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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/boot/epapr.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/boot/epapr.c')
-rw-r--r--arch/powerpc/boot/epapr.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/powerpc/boot/epapr.c b/arch/powerpc/boot/epapr.c
new file mode 100644
index 0000000000..7c5b26ade6
--- /dev/null
+++ b/arch/powerpc/boot/epapr.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Bootwrapper for ePAPR compliant firmwares
+ *
+ * Copyright 2010 David Gibson <david@gibson.dropbear.id.au>, IBM Corporation.
+ *
+ * Based on earlier bootwrappers by:
+ * (c) Benjamin Herrenschmidt <benh@kernel.crashing.org>, IBM Corp,\
+ * and
+ * Scott Wood <scottwood@freescale.com>
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ */
+
+#include "ops.h"
+#include "stdio.h"
+#include "io.h"
+#include <libfdt.h>
+
+BSS_STACK(4096);
+
+#define EPAPR_SMAGIC 0x65504150
+#define EPAPR_EMAGIC 0x45504150
+
+static unsigned epapr_magic;
+static unsigned long ima_size;
+static unsigned long fdt_addr;
+
+static void platform_fixups(void)
+{
+ if ((epapr_magic != EPAPR_EMAGIC)
+ && (epapr_magic != EPAPR_SMAGIC))
+ fatal("r6 contained 0x%08x instead of ePAPR magic number\n",
+ epapr_magic);
+
+ if (ima_size < (unsigned long)_end)
+ printf("WARNING: Image loaded outside IMA!"
+ " (_end=%p, ima_size=0x%lx)\n", _end, ima_size);
+ if (ima_size < fdt_addr)
+ printf("WARNING: Device tree address is outside IMA!"
+ "(fdt_addr=0x%lx, ima_size=0x%lx)\n", fdt_addr,
+ ima_size);
+ if (ima_size < fdt_addr + fdt_totalsize((void *)fdt_addr))
+ printf("WARNING: Device tree extends outside IMA!"
+ " (fdt_addr=0x%lx, size=0x%x, ima_size=0x%lx\n",
+ fdt_addr, fdt_totalsize((void *)fdt_addr), ima_size);
+}
+
+void epapr_platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+ epapr_magic = r6;
+ ima_size = r7;
+ fdt_addr = r3;
+
+ /* FIXME: we should process reserve entries */
+
+ simple_alloc_init(_end, ima_size - (unsigned long)_end, 32, 64);
+
+ fdt_init((void *)fdt_addr);
+
+ serial_console_init();
+ platform_ops.fixups = platform_fixups;
+}