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-rw-r--r--arch/powerpc/kernel/early_32.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c
new file mode 100644
index 000000000..ef2ad4945
--- /dev/null
+++ b/arch/powerpc/kernel/early_32.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Early init before relocation
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/asm-prototypes.h>
+
+/*
+ * We're called here very early in the boot.
+ *
+ * Note that the kernel may be running at an address which is different
+ * from the address that it was linked at, so we must use RELOC/PTRRELOC
+ * to access static data (including strings). -- paulus
+ */
+notrace unsigned long __init early_init(unsigned long dt_ptr)
+{
+ unsigned long kva, offset = reloc_offset();
+
+ kva = *PTRRELOC(&kernstart_virt_addr);
+
+ /* First zero the BSS */
+ if (kva == KERNELBASE)
+ memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
+
+ /*
+ * Identify the CPU type and fix up code sections
+ * that depend on which cpu we have.
+ */
+ identify_cpu(offset, mfspr(SPRN_PVR));
+
+ apply_feature_fixups();
+
+ return kva + offset;
+}