1 files changed, 66 insertions, 0 deletions
diff --git a/include/linux/crash_reserve.h b/include/linux/crash_reserve.h
new file mode 100644
index 000000000000..f0dc03d94ca2
--- /dev/null
+++ b/include/linux/crash_reserve.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LINUX_CRASH_RESERVE_H
+#define LINUX_CRASH_RESERVE_H
+
+#include <linux/linkage.h>
+#include <linux/elfcore.h>
+#include <linux/elf.h>
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+#include <asm/crash_reserve.h>
+#endif
+
+/* Location of a reserved region to hold the crash kernel.
+ */
+extern struct resource crashk_res;
+extern struct resource crashk_low_res;
+extern struct range crashk_cma_ranges[];
+#if defined(CONFIG_CMA) && defined(CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION)
+#define CRASHKERNEL_CMA
+#define CRASHKERNEL_CMA_RANGES_MAX 4
+extern int crashk_cma_cnt;
+#else
+#define crashk_cma_cnt 0
+#define CRASHKERNEL_CMA_RANGES_MAX 0
+#endif
+
+
+int __init parse_crashkernel(char *cmdline, unsigned long long system_ram,
+		unsigned long long *crash_size, unsigned long long *crash_base,
+		unsigned long long *low_size, unsigned long long *cma_size,
+		bool *high);
+
+void __init reserve_crashkernel_cma(unsigned long long cma_size);
+
+#ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
+#ifndef arch_add_crash_res_to_iomem
+static inline bool arch_add_crash_res_to_iomem(void)
+{
+	return true;
+}
+#endif
+#ifndef DEFAULT_CRASH_KERNEL_LOW_SIZE
+#define DEFAULT_CRASH_KERNEL_LOW_SIZE	(128UL << 20)
+#endif
+#ifndef CRASH_ALIGN
+#define CRASH_ALIGN			SZ_2M
+#endif
+#ifndef CRASH_ADDR_LOW_MAX
+#define CRASH_ADDR_LOW_MAX		SZ_4G
+#endif
+#ifndef CRASH_ADDR_HIGH_MAX
+#define CRASH_ADDR_HIGH_MAX		memblock_end_of_DRAM()
+#endif
+
+void __init reserve_crashkernel_generic(unsigned long long crash_size,
+					unsigned long long crash_base,
+					unsigned long long crash_low_size,
+					bool high);
+#else
+static inline void __init reserve_crashkernel_generic(
+		unsigned long long crash_size,
+		unsigned long long crash_base,
+		unsigned long long crash_low_size,
+		bool high)
+{}
+#endif
+#endif /* LINUX_CRASH_RESERVE_H */