long size = resource_size(&crashk_res);
-
- BUG_ON(crashk_res.start % KEXEC_CRASH_MEM_ALIGN ||
- size % KEXEC_CRASH_MEM_ALIGN);
- if (enable)
- vmem_add_mapping(crashk_res.start, size);
- else {
- vmem_remove_mapping(crashk_res.start, size);
- if (size)
- os_info_crashkernel_add(crashk_res.start, size);
- else
- os_info_crashkernel_add(0, 0);
- }
+ unsigned long addr, size;
+
+ for (addr = begin; addr < end; addr += PAGE_SIZE)
+ free_reserved_page(pfn_to_page(addr >> PAGE_SHIFT));
+ size = begin - crashk_res.start;
+ if (size)
+ os_info_crashkernel_add(crashk_res.start, size);
+ else
+ os_info_crashkernel_add(0, 0);
+}
+
+static void crash_protect_pages(int protect)
+{
+ unsigned long size;
+
+ if (!crashk_res.end)
+ return;
+ size = resource_size(&crashk_res);
+ if (protect)
+ set_memory_ro(crashk_res.start, size >> PAGE_SHIFT);
+ else
+ set_memory_rw(crashk_res.start, size >> PAGE_SHIFT);
}
-/*
- * Unmap crashkernel memory
- */
void arch_kexec_protect_crashkres(void)
{
- if (crashk_res.end)
- crash_map_pages(0);
+ crash_protect_pages(1);
}
-/*
- * Map crashkernel memory
- */
void arch_kexec_unprotect_crashkres(void)
{
- if (crashk_res.end)
- crash_map_pages(1);
+ crash_protect_pages(0);
}
#endif