From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/arch/powerpc/boot/main.c | 49 +++++++++++++++++++++++++++++++++++++++++++------
1 files changed, 43 insertions(+), 6 deletions(-)
diff --git a/kernel/arch/powerpc/boot/main.c b/kernel/arch/powerpc/boot/main.c
index 78aaf4f..cae31a6 100644
--- a/kernel/arch/powerpc/boot/main.c
+++ b/kernel/arch/powerpc/boot/main.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) Paul Mackerras 1997.
*
* Updates for PPC64 by Todd Inglett, Dave Engebretsen & Peter Bergner.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <stdarg.h>
#include <stddef.h>
@@ -108,7 +104,7 @@
{
/* If we have an image attached to us, it overrides anything
* supplied by the loader. */
- if (_initrd_end > _initrd_start) {
+ if (&_initrd_end > &_initrd_start) {
printf("Attached initrd image at 0x%p-0x%p\n\r",
_initrd_start, _initrd_end);
initrd_addr = (unsigned long)_initrd_start;
@@ -149,6 +145,46 @@
return (struct addr_range){(void *)initrd_addr, initrd_size};
}
+
+#ifdef __powerpc64__
+static void prep_esm_blob(struct addr_range vmlinux, void *chosen)
+{
+ unsigned long esm_blob_addr, esm_blob_size;
+
+ /* Do we have an ESM (Enter Secure Mode) blob? */
+ if (&_esm_blob_end <= &_esm_blob_start)
+ return;
+
+ printf("Attached ESM blob at 0x%p-0x%p\n\r",
+ _esm_blob_start, _esm_blob_end);
+ esm_blob_addr = (unsigned long)_esm_blob_start;
+ esm_blob_size = _esm_blob_end - _esm_blob_start;
+
+ /*
+ * If the ESM blob is too low it will be clobbered when the
+ * kernel relocates to its final location. In this case,
+ * allocate a safer place and move it.
+ */
+ if (esm_blob_addr < vmlinux.size) {
+ void *old_addr = (void *)esm_blob_addr;
+
+ printf("Allocating 0x%lx bytes for esm_blob ...\n\r",
+ esm_blob_size);
+ esm_blob_addr = (unsigned long)malloc(esm_blob_size);
+ if (!esm_blob_addr)
+ fatal("Can't allocate memory for ESM blob !\n\r");
+ printf("Relocating ESM blob 0x%lx <- 0x%p (0x%lx bytes)\n\r",
+ esm_blob_addr, old_addr, esm_blob_size);
+ memmove((void *)esm_blob_addr, old_addr, esm_blob_size);
+ }
+
+ /* Tell the kernel ESM blob address via device tree. */
+ setprop_val(chosen, "linux,esm-blob-start", (u32)(esm_blob_addr));
+ setprop_val(chosen, "linux,esm-blob-end", (u32)(esm_blob_addr + esm_blob_size));
+}
+#else
+static inline void prep_esm_blob(struct addr_range vmlinux, void *chosen) { }
+#endif
/* A buffer that may be edited by tools operating on a zImage binary so as to
* edit the command line passed to vmlinux (by setting /chosen/bootargs).
@@ -218,6 +254,7 @@
vmlinux = prep_kernel();
initrd = prep_initrd(vmlinux, chosen,
loader_info.initrd_addr, loader_info.initrd_size);
+ prep_esm_blob(vmlinux, chosen);
prep_cmdline(chosen);
printf("Finalizing device tree...");
--
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